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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.