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  1. #14
    Join Date
    Mar 2003
    Posts
    7,314
    Is this a commercial refrigeration or cimco rack? are the heads water cooled? often times these are mycom recips with water cooled heads. when the water passages are not cleaned as part of a pm program, the compressors run hot. The oil sperators they use have very little tolerance for high discharge superheat, and the element comes apart internally and stops doing much work. . I assume this is welded into the system, and there is no way to take it apart.
    Any way, you may actually have an issue with the seperator, and the oil is getting carried through the evap condenser and then back to the evap. trap could be just fine and clear, and appear to be working ok.

    Then again, I could be waay off base.

  2. #15
    Join Date
    Aug 2000
    Location
    Austell, Ga.
    Posts
    1,291
    Ice rink...NHL???? They uhhhhh..prefer the CIMCO units...(CIMCO is across the street from the NHL I am told)
    R-717....adding a gallon a week to an ammonia system...Not good at all....
    Is your oil seperator a Frick vertical unit???
    Does it not have sight glasses for the oil level??
    Does it have a functioning oil heater???
    Slugging a large recip with ammonia/oil like I think you have can be "Non-Habit" forming should you blow a head off...
    As a previous poster stated, after 40 years it is very possible that the mist eliminator in the seperator has left town...collapsed....squished...etc.
    Call Frick and get a new seperator before someone gets hurt.
    Ain't "None" of us as smart as "All" of us..

  3. #16
    Join Date
    Mar 2003
    Posts
    7,314
    They often use a cheaper, horizontal unit with no sight glass or anytihng, and its welded into the discharge line. The tend to come apart. We replaced all three on a three compressor rack at only five years or so.

  4. #17
    Join Date
    Aug 2000
    Location
    Austell, Ga.
    Posts
    1,291
    Quote Originally Posted by flange View Post
    They often use a cheaper, horizontal unit with no sight glass or anytihng, and its welded into the discharge line. The tend to come apart. We replaced all three on a three compressor rack at only five years or so.
    Man....That is truly sad to hear...I mean there are some 50-60 year old ammonia sytems out there with the vertical Frick seperators tyhat still do there jom
    Ain't "None" of us as smart as "All" of us..

  5. #18
    Join Date
    Mar 2003
    Posts
    7,314
    it is. they were the ones that use a mesh glued in place as demisters. nothing more than a pieces of twelve inch pipe welded with some holes in it, or at least seems that way. high discharge temps melt the glue and them puppies come apart. honestly though, the client could have spent the dough to let us clean the water passages on the heads and saved A LOT of money cutting them effers out.

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