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Thread: icy p

  1. #1
    Join Date
    Oct 2004
    Posts
    15

    Hmm icy p

    can someone help to solve the problem of ice accumelation on the p-trap of the suction line
    in an walk-in freezer the condensing unit is on top of the roof ,and the suction line that comes out of the roof structure is completely sealed from the dripping condensations down the suction pipe,any help is highly appreciated

  2. #2
    Join Date
    Sep 2002
    Posts
    12,516

    I would insulate the line well

    To me it's worth it in a freezer to pump it down, cut the line, put foil tape over each end, and slide the armaflex on. Push it back from the joint, take off the foil tape, Stay-Brite in a coupling, and after it cools let the armaflex spring back together.

    Just out of curiousity - tell me how there is ever liquid water dripping inside a freezer?

    PHM
    ---------


    Quote Originally Posted by coolhye View Post
    can someone help to solve the problem of ice accumelation on the p-trap of the suction line
    in an walk-in freezer the condensing unit is on top of the roof ,and the suction line that comes out of the roof structure is completely sealed from the dripping condensations down the suction pipe,any help is highly appreciated
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  3. #3
    Join Date
    Jul 2008
    Location
    Denver, CO
    Posts
    4,229
    If old armaflex gets wet it will always get iced up and needs to be replaced. I would do what poodlehead suggested.

  4. #4
    Join Date
    Oct 2004
    Posts
    15
    Hi Poodle,

    the condensation that rolls down from suction line above the roof through ceiling
    to the end at the p-trap the last stop point where it freezes.

    that is what was meant

  5. #5
    Join Date
    Sep 2002
    Posts
    12,516

    Is the suction line not insulated?

    What is the refrigerant, suction pressure, and suction superheat?

    Isn't the suction line either insulated or covered with ice?

    Is the condesation that rolls down from suction line above the roof through the ceiling ever ice? That melts and turns to water?

    I'm trying to picture just what is happening here.

    PHM
    --------




    Quote Originally Posted by coolhye View Post
    Hi Poodle,

    the condensation that rolls down from suction line above the roof through ceiling
    to the end at the p-trap the last stop point where it freezes.

    that is what was meant
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  6. #6
    Join Date
    Oct 2004
    Posts
    15

    Iced-up p

    Hi Poodle head,

    the refrigerant is 404a,the suction psi 30and the superheat is 7 f
    and all the suction line is insulated

    what I am wondering about where this ice is coming from and build up at the p- trap

    thanks for all the concerns and effort you have PHM

  7. #7
    Join Date
    Sep 2002
    Posts
    12,516

    Well; let's see what we know

    Ice is frozen water so we have a source of non-frozen water.

    Water tends to flow down so the source is above the P trap.

    My first searches would be for a roof leak, a roof perforation flashing leak, or an air leak - carrying in humidity.

    Have you ever seen fluid water running down the suction riser?

    When does it happen?

    Only when it rains? Or all the time?

    PHM
    ---------




    Quote Originally Posted by coolhye View Post
    Hi Poodle head,

    the refrigerant is 404a,the suction psi 30and the superheat is 7 f
    and all the suction line is insulated

    what I am wondering about where this ice is coming from and build up at the p- trap

    thanks for all the concerns and effort you have PHM
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

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