How to Pull Vacuum on Mini Split: A Comprehensive Guide
To pull a vacuum on a mini split, you must first attach your vacuum pump to the suction line of the system and open the valve on the refrigerant manifold. Next, open the low side valve on the vacuum pump and turn on the pump, letting it run until it reaches a vacuum of 500 microns or less. Then, close the low side valve on the vacuum pump, turn off the pump, and wait for the vacuum to stabilize. Finally, close the valve on the refrigerant manifold and disconnect the vacuum pump.