Nest Thermostat Compatibility?

[PanocideX]

Hello! I know this has red, white, and black wires. I'm not sure what is wound in that black one. Would this be compatible with a nest thermostat?

Thanks!

Edit: I pulled the wires out more and found a green and blue one. Does this change things?

 

[CoolingWizard]

That thermostat you have is more than likely connected to a ductless minisplit AC. It does not use a conventional HVAC 24VAC control system. It use a proprietary digital communicating protocol.   This system is not Nest Compatible unless it has an option to rewired to a conventional HVAC 24VAC control. 

AC Cooling Wizard 

[PanocideX]

Thanks for this info! I found a green and a blue wire in there too. Does that change anything?

[CoolingWizard]

It depends on the equipment on the other end.  Does the equipment on the other end have conventional HVAC control system. 

AC Cooling Wizard

[PanocideX]

Sorry I'm unfamiliar with this. Would this be located on the furnace / vent area? I do know the AC is on a separate circuit as required by the power company. But I don't know of any controls anywhere else. Where should I look?

[zoeuvre]

Hi PanocideX,

Thanks for reaching out to us. I see that your control panel has the non-standard labels of V+ and Vg which means that your system is proprietary. 

Proprietary systems aren’t compatible with Google Nest Thermostats. However, some proprietary systems can be rewired by a pro installer to be compatible.

Let us know if that helps.

I appreciate your help, @CoolingWizard. 

Best, 

Zoe. 

[CoolingWizard]

Some systems have both the proprietary RS 485 interface and sometimes they have a dual interface in some systems that will be the conventional HVAC control system. You unfortunately have to go to the furnace and look there and see if you see the wire connectors for R, Y, G, W, C, O. If you do see a terminal like that it also supports conventional HVAC controls.

AC Cooling Wizard

[zoeuvre]

Hi there, 

Thanks for the additional information @CoolingWizard. 

@PanocideX, I wanted to check and see if you managed to see the information that me and CoolingWizard have shared. Also, here's an article that you can read to learn more about why proprietary systems are not compatible with our Nest Thermostat, aside from the article I gave above.

Please let us know if you have any questions from here. We would be happy to assist and make sure you are good to go.

Regards,

Zoe

[PanocideX]

Hi yes this was helpful. The HVAC does have the required wires but would need to be run up to the control panel. I'm going to talk with a specialist about this to see if it's worth the cost. 

Thank you!

[Jake]

Hey PanocideX,

I wanted to check in with you. Were you able to speak with a pro? Let me know if you have any questions from here, as I would be happy to help out.

Best regards,

Jake

[Jake]

Hi PanocideX,

I wanted to check in and see if you are still in need of any help. Please let me know, as I would be happy to assist, and answer any questions you may have.

Best regards,
Jake

[PanocideX]

I have an electrician coming in a couple of weeks to do some other work, I'm going to ask them to look at it. 

[Jake]

Hey PanocideX,

I am glad to hear you will have someone come out and take a look soon. Please give an update once you have more details, as I want to ensure you are good to go from here.

Best regards,

Jake

[Markjosephp]

Hello there,

Thanks for the assist here, Jake.

@PanocideX, I'm checking back in — how's it going? Still need our help?

Regards,

Mark

[Dan_A]

Hey there PanocideX,

It's been a few days since your last reply — we're going to lock the thread within 24 hours. If you have further concerns, please feel free to create a new post.

Cheers,

Dan