Liquid-Pull Recovery / Charging Method - Bacharach High Performance Oilless Commercial Refrigerant Recovery Unit User Manual

High performance oilless commercial refrigerant recovery unit
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Liquid-Pull Recovery / Charging Method

Do not pump virgin refrigerant with the STINGER. Unlike recovered
refrigerant, virgin refrigerant does not contain oil. Pumping virgin
refrigerant through the STINGER will remove all lubrication from the
compressor bearings, resulting in premature bearing failure. Use the
liquid push-pull method or the liquid-pull method to transfer large
amounts of liquid refrigerant (virgin or dirty).
The liquid-pull method is used to move a large amount of liquid refrigerant without the
refrigerant passing directly through the STINGER. The virgin refrigerant is pulled directly into
the system being charged. The STINGER keeps the pressure low in the system by removing
vapor. For every pound of vapor removed, as much as 25 pounds of liquid refrigerant may be
transferred. This method can be used for either virgin refrigerant or really dirty refrigerant.
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