5. REFRIGERANT PIPING WORK
DANGER:
Use refrigerant R410A in the refrigerant cycle. Do
not charge oxygen, acetylene or other ammable
and poisonous gases into the refrigerant cycle when
performing a leakage test or an air-tight test. These
types of gases are extremely dangerous and can cause
an explosion. It is recommended that compressed air,
nitrogen or refrigerant be used for these types of tests.
5.1. PIPING MATERIALS
CAUTION
Cover the end of the pipe if the pipe has to be inserted
through a hole.
Do not put pipes on the ground directly without a cap or
vinyl tape at the end of the pipe.
Remove all the ammable materials around the units. If
not, it will cause a re.
5.2. CAUTIONS FOR PIPING CONNECTION WORK
NOTE:
Pipe Size Tightening Torque
CAUTION
Do not apply excessive force to the are nut when
tightening. If applied, the are nut may crack due to aged
deterioration and refrigerant leakage may occur. Use the
specied tightening torque.
For more details of the refrigerant piping work, vacuum
pumping and refrigerant charge, refer to Technical Catalog
for Outdoor Unit.
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