Three-Wire Heat (C, W, Rh, G); Four-Wire Heat/Cool (C, W, Y, Rh, G) - GE IS-ZW-TSTAT-300 Installation Manual

Figure 9: Two-wire heat

Three-wire heat (C, W, RH, G):

1. Connect the R (or RH) wire to the RH terminal. This connects the power.
2. Connect the Wire to the W terminal. This connects the heat.
3. Connect the G wire to the G terminal on the thermostat. This connects the
fan.
4. 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 10: Three-wire heat

Four-wire heat/cool (C, W, Y, RH, G)

1. Connect the RH or R wire to the RH terminal. This connects the power.
2. Connect the W wire to the W terminal. This connects the heat.
3. Connect the Y wire to the Y terminal. This connects the compressor.
4. Connect the G wire to the G terminal. This connects the fan.
5. 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 electrical heat, set the Heat Type switch to ELEC.
12
C
Power
C B O W W2 Y Y2 RH RC G A
Thermostat
C
Power
C B O W W2 Y Y2 RH RC G A
Thermostat
IS-ZW-TSTAT-300 Advanced Thermostat Installation Guide
HVAC system
W R
HVAC system
W R G