I have r 22 and a set of gauges. how do i charge my a/c which is charged by subcooling?

hvac

I have r 22 and a set of gauges. how do i charge my a/c which is charged by subcooling?
Rich (previous answer) must not be licensed or he would have told you that this is not a DIY job. Should you get caught doing the work without a license, the EPA fines start at $10,000. The equipment to evacuate the system and capture the old freon is also very expensive.
Reply:It is too much to explain here but you can find a guide at my source.