40-EN
39-EN
– 20 –
EN
EN
EN
EN
Airtight test / Air purge, etc.
For air tightness test, vacuum drying and adding
refrigerant, refer to the Installation Manual attached to
the outdoor unit.
CAUTION
Do not supply power to the indoor unit until the
airtight test and vacuuming are completed. (If the
indoor unit is powered on, the pulse motor valve is
fully closed, which extends the time for vacuuming.)
Open the valve fully
Open the valve of the outdoor unit fully.
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, 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
Wrap heat insulator with its slits facing up
(ceiling side).
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
Heat insulator
of the pipe
Banding band
(Locally procured)
Union
Heat insulation
pipe
(Accessory)
Indoor unit
9
Electrical connection
WARNING
y
Use the speci
fi
ed wires for wiring connect the terminals. Securely
fi
x them to prevent external forces
applied to the terminals from affecting the terminals.
Incomplete connection or
fi
xation may cause a
fi
re or other trouble.
y
Connect earth wire. (grounding work)
Incomplete earthing cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
y
Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a
fi
re.
CAUTION
y
The wire size and wire length of the communication line differs depending on the outdoor unit series
to be connected.
y
If incorrect / incomplete wiring is carried out, it will cause an electrical
fi
re or smoke.
y
Install an earth leakage breaker that is not tripped by shock waves.
If an earth leakage breaker is not installed, an electric shock may be caused.
y
Use the cord clamps attached to the product.
y
Do not damage or scratch the conductive core and inner insulator of power and control wires when peeling
them.
y
Use the power supply wire and control wires of speci
fi
ed thickness, type, and protective devices required.
y
Do not connect 208V-240V power to the terminal blocks (Uv (U1)), (Uv (U2)), (A), (B) for control wiring.
(Otherwise, the system will fail.)
y
Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
REQUIREMENT
y
For power supply wiring, strictly conform to the Local Regulation in each country.
y
For wiring of power supply of the outdoor units, follow the Installation Manual of each outdoor unit.
y
After connecting wires to the terminal blocks, provide a trap and
fi
x wires with the cord clamp.
y
Run the refrigerant piping line and communication line in the same line.
y
Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
