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  1. #14
    Join Date
    Apr 2001
    Location
    MINN
    Posts
    936
    could be non condensible or mixed refrigerants???

  2. #15
    Join Date
    Nov 2010
    Location
    Missouri
    Posts
    355
    Quote Originally Posted by beb View Post
    could be non condensible or mixed refrigerants???
    I`ll second that.

  3. #16
    Join Date
    Feb 2007
    Location
    Northern NJ
    Posts
    646
    On water cooled machines, the first thing I look at when they don't harvest is the water regulating valve. Often especially in hard water areas, the valve seat will clog with minerals and not seat all the way. It is essential that water flow stop during harvest to allow heating of gas. A sure fire way of testing is to valve off water flow to condenser during harvest. If it drops valved off but doesn't when valve is open, you need a new water regulating valve.

  4. #17
    Join Date
    Feb 2012
    Location
    Savannah, NY
    Posts
    82
    Another question on this issue. If the valve is bad, is there a way I can isolate the refrigerant in the system so I can change it without evacuating the whole system?

  5. #18
    Join Date
    Jun 2012
    Location
    Tenn
    Posts
    139
    Quote Originally Posted by mwright View Post
    Another question on this issue. If the valve is bad, is there a way I can isolate the refrigerant in the system so I can change it without evacuating the whole system?

    You can change the water discharge valve without recovering the refrigerant. I feel as I should mention, however, that if you suspect that the system is overcharged, you need to ensure that you have a correct charge. Then you adjust the water discharge valve. If you ensure that you have proper charge and correct water out pressure and continue to have the unit tripping on high discharge pressure, your next step is to clean the scale off the water side of the condensor.

  6. #19
    Join Date
    Feb 2012
    Location
    Savannah, NY
    Posts
    82
    The pressure regulator is bad. Doesn't matter how you adjust it it is wide open. So I need to replace it and don't want to evacuate it.

  7. #20
    Join Date
    Jun 2012
    Location
    Tenn
    Posts
    139
    Quote Originally Posted by mwright View Post
    The pressure regulator is bad. Doesn't matter how you adjust it it is wide open. So I need to replace it and don't want to evacuate it.

    You should be able to secure the water and replace the valve.

  8. #21
    Join Date
    Feb 2012
    Location
    Savannah, NY
    Posts
    82
    I know that I can shut the water off and replace the water
    Pressure valve but what about the pressure side of it, the cap tube, that is brazed into the high side of the system? Are you saying unscrew the pressure spring(cap tube) then install the new valve without the pressure spring(cap tube) and screw the existing one to the water pressure valve?

  9. #22
    Join Date
    Jun 2012
    Location
    Tenn
    Posts
    139
    Quote Originally Posted by mwright View Post
    I know that I can shut the water off and replace the water
    Pressure valve but what about the pressure side of it, the cap tube, that is brazed into the high side of the system? Are you saying unscrew the pressure spring(cap tube) then install the new valve without the pressure spring(cap tube) and screw the existing one to the water pressure valve?
    Perhaps I missed where you mentioned why you need to open up the freon side.

  10. #23
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,151
    Have you worked on water cooled before. Does the amount of water passing through seem low normal high? Could be just dirty if the flow is high or low
    Weighed in charge is highly recommended or simply weigh it out to see
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  11. #24
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,151
    Quote Originally Posted by mwright View Post
    The pressure regulator is bad. Doesn't matter how you adjust it it is wide open. So I need to replace it and don't want to evacuate it.
    If your pressure is that high to cut out the machine it probably will do that. If the machine is off and the pressure is low will the flow stop?
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  12. #25
    Join Date
    Feb 2012
    Location
    Savannah, NY
    Posts
    82
    Yes I have. The discharge pressure is too high. There's too much water flow and no matter what I do to the valve it won't adjust. There is a ball valve on the inlet that I have valved almost off to decrease the pressure. I mean I can leave it that way but I'm not into cobbing things. Want to fix it properly.

    Sent from my Nexus 7 using Tapatalk 2

  13. #26
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,151
    High flow and high pressure go together. Not seeing where cutting the water down would help anything at this point in trying to figure whats wrong.
    “If You Can Dodge A Wrench You Can Dodge A Ball”

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