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  1. #1
    iam a student I got a ? i am in my book looking for a answer to my thought process if you front seat the ssv to check that the ssv valve will hold a 28 vaacuum to assure your ssv is good, why doesnt the compressor windings not burn up arent you preventing the compresssor from not being cooled by the ref gas so in affect your
    choking off the compressor from being fed any ref is the 2 min allowed time given have something to do with it or do i have the whole operation misunderstood

    [Edited by 1/2full on 07-27-2005 at 08:18 PM]

  2. #2
    Join Date
    Oct 2004
    Location
    OZ Aka SW Florida
    Posts
    1,830
    Ok....Good Question, First They are Service Ports, High & Low.......You Are Runing In a Nonoxygen Envirment And At 28 " Vac.....The compresor Is free Wheeling!....Remember a Compressor Can't Push What It Can't Sux.....I Thunk myabeey!!
    Refrigeration...Finding the Wright Wrench to pound in the correct..Screw

  3. #3
    Join Date
    Jan 2004
    Location
    New Jersey
    Posts
    534

    front seat the ssv

    When the procedure you describe is done, the compressor will/should not run more than a few seconds. This is done to check the valve plate (suc&disc) also to lower the crankcase pressure in order to service the compressor. ie: add oil,clean sump strainer,service oil pump,change an operating control, etc.

  4. #4
    Join Date
    Oct 2001
    Posts
    6,966
    also if your pumping down the compressor at the SSV your not compressing any freon and with that the windings will no require the normal cooling from the suction return.
    "when in doubt...jump it out" http://www.youtube.com/watch?v=U1qEZHhJubY

  5. #5
    Join Date
    Feb 2004
    Location
    Maine
    Posts
    483
    One thing to keep in mind, under a high vacuum with power going to the comp there can be arcing between motor windings. Yes the refrigerant does cool the windings, but it also acts like a dielectric. Arcing is one of the biggest reasons compressor manufacturers don't want you running a comp in a vacuum for anything other than brief valve testing.

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