A heat pump will have Y1 (and Y2 in the case of a 2 stage) not W1/2. Your back up heat will be W1 (and a w2 if 2 stage)yes i just purchased a new Honeywell WiFi thermostat (RTH9580WF1005) and i wanted to install it in my new apartment. The current Thermostat is pro1 T855.
however i am having a problem with the W1 / W2 Wires, as the system has a heat pump with a W1, W2 and O Wire and the only connection on the honeywell is W-O/B and W2-Aux/E
I have Pictures of the old thermostat and the new one, so hopefully this question wont be too difficult.
:vs_worry: Pic,s??????yes i just purchased a new Honeywell WiFi thermostat (RTH9580WF1005) and i wanted to install it in my new apartment. The current Thermostat is pro1 T855.
however i am having a problem with the W1 / W2 Wires, as the system has a heat pump with a W1, W2 and O Wire and the only connection on the honeywell is W-O/B and W2-Aux/E
I have Pictures of the old thermostat and the new one, so hopefully this question wont be too difficult.
the wires that are currenty attached areA heat pump will have Y1 (and Y2 in the case of a 2 stage) not W1/2. Your back up heat will be W1 (and a w2 if 2 stage)
Y1 and Y2 will connect to y1/2 on the stat and if you have backup heat it will connect to w2-aux. The orange wire from the condenser will hook to O
Do you have a C wire?
I will try that in a few min and let you know how it goes. i was able to find a sticker on the inside of the air handler and this is what i found.On new stat.
Blue wire to C.
Red wire to R.
Orange wire to W-O/B.
Yellow wire to Y.
Green wire to G.
White and brown wire to W2-aux/E.
Sometimes its difficult to gt 2 wires to make good contact in the push in connections on your new thermostat. In that case, you can cut the bare copper of the brown at the thermostat tape it off, and push it back into the wall. Then at the air handler disconnect it, and wire nut it to keep it safe from hitting any electrical connection. And then jumper what ever the white wire is connected to, to what ever terminal or wire the brown wire was attached to.
Hooked it up exactly how you said.On new stat.
Blue wire to C.
Red wire to R.
Orange wire to W-O/B.
Yellow wire to Y.
Green wire to G.
White and brown wire to W2-aux/E.
Sometimes its difficult to gt 2 wires to make good contact in the push in connections on your new thermostat. In that case, you can cut the bare copper of the brown at the thermostat tape it off, and push it back into the wall. Then at the air handler disconnect it, and wire nut it to keep it safe from hitting any electrical connection. And then jumper what ever the white wire is connected to, to what ever terminal or wire the brown wire was attached to.
