Hitachi RCD-0.8FSN3 Installation And Operation Manual page 21

INDOOR UNIT INSTALLATION
14.2.2 Installation location
!
D A N G E R
• Provide a sufficiently strong foundation. If not, the unit may fall
down and it may lead to injuries.
• Do not install the unit where flammable gas may be generated or
flow. It may cause a fire.
Select the installation location as follows:
• (A) Minimum Space
• (B) Down Slope Pitch of Drain Pipe: 1/25 to 1/100
• The sensing area for the motion sensor is shown in the
figure below when applying the motion sensor kit (option)
with the air panel.
Installation Height of Indoor Unit: h (m)
Sensing Area for Motion Sensor: øa (m)
Motion Detection
Motion sensor
17 PMML0425A rev.0 - 02/2016 - P5415720
Min. 10mm
Clearance
345mm
Unit Height in
false ceiling
Drain piping
Down Slope Pitch:
1/25 to 1/100
3.1
Approx. 8.5
Human Motion
h
φa
From floor surface 0.8m
• Consider the air distribution from the indoor unit to the space
of the room, and select a suitable location so that uniform air
temperature in the room can be obtained.
• Do not place flammable materials in the service space for
the indoor unit.
• Install the unit where there is no obstacles which may
hamper the suction air and discharged air.
• Do not install the unit near a door or a window where the
indoor unit may contact humid outside air. Otherwise, dew
condensation may occur.
• In case temperature and humidity inside the ceiling exceeds
30ºC/RH (Relative Humidity) 80%, apply additional insulation
materials to the external surface of the indoor unit to avoid
dew condensation.
• If installing the indoor unit to a high ceiling, the warmed air
may stay around the ceiling during heating operation. Thus,
the parallel installing of a circulator is recommended.
• Do not install the indoor unit where the airflow from the air
outlet blows directly to the temperature detecting devices
such an alarm device or a control device. It may cause a
failure of an alarm device or a control device.
• For simultaneous operation of multiple units (twin, triple and
quad combination) , the units must be installed in the same
room and be operated under the same conditions. If the
room is partitioned by a wall, furniture or a curtain, etc., it
may cause an operation failure. Take care when rearranging
furniture or remodeling the room after installation as well.