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SYSTEM FLUSH - SYSTEM FLUSH -
SYSTEM FLUSH - SYSTEM FLUSH -
SYSTEM FLUSH - Flushing of the system
is required whenever there has been a low
side leak, plugged capillary tube or com-
pressor replacement. This is a procedure
in which R134A refrigerant is flushed
through the system and into the recovery
system to remove moisture and non-
condensables which may have entered the
open system. The compressor must be
isolated during the flush procedure, in or-
der to prevent contaminants from being ab-
sorbed into the ester oil, resulting in a con-
taminated system.
The system flush procedure will be done
in two parts. First, the condenser, including
the yoder loop, will be isolated by means
of process tube adapters and flushed with
4 ounces of R134A. After the drier has been
replaced, the entire sealed system, minus
the compressor, will also be flushed with 4
ounces of the refrigerant. This second step
can take about 15 minutes in order to circu-
late the refrigerant through the condenser,
the drier, the capillary tube, the evaporator
and out the suction line into the recovery
equipment. During this 15 minutes, the old
compressor can be removed and the re-
placement set into place, mounted and pre-
pared electrically. The compressor is to-
tally installed except for the final brazing of
the suction and discharge lines.
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