4
■
English
Choosing an Installation Site
2.
Wireless remote controller
• Turn on all the fluorescent lamps in the room, if any, and find the site where remote controller signals are properly
received by the indoor unit (within 13ft (4m)).
3.
Outdoor unit
• For outdoor unit installation, see the installation manual supplied with the outdoor unit.
Preparations before Installation
■
Relation of the unit to the suspension bolt positions.
• Install the inspection opening on the control box side where
maintenance and inspection of the control box are easy. Install
the inspection opening also in the lower part of the unit.
■
Make sure the range of the unit’s external static pres-
sure is not exceeded.
(See the technical documentation for the range of the external
static pressure setting.)
■
Open the installation hole. (Pre-set ceilings)
• Once the installation hole is opened in the ceiling where the unit
is to be installed, pass refrigerant piping, drain piping, transmis
-
sion wiring, and remote controller wiring (unneeded if using a
wireless remote controller) to the unit’s piping and wiring holes.
See “
Refrigerant Piping Work
”, “
Drain Piping Work
”, and
“
Wiring
”.
• After opening the ceiling hole, make sure ceiling is level if
needed. It might be necessary to reinforce the ceiling frame to
prevent shaking. Consult an architect or carpenter for details.
■
Install the suspension bolts.
(Use W3/8 to M10 suspension bolts.)
• 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. (Refer to Fig.)
19-11/16 (500)
17-3/4 (450)
(Inspection opening
size)
Air outlet
Suspension
bolt pitch
(unit : in (mm))
Air inlet
Control
box
(Suspension bolt pitch)
Ceiling
24-7/16 (620)
24-7/16 (620)
A
Arrow view
Inspection door
(Ceiling opening)
<SERVICE SPACE
>
A
B
FDXS09/12
CDXS15/18
A
27-9/16 (700)
B
29-1/8 (740)
37 (940)
35-7/16 (900)
CDXS24
44-7/8 (1140)
43-5/16 (1000)
Note: All the above parts are field supplied.
Suspension bolt
Long nut or turn-buckle
Anchor bolt
Indoor unit
Ceiling slab
■
Mount chamber cover and air filter (acces
-
sory).
For bottom intake, replace the chamber cover and the
protection net in the procedure listed in Fig.
(1) Remove the protection net. (6 locations)
Remove the chamber cover. (7 locations)
(2) Reattach the removed chamber cover in the
orientation shown in Fig. (7 locations)
Reattach the removed protection net in the
orientation shown in Fig. (6 locations)
Refer to Fig. for the direction of the protection net.
Air inlet
Air inlet
(1)
Chamber
cover
(2)
Air outlet
Air outlet
Chamber
cover
Protection net
Protection net
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