Refrigerant PumpDown Method Quality HVAC Refrigeration 101
The Refrigerant PumpDown Method. Yes, this is in fact, true and it's called the refrigerant pumpdown method. Whenever a new condensing unit is purchased it is precharged at the factory with refrigerant. Most are precharged for a line set up to 25 feet. The refrigerant is released by opening two valves, one for the liquid line (liquid line ...