Old Honeywell Thermostat Wiring Diagram

Green the green wire connects to the fan.

Old honeywell thermostat wiring diagram. 8 through 13 wiring diagrams. C 24 vac common you might see blue purple or brown typically used for this wire. 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. In the honeywell t87f thermostat series the single pole double throw switch makes closes one set of contacts when the temperature falls to turn on the heating appliance.

White the white wire is what connects to the auxiliary heat on your system. The honeywell home trademark is used under license from honeywell international inc. 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.

Red now there can be two separate wires for this. 4 wire honeywell thermostat wiring diagram a pcb layout is the resulting design from taking a schematic once specific components and determining how they will physically be laid out upon a. At left the thermostat wiring diagram illustrates use of a honeywell t87f thermostat in a 2 wire application controlling a gas fired heating appliance. Strip the wire insulation as needed to fit the wires underneath the ter minal screws.

Orange this wire connects to your heat pump if you have one. Honeywell thermostat rthb wiring diagram. Honeywell thermostat wiring diagram wires. Honeywell wire saver modules combine the y and g wires to form a single k wire that connects to the k terminal on some honeywell thermostats.

Also see these other honeywellt87 wall thermostat wiring diagrams honeywell wall t87 f type thermostats for sketches and drawings of honeywell thermostat wiring hookups. Wiring details troubleshooting for the honeywell 5 2 day programmable thermostat rth2300b1012. These wires run directly outside and provide outdoor temperature information to the thermostat. Never attach wires to both the b and o terminals.

Use the wiring cross reference table below to match each old thermostat wire with its corresponding terminal on the ct87 wallplate or subbase. Honeywell thermostat wiring diagram 4 wire examples. Yellow the yellow wire connects to your compressor. The model number of the honeywell thermostat was not provided however here are the typical wiring assignments for a conventional heating system.

The table above provides a more complete list of honeywell thermostat wiring colors and their uses. Install the honeywell lyric thermostat like a pro.