Lead Wire Thermostat Connection Diagram

Just take a look at the picture below the diagram.

Lead wire thermostat connection diagram. 4 wire thermostat wiring diagram 4 wires dial thermostat wiring four wire thermostat four wire thermostat wiring diagram four wires. Thermostat wiring and wire color chart thermostat wiring colors code. The main trouble is dealing with those different colored wires knowing which one does what and if that wasnt enough you also have numbers and letters to deal with. Color of wire and termination.

Even the most seasoned people who enjoy diy may come across problems with wiring a thermostat. It is very rare to find a three wire thermostat with a c or common connection so i feel confident enough that you have a simple heat only thermostat with fan function. But here is a list of the most common wire color mappings as seen in many four wire t stat setups. The t stat connects this lead to the r wire when it calls for the cooling.

Thermostat wiring for dummies. This information is designed to help you understand the function of the thermostat to assist you when installing a new one or replacing or up grading an old one. The table above provides a more complete list of honeywell thermostat wiring colors and their uses. Y yellow wire for cooling enable g green wire controls fan on auto the diagram shows how the wiring works.

Thermostatic wiring principles by bob scaringe phd pe. The red wire or 24 vac power lead is connected straight to the rc 4 terminals. Many technicians have great difficulty understanding how to properly wire a thermostat or how to replace a thermostat with a different thermostat. Typical thermostat connections when wiring a thermostat to control only a heating system or only an air conditioning system.

Examples of how to wire a honeywell thermostat with 4 wires from the hvac unit. This wire controls the cooling first stage. C 24 vac common you might see blue purple or brown typically used for this wire. Thermostat wires with the stand you can put your thermostat on a desk shelf or other flat surface.

Honeywell thermostat wiring diagram 4 wire examples. Basic thermostat types. Continue to page 15. 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.

In this article i am going to explain the function and wiring of the most common home climate control thermostats. It doesnt matter which wire goes into which connector. Installing it on the wall. In fact the wiring of a thermostat is quite simple circuitry the confusion arises principally because.

R the r terminal is the power. Furnace control board wiring. So i got my multimeter out and touched the red lead to the blue wire and black lead to ground and got 0 vac so i was really bummed out.