Figure 14: Five-wire heat pump with AUX heat
C B O W W2 Y Y2 RH RC G A
Thermostat
Heat pump system
O
G
C
Y
R
B
or
or
W2
Power
Two-stage heat and two-stage cool (C, W2, W, Y, Y2, RH, G):
1. Connect the W wire to the W terminal. This connects the 1st stage heat.
2. Connect the W2 wire to the W2 terminal. This connects the 2nd stage heat.
3. Connect the Y wire to the Y terminal. This connects the 1st stage cool.
4. Connect the Y2 wire to the Y2 terminal. This connects the 2nd stage cool.
5. Connect the RH or R wire to the RH terminal. This connects the power.
6. Connect the G wire to the G terminal. This connects the fan.
7. Set the HVAC Type switch to NORM and:
If you have gas or oil heat, set the Heat Type switch to GAS.
If you have electric heat, set the Heat Type switch to ELEC.
Your HVAC system is now connected to the thermostat.
Figure 15: Two-stage heat and two-stage cool
C B O W W2 Y Y2 RH RC G A
Thermostat
HVAC system
G
C
Y
RH
W2
W
Y2
RC
Power
Three-wire zoned hot water (W, RH, [A]):
For solenoid valve or motor valve, connect the wires based on the diagrams
below to the correct terminal on the thermostat. Use only in Heat mode. The third
P/N 1069510 • REV A • ISS 09NOV10
15
