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There's a lot of BS about compatibility issues between R22 and R134, and obviously you don't want to mix them, but a good long vacuum will leech the remaining old refrigerant out of the oil in the system. Once, like a dumbass, I punctured the line on a window AC unit I was cleaning. It used R22. I had some R22, but I didn't feel like hooking it up to the machine. So I researched this stuff, and then just charged the thing with R134. Still going strong 3 years later. Although, I should mention, aren't vending machine refrigeration systems sealed systems? You know, like modern postwar refrigerators? They almost never leak (not even after 40 years) unless they've been damaged. If they are sealed, any performance issues are most likely gonna be either a filthy condenser or a just-plain-worn-out compressor. Or maybe a fan or something. But yeah, R134 or propane. Or just buy some R22 somewhere else. (It's a little pricey though.) Last edited by MadMan; 01-21-2017 at 01:12 AM. |
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