Results 1 to 5 of 5
  1. #1
    Join Date
    May 2012
    Location
    AUSTRALIA
    Age
    27
    Posts
    53
    Rep Power
    6

    Refrigerant reclaim



    Hi Guys

    Today i was reclaiming gas out of a domestic unit it works fine. but no need for it any more and also another condensing unit which boss said was working fine.
    In both the cases after when i reclaimed the gas and before i disconnect hoses or purging wait to see on the manifolds of any pressure rise, all of a sudden heard a bang noise out of compressor of the fridge and the condensing unit.
    and then the pressure rise on the gauges.
    I was wondering what that noise was perhaps the refrigerant trapped under the oil but not sure.

    Thanks Guys



  2. #2
    Join Date
    Aug 2010
    Location
    Southeast Penna.
    Age
    25
    Posts
    27
    Rep Power
    0

    Re: Refrigerant reclaim

    I've never heard the bang noise, but yes, refrigerant will get trapped in the oil and then explode out violently. Sometimes it doesn't happen until you try to move the unit.

    It's really annoying when you start to pull the unit out of position and it blows oil out the suction service valve, over you and the customer's shrubbery. BTDT.

  3. #3
    Join Date
    Jul 2013
    Location
    US
    Posts
    39
    Rep Power
    0

    Re: Refrigerant reclaim

    That would explain why the textbooks say you should rap on the compressor with a hammer or mallet when reclaiming prior to disposal of the unit. Interesting.

  4. #4
    Join Date
    Jul 2010
    Location
    NTH.QLD Australia
    Age
    55
    Posts
    1,755
    Rep Power
    26

    Re: Refrigerant reclaim

    While pulling gas from the low side of a cold compressor on a capillary system, there are two types of noises. One is the refrigerant "boiling" out of the compressor oil and the second.... and somewhat noticeable, is the piston moving suddenly due to the difference between pressures acting on the underside of the piston and it's position in the bore verses the discharge valve reed leakage that is trying to stop higher pressure refrigerant entering the bore.
    To the optimist, the glass is half full. To the pessimist, the glass is half empty.

  5. #5
    Join Date
    Apr 2006
    Location
    Not so sunny coast (BC Canada)
    Age
    35
    Posts
    1,646
    Rep Power
    17

    Re: Refrigerant reclaim

    when recovering cap tube systems I hit both lines, and ALL WAYS whack the comressor good with a hammer less ye be bathed in oil!

    at about 20inches I give it a good hit, then at -25 I hit it hard enough to make a dent then let it get down as deep as it will go and stay there!
    Now in Redvers Sask.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •