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Thread: Walk In Freezer Drain Pan Ice Build Up.

  1. #1
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    Walk In Freezer Drain Pan Ice Build Up.

    So I have a situation!!!!

    I have a walk in freezer drain pan that builds up ice and eventually fills up the pan.

    Drain pan heater and coil heaters all check out, drain is clear, heat tape fine, and pan appears to be level.

    This particular pan has very small 120V blanket" heaters that are sandwiched between the two pans.

    (This pan has a stainless outer pan that is siliconed to the drain pan with the heaters between them)

    The above mentioned heaters between the 2 pans ring out and are getting voltage, but draw minimal amperage.

    I'm not quite sure why they are necessary, also, both pan heaters are only engaged during defrost.

    Anyone have any thoughts??



    Thanks

  2. #2
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    Maybe the pan heaters are supposed to be 220 like whats typically available at a freezer evaporator?
    The btu output will be 4x the output at 120vac. (This is assuming the heaters are actually rated for 240)
    Obviously don't apply 220 if they are in fact 120vac hesters.

    Sent from my SM-S901U using Tapatalk

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  4. #3
    Poodle Head Mikey's Avatar
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    My first suggestion would be to wire the drain pan heaters hot all the time. In a short defrost the pans don't get from -0 degrees to 33 degrees fast enough.

    PHM
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    Quote Originally Posted by chickenfloyd72 View Post
    So I have a situation!!!!

    I have a walk in freezer drain pan that builds up ice and eventually fills up the pan.

    Drain pan heater and coil heaters all check out, drain is clear, heat tape fine, and pan appears to be level.

    This particular pan has very small 120V blanket" heaters that are sandwiched between the two pans.

    (This pan has a stainless outer pan that is siliconed to the drain pan with the heaters between them)

    The above mentioned heaters between the 2 pans ring out and are getting voltage, but draw minimal amperage.

    I'm not quite sure why they are necessary, also, both pan heaters are only engaged during defrost.

    Anyone have any thoughts??



    Thanks
    PHM
    --------
    The conventional view serves to protect us from the painful job of Thinking

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  6. #4
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    purchase a "real" heater element and place into the bottom of the pan

    Measure the length and width of pan .... make a little trip to your Supply House
    Tell your Cat I said "Psst Psst Psst"

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  8. #5
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    Make, model & Ser #s ?

  9. #6
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    I was actually thinking that the pan heater should be energized all the time.

    I'd just have to put a safety in series with it.

    Thanks for the tip.

  10. #7
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    Pan heater comes on during defrost

    Drain LINE heater you can wire either way
    Tell your Cat I said "Psst Psst Psst"

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  12. #8
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    My drain line heaters energize during freeze.
    Do Not energize drain pan heater during freeze. What does the tag say for heater amps?

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    Poodle Head Mikey's Avatar
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    What is the reason not to energize pan heater during freeze?


    Quote Originally Posted by pecmsg View Post
    My drain line heaters energize during freeze.
    Do Not energize drain pan heater during freeze. What does the tag say for heater amps?
    PHM
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    The conventional view serves to protect us from the painful job of Thinking

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    Quote Originally Posted by Poodle Head Mikey View Post
    What is the reason not to energize pan heater during freeze?
    Why the extra load?

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    To keep the drain pan from freezing up.

    Quote Originally Posted by pecmsg View Post
    Why the extra load?
    PHM
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    The conventional view serves to protect us from the painful job of Thinking

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    Insulate the bottom of the pan so it responds quicker thermally, wire in a delay on break relay to keep pan and drain energized during and after the defrost cycle for say 10 minutes. Might just be the ticket and not add extra load.
    A dying culture invariably exhibits personal rudeness. Bad manners. Lack of consideration for others in minor matters. A loss of politeness, of gentle manners, is more significant than is a riot.
    ― Robert A. Heinlein

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  18. #13
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    Quote Originally Posted by Poodle Head Mikey View Post
    To keep the drain pan from freezing up.
    Few months ago Went to a walkin freezer call .... ice is hanging off pan

    Found drain heater no good , over an inch of ice in pan

    I fixed the drain heater , then wired the pan heater on 24-7

    Waited a few days hoping that inch of ice would melt

    Came back 3 days later and its dry

    Hooked pan heater back up to defrost
    Tell your Cat I said "Psst Psst Psst"

  19. #14
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    Quote Originally Posted by Poodle Head Mikey View Post
    To keep the drain pan from freezing up.
    Never had a drain pan freeze unless the heater was bad!

  20. #15
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    So quick update, if anyone is curios!!

    This walk in was custom made with a fancy control panel and everything.
    Upon further investigation I found there was a heater delay in minutes.
    Was set to delay 3 minutes after start of defrost, and off 3 minutes before the end of defrost.
    Not sure why you would need a delay unless you were trying to save energy.
    Anyway, I did away with the delay option, so far so good!!


    Thanks for all of your input and recommendations.

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