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2
votes
1answer
2k views

Can I use a separate 24V transformer with an Ecobee 3 and an Aube relay?

I've purchased an Ecobee 3 Lite smart thermostat which requires 3.5 VA to operate but I'm using an Aube RC840T-240 electric heating relay with 24 V transformer which only provides 1.2 VA. Can I ...
1
vote
1answer
97 views

What terminal to use on AC for C wire / nest dual transformer install

So i purchased a nest gen 3 and proceeded to install it. This is on a dual transformer system, separate boiler and AC system. The good news was i had a unused G wire on the Heat side that I was going ...
1
vote
1answer
61 views

How to connect a new C wire

I have a 2 zone, single stage, heat only system with 2 wires running to each thermostat. I'm looking to install 2 Ecobee's; I have a second Honeywell AT72D1683 that I can install if needed and have ...
0
votes
1answer
684 views

Can I buy a 24v transformer with a dedicated common c-wire feed?

I have an oil furnace that feeds hot water to baseboard in four zones in my house and also to a hot water tank for tap water. There is a 24vac transformer with two output wires that feed power to the ...
0
votes
2answers
75 views

Do they make 24v transformers that have individual terminals for up to 4 thermostats? [closed]

I have two ecobee 3 thermostats sharing a 24v transformer. I'm about to buy two more. Do they make 24v transformers that have separate pairs of terminals for each thermostat? This is not a question (...