D71
ETC COMMERCIAL TEMPERATURE CONTROLS
RANCO ETC
COMMERCIAL
TEMPERATURE
CONTROLS
The Ranco ETC is a microprocessor-based family of temperature controls
designed to provide on/off control for commercial heating, cooling, air condi-
tioning and refrigeration applications. With its wide temperature range, one
and two stage capability, selectable heating/cooling modes and multi-voltage
input, the ETC is one of the most versatile temperature controls available.
DIGITAL DISPLAY
Unlike many electronic controls, the ETC is simple to install and set up. One
finger is all you need to program it. The standard digital display and keypad
allow the user to adjust the temperature settings with 1° resolution. Setpoint
temperature, differential and mode of operation (heating or cooling) can all be
selected using the keypad and display.
When not in the programming mode, the display gives a constant readout of
the sensor temperature. Annunciators on the liquid crystal display also indi-
cate when the relay is energized.
CHOICE OF ONE OR TWO STAGE MODELS
The ETC line includes both one and two stage models. On two stage con-
trols, each stage can be set independently thus eliminating the bothersome
task of calculating interstage temperatures. And two stage models can be set
up with overlapping heating or cooling stages.
REMOTE TEMPERATURE SENSING
The ETC is capable of remote temperature sensing up to 400 feet away from
the control when using standard 22 gauge sensor wire.
BUILT-IN SAFETY
Every ETC model is equipped with diagnostic programs that check for hard-
ware, software or system problems and display different error codes to indi-
cate where the trouble is.
The ETC also has a keypad lockout switch to prevent tampering with the
control settings by unauthorized personnel. The switch, which is located
inside the enclosure, can be used to disable the keypad function.
OPTIONAL ANALOG OUTPUT
ETC models are available with a 0 to 10 volt analog output that can be used
for remote temperature indication or as input to a central monitoring system.
This signal is a linear representation of the sensor temperature with 0 volt
–30°F and 10 volts = 220°F.
ETC-111000
SPECIFICATIONS
Temperature setpoint range
–30° to 220°F
Differential range
1°F to 30°F
Input power requirements
120 or 208/240 VAC (24 VAC optional)
Sensor
Thermistor, 2" long x 1/4" dia. with 8' cable
Control Ambient Temperatures
Operating
–20°F to 140°F
Storage
–40°F to 176°F
Ambient humidity
0 to 95% RH, non-condensing
Enclosure
NEMA 1, plastic (NEMA 4X optional)
Dimensions
NEMA 1 models, 6.52" high x 2.7" wide x 2.48" deep
NEMA 4X models, 7.84" high x 2.7" wide x 2.48" deep
0 to 10 V output impedance
1 K ohms
Agency Approvals
UL listed, file E94419, Guide XAPX
CSA certified, file LR68340. class 4813 02
Switch action
SPDT
RELAY OUTPUT RATINGS - NO (NC):
ONE STAGE
TWO STAGE
120V
208/240V
120V
208/240V
Full load amps
16 (5.8) A
8 (2.9) A
9.8 (5.8) A
4.0 (2.9) A
Locked rotor amps
96 (34.8) A
48 (17.4) A
58.8 (34.8) A
29.4 (17.4) A
Resistive amps
15 (5.8) A
8 (2.9) A
9.8 (5.8) A
4.9 (2.9) A
Horsepower
1 (1/4) HP
1 (1/4) HP
1/2 (1/4) HP
1/2 (1/4) HP
Pilot duty
125VA at 120/208/240 VAC
ORDERING DATA
UNI-LINE
NUMBER
INPUT
0 TO 10 VOLT
ORDER NO.
OF STAGES
ENCLOSURE
VOLTAGE
OUTPUT
ETC-111000
NO
ETC-111100
YES
ETC-112000
NO
ETC-112100
YES
ETC-141000
NEMA 4
NO
ETC-211000
ETC-211100
YES
ETC-212000
NO
ETC-212100
YES
ETC-241000
NEMA 4
120/208/240 VAC
NO
ONE
TWO
NEMA 1
NEMA 1
120/208/240 VAC
120/208/240 VAC
24 VAC
24 VAC
NO
