Is my Lennox compatable with Nest

[Mbpowell]

I'm  trying to confirm if my Lennox VRF system. How do I upload a photo?

[Mbpowell]

I only have 4 wires connected to the thermostat. They are labeled : 12v +, 12v-, HB, and HA.  Can't seem to load a photo. 

[maedacortez]

Hi Mbpowell,

Thanks for reaching out. I understand you need to check your system's compatibility, and I'm happy to help! To send me a picture, you can tap the camera icon at the top. If that's not possible, please answer the following questions:

• Are the wire labels you sent (12v+, 12v-, HB, and HA) the ones from your control board? If not, please tell me what's connected to the wires on your control board.
• Is your HVAC system dual or single fueled?
• Is your HVAC system gas, electric, or other?
• What is your country of residence?

I'll be waiting for your response.

Regards, 

Manuel

[Mbpowell]

Manuel,

Image is attached. This is a electric VRF Lennox system. It's is a 3 zone system with separate thermostats at each location. Country of residence is US. I am located in Texas. 

Regards,

 

Mike 

[Patrick_Caezza]

@Mbpowell 

Your system is not compatible with any of the Nest thermostats.

It uses a proprietary interface and is powered by 12vdc. All nest thermostats require a 24vac interface

[maedacortez]

Hi Mbpowell,

Thanks for the reply. I recommend contacting a local HVAC professional to check your system and determine if it's compatible with the Google Nest Thermostat.

Regards, 

Manuel