Wiring compatibility heat pump with electric backup

[troxel]

Problem installing NEST thermostat not sure the model number as nothing is labeled with a model number (ser 17221J3DB1MPC9).

I ran through the compatibility checker before buying but while installing the install programs says not compatible. 

I have basic Heat Pump with 2nd stage heat strips using the following terminals on the thermostat

W1/O/B

W2 

Y1

R

C

Any suggestions?

[Patrick_Caezza]

Give this a try for wiring

Green - W2 to W

White - W1/O/B to */OB

Yellow - Y1 to Y

Red - R to R

Blue - C to C

When asked which wires are you using, select these.

W2, O/B, Y/Y1, R, and C

[troxel]

OK that is what I was thinking but not sure. I will give it a try. 

[MelbaDT]

Hey folks, 

Thanks again for your complete response, Patrick_Caezza. 

troxel, I'm glad to hear that you've got the answer you're looking for. Feel free to let us know if you have more questions in mind. 

Best, 

Melba

[MelbaDT]

Hey troxel, 

Checking back in — how's your thermostat now?

Best, 

Melba

[MelbaDT]

Hi, 

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best, 

Melba