Wiring Diagram For A Honeywell Thermostat

3 wire spdt honeywell t87f thermostat wiring diagram.

Wiring diagram for a honeywell thermostat. If you have a two stage heat pump then you will also utilize terminal y2 for the second stage. But here is a list of the most common wire color mappings as seen in many four wire t stat setups. Our wiring diagrams section details a selection of key wiring diagrams focused around typical sundial s and y plans. 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. You ll probably see a thermostat jumper wire connecting the rc and rh terminals. The wiring for your honeywell thermostat depends on the functions of your heating and cooling system. Honeywell thermostat wiring diagram 4 wire examples.

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. 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 table above provides a more complete list of honeywell thermostat wiring colors and their uses. 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.