W1 W2 Thermostat Wiring Diagrams. At left the thermostat wiring diagram illustrates the typical wiring. Thermostat wiring color codes thermostat black or blue wire c wire thermostat red wire r or rc wire thermostat white wire w1 or w2 wire orange wire for o and dark blue wire for b ob wire thermostat green wire g wire yellow thermostat wire y1 and y2 wire other wires bk rs1 rs2 odt1 odt2 aux no aux c aux nc.
Sometimes there is a w1 w2 etcetera for. W2 wire to w2 terminal. When youre ready to connect the wires to your new thermostat connect the g wire to the c connector block on the thermostat rc g y1.
Heat pump thermostat wiring diagram chart for diy as guide homeowners 2021 wire a w1 w2 e hvac school diagrams quality what all those letters mean on your heat pump thermostat wiring diagram heat pump thermostat wiring chart diagram quality 101 thermostat wiring for heat pump diy home improvement forum as heat.
Install the equipment interface to install the equipment interface. Use the wiring diagram you got from the compatibility checker in step 4 to connect your system wires to the nest thermostat. Refer back to the diagram often and dont get ahead of yourself. Y1 yy2 w1 w2 r c g rc g yy1 ww1 aux1 obacc acc w2 aux2 y2 c rh g wire used as c wire y to g jumper a150320 wiring diagram fan coil a150321 11 3.