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PRODUCT DESC
CTR HI( T
NTROl
TheRa
of elee
i
em~~bUJe
COOircas,
provide on/off control for e
ing, air conditioning and refrigeration. The ETC is
equipped with a liquid crystal display (LCD) that
provides a constant readout of the sensed tem-
perature, and a touch keypad that allows the user
to easily and accurately select the set point tem-
perature, differential and heating/cooling mode of
the operation. Models are available that operate
on either line voltage
(120/208/240 VAC) or I
I
NO Contact
Full-load amps
Locked rotor amps
Resistive amps
Horsepower
9.8 A
58.8A
9.8A
1/2 hp
4.9A
29.4 A
4.9A
1/2 hp
.8A
5.8 A
1/4 hp
2.9 A
17.4 A
2.9A
1/4 hp
-20°F to 140°F (-29OC to 60OC)
-40°F to 176°F (-40OC to 80OC)
o
to 95%, RH, Non-condensing
!mpEldance
1 K
EMA 1. Plastic
UL ·sted. File E94419, Guide XAPX
CSA Certified, File LR68340, Class 4813 02
compressor control, two stage heating,
/
~--ventilation control, automatic changeover, condenser fan cycling,
space and return air temperature control, water cooled condensers
I with alarm funtion.
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 coolinglheating modes.
• Two individually programmable stages for heating
and/or cooling.
• LCD readout of sensor temperature, control settings,
relay status and onboard diagnostics.
• Remote temperature sensing up to 400 feet.
• Two SPOT output relays.
• 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.
Input
No. of
0-10 V
Code Number
Voltage Stages Output
ETC-211000-000 120/240 2
No
ETC-211100-000
120/240 2
Yes
ETC-212000-000 24
2 No
ETC·2121 00-000 24 2
Yes
120 or 208/240 VAC (24 VAC optional), 50/60 Hz
-30°F to 220°F
1°F to 30°F
SPOT
Thermistor, 1.94 in. long x 0.25 in. diameter with
8 ft. cable
120/208/240 VAC : 100 milliamps
24 VAC: 2-6 VAC
OPERATION
Liquid Crystal Display (LCD)
The LCD display provides a constant readout of the sensor temperature
and indicates if either of the two output relays is energized. When the S1
annunciator is constantly illuminated during operation, the Stage 1 relay is
energized. Likewise, when the S2 annunciator is constantly illuminated
during operation, the Stage 2 relay is energized. The display is also used
in conjunction with the keypad to allow the user to adjust the setpoint
temperatures, differentials and heating/cooling modes for each stage.
Control Setup
The temperature setpoint refers to the temperature at which the normally
open (NO) contacts of the output relay will open. Determine the loads to
be controlled and the operating modes required for each stage, cooling or
heating.
• 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.
The ETC two stage control can be set up for two stages of heating, two stages
of cooling or one stage cooling plus one stage heating. Refer to Figures 1, 2
and 3 for a visual representations of different control setups.
Input Voltage
Temperature Range
Differential Range
Switch Action
Sensor
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