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Did the first image show that all 3 ports on the control head were being used? It sorta looked that way, but it was difficult to make out.
I hooked mine up with Port1 Vacuum Source,,, Port 2 Door Diaphram/Outside air... Port 3 Capped.
I have not installed the WATER VALVE yet...it can be tapped into the other vacuum line easily...or if it is the 3 port, it can be added easily.
All in all the control unit functions well, although it seems the OUTSIDE AIR diaphram is sluggish.
thanks!
billg
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