12
No: IS-0685 – Rev. 2
HEAT PUMP WIRING DIAGRAM
TWO TRANSFORMERS - (Remove Jumper Wire)
B+ A+ B- A- C B O Y Y2 G RC RH W2 W R S2 S1 T1 T2 RSB RSA
COMMUNICATION
TERMINALS
1ST COMPRESSOR
REVERSING VALVE
2ND COMPRESSOR
SUPPORT
MODULE
OR
FAN
2ND AUX HEATING
1ST AUX HEATING
OUTDOOR TEMP
SENSOR
REMOTE TEMP
SENSOR
THERMOSTAT IS
POWERED FROM
EXTERNAL 24VAC
TRANSFORMER
THERMOSTAT IS
POWERED FROM
THE HEAT PUMP
TRANSFORMER
- OR -
THERMOSTAT SECTION
NOTE: “O” is active in cooling and “B” is active in heating.
HEAT PUMP SECTION
LEGEND
CAUTION!
+
++
External 24VAC Power to Thermostat
Never place jumper
wire from RC or RH to R
when R is powered from
an external source
Jumper from RC to R when the thermostat
is powered from Heat Pump transformer
COOL
To Next Page
Loading...
