I have a question concerning the proper evacuation of a refrigeration system before charging. We are an OEM of commercial bar equipment using R-134a compressors ranging from 1/4 to 1 horsepower.
We are trying to define our refrigeration process. Currently we pre-evacuate for 15 minutes to about 500 microns. Then each system is hooked up to a Galileo charge board until it is pulled to 30 microns before charging.