Need help verifying Nest wiring


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Old 06-23-17, 09:27 PM
A
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Need help verifying Nest wiring

We have a Trane heat pump system that I'm trying to setup with a Nest. The AC condenser unit's model number is 4TWR7048A1000CA and the electric furnace model number is TAM7A0C48H41SDA.

The original Trane thermostat was wired as shown here:

https://www.dropbox.com/s/gmghhcwixa..._3558.jpg?dl=0

Most of the wiring process seems simple, but I did have trouble figuring out where the X2 wire goes on the Nest unit. After an hour on the phone with Nest support they sent me the wiring instructions shown below, telling me to put the X2 wire into * slot on the Nest.

https://www.dropbox.com/s/hbolciyqnf...0f076.png?dl=0

I wired everything according to the instructions above but during the Nest setup process the setup guide complained that since I have a heat pump system I should get a Nest Pro to wire it for me, so I don't damage my HVAC system. The unit is functioning fine as far as I can tell... does the above wiring look good to you guys?

Thanks,
A
 
  #2  
Old 06-24-17, 01:05 AM
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Yep, it looks good to me.

The O/B terminal is going to be energized to cool. (I am confident that you already have it configured that way if it cools when you give the stat a cooling demand.)
 
 

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