Evacuating And Recharging - Electrolux Side by Side Refrigerator Service Manual

Section E- Refrigeration System

EVACUATING AND RECHARGING

CAUTION
Check the serial plate for the correct refrigerant type. It is extremely important to verify the
type of refrigerant in the system before starting any sealed system repairs.
CAUTION
With the possible exception of the vacuum pump, all service equipment that comes in
contact with R-134a during evacuation and recharging must be dedicated. Accordingly,
R-134a will require a dedicated charging cylinder, manifold gauge set, process tube
adaptors, and hoses. Any residual mineral oil on other tools (tubing cutter, etc.) must be
thoroughly cleaned off before using on R-134a/Ester oil systems. It will be necessary to
check with the manufacturer of your vacuum pump for refrigerant and oil compatibility
issues.
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 the pump and your
manifold gauge set as shown on page 32, Figure E2. The hand valve must be closed
during all times when the vacuum pump is not operating. This will prevent the
migration of mineral oil vapor into the R134a/Ester oil system. If the vacuum pump
should stop during evacuation for any reason, the hand pump shut-off valve must be
closed immediately.
CAUTION
Insure that your refrigeration hoses are specified for use with R-134a refrigerant.
Research has shown that compounds in standard refrigeration hoses may enter sealed
systems and ultimately restrict the cap tube in an R-134a system.
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