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  1. #1
    Join Date
    May 2010
    Location
    Northern Virginia
    Posts
    18

    Penn water valve? plugged coax coil? or both?

    I have a 5ton server room AC with glycol drycooler that has been cutting out on high head pressure; If I open the Penn valve wide open & run the drycooler pump continuously the ac works fine. When running like this the head pressure is about 150 psi (R-22). It has a tube in tube coax condenser coil which measures a TD of just 3-5 degrees between inlet & outlet water temp (is it plugged-up?). If I try adjusting the head pressure control for higher opening pressure I get no change until near the end of travel. Then my head pressure rockets up toward cut-out (375psi), the coil temperature also rockets up & it trips out before I can back it off ( faulty water valve?). So... Faulty valve? Plugged coil? Both? Any advice?
    Last edited by whoaghi; 05-15-2010 at 09:00 AM. Reason: this is commercial equipment

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