Wiring Diagram For A Honeywell Thermostat

Our wiring diagrams section details a selection of key wiring diagrams focused around typical sundial s and y plans.

Wiring diagram for a honeywell thermostat. The honeywell home trademark is used under license from honeywell international inc. You ll probably see a thermostat jumper wire connecting the rc and rh terminals. Furthermore this thermostat wiring diagram is specifically for a system with two transformers your system likely only has one transformer as most typical residential systems only use a single transformer for control. It s there so you can supply power to the heating and cooling switches with a single wire which is usually red.

Keep in mind that there should be a low voltage cable in the wall where the thermostat is located which has individual wires as shown in the instructions below. The wiring for your honeywell thermostat depends on the functions of your heating and cooling system. 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. C 24 vac common you might see blue purple or brown typically used for this wire.

The table above provides a more complete list of honeywell thermostat wiring colors and their uses. That is a basic honeywell thermostat wiring diagram for a single stage heat pump. The model number of the honeywell thermostat was not provided however here are the typical wiring assignments for a conventional heating system. If you have a two stage heat pump then you will also utilize terminal y2 for the second stage.