En-3
3. INSTALLATION WORK
Correct initial installation location is important because it is difficult to move unit after it is
installed.
3.1. Selecting an installation location
WARNING
Select installation locations that can properly support the weight of the indoor. Install the
units securely so that they do not topple or fall.
CAUTION
Do not install the unit in the following areas:
• Area with high salt content, such as at the seaside.
• It will deteriorate metal parts, causing the parts to fail or the unit to leak water.
• Area filled with mineral oil or containing a large amount of splashed oil or steam, such
as a kitchen.
• It will deteriorate plastic parts, causing the parts to fail or the unit to leak water.
• Area that generates substances that adversely affect the equipment, such as sulfuric
gas, chlorine gas, acid, or alkali.
• It will cause the copper pipes and brazed joints to corrode, which can cause refrigerant
leakage.
• Area that can cause combustible gas to leak, contains suspended carbon fibers or
flammable dust, or volatile flammables such as paint thinner or gasoline.
• If gas leaks and settles around the unit, it can cause a fire.
• Area where animals may urinate on the unit or ammonia may be generated.
Do not use the unit for special purposes, such as storing food, raising animals, growing
plants, or preserving precision devices or art objects.
It can degrade the quality of the preserved or stored objects.
Do not install where there is the danger of combustible gas leakage.
Do not install the unit near a source of heat, steam, or flammable gas.
Install the unit where drainage does not cause any trouble.
Install the indoor unit, power supply cable, transmission cable, and remote controller
cable at least 40 in (1 m) away from a television or radio receivers. The purpose of this
is to prevent TV reception interference or radio noise.
(Even if they are installed more than 40 in (1 m) apart, you could still receive noise
under some signal conditions.)
If children under 10 years old may approach the unit, take preventive measures so that
they cannot reach the unit.
Use the “Insulation kit for high humidity” (option), when the condition under the roof is
over 80% in humidity and over 86 °F (30 °C) in temperature. Otherwise, there is a risk
of condensation on the ceiling.
Decide the mounting position with the customer as follows:
(1) Install the indoor unit on a place having a sufficient strength so that it withstands
against the weight of the indoor unit.
(2) The inlet and outlet ports should not be obstructed; the air should be able to blow all
over the room.
(3) Leave the space required to service the air conditioner.
(4) A place from where the air can be distributed evenly throughout the room by the unit.
(5) Install the unit where connection to the outdoor unit (or RB unit) is easy.
(6) Install the unit where the connection pipe can be easily installed.
(7) Install the unit where the drain pipe can be easily installed.
(8) Install the unit where noise and vibrations are not amplified.
(9) Take servicing, etc., into consideration and leave the spaces. Also install the unit
where the filter can be removed.
3.2. Installation dimensions
• Leave the space specified in Fig. A so that the air from the blower will cover the entire
room.
• Install the indoor unit on a place having a sufficient strength so that it withstands against
the weight of the indoor unit.
• A place from where drainage can be extracted outdoors easily.
WARNING
Never install in a room where there is the potential of leaking flammable gas. A spark
could ignite the gas and cause an explosion or fire.
Avoid installing in a location with high temperature.
Fig. A
Obstruction
71 in (1800 mm) to
H
40 in
(1,000 mm)
or more
40 in
(1,000 mm)
or more
Floor
Strong and durable ceiling
11 in (262 mm)
or more
H: Maximum height from floor to ceiling
Function set-
ting
H [in (mm)]
AUUA4
AUUA7
AUUA9 AUUA12 AUUA14 AUUA18 AUUA24
Standard mode
106
(2,700)
106
(2,700)
106
(2,700)
106
(2,700)
106
(2,700)
106
(2,700)
106
(2,700)
High Ceiling
mode
-
-
-
118
(3,000)
118
(3,000)
118
(3,000)
118
(3,000)
* Be sure to make the function settings with the remote controller according to the
installed ceiling height.
3.3. Discharge direction setting
The discharge direction can be selected as shown below.
Fig. B
(4 directions)
(3 directions)
4 (100) or more
Unit: in (mm)
Piping position
* Select the most appropriate
airflow direction from 3 or 4 di-
rections according to the shape
of the room and the installation
position.
* When changing the number of
outlets, we recommend using
the optional AIR OUTLET
SHUTTER PLATE KIT to close
the outlet.
* For the specific closing pattern, please refer to the attached AIR OUTLET SHUTTER
PLATE KIT’S MANUAL. (Do so before installing the cassette grille as it will be installed
on the body.)
3.4. Installing the unit
WARNING
Install the air conditioner in a location which can withstand a load of at least 5 times the
weight of the main unit and which will not amplify sound or vibration. If the installation
location is not strong enough, the indoor unit may fall and cause injuries.
If the job is done with the panel frame only, there is a risk that the unit will come loose.
Please take care.
When fastening the hangers, make the bolt positions uniform.
Perform final tightening by tightening the double nut firmly. The product may fall if not
installed properly.
Using a level, or vinyl hose filled with water, fine adjust so that the body is level.
Install the air conditioner as follows.
Indoor unit installation
(1) Make the holes for installing in the ceiling (Fig. D).
(2) Install the hanging bolts (M10), refer to the position in Fig. C.
(3) Install special nut A, then special nut B onto the hanging bolt (Fig. D).
(4) Raise the body and mount its hooks onto the hanging bolt between the special nuts.
(5) Turn special nut B to adjust the height of the body.
(6) Be sure to leave service access for future service at the designated position.
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