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  1. #1
    Join Date
    Mar 2019
    Posts
    9
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    has anyone run across this before

    This is a refrigeration unit that I added a Oil separator to and 2 weeks later I come back and the separator was full of this white wax like substance and drier was plugged. what can it be? I performed triple evacuation on this after oil separator installation.

  2. #2
    Join Date
    Jan 2015
    Location
    Iowa
    Posts
    1,366
    Post Likes
    The wrong oil was used for the application

  3. #3
    Join Date
    Apr 2005
    Location
    Australia : Queensland
    Posts
    1,818
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    Following.
    The primary function of the design engineer is to make things difficult for the fabricator and impossible for the serviceman.

  4. #4
    Join Date
    Feb 2010
    Location
    In a machine room
    Posts
    8,086
    Post Likes
    What sort of system? Parallel rack? Single system? What kind of oil and refrigerant?
    Worry is a really gross misuse of one's imagination. -- PHM

  5. #5
    Join Date
    Mar 2015
    Location
    Medford, N.Y.
    Posts
    5,407
    Post Likes
    With all of this waxy stuff in the oil separator, how much oil is in the comp?.How did you determine what was in the oil separator in the 1st place? Did you do an Acid Test?

  6. #6
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    22,231
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    Besides the oil separator what else has been done to this Rack?

  7. #7
    Join Date
    Jan 2010
    Posts
    16,169
    Post Likes
    Why did you install a oil separator ?

  8. #8
    Join Date
    Jan 2016
    Location
    The triangle in the Keystone
    Posts
    1,172
    Post Likes
    I had a WIF do this to me a few years ago, minus the oil separator.

    CU would run for a few seconds then cutoff on the LPC. Pressure would slowly build over the next minute or so, comp would kick on and then a few seconds later the LPC would open.

    I had 30 some psi at the outlet of the evap and it never really moved. So I have pressure at the evap but nothing on the roof, must be a clog in this 7/8” suction line. I cut out the trap and blew out these white, waxy, oily slugs.

    That system design didn’t really bring very much oil back to the comp, every inch of horizontal suction line was angled back to the evap and it had gone through three or so compressors in 10 years so I suspected the system was oil logged. I figured all of that played into the wax slugs but I never really knew for sure.

  9. #9
    Join Date
    Mar 2019
    Posts
    9
    Post Likes
    Thread Starter
    single system Poe r404a

  10. #10
    Join Date
    Mar 2019
    Posts
    9
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    Thread Starter
    manufacturers recommended since there was a 200ft run

  11. #11
    Join Date
    Mar 2019
    Posts
    9
    Post Likes
    Thread Starter
    Poe and was originally poe

  12. #12
    Join Date
    Mar 2019
    Posts
    9
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    Thread Starter
    it's not a rack and nothing else was done it's a new installation 5 months old

  13. #13
    Join Date
    May 2014
    Location
    Bay Area California
    Posts
    22,617
    Post Likes
    New installation with used equipment?
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

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