P5417050-rev.1
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5. Installation Work
5.1 Opening of False Ceiling and Location of Suspension Bolts
1. Determine the final location and installation orientation of the indoor unit with respect to the space
allowed for piping, wiring, and maintenance access.
2. Then cut away the false ceiling area for the indoor unit installation and install suspension bolts.
3. The dimensions for an opening false ceiling and location of suspension bolts are as shown below.
4. Ceiling work differs depending on the building structure. Consult with a building contractor or an interior
finishing worker for more information.
NOTE:
Do not install electric lighting in too close of a proximity to the unit as unit operation can cause the
lights to flicker.
5.2 Installing Suspension Bolts
1. Reinforce the designated opening in the false ceiling area. Use approved materials of sufficient tensile
strength to allow for quality installation.
2. Strengthen suspension bolts with support plates as required in preparation for an earthquake. (Refer
to the Safety Section for more information.)
Use field-supplied M10 suspension bolts and support plates.
For Wooden Beam
For Concrete Slab
Install the indoor unit to the tie beam (for single-
storied building) or to the second floor girder (for
two-storied building), and use sufficiently strong
squared timber as shown below.
inch (mm)
Interval between Beams
Squared Timber
< 35-7/16 (900)
2-3/8 (60) square
< 70-7/8 (1800)
3-9/16 (90) square
Install suspension bolts so that it can withstand the
indoor unit weight load.
Insert
(221 to 331 lbs)
Steel
Concrete
Suspension Bolt
(W3/8 or M10)
5-7/8 to 6-5/16 inches
13/16
(20)
3 (76)
(Gas Piping)
3-1/4 (83)
(Liquid Piping)
41-3/4 (1060)
35-13/16 (910)
2-9/16 (65)
(Condensate Piping)
Dimension of Opening : a
Dimension of Suspension Bolts : b
Dimension of Opening
:
26-3/8 (670
)
Dimension of Suspension Bolts
:
21-1/4 (540
)
4-Positions of Suspension Bolts
M10 or W3/8 (Field-Supplied)
Decorative Panel
Wiring Connection Side
Condensate Piping Connection Side
Piping Connection Side
4-1/2 x 1-1/4 Holes (For Suspension Bolt)
13/16
(20)
13/16 (20)
13/16 (20)
Unit: inch (mm)