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• If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fire, noxious gas may generate.
• Helmet must be worn to protect your head from falling objects. Especially, when you work
under an inspection opening, helmet must be worn to protect your head from falling objects
from the opening.
Selection of installation location
• When the air conditioner is installed in a small room, provide appropriate measures to ensure
that the concentration of refrigerant leakage occur in the room does not exceed the critical
level.
• Do not install in a location where flammable gas leaks are possible. If the gas leak and
accumulate around the unit, it may ignite and cause a fire.
• To transport the Dx-coil interface, wear shoes with additional protective toe caps.
• Do not place any combustion appliance in a place where it is directly exposed to the wind of
air conditioner, otherwise it may cause imperfect combustion.
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.
• After the installation work, confirm that refrigerant gas does not leak. If refrigerant gas leaks
into the room and flows near a fire 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.
• Due to the pressure of R410A is higher than that of other refrigerant (ex. R22), be sure to
use the pipe specific for R410A and use the special tool for the pipe processing.
Electrical wiring
• Only a qualified installer or qualified service person is allowed to carry out the
electrical work of the air conditioner. Under no circumstances must this work be done by an
unqualified 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, 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 specifications in the Installation Manual and the stipulations in the
local regulations and laws. Use of wiring which does not meet the specifications may give
rise to electric shocks, electrical leakage, smoking and/or a fire.
• 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 specifications 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.
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