Evacuating And Recharging; Equipment Needed For Evacuation & Recharging; Installing Evacuation And Recharging Equipment - Electrolux FROST- FREE Service Manual

4. Connect a pressure gauge and access valve to the
discharge tube and pressurize to 250 lbs. using dry
nitrogen or carbon dioxide.
Never pressurize with oxygen.
Never open a high pressure tank
unless it is equipped with a
pressure regulator. Never put high
pressure on the dome of the
compressor. Make sure the gauge
and fitting is in good condition and
do not leak.
5. Leave the pressure on the condenser for 24 hours.
Any drop in pressure is an indication of a leak.

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. 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 ul
timately restrict the cap tube in an
R-134a system.
Equipment Needed For Evacuation &
Recharging:
• Heated charging cylinder.
• Standard 3-port manifold gauge set:
4 charging hoses.
Tee fitting with valve core stem removed.
(Robinair No. 40396).
Hand shut-off valve (Robinair No.40380).
• Two stage vacuum pump.
• Process tube adapter kit (Robinair No. 12458).
• Tubing cutter.
• Pinch-off tool capable of making leak proof seal.
• Complete brazing torch set.
• Small 3-corner file.
• Grit cloth or Scotch-Brite.
• 45% silver solder and flux.
Installing Evacuation and Recharging
Equipment:
1. Disconnect freezer from electrical supply.
2. If compressor was replaced, install correct sized
process tube adaptor on process tube. If
compressor was not replaced, cut process tube with
tubing cutter leaving as much tube as possible and
install correct size process tube adaptor.
3. Install correct sized process tube adaptor on
high-side process tube.
4. Attach refrigeration service gauge manifold to
system in following order:
• Low-side (compound gauge) hose to suction side
process tube adaptor.
• High-side (pressure gauge) hose to high-side
process tube adaptor.
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