Converted system to R134 (not that cold)

Mudinford · 08-19-2001, 03:26 PM

COnverting a r-12 system to 134-a is hell on the seals and equipment. 134-A runs at a much higher pressure than R-12. This in turn will edventually eat your R-12 componets up. R-12 oil will not mix with 134-a oil. You needed to flush out the old oil out of the system before you vaccumed it. The vaccum is only designed to take out the air only. What i would do it recover the system and open it back up and flush out the compresser, evaporater, condenser, and lines. Their is no great way to do it but brake cleaner and compressed air work fairly well. Then get some PAG oil and find out how much your system takes empty and fill the compressor (unless you have a sealed compressor--has an oil slump) partly and then shoot the rest in with the 134-A. If you have too much oil that will make it stop cooling as well. The oil will coat the evaporater and will not allow the heat exchange. try that and see where that gets you. BUT if i were you...i woudl have just left it R-12. AND dont use that Freeze 12 crap....caused hell at our shop....contaminate's our freon.....

Dan

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08-19-2001, 03:26 PM	#8
Mudinford Registered Member Join Date: Aug 2001 Location: Dallas, Texas Posts: 10	COnverting a r-12 system to 134-a is hell on the seals and equipment. 134-A runs at a much higher pressure than R-12. This in turn will edventually eat your R-12 componets up. R-12 oil will not mix with 134-a oil. You needed to flush out the old oil out of the system before you vaccumed it. The vaccum is only designed to take out the air only. What i would do it recover the system and open it back up and flush out the compresser, evaporater, condenser, and lines. Their is no great way to do it but brake cleaner and compressed air work fairly well. Then get some PAG oil and find out how much your system takes empty and fill the compressor (unless you have a sealed compressor--has an oil slump) partly and then shoot the rest in with the 134-A. If you have too much oil that will make it stop cooling as well. The oil will coat the evaporater and will not allow the heat exchange. try that and see where that gets you. BUT if i were you...i woudl have just left it R-12. AND dont use that Freeze 12 crap....caused hell at our shop....contaminate's our freon..... Dan