Upgrade St-2D

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markcrow
Posts: 2
Joined: Thu May 19, 2016 3:24 pm

Upgrade St-2D

Post by markcrow »

I ordered a NCM300 from you today. My ultimate goal is to put a Nest on Zone 1. I am looking for info on the swap to the NCM300. I believe I saw that it was basically a wire for wire swap abandoning the O and the B.

My current stat, (3M) is using all six wires. Down the right using W and Y on the first Zone 1 Stat terminal and all four on the next. Just a heads up on what is really needed to swap out and the wiring for Nest on Zone 1.
Paul Z.
Posts: 216
Joined: Thu Dec 08, 2011 3:05 pm

Re: Upgrade St-2D

Post by Paul Z. »

Yes you will not be using "O"or"B" with the NCM-300. The rest is wire for wire call office if having problem 1-800-446-3110X490.
markcrow
Posts: 2
Joined: Thu May 19, 2016 3:24 pm

Re: Upgrade St-2D

Post by markcrow »

Thanks Paul. My NCM-300 arrived last night. Nest today. Which wires should I use for the Nest on the new NCM-300?
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