3
3.3. Installation of duct (in case of fresh air intake)
(Fig. 3-3)
Caution:
Linkage of duct fan and air conditioner
ln case that a duct fan is used, be sure to make it linked with the air conditioner
when outside air is taken.
Do not run the duct fan only. It can cause dew drop.
Making a duct flange (prepared locally)
• The shape of duct flange shown left is recommended.
Installation of duct flange
• Cut out the cutout hole. Do not knock it out.
• Install a duct flange to the cutout hole of the indoor unit with three 4
×
10 mm, 4
×
1/2 inch tapping screws which should be prepared locally.
Installation of duct (should be prepared locally)
• Prepare a duct of which inner diameter fits into the outer diameter of the duct
flange.
• In case that the environment above the ceiling is high temperature and high humidity,
wrap the duct in a heat insulate to avoid causing dew drop on the wall.
3. Installing the indoor unit
Fig. 3-1
Caution:
Install the indoor unit at least 2.4 m, 8 ft. above floor or grade level.
3.1. Check the indoor unit accessories (Fig. 3-1)
The indoor unit should be supplied with the following accessories.
Accessory name
Q’ty
1
Installation template
1
2
Washers (with insulation)
Washers (without insulation)
4
4
3
Pipe cover (for refrigerant piping joint)
Small diameter (liquid)
Large diameter (gas)
1
1
4
Band (large)
Band (small)
6
2
5
Screw with washer (M5
×
25) for mounting grille
4
6
Drain socket
1
7
Insulation
1
3.. Ceiling openings and suspension bolt installation
locations (Fig. 3-2)
• Using the installation template (top of the package) and the gauge (supplied as an
accessory with the grille), make an opening in the ceiling so that the main unit can
be installed as shown in the diagram. (The method for using the template and the
gauge are shown.)
* Before using, check the dimensions of template and gauge, because they
change due to fluctuations of temperature and humidity.
* The dimensions of ceiling opening can be regulated within the range shown in
following diagram; so center the main unit against the opening of ceiling, en-
suring that the respective opposite sides on all sides of the clearance between
them becomes identical.
• Use M10 (3/8”) suspension bolts.
* Suspension bolts are to be procured at the field.
• Install securely, ensuring that there is no clearance between the ceiling panel &
grille, and between the main unit & grille.
A
Outer side of main unit
B
Bolt pitch
C
Ceiling opening
D
Outer side of Grille
E
Grille
F
Ceiling
G
Min. 500 mm, 20 inch, (Entire periphery)
If setting the maintenance space for
G
, be sure
to leave is a minimum of 700 mm, 28 inch.
H
Maintenance space
I
Fresh air intake
J
Angle
K
Electric component box
* Note that the space between ceiling panel of the unit and ceiling slab and etc must be 10 to
15 mm, 3/8 to 9/16 inch to be left.
* Leave the maintenance space at the electric component box end.
A
Duct flange recommended shape
(Thickness: 0.8 mm, 1/32 inch or more)
B
3-ø5 mm, ø3/16 inch hole
C
Detail drawing of fresh air intake
D
Indoor unit
E
Ceiling surface
F
3-ø2.8 mm, ø1/8 inch Burring hole
G
ø73.4 mm, ø2-7/8 inch cutout hole
H
Duct flange (Prepared locally)
I
4
×
10 mm, 4
×
1/2 inch Tapping screw
(Prepared locally)
J
Duct
Fig. 3-
Fig. 3-3
A
(inch)
C
(inch)
1
2
3
4
6
5
7
