Abstract: A liquid refrigerant transfer system includes a low-pressure liquid refrigerant pump coupled by drain hoses between a refrigeration system liquid refrigerant service or drain fitting and a liquid refrigerant storage tank. Another hose couples the refrigerant storage tank with a vapor refrigerant service or fill fitting of the refrigeration system. Preferably, a quick disconnect coupling is provided at least between the drain hose and the refrigerant storage tank to facilitate the removal of the filled tank and the substitution of a second, empty tank to continue the transfer. The vent hose carries liquid refrigerant vapor and any liquid refrigerant overflow back into the refrigeration system, thereby permitting substantially unattended use of the system. The system can be used to transfer liquid refrigerant back from the storage tank back into the refrigeration system through the drain opening.

Abstract: A refrigerant reclamation system for a refrigeration system having a refrigerant therein. The system includes a pump for removing refrigerant from the refrigeration system. The pump is driven by a pneumatic motor. The pump has a first mode of operation for removing refrigerant in a substantially liquid phase and a second mode of operation for removing refrigerant in a substantially gaseous phase. A refrigerant heat exchanger for cooling refrigerant passing therethrough is in fluid communication with the pump. A refrigerant recovery container is connected to the heat exchanger for receiving the cool refrigerant therefrom. A compressed gas drives the pneumatic motor so that the pump removes refrigerant from the refrigeration system and is passed through the heat exchanger.