keep discharging for 3-5min.
Remove the refrigerant discharging tube
from the pressure gauge and use the
connector of the vacuum pump to exhaust
gas to the outside.
Turn on the vacuum pump for at least 10
minutes.
Remove the needle valve from the
process pipe and cut off the parts that
need to be replaced. If it is unnecessary
to replace the compressor, cut the
process pipe flat.
Generally, the dry filter should be
replaced with the parts, especially for
equipment using the capillary throttle.
Purge the system pipeline with nitrogen
for more than 10 seconds.
REPLACEMENT OF PARTS
STEP
PRECAUTION
Welded parts are to be placed on their
original positions in the system.
REMEMBER: Some parts of the R290
system must be explosion resistant.
Please use the original accessories.
Weld the new extension pipe to the
original process pipe. If the compressor is
replaced, weld it onto the new
compressor.
The process pipe is required to be long
enough for the next service.
Press and weld the process pipe tightly.
VACUUMING
STEP
PRECAUTION
Mount the needle valve on the process
pipe and connect the vacuum pump
through the pressure gauge.
Vacuum the refrigeration system for more
than 30 minutes and make sure the
pressure decreases to 50Pa or lower.
The best practice to test low pressure is
using a vacuum gauge.
Close the low pressure valve of the
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