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Discussion Starter · #1 · (Edited)
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.
 

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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.
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)

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?
 

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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??????
 

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Discussion Starter · #4 · (Edited)
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)

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?
the wires that are currenty attached are

C (blue)
O (orange)
W/E (white) not sure if a W1 or an E
W2 (brown
RC jumped to RH (red)
G (green)
Y1 (yellow)

so yes i have a C wire.

i guess im confused because the Orange wire for the condenser that should go to O, AND the backup heat W1 are the same location on the honeywell.

So W1 cant go to O if i have an O...right?

but then again on the current T-stat the W1 is also in a location marked as W/E.

so if its not a W1 and it is an E, id put it in E.

but E, AUX, and W2 are the same location on the honeywell again.
so i cant put W1/E and W2 on the same location.

https://www.dropbox.com/s/cejmwfujwewb8c0/WP_20160202_001.jpg

https://www.dropbox.com/s/hfjvtz555ij56o4/WP_20160202_002.jpg

heres the manuals for the two if it helps

http://siglercommercial.com/wp-content/uploads/2013/08/PRO1-IAQ_THERMOSTAT_CT855_INSTALL.pdf

https://customer.honeywell.com/resources/techlit/TechLitDocuments/69-0000s/69-2809EF.pdf
 

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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.
 
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Discussion Starter · #8 ·
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.
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.

http://1drv.ms/1UMtts8

http://1drv.ms/1UMtHzw Presumably a wiring diagram. it almost looks as though there shouldnt be a brown or and orange wire according to this supposed diagram. ill let you guys know what happens.
@sktn77a

i didnt have a chance to look at the heat pump unit as we had a fairly large snow storm and the snow drifted pretty high and i didnt want to dig my way over to it lol. hopefully the pictures help.
 

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Discussion Starter · #9 ·
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.
seems to be working!

had to set the t-stat to heat pump with two stage and emergency heat but it seems to be okay for now.

Unsure if i should try the AC as i dont want to damage anything with it only being 16 degrees F outside. dont know if it would or not but i might wait for a warmer day to try it.

Thank You guys so much for your help i really appreciate it!

could not have done it without you.
 

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Wait until it warms up outside before running in cooling mode. No real harm in running it in cooling mode now. But why waste the electric.
 
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