Red wire to rh or rc which are usually bonded.
Carrier ac thermostat wiring.
From the unit to the thermostat i have 10 wires 2 of them being my outdoor temp and humidity sensor.
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.
The common wire sometimes referred to as the c wire is what s responsible for delivering constant power to your thermostat.
The red wire controls the main power switch for the heater and the cooler.
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.
Carrier thermostat wiring honeywell thermostat wiring it s all basically the same.
R the r terminal is the power.
Color of wire and termination.
Thermostat wiring and wire color chart thermostat wiring colors code.