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Thread: Copeland scroll oil issues

  1. 10-03-2019, 06:09 AM #1
    hvacrdrew's Avatar
    hvacrdrew
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    Copeland scroll oil issues

    Med temp rack
    1- Copeland ZF40K4E-TWC
    1- Copeland ZF18K4E-TF5
    - Henry S-5890 oil separator
    - OMB oil controls
    -407A
    -POE oil
    -Low pres. 45psi
    -high pres. 240psi
    -suction line temp @ comp. 64* (41* superheat)
    The ZF40 OMB opens, fills up to half glass, OMB closes, runs for 20-25 seconds oil level steadily dropping then repeats. Any ideas why it would be pumping oil out that quick?
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  3. 10-03-2019, 06:13 AM #2
    UmmScott
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    Thats odd for sure man.

    I wouldnt think a scroll would pump out oil like that. Ive seen semi herms do that but not a scroll

    Sent from my SM-G975U using Tapatalk
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  4. 10-03-2019, 07:15 AM #3
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    pecmsg
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    Heres the sheet on the OMB. Are the time delays set properly?

    https://climate.emerson.com/document...us-3584554.pdf
    R I P Icemeister

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  5. 10-03-2019, 07:23 AM #4
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    It has the old style OMB.
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  6. 10-03-2019, 08:29 AM #5
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    This one ?
    Attached Images Attached Images  
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  7. 10-03-2019, 08:31 AM #6
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    Quote Originally Posted by VTP99 View Post
    This one ?
    Yep
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  8. 10-03-2019, 12:49 PM #7
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    Maybe the oil that is fed to the compressor is hot? Is foamy? So is really not much oil .
    So it looks like it fills up with oil, but it's really refrigerant-rich oil being rapidly boiled off.

    Sent from my SM-G950U using Tapatalk
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  10. 10-03-2019, 11:44 PM #8
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    Quote Originally Posted by icy78 View Post
    Maybe the oil that is fed to the compressor is hot? Is foamy? So is really not much oil .
    So it looks like it fills up with oil, but it's really refrigerant-rich oil being rapidly boiled off.

    Sent from my SM-G950U using Tapatalk

    I’ve got a video but I can’t post it for some reason.
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  11. 10-04-2019, 08:12 AM #9
    UmmScott
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    Maybe your oil separator is defective and is constantly bleeding by and you're not getting oil in the OMB feed but liquid refrigerant instead?

    Just an idea. Ive seen plenty of those emerson oil separators have stuck floats and keep bypassing all the time

    Sent from my SM-G975U using Tapatalk
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  12. 10-04-2019, 09:11 AM #10
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    Along with what UmmScott said....

    What's the discharge temp when this is happening?

    Sent from my SM-G950U using Tapatalk
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  13. 10-04-2019, 11:39 PM #11
    indy2000
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    i would be looking at the oil level at adjacent compressors
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  14. 10-06-2019, 06:03 AM #12
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    Quote Originally Posted by UmmScott View Post
    Maybe your oil separator is defective and is constantly bleeding by and you're not getting oil in the OMB feed but liquid refrigerant instead?

    Just an idea. Ive seen plenty of those emerson oil separators have stuck floats and keep bypassing all the time

    Sent from my SM-G975U using Tapatalk
    Wouldn’t the oil be foaming?
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  15. 10-06-2019, 06:08 AM #13
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    Quote Originally Posted by icy78 View Post
    Along with what UmmScott said....

    What's the discharge temp when this is happening?

    Sent from my SM-G950U using Tapatalk
    200*
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  16. 10-06-2019, 06:10 AM #14
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    Quote Originally Posted by indy2000 View Post
    i would be looking at the oil level at adjacent compressors
    The other one is fine.
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  17. 10-06-2019, 11:55 AM #15
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    Quote Originally Posted by hvacrdrew View Post

    I’ve got a video but I can’t post it for some reason.
    What is the debris (in the glass) from?

    Sent from my SM-G950U using Tapatalk
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