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WIRING
Wiring Instruction Notes
Switch Settings
Switch SW2 must be set for applications as shown:
Line Voltage (Power Stealing)
Line Voltage (Non Power Stealing)
24 VAC (Non Power Stealing)
Power Stealing
Power Stealing is an electronic design within the control that
can eliminate the need to connect a neutral line to power the
control. The control receives power from the unit it is control-
ling. Power Stealing saves time and money by often eliminat-
ing the labor to run a neutral wire to the control for power. See
compatibility chart below for certain limitations.
Power Stealing Compatibility Chart
Application
Line Voltage, replacing existing
control that has a common wire
Line Voltage, with load greater
than 2.5 amps, without Defrost
timer or other power interruption
circuit, with or without alarm
Line Voltage, with load greater
than 2.5 amps, with Defrost
timer of other power interruption
circuit, no alarm
Line Voltage with load greater
than 2.5 amps, with Defrost
timer or other power Interruption
circuit, with alarm
Line Voltage with load less than 2.5
amps
24 VAC Application
NOTE 1: During defrost or time when load circuit is broke,
display will be blank because power has been
interrupted to the control. All menu settings and
setpoint will be restored when power is returned.
* NTC – Negative Temperature Coefficient
PTC – Positive Temperature Coefficient
NOTE: Only one sensor (PTC or NTC) may be connected. Sensor must
meet specific temperature vs. resistance specifications.
SW2
PS
Non PS
Non PS
Power
Non-Power
Stealing
Stealing
Yes
Yes
Yes
Yes
See
Yes
Note 1
No
Yes
No
Yes
No
Yes
Fig. 3 Line Voltage Application
(Power Stealing)
Alarm Output
For optional connection
to customer alarm equipment
PTC*
Temperature
PTC
Sensor
GND
BIN
NTC
NTC*
Temperature
PS
SW2
Sensor
NON
PS
24 VAC
TH TR
Voltage Input
120 VAC
208/240
VAC
Hot
L1
Neutral
L2
Load
Fig. 4 Line Voltage Application
(Non-Power Stealing)
Alarm Output
For optional connection
to customer alarm equipment
PTC*
Temperature
PTC
Sensor
GND
BIN
NTC
NTC*
Temperature
PS
SW2
Sensor
NON
PS
24 VAC
TH TR
Voltage Input
120 VAC
208/240
VAC
Hot
L1
Neutral
L2
Load
Fig. 5 24 VAC Applications
(Non-Power Stealing)
Alarm Output
For optional connection
to customer alarm equipment
PTC*
Temperature
PTC
Sensor
GND
BIN
NTC
NTC*
Temperature
PS
SW2
Sensor
NON
PS
24 VAC
TH TR
NC contact
operates opposite
of load contact
Load
(See "Special Note"
in "Operation Section"
for Alarm)
Binary Input
(Gold Plated
Contacts)
24 VAC (Block not used)
TH - Thermostat Hot
TR - Thermostat Return
Binary Input
(Gold Plated
Contacts)
24 VAC (Block not used)
TH - Thermostat Hot
TR - Thermostat Return
Binary Input
(Gold Plated
Contacts)
Note: Do not use Output
Relay to control Line Voltage
when using 24 VAC Power
24 VAC
TH - Thermostat Hot
TR - Thermostat Return
24 VAC
Class 2
Transformer
3
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