Results 1 to 12 of 12
  1. #1
    Join Date
    Mar 2002
    Posts
    120
    A friend of mine that has industrial refrigeration experience only called me about an ice machine that he has been working on at his deer camp. I drove down there Sat. evening and this is what I found:
    R-12 unit
    suction pressure: 20#
    Disharge: 100# (cond. fan was running)
    ambient room temp: 83Deg F
    subcooling:11 Deg F
    superheat: 56 Deg F
    recirculating water temp: 80 Deg F

    Based on the superheat, I think it is the TXV. I unplugged
    the water pump to see if it would start frosting up and it didn't; the superheat went down a little but not much. I expected the suct. press. to drop quit a bit, but it stayed right at 20#. Dish press. dropped a little. The
    hot gas line didn't feel like it was leaking by, just slighty warm past the solenoid. The filter is vertical and the liq. line loops down and into the bottom of the TXV(TXV is Horizontal) then exits where I had expected there to be an adjustment stem...is there no way to set this type? What do you think I should do, replace the TXV?

    Thanks for any input...
    AS LONG AS MY PEOPLE ARE EATING GOOD, I DON'T CARE ABOUT NOTHING ELSE.

  2. #2
    Join Date
    Feb 2002
    Location
    Yuma, Arizona
    Posts
    924
    What model? E,G, Get a Manitowoc book from you supply house and do the ten steps to diagnose the unit.

    It is normal for the pressures to move and the s/h changes a lot.

    Look at the ice pattern is the plate full all the way?
    Lot's of questions. We need more info to help out more.

    Yuma
    What is snow? Is it that white stuff in a freezer?

  3. #3
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,265
    If it's a 400 machine with R12 it's an E-Series:

    http://www.manitowocice.com/Service/ServiceManuals.asp

    Study the manual, and do the series of Manitowoc's operational checks as Yuma suggested.

  4. #4
    boy those are some really odd readings considering what you did with shutting down the water flow.


    hmmmm....

    I dont believe you have a full charge.
    R-12 for that ambient and load should be higher.


    But then also .... your suction should have plumeted.


    Have fun.... that was a unique design. Ice-o-matic has adopted it themselves.


    Hope all the pieces are there to get the siphon working right.


    Oh .... those were the days..... (and I'm SO GLAD they're gone!)

  5. #5
    Join Date
    Mar 2002
    Posts
    120
    Thanks for the link and the input. I'll let you know what
    happens....really...I will..just may be a few days. Later
    AS LONG AS MY PEOPLE ARE EATING GOOD, I DON'T CARE ABOUT NOTHING ELSE.

  6. #6
    Join Date
    Jul 2005
    Posts
    10

    low charge

    palte icing up at all? weigh in the charge, check the txv if frosting at elbows, temp probe the plate, etc, adj, the water flow/fan stopping, sounds like low on charge, inefficient compressor, bad txv one of the three...Except the @20# suction R-12 , is that at the beginning of freeze cycle middle or end or in harvest? if its in freeze, ask your friend if anyone else just recently , charged that baby by ear... if so what color of drum was it and ,

    [Edited by meltdown on 07-20-2005 at 02:34 AM]

  7. #7
    Join Date
    Mar 2005
    Location
    Louisiana
    Posts
    211
    Not 100% sure on an R-12 unit but I takecare of 15 of them at work, the units is R-404, suction pressure at freeze cycle runs on avg. of 45 and 80 during harvest.
    As I said not sure on the R-12 but I also think your pressure should be a little higher, call Manitowoc, I find them to be very helpful,

  8. #8
    Join Date
    Aug 2005
    Posts
    10
    bad compressor. that is the test,.. to stop the water pump, and it should be able to pull down into the lower teens within a couple of min,s with no load.

  9. #9
    Join Date
    Mar 2002
    Posts
    120

    by lower teens , do you mean pressure or temp? thanks

    havn't been back down there yet , but he will proabably
    want to soon.
    AS LONG AS MY PEOPLE ARE EATING GOOD, I DON'T CARE ABOUT NOTHING ELSE.

  10. #10
    Join Date
    Feb 2002
    Location
    Yuma, Arizona
    Posts
    924
    Originally posted by icemeister
    Study the manual, and do the series of Manitowoc's operational checks.
    That quote WILL SOLVE ALL your problems.
    Don't guess, KNOW.

    It will tell you if low charge, bad TXV or bad compressor. It's the best tool you can use. Mannies are easy, if you learn to follow the check list, it never fails.

    Yuma,
    What is snow? Is it that white stuff in a freezer?

  11. #11
    Join Date
    Aug 2005
    Posts
    10
    By lower teens Im refering to the low side pressure. Thats an old unit with lots of run time on it im sure.

  12. #12

    Cool Mannies are easy, That quote will always solve your problems!

    Originally posted by Yuma
    Originally posted by icemeister
    Study the manual, and do the series of Manitowoc's operational checks.
    That quote WILL SOLVE ALL your problems.
    Don't guess, KNOW.

    It will tell you if low charge, bad TXV or bad compressor. It's the best tool you can use. Mannies are easy, if you learn to follow the check list, it never fails.

    Yuma,
    Dont Guess, KNOW, even if youre not a good babysitter, just ask Yuma, And remember the heat will cook your brain, so dont have all the fun!

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