Unit has no charge.............Old R12 system.........A lot of work to convert to a newer refrigerant.........Plus with all of the grease , I probably burn the place down..........Do not know if Hot-Shot is the way to go......I am leaning towards Choice R420A, but my parts house has not heard of it....Suppose to have the same P/T relationship, plus use the same oil.............I already have the Hot-Shot on hand........Anyone else use R420A ????.
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True TSSU-60-16 prep table
Started by certified tech group 51, Feb 12 2013 10:53 AM
5 replies to this topic
#1
certified tech group 51
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Posted 12 February 2013 - 10:53 AM
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#2
KurtiusInterupptus
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Posted 12 February 2013 - 11:09 AM
I have used 420a as a drop in for 12 for a few years...always worked great for me...approx. 10% less than rated charge, if memory serves...
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#3
jumptrout
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Posted 12 February 2013 - 02:37 PM
HotShot is fine.
Since you have it on hand,use it.
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#4
Cactus Bob
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Kohai
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Posted 12 February 2013 - 08:06 PM
409A is another drop in replacement
Hot shot will work
True stopped using R12 in 1993-4 , so this unit is at least 19 years old
don't get married to it
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#5
dimitri77565
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Posted 12 February 2013 - 11:27 PM
I use hot shot for Old & new R12 Or R134 also hot shot seems to clean small restrictions, after charging add a "Leak Sealer"
unless u have a GE with the rusted return line witch normally u must replace due to the size of the HOLE (LOL). Have used them for the last 2 years with %100 success.
There are 2 types 1 is delivered by the oil in the system the other witch I prefer is delivered by the freon. Many brands most are the same.
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#6
certified tech group 51
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Posted 14 February 2013 - 11:01 PM
Went to look for a jug of what i thought was R409 but it turns out to be Suva MP 39 ( R 401A)........I think I will use the MP39.......... been there about 6 years , forgot about it....................This is what happens when the warehouse/shop has a lot of 'stuff' in it.. 
............Thanks for the help.......
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