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[Installation precautions]
Contents
Countermeasures (Reference)
When inside the
ceiling is high
temperature and
high humidity
When the indoor unit is installed where the inside of the ceiling
is 30°C (86°F) RH80% or greater, the dew point temperature
of the outer perimeter may become higher than the cabinet
surface temperature and moisture will condense on the surface
of the cabinet and water drops may fall inside the room.
→Refer to Fig.A
In addition, the humidity may vary considerably the same as
when the inside of the ceiling is close to hermetically sealed
and used as the outside air intake path.
Add heat insulating material to
(1)
the outside of the indoor unit
cabinet.
*Regarding the cassette type,
use of the “high humidity
correspondence kit (option)” is
recommended
.
Strengthen the heat insulating
(2)
material of the refrigerant
piping and drain piping also
→Refer to Fig.B
When the humidity inside the
(3)
ceiling changes considerably,
install a ventilation port
Moist air curve
Condition which
requires addition
of outside heat
insulation
Relative humidity 80%
Dry bulb temperature 30°C (86°F)
Fig.A
Work method when reinforcing the heat insulation
of on-site piping
Fig.B
Slit of heat insulating
material facing
upward
Covered gas
pipe (heat
insulation
strengthened)
Heat insulating
material (procured at
the site)
Small exposed part
of copper pipe is
desirable.
Fit tightly
(purpose is to
cover the sealant)
Binding material
Flare connection
To indoor unit
Heat insulation
reinforcement material
(procured at the site)
Contents
Countermeasures (Reference)
When using an
external duct
When using an external duct to take in new fresh air, etc.,
condensation may form on the surface of the duct due to the
effect of the outside air temperature and the humidity inside
the ceiling.
Always perform heat insulation
(1)
processing.
(Heat insulating material:
Glass wool 25mm (31/32 in.)
thick or more.)
When the remote
controller
installation site is
bad
If the cold or warm air blown out from the air conditioner
directly contacts the thermostat section of the remote
controller, the outlet temperature of the air conditioner may be
sensed and room temperature control will be different from the
room temperature and “not cooled” or “not heated” or other
trouble may occur.
In addition, there is the possbility that the same kind of trouble
may also occur when the remote controller is effected by direct
sunlight.
Install the remote controller
(1)
where it will not be directly
exposed to the cold or hot air.
Install the remote controller
(2)
where it will not be directly
exposed to sunlight or strong
lighting
