Need help to wire my Nest

[Fassavi]

Hello everyone. I have a Trane XR80 with Heat Pump. Although most of the wirings I have figured it out, I’m confused because I cannot tell which ones are from the Heat Pump or Convetional on the current diagram. Also I have a X2 black wire which the Nest App doesn’t have on the Compatibility test. Any help will be very much appreciated. Pic attached. Thanks

 

[Patrick_Caezza · Accepted solution]

Give this wiring a try

White - W2 to W2

Black - X2 to * (set as Emergency heat)

Red 0 RC to Rc (jumper to R not needed)

Orange - O to OB

Yellow - Y to Y1

Green - G to G

Blue - B to C

[Ryan_G]

Hi Fassavi,

Thanks for being here at the Google Nest Community.

It's great to hear that the system is up and running. Please observe how it will behave in the next few days or weeks. You can always get back to us here and let us know if you need some help and we'll be glad to assist you. 

If you have other questions, let us know by creating a new thread as this will now be closed.

Thanks for your help, Patrick_Caezza.

Best regards,

Ryan

[Fassavi]

thanks Patrick. I have installed and tested it. All seems to be working. Couldn’t test cooling as it’s cold here in Ohio Today and the system won’t allow. I hope that if it gets too cold the aux. heating will kick off automatically when there’s not enough air outside for the heat pump to bring inside. It looks like the thermostat sensor is much more sensitive. I keep getting inside the house close to 75 while the old thermostat was always at 72. It doesn’t feel like 75. It’s comfortable. Let’s see. Tks!