12 Brilliant Honeywell Ac Thermostat Wiring Diagram Galleries
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Honeywell Ac Thermostat Wiring Diagram - In this caricature from a 1949 honey heating manipulate handbook the thermostat has been happy (each contacts are open) and the machine isn't always calling for heat. On a drop in temperature the flexible blade makes the white contact, and finally connects the stiff blade. On a upward thrust in temperature the contacts destroy (or open) within the contrary order. [Line voltage circuits are not shown].
Going into your furnace may additionally sound intimidating, but if you have the basic knowledge of wiring, and know a way to remove the right furnace panels to get entry to the electronics, then you definitely ought to be quality. The com 24v terminal may be related to the c (24 vac commonplace) of the thermostat.
The no. 1 is a low voltage maintaining contact whilst the no. 2 is a line voltage contactor. The "coil" shown can be a magnetic coil that attracts in the armature of the no. 1 relay or it may be a relay type coil utilized in a gasoline manage valve. The keeping contact closes while the coil is energized.
Some programmable thermostats (e.G. Honeywell prestige wiring requirements) want a minimum of five wires, and perhaps more depending on what functions you want to function (humidifier, and so forth). The extra fifth wire could be for not unusual; providing stepped down strength from a transformer.
A second set of contacts will make or near on temperature upward push. This 2nd set of contacts is commonly used to perform a cooling or aircon gadget but may also be used to operate other controls or valves in some heating structures. In a scenario wherein the original thermostat wires may also have been stapled to an interior wall stud, and not run thru conduit, you may be better off leaving the prevailing set of wires, and reducing them off at the entry and go out points of the wall. Then feed new wires with a fish tape (klein tools). Test your local home improvement shops, or nearby device rental, for condo availability. Notice: a preceding installer may also have used a unique set of color wires. This could be a non trouble to maintain track of if a whole new set of thermostat wires is pulled. Otherwise tag the wires earlier than removing from the prevailing thermostat, or pay attention to the terminals each twine is connected to.