topic Re: Installing Nest with 8 wire thermostat. How do I wire the Nest? in Nest Thermostats

Installing Nest with 8 wire thermostat. How do I wire the Nest?

ROBIII — Wed, 01 Dec 2021 22:12:22 GMT

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

laurentbourg — Wed, 01 Dec 2021 23:41:59 GMT

Please describe your hvac system? This looks like a heat pump setup with alternate heat, such as gas forced air.

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

ROBIII — Thu, 02 Dec 2021 16:19:57 GMT

That is correct. It is an American Standard heat pump.

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

ROBIII — Thu, 02 Dec 2021 16:20:15 GMT

With gas as well

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

Patrick_Caezza — Fri, 03 Dec 2021 04:20:57 GMT

Yes, your current thermostat is compatible with any of the Nest thermostats.

I would suggest wiring it like this.

Red - R to Rc or R

White W1 to W2/AUX or W

Yellow Y1 to Y1 or Y

Green - G to G

Orange O to OB or */OB

Blue - B to C

Black T1 - not used, tape off

Brown - T2 - not used tape off

The "or" is for the Google Nest Thermostat

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

Tatemalone — Wed, 26 Jan 2022 22:50:12 GMT

HI I saw that you seem to know what you are doing. I bought a white nest thermostat but my old one has 8 Wires. My Current Honeywell I saw your guide above but I was wondering if it is the same for my thermostat or different?

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

Gclem — Tue, 26 Apr 2022 23:53:11 GMT

With black and brown wire taped off will my heat pump still work the same way as when wired to previous thermostat?

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

Drafyn — Sat, 08 Oct 2022 15:23:30 GMT

Hey Patrick, thanks for the info you put out. I have this exact same 8 wire set up and just bought the Nest Thermostat which only has 6 wire openings. If I connect this and not use the brown or black wires, do I need to get a C-wire from Google, or does that setup you mentioned have the C-wire from that blue wire?

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

Tdiamond — Thu, 19 Jan 2023 22:00:41 GMT

This is my 8 wire set up trance heat pump and gas , fuel fuel . Will it work on just hooking up the 6 wires

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

Tdiamond — Thu, 19 Jan 2023 23:19:22 GMT

8 wire trane fuel fuel, what is the wiring diagram

Re: Installing Nest with 8 wire thermostat. How do I wire the Nest?

c411i3 — Fri, 09 Jun 2023 16:38:47 GMT

I called the nest support and they walked me through which of the 8 wires to install in the 6 nest spots. Apparently two of the wires on my Honeywell (S1 & S2) were for sensors that don't need to be used with the Nest.