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(2) The fan speed for this indoor unit is preset to provide
standard external static pressure.
• If higher or lower external static pressure is required,
reposition the adapter for the PC board. Refer to “9. WIR-
ING EXAMPLE AND HOW TO SET THE REMOTE CON-
TROLLER”.
(3) Install the suspension bolts. (Use bolts of 10 mm diameter.)
Use a hole-in-anchor, sunken insert, sunken anchor for
existing ceilings, and a sunken insert, sunken anchor or
other part to be procured in the field to reinforce the ceiling
to bearing the weight of the unit.
5.
INDOOR UNIT INSTALLATION
〈〈
Installing optional accessories (except for the decoration
panel) before installing the indoor unit is easier.
As for the parts to be used for installation work, be sure to use
the provided accessories and specified parts designated by our
company.
〉〉
(1) Install the indoor unit temporarily.
• Attach the hanger bracket to the suspension bolt. Be sure
to fix it securely by using a nut and washer from the upper
and lower sides of the hanger bracket.
(2) Check the unit is horizontally level.
CAUTION
•
The indoor unit is equipped with a built-in drain pump
and float switch. At each of the unit
’
s 4 corners, verify
that it is level by using a level or a water-filled vinyl tube.
(If the unit is inclined against condensate flow, the float
switch may malfunction and cause water to drip.)
(3) Tighten the upper nut.
(4) Fix the paper pattern for installation.
• The paper pattern for installation corresponds with the mea-
surements of the ceiling opening. Consult the builder for details.
• Attach the paper pattern for installation to the unit with the
screws as shown in the drawing.
The paper pattern for installation is marked for 3 types of ceil-
ing openings. Read the notations on the paper pattern care-
fully when installing.
6.
REFRIGERANT PIPING WORK
Selection of Pipes
• Use the following type of refrigerant pipe.
Material: Phosphorus deoxidized seamless copper pipe
(C1220T-1/2H or C1220T-H)
Pipe wall thickness: Product withstanding 12.3 MPa
Pipe wall thickness examples
(length : mm)
• Be sure to use pipes with clean outer and inner surfaces free
of contaminants, such as sulfides, oxides, dust, chip, oil and
fat, and moisture.
It is desirable that the adhesion oil in the piping system does
not exceed 30 mg per 10 m.
• Be sure to conduct piping work within the maximum permis-
sible length, permissible difference in height, and permissible
length after branching as shown in the following table.
• The refrigerant branching kit sold as an optional accessory is
required for the branching of piping.
Select the kit according to the following table for the selection
points of refrigerant branching kits.
For mounting air inlet panel directly
Model
A (mm)
FXSN20 · 25 · 32AV1
610
FXSN40 · 50AV1
760
FXSN63 · 100AV1
1460
Air inlet panel
350
or more
460
(Optional accessory)
Ceiling surface
Ceiling
opening
A
(Ceiling opening)
Indoor unit
(Back side)
(length : mm)
180
Installation example
Note: All the above parts are field supplied.
Suspension bolt
Long nut or turn-buckle
Anchor
Indoor unit
Ceiling slab
Part to be procured in the field
[ Securing the hanger bracket ]
Washer (accessory)
Hanger bracket
Tighten
(double nut)
Pipe size
(outer diameter)
Quality of material
Minimum wall
thickness
φ
6.4
1/2H
0.8
φ
9.5
1/2H
1.0
φ
12.7
1/2H
1.3
φ
15.9
1/2H
1.8
Vinyl tube
Level
Screw for fixing the for
paper pattern for installation
(× 6 accessory)
Paper pattern for
installation
01_EN_3P233622-5F.fm Page 5 Thursday, December 18, 2008 4:21 PM
