Terminal | Color | Description |
---|---|---|
C / X | Black | 24 Volt Common (Ground) |
R / V | Red | 24 Volt Transformer Power |
RC / RH | Red | 24 Volt Load for Cool / Heat |
Y / Y1 | Yellow | Switched Power for Cool |
W / W1 | White | Switched Power for Heat |
G | Green | Switched Power for Fan |
Terminal | Color | Description |
---|---|---|
Y2 | can vary | Switched Power for Cool 2nd Stage |
W2 | can vary | Switched Power for Heat 2nd Stage / Backup Heat |
E | can vary | Emergency Heat (Heat Pump) |
O / OB | Orange | Reversing valve (Heat Pump) |