Honeywell Rth221b Wiring Diagram 2wire. If i put both wires both are black on to the y g side. Sensi thermostat wiring diagram from 2 wire.
How wire a honeywell room thermostat wiring connection tables hook up procedures for brand heating heat pump or air conditioning thermostats. Learn how to wire basic thermostats and digital thermostats to operate heat and cooling. If a wire label does not match a terminal designation on the thermo.
The guide is not clear with 2 wire installation.
If i put both wires both are black on to the y g side. Apr 21 i purchased one of these honeywell rthb thermostats to try it out but the instructions are pretty much useless and my wires coming out of. Honeywell rth221b1039 operating manual manuals books the programmable rth221b gives you these same. Take away your old thermostat but leave.