User manual

15
ENGLISH
a Factory refrigerant charge of the product: see unit name plate.
b Additional refrigerant amount charged in the eld. (Refer to the above information for the quantity of
refrigerant replenishment.)
c Total refrigerant charge.
d Refrigerant cylinder and manifold for charging.
NOTE
t The lled-out label must be adhered in the proximity of the product charging port.
(ex. onto the inside of the stop valve cover.)
t The F-GAS label must be adhered in the proximity of the product.
CAUTION
Tools used for refrigerant pipe installation
Product using R-410A/R-134a refrigerant requires exclusive tools. Check the conventional tools for compatibility before
installation.
Tool Work Compatibility with conventional tool
Pipe cutter
Refrigerant pipe
work
Pipe cutting
Compatible
Flaring tool Pipe aring
Refrigerating machine
oil
Apply refrigerant oil on
ared part
Use exclusive ether oil, ester oil, alkali benzene oil or
mixture of these oils
Torque wrench Connect are nut with pipe
Compatible
Pipe bender Pipe bending
Nitrogen gas
Air tightness test
Inhibition of oxidation
Welder Pipe welding
Manifold gauge
Air tightness
test ~ additional
refrigerant
charging
Vacuuming, charging and
checking operation
Need exclusive one to prevent mixture of R-22
refrigerant oil use and also the measurement is not
available due to the high pressure.
Refrigerant charging
hose
Need exclusive one due to the refrigerant leakage or
inow of impurities.
Vacuum pump Vacuum drying
Compatible (Use products which contains the check valve to prevent the oil from
owing backward into the outdoor unit.)
Use the one that can be vacuumed up to 100.7 kPa (5 Torr).
Scale for refrigerant
charging
Compatible
Gas leak detector Gas leak test
Need exclusive one
(Ones used for R-134a is compatible)
Flare nut
Must use the are nut equipped with the product.
Refrigerant leakage may occur when the conventional are nut for R-22 is used.