9
3. Selecting an installation site & accessories
• Select a site with sturdy fixed surface that is strong enough to support the weight of
unit.
• Before installing unit, the routing to carry in unit to the installation site should be
determined.
• Select a site where the unit is not affected by entering air.
• Select a site where the flow of supply and return air is not blocked.
• Select a site where refrigerant piping can easily be installed to the outside.
• Select a site which allows the supply air to be fully distributed in a room.
• Do not install unit at a site near a lot of oil or steam.
• Do not install unit at a site where combustible gas may generate, flow in, stagnate
or leak.
• Do not install unit at a site where there is equipment generating high frequency
waves (a high frequency wave welder for example).
• Do not install unit at a site where fire detector is located at the supply air side. (Fire
detector may operate erroneously due to the heated air supplied during heating
operation.)
• If there are chemicals in the area, such as chemical plants and hospitals, full inves-
tigation is required before installing unit. (The plastic components may be dam-
aged depending on the chemical product applied.)
• If the unit runs for long hours when the air above the ceiling is at high temperature/
high humidity (due point above 79 °F [26 °C]), condensation may be produced in
the indoor unit. Add insulation material (10-20 mm [13/32 to 13/16 in]) to the entire
surface of the indoor unit to avoid condensation.
3.1. Install the indoor unit on a ceiling strong enough
to sustain its weight
[Fig. 3-1] (P.2)
A
Access door
B
Electrical parts box
C
Air inlet
D
Air outlet
E
Ceiling surface
F
Service space (viewed from the side)
G
Service space (viewed from the direction of arrow)
1
600 mm [23-5/8 in] or more
2
100 mm [3-15/16 in] or more
3
10 mm [13/32 in] or more
4
300 mm [11-13/16 in] or more
Warning:
The unit must be securely installed on a structure that can sustain its weight. If
the unit is mounted on an unstable structure, it may fall down, causing injuries.
3.2. Securing installation and service space
• Select the optimum direction of supply airflow according to the configuration of the
room and the installation position.
• As the piping and wiring are connected at the bottom and side surfaces, and the
maintenance is made at the same surfaces, allow a proper space properly. For the
efficient suspension work and safety, provide a space as much as possible.
3.3. Outdoor unit
Ventilation and service space
Units should be installed by licensed contractor accordingly to local code require-
ments.
For outdoor units to be connected, refer to the Installation Manual that comes with
the units.
3.4. Indoor unit accessories
The unit is provided with the following accessories:
No.
Name
Quantity
1
Pipe cover (for refrigerant piping joint) 120 mm [3/4 in] Small diameter
1
2
Pipe cover (for refrigerant piping joint) 120 mm [3/4 in] Large diameter
1
3
Tie band
7
4
Remote controller parts
1
5
Remote controller cable
1
6
Washer (for hanging)
8
7
Drain hose
1
8
Pipe cover (for Drain hose) 60 mm [3/8 in]
1
9
Pipe cover (for Drain hose) 30 mm [3/16 in]
1
0
Washer (for power source wiring)
2
4. Fixing hanging bolts
4.1. Fixing hanging bolts
[Fig. 4-1] (P.2)
A
Center of gravity
Hanging structure
• Ceiling: The ceiling structure varies from building to one another. For detailed infor-
mation, consult the construction company.
5. Installing the unit
5.1. Hanging the unit
s
s
s
s
s
Transport the indoor unit to the site in its original packing material.
s
s
s
s
s
To hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
[Fig. 5-1] (P.2)
A
Unit
B
Lifting machine
[Fig. 5-2] (P.2)
C
Nuts (field supplied)
D
Washers (accessory)
E
M10 hanging bolt (field supplied)
5.2. Confirming the unit’s position and attaching hang-
ing bolts
s
s
s
s
s
Use the gauge supplied with the panel to confirm that the unit and hanging
bolts are positioned in place. If they are not positioned in place, it may
condensated due to drafts. Be sure to check the position.
s
s
s
s
s
Use a level to check that the surface indicated by
A
A
A
A
A
is straight. Ensure that
the hanging bolt nuts are tightened to fix the hanging bolts.
s
s
s
s
s
To ensure that drain is discharging properly, be sure to hang the unit is
straight using a level.
[Fig. 5-3] (P.2)
A
Indoor unit’s bottom surface
Caution:
Be sure to install the unit level.
Center of gravity and Product Weight
Model name
SEZ-KD09
SEZ-KD12
SEZ-KD15
SEZ-KD18
W (mm [in])
625 [24-5/8]
625 [24-5/8]
625 [24-5/8]
625 [24-5/8]
L (mm [in])
752 [29-5/8]
952 [37-1/2]
952 [37-1/2]
1152 [45-3/8]
X (mm [in])
263 [10-3/8]
286 [11-9/32]
280 [11-1/32]
285 [11-1/4]
Y (mm [in])
351 [13-27/32]
448 [17-21/32]
437 [17-7/32]
527 [20-3/4]
Z (mm [in])
106 [4-3/16]
104 [4-1/8]
104 [4-1/8]
104 [4-1/8]
Product Weight (kg [Ib])
19 [42]
22 [50]
24 [54]
28 [62]
• If necessary, reinforce the hanging bolts to protect against earthquakes.
* Use M10 for hanging bolts and reinforcements to protect against earthquake
(field supplied).
1
Ceiling reinforcement (edge beam, etc.) must be required to keep the ceiling level
and to prevent it from vibrating.
2
Cut and remove the ceiling beams.
3
Reinforce the ceiling, and add other beams for fixing the ceiling boards.
