Smart thermostat

persamp · 11-22-2021, 03:21 PM

I have 2 Nests at my home in MA and 2 more at my place at the lake. In MA, they are 2 wire (heat only) installations. For one zone, I needed to use a resistor to jump between the red wire and common power input on the zone control board. The other worked fine without the resistor (different zone valves - I don't know why...they pre-date my ownership)

In NH, I needed to connect the c-wire to the air handler and T-stat - luckily, the t-stat cables each had an extra wire that I could use for the c-wire connection.

If you live in MA, you can get a great deal on Nest T-stats through Mass Save.

Both setups have been working without issue for 10+ years (MA) and 8+ years (NH)

11-22-2021, 03:21 PM	#1
persamp Junior Member Join Date: Jan 2014 Posts: 8 Thanks: 56 Thanked 3 Times in 2 Posts	Nest 2 - wire installation I have 2 Nests at my home in MA and 2 more at my place at the lake. In MA, they are 2 wire (heat only) installations. For one zone, I needed to use a resistor to jump between the red wire and common power input on the zone control board. The other worked fine without the resistor (different zone valves - I don't know why...they pre-date my ownership) In NH, I needed to connect the c-wire to the air handler and T-stat - luckily, the t-stat cables each had an extra wire that I could use for the c-wire connection. If you live in MA, you can get a great deal on Nest T-stats through Mass Save. Both setups have been working without issue for 10+ years (MA) and 8+ years (NH)

The Following 2 Users Say Thank You to persamp For This Useful Post:
DotRat (11-22-2021), trfour (11-23-2021)