Ranco ETC-111000-000 - Installation Manual

INSTALLATION DATA

ETC SINGLE STAGE ELECTRONIC

TEMPERATURE CONTROL

The Ranco® ETC is a microprocessor-based

family of electronic temperature controls,

designed to provide on/off control

for commercial heating, cooling, air

conditioning and refrigeration. The ETC

is equipped with a liquid crystal display

(LCD) that provides a constant read

out of the sensed temperature, and a

touch keypad that allows the user to

easily and accurately select the setpoint

temperature, differential and heating/

cooling mode of the operation. Models

are available that operate on either line

voltage (120/208/240V AC) or low voltage

(24V AC).

APPLICATIONS

With its wide temperature setpoint range

and selectable heating or cooling modes,

the ETC can be used for a wide variety of

applications including refrigerated display

cases, walk-in and reach-in refrigerators,

milk coolers, refrigerated warehouses,

chillers, beer and beverage coolers,

tank heating, space and return air temperature

controls and condenser fan cycling.

FEATURES

• Wide setpoint temperature range (-30°F to 220°F) and differential

adjustment (1°F to 30°F)

• Simple keypad programming of setpoint temperature, differential

and cooling/heating modes

• LCD display readout of sensor temperature, control settings,

relay status and onboard diagnostics

• LED (Light Emitting Diode) backlight to improve visibility of the display

in low light ambient applications.

• IP67 rated (water and dust resistant) thermistor-based probe to

remotely monitor temperature

• The sensor probe can be retrofitted in the field by the use of factory

installed interconnect

• Remote temperature sensing up to 400 feet

• SPDT output relay

• User-selectable Fahrenheit/Celsius scales

• Lockout switch to prevent tampering by unauthorized personnel

• Choice of line voltage and low voltage models available

• Optional 0 to 10 volt analog output available for remote temperature

indication

• Anti-short Cycle Compressor Delay for cooling applications

SPECIFICATIONS

Input Voltage

120 or 208/240V AC (24V AC optional), 50/60 Hz

Temperature Range -30°F to 220°F
Differential Range 1°F to 30°F

Switch Action

SPDT

Sensor

Thermistor, 1.94in. long x 0.25 in. diameter with

8 ft. cable, IP67 rated

Power Consumption 120/208/240V AC:

100 Milliamps

24V AC:

2 - 6 VA

1

Relay Electrical Ratings

120V 208/240V

NO Contact

Full-load Amps

16 Amps

8 Amps

Locked rotor Amps

96 Amps

48 Amps

Resistive Amps

15 Amps

8 Amps

Horsepower

1 HP

1 HP

NC Contact

Full-load Amps

5.8 Amps

2.9 Amps

Locked rotor Amps

34.8 Amps

17.4 Amps

Resistive Amps

5.8 Amps

2.9 Amps

Horsepower

1/4 HP

1/4 HP

Pilot Duty: 125 VA at 120/208/240V AC
Control Ambient Temperature

Operating

-20°F to 140°F (-29°C to 60°C)

Storage

-40°F to 176°F (-40°C to 80°C)

Ambient Humidity

0 to 95%, RH, Non-condensing

0 to 10V Output Impedance 1K

Enclosure

NEMA 1, Plastic

Agency Approvals

UL Listed, File E94419, Guide XAPX

CSA Certified, File LR68340, Class 4813 02

ETC ORDERING INFORMATION

Uni-Line

OEM

Input

No. of

0 - 10 V

Numbers

Numbers

Voltage

Stages

Output

ETC-111000-000 ETC-111020-000 120/240

1

No

ETC-111100-000

ETC-111120-000

120/240

1

Yes

ETC-112000-000 ETC-112020-000

24

1

No

ETC-112100-000

ETC-112120-000

24

1

Yes

OPERATION

Liquid Crystal Display (LCD)

The LCD display provides a constant read out 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 with the keypad to allow the user to adjust the

setpoint temperature, differential and heating/cooling modes.

Backlight

When any of the 3 mode keys are pressed, the backlight is activated

and the ETC is in control mode. Press the SET key to begin program

mode.

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.
• Anti-short Cycle Compressor Delay for cooling. After a relay

de-energizes, the ETC will prevent the relay from turning on until a

configurable time has occurred to protect compressor.
• When the heating mode is chosen, the differential is below the

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

setpoint.