The common wire sometimes referred to as the c wire is what s responsible for delivering constant power to your thermostat.
Carrier ac thermostat wiring.
Assuming the wires follow the standard color code you ll be making the following basic connections for a single zone heat pump.
Carrier to honeywell thermostat wiring carrier air to air heat pump model fv4bnf003000aaaa with electric backup dehumidifier and outdoor temp and humidity sensor.
Red wire to rh or rc which are usually bonded.
Color of wire and termination.
The red wire controls the main power switch for the heater and the cooler.
Carrier thermostat wiring honeywell thermostat wiring it s all basically the same.
From the unit to the thermostat i have 10 wires 2 of them being my outdoor temp and humidity sensor.
R the r terminal is the power.
Thermostat wiring and wire color chart thermostat wiring colors code.
My paperback and e book.