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Charging Oil with Freeze 12 Combination Can

kurf on Thu June 12, 2008 10:06 AM User is offline

Year: 93
Make: Geo
Model: Prizm
Refrigerant Type: Freeze 12

Hi Folks, new member with basic question. Freeze 12 sells a can that is a gas, oil mixture that allows adding oil without opening up the system. I would expect to add this to the low side. Can the compressor accept oil on the low side without damage? If it can, why not liquid Freeze 12? A compressor is not supposed to compress liquids. I read another post saying that freeze 12 should be put in as a liquid, is that so? If so how? Your comments please. Thanks


mk378 on Thu June 12, 2008 10:14 AM User is offline

Charging refrigerant or oil into the low side with the compressor running, open the valve only slightly so any liquids will hit the compressor as a mist rather than slugs of pure liquid.

Freeze-12 is 80% R-134a with another ingredient to push the mineral oil around. If you change the oil in the system you can use plain R-134a instead.

Freeze-12 is a mixture two chemicals with different boiling points. When charged as a gas it boils in the can and one part, being more prone to boil, goes in first leaving the other part behind. If you use the whole can that is not a problem because everything does come out eventually. If you're going to use part of a can or draw from a large tank, it must be charged as liquid.

Edited: Thu June 12, 2008 at 10:15 AM by mk378

bearing01 on Thu June 12, 2008 10:59 AM User is offline

I would be weary about adding a refrigerant containing oil to a system that already has oil in it. Too much oil and the system won't cool well.

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