Honeywell Thermostat Wiring Diagram

Our wiring diagrams section details a selection of key wiring diagrams focused around typical sundial s and y plans.
Honeywell thermostat wiring diagram. Use our helpful tool to take an assessment of the existing wiring in your home. That is a basic honeywell thermostat wiring diagram for a single stage heat pump. More about thermostat wiring. At left the thermostat wiring diagram illustrates use of a honeywell t87f thermostat in a 3 wire application as a spdt single pole double throw switch such as used to control low voltage motors electric radiator valves zone valves.
The honeywell home trademark is used under license from honeywell international inc. Find out if your home is compatible with a honeywell home thermostat. Furthermore this thermostat wiring diagram is specifically for a system with two transformers. Learn more about resideo s response to covid 19.
But here is a list of the most common wire color mappings as seen in many four wire t stat setups. Honeywell thermostat wiring diagram 4 wire examples the table above provides a more complete list of honeywell thermostat wiring colors and their uses. Electrical wiring for a honeywell thermostat. Prepare for mounting the new thermostat s wall plate.
Honeywell smart thermostat wiring. Again referring to the honeywell thermostat ct31a1003 wiring diagram you can see it requires only two wires r and w. It doesn t control cooling and because it s a mechanical thermostat it doesn t need power for internal functions so it has no c wire. C 24 vac common you might see blue purple or brown typically used for this wire.
Use our helpful tool to take an assessment of the existing wiring in your home. If you have a two stage heat pump then you will also utilize terminal y2 for the second stage. Make sure you have holes in the wall that line up with the holes in the new wall plate. Metal jumper for thermostat rc and rh terminals.