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Posted by ken on December 08, 2005 at 13:35:18:
To make a long story short what is the difference between the too. I just recently insatalled a weil mclain gv-4 with a b&g zonetrol controller and am haveing a small issue. Want to make sure that I wired it right. Currently it is wired cold start with 2 zones/circulators/flow control valves. Any and all help is greatly appreciated.
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