This water heater must be installed and serviced by a qualified person.
Please leave this guide with the householder.
Owner’s Guide
and
Installation Instructions
Continuous Flow
Gas Water Heater
874, 876 series
627 models
An electronic copy of these Owner’s Guide and Installation Instructions can be downloaded from
rheem.com.au and rheem.co.nz.
Rheem Australia Pty Ltd and Rheem New Zealand Limited are the suppliers of the Rheem range of continuous flow gas
water heaters, manufactured in Japan by Paloma Co., Ltd., a world leader in water heater technology and manufacture.
PATENTS
This water heater may be protected by one or more patents or registered designs in the name of
Rheem Australia Pty Ltd, Rheem New Zealand Limited or Paloma Co., Ltd.
TRADEMARKS
®
Registered trademark of Rheem Australia Pty Ltd., or Rheem New Zealand Limited.
™ Trademark of Rheem Australia Pty Ltd., or Rheem New Zealand Limited.
Note: Every care has been taken to ensure accuracy in preparation of this publication.
No liability can be accepted for any consequences, which may arise as a result of its application.
Warning: Upon completion of the installation and commissioning of the water heater, leave this guide
with the householder or a responsible officer. DO NOT leave this guide inside of the cover of the water
heater, as it may interfere with the safe operation of the water heater or ignite when the water heater is
turned on.
HOUSEHOLDER AND INSTALLER PLEASE NOTE
This Owner’s Guide and Installation Instructions is shared for the Australian and New Zealand markets.
Where the content of this document is specific to either market, it is marked with either
AU for Australian specific content or NZ for New Zealand specific content.
The 874627 models in natural gas and Universal LP Gas fuel types are sold in New Zealand.
References to other models do not apply to the New Zealand market.
The 876 series water heater is not sold in New Zealand.
References to these models do not apply to the New Zealand market.
Universal LP Gas models are not sold in Australia.
References to these models do not apply to the Australian market.
3
CONTENTS
HOUSEHOLDER
This booklet contains important information about your
new water heater, including terms of the Rheem warranty.
We recommend you read pages 7 to 48,
and the terms of the Rheem warranty on pages 4 to 6.
The other pages are intended for the installer but may be of interest.
Warranty .................................................................................................................................. 4
Safety, Warnings, Installation Notes ...................................................................................... 7
About Your Water Heater ........................................................................................................ 9
Temperature Control ............................................................................................................. 15
Temperature Control – Standard .......................................................................................... 16
Temperature Control – Deluxe ............................................................................................. 26
Water Supplies ...................................................................................................................... 45
Save A Service Call ............................................................................................................... 46
Installation – Water Heater ................................................................................................... 49
Connections – Plumbing ...................................................................................................... 61
Connections – Electrical ....................................................................................................... 63
EZ LINK System Dual Installation ........................................................................................ 64
Installation – Controllers ...................................................................................................... 69
Commissioning ..................................................................................................................... 76
Draining The Water Heater ................................................................................................... 86
RHEEM AUSTRALIA PTY LTD, A.B.N. 21 098 823 511
www.rheem.com.au, www.rheem.co.nz
For Service Telephone 131 031 AUSTRALIA or 0800 657 335 NEW ZEALAND
4
RHEEM CONTINUOUS FLOW GAS WATER HEATER
WARRANTY – AUSTRALIA AND NEW ZEALAND ONLY
CONTINUOUS FLOW GAS WATER HEATERS 874, 876 SERIES 627 MODELS
1. THE RHEEM WARRANTY – GENERAL
1.1 This warranty is given in Australia by Rheem Australia Pty Limited ABN 21 098 823 511 of 1 Alan Street,
Rydalmere New South Wales, and in New Zealand by Rheem New Zealand Limited of 475 Rosebank
Road Avondale Auckland 1026, the suppliers of Rheem continuous flow gas water heaters.
1.2 Rheem offer a trained and qualified national service network who will repair or replace components at
the address of the water heater subject to the terms of the Rheem warranty. Rheem Service, in addition
can provide preventative maintenance and advice on the operation of your water heater. The Rheem
Service contact number in Australia is 131031, with Contact Centre personnel available 24 hours, 7 days
a week to take your call and if necessary to arrange a service call for during normal working hours
Monday to Friday (hours subject to change) or in New Zealand on 0800 657 335.
1.3 For details about this warranty, you can contact us in Australia on 131031 or by email at
warrantyenqu[email protected] (not for service bookings), or in New Zealand on 0800 657 335 or by
email at rheem@rheem.co.nz (not for service bookings).
1.4 The terms of this warranty and what is covered by it are set out in sections 2 and 3 and apply to water
heaters manufactured after 1
st
September 2018.
1.5 If a subsequent version of this warranty is published, the terms of that warranty and what is covered by
it will apply to water heaters manufactured after the date specified in the subsequent version.
2. TERMS OF THE RHEEM WARRANTY AND EXCLUSIONS TO IT
2.1 The decision of whether to repair or replace a faulty component is at Rheem’s sole discretion.
2.2 If you require a call out and we find that the fault is not covered by the Rheem warranty, you are
responsible for our standard call out charge. If you wish to have the relevant component repaired or
replaced by Rheem, that service will be at your cost.
2.3 Where a failed component or cylinder is replaced under this warranty, the balance of the original
warranty period will remain effective. The replacement does not carry a new Rheem warranty.
2.4 Where the water heater is installed outside the boundaries of a metropolitan area as defined by Rheem
or further than 25 km from either a regional Rheem branch office or an Accredited Rheem Service
Agent / Centre's office, the cost of transport, insurance and travelling between the nearest branch office
or Rheem Accredited Service Agent / Centre’s office and the installed site shall be the owner’s
responsibility.
2.5 Where the water heater is installed in a position that does not allow safe or ready access, the cost of
that access, including the cost of additional materials handling and/or safety equipment, shall be the
owner’s responsibility. In other words, the cost of dismantling or removing cupboards, doors or walls
and the cost of any special equipment to bring the water heater to floor or ground level or to a serviceable
position is not covered by this warranty.
2.6 This warranty only applies to the original and genuine Rheem water heater in its original installed location
and any genuine Rheem replacement parts.
2.7 The Rheem warranty does not cover faults that are a result of:
a) Accidental damage to the water heater or any component (for example: (i) Acts of God such as
floods, storms, fires, lightning strikes and the like; and (ii) third party acts or omissions).
b) Misuse or abnormal use of the water heater.
c) Installation not in accordance with the Owner’s Guide and Installation Instructions or with relevant
statutory and local requirements in the State or Territory in which the water heater is installed.
RHEEM CONTINUOUS FLOW GAS WATER HEATER
WARRANTY – AUSTRALIA AND NEW ZEALAND ONLY
5
CONTINUOUS FLOW GAS WATER HEATERS 874, 876 SERIES 627 MODELS
d) Connection at any time to a water supply that does not comply with the water supply guidelines as
outlined in the Owner’s Guide and Installation Instructions.
e) Repairs, attempts to repair or modifications to the water heater by a person other than Rheem
Service or a Rheem Accredited Service Agent / Centre.
f) Faulty plumbing or faulty gas or power supply.
g) Failure to maintain the water heater in accordance with the Owner's Guide and Installation
Instructions.
h) Transport damage.
i) Fair wear and tear from adverse conditions (for example, corrosion).
j) Cosmetic defects.
k) Ice formation in the waterways of a water heater: where the electricity supply has been switched off
or has failed and the water heater has not been drained in accordance with the instructions; or due
to an ambient temperature below -20°C (including wind chill factor).
2.8 Subject to any statutory provisions to the contrary, this warranty excludes any and all claims for damage
to furniture, carpet, walls, foundations or any other consequential loss either directly or indirectly due to
leakage from the water heater, or due to leakage from fittings and/ or pipe work of metal, plastic or other
materials caused by water temperature, workmanship or other modes of failure.
2.9 If the water heater is not sized to supply the hot water demand in accordance with the guidelines in the
Rheem water heater literature, any resultant fault will not be covered by the Rheem warranty.
2.10 In New Zealand this warranty excludes to the extent permissible all implied warranties set out in the
Sale of Goods Act 1908 (New Zealand) and all guarantees set out in the Consumers Guarantees Act
1993 (New Zealand) to the extent that the goods are acquired for the purpose of resupply in trade
consumption in the course of a process of production or manufacture or repairing or treating in trade
other goods or fixtures on land.
3. WHAT IS COVERED BY THE RHEEM WARRANTY
FOR THE WATER HEATERS DETAILED IN THIS DOCUMENT
3.1 Rheem will repair or replace a faulty component of your water heater if it fails to operate in accordance
with its specifications as follows:
What components
are covered
The period from the date of
installation in which the
fault must appear in order to
be covered
What coverage you receive
All components
Year 1
Repair and/or replacement of the faulty
component, free of charge, including labour.
All components
(only if the water heater is
installed in a single-family
domestic dwelling)
Years 2 & 3
Repair and/or replacement of the faulty
component, free of charge, including labour.
The heat exchanger
(only if the water heater is
installed in a single-family
domestic dwelling)
Years 4 to 10
Replacement heat exchanger, free of
charge. Installation and repair labour costs
are the responsibility of the owner.
RHEEM CONTINUOUS FLOW GAS WATER HEATER
WARRANTY – AUSTRALIA AND NEW ZEALAND ONLY
6
CONTINUOUS FLOW GAS WATER HEATERS 874, 876 SERIES 627 MODELS
4. ENTITLEMENT TO MAKE A CLAIM UNDER THIS WARRANTY
4.1 To be entitled to make a claim under this warranty you need to:
a) Be the owner of the water heater or have consent of the owner to act on their behalf.
b) Contact Rheem Service without undue delay after detection of the defect and, in any event, within
the applicable warranty period.
4.2 You are not entitled to make a claim under this warranty if your water heater:
a) Does not have its original serial numbers or rating labels.
b) Is not installed in Australia or New Zealand.
5. HOW TO MAKE A CLAIM UNDER THIS WARRANTY
5.1 If you wish to make a claim under this warranty, you need to:
a) Contact Rheem on 131031 in Australia or 0800 657 335 in New Zealand and provide owner’s
details, address of the water heater, a contact number and date of installation of the water heater
or if that’s unavailable, the date of manufacture and serial number (from the rating label on the water
heater).
b) Rheem will arrange for the water heater to be tested and assessed on-site.
c) If Rheem determines that you have a valid warranty claim, Rheem will repair or replace the water
heater in accordance with this warranty.
5.2 Any expenses incurred in the making of a claim under this warranty will be borne by you.
6. THE AUSTRALIAN CONSUMER LAW
6.1 In Australia, our goods come with guarantees that cannot be excluded under the Australian Consumer
Law. You are entitled to a replacement or refund for a major failure and for compensation for any other
reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if
the goods fail to be of acceptable quality and the failure does not amount to a major failure.
6.2 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under
the Australian Consumer Law.
7. THE CONSUMER GUARANTEES ACT 1993 (NEW ZEALAND)
7.1 In New Zealand, our goods come with guarantees that cannot be excluded under the Consumer
Guarantees Act 1993 (New Zealand). If the goods fail to comply with the applicable guarantees set out
under the Consumer Guarantees Act 1993 (New Zealand) being the guarantee as to acceptable quality,
the guarantee as to correspondence with description or the guarantee as to repair and parts, or if the
goods fail to comply with any express guarantee given by Rheem, then you are entitled to a replacement
or refund and for compensation for any other reasonably foreseeable loss or damage.
7.2 The Rheem warranty (set out above) is in addition to any rights and remedies that you may have under
the Consumer Guarantees Act 1993 (New Zealand).
7
SAFETY, WARNINGS, INSTALLATION NOTES
It is important you read the following safety and warnings information.
SAFETY AND WARNINGS
• This water heater is only intended to be operated by persons who have the experience or the knowledge
and the capabilities to do so.
• This water heater is not intended to be operated by persons with reduced physical, sensory or mental
capabilities i.e. the infirm, or by children. Children should be supervised to ensure they do not interfere
with the water heater.
• If the power supply cord or plug is damaged, it must be replaced by a qualified person in order to avoid a
hazard. The power supply cord and plug must be replaced with a genuine replacement part available from
Rheem. Phone Rheem Service or their nearest Accredited Service Agent / Centre to arrange for an
inspection.
• The power lead from the water heater must be plugged into a weatherproof electrical outlet. Take care
not to touch the power plug with wet hands.
• The water heater uses 220 - 240 V a.c. electrical power for operation of the control systems and the
combustion fan. The removal of the front panel will expose 220 - 240 V a.c. wiring. It must only be removed
by a qualified person.
• This water heater is supplied with temperature sensors, a FlameSafe
®
protection system and a pressure
relief valve. These devices must not be tampered with or removed. The water heater must not be operated
unless each of these devices is fitted and is in working order.
The Rheem warranty may not cover faults if safety devices or the relief valve are tampered with or
if the installation is not in accordance with these instructions.
• Temperature controllers must not be fitted to this water heater (874 series) if it is installed as an in-series
gas booster with a solar water heater system because water at a temperature much higher than the
controller setting can be delivered. If a solar water heater is installed to an existing water heater
installation, then all controllers must be disconnected and removed.
• For continued safety of this water heater it must be installed, operated and maintained in accordance with
the Owner’s Guide and Installation Instructions.
• Servicing of the water heater must only be carried out by qualified personnel. Phone Rheem Service or
their nearest Accredited Service Agent / Centre.
• Do not modify this water heater.
• Switch off the electrical supply at the power outlet to the water heater prior to performing general
maintenance. This will prevent the water heater from operating while you clean or spray around the water
heater. Refer to “General Maintenance” on page 12 for additional information.
• Do not spray aerosols in the vicinity of this water heater while it
is in operation. Propellants and gases in many aerosol sprays
contain hydrocarbons which are flammable. Gases from aerosol
sprays may also become corrosive when drawn into a flame.
• Do not use or store flammable materials in or near this water
heater. Flammable liquids (such as petrol), combustible
materials (such as newspapers) and similar articles must be kept
well away from the water heater and the flue terminal.
• Do not store swimming pool chemicals, household cleaners,
etc., near the water heater.
• Do not place articles on or against this water heater, or in contact
with the flue terminal. Ensure the flue terminal is not obstructed
in any way at any time.
SAFETY, WARNINGS, INSTALLATION NOTES
8
• Do not use Propane / Butane gas mixtures in a Propane model. A Propane model is designed to operate
on Propane only. The use of Propane / Butane mixture, such as automotive LP gas fuel, in a Propane
model is unsafe and can cause damage to the water heater.
Note: LP gas models sold in New Zealand are designed to operate on the Propane / Butane mixture
supplied in New Zealand. An LP gas model has an LFZ suffix in its model number.
• The water heater has a frost protection system to protect against damage by preventing ice forming in the
waterways of the water heater, in the event of freezing conditions occurring. The frost protection system
will be rendered inoperable if electrical power is not available at the water heater. If it is necessary to
switch the power off to the water heater and there is a risk of freezing, then it is necessary to drain the
water heater. Refer “Frost Protection” on page 11 and to “Draining the Water Heater” on page 13.
INSTALLATION NOTES
This water heater must be installed:
• by a qualified person,
• in accordance with the installation instructions,
• in compliance with the Plumbing Code of Australia (PCA) and Plumbing Standard AS/NZS 3500.4,
▪ This water heater is designed for outdoor installation only.
▪ This water heater is intended to be permanently connected to the water mains and not connected by
a hose-set. A braided flexible hose or semi-flexible connector may be used for connection to the water
heater, where permitted by AS/NZS 3500.4.
• in compliance with the Gas Installations Standard AS/NZS 5601.1,
▪ The Gas installations Standard AS/NZS 5601.1 places limitations on the location of a gas water heater
within a covered area. Refer to “Installation within a Covered Area” on page 51.
• in compliance with all local codes and regulatory authority requirements,
• in New Zealand also conforming to Clauses G11, G12 and H1 of the New Zealand Building Code.
Installation and commissioning requirements and details for the installing plumber and licensed electrical
worker are contained on pages 49 to 85.
Mains pressure water supply
The water heater is designed to operate at mains pressure by connecting directly to the mains water supply.
The maximum mains water supply pressure for the water heater is 1,000 kPa. If the mains supply pressure in
your area exceeds 1,000 kPa, an approved pressure limiting valve that does not have non-return valve
characteristics (such as an RMC PSL series valve) must be installed.
A minimum water supply pressure of 140 kPa is required to achieve the rated flow and performance of the
water heater.
Refer to “Mains Water Supply” on page 51 for additional information.
Mounting of the water heater
This water heater must be installed vertically upright with the water, gas and power connections on the
underside, pointing toward the ground. The back of the water heater can be either against a wall or supported
by a frame. The water heater must be well secured to the wall or frame using two fasteners, suitable for the
wall or frame type, each at the top and bottom of the unit. Refer to the note on page 50 for additional
information.
Alternatively the water heater can be installed recessed into a wall, using a proprietary made recess box from
Rheem for such an installation. Refer to the installation instructions which accompany the recess box kit for
the dimensions of the space required and information on its installation. Refer also to “Recess Installation” on
page 51.
9
ABOUT YOUR WATER HEATER
WATER HEATER APPLICATION
This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable
water. Its use in an application other than this may shorten its life.
MODEL TYPE
The Rheem
®
continuous flow gas water heater model you have chosen is for
outdoor installation only.
The water heater has a maximum preset outlet temperature setting of:
• 874 series 75°C
• 876 series 50°C
Note: The 876 series water heater is marked “THIS APPLIANCE DELIVERS
WATER NOT EXCEEDING 50°C IN ACCORDANCE WITH AS 3498” on the
front panel.
• This model must not be installed as an in-series gas booster to a solar
water heater, as water temperature greater than 50°C can be delivered
from the water heater contravening its compliance to AS 3498.
WATER HEATER OPERATION
The water heater operates automatically, heating water as it passes through the water heater. When a hot tap
is opened, the gas burners ignite to provide immediate heating of the water. The heat produced by the burner
is transferred to the water through the heat exchanger. The water is heated to a constant temperature by the
automatic adjustment of the gas supply to the burner to suit the water flow rate (refer to “Temperature Control”
on pages 15 to 44). The gas burners extinguish when the hot tap is closed. Automatic safety controls are fitted
to the water heater to provide safe and efficient operation.
USER TEMPERATURE CONTROL
The water heater may be installed with one or more user adjustable temperature controllers, which allow you
to choose the most suitable water temperature for your hot water needs (refer to “Temperature Control” on
page 15).
For an 874 series – NZ or an 876 series water heater, if temperature controllers have not been installed and
where they may not be an ideal option to retrofit to your water heater installation, the Rheem EZiSET
TM
system
is an alternative temperature control system. The Rheem EZiSET allows you to control the water temperature
and bath water levels directly from your Smartphone. An appropriately licensed tradesperson must firstly install
the Rheem EZiSET control module into your water heater and a PLT adaptor (supplied in the EZiSET kit) must
also be connected to your Wi-Fi modem before you download the free app onto your Smartphone. No
additional wiring is required.
For further information, visit AU – www.rheem.com.au/Continuous-Flow-Accessories, or NZ –
www.rheem.co.nz/gas-water-heaters/.
Note – The Rheem EZiSET system:
• is suitable for a single water heater installation only.
• cannot be used on the 874 series – NZ or an 876 series water heaters if two of these water heaters are
installed with the Rheem EZ Link system, or if multiple water heaters are manifolded together.
• is not suitable for installation on an 874 series – AU water heater.
ABOUT YOUR WATER HEATER
10
HOW HOT SHOULD THE WATER BE?
If a controller is not installed, the water heater heats the water to the preset outlet temperature setting. The
factory preset outlet temperature setting is:
• 874 series 60°C – AU 55°C – NZ
• 876 series 50°C
Note: The preset outlet temperature setting of this water heater cannot be adjusted by the householder. The
setting can only be adjusted by the installer, Rheem Service or their nearest Accredited Service Agent / Centre.
Australia New Zealand
Note: Australian Standard AS 3498 and New Zealand Building Code Clause G12 requires that a water heater
provides the means to inhibit the growth of Legionella bacteria in potable water. When this water heater is
used as an in-series booster for a solar water heater it can satisfy these AS 3498 and Clause G12 requirements
provided it is energised, the booster preset outlet temperature setting is 70°C, and that a remote temperature
controller is not used.
Warning: Temperature controllers must not be fitted to this water heater (874 series) if it is installed as an
in-series gas booster with a solar water heater system because water at a temperature much higher than the
controller setting can be delivered. If a solar water heater is installed to an existing water heater installation,
then all controllers must be disconnected and removed.
If this water heater is installed as part of a solar water heater system, the system can deliver water at
temperatures from 58°C up to 80°C and possibly higher depending upon the model of solar water heater
installed.
HOTTER WATER INCREASES THE RISK OF SCALD INJURY
This water heater can deliver water at temperatures which can cause scalding.
Check the water temperature before use, such as when entering a shower or filling a bath or basin, to ensure
it is suitable for the application and will not cause scald injury.
874 series – Hot Water Outlet
Depending upon its preset outlet temperature setting, an 874 series water heater can deliver hot water at a
temperature up to 75°C when no temperature controller is installed and 60°C when a temperature controller is
installed. These temperatures are sufficiently hot to cause severe scalding. A model used as a booster to a
solar water heater could on occasion deliver hot water exceeding 75°C. Water at these temperatures may
have been plumbed to fixtures where water hotter than 50°C is allowed, such as the kitchen and laundry.
We recommend and it may be required by regulations that an approved temperature limiting device be fitted
into the hot water piping to the bathroom and ensuite when an 874 series water heater is installed. This will
keep the water temperature below 50°C – AU or 55°C – NZ at the bathroom and ensuite. The risk of scald
injury will be reduced and if no controllers are installed and the preset outlet temperature setting has not been
adjusted below 55°C or if a Kitchen controller is installed, still allow hotter water to the kitchen and laundry.
maximum recommended supply
temperature to bathrooms and ensuites.
maximum Bathroom controller
temperature setting 874 series.
maximum Kitchen and Bathroom
controller temperature setting
876 series.
maximum Kitchen controller
temperature setting 874 series.
maximum recommended supply
temperature to bathrooms and ensuites.
maximum Bathroom controller
temperature setting 874 series
minimum Kitchen and Bathroom
controller temperature setting
maximum Kitchen controller
temperature setting 874 series
minimum Kitchen and Bathroom
controller temperature setting
ABOUT YOUR WATER HEATER
11
876 series – 50°C Limited Outlet
An 876 series water heater delivers water not exceeding 50°C in accordance with AS 3498. The risk of scald
injury will be reduced.
There is no need to fit a temperature limiting device to satisfy the requirements of the Plumbing Code of
Australia, if an 876 series water heater is installed and serving an application where 50°C is the maximum
permissible hot water temperature at the outlet of a fixture used primarily for personal hygiene, such as in a
bathroom or ensuite.
GAS BOOSTING FOR A SOLAR WATER HEATER
The 874 series water heater may be installed as an in-series gas booster to a solar water heater.
Water stored in the solar storage tank passes through the in-series gas booster when a hot tap is opened. The
in-series gas booster is for heating water at times of low solar energy gain, such as during cloudy or rainy
weather, or during colder months.
The in-series gas booster operates automatically. When the solar heated water temperature is below 58°C,
the in-series gas booster heats the water to its preset outlet temperature setting.
Solar heated water can reach temperatures up to 70°C to 80°C for a Premier Loline and Loline pumped system
and possibly higher for a Hiline and Premier Hiline thermosiphon system. When the solar heated water
temperature is 58°C or higher, the flow passes through the in-series gas booster without boosting.
For information relating to the function and operation of the solar water heater, refer to the Owner’s Guide and
Installation Instructions supplied with the solar water heater.
REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD
At a cold start-up, i.e. when the water heater has not operated for some time (which is most often first thing in
the morning), the initial flow of hot water may be reduced for a period of 5-10 seconds while the heat exchanger
warms up. This is both an energy and water saving feature of this water heater. Once the heat exchanger
has warmed up the hot water flow will increase and remain at normal flow levels. This feature will only occur
at a cold start-up and not when the heat exchanger is already warm from a recent use of hot water.
FROST PROTECTION
The water heater has a frost protection system. The frost protection system will protect the water heater from
damage, by preventing ice forming in the waterways of the water heater, in the event of freezing conditions
occurring.
Notes
• The frost protection system will be rendered inoperable if electrical power is not available at the water
heater. Damage caused by freezing due to the unavailability of power at the water heater is not covered
by the Rheem warranty (refer to “Terms of the Rheem Warranty” on page 4).
• If it is necessary to switch the power off to the water heater and there is a risk of freezing, then it is
necessary to drain the water heater (refer to “Draining the Water Heater” on page 13).
• Pipe work to and from the water heater must be adequately insulated to prevent freezing.
• The water heater is not suitable for installation in areas where the ambient temperature falls below -20°C
(including wind chill factor).
• Refer to “Terms of the Rheem Warranty” on page 4.
PRECAUTIONS
The water heater must be maintained in accordance with the Owner’s Guide and Installation Instructions. Refer
to “General Maintenance” on page 12 and “Major Service Every Five Years” on page 12.
If this water heater is to be used where an uninterrupted hot water supply is necessary for your application or
business you should ensure that you have back-up redundancy within the hot water system design. This should
ensure the continuity of hot water supply in the event that this water heater were to become inoperable for any
reason. We recommend you seek advice from a plumber or specifier about your needs and building back-up
redundancy into your hot water supply system.
ABOUT YOUR WATER HEATER
12
GENERAL MAINTENANCE
General maintenance can be performed by the dwelling occupant. It is recommended general maintenance
be conducted every six (6) months or more regularly as required.
Switch off the electrical supply at the power outlet to the water heater prior to performing general maintenance.
This will prevent the water heater from operating while you clean or spray around the water heater. Switch on
the electrical supply at the power outlet to the water heater when finished performing the general maintenance.
The general maintenance includes:
• The jacket of the water heater can be cleaned with a soft cloth and warm mild soapy water if required.
Under no circumstances should abrasive materials or powders be used.
• Inspect around the air inlet, flue terminal and the water heater in general for plant growth.
▪ Trim back any shrubs, bushes or other plants which have encroached around the water heater.
Plant growth across the air inlet and flue terminal can interfere with the performance of the water
heater.
• Inspect around the water heater for infestations of insects, such as ants. Insects encroaching into or
nesting in the water heater can interfere with the operation of the water heater and also damage
components. The area around the water heater can be sprayed with insecticide to rid the area of insects.
Warning: Do not spray insecticide near the water heater while it is operating. Propellants in many
insect sprays contain hydrocarbons which are flammable. Gases from aerosol sprays may also become
corrosive when drawn into a flame.
▪ If necessary to rid the area of insects:
➢ Ensure the electrical supply at the power outlet to the water heater has been switched off.
➢ Spray the affected are, taking care not to spray into the air inlet or flue terminal or onto the surface
of the water heater.
➢ Wait a few minutes to allow any aerosol gases to dissipate before switching on the electrical
supply at the power outlet to the water heater.
MAJOR SERVICE EVERY FIVE YEARS
For safe and efficient operation, it is recommended a major service be conducted on the water heater every
five (5) years.
Warning: Servicing of a water heater must only be carried out by qualified personnel. Phone Rheem
Service or their nearest Accredited Service Agent / Centre.
Note: The major service and routine replacement of any components, if required, are not included in the
Rheem warranty. A charge will be made for this work. Only genuine replacement parts should be used on this
water heater.
The major service includes the following actions:
• Check and if necessary adjust the gas pressure.
• Check the operation of and clean the burner.
• Check and clean the line strainer.
• Visually check the unit for any potential problems.
• Inspect all connections.
ABOUT YOUR WATER HEATER
13
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater:
• Turn off the controller(s) (if fitted) by pressing the on / off ( ) button.
The on / off operating light will go out and the priority light, if it is on, will go out.
• Switch off the electrical supply at the power outlet to the water heater if there is no risk of freezing
conditions occurring (refer to note below).
• Close the gas isolation valve at the inlet to the water heater.
• Close the cold water isolation valve at the inlet to the water heater.
Note: If there is a risk of freezing conditions, the electrical supply to the water heater should not be switched
off unless the water heater is drained, otherwise damage could result (refer to “Frost Protection” on page 11
and “Draining the Water Heater” on page 13).
TO TURN ON THE WATER HEATER
• Screw in the drain plugs at the cold water inlet and hot water outlet of the water heater if the water heater
has been drained.
• Open all of the hot taps in the house (don’t forget the shower).
• Open the cold water isolation valve fully at the inlet to the water heater.
Air will be forced out of the taps.
• Close each tap as water flows freely from it.
• Open the gas isolation valve fully at the inlet to the water heater.
• Plug in the power supply cord at the power outlet.
• Switch on the electrical supply at the power outlet to the water heater.
• Turn on a controller, if one is fitted, by pressing the on / off ( ) button.
The on / off operating light and the priority light will both glow.
The water heater will operate automatically when you open a hot tap.
DRAINING THE WATER HEATER
• Turn off the water heater (refer to “Turn Off The Water Heater” on page 13).
• Open a hot tap (preferably the shower outlet).
• Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet (874 series model) or
50°C limited outlet (876 series model), on the underside of the water heater.
Water will drain from the water heater.
• When water stops flowing from the water heater, close the hot tap.
Note: It is recommended not to screw the drain plugs back in, until the water heater is to be turned on again.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
ABOUT YOUR WATER HEATER
14
CIRCULATED HOT WATER FLOW AND RETURN SYSTEM
A Rheem 874627 model continuous flow water heater can be installed as part of a circulated hot water flow
and return system in a building. Refer to “Circulated Hot Water Flow and Return System” on page 54 for further
information and notes on this type of installation.
GOING ON HOLIDAYS
If you are going on holidays, it is not necessary to turn the water heater off. If it is necessary to turn off the
water heater, refer to “To Turn Off The Water Heater” on page 13.
VICTORIAN CUSTOMERS
Notice to Victorian Customers from the Victorian Building Authority. This water heater must be installed by a
licensed person as required by the Victorian Building Act 1993.
Only a licensed person will give you a Compliance Certificate, showing that the work complies with all the
relevant Standards. Only a licensed person will have insurance protecting their workmanship for 6 years. Make
sure you use a licensed person to install this water heater and ask for your Compliance Certificate.
DOES THE WATER CHEMISTRY AFFECT THE WATER HEATER?
The water heater is suitable for most public water supplies, however some water chemistries may have
detrimental effects on the water heater, its components and fittings. Refer to “Water Supplies” on page 45.
If you are in a known harsh water area or you are not sure of your water chemistry, have your water checked
against the conditions described on page 45.
HOW LONG WILL THE WATER HEATER LAST?
The water heater is supported by a manufacturer’s warranty (refer to page 4). There are a number of factors
that will affect the length of service the water heater will provide. These include but are not limited to the water
chemistry, the water pressure, the water temperature (inlet and outlet) and the water usage pattern. Refer to
“Precautions” on page 11.
15
TEMPERATURE CONTROL
CONTROLLERS
The Rheem 874 and 876 series can be installed with Rheem controllers to enable the user to control the
temperature of the delivered water from the outlet of the water heater. There are two families of Rheem
controllers suitable for installation with this water heater; the standard controllers and the Deluxe controllers.
Standard Controllers
There are three types of standard controller. They are the Kitchen controller (Rheem AU - Part 299850, NZ -
Part A299850), Bathroom 1 controller (Rheem AU - Part 299851, NZ - Part A299851) and the Bathroom 2
controller (Rheem AU - Part 299852, NZ - Part A299852). These part numbers include the controller cable
supplied with the controller.
The standard controllers are identified by a ‘K’ (Kitchen controller), ‘B1’ (Bathroom 1 controller) or ‘B2’
(Bathroom 2 controller) located on the front bottom left hand corner of the standard controller.
Deluxe Controllers
There are three types of Deluxe controller. They are the Kitchen Deluxe controller (Rheem AU - Part 299858,
NZ - Part A299861), Bathroom 1 Deluxe controller (Rheem AU - Part 299859, NZ - Part A299862) and the
Bathroom 2 Deluxe controller (Rheem AU - Part 299860, NZ - Part A299863). These part numbers include the
controller cable supplied with the controller.
The Deluxe controllers are identified by a ‘K’ (Kitchen Deluxe controller), ‘B1’ (Bathroom 1 Deluxe controller)
or ‘B2’ (Bathroom 2 Deluxe controller), located under the front panel, to the bottom left hand corner adjacent
to the BATH FILL VOLUME label.
The Deluxe controllers offer additional functions to the standard controllers. These are:
• An assistance call function, which provides a voice prompt when pressed and will sound on all controllers.
This is useful should a family member require assistance when in the bathroom.
• A Bath Fill function, which is designed to allow the water heater to deliver a selected volume of water at a
selected temperature.
Bath filling takes place when the hot tap is opened. When the set volume has been delivered, the water
flow from the water heater ceases. Refer to “Bath-Fill Function” on page 36.
Note: The bath level should be monitored periodically while this function is in use to avoid the possibility
of the bath overflowing. The Bath Fill function should also be used with caution until you are familiar with
its operation.
Warning: Baths should not be left unattended whenever young children are present.
Warning: Temperature controllers must not be fitted to this water heater (874 series) if it is installed as an
in-series gas booster with a solar water heater system because water at a temperature much higher than the
controller setting can be delivered. If a solar water heater is installed to an existing water heater installation,
then all controllers must be disconnected and removed.
Notes
• Temperature controllers are only suitable for single water heater installations or where two water heaters
are installed and linked together using the Rheem EZ Link system. They are not suitable if multiple water
heaters are manifolded together.
• Where more than one controller is installed, the second or third controller must be of the same family.
• A standard controller can only be installed with another standard controller(s) and a Deluxe controller can
only be installed with another Deluxe controller(s). A standard controller(s) and a Deluxe controller(s)
cannot be connected to the same water heater.
• One, two or three controllers can be installed. Only one of each type of controller can be connected to the
water heater. Therefore, a maximum of three controllers only can be connected to each water heater.
• A Bathroom 2 controller can only be installed if a Bathroom 1 controller is installed and a Bathroom 2
Deluxe controller can only be installed if a Bathroom 1 Deluxe controller is installed.
• Other manufacturers’ controllers are not suitable to and cannot be installed with this water heater.
16
TEMPERATURE CONTROL – STANDARD
STANDARD CONTROLLER FUNCTIONS
If one or more controllers are installed, at least one must be on for the water heater to operate. If all controllers
are off, the water heater will only deliver cold water.
on / off ( ) button – This button must be pressed once to turn on the controller.
A controller cannot be turned on if water is flowing from a hot tap.
To turn off a controller, press the on / off ( ) button once. The light will go out.
A controller can be turned off whilst water is flowing.
on / off operating light – The on / off operating light on the on / off ( ) button will glow when the controller is
turned on.
The light will go out when the controller is turned off.
priority light – This light will glow on a controller when that controller has priority.
The Bathroom controller(s), if they are turned on, have priority over the Kitchen
controller.
Priority means that controller has control of the water heater temperature setting.
The water temperature setting can only be adjusted by the controller that has priority.
in use light – This light will glow on all controllers, whether they are on or off, when hot water is
flowing, regardless of which controller has priority.
display panel – The current temperature setting is displayed on all controllers (whether hot water is
flowing or not), when any controller is on.
If all controllers are off, then the display remains blank.
The water volume can also be displayed on the Kitchen controller. The x 10L symbol
glows when the water volume is displayed.
up () button – The up () button increases the temperature and water volume settings.
Refer to “Temperature Adjustment – Standard Controller” on page 19 and “Water
Volume Function” on page 24.
down () button – The down () button decreases the temperature and water volume settings.
Refer to “Temperature Adjustment – Standard Controller” on page 19 and “Water
Volume Function” on page 24).
water volume ( ) button (Kitchen controller only) – This feature enables an alarm to sound when a set
volume of water has flowed through the water heater.
Refer to “Water Volume Function” on page 24.
water volume operating light – The water volume operating light on the water volume ( ) button will glow
when the water volume ( ) button is pressed and the water volume function is turned
on.
The light will go out when the water volume ( ) button is pressed and the
water volume function is turned off.
water volume symbol – The x 10L symbol below the display panel glows when the water volume function is
turned on and the water volume is displayed.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
TEMPERATURE CONTROL – STANDARD
17
STANDARD CONTROLLER
Note: water volume ( ) button, water volume operating light and water volume symbol are on the Kitchen
controller only.
SILENCING A CONTROLLER – STANDARD
The controller emits a sound whenever a button is pressed. This sound can be turned off to provide silent
operation.
To turn off the sound:
• Press the on / off ( ) button, to deactivate the controller (on / off operating light is off).
• Press and hold the up () button.
• Press the on / off ( ) button, whilst the up () button is pressed.
The sound for the controller is deactivated. Repeat this procedure on the other controllers if you wish to
deactivate their sound. To restore the sound, repeat this procedure.
Rheem
Check hot water tempera ture before use
K
in use
priority
X 10L
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use light
priority light
water volume
operating light
display panel
water volume
symbol
water volume
button
controller type
K = Kitchen
B1 = Bathroom 1
B2 = Bathroom 2
up ()
button
down ()
button
on / off
operating light
on / off
button
TEMPERATURE CONTROL – STANDARD
18
TEMPERATURE SETTINGS – STANDARD CONTROLLER
The temperature settings of each type of controller are:
• Bathroom 1 & 2 37°C to 48°C (in 1°C increments), 50°C
• Kitchen 37°C to 48°C (in 1°C increments), 50°C*, 55°C**, 60°C
* limited to 50°C on an 876 series model.
** NZ – limited to 55°C.
Temperature settings
37
38
39
40
41
42
43
44
45
46
47
48
50
55
60
warm
average hot shower
hot
very hot
The installation of a Bathroom controller(s) only (i.e. no Kitchen controller) limits the temperature setting of the
water heater to a maximum of:
• 874 series 50°C
• 876 series 50°C
regardless of the preset outlet temperature setting of the water heater.
The installation of a Kitchen controller will allow a maximum temperature setting of:
• 874 series 60°C – AU 55°C – NZ
• 876 series 50°C
regardless of the preset outlet temperature setting of the water heater.
If there is no controller installed, the water heater defaults to the preset outlet temperature setting. This may
be up to:
• 874 series 75°C
• 876 series 50°C
Refer to “How Hot Should The Water Be?” on page 10.
On a building fitted with a temperature limiting device such as a tempering valve and where an 874 series
water heater is installed without a separate untempered hot water line to the kitchen, laundry or other non-
ablution area, although the Kitchen controller will be able to display temperatures above 50°C and the water
leaving the water heater will be at the set temperature, the maximum water temperature which can be delivered
to the hot water outlets in these locations is determined by the temperature setting of the temperature limiting
device. This is usually 50°C.
On a building fitted with a temperature limiting device set to 50°C, to enable the delivery of water temperatures
above 50°C to the kitchen, laundry or other non-ablution area, separate untempered pipe work must be
installed from the water heater to the hot water outlets in these locations.
TEMPERATURE CONTROL – STANDARD
19
TEMPERATURE ADJUSTMENT – STANDARD CONTROLLER
• A controller must be on and have priority to be able to adjust the temperature setting.
• The temperature adjustment is made by pressing the up () button or down () button.
• The maximum temperature setting for the controllers are:
Kitchen
Bathroom
874 series
60°C – AU, 55°C – NZ
50°C
876 series
50°C
50°C
• Each press of the up () button will increase the temperature setting by one increment.
• Pressing and holding the up () button will scroll the temperature setting up to a maximum 43°C if there
is hot water flowing or 45°C if there is no hot water flowing.
• From the 45°C setting, the up () button must be pressed once for each increase in temperature
increment.
• The temperature setting cannot be increased above 43°C whilst hot water is flowing.
• The minimum temperature setting for each type of controller is 37°C.
• Each press of the down () button will decrease the temperature setting by one temperature increment.
• Pressing and holding the down () button will scroll down the temperature setting.
• The temperature setting can be decreased from any temperature setting whether the hot water is flowing
or not.
TEMPERATURE CONTROL – STANDARD
20
KITCHEN CONTROLLER – STANDARD
The Kitchen controller allows the user to select the temperature setting for the hot water to be used in the
kitchen and laundry. It has a minimum temperature setting of 37°C and a maximum temperature setting of:
• 874 series 60°C – AU 55°C – NZ
• 876 series 50°C
The Kitchen controller does not have priority if a Bathroom controller is on.
Notes on the Kitchen controller:
• The controller cannot be turned on whilst a hot tap is open.
• The Kitchen controller must be on and have priority in order to adjust the temperature setting on the
Kitchen controller.
• The Bathroom controller(s) can be turned off from the Kitchen controller.
◼ Press and hold the on / off ( ) button on the Kitchen controller for three seconds.
This turns off all the controllers and the displays go blank.
If hot water is flowing from a hot tap, it will go cold.
Kitchen Controller
in use
priority
X 10L
88
°C
Rheem
Check hot water temperature before use
K
in use
priority
X 10L
°C
TEMPERATURE CONTROL – STANDARD
21
To operate the Kitchen controller:
1. Turn off the Bathroom controller(s)
◼ If a temperature setting is displayed and the priority light is not glowing, it is necessary to turn off the
Bathroom controller(s) to gain priority.
◼ Refer to the notes on the Kitchen controller on page 20.
2. Turn on the Kitchen controller
◼ Press the on / off ( ) button.
The on / off operating light and the priority light will both
glow.
The previous Kitchen controller temperature setting will
be displayed on the temperature display panel.
3. Select the temperature setting
◼ Press the up () button or down () button.
◼ Refer to “Temperature Adjustment – Standard
Controller” on page 19.
The selected temperature setting will be displayed on all
controllers.
4. Open the hot tap.
The in use light will glow on all controllers.
5. Close the hot tap.
The in use light will go out on all controllers, if no other hot
tap is open.
6. Turn off the Kitchen controller
◼ Press the on / off ( ) button.
The priority light and on / off operating light will go out
and the temperature display will go blank.
Important: Turn off the Kitchen controller after hot water usage
is finished in the kitchen and / or laundry. Refer to Important note
for Bathroom controllers on page 22.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
50
°C
in use
priority
X 10L
55
°C
in use
priority
X 10L
55
°C
in use
priority
X 10L
55
°C
in use
priority
X 10L
°C
TEMPERATURE CONTROL – STANDARD
22
BATHROOM CONTROLLERS – STANDARD
The Bathroom controller(s) allows the user to select the temperature setting for the hot water to be used in the
bathroom. They have a minimum temperature setting of 37°C and a maximum temperature setting of:
• 874 series 50°C
• 876 series 50°C
The Bathroom controllers operate in tandem. Whenever an operation is selected on one Bathroom controller,
it is also set on the other Bathroom controller. The Bathroom controllers automatically have priority if they are
on.
Important: It is important to turn on the Bathroom controller before opening a hot tap in the bathroom (priority
is automatically gained). If the Bathroom controller is not on and the Kitchen controller is on (has priority), then
it is possible to receive water at a temperature higher than expected from a hot tap in the bathroom. This
temperature could be up to:
• 874 series 50°C if a temperature limiting device is installed in the hot pipe to the bathroom
or up to 60°C – AU or 55°C – NZ if a temperature limiting device is not
installed.
• 876 series 50°C
Notes on the Bathroom controllers:
• The controller cannot be turned on whilst a hot tap is open.
• When a Bathroom controller is turned on, it gains priority from the Kitchen controller.
• The Bathroom controller must be on in order to adjust the temperature setting on the Bathroom controller.
• The Kitchen controller can be turned off from a Bathroom controller.
◼ Press and hold the on / off ( ) button on a Bathroom controller for three seconds.
This turns off all the controllers and the displays go blank.
If hot water is flowing from a hot tap, it will go cold.
• Warning: It is advised to leave the Bathroom controller on after hot water usage is finished in the
bathroom. Turning off a controller in one bathroom will also turn off the controller in the other
bathroom. The Kitchen controller will gain priority if it is on and the temperature setting can be up to:
◼ 874 series 60°C – AU 55°C – NZ
◼ 876 series 50°C
If a hot tap is open in another bathroom, the water
will be delivered at:
◼ For an 874 series model – up to 50°C if a
temperature limiting device is installed in the hot
pipe to the bathroom or up to 60°C – AU or 55°C
– NZ if a temperature limiting device is not
installed.
◼ For an 876 series model – up to 50°C.
in use
priority
X 10L
88
°C
Bathroom Controller
Check hot water temperature before use
Rheem
B1
in use
priority
°C
TEMPERATURE CONTROL – STANDARD
23
To operate a Bathroom controller:
1. Turn off the Kitchen controller
◼ If a temperature setting is displayed and the priority light is not glowing, it is advised to turn off the
Kitchen controller.
Refer to the notes on the Bathroom controllers on page 22.
2. Turn on the Bathroom controller
◼ Press the on / off ( ) button.
The on / off operating light and the priority light will both
glow.
The temperature setting of 40°C will be displayed on the
temperature display panel.
3. Select the temperature setting
◼ Press the up () button or down () button.
◼ Refer to “Temperature Adjustment – Standard Controller”
on page 19.
The selected temperature setting will be displayed on all
controllers.
4. Open the hot tap
The in use light will glow on all controllers.
5. Close the hot tap
The in use light will go out on all controllers, if no other hot tap
is open.
It is advised not to turn off the Bathroom controller(s).
◼ Refer to the warning in the notes on page 22.
in use
priority
X 10L
88
°C
in use
priority
40
°C
in use
priority
42
°C
in use
priority
42
°C
in use
priority
42
°C
TEMPERATURE CONTROL – STANDARD
24
WATER VOLUME FUNCTION
The water volume function is designed to warn by an alarm (beeping sound), that a certain volume of water
has been delivered from the water heater. It does not stop either the flow of or the heating of water. This
function is useful if a bath is being filled, or measuring the water consumed by the use of a shower.
The water volume function can only be set by the Kitchen controller. Refer to the notes on the water volume
function on page 25.
To operate the water volume alarm:
1. Turn on the water volume function
◼ Press the water volume ( ) button.
The water volume operating light will glow.
The current set water volume (in litres divided by 10) will
be displayed and the x 10L indicator will also glow.
E.g. the factory preset water volume of 180 litres is shown
as 18 x 10L.
2. Adjust the water volume setting (if necessary)
◼ To adjust the water volume setting, press the
up () button to increase the water volume or the
down () button to decrease the water volume.
Each press of the up () button or down () button will
change the water volume setting by 10 litres.
Pressing the up () button or down () button
continuously will scroll the water volume setting.
Fifteen seconds after the water volume has been
selected, the water volume operating light will start to
flash and the selected water volume is set.
The water volume operating light will continue to flash
until the alarm sounds.
A maximum of 500 litres (50 and x 10L displayed) and a
minimum of 10 litres (1 and x 10L displayed) can be set
with the water volume function.
3. Set the water temperature
◼ Turn on the controller for the room where the hot water is
to be used.
◼ Gain priority (if using the Kitchen controller).
◼ Select the temperature setting.
4. Open the hot tap
The in use light will glow on all controllers.
Measurement of the water flow at the water heater will
commence when a hot tap is open and the water volume
operating light is flashing.
The alarm will sound when the set volume of water has passed
through the water heater.
in use
priority
X 10L
88
°C
in use
priority
18
°C
X 10L
in use
priority
15
°C
X 10L
in use
priority
4 2
°C
in use
priority
42
°C
TEMPERATURE CONTROL – STANDARD
25
5. Turn off the alarm
◼ Press the water volume ( ) button to turn off the alarm.
The water volume operating light goes out and 0 x 10L is
displayed momentarily on the controller.
The temperature setting of the controller with priority is
then displayed.
6. Close the hot tap
If it is a Bathroom controller which is in use and has priority,
then it is advised to leave the controller on.
◼ Refer to the warning in the notes on page 22.
If it is the Kitchen controller which is in use and has priority,
then it is advised to turn the controller off.
◼ Refer to Important note for Bathroom controllers on
page 22.
Notes on the water volume function:
• The water volume can only be set by the Kitchen controller.
• The Kitchen controller does not require priority nor to be on in order to set the water volume function.
• The water volume function can be set whilst a hot tap is open.
• The water volume alarm will only sound from the Kitchen controller.
• The water volume alarm will still sound if the Kitchen controller has been silenced (refer to “Silencing A
Controller” on page 17).
• The factory preset water volume is 180 litres.
• If a hot tap is not opened for one hour after the new water volume has been set, then the setting will be
automatically cancelled. The water volume resets to the previously set water volume (or the factory preset
water volume if no water volume has previously been set).
• To display the remaining water volume while water is being drawn, press the water volume ( ) button.
After a few seconds, the display returns to the temperature setting.
• To turn off the water volume function before the alarm sounds, press the water volume ( ) button twice.
• The water volume is measured as the water flows through the water heater. Therefore if more than one
hot tap is open, the alarm will respond to the total water volume drawn from all taps and the expected
water volume from the first tap will be decreased.
• If the hot tap is closed before the set water volume flows through the water heater and the water volume
( ) button is left on, then the alarm will sound when the remaining water volume is consumed during a
later operation. To prevent the alarm from sounding, press the water volume ( ) button twice to turn it
off.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
42
°C
in use
priority
42
°C
26
TEMPERATURE CONTROL – DELUXE
DELUXE CONTROLLER FUNCTIONS
If one or more Deluxe controllers are installed, at least one must be on or the Bath Fill function activated for
the water heater to operate. If all Deluxe controllers and the Bath Fill function are off, the water heater will only
deliver cold water.
on / off ( ) button – The on / off ( ) button must be pressed once to turn on the Deluxe controller. A Deluxe
controller cannot be turned on if water is flowing from a hot tap.
To turn off a Deluxe controller, press the on / off ( ) button once. A Deluxe controller
can be turned off whilst water is flowing.
on / off operating light – The on / off operating light on the on / off ( ) button will glow when the Deluxe
controller is turned on.
The light will go out when the Deluxe controller is turned off.
PRIORITY light – The PRIORITY light will glow on a Deluxe controller when the controller has priority.
The Bathroom Deluxe controller(s), if they are turned on, have priority over the Kitchen
Deluxe controller.
PRIORITY means that particular Deluxe controller has control of the water heater
temperature setting. The water temperature setting can only be adjusted by a Deluxe
controller that has priority and is displaying the PRIORITY light.
operating light – The operating light will glow on all Deluxe controllers, whether they are on or off, when
hot water is flowing, regardless of which Deluxe controller has priority.
temperature display panel – The current temperature setting is displayed in °C on all Deluxe controllers
(whether hot water is flowing or not), when any Deluxe controller is on. If all Deluxe
controllers are off, the display remains blank.
up () button – The up () button increases the water temperature setting (refer to “Temperature
Adjustment – Deluxe Controllers” on page 31).
down () button – The down () button decreases the water temperature setting (refer to “Temperature
Adjustment – Deluxe Controllers” on page 31).
assistance call ( ) button – Pressing this button sounds an alert message on all Deluxe controllers, indicating
that assistance is required in the room from which the assistance call ( ) button was
activated.
speaker – The audio of the voice prompts and chimes is emitted from the speaker.
bath fill ( ) button – The bath fill ( ) button must be pressed once to turn on the Bath Fill function.
When the Bath Fill function is turned on, the last selected bath fill water volume in litres
will be displayed in the bath fill water volume display panel and the last selected bath fill
temperature in °C will be displayed in the temperature display panel.
The bath fill water volume and temperature can be adjusted by using the BATH FILL
VOLUME and BATH FILL TEMPERATURE buttons located behind the hinged panel on
the lower half of the Deluxe controller (refer to “Bath-Fill Function” on page 36).
To turn off the Bath Fill function, press the bath fill ( ) button.
bath fill operating light – The bath fill operating light on the bath fill ( ) button will glow when the bath fill
( ) button is pressed and the Bath Fill function is turned on.
The light will flash when the Bath Fill function is complete but before the Bath Fill
function has been turned off.
The light will go out when the bath fill ( ) button is pressed and the Bath Fill function
is turned off.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
BATH (l)
°C
0
BATH (l)
°C
0
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
TEMPERATURE CONTROL – DELUXE
27
bath fill water volume display panel – The selected bath fill water volume is displayed in litres on all Deluxe
controllers.
The selected bath fill water volume is displayed whenever the Bath Fill function is on
(refer to “Bath-Fill Function” on page 36) or when the bath fill water volume is being
adjusted and the Bath Fill function is off.
If the bath fill water volume is being adjusted and the Bath Fill function is off, then the
bath fill water volume display panel goes blank three (3) seconds after a BATH FILL
VOLUME button is last pressed.
At other times, if the Bath Fill function is off, the bath fill water volume display panel
remains blank.
bath fill indicator light – this light in the display panel will glow when the bath fill water volume is displayed.
BATH FILL TEMPERATURE up () button – The up () button increases the bath fill water temperature
setting (refer to “Temperature Adjustment – Deluxe Controllers” on page 31 and to
“Bath-Fill Function” on page 36).
BATH FILL TEMPERATURE down () button – The down () button decreases the bath fill water
temperature setting (refer to “Temperature Adjustment – Deluxe Controllers” on page 31
and to “Bath-Fill Function” on page 36).
BATH FILL VOLUME up () button – The up () button increases the bath fill water volume setting in
increments of 10 litres up to 500 litres. A further setting of 990 litres can be selected.
BATH FILL VOLUME down () button – The down () button decreases the bath fill water volume setting
from 990 litres to 500 litres and in increments of 10 litres from 500 litres down to
10 litres.
DELUXE CONTROLLER
PRIORITY
BATH (l)
°C
2 3 0
42
Open
hot tap
4.
Adjust
Temperature
3.
Hot Water
1.
Press
PRIORITY
Light on
2.
Bath Fill
1.
2.
Bath
Water
Volume
Bath
Fill
Temp
Set Bath Fill
Water Volume
and Temperature
Open
hot tap
4.
Bath Fill
completed
(automatic)
Bath Fill Button
(Red light flashes)
5.
6.
Close
hot tap
3.
Press Bath
Fill Button
(Red light on)
7.
Press Bath
Fill Button
(Red light off)
K
BATH FILL
VOLUME
BATH FILL
TEMPERATURE
BATH FILL
VOLUME
up () button
bath fill
button
assistance call
button
bath fill
operating light
Deluxe controller type
K = Kitchen
B1 = Bathroom 1
B2 = Bathroom 2
brief Deluxe controller
operating instructions
Bath Fill function and
Hot Water mode
BATH FILL
TEMPERATURE
down () button
BATH FILL
TEMPERATURE
up () button
on / off
button
on / off
operating light
operating
light
bath fill water volume
display panel
bath fill
indicator light
up ()
button
down ()
button
PRIORITY
light
temperature
display panel
speaker
BATH FILL
VOLUME
down () button
TEMPERATURE CONTROL – DELUXE
28
VOICE PROMPT AND OPERATING TONE
The Deluxe controllers have a series of voice prompts and operating tones which sound during certain
operations.
The voice prompts and operating tones sound from all Deluxe controllers, regardless of which Deluxe controller
is being operated at the time.
Voice Prompt
The voice prompts are:
• When either the up () button or BATH FILL TEMPERATURE up () button is pressed
“hot water temperature has been increased”
• When either the down () button or BATH FILL TEMPERATURE down () button is pressed
“hot water temperature has been decreased”
• When the BATH FILL VOLUME up () button is pressed
“Caution, bath fill water volume has been increased, bath may overflow”
• When the BATH FILL VOLUME down () button is pressed
“bath fill water volume has been decreased”
• When the bath fill ( ) button is pressed to turn on the Bath Fill function
“please set bath water volume and bath temperature, then open the hot water tap”
• When the set bath fill water volume has been delivered from the water heater during the Bath Fill function
“the bath is ready, please turn off the hot water tap and press the bath fill ( ) button to finish”
• When the bath fill ( ) button is pressed to halt the Bath Fill function before it is complete
“bath filling has been stopped, please turn off the hot water tap and press the bath fill ( ) button to
finish”
• When the bath fill ( ) button is pressed to turn the Bath Fill function off and the hot tap has not been
turned off
“please ensure the bath hot water tap is turned off”
• When the Deluxe controllers have been turned off during the Bath Fill function
“bath filling has been stopped”
• When the assistance call ( ) button is pressed
“assistance required, assistance required”
Operating Tone
The operating chime will sound when the temperature adjustment up () button or down () button is pressed
and the voice prompt is not speaking.
The operating beep will sound for each change in temperature increment when a BATH FILL TEMPERATURE
adjustment button is pressed or scrolled, whether the voice prompt is speaking or not.
The operating beep will sound for each change in volume increment when a BATH FILL VOLUME adjustment
button is pressed or scrolled and the voice prompt is not speaking.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
BATH (l)
°C
0
TEMPERATURE CONTROL – DELUXE
29
Adjusting the Volume of the Voice Prompt and Operating Tone
The volume of the voice prompt and the operating tone can be adjusted to a level comfortable for you. The
volume of the voice prompt and the operating tone can be adjusted independently of each other. The volume
levels on a Deluxe controller are adjusted independently of another Deluxe controller.
The voice prompt and / or operating tone can also be turned off on an individual or all Deluxe controllers so
they do not sound at all.
The factory default volume setting of both the voice prompt and operating tone is medium [med]. If there is an
interruption to the water heater power supply, the volume of both the voice prompt and operating tone returns
to the default setting.
When adjusting the volume levels, the operating tone volume level is indicated by a chime, followed by the
voice prompt volume level which is indicated by two beeps. If during the volume setting procedure only the
chime is audible, this indicates the voice prompt is off. If during the volume setting procedure only the two
beeps is audible, this indicates the operating tone is off.
To adjust or turn off the volume for the voice prompt and operating tone:
• Turn off all Deluxe controllers.
• Press and hold the up () button, then within four (4) seconds press the on / off ( ) button.
Each press of the on / off ( ) button will change the voice prompt and operating tone in the following
sequence:
◼ operating tone [MAX], voice prompt [OFF]
◼ operating tone [MIN], voice prompt [MIN]
◼ operating tone [MIN], voice prompt [OFF]
◼ operating tone [OFF], voice prompt [OFF]
◼ operating tone [MAX], voice prompt [MAX]
◼ operating tone [MED], voice prompt [OFF]
◼ operating tone [MED], voice prompt [MED]
This order then repeats.
Note: If the on / off ( ) button is not pressed within four (4) seconds of the up () button being pressed,
“CL” will start flashing on the temperature display panel. If this occurs, release the up () button and
recommence the procedure.
ASSISTANCE CALL FUNCTION
A Deluxe controller has an assistance call ( ) button. Should assistance be required, such as when in the
bathroom, a voice prompt will sound on all Deluxe controllers to notify others that assistance is required.
The Deluxe controller does not have to be on for the assistance call function to be activated and the function
can be activated during any operation.
To Call for Assistance
To operate the assistance call function:
1. Press the assistance call ( ) button.
The voice prompt will sound on all Deluxe controllers,
“assistance required, assistance required”
The red light in the assistance call ( ) button will glow on
all Deluxe controllers for the duration of the voice prompt.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
BATH (l)
°C
0
BATH (l)
°C
0
BATH (l)
°C
0
“assistance required,
assistance required”
BATH (l)
°C
BATH (l)
°C
TEMPERATURE CONTROL – DELUXE
30
TEMPERATURE SETTINGS – DELUXE CONTROLLERS
The temperature settings of each type of Deluxe controller are:
• Bathroom 1 & 2 Deluxe 37°C to 48°C* (in 1°C increments), 50°C
• Kitchen Deluxe 37°C to 48°C* (in 1°C increments), 50°C**, 55°C***, 60°C
* limited to 48°C when the Bath Fill function is set with 874 and 876 series models.
** limited to 50°C on an 876 series model.
*** NZ – limited to 55°C.
Temperature settings
37
38
39
40
41
42
43
44
45
46
47
48
50
55
60
warm
average hot shower
hot
very hot
The installation of a Bathroom Deluxe controller(s) only (i.e. no Kitchen Deluxe controller) limits the
temperature setting of the water heater to a maximum of:
• 874 series 50°C
• 876 series 50°C
regardless of the preset outlet temperature setting of the water heater.
The installation of a Kitchen Deluxe controller will allow a maximum temperature setting of:
• 874 series 60°C – AU 55°C – NZ
• 876 series 50°C
regardless of the preset outlet temperature setting of the water heater.
If there is no controller installed, the water heater defaults to the preset outlet temperature setting. This may
be up to:
• 874 series 75°C
• 876 series 50°C
Refer to “How Hot Should The Water Be?” on page 10.
On a building fitted with a temperature limiting device such as a tempering valve and where an 874 series
water heater is installed without a separate untempered hot water line to the kitchen, laundry or other non-
ablution area, although the Kitchen Deluxe controller will be able to display temperatures above 50°C and the
water leaving the water heater will be at the set temperature, the maximum water temperature which can be
delivered to the hot water outlets in these locations is determined by the temperature setting of the temperature
limiting device. This is usually 50°C.
On a building fitted with a temperature limiting device set to 50°C, to enable the delivery of water temperatures
above 50°C to the kitchen, laundry or other non-ablution area, separate untempered pipe work must be
installed from the water heater to the hot water outlets in these locations.
TEMPERATURE CONTROL – DELUXE
31
TEMPERATURE ADJUSTMENT – DELUXE CONTROLLERS
• A controller must be on with the PRIORITY indicator displayed to be able to adjust the temperature setting.
• The temperature adjustment is made by pressing the up () button or down () button.
• The minimum temperature setting for each type of controller is 37°C.
• The maximum temperature setting for the controllers are:
Kitchen
Bathroom
874 series
60°C – AU, 55°C – NZ
50°C
876 series
50°C
50°C
• Each press of the up () button will increase the temperature setting by one increment.
• Pressing and holding the up () button will scroll the temperature setting up to a maximum 43°C if there
is hot water flowing or 45°C if there is no hot water flowing.
• From the 45°C setting, the up () button must be pressed once for each increase in temperature
increment.
• The temperature setting cannot be increased above 43°C whilst hot water is flowing.
• Each press of the down () button will decrease the temperature setting by one temperature increment.
• Pressing and holding the down () button will scroll down the temperature setting.
• The temperature setting can be decreased from any temperature setting whether the hot water is flowing
or not.
Note: A Deluxe controller sounds a double beep at the 42°C temperature setting, if the voice prompt is not
speaking, when either the up () button or down () button has been pressed. The double beep does not
sound at the 42°C temperature setting when the BATH FILL TEMPERATURE up () button or BATH FILL
TEMPERATURE down () button is pressed.
TEMPERATURE CONTROL – DELUXE
32
KITCHEN CONTROLLER – DELUXE
The Kitchen Deluxe controller allows the user to select the temperature setting for the hot water to be used in
the kitchen and laundry. It has a minimum temperature setting of 37°C and a maximum temperature setting
of:
• 874 series 60°C – AU 55°C – NZ
• 876 series 50°C
The Kitchen Deluxe controller does not have priority (PRIORITY light is off) if a Bathroom Deluxe controller is
on.
Notes on the Kitchen Deluxe controller:
• The Deluxe controller cannot be turned on whilst a hot tap is open.
• The Kitchen Deluxe controller must be on and have priority (PRIORITY light glows) in order to adjust the
temperature setting on the Kitchen Deluxe controller.
• The Bathroom Deluxe controller(s) can be turned off from the Kitchen Deluxe controller.
Press and hold the on / off ( ) button on the Kitchen Deluxe controller for three seconds. This turns off all
the Deluxe controllers, including the Bath Fill function if it is on, the displays go blank and the lights go
out. If hot water is flowing from a hot tap, it will go cold.
Kitchen Deluxe Controller
in use
priority
X 10L
88
°C
Rheem
°C
BATH (l)
TEMPERATURE CONTROL – DELUXE
33
To operate the Kitchen Deluxe controller:
1. Turn off the Bathroom Deluxe controller(s)
◼ If a temperature setting is displayed and the
PRIORITY light is not glowing, it is necessary to turn
off the Bathroom Deluxe controller(s) to gain priority.
◼ Refer to the notes on the Kitchen Deluxe controller
on page 32.
2. Turn on the Kitchen Deluxe controller
◼ Press the on / off ( ) button.
The on / off operating light and the PRIORITY light
will both glow.
The previous Kitchen Deluxe controller temperature
setting will be displayed on the temperature display
panel.
3. Select the temperature setting
◼ Press the up () button or down () button.
When the up () button is pressed, the voice prompt
will sound;
“hot water temperature has been increased”
When the down () button is pressed, the voice
prompt will sound;
“hot water temperature has been decreased”
◼ Refer to “Temperature Adjustment – Deluxe
Controllers” on page 31.
The selected temperature setting will be displayed on
all Deluxe controllers.
4. Open the hot tap.
The operating light will glow on all Deluxe controllers.
5. Close the hot tap.
The operating light will go out on all Deluxe controllers, if
no other hot tap is open.
6. Turn off the Kitchen Deluxe controller
◼ Press the on / off ( ) button.
The PRIORITY light and the on / off operating light
will go out and the temperature display panel will go
blank.
Important: Turn off the Kitchen Deluxe controller after hot
water usage is finished in the kitchen and / or laundry. Refer
to Important note for Bathroom Deluxe controllers on
page 34.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
BATH (l)
°C
PRIORITY
50
BATH (l)
°C
PRIORITY
55
BATH (l)
“hot water temperature
has been increased”,
or
“hot water temperature
has been decreased”
°C
PRIORITY
°C
55
BATH (l)
PRIORITY
°C
55
BATH (l)
BATH (l)
°C
TEMPERATURE CONTROL – DELUXE
34
BATHROOM CONTROLLERS – DELUXE
The Bathroom Deluxe controller(s) allows the user to select the temperature setting for the hot water to be
used in the bathroom. They have a minimum temperature setting of 37°C and a maximum temperature setting
of:
• 874 series 50°C
• 876 series 50°C
The Bathroom Deluxe controllers operate in tandem. Whenever an operation is selected on one Bathroom
Deluxe controller, it is also set on the other Bathroom Deluxe controller. The Bathroom Deluxe controllers
automatically have priority (PRIORITY light glows) if they are on.
Important: It is important to turn on the Bathroom Deluxe controller before opening a hot tap in the bathroom
(priority is gained automatically and the PRIORITY light glows). If the Bathroom Deluxe controller is not on and
the Kitchen Deluxe controller is on (will have priority and the PRIORITY light glows), then it is possible to
receive water at a temperature higher than expected from a hot tap in the bathroom. This temperature could
be up to:
• 874 series 50°C if a temperature limiting device is installed in the hot pipe to the bathroom
or up to 60°C – AU or 55°C – NZ if a temperature limiting device is not
installed.
• 876 series 50°C
Notes on the Bathroom Deluxe controllers:
• The Deluxe controller cannot be turned on whilst a hot tap is open.
• When a Bathroom Deluxe controller is turned on, it gains priority (PRIORITY light glows) from the Kitchen
Deluxe controller.
• The Bathroom Deluxe controller must be on in order to adjust the temperature setting on the Bathroom
Deluxe controller.
• The Kitchen Deluxe controller can be turned off from a Bathroom Deluxe controller.
Press and hold the on / off ( ) button on the Bathroom Deluxe controller for three seconds. This turns off all
the Deluxe controllers, including the Bath Fill function if it is on, the displays go blank and the lights go out. If
hot water is flowing from a hot tap, it will go cold.
• Warning: It is advised to leave the Bathroom Deluxe controller on after hot water usage is finished in
the bathroom. Turning off a Bathroom Deluxe controller in one bathroom will also turn off the
Bathroom Deluxe controller in the other bathroom. The Kitchen Deluxe controller will gain priority
(PRIORITY light glows) if it is on and the temperature setting can be up to:
◼ 874 series 60°C – AU 55°C – NZ
◼ 876 series 50°C
If a hot tap is open in another bathroom, the water will be delivered at: for an 874 series model – up to 50°C if
a temperature limiting device is installed in the hot pipe to the bathroom or up to 60°C – AU or 55°C – NZ if a
temperature limiting device is not installed; or for an 876 series model – up to 50°C.
in use
priority
X 10L
88
°C
Rheem
°C
BATH (l)
Hot Water
1.
Press
PRIORITY
Light on
2.
Adjust
Temperature
3.
Open
hot tap
4.
Bath Fill
1.
2.
Bath
Water
Volume
Bath
Fill
Temp
Set Bath Fill
Water Volume
and Temperature
Open
hot tap
4.
6.
Close
hot tap
3.
Press Bath
Fill Button
(Red light on)
7.
Press Bath
Fill Button
(Red light off)
Bath Fill
completed
(automatic)
Bath Fill Button
(Red light flashes)
5.
B1
BATH FILL
TEMPERATURE
BATH FILL
VOLUME
Bathroom Deluxe
Controller
front cover
closed
front cover
open
TEMPERATURE CONTROL – DELUXE
35
To operate a Bathroom Deluxe controller:
1. Turn off the Kitchen Deluxe controller
◼ If a temperature setting is displayed and the
PRIORITY and on / off operating lights are not
glowing, it is advised to turn off the Kitchen Deluxe
controller.
Refer to the notes on the Bathroom Deluxe
controllers on page 34.
2. Turn on the Bathroom Deluxe controller
◼ Press the on / off ( ) button.
The on / off operating light and the PRIORITY light
will both glow.
The temperature setting of 40°C will be displayed on
the temperature display panel.
3. Select the temperature setting
◼ Press the up () button or down () button.
When the up () button is pressed, the voice prompt
will sound;
“hot water temperature has been increased”
When the down () button is pressed, the voice
prompt will sound;
“hot water temperature has been decreased”
◼ Refer to “Temperature Adjustment – Deluxe
Controllers” on page 31.
The selected temperature setting will be displayed on
all Deluxe controllers.
4. Open the hot tap
The operating light will glow on all Deluxe controllers.
5. Close the hot tap
The operating light will go out on all Deluxe controllers, if
no other hot tap is open.
It is advised not to turn off the Bathroom Deluxe
controller(s).
◼ Refer to the warning in the notes on page 34.
in use
priority
X 10L
88
°C
BATH (l)
°C
°C
PRIORITY
4 0
BATH (l)
“hot water temperature
has been increased”,
or
“hot water temperature
has been decreased”
°C
PRIORITY
42
BATH (l)
PRIORITY
°C
42
BATH (l)
PRIORITY
°C
42
BATH (l)
TEMPERATURE CONTROL – DELUXE
36
BATH FILL FUNCTION
The Bath Fill function is designed to allow the water heater to deliver a selected volume of water at a selected
temperature. The Bath Fill function commences when the bath fill ( ) button is on and a hot tap is opened.
When the set volume has been delivered, the water flow from the water heater ceases and heating stops. It is
also useful for controlling the water volume used by a shower or other application.
Note: The bath level should be monitored periodically while this function is in use to avoid the possibility of the
bath overflowing. The Bath Fill function should be used with caution until you are familiar with its operation.
Warning: Baths should not be left unattended whenever young children are present. After using the
Bath Fill function, check the water temperature before entering a bath, to ensure it is suitable and will not cause
scald injury.
The Bath Fill function can be set and turned off at any of the Deluxe controllers. Refer to the notes on page 42.
Bath Fill Function – Brief Guide
This guide provides a brief instruction on the operating sequence of the Bath Fill function. It is recommended
to read the explanatory notes and become familiar with each step in the Bath Fill function. Refer to “Bath Fill
Function – Explanatory Notes” on page 38.
To operate the Bath Fill function:
1. Turn off all Deluxe controllers
◼ It is advised to turn off all Deluxe controller(s) before
activating the Bath Fill function.
Refer to the notes on the Bathroom Deluxe controllers on
page 34.
2. Pull down the front panel on the Deluxe controller.
The BATH FILL VOLUME and BATH FILL TEMPERATURE
up () and down () buttons will be exposed.
3. Set the Bath Fill temperature
◼ Press the BATH FILL TEMPERATURE up () button or the
BATH FILL TEMPERATURE down () button to select the
desired bath fill temperature.
◼ Refer to “Temperature Adjustment – Deluxe Controllers” on
page 31.
The selected temperature setting will be displayed on all
Deluxe controllers.
4. Set the bath fill water volume
◼ Press the BATH FILL VOLUME up () button or the
BATH FILL VOLUME down () button to select the desired
bath fill water volume. Each press will change the water
volume setting by 10 litres.
Pressing the BATH FILL VOLUME up () button or
BATH FILL VOLUME down () button continuously will
scroll the water volume setting.
A maximum volume of 990 litres and a minimum volume of
10 litres can be set. The volume changes in 10 litre
increments.
The selected bath fill water volume will be displayed and the
bath fill indicator light will glow on all Deluxe controllers.
in use
priority
X 10L
88
°C
BATH (l)
°C
K
BATH FILL
VOLUME
BATH FILL
TEMPERATURE
Hot Water
1.
Press
PRIORITY
Light on
2.
Adjust
Temperature
3.
Open
hot tap
4.
Bath Fill
1.
2.
Bath
Water
Volume
Bath
Fill
Temp
Set Bath Fill
Water Volume
and Temperature
Open
hot tap
4.
6.
Close
hot tap
3.
Press Bath
Fill Button
(Red light on)
7.
Press Bath
Fill Button
(Red light off)
Bath Fill
completed
(automatic)
Bath Fill Button
(Red light flashes)
5.
“hot water temperature
has been increased”,
or
“hot water temperature
has been decreased”
°C
4 0
BATH (l)
BATH (l)
°C
120
“caution, bath fill water volume has
been increased, bath may overflow”
or
“bath fill water volume has been
decreased”
TEMPERATURE CONTROL – DELUXE
37
5. Close the front panel on the Deluxe controller.
6. Turn on the Bath Fill function
◼ Press the bath fill ( ) button.
On all Deluxe controllers:
➢ The bath fill operating light will glow.
➢ The bath fill temperature setting will appear on
the temperature display panel.
➢ The bath fill water volume will appear on the
bath fill water volume display panel.
➢ The bath fill indicator light will glow.
7. Open the hot tap.
The operating light will glow on all Deluxe controllers.
Measurement of the water flow at the water heater will
commence when the hot tap is opened.
When the set volume of water has passed through the
water heater:
◼ Water flow from the hot tap will cease.
◼ The operating light will go out.
◼ The bath fill water volume display panel will show
0 litres.
◼ The temperature display will go blank.
◼ The bath fill operating light will commence to flash
◼ The voice prompt will sound;
“the bath is ready, please turn off the hot water tap
and press the bath fill ( ) button to finish”
8. Close the hot tap.
9. Turn off the Bath Fill function
◼ Press the bath fill ( ) button.
The bath fill operating light and bath fill indicator light
will go out.
The bath fill water volume display will go blank.
Note: If the hot tap has not been turned off, the voice
prompt will sound;
“please ensure the bath hot water tap is turned off”
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
Rheem
°C
BATH (l)
BATH (l)
°C
120
40
“please set bath water volume
and bath temperature, then
open the hot water tap”
BATH (l)
°C
120
40
“the bath is ready,
please turn off the hot water tap
and press the
bath fill (
) button to finish”
BATH (l)
°C
0
BATH (l)
°C
0
°C
BATH (l)
“please ensure the bath hot
water tap is turned off”
TEMPERATURE CONTROL – DELUXE
38
Bath Fill Function – Explanatory Notes
To operate the Bath Fill function:
1. Turn off all Deluxe controllers
◼ It is advised to turn off all Deluxe controller(s) before
activating the Bath Fill function.
Refer to the notes on the Bathroom Deluxe
controllers on page 34.
The Deluxe controllers do not need to be on to set the
bath fill temperature and bath fill water volume and to
turn on the Bath Fill function.
2. Pull down the front panel on the Deluxe controller.
The BATH FILL VOLUME and BATH FILL
TEMPERATURE up () and down () buttons will be
exposed.
3. Set the bath fill temperature
◼ Press the BATH FILL TEMPERATURE
up () button or the BATH FILL TEMPERATURE
down () button.
The first press of either the BATH FILL
TEMPERATURE up () button or the BATH FILL
TEMPERATURE down () button will bring up the
last selected bath fill temperature setting.
While the bath fill temperature is displayed, each
subsequent press of the BATH FILL
TEMPERATURE up () button or BATH FILL
TEMPERATURE down () button will change the
temperature setting.
Refer to “Temperature Adjustment – Deluxe
Controllers” on page 31.
When the BATH FILL TEMPERATURE
up () button is pressed and the temperature setting
is increased, the voice prompt will sound;
“hot water temperature has been increased”
When the BATH FILL TEMPERATURE down () button is pressed and the temperature setting is
decreased, the voice prompt will sound;
“hot water temperature has been decreased”
The selected temperature setting will be displayed in the temperature display panel and will be
displayed on all Deluxe controllers.
The temperature display panel will go blank 3 seconds after the last press of either of the bath fill
temperature adjustment buttons.
The bath fill temperature setting will be remembered when the bath fill ( ) button is pressed “on”.
in use
priority
X 10L
88
°C
°C
BATH (l)
Hot Water
PRIORITY
Light on
2.
1.
Press
Adjust
Temperature
3.
Open
hot tap
4.
Open
hot tap
4.
7.
Press Bath
Fill Button
(Red light off)
Bath Fill
1.
2.
Bath
Water
Volume
Bath
Fill
Temp
Set Bath Fill
Water Volume
and Temperature
3.
Press Bath
Fill Button
(Red light on)
6.
Close
hot tap
Bath Fill
completed
(automatic)
Fill Button
(Red light flashes)
5.
BATH FILL
VOLUME
BATH FILL
TEMPERATURE
B1
°C
40
BATH (l)
Hot Water
PRIORITY
Light on
2.
1.
Press
Adjust
Temperature
3.
Open
hot tap
4.
Open
hot tap
4.
7.
Press Bath
Fill Button
(Red light off)
Bath Fill
1.
2.
Bath
Water
Volume
Bath
Fill
Temp
Set Bath Fill
Water Volume
and Temperature
3.
Press Bath
Fill Button
(Red light on)
6.
Close
hot tap
Bath Fill
completed
(automatic)
Fill Button
(Red light flashes)
5.
BATH FILL
VOLUME
BATH FILL
TEMPERATURE
B1
“hot water
temperature
has been
increased”
or
“hot water
temperature
has been
decreased”
TEMPERATURE CONTROL – DELUXE
39
4. Set the bath fill water volume
◼ Press the BATH FILL VOLUME up () button or the
BATH FILL VOLUME down () button.
The first press of either the BATH FILL VOLUME
up () button or the BATH FILL VOLUME
down () button will display the last selected bath fill
water volume setting in the bath fill water volume
display panel and the bath fill indicator light will glow.
While the bath fill water volume is displayed, each
subsequent press of the BATH FILL VOLUME
up () button or BATH FILL VOLUME
down () button will change the water volume
setting by 10 litres.
When the BATH FILL VOLUME up () button is
pressed and the water volume setting is increased,
the voice prompt will sound;
“caution, bath fill water volume has been increased,
bath may overflow”
When the BATH FILL VOLUME down () button is pressed and the water volume setting is
decreased, the voice prompt will sound;
“bath fill water volume has been decreased”
Pressing the BATH FILL VOLUME up () button or BATH FILL VOLUME down () button
continuously will scroll the water volume setting.
A maximum volume of 990 litres and a minimum volume of 10 litres can be set. The maximum volume
of 990 litres is achieved in 10 litre increments up to 500 litres, then 990 litres is the next setting.
The selected bath fill water volume will be displayed and the bath fill indicator light will glow on all
Deluxe controllers.
The bath fill water volume display panel will go blank
and the bath fill indicator light will go out 3 seconds
after the last press of either of the volume adjustment
buttons.
The set volume will be remembered when the
bath fill ( ) button is next pressed “on”.
5. Close the front panel on the Deluxe controller.
6. Turn on the Bath Fill function
◼ Press the bath fill ( ) button.
On all Deluxe controllers:
➢ The bath fill operating light will glow.
➢ The bath fill temperature setting will appear on
the temperature display panel.
➢ The bath fill water volume will appear on the
bath fill water volume display panel.
➢ The bath fill indicator light will glow.
➢ The voice prompt will sound;
“please set bath water volume and bath
temperature, then open the hot water tap”
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
BATH (l)
°C
120
Hot Water
PRIORITY
Light on
2.
1.
Press
Adjust
Temperature
3.
Open
hot tap
4.
Open
hot tap
4.
7.
Press Bath
Fill Button
(Red light off)
Bath Fill
1.
2.
Bath
Water
Volume
Bath
Fill
Temp
Set Bath Fill
Water Volume
and Temperature
3.
Press Bath
Fill Button
(Red light on)
6.
Close
hot tap
Bath Fill
completed
(automatic)
Fill Button
(Red light flashes)
5.
BATH FILL
VOLUME
BATH FILL
TEMPERATURE
B1
“caution,
bath fill water
volume has been
increased,
bath may overflow”
or
“bath fill water
volume has been
decreased”
Rheem
°C
BATH (l)
Rheem
BATH (l)
°C
120
40
“please set
bath water volume
and
bath temperature,
then open the
hot water tap”
TEMPERATURE CONTROL – DELUXE
40
7. Open the hot tap.
The operating light will glow on all Deluxe controllers.
Measurement of the water flow at the water heater will
commence when the hot tap is opened.
Notes
◼ If a second hot tap is opened when the Bath Fill
function is turned on, the set bath fill water volume
expected from the first hot tap will be reduced by the
volume which flows through the second hot tap.
◼ The bath fill temperature setting and bath fill water
volume setting can also be adjusted whilst a hot tap
is open and the Bath Fill function is operating.
When the set volume of water has passed through the
water heater:
◼ Water flow from the hot tap will cease.
◼ The operating light will go out.
◼ The bath fill water volume display panel will show
0 litres.
◼ The temperature display will go blank.
◼ The bath fill operating light will commence to flash.
◼ The voice prompt will sound;
“the bath is ready, please turn off the hot water tap
and press the bath fill ( ) button to finish”
8. Close the hot tap.
9. Turn off the Bath Fill function
◼ Press the bath fill ( ) button.
The bath fill operating light and bath fill indicator light
will go out.
The bath fill water volume display will go blank.
Note: If the hot tap has not been turned off, the voice
prompt will sound;
“please ensure the bath hot water tap is turned off”
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
BATH (l)
°C
120
40
BATH (l)
°C
0
“the bath is ready,
please turn off the hot water tap
and press the
bath fill (
) button to finish”
BATH (l)
°C
0
°C
BATH (l)
“please ensure the bath hot
water tap is turned off”
TEMPERATURE CONTROL – DELUXE
41
Turning Off Bath Fill Function During Its Operation
The bath fill operation can be interrupted by pressing the bath fill ( ) button before completion of the bath fill
operation.
If it is necessary to turn off the Bath Fill function before the operation is complete, during Step 7:
• Press the bath fill ( ) button
At this first press of the bath fill ( ) button:
◼ Water flow from the hot tap will cease.
◼ The operating light will go out.
◼ The bath fill water volume display panel will show
0 litres.
◼ The temperature display will go blank.
◼ The bath fill operating light will flash.
◼ The voice prompt will sound;
“bath filling has been stopped, please turn off the hot
water tap and press the bath fill ( ) button to finish”
• Close the hot tap.
• Press the bath fill ( ) button again.
At this second press of the bath fill ( ) button:
◼ The bath fill operating light and bath fill indicator light
will go out.
◼ The bath fill water volume display will go blank.
◼ Note: If the hot tap has not been turned off, the voice
prompt will sound;
“please ensure the bath hot water tap is turned off”
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
BATH (l)
°C
0
“bath filling has been stopped,
please turn off the hot water tap
and press the
bath fill (
) button to finish”
BATH (l)
°C
0
°C
BATH (l)
“please ensure the bath hot
water tap is turned off”
TEMPERATURE CONTROL – DELUXE
42
Notes on the Bath Fill function:
• The Bath Fill function can be set, turned on and turned off at any of the Deluxe controllers.
• The Deluxe controllers do not require to have priority (PRIORITY light glowing) or be on in order to set the
bath fill water volume or bath fill temperature or to turn the bath fill ( ) button on.
• The bath fill ( ) button cannot be turned on whilst a hot tap is open.
• The bath fill water volume and the bath fill temperature settings can be adjusted whilst a hot tap is open.
• If a hot tap is not opened for six hours after the new bath fill water volume and bath fill temperature have
been set, whilst the bath fill ( ) button is on, the settings will be automatically cancelled and will reset
to the previous settings or to the factory default settings if no previous settings have been set.
• The factory default bath fill water volume setting is 180 litres.
• The factory default bath fill temperature setting is 40°C.
• The Bath Fill function will automatically have priority when the bath fill ( ) button is pressed and the
Bath Fill function is turned on. If the PRIORITY light is glowing on a Deluxe controller, it will go out. The
PRIORITY light on a Deluxe controller will not glow whenever the BATH Fill operating light is on.
• Whilst water is flowing from a hot tap during the bath fill operation (bath fill operating light is on), a Deluxe
controller cannot be turned on or off:
◼ if it is on, pressing the on / off ( ) button will not turn it off.
◼ if it is off, pressing the on / off ( ) button will not turn it on.
• Whilst there is no water flowing from a hot tap and the bath fill operating light is on, a Deluxe controller
can be turned on (on / off ( ) button glows), but it will not gain priority (PRIORITY light will not glow).
• Pressing the up () button or down () button above the on / off ( ) button during the bath fill operation
(bath fill operating light is on) will not adjust the temperature setting.
Important
• Ensure all hot taps are turned off after a bath fill operation is complete and before pressing the bath fill
( ) button “off”. Otherwise;
◼ Water will flow from the hot tap when the bath fill ( ) button is pressed “off”.
The water will be cold if all Deluxe controllers are off, or hot if a Deluxe controller has PRIORITY.
◼ The voice prompt will also sound;
“please ensure the bath hot water tap is turned off”.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
TEMPERATURE CONTROL – DELUXE
43
Opening a Second Hot Water Tap During Bath Fill Operation
• The bath fill water volume is measured as the water flows through the water heater. If more than one hot
tap is open, the Bath Fill function will measure the total water volume drawn from all taps and the expected
water volume from the first tap will be decreased.
◼ If the hot water supply should cease unexpectedly, check to see if the bath fill operating light is
flashing.
◼ If the bath fill operating light is flashing, this indicates the set bath fill water volume has been delivered
and the bath fill operation is complete.
◼ If further hot water is required for the application:
➢ Turn off the hot tap.
➢ Press the bath fill ( ) button to turn off the Bath Fill function.
➢ Recommence the Bath Fill procedure from Step 3, ensuring the water volume is adjusted to the
volume required to complete the application.
Early Completion of Bath Fill Operation
• If the hot tap is closed before the set water volume flows through the water heater and the bath fill ( )
button is left on, the Bath Fill function remains active for six hours.
◼ If during this time a hot tap is turned on, the bath fill operation continues until the remaining bath fill
water volume is consumed, then
The water flow will cease and the voice prompt will sound;
“the bath is ready, please turn off the hot water tap and press the bath fill ( ) button to finish”
➢ Close the hot tap.
➢ Press the bath fill ( ) button.
◼ To prevent the bath fill operation completing and interrupting the hot water supply, whilst the hot tap
is off, then
➢ press the bath fill ( ) button twice to turn it off.
The first press of the bath fill ( ) button causes the bath fill operating light to flash and the
voice prompt will sound;
“bath filling has been stopped, please turn off the hot water tap and press the bath fill ( ) button
to finish”
The second press of the bath fill ( ) button causes the bath fill operating light to go off.
Interrupting Bath Fill Operation
• The bath fill operation can be interrupted by:
◼ Pressing the bath fill ( ) button before completion of the bath fill operation.
Refer to “Turning Off Bath Fill Function During Its Operation” on page 41.
or by
◼ Pressing and holding the on / off ( ) button on any Deluxe controller for three seconds.
This turns off all the Deluxe controllers, including the Bath Fill function. The displays go blank and the
lights go out.
A voice prompt will sound;
“bath filling has been stopped”
Hot water flowing from a hot tap will go cold.
➢ Turn off the hot tap.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
TEMPERATURE CONTROL – DELUXE
44
Operation of the Bath Fill function whilst a Deluxe Controller has priority
It is recommended the Bath Fill function be set and operated with the Deluxe controllers turned off (refer to
Step 1 on page 38).
However, if a Deluxe controller has PRIORITY during the setting and operation of the Bath Fill function, then
the following additional events occur:
During Step 3, when the bath fill temperature is being set
• The temperature setting of the PRIORITY Deluxe controller
will display in the temperature display panel three seconds
after the BATH FILL TEMPERATURE button is last pressed.
When the Deluxe controller temperature setting is higher than
the bath fill temperature setting, the voice prompt will sound;
“hot water temperature has been increased”
When the Deluxe controller temperature setting is lower than
the bath fill temperature setting, the voice prompt will sound;
“hot water temperature has been decreased”
During Step 6, when the bath fill ( ) button is pressed to turn the Bath Fill function on
The Bath Fill function has priority when operating. When the bath fill ( ) button is pressed, the Bath Fill
function will gain priority and over-ride the settings of all Deluxe controllers if they are on.
• The PRIORITY light will go out if it is on.
• The bath fill temperature setting will replace the temperature
setting in the temperature display panel.
When the bath fill temperature setting is lower than the Deluxe
controller temperature setting, the voice prompt will sound;
“hot water temperature has been decreased”
When the bath fill temperature setting is higher than the
Deluxe controller temperature setting, the voice prompt will
sound;
“hot water temperature has been increased”
During Step 9, when the bath fill ( ) button is pressed to turn
the Bath Fill function off
• The PRIORITY light will glow on the Deluxe controller which
has priority.
• The temperature setting of the PRIORITY Deluxe controller
will display in the temperature display panel.
Notes
• If it is a Bathroom Deluxe controller which is in use and it is on, i.e. it has priority and the PRIORITY light
is glowing, then it is advised to leave the controller on.
Refer to the warning in the notes on page 34.
• If it is the Kitchen Deluxe controller which is in use and it is on, i.e. it has priority and the PRIORITY light
is glowing, then it is advised to turn the controller off.
Refer to Important note for Bathroom controllers on page 34.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
PRIORITY
°C
46
BATH (l)
“hot water temperature has
been increased”
or
“hot water temperature has
been decreased”
BATH (l)
°C
120
40
“hot water temperature has
been increased”
or
“hot water temperature has
been decreased”
PRIORITY
°C
46
BATH (l)
45
WATER SUPPLIES
This water heater must be installed in accordance with this advice to be covered by the Rheem
warranty.
This water heater is manufactured to suit the water conditions of most public reticulated water supplies.
However, there are some known water chemistries which can have detrimental effects on the water heater
and its operation and / or life expectancy. If you are unsure of your water chemistry, you may be able to obtain
information from your local water supply authority. This water heater should only be connected to a water
supply which complies with these guidelines for the Rheem warranty to apply.
CHANGE OF WATER SUPPLY
The changing or alternating from one water supply to another can have a detrimental effect on the operation
and / or life expectation of a heat exchanger in a continuous flow water heater.
Where there is a changeover from one water supply to another, e.g., a rainwater tank supply, bore water
supply, desalinated water supply, public reticulated water supply or water brought in from another supply, then
water chemistry information should be sought from the supplier or it should be tested to ensure the water
supply meets the requirements given in these guidelines for the Rheem warranty to apply.
SATURATION INDEX
The saturation index (SI) is used as a measure of the water’s corrosive or scaling properties. The saturation
index figures stated are calculated using a water temperature of 80°C.
In a corrosive water supply, the water can attack copper parts and cause them to fail. Where the saturation
index is less than –1.0, the water is very corrosive and the Rheem warranty does not apply to a copper heat
exchanger in a continuous flow water heater.
In a scaling water supply calcium carbonate is deposited out of the water onto any hot metallic surface. Where
the saturation index exceeds +0.80, the Rheem warranty does not apply to a copper heat exchanger in a
continuous flow water heater.
Water which is scaling may be treated with a water softening device to reduce the saturation index of the water.
Refer to the Saturation Index chart on page 45.
46
SAVE A SERVICE CALL
Check the items below before making a service call. You will be charged for attending to any condition or fault,
which is not related to manufacture or failure of a part (refer to “Terms of the Rheem Warranty” on page 4).
NO DISPLAY ON THE CONTROLLER
• Is the controller turned on?
Press the on / off ( ) button (refer to “Temperature Control” on pages 15 to 44).
• Is the water heater plugged in and the power outlet switched on?
• Is power available in the house?
Try using another electrical appliance.
COLD WATER FROM THE HOT TAP
• Is the controller turned on?
Press the on / off ( ) button (refer to “Temperature Control” on pages 15 to 44).
• Close the hot tap, wait 10 seconds and open the hot tap again.
• Is the hot tap open enough?
The burners will not light if the flow rate is less than 2.0 L / min.
• Is the water heater plugged in and the power outlet switched on?
• Is power available in the house?
Try using another electrical appliance.
• Is the isolation valve in the gas line open?
• Is there a gas supply to the rest of the house?
Try lighting another gas appliance.
• Has the gas line been purged of air after installation?
Refer to a plumber.
WATER IS TOO HOT OR NOT HOT ENOUGH
• Does the controller you are using have priority? (refer to “Temperature Control” on pages 15 to 44)
Note: For an 876 series water heater, 50°C is the maximum available temperature setting.
NO WATER FROM THE HOT TAP
No flow of water from the hot tap may indicate a restriction in or failure of the cold water supply to the water
heater. Check for water flow at other taps and that the cold water isolation valve (refer to page 61) is fully open.
REDUCED HOT WATER FLOW WHEN HEAT EXCHANGER IS COLD
At a cold start-up, i.e. when the water heater has not operated for some time (which is most often first thing in
the morning), the initial flow of hot water may be reduced for a period of 5-10 seconds while the heat exchanger
warms up. This is both an energy and water saving feature of this water heater. Once the heat exchanger
has warmed up the hot water flow will increase and remain at normal flow levels. This feature will only occur
at a cold start-up and not when the heat exchanger is already warm from a recent use of hot water.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
SAVE A SERVICE CALL
47
WATER FLOW FLUCTUATES
Too many taps in use at the same time may cause a decrease in the hot water flow from the taps. This can
also be evident if the water heater has been installed as an in-series gas booster to a solar water heater and
the solar heated water is at a low temperature.
• Are there several hot taps open, or are appliances such as a dishwasher or washing machine, in use at
the same time?
Ensure no more than two or three taps or appliances are on at the one time.
• Check the flow of hot water from each tap to see if one or more outlets are using more water than you
think.
Have a plumber install a flow control valve to each shower outlet, basin and sink to reduce water usage.
GAS BOOSTER OPERATING TOO FREQUENTLY
If the water heater is installed as an in-series gas booster to a solar water heater, you may find that the water
heater operates more frequently than expected. This will occur when the solar heated water temperature is
lower than 58°C, which may be experienced during periods of low solar energy gain or if there has been heavy
hot water usage. Factors to consider are:
• Hot tap not used recently
If a hot tap has not been used for a while, the water in the pipe work between the solar storage tank and
the in-series gas booster may have cooled down. The in-series gas booster will sense the cooler water
and this will cause the burners on the water heater to ignite and boost the water temperature when a hot
tap is first turned on. The burners will extinguish when solar heated water of 58°C or higher from the solar
storage tank reaches the in-series gas booster (refer also to “Fan Continues to Run after Water Heater
Operation Stops” on page 47).
• Insufficient sunlight
Insufficient sunlight due to cloudy weather during hotter months or low solar energy contribution in colder
months may mean the in-series gas booster operates more often.
• Collectors shaded
If trees or other objects shade the solar collectors or if the glass is dirty, the effectiveness of the solar
collectors will be greatly reduced. Have the trees trimmed or the solar collectors relocated if the obstruction
is permanent or clean the collector glass.
Ensure the glass on your solar collectors is free of dust, salt spray or any other matter, which may reduce
the effectiveness of the solar collectors. If the collector glass becomes dirty, hose down or if the solar
collectors are accessible, wash the collector glass with water and a soft brush when the solar collectors
are cool.
• Collector area is too small
For most installations, the number of solar collectors recommended in Rheem literature has been proven
to provide the required solar energy to meet the average family needs. However, in some circumstances,
it may be necessary to install an additional solar collector.
• Are you using more hot water than you think?
Is one outlet (especially the shower) using more hot water than you think?
Very often it is not realised the amount of hot water used, particularly when showering. Carefully review
the family’s hot water usage. As you have installed an energy saving appliance, energy saving should
also be practised in the home. Adjust your water usage pattern to take advantage of maximum solar gains.
Have a plumber install a flow control valve to each shower outlet, basin and sink to reduce water usage.
• Water heater size
Do you have the correct size water heater for your requirements?
The sizing guide in the sales literature and on the Rheem website (AU – www.rheem.com.au or NZ –
www.rheem.co.nz) suggests average sizes that may be needed.
FAN CONTINUES TO RUN AFTER WATER HEATER OPERATION STOPS
It is the normal operation of the water heater for the fan to continue running after heating of the water is finished.
The fan may run for up to six minutes after the burners extinguish, to prepare for the next ignition.
SAVE A SERVICE CALL
48
CLOUDS OF WHITE ‘VAPOUR’ FROM THE FLUE TERMINAL
During the heating cycle, it is not unusual to see water vapour clouds
steaming from the flue terminal, particularly on cold days. This is normal
operation of the water heater.
PRESSURE RELIEF VALVE DISCHARGING
A pressure relief valve is incorporated into the water heater controls.
This valve protects the water heater, by allowing water to escape, in the
event of excessive pressure build-up in the waterways.
• Normal operation
A small volume of water may discharge from the bottom of the water
heater when a hot tap is suddenly closed.
• Continuous dribble
A continuous dribble may indicate the water supply pressure is
above the design pressure for the water heater. If so, a pressure
limiting valve must be installed on the cold water supply pipe to the
water heater (refer to “Mains Water Supply” on page 51).
ERROR CODE
The water heater provides a diagnostic error code in the event of an interruption to its operation. The error
code is displayed on the controller(s) (if installed) and on the LED display on the front of the water heater as a
numerical value. If an error code appears:
• Close the hot tap, turn off the controller(s) and switch off the
electrical supply to the water heater.
• Check the gas isolation valve at the gas inlet to the water heater is
fully open.
• Wait 5 minutes, then switch on the electrical supply to the water
heater, turn on a controller and open a hot tap.
If the error code persists, take note of the numerical code, turn off the
hot tap and turn off the controller(s). Phone Rheem Service or their
nearest Accredited Service Agent / Centre to arrange for inspection.
HIGHER THAN EXPECTED GAS BILLS
Should you at any time, feel your gas bill is higher than expected, we suggest you check the following points:
• Is one outlet (especially the shower) using more hot water than you
think?
Carefully review the family’s hot water usage. Inexpensive flow
control valves can be easily fitted to the shower outlets to reduce
water usage.
• Is the in-series gas booster operating too frequently?
Refer to “Gas Booster Operating Too Frequently” on page 47.
• Has there been an increase in hot water usage?
An increase in hot water usage will result in an increase in water
heater operation.
• Has your water heating tariff rate been increased by your gas retailer since your previous bill?
IF YOU HAVE CHECKED ALL THE FOREGOING AND STILL BELIEVE YOU NEED ASSISTANCE, PHONE
RHEEM SERVICE OR THEIR NEAREST ACCREDITED SERVICE AGENT / CENTRE.
49
INSTALLATION – WATER HEATER
THIS WATER HEATER IS FOR OUTDOOR INSTALLATION ONLY.
THIS WATER HEATER IS NOT SUITABLE FOR POOL HEATING.
Check the water heater is suitable for the gas type available.
(refer to the rating label on the water heater)
INSTALLATION STANDARDS
The water heater must be installed:
• by a qualified person, and
• in accordance with the installation instructions, and
• in compliance with the Plumbing Code of Australia (PCA), Standards AS/NZS 3500.4 and
AS/NZS 5601.1, and all local codes and regulatory authority requirements,
◼ The Gas installations Standard AS/NZS 5601.1 places limitations on the location of a gas water heater
within a covered area. Refer to “Installation within a Covered Area” on page 51.
• in New Zealand also conforming to Clauses G11, G12 and H1 of the New Zealand Building Code.
874 series
Warning: This water heater may deliver water at high temperature. Refer to the Plumbing Code of
Australia, local requirements and these installation instructions to determine if additional delivery temperature
control is required. Refer to “Hot Water Delivery” on page 52.
876 series
This water heater delivers water not exceeding 50°C in accordance with AS 3498.
Warning: This water heater must only be installed in accordance with the acceptable plumbing
configurations specified in these installation instructions. Failure to do so may result in conditions where
delivery temperature control is inadequate. Refer to “Water Temperature Diagrams” on page 56.
All packaging materials must be removed from the water heater prior to its installation.
WATER HEATER APPLICATION
This water heater is designed for use in a single family domestic dwelling for the purpose of heating potable
water. Its use in an application other than this may shorten its life.
If this water heater is to be used where an uninterrupted hot water supply is necessary for the application or
business, then there should be back-up redundancy within the hot water system design. This should ensure
the continuity of hot water supply in the event that this water heater was to become inoperable for any reason.
We recommend you provide advice to the system owner about their needs and building back-up redundancy
into the hot water supply system.
The 874 series of water heater may be installed as an in-series gas booster to a solar water heater. For
information relating to the function and operation of the solar water heater, refer to the Owner’s Guide and
Installation Instructions supplied with the solar water heater.
Note: The 876 series water heater is marked “THIS APPLIANCE DELIVERS WATER NOT EXCEEDING 50°C
IN ACCORDANCE WITH AS 3498” on the front panel. This model;
• must not be installed as an in-series gas booster to a solar water heater, as water temperature greater
than 50°C can be delivered from the water heater contravening its compliance to AS 3498.
Note: Australian Standard AS 3498 and New Zealand Building Code Clause G12 requires that a water heater
provides the means to inhibit the growth of Legionella bacteria in potable water. When this water heater is
used as an in-series booster for a solar water heater it can satisfy these AS 3498 and Clause G12 requirements
provided it is energised, the booster preset outlet temperature setting is 70°C, and that a remote temperature
controller is not used.
INSTALLATION – WATER HEATER
50
WATER HEATER LOCATION
The water heater is suitable for outdoor installation only and should be installed close to the most frequently
used outlet and its position chosen with safety and service in mind. If this water heater is part of a solar water
heater system, it should also be installed close to the solar storage tank. Make sure people (particularly
children) will not touch the flue terminal. The flue terminal and air inlet must be clear of obstructions and
shrubbery.
Clearance must be allowed for servicing of the water heater. The water
heater must be accessible without the use of a ladder or scaffold. Make sure
the entire front panel can be removed for service. You must be able to read
the information on the rating plate. Remember you may have to take the
entire water heater out later for servicing.
This water heater must be installed vertically upright with the water, gas and
power connections on the underside, pointing toward the ground. The back
of the water heater can be either against a wall or supported by a frame.
Note: The water heater must be well secured to the wall or frame using two fasteners each at the top and
bottom of the unit (refer to page 57 for mounting hole positions and weight of the water heater). Use the screws
provided only if they are suitable for the wall or frame type. Otherwise select and use alternative fasteners
suitable for the application. The fasteners must be capable of bearing the full weight of the water heater so it
may not work loose nor impose any load on the gas and water pipe work connected to the water heater. Refer
to the fastener manufacturer’s information and recommendations for the type of fastener to use for the wall or
frame type and load bearing requirements.
Alternatively the water heater can be recessed into a wall (refer to “Recess Installation” on page 51).
For a single water heater installation, refer to the typical installation diagram on page 60.
For a dual water heater installation using the EZ Link system, refer to “EZ Link System Dual Installation” on
page 64 and the typical installation diagram on page 68.
The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or
where aerosol propellants are released. Remember the air may be safe to breathe, but when it goes through
a flame, chemical changes take place which may attack the water heater.
A secondary flue is not required. The water heater must not be installed indoors or in a confined space.
The water heater must be located to ensure that the location of the flue terminal complies with the requirements
of AS/NZS 5601.1. As a guide the following requirements are extracted from the Gas Installations Standard.
The distances are measured along the wall behind the water heater.
• At least 300 mm between the top of the flue terminal
and the eaves.
• At least 500 mm between the flue terminal and the
edge of any opening into the building, such as an
openable door or window, measured horizontally*.
• At least 1500 mm between the top of the flue terminal
and the edge of any opening into the building, such as
an openable window, measured vertically.
• At least 300 mm between the flue terminal and a return
wall or external corner, measured horizontally*.
• At least 1500 mm between the flue terminal and any
opening into a building, in the direction of the flue
discharge.
• At least 500 mm between the flue terminal and a fence, wall or other obstruction, in the direction of the
flue discharge.
Note: * If these horizontal distances cannot be achieved, AS/NZS 5601.1 states an equivalent horizontal
distance measured diagonally from the nearest discharge point of the flue terminal to the opening may be
deemed to comply. Check with the local regulator.
INSTALLATION – WATER HEATER
51
INSTALLATION WITHIN A COVERED AREA
The water heater must be located such that the installation meets the requirements of AS/NZS 5601.1. There
must be sufficient ventilation so the water heater has an adequate supply of combustion air and the flue
products are dispersed safely. It is the licensed installer’s responsibility to ensure the installation complies with
the relevant sections of the Gas installations Standard.
Installation of this water heater is permitted within a covered area open on at least two sides, if its flue terminal
is located to ensure a free flow of air across it is achieved.
AS/NZS 5601.1 also allows the installation of a continuous flow gas water heater within a covered area open
on one side only if:
• the flue terminal is within 500 mm of the opening and is discharging in the direction of the opening, and
• there is no other flue terminal, gas meter, electricity meter, fuse box or opening into the building along the
wall within the 500 mm distance, and
• the terminal is located to ensure a free flow of air across it is achieved.
Additional clearances to openings into the building or obstructions also apply, refer to AS/NZS 5601.1, Fig 6.2.
PIPE COVER
The pipe work to the water heater can be housed within a pipe cover. A pipe cover kit (Rheem
AU – Part 299425, NZ – Part 320116) is available for such an installation. Refer to the installation instructions
which accompany the pipe cover kit.
RECESS INSTALLATION
The water heater can be installed recessed into a wall. A recess box (Rheem AU – Part 299831,
NZ – Part 320316) is available for such an installation. Refer to the installation instructions which accompany
the recess box kit for information on its installation.
The rating plate on the side of the water heater should be moved to or the information on it, including the water
heater serial number, manufacture date and model number, indelibly copied onto either the front panel of the
water heater or to another position which is visible when the water heater is installed so the householder or
responsible officer can access the water heater details when required. An additional rating label is supplied
attached to the inside of the front cover of the water heater. This is for a service person to access the water
heater details when required.
MAINS WATER SUPPLY
Where the mains water supply pressure exceeds that shown in the table below, an approved pressure limiting
valve that does not have non-return valve characteristics (such as an RMC PSL series valve) is required and
should be fitted as shown in the water and gas connection detail diagram on page 61.
Model
27
Relief valve setting
1750 kPa
Maximum mains supply pressure
1000 kPa
Minimum mains supply pressure *
140 kPa
* minimum water supply pressure required to achieve the rated flow
and performance
Notes
• It is not recommended to install this water heater with a low pressure water supply.
• A minimum water supply pressure of 140 kPa is required to achieve the rated flow and performance of
the water heater.
• If this water heater is installed as an in-series gas booster for a solar water heater, the maximum water
supply pressure to the solar water heater, without an expansion control valve (ECV), is generally 800 kPa,
however it may be less than this for some models. Refer to the Owner’s Guide and Installation Instructions
supplied with the solar water heater for maximum mains supply pressure details.
• If sludge or foreign matter is present in the water supply, it is recommended a suitable filter be incorporated
in the cold water line to the water heater.
• This water heater is not suitable for connection to bore water or spring water unless a water treatment
device is fitted.
• Refer to “Water Supplies” on page 45 for further information on water chemistry.
INSTALLATION – WATER HEATER
52
HOT WATER DELIVERY
This water heater can deliver water at temperatures which can cause scalding.
876 series – 50°C Limited Outlet
An 876 series water heater delivers water not exceeding 50°C in accordance with AS 3498. The risk of scald
injury will be reduced.
There is no need to fit a temperature limiting device to satisfy the requirements of the Plumbing Code of
Australia, if an 876 series water heater is installed and serving an application where 50°C is the maximum
permissible hot water temperature at the outlet of a fixture or appliance used primarily for personal hygiene,
such as in a bathroom or ensuite.
874 series – Hot Water Outlet
Depending upon its preset outlet temperature setting, an 874 series water heater can deliver hot water at a
temperature up to 75°C when no temperature controller is installed and 60°C when a temperature controller is
installed. These temperatures are sufficiently hot to cause severe scalding. A model used as a booster to a
solar water heater can deliver hot water exceeding these temperatures. Water at these temperatures may be
plumbed to fixtures where water hotter than 50°C is allowed, such as the kitchen and laundry.
The installing plumber may have a legal obligation to ensure the installation of this water heater meets the
water temperature delivery requirements of the Plumbing Code of Australia and New Zealand Building Code
Clause G12 so that heated water delivered to fixtures and appliances used primarily for personal hygiene is at
a temperature which is unlikely to scald.
It is necessary and we recommend that a temperature limiting device be fitted between an 874 series water
heater and the fixtures and appliances used primarily for personal hygiene such as in a bathroom, ensuite,
public amenities or other ablution areas, to reduce the risk of scalding. The temperature limiting device must
be of a type suitable for use with a continuous flow gas water heater. Refer to the manufacturer’s specifications
of the temperature limiting device.
Where a temperature limiting device is installed adjacent to the water heater, the cold water line to the
temperature limiting device can be branched off the cold water line either before or after the isolation valve
and pressure limiting valve to the water heater.
If a pressure limiting valve is installed on the cold water line to the water heater and the cold water line to a
temperature limiting device branches off before this valve or from another cold water line in the premises, then
a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting device.
Two Temperature Zones Using a Temperature Limiting Device
Gas Booster for a Solar Water Heater
The temperature limiting device used with an 874 series in-series gas booster as part of a solar water heater
installation must be of a type suitable for use with both a continuous flow water heater and a solar water heater.
Refer to the manufacturer’s specifications of the temperature limiting device.
Warning: Temperature controllers must not be fitted to this water heater (874 series) if it is installed as
an in-series gas booster with a solar water heater system because water at a temperature much higher than
the controller setting can be delivered. If a solar water heater is installed to an existing water heater installation,
then all controllers must be disconnected and removed.
INSTALLATION – WATER HEATER
53
Where a temperature limiting device is installed adjacent to the in-series gas booster, the cold water line to the
temperature limiting device can be branched off the cold water line either before or after the isolation valve
and pressure limiting valve to the solar storage tank, but it MUST BE before the non-return valve prior to an
open circuit system. The cold water line to the temperature limiting device can be branched off the cold water
line either before or after the non-return valve prior to a closed circuit system. If an expansion control valve is
required, it must always be installed after the non-return valve and be the last valve prior to the solar storage
tank.
Warning: A non-return valve MUST BE installed on the cold water line to the solar storage tank AFTER
the cold water branch to a temperature limiting device prior to an open circuit system.
If a combination isolation valve and non-return valve (duo or trio valve) is installed on the cold water line to an
open circuit solar water heater and the cold water line to the temperature limiting device branches off after this
valve, then a second non-return valve must be installed between the cold water branch and the solar storage
tank.
If a pressure limiting valve is installed on the cold water line to the solar water heater and the cold water line
to a temperature limiting device branches off before this valve or from another cold water line in the premises,
then a pressure limiting valve of an equal pressure setting may be required prior to the temperature limiting
device.
Refer to the installation instructions supplied with the solar storage tank for further information on the
installation of the cold water valves in the cold supply pipework prior to the solar storage tank.
In-series Gas Booster as part of an Open Circuit Solar Water Heater Installation
Two Temperature Zones Using a Temperature Limiting Device
In-series Gas Booster as part of a Closed Circuit Solar Water Heater Installation
Two Temperature Zones Using a Temperature Limiting Device
to solar
storage tank
from solar
storage tank
from solar
storage tank
to solar
storage tank
INSTALLATION – WATER HEATER
54
CIRCULATED HOT WATER FLOW AND RETURN SYSTEM
A Rheem 874627 model continuous flow water heater can be installed as part of a circulated hot water flow
and return system in a building.
Notes
• the preset outlet temperature setting of the water heater must be set to at least 60°C – AU or 65°C – NZ.
In New Zealand an approved UV sterilisation or chlorine disinfection system may be used if the
temperature setting of the water heater is less than 65°C.
• the return water temperature to the water heater must not be less than 55°C – AU or 60°C – NZ.
If the water temperature decreases by more than 5°C due to heat loss from the ring main, the preset outlet
temperature setting of the water heater must be set to above 60°C – AU or 65°C – NZ to ensure the return
water temperature is not less than 55°C – AU or 60°C – NZ.
• temperature controllers should not be installed with this water heater as part of a circulated hot water flow
and return system, including when installed as part of an EZ Link System dual installation.
The circulator must be:
• sized and set to provide a minimum flow rate of 3.0 L/min through the recirculated hot water flow and
return system, and
• either thermostatically and / or timer controlled.
The circulator must not be set to operate continuously, i.e. 24 hours per day.
Warning: A Rheem 876 series continuous flow water heater must not be installed as part of a circulated
hot water flow and return system in a building.
Temperature Limiting Device
A temperature limiting device cannot be installed in circulated hot water flow and return pipe work. The
tempered water from a temperature limiting device cannot be circulated. Where a circulated hot water flow and
return system is required in a building, a temperature limiting device can only be installed on a dead leg,
branching off the circulated hot water flow and return pipe.
If circulated tempered water were to be returned back to the water heater, depending on the location of the
return line connection on the water supply line to the water heater, then either:
• water will be supplied to the cold water inlet of the temperature limiting device at a temperature exceeding
the maximum recommended water supply temperature, or
• when the hot taps are closed no water will be supplied to the cold water inlet of the temperature limiting
device whilst hot water will continue to be supplied to the hot water inlet of the temperature limiting device.
These conditions may result in either water at a temperature exceeding the requirements of AS/NZS 3500.4
being delivered to the hot water outlets in the ablution areas, or the device closing completely and not delivering
water at all, or the device failing. Under either condition, the operation and performance of the device cannot
be guaranteed.
INSTALLATION – WATER HEATER
55
Circulated Hot Water Flow and Return – Continuous Flow Gas Water Heater
Circulated Hot Water Flow and Return – In-series Gas Booster as part of a Solar Water Heater Installation
FROST PROTECTION
The water heater has a frost protection system. The frost protection system will protect the water heater from
damage, by preventing ice forming in the waterways of the water heater, in the event of freezing conditions
occurring.
The frost protection system will be rendered inoperable if electrical power is not available at the water heater.
Damage to the water heater caused by freezing of the pipe work to or from the water heater is not covered
under the Rheem warranty. Refer to AS/NZS 3500.4 for precautions to be taken for installations in frost prone
areas. The water heater is not suitable for installation in areas where the ambient temperature falls below -
20°C (including wind chill factor).
The cold water line to the water heater must be insulated with suitable thickness insulation if freezing conditions
are likely to occur. The insulation must be fitted to the underside of the water heater and be weatherproof and
UV resistant if exposed.
REDUCING HEAT LOSSES
The hot water line from the water heater and the pipe work between the solar storage tank, if one is installed,
and the in-series gas booster must be insulated in accordance with the requirements of AS/NZS 3500.4. The
insulation must be weatherproof and UV resistant if exposed. The insulation must be fitted up to the
connections on the both the underside of the water heater and the solar storage tank.
from solar
storage tank
INSTALLATION – WATER HEATER
56
WATER TEMPERATURE DIAGRAMS
Note: NZ - Kitchen Controller max setting is 55°C
874 Series - Kitchen and Bathroom Controllers 876 Series – Kitchen and Bathroom Controllers
Note: NZ - Kitchen Controller max setting is 55°C
874 Series - Kitchen Controller Only 876 Series - Kitchen Controller Only
874 Series - Bathroom Controllers Only 876 Series - Bathroom Controllers Only
874 Series - No Controllers 876 Series - No Controllers
Notes
• Temperature Limiting Devices – refer to “Hot Water Delivery” on page 52.
• Factory preset outlet temperature setting is:
◼ 874 series 60°C – AU, 55°C – NZ 876 series 50°C
INSTALLATION – WATER HEATER
57
DIMENSIONS AND TECHNICAL DATA
Gas Details
Hourly Gas
Consumption
(MJ)
Min Gas
Pressure
(kPa)
Test Point Gas Pressure (kPa)
Max Gas
Pressure
(kPa)
Injector Size
(mm)
minimum
maximum
Model
874627
876627
874627
876627
874627
876627
874627
876627
874627
876627
874627
876627
Natural
205
1.13
0.193
0.905
3.50
16 x 2.05
Propane
205
2.75
0.277
1.540
3.50
16 x 1.25
Universal LP Gas
199
2.75
0.277
1.490
3.50
16 x 1.25
Model Numbers
• Gas type Letter N, P or L is included in the model number to denote gas type.
N = Natural, P = Propane (AU), L = Universal LP Gas (NZ).
E.g. 874627NF, 876627PF, 874627LFZ
• Frost protection Letter F is included in the model number to denote frost protection.
• New Zealand Letter Z is included in the model number to denote New Zealand models.
E.g. 874627NFZ, 874627LFZ.
Model
874627
876627
Natural,
Propane
874627
Universal
LP Gas
Water heating
capacity
@ 40°C rise
litres / min
16.7
16.0
Nominal
capacity
@ 25°C rise
litres / min
27
26
Mass Empty
(unpackaged)
kg
24
24
Technical data is subject to change.
INSTALLATION – WATER HEATER
58
DIMENSIONS – STANDARD CONTROLLERS
Kitchen Controller (Standard)
Bathroom Controller (Standard)
INSTALLATION – WATER HEATER
59
DIMENSIONS – DELUXE CONTROLLERS
Deluxe Controller – Cover Closed
Deluxe Controller – Cover Open
INSTALLATION – WATER HEATER
60
TYPICAL INSTALLATION – OUTDOOR LOCATION
61
CONNECTIONS – PLUMBING
All plumbing work must be carried out by a qualified person and in compliance with the Standard
AS/NZS 3500.4 and all local codes and regulatory authority requirements.
All gas work must be carried out by a qualified person and in compliance with the Standard AS/NZS 5601.1,
all local codes and regulatory authority requirements.
In New Zealand the installation must conform to Clauses G11, G12 and H1 of the New Zealand Building Code.
CONNECTION SIZES
Model
874627
876627
Hot water outlet connection
R 3/4
-
50°C limited outlet connection
-
R 3/4
Cold water inlet connection
R 3/4
R 3/4
Gas inlet connection
R 3/4
R 3/4
WATER INLET AND OUTLET
All pipe work must be cleared of foreign matter before
connection and purged before attempting to operate the
water heater. All olive compression fittings must use brass
or copper olives. Use an approved thread sealant such as
Teflon tape on all threaded joints. Only use sufficient thread
sealant to seal a joint. Refer to the sealant manufacturer’s
guidelines for how much and where to use.
Warning: Sealant must not be allowed in the waterways
of pipe work or fittings. Excess sealant may be carried into
the water heater where it will damage components and
block the internal filters. This damage to components or
blockage of filters is not covered by the Rheem warranty
and a service rectification fee will be charged.
A full flow gate valve or ball valve must be installed on the
cold water line or solar preheat water line to the water
heater. A non-return valve or stop tap must not be
installed. An acceptable arrangement is shown in the
diagram. Refer also to “Hot Water Delivery” on page 52 and
to “Mains Water Supply” on page 51.
A disconnection union must always be provided at the cold water inlet and hot water outlet on the water heater
to allow for disconnection of the water heater.
Insulation used on the cold and hot water lines must extend up to the cold water inlet and hot water outlet of
the water heater.
This water heater is intended to be permanently connected to the water mains and not connected by a hose-
set. A braided flexible hose or semi-flexible connector may be used for connection to the water heater, where
permitted by AS/NZS 3500.4.
Notes
• It is essential all pipe connections be correctly aligned, otherwise component connections within the water
heater may be strained and / or components themselves misaligned. It is recommended also, wherever
possible, pipe connections be made at the water heater first and final pipe runs be made in soft copper
pipe to allow some adjustment for misalignment.
• Use the spanner flats on the water heater fittings and take care to avoid twisting the water inlet and outlet
pipes inside the jacket.
Gas Water Heater
Cold (or Solar Preheat) and Hot Water
and Gas Connection Details
CONNECTIONS – PLUMBING
62
PIPE SIZES
The pipe sizing for hot water supply systems should be carried out by persons competent to do so, choosing
the most suitable pipe size to ensure adequate flow for each individual application. Reference to the technical
specifications of the water heater and local regulatory authority requirements must be made.
To achieve true mains pressure operation, the cold water line to the water heater should be the same size or
bigger than the hot water line from the water heater.
The minimum recommended cold pipe or solar preheat pipe and hot pipe size is DN20.
IN-SERIES BOOSTER
The pipe work between the solar storage tank (if one is installed) and the in-series gas booster has a minimum
recommended pipe size of DN20, MUST BE of copper and be fully insulated with a closed cell type insulation
or equivalent in accordance with the requirements of AS/NZS 3500.4.
The insulation must be weatherproof and UV resistant if exposed. The insulation must be fitted up to the
connections on both the solar storage tank and the in-series gas booster. A full flow isolation valve must be
installed on the water line to the in-series gas booster.
GAS INLET
The gas connection is made at the underside of the water heater. The pipe work must be cleared of foreign
matter before connection and purged before attempting to operate the water heater. An isolation valve and
disconnection union must be installed to allow servicing and removal of the water heater (refer to the diagram
on page 61).
Note: Refer to the Gas Installations Standard AS/NZS 5601.1 for the correct method of sizing the gas supply
pipe to the water heater. The pipe size selection must take into account the high gas input of this water heater
(refer to table on page 57) as well as all of the other gas appliances in the premises.
Warning: Always isolate the water heater before pressure testing the gas supply system. Disconnect the
water heater after the isolation valve to prevent the risk of serious damage to the gas control. The Rheem
warranty does not cover damage of any nature resulting from failure to observe this precaution. Refer to rating
label for gas types and pressures.
63
CONNECTIONS – ELECTRICAL
All electrical work and permanent wiring must be carried out by a qualified person and in accordance with the
Wiring Rules AS/NZS 3000 and all local codes and regulatory authority requirements.
Warning: Temperature controllers must not be fitted to this water heater (874 series) if it is installed as an
in-series gas booster with a solar water heater system because water at a temperature much higher than the
controller setting can be delivered. If a solar water heater is installed to an existing water heater installation,
then all controllers must be disconnected and removed.
The water heater is supplied with a 1.8 metre lead and plug and requires a weatherproof 220 - 240 V a.c.
50 Hz general purpose outlet (GPO) to be located within 1.2 metres of the installation. The GPO must be clear
of the flue exhaust, draining water, gas supply pipe and water connections.
The power consumption of the water heater is:
Component
Power
consumption
Comments
Gas water heater
80 Watts
627 – Burner on, anti-frost device inactive
175 Watts
627 – Burner on, anti-frost device active
The water heater will only operate on a sine wave at 50 Hz. Devices generating a square wave cannot be used
to supply power to the water heater.
64
EZ LINK SYSTEM DUAL INSTALLATION
The EZ Link
®
system is designed to electronically control two continuous flow gas water heaters and have
them operate as one. One or both water heaters may be in operation, depending upon the hot water demand.
The second water heater will only operate when the hot water demand exceeds the capacity of the first water
heater to supply.
The EZ Link system is suitable for installation with Rheem 874 and 876 series 627 model continuous flow gas
water heaters. The EZ Link Kit PN 299291 is required for the installation.
EZ Link Kit – PN 299291
Notes
• Only two continuous flow gas water heaters can be installed with an EZ Link system.
• The Rheem EZiSET system cannot be used on the 874 series – NZ or an 876 series water heaters if two
of these water heaters are installed with an EZ Link system.
• The EZ Link system will vary the start-up sequence of the two water heaters.
• The two continuous flow water heaters must be of the same model. The performance of two different
model water heaters manifolded together cannot be guaranteed.
• It is recommended the two water heaters be set with the same preset outlet temperature setting.
• A temperature controller(s) may be installed but is not required to be installed with the EZ Link system on
a Rheem 874 and 876 series 627 model dual installation. The controller can be either a standard or Deluxe
controller.
• If the EZ Link system is used with a water heater with a preset outlet temperature greater than 60°C and
a temperature controller is installed, the maximum outlet temperature of the water heater will be limited
by the maximum temperature setting of the temperature controller.
• Two Rheem 874627 model water heaters manifolded together and with an EZ Link system installed can
be used as an in-series gas booster system to a solar water heater installation so long as a temperature
controller is not installed.
Warning: Temperature controllers must not be fitted to a water heater (874 series) if it is installed as
an in-series gas booster with a solar water heater system because water at a temperature much higher
than the controller setting can be delivered.
screws x 2
cable clamps
x 2
EZ Link cable x 1
EZ LINK SYSTEM DUAL INSTALLATION
65
DUAL INSTALLATION
The two water heaters can be installed side by side with minimal clearance between them. Rheem 874 and
876 series 627 models are certified for installation with an exemption from the 300 mm minimum clearance
requirements between flue terminals, as stated in AS/NZS 5601.1 clause 6.9.3.
Install two water heaters of the same model in a parallel plumbing arrangement. It is good practice, but not
essential, to install the two water heaters in an Equa-Flow
®
manifold plumbing arrangement. There are basic
installation requirements which must be followed:
1. The pipe work must be sized to meet the requirements of both AS/NZS 3500.4 and the application. It is
recommended to use minimum DN25 pipe for the cold water line, cold and hot headers and hot water line
and DN20 for the cold and hot water branch lines of each water heater.
2. A full flow gate valve or ball valve must be installed on the cold water line to the system. A non-return
valve or stop tap must not be installed.
3. A full flow gate valve or ball valve (not a stop tap) should be installed on both the cold water branch and
hot water branch of each water heater.
4. An isolation valve must be installed on the gas branch of each water heater.
5. Non-return valves or pressure limiting valves must not be installed on the branch lines to the water heaters.
6. All fittings, valves and branch lines should be matched sets to each of the water heaters.
7. Sufficient space must be left to enable access, servicing or removal of either water heater.
Refer to the ‘Typical Two Unit Manifold with EZ Link Connection’ diagram on page 68 for installation and plant
layout details.
RATING LABEL INFORMATION
There is information on the rating label located on the right hand side of the water heater, which may be
required for future warranty and service requirements. This information will be hidden on the left hand water
heater if the two water heaters are installed with minimal clearance between them.
Move the rating label to or indelibly copy the water heater serial number, manufacture date and model number
from the label onto the left hand side or front panel of the left hand water heater or to another position which
is visible when the water heater is installed so the householder or responsible officer can access the water
heater details when required.
A second rating label is attached to the inside of the front cover. This is for a service person to access the
water heater details when required.
TEMPERATURE CONTROLLER
A temperature controller(s) may be installed but is not required to be installed on the Rheem 874 and
876 series 627 model water heaters with the EZ Link system. The controller can be either a standard or Deluxe
controller.
Warning: Temperature controllers must not be fitted to a water heater (874 series) if it is installed as an
in-series gas booster with a solar water heater system because water at a temperature much higher than the
controller setting can be delivered.
Connect a temperature controller to one only of the two water heaters. Up to three temperature controllers of
the same family can be installed to this water heater. Refer to “Installation – Controllers” on page 69.
The water heater connected with the temperature controller(s) will become the ‘master’ water heater. The
installed temperature controller(s) will control the temperature and functionality of both water heaters.
The maximum outlet temperature of the water heaters will be limited by the maximum temperature setting of
the temperature controller.
A temperature controller should not be installed if two 874 series 627 model water heaters are installed with
an EZ Link system and they are part of a circulated hot water flow and return system in a building. Refer to
“Circulated Hot Water Flow And Return System” on page 54.
EZ LINK SYSTEM DUAL INSTALLATION
66
EZ LINK CABLE CONNECTION
The references in steps 5 to 8 are to the ‘Control Board with EZ Link Connection’ diagram on page 67. To
connect the EZ Link cable to the water heaters:
Refer to “Installation – Controllers” on page 69 for information on the installation of temperature controllers.
1. Close any hot taps and ensure the burners on both water heaters are not operating.
2. Switch off the electrical supply at the power outlet to each water heater.
3. Remove the screws holding the front panel to the jacket on each water heater.
4. Gently disengage the front panel and pull forward to remove from each water heater.
5. Connect one end of the EZ Link cable to the first water heater.
If a controller(s) is connected to one of the water heaters, then this is the ‘first’ or ‘master’ water heater.
◼ Draw the cable through the cable grommet on the underside of the water heater.
◼ Plug the cable into the four pin connector located immediately below the MIN button, toward the upper
right hand corner of the Control Board (refer to the Control Board diagram).
The connector will only fit one way.
◼ Press until the connector snaps into place.
◼ Secure the EZ Link cable with the clamp and screw provided to the top right of the Control Board
(refer to the Control Board diagram).
6. Switch DIP SWITCH 4 to the on (up) position on the
first water heater (refer to the Control Board
diagram). Note: This dip switch is on the DIP 1 set
of dip switches.
◼ If a temperature controller is not installed, then
also switch DIP SWITCH 1 of the DIP 2 set of
dip switches to the on (up) position on the first
water heater.
7. Connect the other end of the EZ Link cable to the
second water heater.
◼ Draw the cable through the cable grommet on
the underside of the water heater.
◼ Plug the cable into the four pin connector
located immediately below the MIN button,
toward the upper right hand corner of the
Control Board (refer to the Control Board
diagram).
The connector will only fit one way.
◼ Press until the connector snaps into place.
◼ Secure the EZ Link cable with the clamp and
screw provided to the top right of the Control
Board (refer to the Control Board diagram)
8. Switch DIP SWITCH 4 to the on (up) position on the
second water heater (refer to the Control Board
diagram). Note: This dip switch is on the DIP 1 set
of dip switches.
9. Refit the front panel and screws to each water heater.
dip switch settings
without temperature controller
dip switch settings
with temperature controller connected
EZ LINK SYSTEM DUAL INSTALLATION
67
10. Check the main gas isolation valve and the isolation valves at the gas inlet to each water heater are fully
open.
11. Switch on the electrical supply at the power outlet to the water heater.
12. Turn on the controller by pressing the on / off ( ) button, if one is installed.
The on / off operating light and the priority light will both glow.
13. Check to ensure the flow from each connected hot tap is sufficient to operate a water heater.
◼ Open each hot tap independently.
One of the water heaters will operate automatically.
Note: The minimum operating flow rate for each water heater is 2.0 litres per minute.
14. Increase the hot water flow by turning on multiple hot taps until both of the water heaters operate to ensure
the EZ Link system is working correctly.
15. Turn off the hot taps.
Refer to “Commissioning” on page 76 for details on completing the installation.
Control Board with EZ Link Connection
in use
priority
X 10L
88
°C
EZ LINK SYSTEM DUAL INSTALLATION
68
Typical Two Unit Manifold with EZ Link Connection
69
INSTALLATION – CONTROLLERS
CONTROLLERS
The Rheem 874 and 876 series can be installed with Rheem controllers to enable the user to control the
temperature of the delivered water from the outlet of the water heater. There are two families of Rheem
controllers suitable for installation with this water heater; the standard controllers and the Deluxe controllers.
Standard Controllers
There are three types of standard controller. They are the Kitchen controller (Rheem AU - Part 299850,
NZ - Part A299850), Bathroom 1 controller (Rheem AU - Part 299851, NZ - Part A299851) and the
Bathroom 2 controller (Rheem AU - Part 299852, NZ - Part A299852). These part numbers include the
controller cable supplied with the controller.
The standard controllers are suitable for use on all 874 and 876 series models.
The standard controllers are identified by a ‘K’ (Kitchen controller), ‘B1’ (Bathroom 1 controller) or ‘B2’
(Bathroom 2 controller) located on the front bottom left hand corner of the standard controller.
Deluxe Controllers
There are three types of Deluxe controller. They are the Kitchen Deluxe controller (Rheem AU - Part 299858,
NZ - Part A299861), Bathroom 1 Deluxe controller (Rheem AU - Part 299859, NZ - Part A299862) and the
Bathroom 2 Deluxe controller (Rheem AU - Part 299860, NZ - Part A299863). These part numbers include the
controller cable supplied with the controller.
The Deluxe controllers are suitable for use on all 874 and 876 series models.
The Deluxe controllers are identified by a ‘K’ (Kitchen Deluxe controller), ‘B1’ (Bathroom 1 Deluxe controller)
or ‘B2’ (Bathroom 2 Deluxe controller), located under the front panel, to the bottom left hand corner adjacent
to the BATH FILL VOLUME label.
The standard and Deluxe controllers are designed to be hard wired into the water heater using either the
Kitchen controller cable (Rheem PN 299856) or the Bathroom controller cable (Rheem PN 299857).
Notes
• Temperature controllers are only suitable for single water heater installations or where two water heaters
are installed and linked together using the Rheem EZ Link system. They are not suitable if multiple water
heaters are manifolded together.
• Where more than one controller is installed, the second or third controller must be of the same family.
• A standard controller can only be installed with another standard controller(s) and a Deluxe controller can
only be installed with another Deluxe controller(s). A standard controller(s) and a Deluxe controller(s)
cannot be connected to the same water heater.
• One, two or three controllers can be installed. Only one of each type of controller can be connected to the
water heater. Therefore, a maximum of three controllers only can be connected to each water heater.
• A Bathroom 2 controller can only be installed if a Bathroom 1 controller is installed and a Bathroom 2
Deluxe controller can only be installed if a Bathroom 1 Deluxe controller is installed.
• An additional Kitchen controller cable or Bathroom controller cable can be used if an extension of the
cable length is required.
It will be necessary to cut an opposite end off both cables to be installed in order to wire them together.
Alternatively, the cables may be extended using two-core flex with a minimum cross-sectional area of
0.5 mm
2
.
• Other manufacturers’ controllers are not suitable to and cannot be installed with this water heater.
Warning: Temperature controllers must not be fitted to this water heater (874 series) if it is installed as an
in-series gas booster with a solar water heater system because water at a temperature much higher than the
controller setting can be delivered. If a solar water heater is installed to an existing water heater installation,
then all controllers must be disconnected and removed.
INSTALLATION – CONTROLLERS
70
Location – The controllers must be installed in dry, shaded and clean locations.
Do not install the controllers:
• Near a heat source, such as a cook top, stove or oven. Heat, steam and smoke will interfere with the
electronic components of the controllers.
• In direct sunlight.
• In or near a wet area. The controllers are not waterproof. Water may damage the controllers.
• Outdoors. The controllers are not weatherproof.
KITCHEN CONTROLLER
The standard Kitchen controller (Rheem AU - Part 299853, NZ - Part A299850) or Kitchen Deluxe controller
(Rheem AU - Part 299861, NZ - Part A299861) is to be installed in the kitchen or laundry only. It has a
minimum temperature setting of 37°C and a maximum temperature setting of:
• 874 series 60°C – AU 55°C – NZ
• 876 series 50°C
Choose a suitable location for the Kitchen controller, away from water, heat and sunlight.
Kitchen Controller (Standard) Components
Kitchen Deluxe Controller Components
screw x 2
controller screw
Kitchen controller (standard)
base plate
screw x 2
controller screw
Kitchen Deluxe controller
base plate
INSTALLATION – CONTROLLERS
71
Wiring installation:
1. Penetrate the wall with a 30-35 mm hole at the controller location.
2. Install the Kitchen controller cable between the location of the controller and the water heater.
3. Remove the base plate from the controller.
4. Draw the cable through the central hole in the base plate.
5. Fix the base plate to the wall using suitable screws and wall anchors.
Ensure the projections in the base plate are pointing upwards.
6. Connect the cable to the two terminals on the back of the controller (connections are not polarity sensitive).
Ensure the connecting screws are seated tightly.
7. Place the controller over the base plate.
Ensure the projections in the base plate fit into the housings in the controller.
8. Fix the controller to the base plate at the bottom of the controller, using the controller screw provided.
9. Proceed to “Connecting the Controller(s) to the Water Heater” on page 75.
Kitchen Controller (Standard and Deluxe) Installation
Concealed Cable
controller
cable
screws
terminal
screws
controller screw
base plate
wall
penetration
suitable wall
anchors
projections
INSTALLATION – CONTROLLERS
72
If it is necessary to have an exposed wiring installation, follow this procedure omitting Steps 1 and 4, and make
an opening in the thin section in the underside of the controller to accommodate the cable (as shown in the
diagram), prior to Step 6.
Kitchen Controller (Standard and Deluxe) Installation
Exposed Cable
controller
cable
screws
terminal
screws
controller
screw
base plate
opening
suitable wall
anchors
projections
INSTALLATION – CONTROLLERS
73
BATHROOM 1 AND BATHROOM 2 CONTROLLERS
If only one Bathroom controller is to be installed, the standard Bathroom 1 Controller (Rheem
AU - Part 299854, NZ - Part A299851) or the Bathroom 1 Deluxe controller (Rheem AU - Part 299862,
NZ - Part A299862) must be used. If two Bathroom controllers are to be installed, one must be a standard
Bathroom 1 controller and the other must be a standard Bathroom 2 controller (Rheem AU - Part 299855,
NZ - Part A299852) or one must be a Bathroom 1 Deluxe controller and the other must be a Bathroom 2
Deluxe controller (Rheem AU - Part 299863, NZ - Part A299863).
They have a minimum temperature setting of 37°C and a maximum temperature setting of:
• 874 series 50°C
• 876 series 50°C
The method of installation for the standard Bathroom 1 and Bathroom 2 controllers and the Bathroom 1 Deluxe
and Bathroom 2 Deluxe controllers is identical.
Choose a suitable location for each Bathroom controller, away from water, heat, and sunlight. The Bathroom
controllers are supplied with a 250 mm length of wire with connectors to mate with the Bathroom controller
cable.
Notes
• It is not recommended to have exposed wiring in a bathroom.
• Do not apply sealant to the controller cable.
Bathroom 1 and Bathroom 2 Controller Components
Bathroom 1 Deluxe and Bathroom 2 Deluxe Controller Components
screw x 2
controller screw
base plate
foam packing
Bathroom controller (standard)
screw x 2
controller screw
base plate
foam packing
Bathroom Deluxe controller
INSTALLATION – CONTROLLERS
74
Wiring installation:
1. Penetrate the wall with a 30-35 mm hole at the controller location.
2. Install the supplied cable between the location of the controller and the water heater.
3. Remove the base plate from the controller.
4. Peel off one side of the adhesive paper from the foam packing and adhere to the back face of the base
plate. This is the side without the projections.
5. Peel off the remaining adhesive paper from the foam packing.
6. Draw the cable through the central hole in the base plate.
7. Fix the base plate to the wall using suitable screws and wall anchors.
Ensure the projections in the base plate are pointing upwards.
8. Plug the controller wire into the Bathroom controller cable.
9. Place the controller over the base plate.
Ensure the projections in the base plate fit into the housings in the controller.
10. Fix the controller to the base plate at the bottom of the controller, using the screw provided.
11. Proceed to “Connecting the Controller(s) to the Water Heater” on page 75.
Bathroom Controller (Standard and Deluxe) Installation
controller
cable
screws
cable connectors
controller
screw
base plate
wall
penetration
suitable wall
anchors
adhesive paper
projections
foam packing
INSTALLATION – CONTROLLERS
75
CONNECTING THE CONTROLLER(S) TO THE WATER HEATER
To connect the controller(s) to the water heater:
1. Ensure the electrical supply to the water heater is
switched off.
2. Unscrew and gently remove the electrical cover from the
underside of the water heater.
3. Draw the cable(s) through the electrical cover.
4. Connect a cable lug from each cable to each of the remote
controller terminals. Each cable has two cable lugs.
Ensure the terminal screws are seated firmly and there
are no excess wire loops inside of the electrical cover.
◼ The cable connections are non-polarised.
◼ Three cable lugs, one from each controller, can be
connected to each remote controller terminal.
5. Place the cable(s) in the cable holder notches.
It is important to seat the cables into the cable notches.
Failure to do this may cause an unstable contact or even
disconnection of the cables from the terminals if the
cables were to be pulled.
6. Refit the electrical cover to the water heater and replace
the screws.
7. Switch on the electrical supply to the water heater.
Upon completion of the installation of the controllers, it is necessary to test their operation through the complete
range of functions (refer to “Temperature Control” on pages 15 to 44).
Upon completion and testing of the installation, explain to the householder the functions and operation of the
controllers and the water heater.
If it is necessary to turn off the water heater on completion of the installation, such as on a building site or
where the premises is vacant, follow the procedure “To Turn Off the Water Heater” on page 85.
76
COMMISSIONING
All water heaters are tested and adjusted before dispatch from the factory, however further adjustments may
become necessary because of local conditions.
TO TURN ON THE WATER HEATER
• Open all of the hot taps in the house (don’t forget the shower).
• Open the cold water isolation valve fully at the inlet to the water heater.
Air will be forced out of the taps.
• Close each tap as water flows freely from it.
• Check the pipe work for leaks.
• Open the gas isolation valve fully.
• Check the gas pipe work for leaks.
• Plug in the water heater at the power outlet and switch on the electrical supply.
• Turn on a controller, if one is fitted, by pressing the on / off ( ) button.
The on / off operating light and the priority light will both glow.
• Open a hot tap.
The water heater will operate automatically.
• Check to ensure the flow from each connected hot tap is sufficient to operate the water heater.
The minimum operating flow rate for all models is 2.0 litres per minute.
• Check and if required adjust the preset outlet temperature setting of the water heater.
Refer to “Preset Outlet Temperature Setting” on page 80.
• Check and if required adjust the outlet compensation temperature adjustment on an AU – 876 series or
NZ – 874 series water heater.
Refer to “Outlet Compensation Temperature Adjustment” on page 82.
The automatic water governor incorporated in the water heater is not adjustable.
To complete the installation, it is necessary to check the gas supply pressure at the inlet to the water heater
(refer to “Gas Inlet Pressure” on page 76), the minimum test point pressure and the maximum test point
pressure (refer to “Burner Gas Pressure” on page 78).
Upon completion and testing of the installation, ensure the controller(s) is turned off (if fitted). Explain to the
householder or a responsible officer the functions and operation of the water heater and the controllers (if
fitted).
Warning: Upon completion of the installation and commissioning of the water heater, leave this guide with
the householder or a responsible officer. DO NOT leave this guide inside of the cover of the water heater, as
it may interfere with the safe operation of the water heater or ignite when the water heater is turned on.
GAS INLET PRESSURE
IMPORTANT - CHECK the gas supply pressure at the inlet to the water heater with the water heater and all
other gas burning appliances in the premises operating (burners alight). The minimum gas supply pressure is:
Natural Gas 1.13 kPa Propane, LP Gas 2.75 kPa
If this minimum cannot be achieved, it may indicate the meter or the gas line to the water heater is undersized.
It is important to ensure that an adequate gas supply pressure is available to the water heater when other gas
burning appliances, on the same gas supply, are operating.
in use
priority
X 10L
88
°C
COMMISSIONING
77
Gas Inlet Test Point Pressure
To check the gas inlet pressure:
1. Close any hot taps and ensure the
burners are not operating.
2. Close the gas isolation valve at the gas
inlet to the water heater.
3. Locate the gas inlet test point on the gas
connection to the water heater.
◼ Remove the test point screw and
washer from the test point orifice.
◼ Connect the manometer.
4. Open the gas isolation valve fully at the
gas inlet to the water heater.
5. Observe the gas pressure reading on the
manometer.
If the manometer reading is between the minimum and maximum inlet gas pressure ratings on the rating
label, no adjustment is required.
If the manometer reading is below the minimum inlet gas pressure rating on the rating label, then either
the gas pipe to the water heater is undersized and needs to be rectified or adjustment is required at the
gas regulator.
If the manometer reading is above the maximum inlet gas pressure ratings on the rating label, then
adjustment is required at the gas regulator.
6. Switch on the electrical supply at the power outlet to the water heater if it is not already switched on and
turn on a controller, if one is fitted, by pressing the on / off ( ) button.
7. Open a hot tap fully and ensure the burners are fully ignited.
It may be necessary to open a second tap.
8. Turn on all other gas burning appliances in the house which are on the same gas supply.
9. Observe the gas pressure reading on the manometer.
If the manometer reading is between the minimum and maximum inlet gas pressure ratings on the rating
label, no adjustment is required.
If the manometer reading is below the minimum inlet gas pressure rating on the rating label, then either
the gas pipe to the water heater is undersized and needs to be rectified or adjustment is required at the
gas regulator.
If the manometer reading is above the maximum inlet gas pressure ratings on the rating label, then
adjustment is required at the gas regulator.
10. Turn off the other gas burning appliances in the house.
11. If an adjustment was made during Step 9, repeat this procedure from Step 5.
12. Close the hot tap(s).
13. Close the gas isolation valve at the inlet to the water heater.
14. Remove the manometer and refit and tighten the test point screw and washer.
15. Open the gas isolation valve fully at the gas inlet to the water heater.
16. Open a hot tap again so the burners ignite.
17. Test for gas leaks.
18. Close the hot tap.
in use
priority
X 10L
88
°C
COMMISSIONING
78
BURNER GAS PRESSURE
It is necessary to check the burner gas pressure at both the minimum and maximum operational settings. To
check and if necessary adjust the operational gas pressures, the electrical supply to the water heater must be
switched on, the burners ignited and hot water must be flowing from a hot tap.
Warning: The removal of the front panel will expose 220 - 240 V a.c. wiring. Take care not to touch wiring
terminals.
Note: If an 874 series model is installed as an in-series gas booster for a solar water heater, then during this
procedure the temperature of the water entering the in-series gas booster must be below 58°C. Otherwise the
gas burners will not ignite and the operational gas pressures cannot be measured.
Minimum test point gas pressure
Refer to the rating label on the water heater for the minimum test point gas pressure.
1. Close any hot taps and ensure the burners are not operating.
2. Turn off the controller(s), if one is fitted, by pressing the
on / off ( ) button and switch off the electrical supply at
the power outlet to the water heater.
3. Remove the screws holding the front panel to the jacket.
4. Gently disengage the front panel and pull forward to
remove from the water heater.
5. Locate the burner pressure test point on the main burner
manifold.
◼ Remove the test point screw and washer from the test
point orifice.
◼ Connect the manometer.
6. Switch on the electrical supply at the power outlet to the
water heater and turn on a controller, if one is fitted, by
pressing the on / off ( ) button.
7. Open the gas isolation valve fully at the gas inlet to the
water heater, if not already open.
8. Open a hot tap slowly until the burners ignite.
9. Press and hold down the MIN button and observe the
reading on the manometer.
◼ “1L” is shown on the LED display.
10. Release the MIN button.
If the manometer reading observed in step 9 agrees with
the rating label, no further adjustment is required.
11. To adjust, press and hold the adjuster button.
◼ “LH” is shown on the LED display.
Note: The adjuster button must be held down
continuously through steps 11 to 13.
12. Press and hold the MIN button and observe the reading
on the manometer.
◼ The manometer reading will change as the test point
gas pressure adjusts.
Note: While the MIN button is pressed, the gas pressure
will at first increase then decrease, cycling between an
upper gas pressure limit (39 on the LED display) and a
lower gas pressure limit (01 on the LED display).
13. Release the MIN button when the reading on the manometer agrees with the rating label.
14. Release the adjuster button.
in use
priority
X 10L
88
°C
in use
priority
X 10L
88
°C
COMMISSIONING
79
Notes
• If the burners extinguish and error code 11 or 12 starts to flash on the LED display:
◼ release the MIN and adjuster buttons
◼ close the hot tap
◼ clear the error code (refer to “Clearing Error Code” on page 79)
◼ recommence the procedure from Step 8.
• If the adjuster button is released before Step 13, clear any error code (if displayed) and recommence the
procedure from Step 8.
Maximum test point gas pressure
Refer to the rating label on the water heater for the maximum test point gas pressure.
Follow Steps 8 to 14 of the “Minimum test point gas pressure” procedure on
page 78, but open the hot tap fully and use the MAX button instead of the
MIN button. It may be necessary to open two or three hot taps fully,
depending upon the model of water heater and the incoming cold water
temperature.
Note: In Step 9, “3H” (27 models) will be shown on the LED display.
After setting the minimum and maximum test point gas pressures:
• Close the hot tap.
• Remove the manometer and refit and tighten the test point screw and washer.
• Open a hot tap again so the burners ignite.
• Test for gas leaks.
• Close the hot tap.
• Turn off the controller, if one is fitted, by pressing the on / off ( ) button
• Switch off the electrical supply at the power outlet to the water heater
• Refit the front panel and screws to the water heater.
Clearing Error Code
If an error code does appear on the LED display during the commissioning process, it will be necessary to
clear the error in order to complete the installation.
To clear an error code:
• switch off the electrical supply at the power outlet to the water heater
• check the gas isolation valve at the gas inlet to the water heater is fully open
• wait five (5) minutes
• switch on the electrical supply at the power outlet to the water heater
in use
priority
X 10L
88
°C
COMMISSIONING
80
PRESET OUTLET TEMPERATURE SETTING
The factory preset outlet temperature setting of the water heater is:
• 874 series 60°C – AU, 55°C – NZ
• 876 series 50°C
If a temperature controller is connected to the water heater, this will override the preset outlet temperature
setting and the maximum temperature setting will be:
Maximum Outlet Temperature
874 series
876 series
Kitchen controller connected
60°C – AU, 55°C – NZ
50°C
Bathroom controller only connected
50°C
50°C
It is usually not necessary to adjust the factory preset outlet temperature setting of the water heater, unless
the customer has a particular requirement for this to be done or it is to be installed as an in-series gas booster
to a solar water heater.
Refer to “To Check or Adjust the Preset Outlet Temperature Setting” on page 80 to check or if required to
adjust the preset outlet temperature setting of the water heater.
Gas Booster for a Solar Water Heater
Note: Australian Standard AS 3498 and New Zealand Building Code Clause G12 requires that a water heater
provides the means to inhibit the growth of Legionella bacteria in potable water. When this water heater is
used as an in-series booster for a solar water heater it can satisfy these AS 3498 and Clause G12 requirements
provided it is energised, the booster preset outlet temperature setting is 70°C, and that a remote temperature
controller is not used.
It will be necessary to check and if required to adjust the preset outlet temperature setting of the continuous
flow water heater when:
• it is installed as an in-series gas booster to a solar water heater
• it is an existing continuous flow water heater and a solar water heater is then installed.
Notes
• Consideration must be given to the delivery temperature to any ablution and public areas such as a
bathroom, ensuite or public amenities. Refer to “Hot Water Delivery” on page 52 and to “Schematics of
Two Temperature Zones Using A Temperature Limiting Device” on page 53.
• The 876 series water heater, marked “THIS APPLIANCE DELIVERS WATER NOT EXCEEDING 50°C IN
ACCORDANCE WITH AS 3498” on the front panel, must not be installed as an in-series gas booster to
a solar water heater, as water temperature greater than 50°C can be delivered from the water heater
contravening its compliance to AS 3498.
TO CHECK OR ADJUST THE PRESET OUTLET TEMPERATURE SETTING
The temperature settings will be displayed on the LED display. The preset outlet temperature settings are:
• 874 series 38°C, 40°C, 42°C, 43°C, 45°C, 50°C, 55°C, 60°C*, 70°C, 75°C
* AUS – 60°C is a preset outlet temperature setting for Australian models only.
• 876 series 38°C, 40°C, 42°C, 43°C, 45°C, 50°C
It is necessary to have the electrical supply to the water heater switched on during stages of checking or
adjusting the preset outlet temperature setting procedure.
COMMISSIONING
81
Warning: The removal of the front panel will expose 220 - 240 V a.c. wiring. Take care not to touch wiring
terminals. The adjustment must be carried out by a qualified person.
Warning: This procedure will involve the adjustment of dip switches. Adjustment of a dip switch should
only be made with an insulated tool.
To check or adjust the preset outlet temperature setting:
1. Switch off the electrical supply at the power outlet to the water heater.
2. Remove the screws holding the front panel to the jacket.
3. Gently disengage the front panel and pull forward to remove from the water heater.
4. Close the cold water isolation valve at the inlet to the water heater.
5. Switch on the electrical supply at the power outlet to the water heater.
Note: Wait ten (10) seconds for the electronic system to initialise.
6. Switch dip switches 3 and 4 to the on (up) position on the DIP 1 set of
DIP switches on the I.C. Board.
The current preset outlet temperature setting will show on the LED
display.
If the temperature displayed on the LED display is the desired preset
outlet temperature setting, then proceed to step 8, as no further
adjustment is necessary.
7. Press the MAX button to increase or the MIN button to decrease the
preset outlet temperature setting.
Each press of the MAX or MIN button will increase or decrease the
preset temperature by one increment.
The MAX and MIN buttons are located underneath the DIP 1 and DIP 2
set of DIP switches.
874 series
The increments are 38°C, 40°C, 42°C, 43°C, 45°C, 50°C, 55°C, 60°C*,
70°C, 75°C.
* 60°C – AU models only.
876 series
The increments are 38°C, 40°C, 42°C, 43°C, 45°C, 50°C.
8. Switch dip switches 3 and 4 to the off (down) position.
The LED display will go blank.
Note: Wait ten (10) seconds for the setting to be saved. The preset
outlet temperature setting is now set.
9. Switch off the electrical supply at the power outlet to the water heater.
10. Refit the front panel and screws to the water heater.
11. Open the cold water isolation valve fully at the inlet to the water heater.
12. Switch on the electrical supply at the power outlet to the water heater.
COMMISSIONING
82
OUTLET TEMPERATURE COMPENSATION ADJUSTMENT
The outlet temperature compensation adjustment function is only applicable to:
• AU – Australian 876 series 627 water heaters
The maximum outlet temperature may be adjusted to compensate for temperature losses in the pipe work
between the water heater outlet and fixtures used primarily for personal hygiene. The 876 series is
available in Australia only.
• NZ – New Zealand 874 series 627 water heaters
The maximum outlet temperature may be adjusted to compensate for any minor over-heating of the water
by the water heater. This is to ensure the water temperature does not exceed 55°C at fixtures used
primarily for personal hygiene.
This procedure cannot be conducted on an Australian 874 series water heaters.
Warnings
• After adjustment, the water temperature from the first tap in the hot water pipe work used primarily for
personal hygiene after the water heater, such as in a bathroom or ensuite, MUST NOT exceed:
▪ The temperature displayed on a temperature controller connected to the water heater, or
▪ AU – 50°C if a temperature controller is not connected to an 876 series water heater, or
▪ NZ – 55°C if a temperature controller is not connected to an 874 series water heater.
• If there is a tap, such as a kitchen or laundry tap, in the hot water pipe work between the water heater and
the first tap used primarily for personal hygiene, then it is possible for:
▪ AU – a water temperature to be delivered from that tap of up to 2°C higher than the setting shown on
the controller.
▪ NZ – a water temperature to be delivered from that tap of up to 2°C lower than the setting shown on
the controller.
It is necessary to have the electrical supply to the water heater switched on during stages of the outlet
temperature compensation adjustment procedure.
Warnings
• The removal of the front panel will expose 220 - 240 V a.c. wiring. Take care not to touch wiring terminals.
The adjustment must be carried out by a qualified person.
• This procedure will involve the adjustment of dip switches. Adjustment of a dip switch should only be made
with an insulated tool.
Before Commencing the Procedure
This procedure cannot be conducted:
• With a temperature controller connected to the water heater.
▪ A temperature controller(s) connected to the water heater must be disconnected prior to the
commencement of this procedure. Refer to “Disconnecting a Temperature Controller(s)” on page 83.
• With an EZ Link system set up on the water heaters.
▪ The DIP switches need to be reset to the off (down) position on both water heaters prior to the
commencement of this procedure.
▪ The EZ Link cable does not need to be disconnected.
▪ The Outlet Temperature Compensation Adjustment procedure has to be performed individually on
both water heaters.
▪ Whilst the procedure is being conducted on one water heater, the other water heater has to be
isolated by turning off the cold water isolation valve to the water heater.
COMMISSIONING
83
Disconnecting a Temperature Controller(s)
To disconnect the temperature controller(s):
1. Switch off the electrical supply at the power outlet to the
water heater.
2. Unscrew and gently remove the electrical cover from the
underside of the water heater.
3. Loosen the terminal screws to release the cables.
4. Withdraw the cables from the terminals and cable holder
notches, ensuring they are well clear of the terminals.
Note: Prior to the commencement of this procedure, the preset
outlet temperature setting of the water heater must be set to:
• AU – 50°C for an Australian model 876 series water
heater, or
• NZ – 55°C for a New Zealand model 874 series water
heater.
This procedure cannot be performed if the preset outlet
temperature is set below 50°C (AU – 876 series model) or
above or below 55°C (NZ – 874 series model). Refer to “To
Check or Adjust the Preset Outlet Temperature Setting” on
page 80.
Outlet Temperature Adjustment
To adjust the outlet temperature:
1. Switch on the electrical supply at the power outlet to the water heater.
2. Locate the first hot tap in the hot water pipe work after the water heater used primarily for personal hygiene.
3. Turn on the hot tap.
4. Using a thermometer, measure the temperature of the water from the tap, until the temperature stops
increasing.
If the water temperature is:
◼ AU – below 50°C for an 876 series model, the maximum outlet temperature of the water heater can
be adjusted upwards, or
◼ NZ – above 55 °C for an 874 series model, the maximum outlet temperature of the water heater can
be adjusted downwards.
5. Turn off the hot tap.
6. Switch off the electrical supply at the power outlet to the water heater.
7. Remove the screws holding the front panel to the jacket.
8. Gently disengage the front panel and pull forward to remove from the water heater.
9. Switch on the electrical supply at the power outlet to the water heater.
Note: Wait ten (10) seconds for the electronic system to initialise.
COMMISSIONING
84
10. Switch dip switches 1 and 2 to the on (up) position on the DIP 2 set
of DIP switches on the I.C. Board.
The temperature setting of ‘48’ will show on the LED display, if this
has not previously been adjusted.
11. AU – 874 series: Press the MAX button once to increase the outlet
temperature setting to the next increment.
The MAX button is located underneath the DIP 1 and DIP 2 set of
DIP switches and to the right of the MIN button.
Each press of the MAX button will increase the temperature setting
by one increment.
The outlet temperature setting will show on the LED display.
The outlet temperature setting increments above 48°C are:
◼ 50°C, 51°C, 52°C.
12. NZ – 876 series: Press the MIN button once to decrease the outlet
temperature setting to the next increment.
The MIN button is located underneath the DIP 1 and DIP 2 set of DIP
switches and to the left of the MAX button.
Each press of the MIN button will decrease the temperature setting
by one increment.
The outlet temperature setting will show on the LED display.
The outlet temperature setting increments below 55°C are:
◼ 50°C, 51°C, 52°C.
13. Switch dip switches 1 and 2 to the off (down) position on the DIP 2
set of DIP switches on the I.C. Board.
The LED display will go blank.
Note: Wait ten (10) seconds for the setting to be saved.
14. Check the water temperature at the hot tap by repeating steps 2 to 5.
15. AU – 876 series:
◼ if the water temperature is still below 50°C and requires to be increased, repeat steps 10, 11 and 13,
followed by steps 2 to 5 until an acceptable water temperature not exceeding 50°C is measured at
the same hot tap.
◼ if the water temperature exceeds 50°C, then;
➢ switch dip switches 1 and 2 to the on (up) position on the DIP 2 set of DIP switches on the I.C.
Board.
The outlet temperature setting will show on the LED display.
➢ press the MIN button once to decrease the outlet temperature setting to the next increment.
Each press of the MIN button will decrease the outlet temperature by one increment.
The MIN button is located underneath the DIP 1 and DIP 2 set of DIP switches and to the left of
the MAX button.
➢ Switch dip switches 1 and 2 to the off (down) position on the DIP 2 set of DIP switches on the
I.C. Board.
The LED display will go blank.
Note: Wait ten (10) seconds for the setting to be saved.
➢ repeat steps 2 to 5 to confirm the water temperature does not exceed 50°C.
COMMISSIONING
85
16. NZ – 874 series:
◼ if the water temperature is still below 50°C and requires to be increased, repeat steps 10, 12 and 13,
followed by steps 2 to 5 until an acceptable water temperature not exceeding 55°C is measured at
the same hot tap.
◼ if the water temperature is below 55°C, then;
➢ switch dip switches 1 and 2 to the on (up) position on the DIP 2 set of DIP switches on the I.C.
Board.
The outlet temperature setting will show on the LED display.
➢ press the MAX button once to increase the outlet temperature setting to the next increment.
Each press of the MAX button will increase the outlet temperature by one increment.
The MAX button is located underneath the DIP 1 and DIP 2 set of DIP switches and to the right
of the MIN button.
➢ Switch dip switches 1 and 2 to the off (down) position on the DIP 2 set of DIP switches on the
I.C. Board.
The LED display will go blank.
Note: Wait ten (10) seconds for the setting to be saved.
➢ repeat steps 2 to 5 to confirm the water temperature does not exceed 50°C.
17. Switch off the electrical supply at the power outlet to the water heater.
18. Reconnect the controller cables (if a temperature controller is fitted), by following step 4 of the procedure
“Connecting the Controller(s) to the Water Heater” on page 75.
19. Reset the DIP switches if the water heater is part of an EZ Link system installation, by following steps 6
and 8 of the procedure “EZ Link Cable Connection” on page 66.
20. Refit the front panel and screws to the water heater.
21. Switch on the electrical supply at the power outlet to the water heater.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation, such as on a building site or
where the premises is vacant, then:
• Turn off the controllers(s) (if fitted) by pressing the on / off ( ) button.
The on / off operating light will go out and the priority light, if it is on, will go out.
• Switch off the electrical supply at the power outlet to the water heater (refer to note below).
• Close the gas isolation valve at the inlet to the water heater.
• Close the cold water isolation valve at the inlet to the water heater.
• Drain the water heater if there is a risk of freezing conditions occurring (refer to “Draining The Water
Heater” on page 86).
Notes
• The frost protection system will be rendered inoperable if electrical power is not available at the water
heater.
• Damage caused by freezing due to the unavailability of power at the water heater is not covered by the
Rheem warranty (refer to “Terms of the Rheem Warranty” on page 4).
• If the power has been switched off to the water heater and there is a risk of freezing, then it is necessary
to drain the water heater (refer to “Draining the Water Heater” on page 86).
in use
priority
X 10L
88
°C
86
DRAINING THE WATER HEATER
To drain the water heater:
• Turn off the water heater (refer to “Turn Off The Water Heater” on page 85).
• Open a hot tap (preferably the shower outlet).
• Unscrew the two drain plugs, one each at the cold water inlet and hot water outlet (874 series model) or
50°C limited outlet (876 series model), on the underside of the water heater.
Water will drain from the water heater.
• When water stops flowing from the water heater, close the hot tap.
Note: It is recommended not to screw the drain plugs back in, until the water heater is to be turned on again.
87
This page is intentionally blank.
Revision Date: 2020 November (41-16794-00) 122202H
88
