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  1. #1
    Join Date
    Mar 2012
    Location
    WV
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    Carrier 19EA Losing oil under low load

    During low load the oil level drops low enough to cause a shut down due to low OP. Was wondering it we were losing it to the evaporator through the demisters because of no differencial psi?

  2. #2
    Join Date
    Oct 2011
    Location
    La.
    Posts
    299
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    You are low on refrigerant!

  3. #3
    Join Date
    Mar 2012
    Location
    WV
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    I don't think so.. Just weighed the charge in 3 days ago..

  4. #4
    Join Date
    Oct 2011
    Location
    La.
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    What is your approach and are your flow rates correct? What do you mean by no diff. Are you running really cold cond water. I have had to over charge in the past to get oil to return during low load. I also would like to know the discharge temp. and other log readings. Help a brother help you.

  5. #5
    Join Date
    Oct 2011
    Location
    La.
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    299
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    If everything is ok, then your next step would be the rear motor bearing.

  6. #6
    Join Date
    Mar 2012
    Location
    WV
    Posts
    21
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    Thanks for the help will follow up shortly

  7. #7
    Join Date
    Feb 2007
    Location
    Baltimore MD ( Balimer, Murilyn)
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    148
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    That always was a problem with 19EA's. Sometimes we added oil in spring and fall and removed it in the summer. 'course that was before all those CFC regs took effect in the 90's.

  8. #8
    Join Date
    Dec 2006
    Location
    Somewhere in Canada
    Posts
    84
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    High speed laby seal assembly

    Sounds like you need to get your head pressure up thereby feeding high pressure refrigerant vapor to your high speed Kingsbury bearing assimbly. With low discharge pressure the oil will be lost through the laby seal into the motor housing and then into the evaporator area. Get your head pressure up.

  9. #9
    Join Date
    Mar 2012
    Location
    WV
    Posts
    21
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    Yes PHd I believe this is whats happening this is the no diff.. I was referring to there demisters behind the thrust assy and there should be a sigh diff psig between the crankcase and the motor housing but with low condenser psig this cannot be achived.. hopefully I'm on the right tract thanks for help al feed back is welcome

    Michael Chaffin UA 625

  10. #10
    Join Date
    Apr 2015
    Location
    Cincinnati, Ohio
    Posts
    14
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  11. #11
    Join Date
    May 2008
    Location
    Central Pennsylvania
    Posts
    519
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    Quote Originally Posted by Lesss390 View Post
    Interesting article, thanks for sharing.

  12. #12
    Join Date
    Jan 2009
    Location
    Not in Iran
    Posts
    1,147
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    if you don't know already but never add oil to a machine that does not need it.
    how do u know if u need oil??
    is there a major oil leak and several gallons on the floor.?
    other than that , don't add oil.

    its easy to add oil just because an alarm says low oil pressure, but that's not the case.

    but the low refrigerant will do this.
    you need a higher head pressure to force the oil tru the system.
    no signature blast'em man blast'em
    !!!KILL THE TERRORIST!!!

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