22
2090-0217 Rev 6
Purging the STINGER
The STINGER is equipped with a pump-down purge valve that allows the
technician to pump down or evacuate the STINGER before proceeding to the
next recovery operation. This procedure not only eliminates cross contamination,
but also conserves refrigerant. Follow the steps below to ensure your pump-
down operation is performed correctly.
During the purge operation the entire STINGER is pulled into a vacuum, leaving
no more than 0.1 ounce of refrigerant in the unit.
STEPS
1. After recovery operations are complete, and with the unit still p
owered ON
and
running
, make the following control valve position changes (refer to
illustration below):
x
Turn the inlet valve (
blue knob left side
)
slowly
to the “PURGE”
position (pointer DOWN position).
x
Turn the purge valve (
black knob center
)
slowly
to the “PURGE”
position (pointer DOWN position).
2. The STINGER will now start purging itself of refrigerant. Allow the unit to run
until the inlet gauge indicates that there is an adequate vacuum present in
the system.
3. Turn OFF the STINGER and then turn the outlet valve (
red knob right side
) to
its “CLOSED” position.
4. Close
the
Vapor
and
Liquid
valves on the DOT recovery tank.
5. Remove
all
hoses.
Summary of Contents for Refrigerant Recovery Unit
Page 9: ...2090 0217 Rev 6 9 Descriptions of Features Figure 1 Stinger Front View...
Page 15: ...2090 0217 Rev 6 15 Figure 3 Standard Recovery Hose Connections...
Page 18: ...18 2090 0217 Rev 6 Figure 4 Liquid Push Pull Recovery Operation...
Page 21: ...2090 0217 Rev 6 21 Figure 6 Special Notes for R410 A Recovery...
Page 26: ...26 2090 0217 Rev 6 Figure 8 Recovery Tips...
Page 30: ...30 2090 0217 Rev 6 Schematic Diagram Figure 9 Schematic Diagram...
Page 32: ...32 2090 0217 Rev 6 Figure 10 Stinger Exploded View...
Page 34: ...34 2090 0217 Rev 6 Figure 11 Compressor Exploded View...
