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  1. #14
    Join Date
    Oct 2008
    Posts
    171
    Superheat requirements vary with systems a bit. Many factors can contribute to actual super heat readings vs. system design requirements including installation quality,compressor valve condition, condition of the machine evaporator and condenser coils (Air flow issues), a split system design with long improperly insulated tubing set. The possibilities to complicate it are endless. A few things to know up front when checking superheat are:

    What refrigerant is handled by the system?
    TXV, cap tube or flow orifice design?
    Is the machine running under full load and stabilized?


    Anyway here is a link that may help or confuse the hell out of you lol.
    Best of luck!
    John

    http://www.achrnews.com/Articles/Service_and_Maintenance/eb12048703c5a010VgnVCM100000f932a8c0____
    Old, Bald and Cranky

  2. #15
    Join Date
    May 2007
    Location
    Alabama
    Posts
    909
    Quote Originally Posted by adammemin View Post
    The compressor needs that liquid to keep it cool.
    ???????????????????????????????????

  3. #16
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,748
    Quote Originally Posted by -1994 View Post
    what is the best way to check superheat on any equipment

    “If You Can Dodge A Wrench You Can Dodge A Ball”

  4. #17
    Join Date
    Aug 2007
    Location
    South central WI
    Posts
    257
    Please don't bash me too badly (I'm still learning) but part of a proper superheat reading comes from proper placement of the temp probe/clamp the sensor should be from 3/4 oclock or 8/9 oclock depending on line size... on the line the oil in the system can act as an insulator according to the little fishes swimming in the video I was forced to watch I mean I paid thousand to go to college to watch... just what I learned in school same positioning goes for proper txv placement on the horizontal.

  5. #18
    Join Date
    May 2007
    Location
    Alabama
    Posts
    909
    Quote Originally Posted by itsiceman View Post
    That works! How do ya'll find all these pics?

  6. #19
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,748
    Quote Originally Posted by BamaCool View Post
    How do ya'll find all these pics?
    Ancient Chinese Secret

    “If You Can Dodge A Wrench You Can Dodge A Ball”

  7. #20
    Join Date
    May 2007
    Location
    Alabama
    Posts
    909
    Iceman......You're good!

  8. #21
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,671
    Quote Originally Posted by btcstudenthvacr View Post
    Please don't bash me too badly (I'm still learning) but part of a proper superheat reading comes from proper placement of the temp probe/clamp the sensor should be from 3/4 oclock or 8/9 oclock depending on line size... on the line the oil in the system can act as an insulator according to the little fishes swimming in the video I was forced to watch I mean I paid thousand to go to college to watch... just what I learned in school same positioning goes for proper txv placement on the horizontal.

    I'm only gonna bash a little. The placement of the probe on the line isn't going to have a bit of difference on the temperature reading. I always thought that 3 o'clock vs 8 o'clock was a load, so I set out to prove it. Took temps of the same suction line in the same spot at varying postions around the line. No difference.

    In theory, there may be a difference, but in a real world application, just getting a probe on the line can be tough enough.

  9. #22
    Join Date
    Oct 2007
    Location
    Plainfield Il
    Posts
    43
    Quote Originally Posted by BamaCool View Post
    ???????????????????????????????????
    Yes that is correct even though the compressor is air cooled the the compressor still needs a small amount of liquid coming back to cool the windings. Someone please correct me if you feel im wrong....

  10. #23
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,748
    Quote Originally Posted by adammemin View Post
    Yes that is correct even though the compressor is air cooled the the compressor still needs a small amount of liquid coming back to cool the windings. Someone please correct me if you feel im wrong....
    Your wrong
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  11. #24
    Join Date
    Oct 2007
    Location
    Plainfield Il
    Posts
    43
    Quote Originally Posted by itsiceman View Post
    Your wrong
    Please explain.

  12. #25
    Join Date
    Aug 2007
    Location
    South central WI
    Posts
    257
    Most compressors are not capable of pumping liquid is doesn't compress it hydraulics in the pump and destroyes the pump.
    Hermetic compressors are cooled by suction gas.

  13. #26
    Join Date
    Oct 2008
    Location
    florida
    Posts
    138
    Quote Originally Posted by BamaCool View Post
    ???????????????????????????????????
    yea you know,super super heat has liquid.

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