Basic Honeywell Ct31A Wiring Diagram Honeywell CT31A - DoItYourself.Com Community Forums - Notice: a preceding installer can also have used a one of a kind set of colour wires. This can be a non problem to maintain track of if a whole new set of thermostat wires is pulled. Otherwise tag the wires earlier than casting off from the present thermostat, or pay attention to the terminals each cord is attached to. A few programmable thermostats (e.G. Honeywell prestige wiring necessities) want a minimum of 5 wires, and maybe more relying on what capabilities you need to operate (humidifier, and so forth). The additional fifth twine may be for not unusual; imparting stepped down electricity from a transformer.
When you have easy get admission to to the present thermostat wires, simply get rid of and follow the identical direction with the brand new set of wires. You can use cable ties, electric tape, or staples (securing wires and cables article). Be sure to take a completely conservative measurement on how lengthy your new set of wires have to be. You don’t need to start over, if you come up brief. Going into your furnace may sound intimidating, however when you have the basic information of wiring, and recognize a way to cast off the proper furnace panels to access the electronics, then you definitely should be first-class. The com 24v terminal can be related to the c (24 vac common) of the thermostat.
In a scenario where the authentic thermostat wires may additionally were stapled to an indoors wall stud, and no longer run via conduit, you may be higher off leaving the existing set of wires, and reducing them off at the access and exit factors of the wall. Then feed new wires with a fish tape (klein equipment). Take a look at your local domestic development shops, or local device rental, for condominium availability. A: in case you plan to improve to a brand new thermostat make certain you have got the proper number of wires available, in any other case your new thermostat received’t work (most superior honeywell thermostats require a common (c) wire to power on). If you do want extra wires, you'll want to recollect how difficult putting in new wires could be in your software, and if you want to price range for an electrician or hvac tech to put in the right wiring.