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What about MP39?
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.
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..
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.
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.
Originally Posted by itsiceman Manitowoc is coming out with HC It looks like they've been testing R290 (Propane): http://www.danfoss.com/BusinessAreas...Ice+Makers.htm
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!
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
Originally Posted by MechanicallyInclined Who still has original R-502 Ice Machines?! I've got one. I recently replaced a txv in a Hoshi at the national headquarters of a nationwide retailer. Put fresh 502 back in it.
Who still has original R-502 Ice Machines?!
HP81 replaced 502 in Manitowoc ice machines. Dupont MP39 for R12 AND CHANGE txv
Originally Posted by MicahWes 15 inch vacuum on evap? Doesn't anyone think that he has a TXV problem first and foremost? It probably has a full charge. Manitowoc machines from that era used Alco TXV's with steel powerheads...which were notorious for rusting through and causing a dead valve. The replacement valves had stainless steel powerheads.
Originally Posted by icemeister HP81 (R402B) is in a 13 lb cylinder and its ASHRAE designated color is Green-Brown/Olive. Your right, I'm wrong
HP81 (R402B) is in a 13 lb cylinder and its ASHRAE designated color is Green-Brown/Olive.
15 inch vacuum on evap? Doesn't anyone think that he has a TXV problem first and foremost? It probably has a full charge.
HP 80 was in the small green can
I have a can of that expensive:banghead: Sent from my SGH-T999 using Tapatalk 2
Wasnt that HP80 in a small green can ? or was it HP81 ? I think HP 81 was 404a.....
R409a is another R12 replacement.
Originally Posted by itsiceman Yep thats what it was and "Failure to install new TXV will result in compressor failure" http://www.manitowocice.com/docs/upl...ns/8009663.pdf Yep, Have every book. And I just remembered that one. Options options options.... Way too many damn refrigerants out there...
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