Installation Manual
‒
8
‒
8-EN
Refrigerant piping
• Install the refrigerant pipe securely during the installation work before
operating the air conditioner. If the compressor is operated with the valve
open and without refrigerant pipe, the compressor sucks air and the
refrigeration cycles is over pressurized, which may cause a injury.
• Tighten the
fl
are nut with a torque wrench in the speci
fi
ed manner. Excessive
tighten of the
fl
are nut may cause a crack in the
fl
are nut after a long period,
which may result in refrigerant leakage.
• After the installation work, con
fi
rm that refrigerant gas does not leak. If
refrigerant gas leaks into the room and
fl
ows near a
fi
re source, such as a
cooking range, noxious gas may be generated.
• When the air conditioner has been installed or relocated, follow the
instructions in the Installation Manual and purge the air completely so that no
gases other than the refrigerant will be mixed in the refrigerating cycle.
Failure to purge the air completely may cause the air conditioner to
malfunction.
• Nitrogen gas must be used for the airtight test.
• The charge hose must be connected in such a way that it is not slack.
Electrical wiring
• Only a quali
fi
ed installer(*1) or quali
fi
ed service person(*1) is allowed to
carry out the electrical work of the air conditioner. Under no circumstances
must this work be done by an unquali
fi
ed individual since failure to carry out
the work properly may result in electric shocks and/or electrical leaks.
• To connect the electrical wires, repair the electrical parts or undertake
other electrical jobs, wear gloves to provide protection for electricians and
from heat, insulating shoes and clothing to provide protection from electric
shocks. Failure to wear this protective gear may result in electric shocks.
• Use wiring that meets the speci
fi
cations in the Installation Manual and the
stipulations in the local regulations and laws. Use of wiring which does not
meet the speci
fi
cations may give rise to electric shocks, electrical leakage,
smoking and/or a
fi
re.
• Connect earth wire. (grounding work)
Incomplete grounding causes an electric shock.
• Do not connect earth wires to gas pipes, water pipes, and lightning
conductor or telephone earth wires.
• After completing the repair or relocation work, check that the earth wires are
connected properly.
• Install a circuit breaker that meets the speci
fi
cations in the installation
manual and the stipulations in the local regulations and laws.
• Install the circuit breaker where it can be easily accessed by the agent.
• When installing the circuit breaker outdoors, install one which is designed to
be used outdoors.
