6 Wire Thermostat Heat Pump Diagram. 8 wire thermostat wiring im replacing an old mercury switch thermostat with a programmable hunter off the shelf unit model 44133. 2 1 2 furnace rrc switch up ob heat only.
How to install nest thermostat. G used for independent fan control only. Print the wiring diagram off plus use highlighters to trace the signal.
In this wiring diagram you will see that and you will use only 5 wires.
At times the cables will cross. Now most thermostat s will not have all of these termination points but the chart will help you determine color code and connection points for your particular unit. The ultimate guide to creating a comfortable healthy long lasting and efficient home. See the diagram below for what each wire controls on your system.