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Nest Learning Thermostat - Wiring doubt W1/W2/* with Heat Pump O/B, Aux & Emergency

ChristianHd
Community Member

Replacing my Honeywell RTH8500D by a nest Learning
PXL_20210919_173137016.jpg

 

My Heat Pump is a dual system (gas) and it has 2 stage heating.

I have the expected orange O/B that will connect to the Nest O/B - No problem.

I have a white Aux and a Black E (Emergency/Manual). Should I connect the white (AUX) to Nest W2/AUX because it says the Nest Learning has W2/AUX and the Black E to the star (*) and leave W1 without any connection or, should I connect the white (AUX) to W1 and the Black (E) to W2?

Thanks

 

8 REPLIES 8

ChristianHd
Community Member

Nobody?

Jake
Community Specialist
Community Specialist

Hey ChristianHd,

 

I am sorry for the delayed reply. I wanted to reach out, and ensure you are good to go. Setting up your device can be confusing at times. I would recommend following the link here, as that should provide more details on how to set up your device.

 

If you are unsure on if your system is compatible, you can follow the link here. From there, you will be able to enter the wires you are seeing, and it will let you know if the system is compatible. You can always have a Nest Pro come out and take a closer look as well. They would be able to install the device and ensure everything is working properly. Please let me know if that helps, or if you have any questions from here.

 

Best regards,

Jake

ChristianHd
Community Member

Thanks for the answer or more exactly the non-answer. It is compatible. Let me try to ask the question slightly differently. My system is a dual fuel, the second stage or auxilliary is gas:

Heat source
Stage 1Electric
Alt. 1Gas
EmergencyElectric
 
Heat type
Stage 1Forced air
Alt. 1Forced air
EmergencyForced air
I connected the alt. heat to W2/AUX because it says AUX, should I have connected to W1 and what is the difference?
Thanks

Jake
Community Specialist
Community Specialist

Hey ChristianHd,

 

Apologies for the frustrations. I am not an electrician or an HVAC pro. I would recommend having a Nest Pro come out and take a closer look. They would be able to review your system and ensure everything is set up properly. Please let me know if you have any questions from here, as I would be happy to help out the best I can.

 

Best regards,

Jake

Jake
Community Specialist
Community Specialist

Hey ChristianHd,

 

I wanted to follow up and ensure you are good to go. Please let me know if you have any questions from here, as I will be locking the thread in 24 hours due to inactivity. 


Best regards,
Jake

ChristianHd
Community Member

Hey Jake,

I thought this forum was a place to be able to get some help and exchange technical information on specific topics, not a "Get a Pro" answer. I'm sure my problem is not unique and I had hope a more useful answer. That really means that your answer is totally useless but I would assume that it is probably the 'standard' answer when dealing with dual fuel system and you probably do what you have been told to answer which is a shame.

Anyway thanks for you time as mine was wasted using this forum

Jake
Community Specialist
Community Specialist

Hey ChristianHd,

 

I am sorry you do feel that way. As said before, I am not an electrician or an HVAC pro. Since systems and wires can be labeled different, I would not want to give out any wrong advice that would damage the system. This is why I recommend a Nest Pro come out and install the device if you are unsure how to wire it yourself. If you have any questions about the Nest Thermostat itself, please feel free to let me know as I would be happy to help. 

 

Best regards,

Jake

Jake
Community Specialist
Community Specialist

Hey ChristianHd,

 

It has been a few days since the last reply, and I am going to lock the thread at this time. If you have any questions, please feel free to create a new post. 

Best regards,
Jake