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  1. #14
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    27,291
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    Quote Originally Posted by isleofvanman View Post
    i was thinking a bad reversing valve could shoot some of the discharge straight into the suction line and raise pressures that way... high suction causing high head. i think the superheat was 17F... which didn't look too bad . in cooling mode i didn't check it too thoroughly but superheat definitely lower... like around 5F and the pressures which looked correct at 320-325 high side and 120 suction. Shouldn't the high side pressure be higher though if it's 85F water ? if the flow is really high though maybe that helps to lower the pressure a bit?
    Head pressure should be the same ° to ° air or water assuming proper CFM's and GPM's

  2. #15
    Join Date
    Mar 2018
    Location
    Florida
    Posts
    33
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    If you can reach the reversing valve just take your temps on the pipes and that will tell you if you are mixing discharge and suction.

  3. #16
    Join Date
    Sep 2007
    Location
    edmonds wa
    Posts
    4,434
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    Are flow controls on the water side installed and set correctly? Can you lower the loop temp down 5-10 deg temporary to see how the pressures look? 4-5 deg drop thru the water coil plus at 85 deg water would give you higher pressures.
    UA Local 32 retired as of Jan 2020

  4. #17
    Join Date
    Jan 2010
    Location
    Sea to Sky
    Posts
    3,673
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    Quote Originally Posted by pecmsg View Post
    I thought Climate master had a 65 or 70° max water temp? Maybe even lower.


    OP what happens if you throttle the water flow way down?
    Manual for a pretty common Climatemaster WSHP model says Min 20F to Max 90F entering water for heating.

    Sent from my SM-G965W using Tapatalk

  5. #18
    Join Date
    Jan 2010
    Location
    Sea to Sky
    Posts
    3,673
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    Quote Originally Posted by pecmsg View Post
    What would happen if you tried to run a Air to Air with those outside temps...…...You trip on high head also.

    Reduce the water flow and test it.
    X2...Listen to this OP..... as well Climatemaster manual I found said at your entering water temp, you should be seeing a delta T on your water of 9-11F if you are moving 3gpm. You only have 4-5F.



    Sent from my SM-G965W using Tapatalk

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