topic Re: Install help with wiring in Nest Thermostats

Install help with wiring

musicmike108 — Wed, 18 Oct 2023 18:26:05 GMT

Hi have a trane thermopump for heat & ac and backup electric furnance for when really cold

here is my wiring on the old themostat

outside and inside has a different label letter (I'm guessing outside for conventional and inside letter heat pump)

not sure where old W1 / O orange wire goes to W1 or W2/Aux or O? on nest

not sure if old W1 / W2 white wire with jumper to X2 goes to nest W1 or W2/aux or *

outside and inside label letter color (I'm guessing outside for conventional and inside letter heat pump)

W1 outside label/ W2 inside label with white wire with jumper to X2

G and G green goes to nest G

Y and Y black goes to nest Y

W1 inside label/and O outside label wire orange

RC and RC red goes to nest RC

photos posted below

thanks for any help

Re: Install help with wiring

musicmike108 — Wed, 18 Oct 2023 18:25:25 GMT

Re: Install help with wiring

musicmike108 — Thu, 19 Oct 2023 13:54:17 GMT

anybody in these forums who can help?

Re: Install help with wiring

zoeuvre — Fri, 20 Oct 2023 16:14:44 GMT

Hi musicmike108,

Thanks for posting here in the Community forum and for showing interest in our Nest Thermostats. Fortunately, your thermostat wires are compatible with our Nest Learning Thermostat 3rd generation or Nest Thermostat E and should be wired to their bases as follows:

Black wire to Y or Y1
Green wire to G
Orange wire to OB or *OB
Red wire to R or RC/RH
White wire to W or W1

Take note that jumper wire is not needed for Nest Thermostat. Also, here's a guide for the installation and setup of Nest Learning Thermostat 3rd generation and Nest Thermostat E.

Let us know if you have any other questions.

Best,

Zoe

Re: Install help with wiring

musicmike108 — Sun, 22 Oct 2023 12:38:11 GMT

Hi Zoe,

thanks for the reply

but you don't think white wire that has W2 with X2 jump (inside label letter) for my electric furnace for really cold weather should not go to the W2/aux on nest instead of W1?

it says outside letter label is for my heatpump and inside letter label for furnace heat

Re: Install help with wiring

zoeuvre — Sun, 22 Oct 2023 17:51:08 GMT

Hi there,

Gotcha—thanks for confirming. I'm sorry for the confusion. Since the white wire is originally connected to the W2 wired jump to X2, you should connect the W2 wire to the W2 AUX terminal of the Nest Learning Thermostat 3rd generation instead.

Thanks,

Zoe

Re: Install help with wiring

musicmike108 — Mon, 30 Oct 2023 12:26:31 GMT

Hi ok seems to be working for those who have heatpump and backup furnace I set the O setting for lockout temp at -10C

Re: Install help with wiring

Jenelyn_O — Tue, 31 Oct 2023 16:39:42 GMT

Hi folks,

Chiming in — how's the functionality of your Nest Thermostat? Please let us know if anything comes up, as we'll be willing to assist you further.

I appreciate the help, Zoe.

Cheers,

Jenelyn