Standard Recovery Hose Connections - Stinger Refrigerant Recovery Unit User Manual

5. Slowly open the inlet valve until the Stinger's compressor turns on. Continue
to slowly regulate the inlet valve to the full open position.
WARNING: If the compressor begins to "knock," regulate the inlet
valve toward the closed position until the knocking stops. Failure
to do so could void the compressor's warranty.
6. Proceed with the recovery process until the system pressure shows a
vacuum. Turn OFF the STINGER for a minimum of 5 minutes; after which,
determine the amount of refrigerant remaining in the system. Repeat this
step until system pressure is below mandatory EPA levels.
7. Purge the STINGER as follows:
a. Turn OFF the STINGER.
b. Turn the inlet and purge valves to their "PURGE" position (both pointing
DOWN), and the outlet valve to its "OPEN" position (pointing UP).
c. Turn ON the STINGER and monitor the inlet gauge. The purge
operation is complete when the inlet pressure gauge shows a vacuum.

Standard Recovery Hose Connections

IMPORTANT NOTES FOR LIQUID RECOVERY
The Stinger can be used for pumping virgin refrigerant on an intermittent
Unlike recovered refrigerant, virgin refrigerant does not contain oil.
CAUTION: Routinely pumping virgin refrigerant through the STINGER
can remove lubrication from the compressor, resulting in premature
failure. Use the liquid push-pull method or the liquid-pull method to
transfer large amounts of liquid refrigerant (virgin or dirty).
ATTENTION: You must use an agency-approved in-line filter when
recovering liquid.
recovery cylinders) can enter the STINGER and become lodged in the
valve seats causing damage and resulting in leaks. We recommend
using Bacharach in-line filter P/N 07-1700 to guarantee optimum
pumping speed.
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Contaminants (particularly from the bottom of
basis.
2090-0217 Rev 6