30-EN
29-EN
– 15 –
Heat insulation process
Apply heat insulation for the pipes separately at liquid
side and gas side.
y
For the heat insulation to the pipes at gas side,
be sure to use the material with heat-resisting
temperature 120 °C or higher.
y
To use the attached heat insulation pipe, apply the
heat insulation to the pipe connecting section of the
indoor unit securely without gap.
REQUIREMENT
y
Apply the heat insulation to the pipe connecting
section of the indoor unit securely up to the root
without exposure of the pipe. (The pipe exposed
to the outside causes water leak.)
y
Apply heat insulating materials to both the gas
side and liquid side as shown:
Wrap the pipe with the attached heat insulator
without any gap between the indoor unit.
The seam must be faced upward
(ceiling side).
Flare nut
Indoor unit
Heat insulator
(Accessory)
Union
Banding band
(locally
procured)
Heat insulator
of the pipe
Refrigerant amount to be added
For addition of the refrigerant, add refrigerant “R410A”
referring to the attached Installation Manual of outdoor
unit.
Use a scale to charge the refrigerant of speci
fi
ed
amount.
REQUIREMENT
y
Charging an excessive or too little amount of
refrigerant causes a trouble of the compressor.
Charge the refrigerant of speci
fi
ed amount.
y
A personnel who charged the refrigerant should
write down the pipe length and the added
refrigerant amount in the F-GAS label of the
outdoor unit. It is necessary to
fi
x the compressor
and refrigeration cycle malfunction.
Open the valve fully
Open the valve of the outdoor unit fully. A 4 mm-
hexagonal wrench is required for opening the valve of
liquid side.
For details, refer to the Installation Manual attached to
the outdoor unit.
Gas leak check
Check with a leak detector or soap water whether gas
leaks or not, from the pipe connecting section or cap of
the valve.
REQUIREMENT
Use a leak detector manufactured exclusively for
HFC refrigerant (R410A).
