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After all installation is complete, check to make sure that no refrigerant is leaking out. (The refrigerant
produces a toxic gas if exposed to flames.)
When installing or relocating the system, be sure to keep the refrigerant circuit free from substances
other than the specified refrigerant (R410A), such as air. (Any presence of air or other foreign
substance in the refrigerant circuit causes an abnormal pressure rise or rupture, resulting in injury.)
During pump-down, stop the compressor before removing the refrigerant piping. If the compressor is
still running and the stop valve is open during pump-down, air will be sucked in when the refrigerant
piping is removed, causing abnormal pressure in the freezer cycle which will lead to breakage and
even injury.
During installation, attach the refrigerant piping securely before running the compressor. If the
compressor is not attached and the stop valve is open during pump-down, air will be sucked in when
the compressor is run, causing abnormal pressure in the freezer cycle which will lead to breakage and
even injury.
Be sure to establish an earth. Do not earth the unit to a utility pipe, arrester, or telephone earth.
Incomplete earth may cause electrical shock, or fire. A high surge current from lightning or other
sources may cause damage to the air conditioner.
Be sure to install an earth leakage breaker. Failure to install an earth leakage breaker may result in
electric shocks, or fire.
CAUTION !
Do not install the air conditioner in a place where there is danger of exposure to inflammable gas
leakage. If the gas leaks and builds up around the unit, it may catch fire.
Establish drain piping according to the instructions of this manual. Inadequate piping may cause
flooding.
Tighten the flare nut according to the specified method such as with a torque wrench. If the flare nut is
tightened too hard, the flare nut may crack after a long time and cause refrigerant leakage.
