Thermostat wire comes in various weights. Air conditioning ac contactor control board 1 this diagram is to be used as reference for the low voltage control wiring of your heating and ac system.
Thermostat wire is just a big spool of bundled color coded wires.
Ac thermostat wiring diagram. With the top thermostat wiring diagram showing an air conditioning system. The diagram below shows how a basic 4 wire thermostat is connected as indicated by the color code chart above. Variety of ac thermostat wiring diagram.
Always refer to your thermostat or equipment installation guides to verify proper wiring. R the r terminal is the power. If you have heat and ac you ll need 18 5.
How to wire an air conditioner for control 5 wires the diagram below includes the typical control wiring for a conventional central air conditioning system furthermore it includes a thermostat a condenser and an air handler with a heat source. Color of wire and termination. Red now there can be two separate wires for this.
A wiring diagram is a simplified conventional pictorial depiction of an electrical circuit. Yellow the yellow wire connects to your compressor. Orange this wire connects to your heat pump if you have one.
It reveals the elements of the circuit as streamlined forms as well as the power as well as signal links in between the gadgets. The second wiring diagram showing a heat pump system. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac.
Thermostat wiring and wire color chart thermostat wiring colors code. Moreover the heat source for a basic ac system can include heat strips for electric heat or even a hot water coil inside the. 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.
The 18 refers to the gauge and the 5 refers to how many individual wires are inside the cable. White the white wire is what connects to the auxiliary heat on your system. The basic heat a c system thermostat typically utilizes only 5 terminals.
My paperback and e book. Note some ac systems will have a blue wire with a pink stripe in place of the yellow or y wire. Finally the third thermostat diagram showing the average type of split system with an air conditioner or gas or oil furnace used for heating.
Green the green wire connects to the fan. 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 common wire sometimes referred to as the c wire is what s responsible for delivering constant power to your thermostat.