ST-2E to NMC-300 Wiring

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jacksgj
Posts: 2
Joined: Wed Oct 18, 2023 2:18 pm

ST-2E to NMC-300 Wiring

Post by jacksgj »

I am preparing for a conversion from ST-2E to NMC-300 board and I have a question about Zone 2 wiring. As shown in the attached picture, Zone 2 currently wired with 3 wires (W/Y/R). The conversion documents says if I have 4 wires connect to 4th wire to C and the G wire is not needed. I have 5 wires should I connect G to the board and thermostat or should i leave it disconnected?

I will be connecting to Sensi Touch 2 thermostat if that matters

Thanks

Greg
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Steven W.
Posts: 104
Joined: Tue Jun 25, 2019 9:13 am

Re: ST-2E to NMC-300 Wiring

Post by Steven W. »

If you have 5 wires then "Yes" I would wire up the "G" (GREEN) wire to the "G" terminals on the Zone board and the Stat.
Steven R. Weisneck
Technical Engineer
Tel: (732) 446-3110 Ext. #461
www.ewccontrols.com
sweisneck@ewccontrols.com
jacksgj
Posts: 2
Joined: Wed Oct 18, 2023 2:18 pm

Re: ST-2E to NMC-300 Wiring

Post by jacksgj »

Thanks!
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