Thermostats Wiring Diagrams. Q remove the factory installed jumper connecting terminals r and rc if wires are connected to both of those terminals. Refer to table 2.
How to install a. Again referring to the honeywell thermostat ct31a1003 wiring diagram you can see it requires only two wires r and w. Honeywell t3 thermostat wiring diagram.
How to install a.
White the white wire is what connects to the auxiliary heat on your system. Thats standard as well. A gas oil or electric furnace 2 or 3 wires a central air conditioner 2 or 3 wires a hot water system steam or gravit y with or without pump 2 wires a millivolt system 2 wires a central heating system with air conditioning 4. Q match the letter of your old thermostat wire with the corresponding terminal letter on your new thermostat.