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3 Zone Heating System Wiring Diagram Collection

Wire A Thermostat
The diagram below shows how a basic 4-wire thermostat is connected as indicated by the color code chart above. The basic Heat + A/C System thermostat typically utilizes only 5 terminals. RC - Red Wire (Power 24 Vac) RH or 4 - Red Wire Jumpered (Power 24 Vac)
3 Central Heating Thermostat Wiring Tips | DoItYourself
Apr 16, 20102. Obtain Manufacturer’s Wiring Diagram. The number and colors of wire your system uses depends on the equipment you have installed as well as the whims of the manufacturer and installer. Air conditioners and furnaces will obviously have separate wiring, but if you have a heat pump it will require additional wires as well.
Thermostat Wiring for Dummies – How Anyone Can Do It
White – The white wire is what connects to the (auxiliary) heat on your system. Yellow – The yellow wire connects to your compressor. Green – The green wire connects to the fan. Orange – This wire connects to your heat pump (if you have one). Red – Now, there can be two separate wires for this.[PDF]
Standard AC with Standard Furnace Control Wiring
This diagram is to be used as reference for the low voltage control wiring of your heating and AC system. Always refer to your thermostat or equipment installation guides to verify proper wiring. NOTE Y2 Some AC Systems will have a blue wire with a pink stripe in place of the yellow or Y wire. **Refer to the blower chart for CFM requirements.
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