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  1. #1
    Join Date
    Sep 2002
    Posts
    12,280

    Manitowoc - am I right?

    JDO803W
    9610
    R-404

    Compressor starts and runs.
    Discharge line hot.
    Compressor shell hotter than my delicate fingertips say is reasonable.
    Hot gas line after solenoid is cool.
    Molds do not chill.
    Gauges equalize on startup and then change to:
    Low - 2" vacuum
    High - 200 lbs.
    Subcooling - zero
    I add some R-404 and head pressure increases slightly while subcooling almost immediately becomes 10 degrees.
    Pull the TXV sensing bulb and hold in hot little hand - no change in suction pressure or warm suction line.
    Pull TXV insulation and there is a small amount of frost near powerhead - none on line leaving TXV.

    I conclude that the TXV is defective. Am I correct?

    Alco TXV - #'s:
    B36757-3
    C(or G)T(or 1)5262-0
    119635

    Bristol Compressor M.# M65B163B

    Is that just an off-the-shelf Alco valve?
    Or is it OEM to Manitowoc or something?

    Can I just stick in any old valve which will flow the compressors capacity?

    PHM
    -------
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  2. #2
    Join Date
    Mar 2007
    Location
    Toronto
    Posts
    259
    Never seen a Bristol compressor on any ice machine but Kold-Draft.
    Normally I would say go with the factory TXV (I agree it's very likely the TXV)
    but with the (I think) non-factory compressor go with a generic TXV.

  3. #3
    Join Date
    Oct 2003
    Location
    tidewater, va
    Posts
    2,138
    phm

    diagnosis sounds good. go with oem only valve. bristol is probably original compressor aLlow time for leak checking..may have been a touch low as well...try it in a defrost cycle...if pressures match the book, it is a bettercas for the valve being the culprit


    r404a

  4. #4
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,665
    When it's a water cooled machine some tricks don't work so well
    Better to weigh the charge out for a double check when you go back

    They had some Bristols for a while Doc

  5. #5
    Join Date
    Nov 2001
    Location
    east kansas
    Posts
    8,032
    I thought the J model had a TXV problem a long time ago. I remember a couple of issues.

    I kinda miss working on ice machines regularly.
    Beware of advice given by some guy on the Internet.

  6. #6
    Join Date
    Dec 2002
    Location
    Canton, MI
    Posts
    40
    I think you found the problem.

  7. #7
    Join Date
    Feb 2008
    Posts
    96
    Sounds correct to me....but remember to weigh in the charge when you change the TXV and if there are two, change them both. Yu can use an over the counter TXV. However, I would use the OEM which is a Danfoss and is a very good valve. I have recently changed a TXV on a little undercounter Manitowoc with a truck stock Danfoss TXV and I didn't even have to adjust the valve. If the unit is in bad shape, recommend an Iceomatic as a replacement. That's what I would do

  8. #8
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,665
    Quote Originally Posted by QTEMP View Post
    However, I would use the OEM which is a Danfoss and is a very good valve.
    Q I would use an OEM valve too but honestly you like how those valves work
    Less failures than the Alcos but
    With out a doubt the Sporlans they used to use worked better at metering refrigerant IMO

  9. #9
    Join Date
    Jun 2009
    Location
    On the coast in s. e. Ga.
    Posts
    8
    Quote Originally Posted by itsiceman View Post
    Q I would use an OEM valve too but honestly you like how those valves work
    Less failures than the Alcos but
    With out a doubt the Sporlans they used to use worked better at metering refrigerant IMO
    I love the danfoss on any refrigeration. I won't put on an alco if I can get a danfoss. If you have to adjust it, it's instant when you do. No having to wait to see where it's going to go after a quarter turn and 30 minutes to level out.

  10. #10
    Join Date
    Feb 2008
    Posts
    96
    The Danfoss expansion valve, and I have to give credit to Manitowoc, is THE BEST valve I have ever used. Currently, we are running into all brands of TXV's failing. I don't know what Sporlan has done, but they have taken a fantastic valve and have made it the worst TXV I have ever seen. Alco would be my choice over a Sporlan. That's hard to say coming from a die hard Sporlan guy. If there are failures on Danfoss TXV's, I will guarantee it is because of improper brazing techniques. It is a difficult valve to install......read the directions and you will not have any issues with this valve and we have changed over 100 of them in the past few years with maybe one failure.

  11. #11
    Join Date
    Feb 2008
    Posts
    96
    Quote Originally Posted by itsiceman View Post
    Q I would use an OEM valve too but honestly you like how those valves work
    Less failures than the Alcos but
    With out a doubt the Sporlans they used to use worked better at metering refrigerant IMO

    Yep, sure do.....my first choice and the best TXV on the market if installed correctly.

  12. #12
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,665
    Guess it's me
    I don't change any but don't like the way the meter either

  13. #13
    Join Date
    Apr 2001
    Posts
    669
    Quote Originally Posted by QTEMP View Post
    Yep, sure do.....my first choice and the best TXV on the market if installed correctly.
    Qtip,
    Danfoss has ALWAYS made the best "fractional tonnage" TXV in the industry. However, someday you might get a chance to work beyond fractional tonnage, and then you'd want to be a real Sporlan Guy. We both know Manitowoc uses the best (Danfoss), but what's Ice-O-Matic using as a TXV?


    Photo courtesy of esornivram

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