Wiring 2 nest thermostasts to burnham es2


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Old 11-25-22, 08:44 PM
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Wiring 2 nest thermostasts to burnham es2

Hi, I'm trying to wire my 2 nest thermostats and having trouble where to get the common c wire from. Currently i have my 2 zones wired like this diagram
below. Ive read over some other posts with my system but only saw it with the thermostats wired to the TT. The red wires coming off my zone valves are wired to TT instead.



 
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Old 11-25-22, 09:35 PM
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Welcome to the forums.


Yes.... the red wires are tied in parallel and are used to start the boiler via the TT terminals.
Those are left as they are and will not be in this discussion.

You are only showing two wires to the thermostat.
Do you have three wires..... what are the colors ?
 
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Old 11-26-22, 02:38 PM
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I ran 18/5 running to each thermostat. Only have red and white hooked up currently.
 
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Old 11-26-22, 04:58 PM
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I asked you the colors so that I could use them in the diagram.
I chose red, white and green.
There is NO polarity at the transformer.
There is NO polarity at the yellow ZV wires.

 
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Old 11-26-22, 07:10 PM
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Yes those are the 3 colors I used. Just wired it up like you explained and works perfect! Thank you so much.
 
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Old 11-26-22, 09:01 PM
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Good job. You're welcome.
 
 

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