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here one for ya

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jim lockard
jim lockard Member Posts: 1,059
in A-C, Heat Pumps & Refrigeration
The time we forgot to install the piston for the flow check coil we got the same reading. Normal head with high suction. J.Lockard

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  • don_182
    don_182 Member Posts: 69
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    Heres one for ya.

    Just got back from a call that a buddy of mine ask me to help him on.

    This system has been in place for five years now.

    Get there and find high suction pressure,low head pressure and,the compressor was screaming.Liquid line sweating.

    Subcool temp 1 degree...superheat 0 degrees, high amp draw.

    So what did I find?
  • jim lockard
    jim lockard Member Posts: 1,059
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    A place

    that no one would like to be? or an over charged A/C unit?
  • don_156
    don_156 Member Posts: 87
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    Thats was

    one part of the problem.I pulled out about five pounds of
    freon and the compressor started to reduce in noise.
    The superheat climb to about 40 with no change in subcool temps or head pressure.

    The oda was 90 degree and I had a LLT around 89 to 90 with
    still some sweating on the liquid line all the way to the
    airhandler.

    Hmmmmmmmmmmm!
  • JimmyJam
    JimmyJam Member Posts: 78
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    I know this one!

    You found a squirrel dropping lodged in the inlet to the liquid line filter/drier!

    Am I correct?

    71Gibby
  • Techman
    Techman Member Posts: 2,144
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    What is it?

    Possibly broken discharge reeds blocking the liquid line or a restricted filter drier "in" the cond unit?
  • don_182
    don_182 Member Posts: 69
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    This

    is what I found.It had a RFCIV control at the evaporator that was put in backward.

    So when the refrigerant flow the piston could not be force forward and the piston could not be pressed in the seat so
    the refrigerant would not take the path it was intended to.

    Which for me could only mean that the refrigerant could not
    be reduce in pressure and there for the boiling point could
    not be reduce.

    Anyway we put the piston in the correct way and walk away
    with a 14 degree superheat and a 7 degree subcool temp and
    no flashing in the liquid line.




  • jim lockard
    jim lockard Member Posts: 1,059
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    Awesome

    Great find Don I started to ask if you did a pump down test which would have elimated the compressor. I was thinking about a stuck piston and trying to figure how it would get stuck (with A/C the piston would never move, not like a heat pump). So for the last 5 years the piston has been backwards I did not know they would fit backwards so someone jamed it in there. Best Wishes J.Lockard
  • Techman
    Techman Member Posts: 2,144
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    Heres One

    COOL!
  • Eugene Silberstein 3
    Eugene Silberstein 3 Member Posts: 1,380
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    Excellent Catch

    Great catch, Don...

    I'm so proud of you!
  • Eugene Silberstein 3
    Eugene Silberstein 3 Member Posts: 1,380
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    Excellent Catch

    Great catch, Don...

    I'm so proud of you!
This discussion has been closed.

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