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  1. #14
    Join Date
    Oct 2012
    Location
    San Diego CA.
    Posts
    19
    Thanks for all the advise. I did cut out all the low spots and blew a rag- plug thru the line set. Started one side of one unit today and low and behold no problems. Will be hopefully start other circuits tommorow. I pulled a deep vac 4 times and introduced 410 each time to grab any moisture. Oil at compressers looks good and I am getting 40 degrees at evap coil.

  2. #15
    Join Date
    Nov 2005
    Posts
    1,350
    I have been down this road and I am still on it. I am in the process of replacing both compressors. Is it a Trane?
    I STARTED WITH NOTHING, AND I STILL HAVE MOST OF IT!

  3. #16
    Join Date
    Oct 2012
    Location
    San Diego CA.
    Posts
    19
    Yes and I plan on changeling out compressor oil a couple of times just to make sure it's more poly than mineral

  4. #17
    Join Date
    May 2002
    Location
    evansville indiana
    Posts
    943
    Quote Originally Posted by captn-b View Post
    Yes and I plan on changeling out compressor oil a couple of times just to make sure it's more poly than mineral
    as I mentioned you could use an oil refractometer and know for sure ...

    I will shut up now...
    mikeacman

  5. #18
    Join Date
    Oct 2012
    Location
    San Diego CA.
    Posts
    19
    I will be picking one up as you suggested
    I definetly see a diferance in the oil and have ordered poly oil in to replace . I just can't believe how expensive it is
    Thanks

  6. #19
    Join Date
    Oct 2012
    Location
    San Diego CA.
    Posts
    19
    It is a Trane and new oil is 4 days out. I hope the compressors last that long there not acting up or over heating I just don't like the look of the oil thru the sight glass

  7. #20
    Join Date
    Oct 2012
    Location
    San Diego CA.
    Posts
    19
    Allstar08,
    What were the problems you that you were having and how many times did you change the oil
    I noticed after the first day we had to drain some of the oil because the compressors were getting to full

  8. #21
    Join Date
    May 2002
    Location
    evansville indiana
    Posts
    943

    Unhappy

    Quote Originally Posted by captn-b View Post
    Allstar08,
    What were the problems you that you were having and how many times did you change the oil
    I noticed after the first day we had to drain some of the oil because the compressors were getting to full
    im not the OP ....but I had a run in with mixed oil....



    I had a factory ordered water cooled (condensor ,air over evap) split that was built to run on R134A and carrier filled the comps with mineral oil .... I spent a couple days and if I remember went thru 20 gallons (for two 06E's) of oil before I was under 5% mineral to poe ....
    im thinking around 5 changes per compressor ....
    134 because it was a refrigerator factory and they wanted a cooling system for their offices that ran on 134A,just like their product

    my experience was the mineral tended to lay out in the system and as you got more poe in it all started coming back at a rate that I had to babysit it .... at first the oil just left and did not come back . I had a gut feeling before I started it that it was wrong but was shown it was ordered for 134A service . My gut was right.
    .

    Without an oil refrac I would have been guessing ....that unit has been running close to ten years now with no compressor failures....
    mikeacman

  9. #22
    Join Date
    Oct 2012
    Location
    San Diego CA.
    Posts
    19
    Thanks for the info
    I flushed the holy crap out of the system but there is no way to get all the mineral oil out
    I hope the compressor collects most of it and it doesn't take to many changes
    I get the two oils don't mix but I wouldn't think it would damage the compressors to bad scrolls are fairly forgiving ( I pray )

  10. #23
    Join Date
    May 2002
    Location
    evansville indiana
    Posts
    943
    I started with 100% wrong oil ,,,my case was extreme ,,,being burned by that I just won't guess anymore ....sounds like you have a handle on it ...
    mikeacman

  11. #24
    Join Date
    Aug 2006
    Location
    Mixing oil and fire with a big spoon.
    Posts
    4,492
    i know that you are just asking about oil changes, but you did change out the compressors too...right? txv's? you might consider running for the border when this is done. change your phone number. change the company name. mother nature doesn't care if your budget can't handle it. r22 and r410a are 2 very different refrigerants and they require the proper engineering and design to make them work. you will probably be changing out the evaporators before too long.

    not that it has to do with your original question, but why did the old compressors not last long? if it wasn't corrected, then, you should know that the new compressors are more expensive to replace than the old compressors were.
    "If you pull one more stunt like you just pulled with Tommy, you won't have to get on a plane because I will personally kick your ass from here to Korea!" - Best of the Best

  12. #25
    Join Date
    Oct 2012
    Location
    San Diego CA.
    Posts
    19
    Yes I changed out all the goodies and rerouted the line set to get rid of the traps and low spots
    Trane confirmed that the existing coil could handle 410
    The existing unit killed quite a few compressors and it looks like it was because the way it was set up it kept lugging the compressors with oil
    I'm not using the hot gas bypas but frost stats instead and so far were not slugging

  13. #26
    Join Date
    Oct 2012
    Location
    San Diego CA.
    Posts
    19
    Thanks for the info

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