Basic Wiring Diagram Heat Only Thermostat

Convert from mercury switch duration.

Basic wiring diagram heat only thermostat. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac w white wire for heating enable y yellow wire for cooling enable. 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 basic heat a c system thermostat typically utilizes only 5 terminals. This additional terminal is labeled g in the thermostat.

Two 2 wire honeywell digital thermostat to replace mercury switch. It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated. Green the green wire connects to the fan. White the white wire is what connects to the auxiliary heat on your system.

Yellow the yellow wire connects to your compressor. Two wire thermostats typically have a red and a white wire. Orange this wire connects to your heat pump if you have one. 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.

A wiring diagram is a simplified traditional photographic representation of an electrical circuit. A heat only thermostat is a home thermostat which can only heat the air temperature and not cool it down. Red now there can be two separate wires for this. I show where the wires go at the thermostat the color code then down at the furnace control board and how to wire up the wires coming.

The free fix it guy 31 544 views. 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. Thermostat wiring diagrams for heat pumps heat pump thermostat wire diagrams. To wire a thermostat of this kind basic electrical skills tools and safety techniques are required.

Basic thermostat wiring for furnace and air conditioner. Always turn off the power before starting work. Basic thermostat wiring colors air conditioner systems always remember when changing a thermostat for a new thermostat to take a photo of the colors and where they go on the old thermostat or get a pencil and paper and write it down. Variety of 2 wire thermostat wiring diagram heat only.