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Section E
Vacuum Pump Maintenance
It is absolutely essential to maintain your vacuum pump according to the
manufacturer’s instructions including required oil changes at the recommended
intervals. Vacuum pump oil should always be changed after evacuating a
contaminated system. Vacuum pump performance should be checked periodically
with a micron gauge.
Vacuum pump suppliers may or may not recommend changing the vacuum pump
oil to the same type that’s in the system being evacuated. Some manufacturers
may recommend a vacuum pump that’s dedicated to R-134a systems.
Robinair has stated that their current and discontinued vacuum pump models,
using mineral oil currently specified for use in their vacuum pumps, can be used to
evacuate R-134a/Ester oil systems. Robinair also states that it is acceptable to
alternate between evacuating R-12/mineral oil and R-134a/Ester oil systems
without adversely effecting the vacuum pump’s performance.
For other brands of vacuum pumps, check with the manufacturer for restrictions
and guidelines when using with R-134a.
CAUTION
If you use a vacuum pump with
mineral oil to evacuate an R-134a
system, it is ABSOLUTELY
ESSENTIAL to have a shut-off valve
between pump and your manifold
gauge set as shown in Figure E4.
The hand valve must be closed
during all times when vacuum
pump is not operating. This will
prevent migration of mineral oil
vapor into R134a/Ester oil system. If
vacuum pump should stop during
evacuation for any reason, the hand
pump shut-off valve must be closed
immediately.
2 STAGE VACUUM
PUMP
Evacuating and Recharging Connections
Figure E4
HEATED
CHARGING
CYLINDER
GAGE
MANIFOLD
PRESSURE
GAUGE
COMPOUND
GAUGE
HAND
SHUTOFF
VALVE
TEE
FITTING
EVAPORATOR
CONDENSER
COMPRESSOR
FILTER
DRIER
PROCESS TUBE
ADAPTERS
Summary of Contents for Side by Side Refrigerator
Page 1: ...5995393583 0311 Dishwasher Service Manual Side by Side Refrigerator ...
Page 39: ...32 Section C Diagrams Diagram A Control System ...
Page 41: ...34 SectionC WiringDiagrams ...
Page 42: ...35 Section C Wiring Diagrams ...
Page 55: ...THIS IS A BLANK PAGE ...
Page 112: ...105 Section F Ice Maker ...
Page 113: ......
Page 129: ...THIS PAGE IS BLANK ...
Page 132: ...125 Section H Water System Figure H6 Rear Filter System Front Filter System Figure H5 ...