Electrolux R134A - Evaporator, Heat Exchanger, and Compressor; SYSTEM FLUSH

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EvaporatorEvaporator
EvaporatorEvaporator
Evaporator
The evaporator is a long aluminum tube
folded or coiled within the freezer compart-
ment. If a leak is present in the evaporator,
it is not repairable and must be replaced.
On R134A systems, whenever the evapo-
rator is replaced, the heat exchanger must
also be replaced as well as the compres-
sor. The replacement evaporator will come
with the heat exchanger attached. Leave the
caps in place on the opposite end of the heat
exchanger. Again, whenever the evapora-
tor and heat exchanger are replaced on
R134A units,
the compressor must also bethe compressor must also be
the compressor must also bethe compressor must also be
the compressor must also be
replaced replaced
replaced replaced
replaced and the sealed system flushed. Do
not connect the suction line to the replace-
ment compressor until the system has been
flushed
(see System(see System
(see System(see System
(see System
Flush Procedure)Flush Procedure)
Flush Procedure)Flush Procedure)
Flush Procedure).
After mounting the evaporator in place, con-
nect the capillary tube of the heat exchanger
to the replacement drier.
Heat ExchangerHeat Exchanger
Heat ExchangerHeat Exchanger
Heat Exchanger
The heat exchanger is composed of the cap-
illary tube and suction line soldered to-
gether. The heat exchanger should be re-
placed if there is a non-repairable leak,
plugged capillary, more than 3 inches have
been removed from the capillary or the cap-
illary tube separates from the suction line.
If the heat exchanger is replaced, the evapo-
rator must also be replaced as well as the
compressor.
CompressorCompressor
CompressorCompressor
Compressor
The compressor is the "heart" of the refrig-
erator, consisting of an electrical motor and
a "pump" sealed inside a steel case. The
compressor used on R134A refrigerant sys-
tems is virtually the same in external ap-
pearance as the compressor used with R12
refrigerants. However, due to changes in
lubricants and other internal differences, the
compressors are
notnot
notnot
not to be interchanged,
otherwise system failure will result. Diag-
nostic procedures will be the same as with
the R12 refrigerant systems, except that the
high side pressure will be slightly higher and
the low side pressure will be slightly lower.
If a new compressor is to be installed, pull
one of the plugs to ensure that it is prop-
erly pressurized. If no pressure is observed,
do not use the compressor. If unit is pres-
surized, reinstall the plug and keep the com-
pressor sealed until it is installed and ready
for solder connections. Whenever the com-
pressor is replaced on a R134A refrigera-
tor, the sealed system must be flushed
(see(see
(see(see
(see
System Flush Procedure).System Flush Procedure).
System Flush Procedure).System Flush Procedure).
System Flush Procedure).
Before accessing the sealed system, it is
necessary to determine that the problem
is actually a sealed system problem by
utilizing a wattmeter, thermometer, visual
and touch indicators. Once it has been
determined that the problem is in the
sealed system, and diagnosis indicates a
low side leak, plugged capillary tube, or a
defective compressor, in addition to the
normal repair, the system must be flushed
and the compressor
mustmust
mustmust
must be replaced.
SYSTEM FLUSHSYSTEM FLUSH
SYSTEM FLUSHSYSTEM FLUSH
SYSTEM FLUSH