INSTALLATION DATA ETC Single Stage Temperature Control

INSTALLATION DATA

ETC Single Stage

Temperature Control

Nema Type 4X

PRODUCT DESCRIPTION

The Ranco ETC is a microprocessor-based

electronic temperature control designed

to provide on/off control for commercial

heating, ventilating, air conditioning,

and refrigeration. The ETC is equipped

with a liquid crystal display (LCD) that

provides a constant readout of the sensed

temperature, and a touch keypad that

allows the user to easily and accurately

select the set point temperature, differential

and heating/cooling mode of operation.

The ETC NEMA Type 4X control can accept

either 120 or 208/240 VAC input power.

SPECIFICATIONS

Input Voltage

Temperature Range

Differential Range

Switch Action

Sensor

Power Consumption

120 or 208/240 VAC, 50/60 Hz

-30ºF to 220ºF

1ºF to 30ºF

SPDT

Thermistor, 1.94 in. long x 0.25

in. diameter with 25 ft. cable

120/208/240 VAC : 100 milliamps

24 VAC : 2-6 VAC

APPLICATIONS

All ETC NEMA Type 4X controls have enclosures rated watertight

for outdoor use. With its wide temperature setpoint range and

selectable heating and cooling modes, the ETC can be used

for a wide variety of applications including bulk milk coolers,

refrigerated storage, cooling towers, unit heaters, ventilation fan

cycling and trace heating. In addition, the ETC NEMA Type 4X

control is designed to meet the requirements of Article 547 of the

National Electric Code for use in agricultural buildings such as

poultry houses and livestock barns.

FEATURES

• Wide setpoint temperature range (-30ºF to 220ºF) and

differential adjustment (1ºF to 30ºF)

• Simple keypad programming of setpoint temperature,

differential and cooling/heating modes.

• LCD readout of sensor temperature, control settings, relay

status and onboard diagnostics.

• Remote temperature sensing up to 400 feet.

• SPDT output relay.

• User selectable Fahrenheit/Celsius scales.

• Lockout switch to prevent tampering by

unauthorized personnel.

• NEMA Type 4X enclosure rated watertight for

outdoor applications.

• Designed to meet Article 547 of the National Electrical Code for

use in agricultural buildings.

Relay Electrical Ratings

NO Contact

Full-load amps

Locked rotor amps

Resistive amps

Horsepower

NC Contact

Full-load amps

Locked rotor amps

Resistive amps

Horsepower

Pilot Duty: 125 VA at 120/208/240VAC

Operating

Storage

Enclosure

Agency

Approvals

-20ºF to 140ºF (-29ºC to 60ºC)

-40ºF to 176ºF (-40ºC to 80ºC)

NEMA Type 4X Outdoor, Plastic

UL Listed, File E94419, Guide XAPX

CSA Certified, File LR68340, Class 4813 02

120V 208/240V

16 A

96 A

15 A

1 hp

8 A

48 A

8 A

1 hp

5.8 A

34.8 A

5.8 A

1/4 hp

2.9 A

17.4 A

2.9 A

1/4 hp

ETC ORDERING INFORMATION

Code Number

ETC-141000-000

Input

Voltage

120/240

No. of

Stages

OPERATION

Liquid Crystal Display (LCD)

The LCD display provides a constant readout of the sensor

temperature and indicates if the output relay is energized. When

the S1 annunciator is constantly illuminated during operation, the

relay is energized. The display is also used in conjunction with

the keypad to allow the user to adjust the setpoint temperature,

differential and heating/cooling modes.

Control Setup

The temperature setpoint refers to the temperature at which

the normally open (NO) contacts of the output relay will open.

Determine the load(s) to be controlled and the operating

mode required, cooling or heating. Refer to Figure 1 for a

visual representation.

• When the cooling mode is chosen, the differential is above the

setpoint. The relay will de-energize as the temperature falls to

the setpoint.

• When the heating mode is chosen, the differential is below the

setpoint. The relay will de-energize as the temperature rises to

the setpoint.

Control Ambient Temperature

(+)

ON = ENERGIZED

OFF = DE-ENERGIZED

COOLING

MODE

OFF

SET POINT

HEATING

MODE

OFF

DIFFERENTIAL

(-)

TEMPERATURE

Setpoint and Differential Settings. Diagram

indicates relay on and off points in either the

heating or cooling modes.

Programming Steps and Display

The ETC can be programmed in four simple steps using the LCD

display and the three keys on the face of the control.

To start programming, press the SET key once to access

the Fahrenheit/Celsius mode. The display will show the

current status, either F for degrees Fahrenheit or C for

degrees Celsius. Then press either the up

or the down

arrow key to toggle between the F or C designation.

Press the SET key again to access the setpoint. The LCD

will display the current setpoint and the S1 annunciator

will be blinking on and off to indicate that the control is

in the setpoint mode. Then press either the up

key to

increase or the down

key to decrease the setpoint to

the desired temperature.

Press the SET key again to access the differential. The

LCD will display the current differential and the DIF 1

annunciator will be blinking on and off to indicate that the

control is in the differential mode. Then press either the

key to increase or the down key to decrease the

differential to the desired setting.

Press the SET key again to access the cooling or

heating mode. The LCD will display the current mode,

either C1 for cooling or H1 for heating. Then press

either the up

or down key to toggle between the C1

or H1 designation. Press the SET key once more and

programming is complete.

Figure 1:

Step

Annunciator

F or C

S1 (blinking)

DIF 1 (blinking)

C1/H1

Description

Fahrenheit or Celsius

Scale

Setpoint Temperature

Differential Temperature

Cooling or Heating

Mode

Display

NOTE: The ETC will automatically end programming if no keys

are depressed for a period of thirty seconds. Any settings that

have been input to the control will be accepted at that point.

All control settings are retained in non-volatile memory if power

to ETC is interrupted for any reason. Re-programming is not

necessary after power outages or disconnects unless different

control settings are required.

Lockout Switch

The ETC is provided with a lockout switch to prevent tampering

by unauthorized personnel. When placed in the LOCK position,

the keypad is disabled and no changes to the settings can be

made. When placed in the UNLOCK position, the keypad will

function normally.

To access the lockout switch, disconnect the power supply and

open the control. The switch is located on the inside cover about

2 inches above the bottom. (See Figure 2.) To disable the keypad,

slide the switch to the left LOCK position. To enable the keypad,

slide the switch to the right UNLOCK position. All ETC controls

are shipped with this switch in the UNLOCK position.

Step 1-

Step 2-

Step 3-

Step 4-

Figure 2: Lockout Switch

TROUBLE SHOOTING ERROR MESSAGES

Display Messages

E1-

Appears when either the up

or down key is pressed

when not in the programming mode.

To Correct: If the E1 message appears even when no

keys are being pressed, replace the control.

E2- Appears if the control settings are not properly stored in

memory.

To Correct: Check all settings and correct if necessary.

EP- Appears when the probe is open, shorted or sensing a

temperature that is out of range.

To Correct: Check to see if the sensed temperature is out

of range. If not, check for probe damage by comparing

it to a known ambient temperature between -30ºF and

220ºF. Replace the probe if necessary.

EE- Appears if the EEPROM data has been corrupted.

To Correct: This condition cannot be eld repaired.

Replace the control

CL- Appears if calibration mode has been entered.

To Correct: Remove power to the control for at least ve

seconds. Reapply power. If the CL message still appears,

replace the control.

LOCKOUT: LOCK UNLOCK

TEMP IND &

REG EQUIP 52N8

USE COPPER

CONDUCTORS ONLY

VAC

LRA

FLA

RES A

120

96/34.8

16/5.8

15/5.8

208/240

48/17.4

8/2.9

RELAY RATINGS N.O./N.C.

PILOT DUTY 125VA

DISPLAY CODES

FAHRENHEIT

CELSIUS

HEAT STAGE 1

COOL STAGE 1

PROBE FAILURE/

OUT OF RANGE

EEPROM FAILURE

IMPROPER KEY

MEMORY ERROR

LOCK UNLOCK

INSTALLATION INSTRUCTIONS

IMPORTANT

CONTROL MOUNTING

Mount the ETC to a wall or any at surface using a combination

of any two or more of the slots located on the back case anges.

The control’s components are not position sensitive, but should

be mounted so that they can be easily wired and adjusted.

Avoid excessive conditions of moisture, dirt, dust and corrosive

atmosphere during installation.

The ETC NEMA Type 4X control has provisions for a 1/2 inch

conduit connection. The conduit hub should be secured to the

conduit before securing the hub to the plastic housing of the

control. Caution should be exercised not the damage the control

circuit board or wiring when installing a conduit connector.

Installation of ETC NEMA Type 4X controls must conform to

requirements of the National Electrical Code and Canadian

Standards Association. Conduit ttings must be listed by

Underwriters Laboratories and Canadian Standards Association

as “Liquid-Tight” when installed to the manufacturer’s

specications.

CAUTION

To prevent possible electrical shock or equipment damage,

disconnect electrical power to the unit before and during

installation. DO NOT restore electrical power to the unit until

the control is properly installed and the cover is assembled.

DO NOT locate the control in an explosive atmosphere as a

safety hazard can result due to possible spark generation in

the control. Use the control in such environments may result in

injury or damage to the persons or property (or both) and are

likely to shorten control life;

Invensys Controls assumes no responsibility for any

such use.

CONTROL WIRING

General

• All wiring should conform to the National Electric Code and

local regulations.

• The total electrical load must not exceed the maximum

rating of the control (see Specications).

• Use copper conductors only.

• Electrical leads should not be taut; allow slack for temperature

change and vibration.

Input and Output Wiring

For typical wiring diagrams, refer to Figures 4 and 5.

All connections are made to the power (lower) circuit board.

Sensor Wiring

The temperature sensor leads are soldered to the circuit board

so no additional connections are necessary. However, watertight

splicing is required when extending the sensor cable length

beyond the standard 25 foot length supplied with the ETC. The

sensor cable can be extended up to 400 feet. A clip is included

for mounting the sensor bulb.

The ETC sensor should not be immersed directly in water or any

other uid. For immersion applications, the sensor should be

placed in a thermowell. For best results, use thermal grease in the

well to assure faster response to the sensed uid temperature.

A damaged sensor can be replaced by splicing a new Invensys

Control sensor onto the sensor leads from the circuit board. The

sensor is not polarity sensitive.

SET

Electronic

Temperature

Control

NEMA TYPE 4X

OUTDOOR ENCLOSURE

7.00

7.53 7.83

FRONT VIEW

2.00

2.70

0.99

0.88 DIA HOLE

FOR 0.50 DIA. CONDUIT

SIDE VIEW

6.52

2.48

0.13

BOTTOM VIEW

All ETC series controls are designed as operating controls

only. If an operating control failure could result in personal

injury or loss of property, a separate safety control and/or

alarm should be installed.

The schematic drawings and other information included

in these installation instructions are for the purpose of

illustration and general reference only.

These instructions do not expand, reduce, modify or alter

the Invensys Controls Terms in any way; and no warranty

or remedy in favor of the customer or any other person

arises out of these instructions.

Ranco ETC controls have been approved by Underwriter’s

Laboratories as UL Listed; however, approval does not

extend to their use for any other purpose. Invensys

Controls assumes no responsibility for any unconventional

application of its control unless such application has been

approved in writing by Invensys Controls.

It is the responsibility of the installer and the user to

assure that his or its application and use of all Invensys

Controls products are in compliance with all federal, state

and local requirements, including, without any limitation,

all requirements imposed under the National Electric Code

and any applicable building codes.

Figure 3

Figure 4: Typical 120 VAC Wiring Diagram.

Figure 5: Typical 240 VAC Wiring Diagram.

LOAD

240 VAC

STAGE

240 120 C OM

LOAD

120 VAC

STAGE

240 120 C OM

SENSOR MONITORING

For space sensing, mount the sensor where it will be unaffected

by heat/cool discharge or radiated heat sources. Spot sensing

requires the sensor to be in good contact with the surface being

sensed. The sensor can be inserted in a bulb well for immersion

sensing.

EXTENDING SENSOR

CAUTION: Sensor wiring splices may be made external from the

control. DO NOT attempt to unsolder the sensor at the control

circuit board!

CAUTION: Disconnect power to control before wiring to avoid

possible electrical shock or damage to the controller.

Additional cable can be spliced to the sensor cable to increase

the length beyond the standard 25 feet. It can be extended up to

400 feet. The cable should be at least 22 AWG or larger to keep

additional resistance to a minimum.

All splices and wire lengths added to the sensor cable should

be made according to acceptable wiring practices and should

conform to the National Electrical Code and local regulations.

Use copper conductors only. Shielded cable is not required.

Checkout Procedure

1. Before applying power, make sure installation and wiring

connections are correct.

2. Apply power to the control and observe one or more cycles

of operation.

3. If performance indicates a problem, check sensor resistance to

determine if sensor or control is at fault.

4. To check sensor resistance, disconnect sensor and measure

the resistance across the leads while measuring temperature at

the sensor.

SET

Electronic

Temperature

Control

(4) Sensors wired in series/parallel for temperature

averaging.

SENSOR

SENSOR SPECIFICATIONS

The sensor resistance decreases with temperature increase. It is

.25 x 1.94 long with 25 feet #22 AWG cable. The thermistor has a

reference resistance of 30,000 ohms at 77ºF (25ºC).

IMPORTANT

The schematic drawings and other information included in

these instructions are for the purpose of illustration and general

reference only. Invensys Controls assumes no responsibility

for any unconventional application of this control, unless such

application has been approved in writing by Invensys Controls.

Deg. C. Deg. F. RES. Nom.

-40 -40 1,010,000

-30 -22 531,000

-20 -4 291,000

-10 14 166,000

0 32 97,960

10 50 59,700

20 68 37,470

25 77 30,000

30 86 24,170

40 104 15,980

50 122 10,810

60 140 7,464

70 158 5,200

80 176 3,774

90 194 2,753

100 212 2,036

110 230 1,531

Figure 6

Figure 7: Resistance vs Temperature

SENSOR

SENSOR SENSOR

191 E. North Avenue

Carol Stream Illinois 60188 USA

Customer Service Telephone 1.800.304.6563

Customer Service Facsimile 1.800.426.0804

[email protected]

For Technical Service

Telephone 1.800.445.8299

Facsimile 1.630.260.7294

[email protected]

Invensys

and Ranco are trademarks of Invensys plc., its subsidiaries and/or

affiliated companies. All other brands mentioned may be the trademarks of

their respective owners.

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