3 Wire Thermostat Wiring Diagram Heat Only

3 wire heat only thermostat r g w if you have a heat only system you may notice that your thermostat has three wires r g and w.

3 wire thermostat wiring diagram heat only.

Thermostat installation wiring diagrams. The thermostat instructions call for a red power wire a yellow green and white wire. Thermostat installation wiring diagrams. A heat only thermostat is a home thermostat which can only heat the air temperature and not cool it down.

In the most basic system this functionality is provided by use of a fan center relay and the low voltage wiring to the thermostat now will require a minimum of three wires for heat only units and four wires for heat cool fan for control. The rth7600 has more wires and in the wiring diagrams in the book shows no 1 2 3 and is set up with the multi wire system. At left you can see the 11 possible thermostat wire connectors on the 3m 22 filtrete thermostat. The simplest setup for a heating system is a two wire thermostat.

In this scenario the power extender kit pek is not compatible. For programmable thermostats and smart thermostats c wires are essential for setting a schedule or having your heat or air conditioner turn on at a desired temperature while some units can run without a c wire even brands like nest recommend having one for optimal. It reveals the elements of the circuit as streamlined forms and also the power and also signal connections between the devices. A wiring diagram is a simplified traditional photographic representation of an electrical circuit.

Because they only have one function they are 2 wire thermostats usually consisting of a red wire for power and a white wire for heating. In this installation only two wires r and w have been connected. There are a couple of options available to create a c wire and make the ecobee compatible. Typical thermostat wire connections for heat pumps.

Ecobee thermostats require a c common wire to power on. My thermostat wiring only has only three wires. Variety of 2 wire thermostat wiring diagram heat only. If any cooling like an air conditioner or fan control is required more wires are needed.

If the unit requires only two wires the system is only able to heat the space. Most homeowners with moderate home improvement skills can wire a heat only thermostat. Heat only 2 wire boiler furnace installations for ecobee thermostats this article applies to all ecobee thermostats except smart and ems. We have a good post on heat pump thermostat wiring on the following page.