T Stat Wire Diagram

If in the previous step you identified an o b or o b wire that s connecting to the o b terminal and have a separate w wire place this wire into the w2 terminal.

T stat wire diagram.

C 24 vac common you might see blue purple or brown typically used for this wire. If you have a heat pump system place it into the o b terminal. Thermostat wiring and wire color chart thermostat wiring colors code. The blue brown or black wire.

The table above provides a more complete list of honeywell thermostat wiring colors and their uses. The red wire r rc rh connects the high side of the output of the control transformer to the t stat. Furnace thermostat wiring diagram terminal letters on a thermostat and what they control the hot wire 24 volts usually red from the transformer is the main power wire to turn on or off a furnace components. Knowing what each thermostat wire does can help in wiring up a new or replacement room thermostat.

The thermostat is the control device that provides a simple user interface with the internal workings of your homes climate control system. The main trouble is dealing with those different colored wires knowing which one does what and if that wasn t enough you also have numbers and letters to deal with. Locate any unconnected wire labeled w or w1. Note that in our case we had to use the green wire for c as discussed below.

Honeywell thermostat wiring diagram 4 wire examples. For example if the red wire is connected to w on the thermostat the furnace should turn on. This article explains just what wire at a room thermostat actually controls. Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and cool while an air conditioner uses the process of refrigeration to only cool the central air conditioner will usually be paired with a gas furnace an electric furnace or some other method of heating.

Even the most seasoned people who enjoy diy may come across problems with wiring a thermostat. But here is a list of the most common wire color mappings as seen in many four wire t stat setups. Color of wire and termination. By the use of an adjustable set point the job of the thermostat is to turn on either the heating or cooling system to maintain the desired room temperature in the home and to turn off the system when the desired temperature is achieved.

It is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit. The blue brown or black wire c connects the low side of the output of the furnace transformer. Thermostat wire reference chart. R the r terminal is the power.

My paperback and e book. Thermostat wiring diagrams for heat pumps heat pump thermostat wire diagrams.