quantity of refrigerant in a domestic refrigerator?

[mebluna]

How can i determine the quantity of refrigerant i need for a specific refrigerator. I have been change the R134a for a mix of HC. I have been use the 45 and 50% of the HC refrigerant but it is haven´t been working like i expect.

Thanks!

Mariel

[Brian_UK]

How much R134a did you remove ?

What is the maximum allowed by the compressor manufacturer?

[The Viking]

I assume you are doing this as some sort of experiment?

The best option would be to braze in a service port on the HP/liquid line and measure the sub cooling.

Coming to think of it, a sight glass on the liquid line would do the job.