What is the pressure for the Air Conditioner compressor when you charge it? on 2007 Ford Explorer Sport Trac

Need to know at what pressure I charge the Air Conditioner compressor to.

Asked by for the 2007 Ford Explorer Sport Trac
if you dont know take it to a shop u not only need to worry about low but also high pressure side as well. also a shop will pull the old freon out and add oil to your system if not done right your looking at a costly repair to try and save a few bucks right ty not worth the risk