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  1. #1
    Join Date
    Feb 2008
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    Alabama
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    33

    suction line oil trap

    I helped install a goodman unit today and bossman didn't want to bother with the suction line oil trap the installation guide called for. So now I'm wondering what this might do to the unit in the long run?

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    How long is the vertical.
    Is teh evap above teh condenser.
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  3. #3
    Join Date
    Feb 2008
    Location
    Alabama
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    33
    The evap is about 15 ft higher.

  4. #4
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    Feb 2008
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    Waffleville
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    hey BT? a suciton line trap? in 2008??

    thought they were gone longtime ago...
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  5. #5
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    Jan 2004
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    Lancaster PA
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    If the vapor line makes any kind of upward arc after the evap berore it exists and turns down, to the condenser, that will become the inverted trap.
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  6. #6
    Join Date
    Jan 2004
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    Lancaster PA
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    Quote Originally Posted by beachtech View Post
    hey BT? a suciton line trap? in 2008??

    thought they were gone longtime ago...
    They still want an inverted trap if the evap is above the condenser.

    Many don't want a trap if condenser is above evap any more. Unless its a long line, and or teh vapor line is sized that its velocity is low.
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  7. #7
    Join Date
    Feb 2008
    Location
    Alabama
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    The line set does arc up alittle, maybe a foot as it goes over a supply line, but it never gets higher then the unit. If that'll work great for the customer but I'm still wondering what it's for?

  8. #8
    Join Date
    May 2008
    Posts
    357
    "They still want an inverted trap if the evap is above the condenser.

    Many don't want a trap if condenser is above evap any more. Unless its a long line, and or teh vapor line is sized that its velocity is low "


    So the idea is to keep too much oil from flooding the compressor????
    We were told in school to put a trap if the line was over 10 feet or so and also to put one
    every 10 feet or so of rise>
    td55

  9. #9
    Join Date
    May 2004
    Location
    Rapid City, SD
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    7,415
    I think the reason why they aren't wanted or needed any more is they cause more of a restriction than an aid in returning oil.

    If it's not covered in the book, call the company/supply house and get a for sure answer... warranties are much better that way
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  10. #10
    Join Date
    May 2008
    Posts
    357
    makes sense to me
    td55

  11. #11
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    Jan 2004
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    Lancaster PA
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    Quote Originally Posted by Jevans View Post
    The line set does arc up alittle, maybe a foot as it goes over a supply line, but it never gets higher then the unit. If that'll work great for the customer but I'm still wondering what it's for?
    As long as it goes above the point where the lines come out of the case.

    It helps to prevent oil siphon when the condenser is not running.
    An oil slug hitting the compressor valves can damage them quicker then the refrigerant can.
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  12. #12
    Join Date
    Feb 2008
    Location
    Alabama
    Posts
    33

    Thumbs up

    Thanks beenthere, very helpful info.

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