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Thanks Dave,

That's what I need. Someone at heatinghelp.com sent me a couple of PDF's on them and I got the idea. If you connect red toi blue and white, and the valve goes half way, replace the...

The Modutrol Motor is a M9165D1004.

I have a customer with a large heat recovery unit in a nursing home. There are a few Modutrol motors in the unit but there is one that operates a hot water...