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  1. #1
    Join Date
    Dec 2009
    Posts
    35

    walk in refrigerators

    what happens to the evap coil when the door is left open when a delivery comes, I was told the coil ices up why is that. and also what happens to the walk in when the gaskets are leaking.

  2. #2
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    1,384
    It can ice up in either case. The evaporator coil runs colder than 32 degrees F. The cold coil attracts humidity to it. The only time it gets a chance to thaw out is when the box is down to temperature and the compressor shuts off. If the door is left open too long or the gaskets are bad, the compressor will run too long without enough resting time for it to defrost itself.

  3. #3
    Join Date
    Dec 2009
    Posts
    35
    than you that makes total sense do you recommend any good refer books

  4. #4
    Join Date
    May 2011
    Posts
    6

    ICE ON EVAP

    YOU CAN AD A DOOR SWITCH TO TURN OFF EVAP FANS WHEN DOOR IS OPENED

  5. #5
    Join Date
    Aug 2006
    Posts
    2,607
    In certain circumstances it could overload the compressors. This is why production walk-in refrigerators and freezers have suction regulators. I've worked on Military containers, that have suction controls and liquid injection.

  6. #6
    Join Date
    Jan 2010
    Posts
    6,579
    Quote Originally Posted by COLEMON2 View Post
    YOU CAN AD A DOOR SWITCH TO TURN OFF EVAP FANS WHEN DOOR IS OPENED
    Works great till someone leaves the door open. You then have a real problem.

  7. #7
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
    Posts
    1,384
    Quote Originally Posted by COLEMON2 View Post
    YOU CAN AD A DOOR SWITCH TO TURN OFF EVAP FANS WHEN DOOR IS OPENED
    This would be a great idea IF you WANT the evap to freeze up. Otherwise, just CLOSE THE DOOR!

  8. #8
    Join Date
    Jul 2008
    Location
    Mid Michigan
    Posts
    319
    Leaving to door open for deliveries doesn't really bother me.

    Now we have a big fundraiser every year at work. I have found that the

    kitchen workers will leave the walk in freezer door open for hours at a time

    then they wonder why the freezer isn't hold temp? Get them trained

    up better now.
    Waddya mean don't thaw out the frig with a knive?

  9. #9
    Join Date
    Feb 2011
    Location
    Indianapolis, IN
    Posts
    34
    This is also why you need a off-cycle defrost to allow the box to defrost its self out, @ lest 2x in 24 HRS. every 12 hrs

  10. #10
    Join Date
    May 2011
    Posts
    6

    location

    Quote Originally Posted by ammoniadog View Post
    This would be a great idea IF you WANT the evap to freeze up. Otherwise, just CLOSE THE DOOR!
    depends on amount of common sense

  11. #11
    Join Date
    May 2011
    Posts
    6

    thanks

    Quote Originally Posted by madhat View Post
    In certain circumstances it could overload the compressors. This is why production walk-in refrigerators and freezers have suction regulators. I've worked on Military containers, that have suction controls and liquid injection.
    Nice info thanks for information

  12. #12
    Join Date
    Nov 2004
    Location
    White Lake, MI
    Posts
    973
    Simple strip curtain helps - costs about $100. It wll pay for itself in months.

  13. #13
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,562
    Moved to Refrigeration and ice making forum.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

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