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Heatcraft wiring diagram

Discussion in 'Refrigeration' started by Iraqveteran, Jun 3, 2012.

  1. Iraqveteran

    Iraqveteran Moneyshot

    Got a Heatcraft walk-in cooler...the wiring diagram is completely gone, including the panel the diagram should be on.

    Model is TLF040BE


    Here is my question...its got heating elements in the drain pan, but no heating elements in the coil itself. The system is wired up to shut off the fan in defrost, which would make sense if there were heaters running thru the coil. But there isn't.

    And they are having problems with ice forming on the coil surface and not melting during defrost. I can increase the defrost time (Grasslin timer), but don't believe it will be the best solution.



    So, anyone got a wiring diagram for this model. Specifically regarding defrost controls and whether or not the fans should be operation 24/7 or if the fans are supposed to shut off during defrost.
  2. crackertech

    crackertech assholiness

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    Fl/IN
  3. Stephy

    Stephy Dawg

    Messages:
    9,655
    Location:
    Georgia
    Call Heatcraft in Stone Moutian Ga. in the morning, ask for Archie {I guess he's still alive}..
    The number is in the van, and I don't have any pants on.....

    :shocked:
  4. crackertech

    crackertech assholiness

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    59,970
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    Fl/IN

    I know Archie worked with him many a time.
  5. Bankey

    Bankey I'm Something Else

    does Archie wear pants?
  6. crackertech

    crackertech assholiness

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    59,970
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    Yes he dose. Sorry Ken.
  7. Bender

    Bender Promoted to Regional Turd Polisher

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    Mamby Pamby Land
  8. crackertech

    crackertech assholiness

    Messages:
    59,970
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    Fl/IN

    It should be 4 times a day. 45 minutes.
  9. Bender

    Bender Promoted to Regional Turd Polisher

    Messages:
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    Location:
    Mamby Pamby Land
    In a perfect world, I agree.....

    Most of mine I set up with 5 defrosts.....

    3 shorter ones during the open times and 2 longer ones during the closed times.....

    It keeps the damn idiots from calling when their cooler hits 40 degrees for a few minutes.....
  10. Iraqveteran

    Iraqveteran Moneyshot


    Originally it was set-up for 4 defrosts a day, every six hours, for 30 minutes each.

    I now have it set for 6 defrosts a day, every 4 hours. 8am, noon, 4pm, and 8pm are all 30 minutes. And midnight and 4am defrosts are both set for 45 minutes.

    I also adjusted their thermostat. It was originally maintaining 34-36°. This is a small produce cooler at an Olive Garden. I now have it maintaining 37-39°....which is withing both health department specs and Olive Garden specs.


    I am going back tomorrow. Someone bypassed the disconnect switch for the evaporator. I gotta rewire it back into the circuit so it shuts off the evap and breaks the signal to the solenoid as well.
  11. Stephy

    Stephy Dawg

    Messages:
    9,655
    Location:
    Georgia
    little short Albanien fella?
    Bald headed?

    You kiddin?

    :bowdown:
  12. MOFO the psychic gorilla

    MOFO the psychic gorilla New Member

    Messages:
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    Location:
    sitting on two achers
    Do they have the swinging saloon doors or real doors? Is the whole thing icing up equally on both sides? From the low profile ones I've seen they seem to like a lower SH setting to feed both sides equally. I would go fans off during defrost if you have termination controls in the coil. They always prop the door open for getting in and out of the freezer naturally :banghead:
  13. jpsmith1cm

    jpsmith1cm Professional Un-thawer

    Messages:
    1,072
    I've seen similar setups. The heater in the pan could be the primary defrost heater as well as pan heat. Depends on the size of that heater.

    Watch for a slight undercharge causing both uneven feed and excess frost formation due to low coil temps, particularly when it is cooler at night and the condenser floods up.
  14. crackertech

    crackertech assholiness

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    For real.
  15. generaltech1

    generaltech1 A not so new member

    Messages:
    601
    Dont know if this helps but I had a heatcraft where the evap fans were wired to the hot side of the contactor and they never shut off in defrost. They were getting icicles on the ceiling of the freezer. The other issue was that there were 2 evaporators on one condenser with only one solenoid valve, so when it did go into defrost, it would cycle on and off to try to pump down the second evaporator(eventually took out the compressor from short cycling). Corrected the contactor wiring, added another solenoid to the 2nd evaporator...all good.

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