Honeywell Wiring Diagram - Wiring Diagram - A: in case you plan to improve to a new thermostat ensure you have got the proper wide variety of wires to be had, otherwise your new thermostat won’t paintings (maximum advanced honeywell thermostats require a common (c) cord to electricity on). In case you do need extra wires, you will want to bear in mind how difficult installing new wires will be for your software, and in case you want to price range for an electrician or hvac tech to install the proper wiring. Notice: a previous installer can also have used a exclusive set of colour wires. This can be a non trouble to maintain tune of if a whole new set of thermostat wires is pulled. Otherwise tag the wires before doing away with from the present thermostat, or be aware of the terminals every wire is hooked up to. In a situation where the unique thermostat wires may were stapled to an indoors wall stud, and no longer run via conduit, you will be better off leaving the present set of wires, and cutting them off at the entry and go out points of the wall. Then feed new wires with a fish tape (klein gear). Take a look at your nearby domestic improvement shops, or neighborhood device condominium, for condominium availability. When you have smooth access to the prevailing thermostat wires, simply dispose of and follow the equal direction with the brand new set of wires. You could use cable ties, electrical tape, or staples (securing wires and cables article). Make certain to take a totally conservative size on how lengthy your new set of wires need to be. You don’t need to start over, in case you arise short.
A few programmable thermostats (e.G. Honeywell prestige wiring necessities) need a minimal of five wires, and perhaps extra relying on what functions you want to perform (humidifier, and so on). The extra 5th cord can be for not unusual; offering stepped down strength from a transformer. Going into your furnace may also sound intimidating, but if you have the primary information of wiring, and understand the way to put off the right furnace panels to access the electronics, then you definately need to be excellent. The com 24v terminal could be connected to the c (24 vac not unusual) of the thermostat.