Search found 2 matches

by ProfMikeT
Thu Jul 12, 2018 12:31 pm
Forum: Craftsman's Guild
Topic: Making a Nest thermostat work with a two wire system
Replies: 14
Views: 65996

Re: Making a Nest thermostat work with a two wire system

Mick - I checked the voltage across the two wires this morning and I’m chagrined to say that it’s 28 v, so should be sufficient, correct? I’d assumed the voltage was low because I had tried to connect a Honeywell digital thermostat last year and the two wires didn’t provide the voltage that device n...
by ProfMikeT
Wed Jul 11, 2018 8:48 pm
Forum: Craftsman's Guild
Topic: Making a Nest thermostat work with a two wire system
Replies: 14
Views: 65996

Re: Making a Nest thermostat work with a two wire system

I have a Nest E thermostat that I installed in place of an old 2-wire, mercury bulb switch system, with one wire connect to W1 and the other connected to R. I have the wires from a 24 volt transformer that I would like to connect to the thermostat so that the battery is kept charged. The remaining u...