Hvac Control Wiring Diagram Thermostat. Blue this is your common or c wire. G wire connects to g terminal and for fan operation with the green wire.
Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and cool while an air conditioner uses the process of refrigeration to only. Green the green wire connects to the fan. I show the low voltage thermostat wiring diagrams for heat pumps electric strip heating furnaces air conditioners boilers and 750mv gas valves.
System wiring diagrams.
Here are the wires in 4 wire thermostats with terminal codes and color codes. Low voltage is the voltage that is used to control the unit from a thermostat or other single phase will be two power wires and a ground three phase will be the thermostat. S indoor and outdoor wired sensors y compressor stage 1 cooling y2 compressor stage 2 cooling g fan c common. Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and cool while an air conditioner uses the process of refrigeration to only.