How to Use an AC Vacuum Pump: A Comprehensive Guide
First, connect the vacuum pump to the refrigerant tank using a hose. Next, attach the vacuum gauge to the low-pressure side of the air conditioning system. Turn on the pump and allow it to run until the pressure on the gauge reads at least 29 inches of mercury. Close the valve on the low-pressure side and let the vacuum pump continue to run for another 15-20 minutes to remove any remaining moisture and contaminants from the system. Finally, turn off the vacuum pump and close all valves before disconnecting it from the refrigerant tank and air conditioning system.