Hi,
I called Honeywell to find out which thermostat I need for my heatpump system. I told them the current wiring on the old thermostat and was advised to buy the RTH7500 or RTH7400.
Here is how I was told to wire it:
Old to New Y1 to Y R to R G to G O to O W1 to Aux (jumper from Aux to E) C to C
Node setting 0170 set for #7 Node setting 0190 set for #0
However, when I was reading the instruction manual, it says if my old thermostat has Y1 or W1 (I have both) then I need to stop now and call a contractor for help. So I am confused because they didn't tell me this on the phone, they told me how to do it myself. I tried to call them back and ask why, but they are closed for the weekend.
Does anyone know why I need a contractor because of the Y1 and W1 wires?
Thanks! Mona