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Wirsbo Manifold Adjustments
Hi, Looking for some help. Purchased a 20-year house in MN with Wirsbo floor heat in the basement. It has 8 zones. Looking to adjust the manifold to increase heat in some rooms and decrease in others. I read that the initial setting (mid-point) is a dime above the brass collar. Is it correct that screwing the black disk on top of the manifold down all the way will open the zone up completely and conversely, screwing the black disk on the top of the manifold up all the way will close the zone completely? This seems backwards to me, plus, my threading is about 1/2 inch, so a dime does not appear to be midway. Can anyone offer me some advice. Thanks in advance!