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  1. #1
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    06D oil question

    I have a liebert unit with 2 O6D compressors. Both units are charged to manu specs, and use the same condensor and evap coil. On the top compressor, when I look in the oil glass, I see the oil being kind of sprayed on the glass. When I look at the bottom compressor glass, I don't see the oil being splattered on the window. What I do see is some small bubbles swirling in the oil, and eventually the oil foams on top.

    Both of these compressors are original, and manued on the same day according to the stickers. I am just curious why there is a difference in how the oil appears in the window. thanks
    The main thing is to keep the main thing the main thing!

    If "the grass is greener on the other side", it likely has been fertilized with Bull$hit!

  2. #2
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    Quote Originally Posted by nchvac View Post
    I have a liebert unit with 2 O6D compressors. Both units are charged to manu specs, and use the same condensor and evap coil. On the top compressor, when I look in the oil glass, I see the oil being kind of sprayed on the glass. When I look at the bottom compressor glass, I don't see the oil being splattered on the window. What I do see is some small bubbles swirling in the oil, and eventually the oil foams on top.

    Both of these compressors are original, and manued on the same day according to the stickers. I am just curious why there is a difference in how the oil appears in the window. thanks

    It is called oil windage, the turbulence from the crankshaft are whipping the oil around and causing the disturbance.

    Superheat, compressor bearing and ring condition and oil level all have an effect on how much the oil gets disturbed...

    The proper oil level is 1/3 up the glass from the bottom to no more than half the glass...Higher levels can really get whipped, lower levels causes the oil to run hotter and somewhat "spray" around inside the crankcase...

    Extremely low superheat will cause a bizarre foaming of the oil too, it will also make the level look too high.

    GT
    If a day goes by and you have learned nothing, I hope you got a lot of sleep.

  3. #3
    Join Date
    Jun 2008
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    not that 3/8 is incorrect but

    The oil level for 06CC size 16 to 37 Cfm compressors and all 06D compressors should be at 1/4 to 3/4 of the sight glass. The oil level for 06CC size 50 to 99 Cfm compressors and all 06E compressors should be at 1/8 to 3/8 of the sight glass.

  4. #4
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    the evap coil and condeser coils has seperate feeds for each circuit/stage

    when everything is operating properly, the levels should be at 3/8 sight glass as stated

    did the system have refigerant leaks



    .

  5. #5
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    Lexington, NC
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    The system did have a leak last year. I am thinking real quick off the top of my head and I can't remember for sure which circuit it was, but the leak was on the condensor in one of the U bends.
    I have toped off both circuits before to manu's specs.
    The main thing is to keep the main thing the main thing!

    If "the grass is greener on the other side", it likely has been fertilized with Bull$hit!

  6. #6
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    Apr 2006
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    too much oil in the sump can cause foaming, due to the crankshaft hitting it

  7. #7
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    Quote Originally Posted by coolerinfrederick View Post
    too much oil in the sump can cause foaming, due to the crankshaft hitting it
    slugging liquid also causes a foamy sight glass


    but it is important to never bring oil level past a half sight glass especially on Carrier semi's



    .

  8. #8
    Join Date
    Jun 2008
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    73
    "slugging liquid also causes a foamy sight glass"

    really? I thought it causes broken reeds, rods etc. Your getting slugging, washout, and floodback all mixed up.

    "but it is important to never bring oil level past a half sight glass especially on Carrier semi's"

    first off it's a Carlyle not a Carrier. 2nd, as I've already stated it's 3/8 for a O6E. 3/4 for a O6D.

    Check your superheat. That is refrigerant boiling out of the oil. You may have some minor floodback

    Not that it matters, but I'd be curious to see what happens to the splashing if the rotation of the compressor was reversed.

    edit: actually The bubbling compressor probably wasn't running as long, probably just some off-cycle migration. Wouldn't hurt to check your crank case heater and any pump down, pump out, etc. Is the condenser above the compressor?
    Last edited by rick james; 05-11-2010 at 09:46 PM.

  9. #9
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    Quote Originally Posted by rick james View Post
    "slugging liquid also causes a foamy sight glass"

    really? I thought it causes broken reeds, rods etc. Your getting slugging, washout, and floodback all mixed up.

    "but it is important to never bring oil level past a half sight glass especially on Carrier semi's"

    first off it's a Carlyle not a Carrier. 2nd, as I've already stated it's 3/8 for a O6E. 3/4 for a O6D.

    Check your superheat. That is refrigerant boiling out of the oil. You may have some minor floodback

    Not that it matters, but I'd be curious to see what happens to the splashing if the rotation of the compressor was reversed.

    edit: actually The bubbling compressor probably wasn't running as long, probably just some off-cycle migration. Wouldn't hurt to check your crank case heater and any pump down, pump out, etc. Is the condenser above the compressor?

    I thought I was harsh...


    #1 on the list today, you are 100% wrong on the 3/4 sight glass deal...The reason for the lower oil level for the E series compressors was a design flaw, they had an issue with carry over and the change was made...

    While the maximum oil level on an O6d is 3/4 of a glass, that is with the compressor off, not while running...while running, 1/2 glass tops....

    The proper oil level for an O6D in an air conditioning application is 1/3 to 1/2 glass......


    As for the comment of the bubbling of the oil, you left out "if the sight glass is full of bubbles", a little bubbling is considered "normal" a long as the oil is not sloshing....

    Lastly, who do you think makes the Carlyle compressors? Carrier and Carlyle are like Lincoln and Ford......


    GT
    Last edited by GT Jets; 05-11-2010 at 11:32 PM. Reason: edited reason for change
    If a day goes by and you have learned nothing, I hope you got a lot of sleep.

  10. #10
    Join Date
    Jun 2008
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    73
    [QUOTE=GT Jets;6652352]#1 on the list today, you are 100% wrong on the 3/4 sight glass deal...The reason for the lower oil level for the E series compressors was a design flaw, they had an issue with carry over and the change was made...

    While the maximum oil level on an O6d is 3/4 of a glass, that is with the compressor off, not while running...while running, 1/2 glass tops....

    The proper oil level for an O6D in an air conditioning application is 1/3 to 1/2 glass......


    page 12 (book, page 14 adobe)
    http://www.carlylecompressor.com/Fil...ver_LOWRES.pdf

    Have a great night


    The whole bottom half of the page has a big picture for you to look at and in big writing says "operating levels".

    so if your running a E at 1/2 your to high, and if your running a D at 3/4 you don't need to install a angle valve and drain. Theres more on the top of page 13. The first time I made this claim I wasn't making it, it was cut and pasted from the manufacturers lit. If you want to argue with them knock yourself out, let me know when you change their minds
    Last edited by rick james; 05-12-2010 at 12:04 AM.

  11. #11
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    Quote Originally Posted by rick james View Post
    "slugging liquid also causes a foamy sight glass"

    really? I thought it causes broken reeds, rods etc. Your getting slugging, washout, and floodback all mixed up.

    "but it is important to never bring oil level past a half sight glass especially on Carrier semi's"

    first off it's a Carlyle not a Carrier. 2nd, as I've already stated it's 3/8 for a O6E. 3/4 for a O6D.

    Check your superheat. That is refrigerant boiling out of the oil. You may have some minor floodback

    Not that it matters, but I'd be curious to see what happens to the splashing if the rotation of the compressor was reversed.

    edit: actually The bubbling compressor probably wasn't running as long, probably just some off-cycle migration. Wouldn't hurt to check your crank case heater and any pump down, pump out, etc. Is the condenser above the compressor?
    when i posted Carrier at first i figured everyone knew the only semi-hermetic compressor that goes in a Carrier is a Carlyle

    now that i think about it your right i should of said Carlyle

    for guys just in the trade or learning, you correct the proper terms need to be used

    now that that's out of the way

    whats the difference in a 06D that the level needs to be 3/4?

    i posted earlier, "slugging liquid also causes a foamy sight glass"

    "I thought it causes broken reeds, rods etc. Your getting slugging, washout, and floodback all mixed up"

    the above sentence in red is yours, what is your basis for me being mixxed up?

    i have worked on 100's of Carrier/Carlyle semi's, and i am always ready and willing to learn something new but thanks for trying anyway


    .

  12. #12
    Join Date
    Oct 2002
    Location
    Lexington, NC
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    Quote Originally Posted by rick james View Post
    "slugging liquid also causes a foamy sight glass"

    really? I thought it causes broken reeds, rods etc. Your getting slugging, washout, and floodback all mixed up.

    "but it is important to never bring oil level past a half sight glass especially on Carrier semi's"

    first off it's a Carlyle not a Carrier. 2nd, as I've already stated it's 3/8 for a O6E. 3/4 for a O6D.

    Check your superheat. That is refrigerant boiling out of the oil. You may have some minor floodback

    Not that it matters, but I'd be curious to see what happens to the splashing if the rotation of the compressor was reversed.

    edit: actually The bubbling compressor probably wasn't running as long, probably just some off-cycle migration. Wouldn't hurt to check your crank case heater and any pump down, pump out, etc. Is the condenser above the compressor?
    I made the observation at the startup after an extended off cycle. This is the only time that both compressors on this unit will run together. No crank case heater on this liebert unit. The compressors are housed in the indoor section which is a ductless unit that sits in the IT room. the condensor sits right outside the room on the same level.
    The main thing is to keep the main thing the main thing!

    If "the grass is greener on the other side", it likely has been fertilized with Bull$hit!

  13. #13
    Join Date
    Jun 2008
    Posts
    73
    "whats the difference in a 06D that the level needs to be 3/4?"

    No one says it needs to be. For the forth time, the manufacturer says can be as high as. When theres no angle valve (which is just about aways on a D) that is a big difference.

    theres about 5 places in the book linked (which is probably also on your van) that says bad things happen when a E exceeds 3/8. Throw your half a site glass rule of thumb in the trash

    just started, no crank case heater, bottom compressor lower then the condenser and evaporator.

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