6■English
2.
Mount canvas ducts, sound absorbing material and anti-vibration rubber.
• Mount canvas ducts to the air outlet and inlet so that the vibration of the indoor unit will not be transmitted to the ducts or
ceiling.
Furthermore, attach sound absorbing material (thermal insulation material) to the duct inner walls and anti-vibration
rubber to the suspension bolts (refer to “10. Duct work” (page 15)).
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 on-
site setting change in the external static pressure.
Refer to “Field settings” (page 18).
4. Open installation holes
(in the case of installation onto the existing ceiling).
• Open the installation holes on the ceiling of the installation location, and work on the refrigerant piping, drain piping,
remote controller wiring, 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 upholstery work contractors.
5. Installing the suspension bolts
(Use either a M8-M10 size bolt or the equivalent)
Use a hole-in anchor for existing ceilings, and a sunken
insert, sunken anchor or other eld supplied parts for new
ceilings to reinforce the ceiling to bear the weight of the unit.
Adjust clearance (2-4 inch (50-100mm)) from the ceiling
before proceeding further.
• All the above parts are eld supplied.
2-4
unit: inch (mm)
Anchor
Ceiling slab
Installation Example
Long nut or turn-buckle
Suspension bolt
False ceiling
6. In the case of changing the preset suction to underside suction, replace
the chamber cover and the suction ange.
1. Remove the suction ange and chamber cover.
2. Replace the suction ange and the chamber cover.
Chamber cover
CAUTION
• Secure a sufcient maintenance space for the drain pan and electrical components before installing the indoor unit.
• Secure a sufcient maintenance space for the lter chamber, and peripheral components before installing the indoor unit.
English
01_EN_3P674701-1B.indd 6 2022/06/02 10:06:23
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