Nest Learning Thermostat controlling Humidifier

[WisconsinBill]

I was told the Nest Learning Thermostat can control an all-house humidifier which is connected to my furnace.

My current GLAS (by Johnson Controls) thermostat has the following wires:

BLUE - C Terminal

RED - RC terminal

WHITE - W1 terminal

ORANGE - AUX terminal

GREEN - G terminal

YELLOW - Y1 terminal

Connecting these Wires to the Nest Learning Thermostat:

Blue, White, Red, Green, Yellow are obvious, they connect to the terminals with the same name on the Nest.

It's the Orange wire that controls my humidifier that I am unsure about.

Referring to the Nest Wiring Diagram here:    Nest-Pro-Installer-Guide.pdf

Does my Orange wire just connect to the Nest "*" (star) terminal?  

The diagram on Page 18 of the Installer Guide has me confused since I only have 1 wire to control the humidifier, not two.   No Wire connected to the RH terminal on my current thermostat.

Thanks for your help!!

Bill

[Markjosephp]

Hello WisconsinBill,

Thank you for taking the time to let us know about your inquiry. I'd be happy to take a look at this for you.

Based on your thermostat's wiring setup, the orange wire was connected to the auxiliary terminal for auxiliary heating. We can't determine specifically if it was used for your humidifier or can be used for it. We strongly suggest a professional installation when installing a humidifier or dehumidifier because incorrect setup, either due to miswiring or wrong software settings, could cause weird HVAC behavior and even damage your system. Please take a look at this article and let us know if you need more help.

Regards,

Mark

[Markjosephp]

Hey there,

I wanted to see if you still needed help. Please let us know if you have any other questions or concerns.

Thanks,

Mark

[Markjosephp]

Hi WisconsinBill,

I'm checking in to make sure that you've seen my response. Please let us know if you have any additional questions or concerns before I lock this thread in 24 hours. 

Thanks,

Mark