20
2090-0217 Rev 6
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.
R-410A Recovery – Special Notes
R-410A is a replacement refrigerant for R-22. Its physical properties, however,
are much different than R-22. R-410A has a higher vapor pressure and is more
dense than R-22. These characteristics make recovering R-410A more difficult
by putting more of a load on the compressor. Please follow the instructions below
to ensure trouble-free R-410A recovery.
NOTE:
Hose connections are the same for recovering R-410A. Connect hoses
as shown in the vapor recovery diagram below.
Under normal operating conditions the STINGER can recover R-410A just like
R-22. Under certain conditions, however, because of R-410A’s higher vapor
pressure and density, you will have to take the following precautions:
CAUTION:
USE ONLY DOT RECOVERY CYLINDERS APPROVED
FOR USE WITH R-410A. Overfilling or over-pressurizing your recovery
cylinder is extremely dangerous
.
WHEN RECOVERING VAPOR:
If the STINGER sounds like it is overloaded
either by slowing down or by making a “knocking” sound, reduce the inlet
pressure by closing or “throttling” the inlet valve until the STINGER begins to run
normally.
WHEN RECOVERING LIQUID:
If a loud knocking noise occurs, the inlet
pressure on the STINGER should be throttled back by slowly closing the inlet
valve until the knocking noise stops. This action will prevent compressor
damage.
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...
