Cvhve oil log ref??"?? - Page 2
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  1. #14
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    Mar 2004
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    Quote Originally Posted by motoguy128 View Post
    Sounds like you're not into the 40's because your simply short on capacity since your effciency is crap... meaning you've hit RLA, but just are getting proper heat transfer.

    What are the approach temps?
    Hes got 27 gals of waste oil floatin around in there ....... Approach temps dont matter squat right now .
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  2. #15
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    Jan 2011
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    tt, west indies
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    Quote Originally Posted by Healey Nut View Post
    Hes got 27 gals of waste oil floatin around in there ....... Approach temps dont matter squat right now .
    Analysis shows I 91.2% oil, 1.4% coolant and 7.4% solids.so uess I am gettin out mainly oil yay!....but will I get back lost efficency? because I've removed abt 12 gallons and no improvment water temps still hi like

  3. #16
    Join Date
    Oct 2011
    Location
    Upstate NY
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    55
    Actually, I would be interested to see the trend/ relationship between the evap approach and the amount of oil removal...
    If the amount of oil suspected to be in the machine is accurate, the evap approach should be out of sight (10+) & coupled with the current condenser conditions, I'm surprised that machine isn't in or near stall/surge.
    I agree with earlier post, at 14# head, either non-condesables exist or the instrumentation is Inaccurate...

  4. #17
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    Aug 2009
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    Prattville, Alabama
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    There is so much oil, it probably has some oil floating on top (as Healy Nut said) of the refrigerant/oil mixture in the evaporator. The refrigerant is saturated to the point that it will not "absorb" any more. Conditions won't improve until the "excess" oil floating on top is removed (actually, absorbed into the refrigerant) and then further oil that is removed will decrease the amount of oil that is dissolved in the refrigerant. That oil floating on top can lower the evaporator pressure further. The layer of oil is a restriction.
    Last edited by Nuclrchiller; 07-30-2012 at 05:17 PM. Reason: clarified "refrigerant/oil mixture in the evaporator"

  5. #18
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    Aug 2009
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    Prattville, Alabama
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    Quote Originally Posted by mr hottstepper View Post
    Analysis shows I 91.2% oil, 1.4% coolant and 7.4% solids.so uess I am gettin out mainly oil yay!....but will I get back lost efficency? because I've removed abt 12 gallons and no improvment water temps still hi like
    Has high entering condenser water temp been resolved ?

  6. #19
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    Jan 2011
    Location
    tt, west indies
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    127
    Quote Originally Posted by tcy612 View Post
    Actually, I would be interested to see the trend/ relationship between the evap approach and the amount of oil removal...
    If the amount of oil suspected to be in the machine is accurate, the evap approach should be out of sight (10+) & coupled with the current condenser conditions, I'm surprised that machine isn't in or near stall/surge.
    I agree with earlier post, at 14# head, either non-condesables exist or the instrumentation is Inaccurate...
    I am on my way to d job site should be ther in abt 2 hs,will check approaches den

  7. #20
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    Jan 2011
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    tt, west indies
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    Quote Originally Posted by Nuclrchiller View Post
    Has high entering condenser water temp been resolved ?
    Gonna check on that

  8. #21
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    Jan 2011
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    tt, west indies
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    127
    Quote Originally Posted by Nuclrchiller View Post
    There is so much oil, it probably has some oil floating on top (as Healy Nut said) of the refrigerant/oil mixture in the evaporator. The refrigerant is saturated to the point that it will not "absorb" any more. Conditions won't improve until the "excess" oil floating on top is removed (actually, absorbed into the refrigerant) and then further oil that is removed will decrease the amount of oil that is dissolved in the refrigerant. That oil floating on top can lower the evaporator pressure further. The layer of oil is a restriction.
    Well I will be removing more oil later tonight that shoud be the last of it

  9. #22
    Join Date
    Jan 2011
    Posts
    1,109
    It is also likely that once you remove all the oil, the machine will be short of refrigerant. That was my experience years ago when I removed over 15 gallons of oil from a machine that had the eductor pickup pipe in the wrong place.

    I brought the condition of the charge up to the guy I was assuming the account from. I told him all the refrigerant I had seen looked as clear as water, not like dirty root beer.

    After I took the account over my investigation found that all kinds of oil had been added to the chiller, but none had ever been taken out. When all was said and done I think the chiller was 300# short of R-11.

  10. #23
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    Jan 2011
    Location
    tt, west indies
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    127
    Removed the oil, also found a leak on oil sump gasket , repaird and purged system is working properly now

  11. #24
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    Aug 2009
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    Prattville, Alabama
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    Thanks for the update.

  12. #25
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    Jan 2011
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    tt, west indies
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    More importantly! Thank you for the help

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