| THERMOSTAT |
| ||
RC | RH | G | W | Y |
| Heat |
| Heat Relay |
|
| Transformer |
| or Valve |
|
THERMOSTAT
RC RH G W YHeat | Fan | Heat Relay |
Transformer | Relay | or Valve |
THERMOSTAT
RC RH G W Y
Cool | Fan | Cool |
Transformer | Relay | Contactor |
| THERMOSTAT |
| ||
RC | RH | G | W | Y |
| Heat |
| Heat Relay |
|
| Transformer |
| or Valve |
|
THERMOSTAT
RC RH G W YHeat | Fan | Heat Relay |
Transformer | Relay | or Valve |
THERMOSTAT
RC RH G W Y
Cool | Fan | Cool |
Transformer | Relay | Contactor |