Compressor Oil for Household Refrigerator

[MIPAR]

I would like to know what would be the implications for the following:
I removed a compressor from a R-134a household refrigerator and replaced it with a used one, but before installing it I noticed it had just a little bit of oil and somebody advised to add vacuum pump oil and I did. Now I remember that I did read in a book in the past that the pump oil is mineral oil and the oil for HFC in this case R-134a is synthetic oil and also that mineral and synthetic oils are not compatible, but unfortunately I remembered this after the fact. Can anybody tell me what can happen to the refrigerator if I leave it like that? Is there any solution to this?

[Phase Loss]

oil logging in evap reducing heat transfer.

[ammoniadog]

My guess is you will be shopping for a new refrigerator soon.

[MIPAR]

Hello Phase Loss: I am thinking about installing another R-134a compressor tomorrow morning, but this time I will not add any mineral oil. Is there anything I can do prior to installing the compressor? Is there any way to remove the oil from the system before installing the other compressor? If I install it with the system as is will it have any oil-related issues or heat transfer issues later on? I am trying not only to save money, but mainly to save the refrigerator because it is a very nice spacious stainless steel refrigerator. Thank you very much in advance for your advice.

[powell]

Hello Phase Loss: I am thinking about installing another R-134a compressor tomorrow morning, but this time I will not add any mineral oil. Is there anything I can do prior to installing the compressor? Is there any way to remove the oil from the system before installing the other compressor? If I install it with the system as is will it have any oil-related issues or heat transfer issues later on? I am trying not only to save money, but mainly to save the refrigerator because it is a very nice spacious stainless steel refrigerator. Thank you very much in advance for your advice.

You could try Rx11-flush

http://www.nucalgon.com/products/tot..._rx11flush.htm

[rayr]

We have a ton of close coupled refrigeration units with 134 and mineral oil in them. Work just fine for years. Not saying it is right, just saying.

[Phase Loss]

We have a ton of close coupled refrigeration units with 134 and mineral oil in them. Work just fine for years. Not saying it is right, just saying.

Wonder if it's only a real issue on larger systems that have to return oil vertically and across many of feet of suction line.

Smaller systems that only have a few feet of suction line probably have enough velocity to push the oil along without being miscible with the refrigerant.