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  1. #27
    Join Date
    Feb 2013
    Location
    Australia, NSW
    Posts
    5
    Post Likes
    Hi guys and girls,
    long time browser, first time post (just signed up)

    I dont do alot on ice makers down here, but as for hydrocarbons, here in oz thats the way they are pushing us! there only flamable between 2.5%-10% concentration, in saying that if there is no ignition protection on any of the parts its a no no!

    not sure what gasses you have in the states, were still using SP34E and R406A for 12 "drop ins"

    on such an old machine, avoid HC's.

    >Muz

  2. #28
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    7,681
    Post Likes
    Manitowoc is coming out with HC
    Would agree and wouldn't consider it as a drop in. You'll get blamed for something even if it isn't your fault!
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  3. #29
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,570
    Post Likes
    Quote Originally Posted by itsiceman View Post
    Manitowoc is coming out with HC
    It looks like they've been testing R290 (Propane): http://www.danfoss.com/BusinessAreas...Ice+Makers.htm

  4. #30
    Join Date
    Feb 2008
    Posts
    96
    Post Likes
    HP81 was a replacement for R502 0n Manitowoc Ice Machines. It worked fantastic and at the time of development was huge secret. I have converted out of warranty Hoshizaki's from R502 to HP81, along with isolating the discharge line in harvest with a check valve and have seen huge improvements of operation on a KM cuber. This refrigerant was a great replacement, one of the best. Although it has been debated as to using it in other refrigeration equipment, I have never had an issue using it.

  5. #31
    Join Date
    Feb 2008
    Posts
    96
    Post Likes
    I remember Manitowowc had many problems with their TXV's. The part number 76-2109-3 will for ever be engrained into my memory. They switched to Danfoss which i think is a superior TXV compared to any valve on the market today......if you can braze correctly.

  6. #32
    Join Date
    Jan 2013
    Posts
    7
    Post Likes
    Bringing back an old thread!! I got a full 30lb canister if r-12 off some kid for $100 because he did not know what it was.. Anyway.. Charged up the machine and the head pressure will rise but the suction stays in a vacuum. So now its time to change the TXV..

  7. #33
    Join Date
    Oct 2009
    Location
    Raleigh, NC
    Posts
    820
    Post Likes
    I figured you had a bad TXV. $100 for 30lbs of R12 isn't too bad. It isn't worth much anymore, contrary to what many believe.

  8. #34
    Join Date
    May 2013
    Posts
    47
    Post Likes
    What about MP39?

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