Hitachi P-N23NA2, Installation And Operation Manual

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3 INDOOR UNIT INSTALLATION
!
D A N G E R
• Check to ensure that the accessories are packed with the indoor
unit.
• Do not install the indoor units outdoors. If installed outdoors, an
electric hazard or electric leakage will occur.
• Consider the air distribution from each indoor unit to the space
of the room, and select a suitable location so that uniform
air temperature in the room can be obtained. The unit must
not be installed below 2.3 metres from the floor level, with a
recommended installation height between 2.3 and 3 metres from
the floor level. If the unit is installed higher than 3 meters, it is
also recommended that a fan be utilised to obtain uniform air
temperature in the room.
• Avoid obstacles which may hamper the air intake or the air
discharge flow.
• Pay attention to the following points when the indoor units are
installed in a hospital or other places where there are electronic
waves from medical equipment, etc.
• Do not install the indoor units where electromagnetic wave is
directly radiated to the electrical box, remote control cable or
remote control switch.
• Prepare a steel box and install the remote control switch in it.
Prepare a steel conduit tube and wire the remote control cable in
it. Then connect the ground wire with the box and tube.
• Install a noise filter when the power supply emits harmful noises.
• This unit is exclusive non electrical heater type indoor unit. It is
prohibited to install a electrical heater in the field.
• Do not put any foreign material into the indoor unit and check to
ensure that none exist in the indoor unit before the installation
and test running. Otherwise a fire or failure, etc., may occur.
!
C A U T I O N
• Do not install the indoor units in a flammable environment to avoid a
fire or an explosion.
• Check to ensure that the ceiling slab is strong enough. If not strong
enough, the indoor unit may fall down on you.
• Do not install the indoor units in a machinery shop or kitchen where
vapor from oil or mist flows to the indoor units. The oil will deposit on
the heat exchanger, thereby reducing the indoor unit performance,
and may deform. In the worst case, the oil damages the plastic parts
of the indoor unit.
• To avoid any corrosive action to the heat exchangers, do not install
the indoor units in an acid or alkaline environment.
• When lifting or moving the indoor unit, use appropriate slings to avoid
damage and be careful not to damage the insulation material on units
surface.
3.1 UNIT INSTALLATION
3.1.1 Factory-Supplied Accessories
Accessory Qty. Purpose
Pattern Board
(Carton Board)
1
For adjusting space
of false ceiling
opening and
position of the unit
Checking Scale
(cut and take out
it from the carton
board)
1
Washer with
Insulation
Material (M10)
4
For unit installation
Washer (M10) 4
Drain Hose 1
For Drain Hose
Connection
Hose Clamp 1
Accessory Qty. Purpose
Pipe insulation 1
For refrigerant
piping connection
Pipe insulation 1
Cord clamp 2
For fixing remote
control switch
wiring, louver
sensor and
insulation of piping
Cord clamp 6
Insulation
(5Tx50x200)
1
For covering wiring
connection
Insulation
(5Tx270x270)
1
For covering drain
connection
INDOOR UNIT INSTALLATION
PMML0547 rev.0 - 11/2020 4