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Posted by HeatPro on December 04, 2008 at 09:28:46:
In Reply to: Re: boiler pump runs excessively with Heat Manager posted by Dave on December 03, 2008 at 18:44:33:
Yes. The 115 V powers the transformer inside so it can them close the relay. Or the incoming voltage can be wired from the incoming L1, L2 to the contacts to provide power for pumps or whatever.
There are a variety of ways to use this Universal relay.