Nest thermostat with Trane XV80/XL16i


  #1  
Old 11-23-17, 09:37 PM
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Nest thermostat with Trane XV80/XL16i

I greatly appreciate the help you guys put on this forum. I tried my best to educate myself as much as possible on how to upgrade to nest without professional help, but couldn't just get it right.


Here are the details of my current system:
Old thermostat: Trane Multi-Stage Thermostat (model TH8320U1040)
Furnace: Trane XV80 (model number? 4TXCB025BC3HCAA)
Outdoor unit: Trane XL16i (model number 4TTX6024B1000AA)
And I'm looking to install a 2nd generation Nest thermostat to work with the above system.

Thanks so much in advance. I'm looking forward to learning more, and happy thanksgiving.

M
 
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Last edited by PJmax; 11-23-17 at 10:10 PM. Reason: cropped/enhanced stat base pic
  #2  
Old 11-23-17, 10:20 PM
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Welcome to the forums.

This should be the color code for your system.
Turn power off to air handler before wiring.

Y2 -------> brown ---------> Y2
W2 ------> black ----------> W2/AUX
R --------> red -------------> Rh
W1-------> white ----------> W1
Y --------> yellow ---------> Y1
G --------> green ----------> G
B --------> blue ------------> C
 

Last edited by PJmax; 11-24-17 at 09:48 PM. Reason: corrected system type
  #3  
Old 11-24-17, 05:10 AM
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Just a word of warning, the Nest is widely considered to be inferior as far as reliably and features go by those in the industry. Your old Honeywell is likely the better product. If you want WiFi, Honeywell makes some nice options.
It’s generally not a good idea to install a programmable thermostat on a heat pump, unless the thermostat has the ability to lock out the auxiliary heat
 
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Old 11-24-17, 06:07 AM
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That model number is regular a/c and not a heat pump.
So Black to W2/Aux
White to W1
 
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Old 11-24-17, 09:41 PM
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Thank you so much. That's very helpful. I'm going to try this first thing tomorrow morning, and I'll update you
 
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Old 11-24-17, 09:50 PM
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Thank you for catching my mistake Astuff.
I looked the model up and could swear I saw heatpump.
 
 

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