Heating And Cooling Wiring Diagrams. May 12 2020 by headcontrolsystem. A new system may need as many as ten wires like a two stage heat two stage cooling system heat pump reversing valves fan control etc if the system had two stage heating andor cooling the 2nd stage termainals would be labelled w1 and w2 for heating y1 and y2 for cooling.
See the diagram below for what each wire controls on your system. Notesome ac systems will have a blue wire with a pink stripe in place of the yellow or y wire. Now look at the detail shown in figure 10a found on page 10.
The basic heat a c system thermostat typically utilizes only 5 terminals.
Heating and cooling thermostat wiring diagram wire color code chart awesome singular heating and cooling thermostat wiring diagram chart 0d graph. With the top thermostat wiring diagram showing an air conditioning system. Heating controls wiring guide issue 17. Elegant heat pump thermostat wiring diagram diagram.