Quote:
Originally Posted by 1990C4S
Something is not right here... A-Neutral and B-Neutral should be 120VAC.
A-B should be 240VAC.
And C should be two plates, 240VAC between them...
Post a pic of the contactor and the breaker please.
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Yeah, that drawing is not right. Best to disregard. Greg brought up a contactor. Now there is a contacter in the system, but not on the drawing. I'm guessing the zone control is also the energizer for this contact device.
Whatever, as stated A-B has to be 240v ahead of any switching. I'd take the zone control out of circuit and troubleshoot from there. That or I don't understand what all this is.
I plead feeble.