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1. The following should always be observed for safety
Caution:
• Perform grounding.
Do not connect the ground wire to a gas pipe, water pipe arrester or tel-
ephone ground wire. Defective grounding could cause an electric shock.
• Do not install the unit in a place where an inflammable gas leaks.
If gas leaks and accumulates in the area surrounding the unit, it could cause
an explosion.
• Install a ground leakage breaker depending on the installation place (where
it is humid).
2. Selecting the installation location
OK
OK
14
OK
NG
Fig. 2-1
If a ground leakage breaker is not installed, it could cause an electric shock.
• Perform the drainage/piping work securely according to the installation
manual.
If there is a defect in the drainage/piping work, water could drop from the
unit and household goods could be wet and damaged.
• Fasten a flare nut with a torque wrench as specified in this manual.
When fastened too tight, a flare nut may broken after a long period and
cause a leakage of refrigerant.
2.1. Outdoor unit
• R32 is heavier than air—as well as other refrigerants—so tends to accumulate at
the base (in the vicinity of the floor). If R32 accumulates around base, it may reach
a flammable concentration in case room is small. To avoid ignition, maintaining a
safe work environment is required by ensuring appropriate ventilation. If a refrig-
erant leak is confirmed in a room or an area where there is insufficient ventilation,
refrain from using of flames until the work environment can be improved by ensur-
ing appropriate ventilation.
• Where it is not exposed to strong wind.
• Where airflow is good and dustless.
• Where it is not exposed to rain and direct sunshine.
• Where neighbours are not annoyed by operation sound or hot air.
• Where rigid wall or support is available to prevent the increase of operation sound
or vibration.
• Where there is no risk of combustible gas leakage.
• When installing the unit at a high level, be sure to fix the unit legs.
• Where it is at least 3 m away from the antenna of TV set or radio. (Otherwise,
images would be disturbed or noise would be generated.)
• Please install it in an area not affected by snowfall or blowing snow. In areas with
heavy snow, please install a canopy, a pedestal and/or some baffle boards.
• Install the unit horizontally.
• Refrigerant pipes connection shall be accessible for maintenance purposes.
/ Install outdoor units in a place where at least one of the four sides is open, and in
a sufficiently large space without depressions. (Fig. 2-1)
Caution:
Avoid the following places for installation where air conditioner trouble is li-
able to occur.
• Where there is too much machine oil.
• Salty environment as seaside areas.
• Hot-spring areas.
• Where sulfide gas exists.
• Other special atmospheric areas.
The outdoor unit produces condensate during the heating operation. Select
the installation place to ensure to prevent the outdoor unit and/or the grounds
from being wet by drain water or damaged by frozen drain water.
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