Wiring diagram for honeywell thermostat - Note: a preceding installer may additionally have used a exclusive set of shade wires. This will be a non problem to hold music of if a whole new set of thermostat wires is pulled. In any other case tag the wires before removing from the prevailing thermostat, or take note of the terminals every twine is attached to. Some programmable thermostats (e.G. Honeywell status wiring requirements) want a minimum of five wires, and perhaps greater relying on what functions you want to perform (humidifier, and so on). The additional 5th cord may be for commonplace; supplying stepped down power from a transformer.
A: if you plan to improve to a brand new thermostat make certain you've got the proper quantity of wires to be had, in any other case your new thermostat received’t work (maximum superior honeywell thermostats require a not unusual (c) wire to strength on). If you do want additional wires, you may want to don't forget how difficult putting in new wires can be in your application, and if you want to price range for an electrician or hvac tech to install the right wiring. When you have easy get right of entry to to the present thermostat wires, simply dispose of and comply with the identical direction with the new set of wires. You can use cable ties, electrical tape, or staples (securing wires and cables article). Make sure to take a completely conservative measurement on how long your new set of wires should be. You don’t want to begin over, in case you arise brief.
Going into your furnace may additionally sound intimidating, but when you have the fundamental understanding of wiring, and realize a way to cast off the proper furnace panels to get right of entry to the electronics, then you need to be satisfactory. The com 24v terminal can be connected to the c (24 vac common) of the thermostat. In a scenario in which the unique thermostat wires can also have been stapled to an indoors wall stud, and not run via conduit, you may be better off leaving the prevailing set of wires, and cutting them off at the entry and exit factors of the wall. Then feed new wires with a fish tape (klein equipment). Check your neighborhood domestic improvement shops, or neighborhood device condo, for rental availability.