6
English
Control box
13/16 (20) or more
Ceiling
Inspection hatch
A
Inspection
hatch 1
17-3/4×17-3/4
(450×450)
Inspection
hatch 3
Control box
Control box
unit: in. (mm)
31-1/2
(800)
31-1/2
(800)
Arrow A-1
Arrow A-2
Inspection hatch 2
(Indoor unit size
+11-13/16 (300)
or more)
(Indoor unit
size or more)
7-7/8 (200) or less
D=B+11-13/16 (300) or more
B
< In the case of (1)-2, 3 >
Fig. 4
Table 1
(unit [in. (mm)])
Model
B
C
D
15·18·24 type
39-3/8
(1000)
40-7/8
(1038)
51-3/16
(1300)
30·36·48 type
55-1/8
(1400)
56-5/8
(1438)
66-15/16
(1700)
54 type
61
(1550)
62-1/2
(1588)
72-13/16
(1850)
(2) Mount canvas ducts to the discharge and suction so
that the vibration of the indoor unit will not be trans-
mitted to the ducts or ceiling. Furthermore, attach
sound absorbing material (thermal insulation mate-
rial) to the duct inner walls and anti-vibration rubber
to the suspension bolts (refer to 8. DUCT WORK).
(3) The indoor unit is set to standard external static
pressure.
•
If external static pressure is higher or lower than the
standard set value, the remote controller may be used
to make field setting change in the external static pres
-
sure.
Refer to
10. FIELD SETTING
.
(4) Open installation holes
(in the case of installation onto the existing ceiling).
•
Open the installation holes on the ceiling of the instal-
lation location, and work on the refrigerant piping, drain
piping, remote controller wiring (unless a wireless re-
mote controller is used), and wiring between the indoor
and outdoor units to the piping connection port and
wiring connection port of the indoor unit (refer to each
piping and wiring procedure items).
•
Ceiling framework reinforcement may be required in
order to keep the ceiling horizontal and prevent ceiling
vibration after opening the ceiling holes. For details,
consult your building and interior work contractors.
(5) Install the suspension bolts.
•
Use either a M8-M10 size bolt or equivalent.
Use hole-in-anchors for the existing bolts and embed
-
ded inserts or foundation bolts for new bolts, and fix the
indoor unit firmly to the building so that it may withstand
the weight of the unit.
In addition, adjust clearance (2-4 in. (50-100 mm)) from
the ceiling in advance.
<Installation examples>
Foundation bolt
Suspension bolt
Indoor
unit
Ceiling slab
Long nut or
turnbuckle
Note) Components shown in the figure above are
all local procurement.
(6) In the case of changing the preset suction to bottom
side suction, replace the chamber cover and the suc-
tion flange. (Refer to Fig. 5)
1. Remove the suction flange and chamber cover.
2. Replace the suction flange and the chamber cover.
CAUTION
•
Secure a sufficient service space for the drain pan and
electrical components before installing the indoor unit.
•
Secure a sufficient service space for the filter chamber,
and peripheral components before installing the indoor
unit.
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