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  1. #14
    Join Date
    Oct 2012
    Location
    Wisconsin
    Posts
    4,430
    POE oil breaking down and forming "wax", and plugging up driers and cap tubes is fairly common on small systems. As noted its usually caused by running for a long time with a dirty condenser or non-functioning condenser fan motor, which overheats the oil and turns it into wax.

    You should see what some of that cooked oil looks like, kind of dark with small chunks in it. After you drain it, you can tell why the cap tube and drier keep plugging.

    If its really bad we will pull the compressor, drain the oil, and refill the compressor with new oil. Also flush out the system as best we can with nitrogen and maybe some rx-11.

    For driers on cap tube systems, I like the Sporlan C052CAP-TT-HH

    Its amazing how much money people will spend to repair, instead of replace. Its like they have it in there head - they look at a 10 year old reach-in, and say "theres no need to buy a new one, this things only a couple years old"

    I had one small system I worked on for literally six hours. I put a new cap tube in, drained oil in compressor and refilled, then I actually took the condenser out and blew rx-11 in it and shook it, turned it upside down and drained all this black sh** out.

  2. #15
    Join Date
    Oct 2012
    Location
    Wisconsin
    Posts
    4,430
    Quote Originally Posted by timebuilder View Post
    I know of a well-known casual dining restaurant whose name is reminiscient of a 1960's Rolling Stones hit. They have a warehouse full of old, used equipment that they deliver to new stores to cut costs.

    Then, they have no maintenance.

    Then, they want you to repair the old junk, and then they complain about how much it costs.

    Penny smart, pound foolish.
    Well you can do what I always do. When you get everything up and running you can drive off in your van singing "Good Bye, Ruby Tuesday".

  3. #16
    Join Date
    Sep 2012
    Location
    New York
    Posts
    175
    Yeah it probably wasn't worth it but I got paid for my time, thanks for all the explanations... Man I hate those continental boxes

  4. #17
    Join Date
    Sep 2012
    Location
    New York
    Posts
    175
    So rx11 is a flush that can be used for ac and refrigeration any other flushes you use ?

  5. #18
    Join Date
    Oct 2012
    Location
    Wisconsin
    Posts
    4,430
    Quote Originally Posted by AllStateTech View Post
    So rx11 is a flush that can be used for ac and refrigeration any other flushes you use ?
    I've only used rx11 from nucalgon, that seems to be the only flushing solvent the wholesalers around here carry.

    I don't use it all the time, usually only if there is a restriction inside of a coil or if the tubes are full of baked oil or burnout residue, stuff like that.

    I know its a volitle solvent and will evaporate, but I don't like the idea of the residue of whatever it flushed being left in the system. So whatever I am flushing, I will typically cut the tubing at the low spot (ie. bottom of the coil, low spot in tubing) and blow it out with nitrogen when I am done, so all the crap will drain out.

  6. #19
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,560
    Quote Originally Posted by Mike19 View Post
    Well you can do what I always do. When you get everything up and running you can drive off in your van singing "Good Bye, Ruby Tuesday".
    Yes, knowing full well that next time might be my 19th nervous breakdown, and I can't get no satisfaction.

    But, time is on my side.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  7. #20
    Join Date
    Sep 2012
    Location
    New York
    Posts
    175
    Lol

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