Nest Learning Thermostat Wiring 3rd Gen

[Subiewrx22]

Hello if you have a electric heat pump with emergency heat and a 7 wire setup I would recommend wiring it as follows then run your tests. I ran all the test and my system runs as it should. 

• Yellow to Y1 for heat/Cool
• Green to G for fan
• Orange to O/B for the heat pump (orange is the most common color but you may have black which will still go into O/B. Just make sure to change it in the nest setup).
• White to W2/Aux for Auxiliary Heat
• Blue to C for 24V power. (You might have a different color).
• Brown to * for emergency heat. (Your wire color may be different mine is brown).
• Red to Rh for power.

During the setup just make sure the the O/B wires and selected correctly as well as the emergency heat wire. Hope this helps. 

[Bradthedutch]

Hi, I have a 7 wire setup. Looking to swap to Nest, looking like I need the Learning 3rd Gen. The old tstats are installed as:

Brown to C

Red to R, jumped to Rc

White to W

Yellow to Y

Green to G

Blue to W2

Orange to Y2. 

Can you confirm how I should be placing wires in the new system? 

[Subiewrx22]

@Bradthedutch check my photo of my wire setup

[Markjosephp]

Hello folks,

I'm chiming in here to make sure everything is covered here.

Spot on! Thanks for posting and sharing how you wired your Nest Thermostat with your Heat Pump system, @Subiewrx22. Big help!

@Bradthedutch, I hope you've found the answer you're looking for. If you're still in need of assistance, feel free to let us know.

Best regards,
Mark

[Subiewrx22 · Accepted solution]

Here is my wiring setup. https://photos.app.goo.gl/JiainJqUwfccshto7