They use R-22. I haven't found a capacity on them, but I can give you my gauge readings at ambient.
At 100 degrees ambient, yeah I know it's hot in Fort Worth right now, I run about 85 to 90 lbs suction pressure, and the units blow air right around 64 degrees.
Hope that helps you check them.
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Richard Rhonda Ty and Alex Entrekin
1995 Newell # 390 DD Series 60, Allison World Trans
Subaru Outback toad
CoMotion Tandem
Often wrong, but seldom in doubt
Rhonda's chronicle https://wersquared.wordpress.com/
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