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Nest compatibility

Kgranger
Community Member

My wires are labeled D, R, and B/C which doesn't appear to be an option with nest. Any thoughts on if this could be compatible? 

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4 REPLIES 4

CoolingWizard
Platinum Product Expert
Platinum Product Expert

@Kgranger ,

Your thermostat is communicating with your indoor air handler digitally using a proprietary signaling.  This is not compatible with a Nest Thermostat.  However, the manufacturer is these systems also ensure there are conventional control terminals on the circuit board.  If your thermostat cable has 5 or more colored conductor wires, you can switch this to a conventional control and be able to use a Nest Thermostat.  To help you best, I need the model number of the indoor unit and the outdoor unit.  

AC Cooling Wizard

NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.
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Thanks so much! It’s an American Standard hvac. The indoor unit model # is: 4TXCC007CC3HCBA and the outdoor unit is: 4A7V8036A1000BA

CoolingWizard
Platinum Product Expert
Platinum Product Expert

@Kgranger ,

You very efficient outdoor unit that has a 800 Volt DC inverter that is used to power the compressor and the condenser fan. There is no ability to convert this to use conventional control. You will have stay with the thermostat you have.  

AC Cooling Wizard

NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.
If my answer solved your problem, click Recommend this Answer below, and If it helped you, please give a Kudo.

Ok, thank you so much for your help!