Gas Tankless Water Heater
TM
Suitable for combination potable water heating and space
heating. Please refer to local codes for space-heating
compliance.
If you have any questions, please
call or write to:
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Toll Free: 1-877-737-2840
WARNING
- Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch, do not
use any phone in your building.
• Immediately call your gas supplier from
a neighbor's phone. Follow the gas
supplier's instructions.
• If you cannot reach your gas supplier, call
the fire department.
- Installation and service must be performed
by a qualified installer, service agency or the
gas supplier.
On-Demand Water Heater
Installation Manual and Owners Guide
ANSIZ21.10.3•CSA4.3
If the information in these
instructions is not followed
exactly, a fire or explosion may
result causing property damage,
personal injury or death.
FEATURING
• ENDLESS HOT WATER
• ON-DEMAND USAGE
• COMPACT, SPACE SAVING
• ENERGY CONSERVATION
• COMPUTERIZED SAFETY
• NO PILOT LIGHT
• Complies with SCAQMD Rule
1146.2 for natural gas Low NOx
Emissions of 14 ng/J or 20 ppm.
Model
• 140 Outdoor (T-H3M-OS)
• 140 Indoor (T-H3M-DV)
2 Page
Installation Manual
Contents
CONTENTS
Installation Manual
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Included accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Venting instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Gas supply and gas pipe sizing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Condensate drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Electrical connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Temperature remote controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
High-altitude installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
INITIAL OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
OPTIONAL ITEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Owner's Guide
OPERATING SAFETY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
NORMAL OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Display of controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Temperature table of controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Temperature settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Additional features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Freeze protection system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Maintenance and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Unit draining and filter cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Descaling the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
COMPONENTS DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
OUTPUT TEMPERATURE CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
LIMITED WARRANTY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
This installation manual is approved for installation in the United States.
3 Page
Installaon Manual
Installation Manual
CONGRATULATIONS
Congratulations and thank you for choosing our tankless water heater.
Before use, we recommend that you read through this safety manual
carefully. Please refer to the back of the manual for details about the
warranty. Keep this manual for future reference.
If you lose the manual, contact the manufacturer or your local
distributor. When you call, please tell us the model number and the
serial number of your unit written on the rating plate of the water
heater.
4 Page
Installation Manual
Specifications
SPECIFICATIONS
*40 psi (0.27 MPa) or above is recommended for maximum flow.
** The Manifold Pressure is the factory setting and should not need adjustment.
NOTE:
• Check the rating plate to ensure this product matches your specifications.
• The manufacturer reserves the right to discontinue, or change at any time, specifications or designs
without notice and without incurring obligation.
Model
140
Indoor
(T-H3M-DV)
140
Outdoor
(T-H3M-OS)
Natural Gas Input
(Operating Range)
BTU/h
Min.: 15,000
Max.: 120,000
Propane Input
(Operating Range)
BTU/h
Min.: 15,000
Max.: 120,000
Gas Connection 1/2" NPT
Water Connection 3/4" NPT
Water Pressure*
psi
(MPa)
15 - 150 (0.1 - 1.0)
Natural gas
Inlet Pressure
inch W.C.
(kPa)
Min. 4.0 (1.0)
Max. 10.5 (2.6)
Propane
Inlet Pressure
inch W.C.
(kPa)
Min. 8.0 (2.0)
Max. 14.0 (3.5)
Manifold
Pressure**
Natural
Gas
inch W.C.
(Pa)
3.30
(820)
2.00
(500)
Propane
inch W.C.
(Pa)
3.00
(750)
1.60
(400)
Weight
lbs. (kg) 50 (22.5) 50 (22.5)
Dimension
inch
H 21-3/4 x W 14 x D 9-1/4
H 552 x W 352 x D 236
mm
Ignition Electric Ignition
Electric
Supply VAC / Hz
120 / 60
Consumption
Operation W / A
53.9 / 0.7
Standby W / A
3.2 / 0.05
Freeze-
Protection
W / A
223.9 / 1.94
5 Page
Introduction
Installation Manual
INTRODUCTION
• This manual provides information necessary for the installation, operation, and maintenance
of the water heater.
• The model description is listed on the rating plate which is attached to the side panel of the
water heater.
• Please read all installation instructions completely before installing this product.
• If you have any problems or questions regarding this equipment, consult the manufacturer or
its local representative.
• This equipment is an on-demand, tankless water heater designed to efficiently supply endless
hot water for your needs.
• These high efficiency models have a built-in secondary heat exchanger that absorbs latent
heat from the exhaust gas.
• The 140 Indoor (T-H3M-DV) model is only to be installed indoors. The 140 Outdoor (T-H3M-
OS) model is only to be installed outdoors.
• The principle behind tankless water heaters is simple:
*This diagram illustrates tankless water heater design concepts only and does not accurately
represent the water heaters physical description.
1. A hot water tap is turned on.
2. Water enters the heater.
3. The water flow sensor detects the water flow.
4. The computer initiates the fan motor and sends a signal to the igniter to create an ignition
spark.
5. The gas ignites and flames appear within the burner chamber.
6. Water circulates through the heat exchanger and then gets hot.
7. Using thermistors to measure temperatures throughout the water heater, the computer
modulates the gas and water valves to ensure proper output water temperature.
8. When the tap is turned off, the unit shuts down.
Burners
Exhaust
Secondary
heat exchanger
Primary
heat exchanger
Igniter
Gas valve
Fan motor
Flow sensor
Condensate
drain port
Gas inlet
Cold water inlet
Thermistor
Hot water outlet
Thermistor
Intake port
Exhaust
Thermistor
Water control
valve
Computer
board
6 Page
SAFETY GUIDELINES
SAFETY DEFINITION
Indicates an imminently hazardous situation which, if not avoided, will result in
death or serious injury.
DANGER
WARNING
Indicates an imminently hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION
Indicates an imminently hazardous situation which, if not avoided, could result
in minor or moderate injury.
GENERAL
1. Follow all local codes, or in the absence of local codes, follow the current edition of the National
Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or B149.1 Natural Gas, Propane Installation Code
in Canada.
2. Properly ground the water heater in accordance with all local codes or in the absence of local codes,
with the National Electrical Codes: ANSI/NFPA 70 in the USA or CSA standard C22.1 Canada Electrical
Code Part 1 in Canada.
3. Carefully plan where you intend to install the water heater. Please ensure:
• Your water heater will have enough combustible air and proper ventilation.
• Locate your heater where water leakage will not damage surrounding areas (please refer to p. 8).
4. Check the rating plate for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE and ELECTRIC
RATING.
*If this water heater does not match your requirements, do not install and consult with the manufac-
turer.
5. If any problem should occur, turn off all hot water taps and turn off the gas. Then call a trained
technician or the Gas Company or the manufacturer.
WARNING
• Water temperatures over 125 °F (52 °C) can cause severe burns instantly or
death from scalding. The water temperature is set at 120 °F (50 °C) from the
factory to minimize any scalding risk. Before bathing or showering always
check the water temperature.
• Do not store or use gasoline or other flammables, vapors, or liquids in the
vicinity of this appliance.
• Do not reverse the water and/or gas connections as this will damage the gas
valves and can cause severe injury or death. Follow the diagram on p. 22
when installing your water heater.
• Do not use this water heater if any part has been in contact with or been
immersed in water. Immediately call a licensed plumber, a licensed gas fitter,
or a professional service technician to inspect and/or service the water heater
if necessary.
• Do not disconnect the electrical supply if the ambient temperature will drop
below freezing. The Freeze Protection System only works if the water heater
has electrical power. The heat exchanger will not be covered under warranty
if it is damaged due to freezing. Refer to the section on the Freeze Protection
System on p. 40 for more information.
Installation Manual
Safety Guidelines
7 Page
Installation Manual
INSTALLATION
GENERAL
1. Follow all local codes, or in the absence of local codes, follow the current edition of the National
Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or B149.1 Natural Gas, Propane Installation Code in
Canada.
2. All gas water heaters require careful and correct installation to ensure safe and efficient operation.
This manual must be followed exactly. Read the “Safety Guidelines” section.
3. The manifold gas pressure is preset at the factory. It is computer controlled and should not need
adjustment.
4. Maintain proper space for servicing. Install the water heater so that it can be connected or removed
easily. Refer to the "Clearances" section on p. 9 for proper clearances.
5. The water heater must be installed in a location where the proper amount of combustible air will be
available to it at all times without obstructions.
6. The electrical connection requires a means of disconnection, to terminate power to the water heater
for servicing and safety purposes.
7. Do not install the water heater where the exhaust vent is pointing into any opening in a building or
where the noise may disturb your neighbors. Make sure the vent termination meets the required
distance by local code from any doorway or opening to prevent exhaust from entering a building (refer
to p. 17 to 19).
8. Particles from flour, aerosols, clothes dryers and other airborne contaminants may clog the air vent,
build up and reduce the functions of the rotating fan, cause improper burning of the gas, or cause
damage to the water heater. Regularly ensure that the area around the water heater is dust- or debris-
free. Regular maintenance is recommended for these types of environments. Sealed combustion is
recommended too.
9. The 140 Indoor (T-H3M-DV) model is to be installed indoors only. The model is equipped with a
thermistor and hi-limit switch for the exhaust gas, detecting excess temperatures within the flue
and enabling the water heater to safely stop operation if needed. These components are always
monitoring exhaust gas conditions in order to prevent heat damage to ABS, PVC (solid core), CPVC
(solid core), or Polypropylene (Plastic) venting if ABS, PVC, CPVC, or Polypropylene is used. If the
exhaust gas temperature exceeds 140 °F (60 °C) these components will enable the water heater to
safely stop operation. (These components are not installed on the outdoor model since the exhaust
vent is built-in.)
• The Indoor model requires 3 inch, or 4 inch diameter intake air supply pipe. The intake pipe must
be sealed airtight.
• Air supply pipe can be made of aluminum flexible tube, ABS, PVC (solid core), CPVC (solid core),
Polypropylene, corrugated stainless steel, or Category lll / IV stainless steel. Regarding exhaust
pipe, please refer to p.11 for detailed information.
• Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel® (polyphenylsulfone) in non-
metallic venting systems is prohibited. Covering non-metallic vent pipe and fittings with thermal
insulation is prohibited.
• Sidewall venting is recommended for the Indoor model. Vertical venting (roof termination) is
acceptable.
• The manufacturer recommends running the exhaust vent and the intake pipe as parallel as possible.
10. The 140 Outdoor (T-H3M-OS) model is only to be installed outdoors and only in the area with mild,
temperate climates.
The Outdoor model shall be wall-mounted or mounted on a stand. Locate the Outdoor model in an
open, unroofed area and maintain the minimum clearances. (Refer to p.9.)
Installaon
8 Page
Installaon
Installaon Manual
• Installation and service must be performed by a qualified installer (for example, a
licensed plumber or gas fitter), otherwise the warranty will be void.
• The installer (licensed professional) is responsible for the correct installation of
the water heater and for compliance with all national, state/provincial, and local
codes.
• The manufacturer does not recommend installing the water heater in a pit or
location where gas and water can accumulate.
• Do not have the vent terminal pointing toward any operating window, door, or
opening into a building.
• Do not install the water heater next to any source of airborne debris, such as a
clothes dryer and a vent that can cause debris to be trapped inside the combustion
chamber, unless the system is direct-vented.
• The manufacturer does not recommend installing the water heater in an attic due
to safety issues. If you install the water heater in an attic:
• Make sure the water heater will have enough combustion air and proper
ventilation.
• Keep the area around the water heater clean. When dust collects on the flame
sensor, the water heater will shut down on an error code.
• Place the water heater in a location that provides easy access for service and
maintenance.
• A drain pan, or other means of protection against water damage, is required to
be installed under the water heater in case of leaks.
• It is recommended to direct vent the heater.
WARNING
• Damage caused by water quality is not covered by the warranty.
• Only potable water can be used with this water heater. Do not introduce pool
or spa water, or any chemically treated water into the water heater.
• Water hardness levels must not exceed 7 grains per gallon (120 ppm) for single
family domestic applications or more than 4 grains per gallon (70 ppm) for
all other types of applications. Water hardness leads to scale formation and
may affect / damage the water heater. Hard water scaling must be avoided or
controlled by proper water treatment.
• Water pH levels must be between 6.5 and 8.5
• Well water must be treated.
• Do not install the water heater where water, debris, or flammable vapors may get
into the flue terminal.
• Although the water heater is designed to operate with minimal sound, the
manufacturer does not recommend installing the water heater on a wall adjacent
to a bedroom, or a room that is intended for quiet study or meditation, etc.
• Locate your heater close to a drain where water leakage will not do damage to
surrounding areas. As with any water heating appliance, the potential for leakage
at some time in the life of the product does exist. The manufacturer will not be
responsible for any water damage that may occur. If you install a drain pan under the
water heater, ensure that it will not restrict the combustion air flow.
CAUTION
9 Page
Installaon
Installaon Manual
INCLUDED ACCESSORIES
Check that these items below are included with the water heater.
Installation Manual
and Owners Guide
Temperature Remote Controller kit*
Outdoor model only
Bird Screen
Indoor model only
Qty: 1
Qty: 2
Qty: 1
*For more information on optional items, please refer to p.32 to 33.
CLEARANCES
Maintain all clearances around
the water heater.
Model Top Bottom Front Back Sides
140 Indoor
(T-H3M-DV)
12 in.
(305 mm)
12 in.
(305 mm)
4 in.*
(102 mm)
1 in.
(25 mm)
3 in.
(76 mm)
140 Outdoor
(T-H3M-OS)
36 in.
(914 mm)
12 in.
(305 mm)
24 in.
(610 mm)
1 in.
(25 mm)
3 in.
(76 mm)
*24 inches recommended for maintenance
Top
Back
Side
Side
Front
Boom
Do not install this water heater under an
overhang less than 3 ft. (914 mm) from its top,
top of exhaust part, or eaves. The area under
an overhang must be open to three sides.
(Outdoor models only)
Do not install the water heater exhaust port
within 1 ft. (305 mm), in the USA, of any air
intake or building opening, and within 3 ft. (914
mm), in Canada, of any air intake or building
opening. (Outdoor models only) (Refer to p.17).
3 ft.
(914 mm)
exhaust port
A
A: 1 ft. (305 mm) USA/3 ft. (914 mm) Canada
A
A
10 Page
Installaon
Installaon Manual
VENTING INSTRUCTIONS
For the 140 Indoor (T-H3M-DV) model
-General-
• Improper venting of this appliance can result in excessive levels of carbon
monoxide which can result in severe personal injury or death.
• Improper installation can cause nausea or asphyxiation, severe injury or death
from carbon monoxide and flue gases poisoning. Improper installation will
void product warranty.
DANGER
When installing the vent system, all applicable national and local codes must be
followed. If you install thimbles, fire stops or other protective devices and they
penetrate any combustible or noncombustible construction, be sure to follow all
applicable national and local codes.
CAUTION
The Indoor model must be vented in accordance with the section “Venting of Equipment" of the current
edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the United States and/or Section 8 of the
B149.1 Natural Gas and Propane Installation Code in Canada, as well as applicable local building codes.
The use of venting materials approved for Category III/IV appliances is recommended whenever possible.
However, the Indoor model may also be vented with plastic pipe materials such as ABS, PVC (solid core),
CPVC (solid core), or Polypropylene. For details, please refer to the Exhaust Vent (ABS, PVC, CPVC, or
Polypropylene Vent) section on p. 11. Vent installations in Canada which utilize plastic vent systems must
use venting that complies with ULC S636.
General rules for venting water heaters are:
• Place the water heater as close as possible to the vent termination.
• The vent collar of the water heater must be fastened directly to an unobstructed vent pipe.
• Do not weld the vent pipe to the water heaters vent collar.
• Do not cut or alter the vent collar of the water heater.
• The vent must be easily removable from the top of the water heater for normal service and
inspection of the unit.
• The water heater vent must not be connected to any other gas appliance or vent stack.
• Avoid using an oversized vent pipe or using extremely long runs of the pipe.
• For rooftop venting, a rain cap or other form of termination that prevents rain water from
entering into the water heater must be installed.
• Do not terminate the vent into a chimney. If the vent must go through the chimney, the vent
must run all the way through the chimney with approved vent pipe.
Water heater vent terminator must be at least 2
ft. (610 mm) away from an inside corner for both
outdoor installation and direct-vent installation.
Inside
Corner
2 ft.
(610 mm)
11 Page
Installaon
Installaon Manual
-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)-
The Indoor model can be vented with ABS, PVC, CPVC, or polypropylene (temperature rated up to at
least 149 °F). Vent material certified to ULC S636 standards is recommended in the USA. In Canada,
plastic venting must be certified to ULC S636 standards.
Item Material United States Canada
Exhaust pipe and
Fittings
Schedule 40 PVC ANSI/ASTM D1785
ULC S636 Certified
Materials Only
PVC-DWV ANSI/ASTM D2665
Schedule 40 CPVC ANSI/ASTM F441
Schedule 40 ABS-DWV ANSI/ASTM D2661
Polypropylene UL-1738
Pipe Cement/Primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
ABS ANSI/ASTM D2235
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel®
(polyphenylsulfone) in non-metallic venting systems is prohibited.
Covering non-metallic vent pipe and fittings with thermal insulation is prohibited.
• The maximum length of exhaust vent piping must not exceed 70 ft. (21.3 m) for 3” venting, which
depends on the elevation where the water heater is installed, and 100 ft. (30.5 m) for 4” venting
(deducting 5 ft. (1.5 m) for each elbow used in the venting system). Do not use more than 5
elbows. See the table below.
• When the horizontal vent run exceeds 5 ft. (1.5 m), support the vent run at 3 ft. (0.9 m) intervals
with overhead hangers.
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.
For details on the vent connection, refer to p. 13 to 16.
No. of
Elbow
2" venting 3" venting 4" venting
0 to 3,000 ft 0 to 3,000 ft 3,001 to 6,000 ft 6,001 to 10,100 ft 0 to 10,100 ft
0 6.5 ft. (2.0 m) 70 ft. (21.3 m) 40 ft. (12.2 m) 25 ft. (7.6 m) 100 ft. (30.5 m)
1 1.5 ft. (0.5 m) 65 ft. (19.8 m) 35 ft. (10.7 m) 20 ft. (6.1 m) 95 ft. (29.0 m)
2 N/A 60 ft. (18.3 m) 30 ft. (9.1 m) 15 ft. (4.6 m) 90 ft. (27.4 m)
3 N/A 55 ft. (16.8 m) 25 ft. (7.6 m) 10 ft. (3.0 m) 85 ft. (25.9 m)
4 N/A 50 ft. (15.2 m) 20 ft. (6.1 m) N/A 80 ft. (24.4 m)
5 N/A 45 ft. (13.7 m) N/A N/A 75 ft. (22.9 m)
Excludes vent terminators, one termination elbow, or rain caps.
Max. Vertical or Horizontal (Total) Vent Lengh
General rules for vent terminations:
• Avoid locating the water heater vent termination near any air intake devices. These fans can
pick up the exhaust flue products from the water heater and return them to the building. This
can create a health hazard.
• Locate the vent termination so that it cannot be blocked by any debris, at any time. Most codes
require that the termination be at least 12 inches (305 mm) above grade, but the installer may
determine if it should be higher depending on the job site condition and applicable codes.
• A proper sidewall termination is recommended when the water heater is vented through a
sidewall.
• Regarding the clearances from the exhaust termination to the air inlet or opening, refer to p. 17
to 19.
12 Page
Installaon
Installaon Manual
-DIPswitch settings for Vent length-
Vent length Two-pipe and Single pipe
5 to 50 ft.
(DEFAULT)
No. 6 : ON
No. 7 : OFF
51 to 100 ft.
No. 6 : OFF
No. 7 : OFF
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
Vent length Two-pipe
5 to 20 ft.
(DEFAULT)
No. 6 : ON
No. 7 : OFF
21 to 40 ft.
No. 6 : OFF
No. 7 : OFF
41 to 70 ft.
No. 6 : ON
No. 7 : ON
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
Set DIPswitches shown in the tables below depending on the vent length. Only adjust switches with a black
square. Black squares indicate the position of the switch.
Vent length Single pipe
5 to 45 ft.
(DEFAULT)
No. 6 : ON
No. 7 : OFF
46 to 70 ft.
No. 6 : OFF
No. 7 : OFF
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
Vent length Single pipe
5 to 6.5 ft.
No. 6 : ON
No. 7 : ON
OFF
ON
1 2 3 4 5 6 7 8 9 10
2 inch venting
3 inch venting
4 inch venting
13 Page
Installaon
Installaon Manual
-Intake and Exhaust Venng Illustraons-
Typical installaons using ABS, PVC, CPVC, or polypropylene vent
2 inch vent installaon
For details of the optional items, refer to the Installation manual for each optional item.
Single pipe with room-air intake
Termination
Hanger
1. Connecta3"elbowdirectlyonthe
intake vent collar of the water heater.
2. Connecta3"x2"reducerdirectlyon
the exhaust vent collar of the water
heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
3. Connecta2"straightpipeto
the reducer.
Vent connections for single pipe
*The water heater came with a metal screen
that will fit into a 3 inch elbow.
* 3" elbow with bird
screen
Intake vent
collar
(Female)
3"x2" reducer
2" straight pipe
Exhaust vent
collar (Female)
Refer to pages 17 and 19 for clearance information
14 Page
Installaon
Installaon Manual
3 inch vent installaon
1. Connecta3"elbowdirectlyonthe
intake vent collar of the water heater.
2. Connecta3"coupling directly on the
exhaust vent collar of the water heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
3. Connecta3"straightpipeto
the coupling.
Exhaust
vent collar
(Female)
3" straight pipe
3" coupling
(included)
Intake vent
collar
(Female)
3" straight pipe
1. Connect3"couplingsdirectlyon
the exhaust and intake vent collar
of the water heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
2. Connect3"straightpipestothe
couplings.
For details of the optional items, refer to the Installation manual for each optional item.
Vent connections for two-pipe
Vent connections for single pipe
3" coupling (included)
3" straight pipe
Exhaust
vent collar
(Female)
* 3" elbow with
bird screen
Intake vent
collar
(Female)
*The water heater came with a metal screen
that will fit into a 3 inch elbow.
For details of the optional items, refer to the Installation manual for each optional item.
1. Connect3"x4"increasers
directly on the exhaust and intake
vent collar of the water heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
2. Connect4"straightpipesto
the increasers.
4" straight
pipe
3"x4" increaser
Exhaust
vent
collar
(Female)
Intake vent
collar
(Female)
4" straight
pipe
3"x4"
increaser
4" straight pipe
3"x4" increaser
Exhaust vent
collar (Female)
* 3" elbow with
bird screen
Intake vent
collar
(Female)
1. Connecta3"elbowdirectlyonthe
intake vent collar of the water heater.
2. Connecta3"x4"increaser directly on
the exhaust vent collar of the water
heater.
Make sure the couplings engage
the o-rings installed in the intake
and exhaust vent collars
3. Connecta4"straightpipeto
the increaser.
Vent connections for two-pipe
Vent connections for single pipe
*The water heater came with a metal screen
that will fit into a 3 inch elbow.
4 inch vent installaon
3" coupling
(included)
15 Page
Installaon
Installaon Manual
Two-pipe, direct-vent Single pipe with room-air intake
Terminations
Wall
Hanger
Hanger
Roof
Roof flashing
Fire stop
Termination
Wall
Hanger
Roof flashing
Fire stop
Roof
Refer to pages 17 and 19 for clearance information
Examples of installaon of 3 inch & 4 inch vent
16 Page
Installaon
Installaon Manual
Vent connecons for two-pipe
4" stainless
steel vent
straight pipe
Exhaust vent
collar (Female)
Intake vent collar
(Female)
4" stainless
steel vent
straight pipe
Exhaust vent
collar (Female)
4" stainless
steel vent
straight pipe
Intake vent
collar
(Female)
4" elbow
with bird
screen
1. Connecta4"stainlesssteelvent
straight pipes directly on the
exhaust vent collar of the
water heater.
2. Connecta4"elbowdirectly
on the intake vent collar of the
water heater.
1. Connect4"stainlesssteelvent
straight pipes directly on the
exhaust/intake vent collar of the
water heater.
For details of the optional items, refer to the Installation manual for each Optional item.
-Exhaust vent (Stainless steel vent)-
This is a Category IV appliance and must be vented accordingly. The vent system must be sealed airtight.
All seams and joints without gaskets must be sealed with high heat resistant silicone sealant or UL listed
aluminum adhesive tape having a minimum temperature rating of 160 °F. For best results, a vent system
should be as short and straight as possible.
• The Indoor model is a Category IV appliance and must be vented accordingly with any 4 inch vent
approved for use with Category III/IV or Special BH type gas vent.
• The manufacturer recommends the NovaVent (Z-Vent) line. However, the following are also UL
listed manufacturers: ProTech Systems Inc. (FasNSeal), Metal-Fab Inc., and Heat-Fab Inc. (Saf-T
Vent).
• Follow the vent pipe manufacturers instructions when installing the vent pipe.
• The maximum length of exhaust vent piping must not exceed 100 ft. (30.5 m) (deducting 5 ft. (1.5
m) for each elbow used in the venting system). Do not use more than 5 elbows.
• When the horizontal vent run exceeds 5 ft. (1.5 m), support the vent run at 3 ft. (0.9 m) intervals
with overhead hangers.
Diameter Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
4 in. (102 mm) 5 100 ft. (30.5 m )
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.
No. of Elbows Max. Vertical or Horizontal Vent Length
0 100 ft. (30.5 m)
1 95 ft. (29.0 m)
2 90 ft. (27.4 m)
3 85 ft. (25.9 m)
4 80 ft. (24.4 m)
5 75 ft. (22.9 m)
Excludes vent terminators, termination elbows, or rain caps.
Vent connecons for single pipe
17 Page
Installaon
Installaon Manual
-Vent terminaon clearances-
Canada U.S.A
Direct-vent and other
than Direct-vent
Direct-
vent
Other than
Direct-vent
A
Clearance above grade, veranda, porch, deck, or
balcony
1 foot 1 foot 1 foot
B Clearance to window or door that may be opened 3 feet 1 foot
4 feet from below or
side opening. 1 foot
from above opening
C Clearance to permanently closed window * * *
D
Vertical clearance to ventilated soffit located above
the vent terminator within a horizontal distance
of 2 feet (61cm) from the center line of the
terminator
* * *
E Clearance to unventilated soffit * * *
F Clearance to outside corner * * *
G Clearance to inside corner * * *
H
Clearance to each side of center line extended
above meter/regulator assembly
3 feet * *
I Clearance to service regulator vent outlet 3 feet * *
J
Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
application
3 feet 1 foot
4 feet from below or
side opening. 1 foot
from above opening
K Clearance to mechanical air supply inlet 6 feet 3 feet 3 feet
L
Clearance above paved sidewalk or paved driveway
located on public property
7 feet * 7 feet
M Clearance under veranda, porch deck, or balcony 1 foot * *
*For clearances not specified in ANSI Z223.1 / NFPA 54 (US) or B149.1 (Canada), please use clearances in accor-
dance with local installation codes and the requirements of the gas supplier.
INSIDE CORNER DETAIL
V
Gas meter / regulator
V
V
V
V
V
V
V
V
V
X
X
X
Vent terminal
Air supply inlet
Area where is not permitted
G
A
E
D
B
L
C
F
B
B
B
B
A
J
OPERABLE
FIXED
CLOSED
B
H
M
K
OPERABLE
FIXED
CLOSED
I
18 Page
Installaon
Installaon Manual
For multiple sidewall exhaust terminations, an exhaust
termination must be at least 1 ft. (305mm) away from
another exhaust termination. An exhaust termination
must also be at least 2 ft. (610 mm) away from an inside
corner. (If the adjacent wall is less than 2 ft. (610 mm) of
length, the minimum required distance away from the
inside corner will be equal to the length of that adjacent
wall.)
Exhaust
termination
Inside
corner
1 ft.
(305 mm) min.
2 ft.
(610 mm) min.
1 ft. (305 mm)
min.
For multiple, direct-vent sidewall terminations that
combine the intake and exhaust into a single penetration,
space each direct-vent termination at least 1 ft. (305 mm)
away from each other, no matter the orientation. A direct-
vent termination must also be at least 2 ft. (610 mm) away
from an inside corner. (If the adjacent wall is less than 2 ft.
(610 mm) of length, the minimum required distance away
from the inside corner will be equal to the length of that
adjacent wall.)
Combined
intake and
exhaust
termination
Inside
corner
1 ft.
(305 mm) min.
2 ft.
(610 mm) min.
1 ft. (305 mm)
min.
For direct-vent sidewall
terminations that use two
separate penetrations for
the intake and exhaust,
keep the termination
clearances shown in the
diagrams on the right.
Exhaust
Intake
1 .
(305 mm)
min.
Exhaust
Intake
A
A
<Case 2>
Exhaust
Intake
1. (305 mm)
min.
Exhaust
Intake
A
<Case 1>
A
A: 0.5 ft. (159mm)
The clearance of A is recommended on the basis of the structure of the water heater.
* 3inch and 4 inch vent installations only
19 Page
Installaon
Installaon Manual
<For rooop terminaons>
Exhaust and/or direct-vent sidewall terminations should
be at least 2 ft. (610 mm) away from an opposite surface/
wall. Do not place the termination directly in front of an
opening into a building.
Intake air
Exhaust gas
3  (914 mm) min.
B
A
2  (610 mm) min.
Intake air
B
B
A
Exhaust
Gas
A:Exhaust terminations must be at least 1 ft. (305 mm) away from any obstructions.
B:Intake terminations must be at least 1 ft. (305 mm) away from any obstructions.
Exhaust
termination
2 ft. (610 mm)
min.
Please follow all local and national codes in regards to proper termination
clearances. In the absence of such codes, the clearances above can be used as
guidelines. Local codes supersede these guidelines.
CAUTION
20 Page
Installaon
Installaon Manual
GAS SUPPLY AND GAS PIPE SIZING
-General-
• The minimum and maximum inlet gas pressures are:
• Inlet gas pressures that fall outside the range of values listed above may adversely affect the
performance of the water heater. These pressures are measured when the water heater is in full
operation.
• Inlet gas pressure must not exceed the above maximum values; gas pressure above the specified range
will cause dangerous operating conditions and damage to the water heater.
• Until testing of the main gas line supply pressure is completed, ensure the gas line to the water heater
is disconnected to avoid any damage to the water heater.
-Gas connecons-
1. Install a manual gas shutoff valve between the water heater and the gas supply line. The gas supply
line shall be checked for leaks using code approved methods.
2. When the gas connections are completed, it is necessary to perform a gas leak test either by applying
soapy water to all gas fittings and observing for bubbles or by using a gas leak detection device.
• The water heater and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of 1/2 psi
(3.5 kPa).
• The water heater must be isolated from the gas supply piping system by closing its individual
manual shutoff valve during any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psi (3.5 kPa).
3. Always purge the gas line of any debris and/or water before connecting to the gas inlet.
Size the gas pipe appropriately to supply the necessary volume of gas required for
the water heater using ANSI Z223.1/NFPA 54 in the USA or B149.1 in Canada or
local codes. Otherwise, flow capabilities and output temperatures will be limited.
NOTICE
Gas type Inlet gas pressure
Natural Gas Min. 4.0” W.C. (1.00 kPa) – Max. 10.5” W.C. (2.61 kPa)
Propane Min. 8.0” W.C. (1.99 kPa) – Max. 14.0” W.C. (3.48 kPa)
• Check that the type of gas matches the rating plate first.
• Ensure that any and all gas regulators used are operating properly and
providing gas pressures within the specified range shown below. Excess gas
inlet pressure may cause serious accidents.
• Conversion of this water heater from natural gas to propane or vice versa will
void all warranty. Contact your local distributor to get the correct unit for your
gas type. The manufacturer is not liable for any property and/or personal
damage resulting from gas conversions.
CAUTION
21 Page
Installaon
Installaon Manual
-Natural Gas Supply Piping-
Maximum delivery Capacity of Cubic Feet of Gas per Hour of IPS Pipe carrying Natural Gas with 0.60 Specific Gravity
Based on Pressure Drop of 0.5" W.C.
Based on Energy Content of 1,000 BTU/Cubic ft.: The water heater requires 120 Cubic ft./hr for the 140 (T-H3M)
model.
-Propane (LP) Supply Piping-
Maximum Capacity of Propane (LP) Based on 11" W.C. supply pressure at a 0.5" W.C. pressure drop
Pipe Size Length
Diameter 10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125' 150' 200'
1/2"
172 118 95 81 72 65 60 56 52 50 44 40 34
3/4"
360 247 199 170 151 137 126 117 110 104 92 83 71
1" 678 466 374 320 284 257 237 220 207 195 173 157 134
1
1/4"
1,309 957 768 657 583 528 486 452 424 400 355 322 275
1
1/2"
2,090 1,430 1,150 985 873 791 728 677 635 600 532 482 412
2" 4,020 2,760 2,220 1,900 1,680 1,520 1,400 1,300 1,220 1,160 1,020 928 794
Unit: Cubic feet per hour
Water
heater
120,000 BTU/h
Dryer
35,000 BTU/h
Gas meter
Furnace
120,000 BTU/h
Range
65,000 BTU/h
A
B
C
10' Length
1/2" Pipe size
15' Length
1/2" Pipe size
15' Length
1" Pipe size
10' Length
3/4" Pipe size
10' Length
1" Pipe size
10' Length
1/2" Pipe size
10' Length
1-1/4" Pipe size
Gas sizing example
(Natural Gas)
Unit: kBTU per hour
Pipe Size Length
Diameter 10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125' 150' 200'
1/2"
268 184 148 126 112 101 93 87 82 77 68 62 53
3/4"
567 393 315 267 237 217 196 185 173 162 146 132 112
1" 1,071 732 590 504 448 409 378 346 322 307 275 252 213
1
1/4"
2,205 1,496 1,212 1,039 913 834 771 724 677 630 567 511 440
1
1/2"
3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976 866 787 675
2" 6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811 1,606 1,496 1,260
Based on Energy Content of 1,000 BTU/Cubic ft:
Divide each appliance's BTU/h requirement by 1,000 BTU/ft
3
to get the appliances ft
3
/h requirement.
Take into account the distance the appliance is from the gas meter, look in the above gas chart to properly size the line.
For sections of the gas line supplying gas to more than one appliance (Ex: Point A to Point B), add up the cubic ft. per hour
requirements of the appliances that are being supplied by that section, and size to the farthest appliance.
For Example: The section from A to B supplies gas to the furnace, range and dryer. Adding up the BTU/h requirements and
dividing by 1,000 yields a cubic ft. per hour requirement of 220 cubic ft. of gas per hour. The farthest appliance is the range,
which is 50 ft. away from the meter. Looking at the above chart, and under the column of 50 ft., Section A to B needs to be 1"
in order to supply 220 cubic ft.
22 Page
Installaon
Installaon Manual
-Measuring inlet gas pressure-
The water heater cannot perform properly without sufficient inlet gas pressure. Below are instructions on
how to check the inlet gas pressure. THIS IS ONLY TO BE DONE BY A LICENSED PROFESSIONAL.
WATER CONNECTIONS
All pipes, pipe fittings, valves and other components, including soldering materials, must be suitable for
potable water systems.
1. A manual shutoff valve must be installed on the cold water inlet to the water heater between the main
water supply line and the water heater.
2. In addition, a manual shutoff valve is also recommended on the hot water outlet of the water heater.
If the water heater is installed within, or subjected to, a closed loop water system, a thermal expansion
tank or code approved device to handle thermal expansion must be installed. We recommend isolation
valve sets with hose bibs for serviceability such as flushing. See maintenance and service section.
1. Turn off all electric power to the water heater if service is to be performed.
2. Turn the manual gas valve located on the outside of the water heater clockwise
to the off position.
1. Shut off the manual gas valve on the gas supply line.
2. Remove the screw for the pressure port located on the
gas inlet of the water heater shown in the diagram on
the right.
3. Connect the manometer to the pressure port.
4. Re-open the manual gas valve. Check to see that there
are no gas leaks. Take a reading of the gas pressure.
Open some of the fixtures that use the highest flow rate
to turn on the water heater.
5. Check the inlet gas pressure. Take another reading.
When the water heater is on maximum and minimum
burn, the manometer should read from 4.0” to 10.5”
W.C. (1.00 to 2.61 kPa) for Natural gas, or from 8.0” to
14.0” W.C. (1.99 to 3.48 kPa) for Propane. Verify that the
pressure drop is acceptable.
3. Before installing the water heater, flush
the water line to remove all debris, and
after installation is complete, purge
the air from the line. Failure to do so
may cause damage to the heater.
4. There is a wire mesh filter within
the cold inlet to trap debris from
entering your heater. This will need
to be cleaned periodically to maintain
optimum flow. (Refer to p. 41.)
Cold
inlet
Hot
outlet
Gas inlet
As Close as
Possible
Pressure relief valve
Pressure port
• Do not use this appliance if any part has been under water. Immediately contact
a qualified installer or service agency to replace a flooded water heater. Do not
attempt to repair the unit! It must be replaced!
WARNING
23 Page
Installaon
Installaon Manual
Follow all code requirements
of the local authority on
condensate neutralizers and
whether or not they are required
for the installation.
Condensate drain port
-Pressure relief valve-
The water heater has a high-temperature shutoff switch built in as a standard safety feature (called a
Hi-Limit switch) therefore a “pressure only relief valve is required.
• This water heater does not come with an approved pressure relief valve.
• An approved pressure relief valve must be installed on the hot water outlet.
• The pressure relief valve must conform to ANSI Z21.22 or CAN 1-4.4 and installation must follow local
codes.
• The discharge capacity must be at least 120,000 BTU/h for the 140 (T-H3M) models.
• The pressure relief valve needs to be rated for a maximum of 150 psi (1 MPa).
• The discharge piping for the pressure relief valve must be directed so that the hot water cannot splash
on anyone or on nearby equipment. Follow local codes.
• Attach the discharge tube to the pressure relief valve and run the end of the tube to within 6 inches
(152 mm) from the floor. This discharge tube must allow free and complete drainage without any
restrictions.
• If the pressure relief valve installed on the water heater discharges periodically, this may be due to a
defective thermal expansion tank, defective pressure relief valve, or it could be signs of internal scale
build up.
• The pressure relief valve must be manually operated periodically to check for correct operation.
• No valves may be placed between the relief valve and the water heater.
CONDENSATE DRAIN
• The water heater does not include a built-in condensate neutralizer cartridge for reducing the pH level
of condensate water. If local codes dictate that condensate must be neutralized prior to drainage, a
condensate neutralizer must be installed. An accessory Neutralizer assembly is sold separately.
• In the absence of applicable local codes and regulations, the manufacturer recommends that
condensate be disposed of into a standard drain. Connect a drain tube from the condensate drain port
(shown below) located on the bottom of the water heater to a standard drain.
24 Page
Installaon
Installaon Manual
WARNING
Discharge condensate (acidic water) in accordance with all local codes
and common safety practices.
Condensate
drain port
1/2" Condensate
drain tube
Adequate space
Drain
1/2" FPT x 3/8" MPT
(Included with
Neutralizer accessory)
Neutralizer cartridge
(Included with
Neutralizer accessory)
3/8" MPT x 1/2" HB
(Included with
Neutralizer accessory)
Drain
3/8" or 1/2"
Condensate
drain tube
Condensate
drain port
1/2" FPT x 3/8"
(or 1/2") HB
Adequate space
Case A
Case B
-Condensate Drain Connecons-
The water heater is a high efficiency condensing model that produces condensate (acidic water). The
acidic condensate generated in the secondary heat exchanger can be neutralized by the Neutralizer acces-
sory.
Case A: If a neutralizer is not required
1. Connect a 1/2” FPT X 3/8” (or 1/2”) HB Adaptor to the condensate drain port at the bottom of the
water heater.
2. Connect a condensate drain tube to the 1/2” FPT X 3/8” (or 1/2”) HB Adaptor. The manufacturer
recommends the material of the condensate tube be either EPDM or PVC.
3. Leave an adequate amount of space between the end of the drain tube and the actual drain, to
facilitate proper drainage.
Case B: If a neutralizer is required (installing the Neutralizer assembly)
1. Connect the 1/2” FPT X 3/8” MPT Adaptor to the condensate drain port at the bottom of the water
heater.
2. Connect the Neutralizer to the 3/8” MPT connection of the adaptors. There is a flow direction indicator
on the neutralizer. Please orient the neutralizer in the proper direction.
3. Connect a 1/2” drain tube to the other end of neutralizer.
4. Leave an adequate amount of space between the end of the drain tube and the actual drain, to
facilitate proper drainage.
25 Page
Installaon
Installaon Manual
• Follow the electrical code requirements of the local authority having jurisdiction.
In the absence of such requirements, follow the current edition of the National
Electrical Code ANSI/NFPA 70 in the U.S. or the current edition of CSA C22.1
Canadian Electrical Code Part 1 in Canada.
• When servicing or replacing parts within the water heater, label all wires prior
to disconnection to facilitate an easy and error-free reconnection. Wiring errors
can cause improper and dangerous operation. Verify proper operation after
servicing.
• Failure to observe these warnings could result in personal injury or loss of life.
WARNING
• The condensate drain is at atmospheric pressure (non-pressurized) and
therefore must be allowed to drain freely with gravity only. Please ensure that
there are no blockages along the condensate drain tube. All portions of the
condensate drain (neutralizer and drain tube) must be at a lower elevation
than the water heater to prevent condensate water from building up inside
the heat exchanger.
• Condensate cannot be effectively neutralized if the neutralizer elements inside
the Neutralizer accessory have been completely consumed. If this happens,
condensate will remain acidic and can possibly cause damage to items such as
pipes, concrete, etc., if drained improperly.
• The Neutralizer cartridge is designed to last for 3 years before replacement.
However, the actual life of the neutralizer may vary, depending on the
application and usage. Please ensure that the cartridge is properly replaced
before the neutralizer elements have been completely consumed.
• All preventative measures and safety practices must be adhered to when
draining condensate. The manufacturer will not be responsible for any damage
caused by condensate.
• A drain pan, or other means of protection against water damage, is required to
be installed under the water heater in case of leaks.
WARNING
Outdoor model
Boomviewofwaterheater
View of electrical
conneconsofwaterheater
Indoor model
Connect
Power supply
120VAC, 60Hz
Ground
Green screw
ELECTRICAL CONNECTIONS
All Indoor models come with a power plug instead of a junction box. The following procedure is for
the outdoor model only.
1. The water heater must be electrically grounded. Do not attach the ground wire to either the gas or
the water piping.
2. The water heater requires 120 VAC, 60 Hz electrical power supply that is properly grounded.
• A proper disconnect (i.e. on/off switch, power plug, etc.) controlling the main power to the water
heater must be provided for service reasons. (Must comply with local codes.)
• Connect the power supply to the water heater exactly as shown in the wiring diagram.
3. A green screw is provided in the junction box to ground the connection.
4. Can be hardwired or wired to a plug-in.
5. The use of a surge protector is recommended in order to protect the water heater from power surges.
26 Page
Installaon
Installaon Manual
Fig. B
Back plate
3-1/4 inches
Attach the screws
Cut out the partition with pliers
Main body
Fig. A
Main body
Twist
Press and twist flat head
screwdriver against the cutout.
Only the outdoor model comes with the temperature remote controller
Check that these items below are included with the remote controller.
Temperature
Remote Controller*
Screws Manual Remote Controller Cable
Qty: 1
Qty: 1
Qty: 2Qty: 1
TEMPERATURE REMOTE CONTROLLER
-INSTALLATION-
<Mounting and Wiring the Remote Controller>
1. TakeofftheBack plate” from the remote controller with a flat head screwdriver. (Fig. A and B)
2. Attachthe“Back plate” on the wall with the two provided screws. (Fig. B)
• This remote controller is NOT waterproof
Do not install in high temperature environments, steamy conditions (such as a
bathroom), outdoors, in direct sunlight, or within the reach of children.
Make sure the remote controller does not come into contact with water or oil.
• Do not place the remote control wiring close to other wires from other
products.
• Do not extend the remote control wiring more than 400 ft. (122 m).
CAUTION
9009069005/TM-RE42
*It is also an optional accessary as a second remote for the indoor model. Refer to p. 32.
27 Page
Installaon
Installaon Manual
Remote controller
terminals
Fig. C-1
Two fork terminals
Remote controller cable
Inlet for the remote
controller cable
Cut out
Fig. C-2
3. Tightenthetwo"Fork terminals" beneath the two "Remote controller terminal" screws,
which are not polarity-sensitive, on the back of the main body. (Fig. C-1)
4. Cut out the inlet for the remote controller cable from the bottom of the main body. (Fig. C-2)
5. Placethe“Main body” back on the "Back plate", with the "Remote controller cable" running
out of the bottom inlet.
<How to connect the remote controller to the water heater>
1. Disconnectpowersupplyfromthewaterheater.
2. Takeoffthewaterheatersfrontcover.
3. Locatetheremotecontrollerterminals,picturedbelow(locatedaroundthelower
right-hand side of the computer board).
4. Takeoffthebackplatefromtheremotecontroller,andthenattachthetwoforkterminalsto
connector base on the backside of the remote controller with two screws. Make sure the
terminals are firmly fixed.
5. Pulltheremote’swiresthroughtheholeatthebottomofthewaterheaterscasing.
6. Properlyattachtheremote’swirestotheremotecontrollerterminalonthecomputerboard
(No polarity).
 * Do NOT jump or short-circuit the wires, or the computer will be damaged.
7. ReplaceFrontCoversecurely.
8. Wiresusedfortheremotecontrollerconnectionmustbe:
• Minimum 20 gauge wire (No polarity)
• Maximum 400 ft. (122 m) long
9009069005 (TM-RE42)
Connect other end to these terminals
28 Page
Installaon
Installaon Manual
HIGH-ALTITUDE INSTALLATIONS
Check the elevation where your water heater is installed. Set DIPswitches shown in the tables below
depending on the altitude.
NOTE: The dark squares indicate the direction the DIPswitches should be set to.
Only adjust the necessary switches.
Bank of DIPswitches
Computer board
Indoor model
Altitude
0 to 2,000 ft.
(DEFAULT)
2,000 to
3,000 ft.
3,000 to
5,000 ft.
5,000 to
7,500 ft.
7,500 to
10,100 ft.
DIPswitches
No. 3 : OFF
No. 4 : OFF
No. 5 : OFF
No. 3 : OFF
No. 4 : ON
No. 5 : OFF
No. 3 : OFF
No. 4 : OFF
No. 5 : ON
No. 3 : OFF
No. 4 : ON
No. 5 : ON
No. 3 : ON
No. 4 : ON
No. 5 : ON
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
Outdoor model
Altitude
0 to 2,000 ft.
(DEFAULT)
2,000 to
4,000 ft.
4,000 to
6,000 ft.
DIPswitches
No. 3 : OFF
No. 4 : OFF
No. 5 : OFF
No. 3 : OFF
No. 4 : OFF
No. 5 : ON
No. 3 : ON
No. 4 : OFF
No. 5 : ON
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
Installation altitude
The maximum certified
or allowable installed
altitude is 10,100 ft. for
indoor model and 6,000 ft.
for outdoor model.
29 Page
Installaon
Installaon Manual
• This water heater is suitable for combination water (potable) heating and
space heating and not suitable for space heating applications only.
• In order to purge air in water pipes within a closed-loop system, an air vent
and air separator should be installed in the system. Required circulation
flow rates are labeled next to each application diagram. These flow rate
requirements must be followed.
• Toxic chemicals used in boiler treatments such as alcohol, glycerol and glycol
groups must not be introduced into the system if the system incorporates an
open-loop potable water system.
• The water heater can be used to supply potable water and space heating and
shall not be connected to any heating system or component(s) previously
used with non-potable water where any chemicals were added to the water
heating appliances.
• When the system requires water for space heating at temperatures higher
than required for other uses, a means such as a mixing valve shall be installed
to temper the water for those other uses in order to reduce scald hazard
potential.
• Water temperature over 125 °F (52 °C) can cause severe burns instantly or
death from scalding.
WARNING
S
Air vent
Hotwateroutlettoxtures
Recirculaon
pump
Air
separator
Check valve
Check valve
Y-Strainer
Cold water inlet
Expansion tank
Gas supply
Ball valves
Unions
Hot water outlet
Cold water inlet
Gas inlet
APPLICATIONS
-Space-Heang Applicaons-
-Recirculaon-
*The recirculation pump is to be controlled by:
-Dual-set aquastat (recommended w/timer)
*The recirculation pump is to provide no less than 2 GPM (7.5 L/min) and no more than 4 GPM (15 L/min) through
each activated unit in the system.
This is a concept drawing only.
30 Page
• Priority Control Devices such as a flow switch, an Aquastat or other
electronic controller can be used to prioritize the domestic water system over
the heating system.
• Follow all local codes, or in the absence of local codes, follow the most recent
edition of the National Standard Code, ANSI Z21.10.3.
• This illustration is a concept design only. The reference to the 1/8
th
hole
in check is only for the State of Massachusetts. There are a wide variety
of variations to the application of controls and equipment presented.
Designers must add all necessary safety and auxiliary equipment to conform
to code requirements and design practice. For more details, contact the
manufacturer.
NOTICE
120 VAC
switch or
outlet
Hot water outlet
Unions
T-handlegasshutovalve
Check valve
Electronically controlled
pumpmer.Acvates
every 6 hours for 60
seconds. Wire to
product approved pump
Heang Coil
(used with air-handler)
Cold water supply
3-inch gas exhaust
vent (Discharge must
comply with local and
state codes.) Cannot
be common vented
with other appliances
An approved temperature and pressure
reliefvalve.Tietolocaonapprovedby
localcodesandmustmeetBTUrangof
water heater model used
Check valve will have
1/8-inch hole drilling
inclapperoponal
Atmospheric
vacuum
breaker
Shuto
valve
Pressure
gauge
Apply correct thermal
expansion tank-size
perapplicaon
Shutovalves
Shutovalves
Check valves
Cold water inlet
Gas inlet
Water
lter
Drain
plug
Thermostacmixingvalve
Hot water
supply and
return to
heangcoil
System installed with reverse
acngaquastattoshutofan.
Suggested but not required by
248 CMR
50’-0” maximum distance from
water heater to fan coil.
(Developed length) Not including
coilinheangunit
NSF-61 product
approved pump
Automactemperingdevice
must be installed below
the top of the water heater
as per manufacturers
recommendaons
Piping loop
between water
heater and fan
coil shall be in
compliance with
248 CMR
Tempered water to
plumbingxtures.Must
meet temperature
requirements of 248 CMR
All water piping should be insulated
in accordance with 780 CMR
(Massachusesenergycode)
-Dual-purpose hot water heang-
(Domestic and Space Heating):
Diagrammatic layout of radiant heating and domestic water heater per Mass. code.
The recirculation pump is to provide no less than 2 GPM (7.5 L/min) and no more than 4 GPM (15 L/min)
through each activated unit in the system.
Installaon
Installaon Manual
Ball
Valve
Isolation
Valve
31 Page
IF YOU SMELL GAS:
• Do not try to start the water heater.
• Do not touch any electric switches; do not use any phone in your building.
• Immediately call your gas supplier from a neighbors phone. Follow the gas
suppliers instructions.
• If you cannot reach your gas supplier, call the fire department.
WARNING
Operation
1.
Once the above checks have been completed, please clean filter
of any debris. Refer to p. 41 for instructions.
2.
Fully open the manual water control valve on the water supply
line.
3.
Open a hot water tap to verify that water is flowing to that tap.
Then close the hot water tap.
4.
Fully open the manual gas control valve installed.
5.
Turn on the 120 VAC, 60 Hz power supply to the water heater.
6.
Now you are ready to enjoy hours of endless hot water.
• Check the GAS and WATER CONNECTIONS for leaks before firing unit for the first time.
• Open the main gas supply valve to the water heater using only your hand to avoid any spark.
Never use tools. If the knob will not turn by hand, do not try to force it; call a qualified service
technician. Forced repair may result in a fire or explosion due to gas leaks.
• Be sure to check for the presence of leaking gas toward the bottom of the water heater because
some gases are heavier than air and may settle towards the floor.
• Check the GAS PRESSURE. Refer to p. 20 and 22.
• Do not try to light the burner manually. It is equipped with an electronic ignition device which
automatically lights the burner.
• Check for PROPER VENTING and COMBUSTION AIR to the water heater.
• Purge the GAS and WATER LINES to remove any air pockets.
• Do not use this appliance if any part has been under water. Immediately contact a qualified
installer or service agency to replace a flooded water heater. Do not attempt to repair the unit!
It must be replaced!
FOR YOUR SAFETY, READ BEFORE OPERATING
INITIAL OPERATION
Installaon
Installaon Manual
32 Page
OPTIONAL ITEMS
# Model
140
Indoor
(T-H3M-DV)
140
Outdoor
(T-H3M-OS)
1.
Temperature Remote Controller
Included with the
water heater
2.
Pipe Cover
3.
Neutralizer Kit
4.
4-inch Exhaust Sidewall Vent Terminator (Hood)
and 4-inch Wall Thimble
5.
3-inch Concentric PVC
Termination
6.
Recess Box
The pipe cover protects the plumbing pipes to
the water heater from unexpected adjustments.
This pipe cover is fixed to the bottom of the water
heater, which hides the plumbing and improves
the visual aspects of the whole installation for the
water heater.
The temperature remote controller has three functions. It allows the output temperature from the
water heater to be adjusted within the range of 100 °F to 140 °F, and also works as a diagnostic
tool and will provide a concise error code whenever there is a problem with the water heater. The
temperature options are 100 °F, 105 °F, 110 °F, 115 °F, 120 °F, 125 °F, 130 °F, 135 °F, and 140 °F. See
the troubleshooting Section for information on possible error codes.
1. Temperature Remote Controller:
9009069005 (TM-RE42)
2. Pipe Cover: 9008953005 (TH-PC04)
3. Neutralizer Kit: 9007607005 (TH-NT01)
The neutralizer assembly neutralizes
the condensate (acidic water) that
forms in the secondary heat exchanger
of the water heater.
It connects to the condensate
drain port of the water heater by
using connectors included with the
neutralizer kit. Refer to p. 23 and 24
for the details.
Installaon
Installaon Manual
33 Page
Used when terminating direct-vent (sealed combustion)
systems, with Indoor models that require a 3 in. (76 mm)
intake and a 3 in. (76 mm) exhaust. This concentric
termination provides the convenience of only having to
make one penetration through a sidewall instead of two
separate penetrations for the intake and exhaust piping. The
termination includes a bird screen, restricting small animals,
pests, and foreign objects from entering into the vent system.
4. 4-inch Exhaust Sidewall Vent Terminator (Hood) and 4-inch Wall Thimble:
They are used when venting out through the wall. These terminations are special stainless steel
vents for gas appliances and are UL listed as Category II, III and IV. For different wall thicknesses,
there are two ranges of lengths available. (Refer to the NovaVent brochure for details.) Install these
vent terminations in accordance with their installation instructions and any applicable local codes.
Discription Part#
4" Wall Thimble (4"-7")
9008345005
4" Wall Thimble (5"-10")
9008346005
4" Exhaust Sidewall Vent Terminator (Hood)
9007999005
4" Exhaust Sidewall Vent Terminator (Hood)
+ 4" Wall Thimble (4"-7")
9008004005
4" Exhaust Sidewall Vent Terminator (Hood)
+ Wall Thimble (5"-10")
9008005005
4-inch Exhaust Sidewall
Vent Terminator
(Hood)
4-inch
Wall Thimble
5. 3-inch Concentric PVC Termination: 9007611005 (TH-CVPVC33)
Installaon
Installaon Manual
6. Recess Box
The Recess box will allow for "clean" installations.
The water heater fits inside the recess box, which hides
and protects the whole water heater and plumbing.
The Recess box will fit in-between most wall studs.
34 Page
Owner's Guide
CONGRATULATIONS
Congratulations and thank you for choosing our tankless water heater.
Before use, we recommend that you read through this safety manual
carefully. Please refer to the back of the manual for details about the
warranty. Keep this manual for future reference.
If you lose the manual, contact the manufacturer or your local
distributor. When you call, please tell us the model number and the
serial number of your unit written on the rating plate of the water
heater.
Owner's Guide
35 Page
OPERATING SAFETY
Operang Safety
Owner's Guide
WARNING:
If you do not follow these instructions exactly, a fire or explosion may result
causing property damage, personal injury or loss of life.
A. This appliance does not have a pilot. It is equipped with an ignition device which automatically
lights the burner. Do not try to light the burner by hand.
B. BEFORE OPERATING smell all around the appliance area for gas. Be sure to smell next to the
floor because some gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
• Donottrytolightanyappliance.
• Donottouchanyelectricswitch;donotuseanyphoneinyourbuilding.
• Immediatelycallyourgassupplierfromaneighborsphone.Followthegassuppliers
instructions.
• Ifyoucannotreachyourgassupplier,callthefiredepartment.
C. Use only your hand to turn the gas shutoff valve. Never use tools. If the valve will not turn
by hand, don’t try to repair it, call a qualified service technician. Force or attempted repair may
result in a fire or explosion.
D. Do not use this appliance if any part has been under water. Immediately contact a qualified
installer or service agency to replace a flooded water heater. Do not attempt to repair the unit!
It must be replaced!
1. STOP! Read the safety information above on this label.
2. Turn off all electric power to the appliance.
3. Do not attempt to light the burner by hand.
4. Turn the gas shutoff valve located on the outside of the unit to the closed position.
5. Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Follow “B” in the
safety information above on this label. If you don’t smell gas, go to the next step.
6. Turn the gas shutoff valve located on the outside of the unit to the open position.
7. Turn on all electrical power to the appliance.
8. If the appliance will not operate, follow the instructions in “To Turn Off Gas to Appliance,” and
call your service technician or gas supplier.
1. Turn off all electric power to the appliance if service is to be performed.
2. Turn the gas shutoff valve located on the outside of the unit to the closed position.
FOR YOUR SAFETY READ BEFORE OPERATING
OPERATING INSTRUCTIONS
TO TURN OFF GAS TO APPLIANCE
36 Page
Operang Safety
Owner's Guide
A pressure relief valve listed as complying with the standard for Relief Valve and Automatic Gas Shutoff Devices for
Hot Water Supply System, ANSI Z21.22
CSA 4.4, shall be installed at the time of installation of the water heater
in the location specified by the manufacturer. Local codes shall govern the installation of relief devices for safety
operation of the water heater. The relief valve must not be removed or plugged.
No valve shall be placed between the relief valve and the water heater. The relief from the discharge of the pressure
relief valve shall be disposed of in a suitable place where it will cause no damage. Also, there shall be no other
reducing coupling or other restrictions installed on the discharge line to restrict flow.
See Installation Manual heading “PRESSURE RELIEF VALVES” for installation and maintenance of relief valve discharge
line and other safety precautions.
Vapors from flammable liquids will explode and catch fire causing death or severe burns.
Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or area near
the water heater.
Keep flammable products:
1. Far away from heater.
2. In approved containers.
3. Tightly closed and out of reach of children.
4. Water heater has a main burner, which may come
on at any time and will ignite flammable vapors.
Vapors:
1. Cannot be seen.
2. Are heavier than air.
3. Go a long way on the floor.
4. Can be carried from other rooms to the main
burner by air currents.
Do not install water heater where flammable products will be stored or used
unless the main burner is at least 18” above the floor. This will reduce,
but not eliminate the risk of vapors being ignited by the main burner.
Read and follow water heater warnings and instructions. If the owner’s manual is
missing, contact the retailer or manufacturer.
Flammable Vapors
FLAMMABLES
1. Water temperature over 125°F (52°C) can cause severe burns instantly or death from scalds.
2. Children, disabled and elderly are at highest risk of being scalded.
3. Feel water before bathing or showering.
4. Temperature limiting valves are available. See manual.
5. The outlet temperature of the water heater is set at 120°F (50°C). If you require water temperatures below this
setting, follow the instruction manual.
6. Use this heater at your own risk. Test the water before bathing or showering. Do not leave children or an infirm
person unsupervised. See your local water supply company [plumbing hardware retailer] for temperature limiting
valves that are available.
BRÛLURE
BURN
CHAUDECHAUDE
HOTHOT
CHAUDE
HOT
DANGER
DANGER
37 Page
DISPLAY OF THE CONTROLLER
Theillustraonbelowshowsanexampleofthedisplayofthecontrollers.Theexactdisplaymaydierfromexamples.
• Flow rate to activate the water heater: 0.5 gallon per minute at the default set
temperature (1.9 L/min).
• Flow rate to keep the water heater running: 0.4 gallon per minute (1.5 L/min)
• The controllers have an energy saving mode. Five minutes after the water heater
stops operating, the backlight of the controller turns off.
• The backlight of the controller will turn back on once the water heater begins
firing again.
• This water heater is an on-demand, tankless water heater designed to efficiently
supply endless hot water without reference to temperature settings.
1. Open a cold water
fixture.
2. Mix hot water with the cold water
to get the correct temperature water.
3. When finished, close
the water fixture.
NORMAL OPERATION
°F 100 105 110 115 120* 125 130 135 140
°C 38 40 43 45 50* 52 55 57 60
*Factory setting (Default)
TEMPERATURE TABLE OF THE CONTROLLER
"COLD" Button
"HOT" Button
Press the "HOT" button or the "COLD"
button to set the hot water temperature.
"ON/OFF" Button
Press this button to start
or stop operation.
STAND BY LED (Orange)
The indicator turns on when the
heater is ready for operation.
IN USE LED (Green)
The indicator lights during combustion.
When the STAND BY LED is ON, the
hot water set temperature will be
displayed.
Display for Temperature
"INFO" Button
Eachmethebuonispressed,
theoperaonmodeisselected
in the following sequence.
Inlet water
temperature
Outlet water
temperature
Water
ow
The controllers indicate the remote controller (9009069005/TM-RE42) and the
temperature controller attached to a surface of the 140 Indoor (T-H3M-DV) model.
NOTICE
Normal Operaon
Owner's Guide
GENERAL
Temperature above 125 °F (52 °C) can cause severe burns or death from scalding.
Children, disabled and the elderly are at high risk of being injured.
CAUTION
38 Page
TEMPERATURE SETTINGS
-Using controller-
-Temperature seng on the PCB-
(Without controller)
There are 2 preset temperatures (120 °F (50 °C) and 140 °F (60 °C)) that you can select from by changing
the DIPswitch settings on the computer board without the controller. See the table below.
When the controller is in normal operation, the set temperature of the controller is given
priority over the set temperature of the DIPswitch settings. If the remote becomes disabled, the com-
puter will refer to the setting of this DIPswitch.
The temperature has been preset at the factory to 120 °F (50 °C).
Computer board
Bank of
DIPswitches
NOTE: Only change the switches with dark squares. The dark squares
indicate the direction the DIPswitches should be set to.
120 °F (50 °C)
DEFAULT
140 °F (60 °C)
No. 9 : OFF
No. 9 : ON
OFF
ON
1 2 3 4 5 6
7 8 9
10
OFF
ON
1 2 3 4 5 6 7 8 9 10
Normal Operaon
Owner's Guide
Operation Screen on the controller
1.
Turn on the 120 VAC power supply to the water heater.
2.
Press the "ON/OFF" button on the controller in order to
turn the controller on.
3.
When ON, the STAND BY LED is lit.
4.
It shows the set temperature on its display as shown in
the picture on the right. (EX.: 120 °F)
5.
Press the "HOT" button or the "COLD" button to set the
temperature setting of the unit.
Increasing temperature
from 120 °F (50 °C) to 125 °F (52 °C) :
1. The water heater must be Stand By to increase the
temperature.
2. Press the "HOT" button to set 120 °F (50 °C).
3. Press and hold the "INFO" button and the "HOT"
button for at least 3 seconds. The remote will emit a
beep and change to 125 °F (52 °C).
4. Press the "HOT" button to set up to 140 °F (60 °C).
(EX.: 120 °F)
39 Page
Operation Screen on the controller
1.
Inlet water temperature will be displayed on the
controller by pressing the "INFO" button.
2.
Outlet water temperature will be displayed on the
controller by pressing the "INFO" button.
3.
Water flow rate, in gpm, will be displayed on the
controller by pressing the "INFO" button.
4.
Press the "INFO" button to finish information mode.
Inlet water temperature
(EX.: 60 °F)
Outlet water temperature
(EX.: 120 °F)
Water flow
(EX.: 3.5 GPM)
-Informaon mode-
-Unit conversion mode-
When the water heater is connected with the remote controller, the temperature
controller will not operate temperature settings, as only work for the information
mode (Indoor model only).
Operation Screen on the controller
1.
Press the "ON/OFF" button on the controller in
order to turn the controller on.
2.
When ON, the orange LED is lit.
3.
The previous set temperature will be displayed on
the screen.
4.
Press the "INFO" buttons for at least 3 seconds.
5.
The set temperature should now be displayed in the
alternate unit of measurement.
(EX.: 100 °F)
(EX.: 38 °C)
ADDTIONAL FEATURES
You can get some information about the water heater condition by pressing the "INFO" button. For more
information, follow the procedures below:
The controller display information can be changed from English Units to S.I. / metric units.
Please follow the procedures below:
Normal Operaon
Owner's Guide
40 Page
FLOW
• This water heater comes equipped with heating blocks to protect it against damage associated with
freezing.
• For this freeze protection system to operate, there has to be electrical power to the water heater.
Damage to the heat exchanger caused by freezing temperatures due to power loss is not covered
under the warranty. In cases where power losses can occur, consider the use of a backup power supply.
• The freeze protection system will activate when the freeze protection thermostat senses air temperature below
36.5 °F (2.5 °C).
• For the 140 Indoor (T-H3M-DV) model:
• In any areas subject to freezing temperatures, the manufacturer highly recommends an indoor
installation with an indoor model. In such an installation, freezing issues can only occur if cold
air enters through the venting into the heat exchanger, whether by negative pressures within
the installation location or by strong outside winds.
• The manufacturer also highly recommends the use of a backflow preventer (sold separately)
to minimize the amount of cold air entering through the exhaust venting when the water
heater is off.
• It is the installer’s responsibility to be aware of freezing issues and take all preventative measures. The
manufacturer will not be responsible for any damage to the heat exchanger as a result of freezing.
• If you will not be using your heater for a long period of time:
1. Completely drain the water out of the water heater. Refer to p. 41.
2. Disconnect power to your heater.
This will keep your water heater from freezing and being damaged.
Only pipes within the water heater are protected by the freeze protection
system. Any water pipes (hot or cold) located outside the water heater will not
be protected. Properly protect and insulate these pipes from freezing.
CAUTION
FREEZE PROTECTION SYSTEM
Appliance/Use
Flow rate
GPM (US) L/min
Lavatory Faucet 1.0 3.8
Bath Tub 4.0 – 10.0 15.2 - 37.8
Shower 2.0 7.5
Kitchen Sink 1.5 5.6
Dishwasher 1.5 5.6
Washing machine 4.0 15.2
Household Flow Rates
Taken from UPC 2006
• The flow rate through the water heater is limited to
a maximum of 7.0 GPM (26.5 L/min).
• The temperature setting, along with the supply
temperature of the water will determine the flow
rate output of the water heater.
• Please refer to the temperature vs. gallons per
minute charts on p. 54 to determine the likely flow
rates based on your local ground water temperature
and your desired outlet water temperature.
• Refer to the table to the top right for typical
household plumbing fixture flow rates to determine
what the water heater can do in a household
application.
• Based on the United States Department of Energy
method of testing water heater output, the water
heater is rated for gallons per minute (GPM) (liters
per minute (L/min)) for Natural Gas and Propane,
when raising the water temperature by 77 °F
(43 °C) (from 58 °F to 135 °F (14 °C to 57 °C)).
See the chart on the right.
Unit: GPM (L/min)
Model Flow rate
140 (T-H3M)
Indoor
3.0 (11.2)
Outdoor
Normal Operaon
Owner's Guide
41 Page
MAINTENANCE AND SERVICE
• Clean the cold-water inlet filter. (Refer to the Unit Draining and Filter Cleaning Section on this page.)
• Be sure that all openings for combustion and ventilation air are not blocked.
• The venting system should be checked annually for any leaks, corrosion, blockages or damage.
• The burner should be checked annually for dust, lint, grease or dirt.
• Keep the area around the water heater clear. Remove any combustible materials, gasoline or any
flammable vapors and liquids.
• In accordance with all local codes and common safety practices, water discharged from the pressure
relief valve can cause severe burns instantly from scalding. DO NOT touch the pressure relief valve.
• If the relief valve discharges periodically, it may be due to thermal expansion in a closed water supply
system. Contact the water supplier or local plumbing inspector on how to correct this situation.
• Visual check of burner flames (see below) through the burner window in the burner assembly located
at the middle of the water heater.
The manufacturer recommends having the water heater checked once a year or as necessary by a licensed
technician. If repairs are needed, any repairs should be done by a licensed technician.
UNIT DRAINING AND FILTER CLEANING
Turn off the electrical power supply and close the manual gas shutoff valve
and the manual water control valve before servicing.
WARNING
Sasfactory
Blueame
Unsasfactory
Flame
blowing up
Unsasfactory
Red or Yellow
ame
1. Close the manual gas shutoff valve.
2. Turn off power to the water heater and wait a couple of
seconds. Turn on again.
3. Wait 30 seconds, and then turn off power to the water
heater, yet again.
4. Close the water shutoff valve.
5. Open all hot water taps in the house. When the residual
water flow has ceased, close all hot water taps.
6. Have a bucket or pan to catch the water from the water
heaters drain plugs. Unscrew the Small drain plug first
and unscrew the Large drain plug next to drain all the
water out of the water heater.
7. Wait a few minutes to ensure all water has completely
drained from the water heater.
8. Clean the filter: Check the water filter located within the
cold inlet. With a tiny brush, clean the water filter of any
debris which may have accumulated and reinsert the filter
back into the cold water inlet.
9. Securely screw the drain plugs back into place.
Hand- tighten only.
Water valve
Gas
valve
Drain plug
(Small)
Drain plug
with Filter (Large)
Normal Operaon
Owner's Guide
42 Page
DESCALING THE UNIT
Hard water is a severe problem for the copper coils inside heat exchangers. Heat exchanger failure due
to scale buildup from hard water conditions is NOT covered by warranty. It is highly suggested that a
scale inhibitor be installed before the cold water inlet after this procedure is done.
1) TOOLS - Gather the following materials:
a. Pump: The pump should provide a minimum of 1
gpm through the heater.
b. Descaling Solution
c. Water hoses
d. Bucket
2) SETUP -
a. Set the unit to its highest temperature setting.
b. Open multiple hot water fixtures to run
a large volume of water through the water
heater. Allow the unit to run at its full
firing rate for at least 2 minutes.
c. While the water heater is still firing, disconnect
power to the water heater.
d. Shut off all the open hot water fixtures.
3) WATERLINES – Assuming isolation valves with drain
ports are installed.
a. Isolate the water heater by closing the incoming/
outgoing water isolation valves C and D.
b. Relieve pressure within the water heater by
temporarily opening up the pressure relief valve.
c. Drain the water heater and connect hoses/pump to the
drain ports of the isolation valves: Outlet of the
pump to valve B (cold side), and another hose from valve A (hot side) to the bucket.
4) PUMP and DESCALE –
a. Fill the bucket with 5 gallons of diluted solution. Dilution ratio depends on the
cleaning/descaling solution used.
b. Place the pump into the bucket if it is submersible, or use an inlet hose into the bucket if it is
not submersible.
c. Open valves A and B.
d. Circulate descaling solution through the water heater for 45 minutes or until return water is
cleared.
5) CLEANSE THE SYSTEM – Flush the chemicals out of the heat exchanger with fresh water.
a. Close valve B.
b. Open valve D and run fresh water through the water heater and drain out of Hose 2 for 15 minutes.
c. Close all valves, relieve pressure from the water heater with the pressure relief valve, and
clean the inlet water filter with fresh water.
d. Once the water heater is flushed and cleansed, replace the water filter, open C and D, and
reconnect power to the water heater.
e. Change the temperature setting back to the desired temperature.
Normal Operaon
Owner's Guide
Isolation Valve
Water
Heater
H
C
Gas Supply
Isolation
Valve
Pressure Relief
Valve
Hose 1
Pump
Inlet Hose
(may or may not be needed,
depending on type of pump.)
Hose 2
Descaling Solution
A
B
C D
43 Page
TROUBLESHOOTING
GENERAL
PROBLEM SOLUTIONS
TEMPERATURE and AMOUNT OF HOT WATER
It takes a long time to
get hot water at the
fixtures.
• The time it takes to deliver hot water from the water heater to your
fixtures depends on the length of piping between the two. The longer
the distance or the bigger the pipes, the longer it will take to get hot
water.
• If you would like to receive hot water to your fixtures quicker, you may
want to consider a hot water recirculation system. (p. 29)
The water is not hot
enough.
• Compare the flow and temperature. See the charts on p. 54.
• Check cross plumbing between cold water lines and hot water lines.
• Is the gas supply valve fully open? (p. 31)
• Is the gas line sized properly? (p. 21)
• Is the gas supply pressure sufficient? (p. 20 and 22)
• Is the set temperature set too low? (p. 37 to 39)
The water is too hot. • Is the set temperature set too high? (p. 37 to 39)
The hot water is not
available when a
fixture is opened.
• Make sure the unit has 120 VAC, 60 Hz power supply.
• If you are using the remote controller and/or temperature controller, is
the power button turned on?
• The time it takes to deliver hot water from the water heater to your
fixtures depends on the length of piping between the two. The longer
the distance or the bigger the pipes, the longer it will take to get hot
water.
• Is the gas supply valve fully open? (p. 31)
• Is the water supply valve fully open? (p. 31)
• Is the filter on cold water inlet clean? (p. 41)
• Is the hot water fixture sufficiently open to draw at least 0.5 GPM
(1.9 L/min) through the water heater? (p. 37)
• Is the unit frozen? (p. 40)
• Is there enough gas in the tank / cylinder? (For Propane model)
• Is it plumbed backwards with reverse plumbing?
The hot water turns
cold and stays cold.
• Is the flow rate enough to keep the water heater running? (p. 37)
• If there is a recirculation system installed, does the recirculation line have
enough check valves? (p. 29)
• Is the gas supply valve fully open? (p. 31)
• Is the filter on cold water inlet clean? (p. 41)
• Are the fixtures clean of debris and obstructions?
Fluctuation in hot
water temperature.
• Is the filter on cold water inlet clean? (p. 41)
• Is the gas line sized properly? (p. 21)
• Is the supply gas pressure sufficient? (p. 20 and 22)
• Check for cross connection between cold water lines and hot water lines.
Troubleshoong
Owner's Guide
44 Page
PROBLEM SOLUTIONS
WATER HEATER
Unit does not ignite
when water goes
through the unit.
• Is the power on the water heater?
• Is the gas on?
• Is the flow rate over 0.5 GPM (1.9 L/min)? (p. 37)
• Is the filter on cold water inlet clean? (p. 41)
• Check for reverse connection and cross connection. (p. 22)
• If you use the remote controller and/or temperature controller, is
the power button turned on? (p. 37 and 38)
• Check if the inlet temperature is too high.
The fan motor is
still spinning after
operation has stopped.
• This is normal. After operation has stopped, the fan motor keeps
running from 15 to 70 seconds in order to re-ignite quickly, as well
as purge all the exhaust gas out of the flue.
Abnormal sounds from
the water heater.
• Is the correct gas type of a water heater installed? (p. 6)
• Are the DIPswitch settings for your altitude set correctly? (p. 28)
• Check the flame quality. (p 41)
• Is the intake or exhaust vent blocked? (p. 10)
• Is the vent length and diameter correct? (p. 11 to 16)
• Is the manifold pressure set correctly? (p. 4)
Unit sounds abnormal
while in operation
• Contact the manufacturer at 1-877-737-2840.
Remote controller
Controller does not
display anything when
the power button is
turned on.
• Make sure the water heater is supplied with power.
• Make sure the connection to the water heater is correct. (p. 26 and
27)
NOTICE:
When the water heater has not operated for five minutes or more,
the display of the controllers turns off to conserve energy.
An ERROR code is
displayed.
• Please see p. 45 to 47.
When the remote
controller is turned
ON, STAND BY LED
is lit.
Troubleshoong
Owner's Guide
45 Page
Error code
Green LED
Error code indicator on the temperature
controller aached to a surface of the 140
Indoor (T-H3M-DV) model and the remote
controller 9009069005 (TM-RE42).
ERROR CODES
-General-
• The water heater has self-diagnostics for safety and convenience when troubleshooting.
• If there is a problem with the water heater itself, or the installation of the unit, the error code will be
displayed on the temperature controller and remote controller.
• Consult with the table on the following pages for the description of each error code.
Example: If your unit has the “321” error code (which signifies an inlet thermistor failure)
• Indicator on the controller : “321” will be displayed on the screen in its entirety.
• Green LED on the computer board: The green LED on the computer board will be
blinking two times.
Troubleshoong
Owner's Guide
46 Page
Remote
Green
LED
Malfunction
description
Diagnosis
031
One Time Incorrect DIPswitch
setting
• Check the DIPswitch settings on the PCB (Part #701).
101
Five Times Warning for the
“991” error code
• Check if the gas type of the water heater matches
the gas supplied to it.
• Check if there is any blockage in the intake air and/
or exhaust.
• If the water heater is installed as a direct-vent
system, check whether there is enough distance
between the intake air terminal and the exhaust
terminal.
• Check the altitude/elevation of area of where the
water heater is installed and match the appropriate
DIPswitches.
• Check if there is grease and/or dirt in the burner (Part
#101) and the fan motor (Part #103), especially if the
water heater has been installed in a contaminated area.
• Check if the DIPswitches match gas type of the water
heater.
• Check the manifold pressure at Max. and Min.
• Check combustion chamber tube (Part #117) to make
sure it is clear and securely installed.
111
Three Times Ignition failure • Check if the Hi-limit switch (Part #411) is properly
functioning.
• Check for connection/breakage of wires (Part #412, 707,
708, 709 710), burn marks on the computer board (Part
#701), and/or soot on the flame rod (Part #108).
• Check if there is a buzzing spark ignition sound
coming from the burner (Part #101) when water
heater prepares for combustion.
• Listen for the double “clunk” sound coming from gas
valve assembly (Part #102) when the water heater
goes into combustion.
• Check if there is leaking from heat exchanger (Part #401).
• Check that the gas is turned on.
• Check gas supply.
121
Three Times Loss of flame • Check if the Hi-limit switch (Part #411) is properly
functioning.
• Check for connection/breakage of wires (Part #412,
707, 708, 710), burn marks on the computer board
(Part #701), and/or soot on the flame rod (Part
#108).
• Check if there is leaking from heat exchanger (Part #401).
• Check gas supply.
311
Two Times Outlet thermistor
failure
• Check for connection/breakage of wires and/or
debris on thermistor (Part #407, 408, 715).
• Check the resistance.
321
Two Times Inlet thermistor
failure
341
Two Times Exhaust thermistor
failure (Indoor
model only)
Troubleshoong
Owner's Guide
-Fault Analysis of Error Codes-
If the error code is displayed on the computer board of the water heater or remote controller and/or
temperature controller, please check the following. After checking, consult with the manufacturer.
47 Page
Remote
Green
LED
Malfunction
description
Diagnosis
391
Two Times Air-fuel ratio rod
failure
• Check for connection/breakage of wires (Part #708)
and/or soot on the AFR rod (Part #108).
510
Six Times Abnormal main gas
solenoid valve
• Check for connection/breakage of wires (Part #707)
and/or burn marks on the computer board (Part #701).
• Check for signs of vent corrosion.
• Check gas valve contacts and gas valve wire harness
connections for signs of rust or corrosion.
551
Six Times Abnormal gas
solenoid valve
• Check for connection/breakage of wires (Part #707)
and/or burn marks on the computer board (Part #701).
• Check gas valve contacts and gas valve wire harness
connections for signs of rust or corrosion..
611
Four Times Fan motor fault • Check for connection/breakage of wires, dust buildup
in the fan motor (Part #103) and/or burn marks on
the computer board (Part #701).
• Check for frozen/corrosion of connectors (Part #103).
701
One Time Computer board fault • Check for connection/breakage of wires (Part #711).
711
One Time Gas solenoid valve
drive circuit failure
• Refer to the 111 and 121 error codes.
721
Six Times False flame
detection
• Check if there is leaking from heat exchanger (Part #401).
741
N/A Miscommunication
between water
heater and remote
controller
• Check the model type of the remote controller.
• Inspect the connections between the water heater
and remote controller.
• Check the power supply of the water heater.
751
N/A Miscommunication
between water heater
and temperature
controller (Indoor
model only)
• Inspect the connections between the water heater
and temperature controller.
• Check the power supply of the water heater.
941
Five Times Abnormal exhaust
temperature (Indoor
model only)
• Check to see of the exhaust temperature is higher
than 149°F (65°C).
991
Five Times Imperfect
combustion
• Check if the gas type of the water heater matches
the gas supplied to it.
• Inspect the environment around the water heater.
Determine how long the water heater has been
installed and match DIPswitches.
• Check the altitude/elevation of the area of where
the water heater is installed.
• Check if there is any blockage in the intake air and/
or exhaust.
• If the water heater is installed as a direct-vent
system, check whether there is enough distance
between the intake air terminal and the exhaust
terminal.
• Check if there is grease and/or dirt in the burner (Part
#101) and the fan motor (Part #103), especially if the
water heater has been installed in a contaminated area
• Check the DIPswitches match gas type of the water
heater.
• Check the manifold pressure at Max. and Min.
• Check combustion chamber tube (part #117) to see if it
is clear and securely installed.
Troubleshoong
Owner's Guide
48 Page
Case assembly
Temperature
remote controller
Indoor model
Outdoor model
702
704
052
052
052
006
704
005
052
004
004
001
007
003
050
002
001
714
002
Temperature controller
Indoor model
COMPONENTS DIAGRAM
Components Diagram
Owner's Guide
723
49 Page
Computer board assembly
Surge box assembly
709
710
103
708
402
707
701
711
716
402
407
408
060
713
706
for
Indoor model
for
Outdoor model
701
710
703
120
053
705
712
712
Components Diagram
Owner's Guide
50 Page
Burner assembly
101
401
116
053
117
103
105
064
054
104
115
053
053
106
107
108
708
110
061
109
111
709
112 053
114
113
707
102
053
120
709
150
057
055 062
053 711
117
055
119
151
118
051
Manifold
assembly
Burner assembly
Components Diagram
Owner's Guide
51 Page
Water Way assembly
C
D
D
C
461
452
412
153
152
417
466 064
411
058
413
450
053
415
403
052
467
463
063
455
458
462
413
451
451
413
451
414
414
451
052
409
457
460
453
408
059
454
410
416
455
458
402
459
457
404
406
456
405
052
453
407
059
416
053
417
A
B
A
B
401
154
E
E
467
463
063
455
458
455
467
463
063
455
458
A
455
455
468
B
467
463
063
455
458
455
for Indoor model
418
419 465
715
464
053
Components Diagram
Owner's Guide
Outdoor Model
Indoor Model
52 Page
PARTS LIST
Item # Description
Part #
140 model T-H3M model
001 Case assembly for Indoor model
Case assembly for Outdoor model
N/A
N/A
EK450
EK451
002 Front cover for Indoor
Front cover for Outdoor
N/A
N/A
EK452
EK453
003
004
005
006
007
Intake air port assembly
Bracket
Junction box
Power supply cord assembly
Back guard panel
320273-350
N/A
319143-510
320273-352
N/A
EK454
EK455
EK190
EK456
EK457
050
051
052
053
Screw M4×12 (W/Washer)
Screw M4×10 (W/Washer)
Screw M4×10 (Coated)
Screw M4x10
319143-025
319143-325
319143-026
319143-060
EW000
EW001
EW002
EW003
054
055
056
057
Hex head screw M4×12 (W/Washer)
Hex head screw M4x8
Pan screw M4X20
Tap tight screw M4x12 FEZN
319143-326
319143-063
N/A
319143-201
EW004
EW005
EW018
EKK31
058
059
060
Screw M3x6 SUS
Screw M4x6
Screw M3x6
319143-087
319143-328
N/A
EW00A
EW009
EK191
061
062
063
064
Pan screw M4x8
Wire clamp 60
Screw M4x10
Screw M3x6 SUS3
319143-059
319143-048
320273-497
319143-330
EW00D
EM167
EW00P
EW00B
101
102
Burner assembly
Manifold with gas valve assembly LP
Manifold with gas valve assembly NA
320273-353
320273-354
320273-356
EK458
EK459
EK460
103 Fan motor for Indoor model
Fan motor for Outdoor model
319143-443
319143-043
EK109
EKK25
104
105
106
107
Burner gasket
Fan damper for Indoor model
Fan damper for Outdoor model
Burner window
Rod holder gasket
319143-031
320273-557
319143-282
319143-033
319143-034
EKK2X
EK491
EM381
EKK2V
EKK2W
108
109
110
111
Flame rod
Igniter rod
Rod holder
Rod cap
319143-517
320273-357
319143-036
320273-358
EK193
EK461
EKK32
EK462
112
113
114
115
Burner damper Indoor
Burner damper Outdoor
Manifold gasket A
Manifold gasket B
Burner holder gasket
320273-359
320273-360
319143-044
319143-045
319143-032
EK463
EK464
EKK2Y
EKK2K
EKK0G
116
117
118
119
Pressure port
Combustion chamber tube
Gas inlet
Gas inlet ring
319143-042
319143-344
320273-362
319143-049
EKK2D
EX019
EK465
EKK2Z
120 Surge box plate N/A EK466
Parts List
Owner's Guide
53 Page
Item # Description
Part #
140 model T-H3M model
150
151
152
153
154
O-ring P18 NBR (Black)
O-ring P20 NBR (Black)
Silicon ring for Outdoor model
Exhaust port for Outdoor model
Silicon ring
319143-350
319143-057
319143-370
319143-121
319143-065
EZP18
EK042
EK442
EX13J
EKN50
401 Heat exchanger assembly for 140 Indoor and Outdoor 320273-556 EK467
402
403
404
405
406
Flow adjustment valve / Flow sensor
Condensate drain port
Water inlet
Inlet drain plug
Inlet water filter
319143-463
319143-018
319143-193
319143-197
319143-198
EK129
EKH23
EKK1U
EKK2B
EKK2C
407 Inlet thermistor 319143-214 EKK4J
408 Outlet thermistor 319143-529 EK207
409
410
Water outlet
Outlet drain plug
319143-466
319143-199
EK104
EKK2E
411 Hi-Limit switch 319143-228 EM212
412
413
Overheat-cut-off fuse
Pipe heater
319143-067
320273-364
EX02A
EK468
414 Inlet heater 320273-365 EK469
415
416
Drain tube
Inlet heater
320273-366
319143-468
EK470
EK105
417 Secondary heat exchanger for Indoor model
Secondary heat exchanger for Outdoor model
320273-553
320273-554
EK471
EK472
418
419
Secondary heat exchanger heater
Heater fixing plate
320273-367
N/A
EK473
EK474
450
451
452
Pipe heater fixing plate
Heater fixing plate 16
Fuse fixing plate
N/A
319143-125
N/A
EK475
EK031
EK476
453
454
455
456
457
O-ring P4 FKM
O-ring P6 FKM
O-ring P14 FKM
O-ring P15 FKM
O-ring P16 FKM
319143-082
319143-080
319143-100
319143-091
319143-083
EZF04
EZF06
EZF14
EZF15
EZF16
458
459
Fastener “14-22”
Fastener “16A
319143-105
319143-226
EKK24
EM192
460
461
Fastener “16-25A
Flat heater
319143-205
319143-535
EKK39
EK217
462 Cold pipe for 140 model 320273-555 EK477
463
464
Header connection
Thermistor fixing plate
320273-368
319143-106
EK478
EX13H
465
466
467
468
Exhaust thermistor gasket
Hi-limit switch for exhaust
Gasket
Inlet pipe packing
319143-111
319143-104
319143-542
320273-558
EX13L
EKH6G
EK229
EK479
Parts List
Owner's Guide
54 Page
Item # Description
Part #
140 model T-H3M model
701 Computer board 320273-369 EK480
702
703
704
Rubber grommet
Surge box
120 VAC wire for Indoor model
120 VAC wire for Outdoor model
319143-426
320273-128
319143-427
319143-546
EX148
EK280
EK146
EK143
705
706
707
120 VAC Power ON-OFF switch
Remote controller wire for Indoor model
Remote controller wire for Outdoor model
Gas valve wire
319143-141
320273-376
319143-473
320273-379
EKK4V
EK481
EK138
EK482
708
709
Flame rod wire
Igniter assembly
320273-380
320273-381
EK483
EK484
710 Freeze protection thermostat 319143-185 EKJ59
711
712
713
714
Proportional gas valve wire
Nylon clamp FC6
Computer board cover
Cable clamp for Indoor model
319143-481
N/A
319143-191
319143-500
EK112
EX004
EKK1M
EX13C
715
716
Exhaust thermistor for Indoor model
Exhaust Hi-limit switch wire
319143-131
319143-501
EKH6E
EK180
721
722
723
724
Temperature controller for Indoor model
Fixing plate
Temperature remote controller
Remote controller connection wire
320273-684
N/A
9009069005
320273-512
EK487
EK490
TM-RE42
EK489
OUTPUT TEMPERATURE CHART
Chart is based on properly sized gas line
140 (T-H3M) model
100 105 110 115 120 125 130 135 140
40
3.8 3.5 3.2 3.0 2.8 2.7 2.5 2.4 2.3
50
4.6 4.1 3.8 3.5 3.3 3.0 2.9 2.7 2.5
60
5.7 5.1 4.6 4.1 3.8 3.5 3.3 3.0 2.9
70
7.0 6.4 5.6 5.0 4.5 4.1 3.8 3.5 3.2
0.0
2.0
4.0
6.0
8.0
40
50
60
70
Output Temperature vs. GPM ( Max. 7.0 GPM ) with Various Inlet Water Temperature
Output Hot Water GPM
Set Temp. (°F)
Incoming
Temp.(°F)
Parts List
Owner's Guide
55 Page
LIMITED WARRANTY
Application Type Heat Exchanger Parts Labor
(1)
Single Family Domestic Hot Water 15
(2)(3)
5 1Commercial or Multi-Family Domestic Hot Water 10
(2)(3)
Heating 10
(3)(4)
[Unit: Year]
1. The manufacturer warrants this product against defects in materials or workmanship as described in this
document if installed within the United States or Canada. The manufacturer or its authorized Service
Representative will, at its sole discretion, repair or replace any failed or defective mechanical or electrical parts,
or components thereof, or, if the manufacturer or its authorized Service Representative cannot replace said
parts, and repair is not commercially practicable, the manufacturer or its authorized Service Representative will
refund the purchase price. The manufacturer or its authorized Service Representative may, at its sole discretion,
use new, refurbished or reconditioned parts.
2. Warranty for all models:
(1) Limited Labor Coverage
• The manufacturer will provide for reasonable labor charges associated with warranty repairs or replacements within
one (1) year from the date of purchase. The manufacturer will only pay directly to the service provider.
• Warranty service must be performed by an authorized Service Representative. A list of authorized Service
Representatives is available upon request.
• All warranty claims and warranty service must be authorized and approved by the manufacturer.
(2) Includes recirculation and storage tank applications with proper circulation pump control (e.g. aquastat and/ or timer).
- Lack of a proper pump control will reduce the heat exchanger and parts warranty to 3 years.
(3) In all applications, the total of length of operation time must be less than 3,000 hours for the 140 (T-H3M) model.
(4) Includes dual-purpose applications (combination heating and domestic).
3. General terms of limited warranty:
This limited warranty gives you specific legal rights, and you may also have other rights which vary from State to
State. The manufacturer will honor the warranty to the original retail buyer at the original location only, within
the United States or Canada, and it is not transferable.
THIS WARRANTY COVERS ONLY FAILED MECHANICAL AND ELECTRICAL PARTS DUE TO FACTORY DEFECTS
UNDER NORMAL USAGE FOR THE PRODUCT’S INTENDED PURPOSES AND WITHIN THE APPLICABLE PERIOD
SPECIFIED IN THE TABLES ABOVE. ONLY DIRECT DAMAGES SHALL BE RECOVERABLE BY A CLAIMANT UNDER
THIS LIMITED WARRANTY AND, IN NO EVENT, WHETHER AS A RESULT OF BREACH OF CONTRACT, BREACH OF
WARRANTY, TORT LIABILITY (INCLUDING NEGLIGENCE), STRICT LIABILITY, INDEMNITY OR OTHERWISE WILL
BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR INDIRECT CONSEQUENTIAL DAMAGES INCLUDING PROPERTY
DAMAGE, PERSONAL DAMAGES, LOSS OF USE, OR INCONVENIENCE. SOME STATES DO NOT ALLOW THE
EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION MAY
NOT APPLY TO YOU.
4. Limitation on Duration of Implied Warranties:
ANY IMPLIED WARRANTIES ARISING UNDER STATE LAW, INCLUDING THE IMPLIED WARRANTIES OF FITNESS
FOR A PARTICULAR PURPOSE AND MERCHANTABILITY, SHALL IN NO EVENT EXTEND PAST THE EXPIRATION OF
ANY WARRANTY PERIOD HEREUNDER. SOME STATES DO NO ALLOW LIMITATIONS ON HOW LONG AN IMPLIED
WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
5. THIS WARRANTY WILL NOT COVER THE FOLLOWING:
•  Anyproductthatisnotinstalledbyalicensedplumber,gasinstaller,orcontractor.
•  Damagesduetoaccidents,abuse,misuse,improperinstallation,misapplication,orincorrectsizing.
•  Damagesduetofires,flooding,freezing,electricalsurges,oranyActsofGod.
•  Damagesduetounauthorizedalterations,attachments,and/orrepairs.
•  Damagesduetoalackofmaintenance(e.g.waterfilter,watertreatmentsystem,ventblockage,etc.).
•  Anyproductinstalledinanimproperenvironment(e.g.corrosive,dusty,chemicallycontaminated,
excessive lint, etc.).
Warranty
Owner's Guide
88A161-3
100270521
•  Freezedamagethatoccurswithouttakingproperpreventivemeasuresasdescribedintheinstallation
manual.
•  Condensatedamageduetoimproperlyinstalledorlackofacondensatetrap(drain).
•  Anyproductnotinstalledincompliancewithallapplicablelocal&provincialcodes,ordinances,and
good trade practices.
•  Anyproductsoldtoorinstalledinareasoutsideofthefiftystates(andtheDistrictofColumbia)of
the United States of America and Canada.
•  Anyproductinstalledinapplicationsthatcausethewaterheatertoactivatemorethan300timesper
day. (This averages to an activation every 5 minutes in a 24-hour period.)
•  Anyfailuresthatarenotduetodefectsinmaterialsorworkmanship(mechanicaland/orelectricalparts).
•  Damagesduetoimproperinstallation:
• Gas:incorrectgaspipesizing,incorrectgasmetersizing,incorrectgastype,and/orgaspressures
that fall outside the products specified range.
• Water:incorrectwaterpipesizing,waterpressuresthatfalloutsidetheproductsspecifiedrange,
recirculation flow rates that fall outside the product’s specified range (air removal), and/or lack of
proper methods of air removal in a closed-loop, circulation system. (See installation manual for
details.)
• Electric:supplypowervoltagesthatfalloutsidetheproductsspecifiedrange.
•  Damagesduetowaterquality:
• Introductionofliquidsotherthanpotablewaterintotheproduct.
• Introductionofpoolwater,spawater,oranychemicallytreatedwaterintotheproduct.
• Introductionofhardwatermeasuringmorethan7grainspergallon(120ppm)forsinglefamily
domestic applications or more than 4 grains per gallon (70 ppm) for all other types of applications
into the product.
• Introductionofuntreatedorpoorlytreatedwellwaterintotheproduct.
• IntroductionofwaterwithpHlevelslessthan6.5andgreaterthan8.5intotheproduct.