Do I need a HVAC professional?

[Cyklein]

Its not clear to me how to wire this system with a Nest thermostat. When I use the ap to install it asks questions that do not align with the system I have. 

Do I need a HVAC expert to install and before I do, can I even use the nest? 

 

[CoolingWizard]

@Cyklein , Do you have a heat pump system with an air handler or a conventional air conditioning system with a furnace? 

AC Cooling Wizard

[Cyklein]

Conventional air conditioner with a furnace 

[CoolingWizard]

@Cyklein , you have a 2-sage Air Conditioner and. 2-stage gas furnace.  Here is your wiring setup:

Brown Wire to Nest C terminal; 24Vac Power Common

Red Wire to Nest Rc Terminal; 24Vac Power

Yellow Wire to Nest Y1; Stage 1 Cooling

Blue Wire to Nest Y2; Stage 2 Cooling

Green Wire to Nest G; Fan Relay

White Wire to Nest W1; Stage 1 Heat

Black Wire to Nest W2; Stage 2 Heat

The only wire in question is the orange wire that is currently on U1.  You will notice that there are two terminals labeled U1, and normally, when you program the use of those terminals, you have to have power in on one of the U1 and then when the thermostat sends power out, it sends it out on the second U1 by internally connecting U1 to U1.  Sometimes these are used to control a humidifier or a dehumidifier attached to the air supply duct. 

AC Cooling Wizard

[Cyklein]

Thanks!  so U1 to the Nest * terminal then? 

[CoolingWizard]

@Cyklein , you need to open the Furnace power panel and verify where the Orange wire is going.  We need to determine what is controlling before we attach it.  

AC Cooling Wizard

[Jenelyn_O]

Hi there,

Thanks for reaching out. I just want to check if you were able to try checking your HVAC control board to see where the orange wire connected?

I appreciate your help, @CoolingWizard.

Best,

Jenelyn

[Jenelyn_O]

Hi Cyklein,

I wanted to follow up if you still need help. Please let me know if you’re still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Thanks,

Jenelyn

[Jenelyn_O]

Hey Cyklein,

We haven't heard from you in a while so we'll be locking this thread if there is no update within 24 hours. If you need assistance or want to discuss topics, feel free to start a new thread.

Regards,

Jenelyn