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SMMS 2-way Air Discharge Cassette Type
Installation Manual
EN-21
EN-22
Ope
ning a ceiling and installation of hanging bolts
• Decide on the installation position and orientation of the indoor unit while factoring in “SELECTION OF
INSTALLATION PLACE” in this manual and the piping and wiring work to be performed after the indoor unit has
been suspended from the ceiling.
• After the location of the indoor unit installation has been determined, open the ceiling and install hanging bolts.
• The dimensions of the ceiling opening and hanging bolt pitches are given in the outline drawing and the attached
installation pattern.
• When a ceiling already exists, lay the drain pipe, refrigerant pipe, indoor unit/outdoor unit connection wires, and
remote controller wires to their connection locations before hanging the indoor unit.
Procure hanging bolts and nuts for installing the indoor unit (these are not supplied).
How to use the installation pattern (accessory)
<For existing ceiling>
Use the installation pattern to position a ceiling opening and hanging bolts.
<For new ceiling>
Use the installation pattern to position the ceiling opening when hanging a ceiling.
• After the hanging bolts have been installed, install the indoor unit.
• Screw down the installation pattern on the ceiling panel mounting area of the indoor unit hanging fixtures. (Use the
pattern fastening screws: M5 × 16 (accessory).)
• When hanging a ceiling, open the ceiling along the outside dimensions of the installation pattern.
Hanging bolt
M10 or W3/8
4 pieces
Nut
M10 or W3/8
12 pieces
Indoor unit
Installation pattern (Accessory)
Use the pattern fastening screws: M5 × 16 (accessory).
(These screws are used only to fasten the installation pattern. When
mounting the ceiling panel, use the special-purpose mounting screws
provided with the ceiling panel (sold separately).)
Treatment of ceiling
The ceiling differs according to structure of building. For details, consult your constructor or interior finish contractor.
In the process after the ceiling board has been removed, it is important to reinforce ceiling foundation (frame) and to
keep horizontal level of installed ceiling correctly in order to prevent vibration of ceiling board.
• Cut and remove the ceiling foundation.
• Reinforce the cut surface of ceiling foundation, and add ceiling foundation for fixing the end of ceiling board.
Installation of hanging bolt
Use M10 or W3/8 hanging bolts (4 pcs, procured locally). Matching to the existing structure, set pitch according to size
in the unit external view as shown below.
New concrete slab
Install the bolts with insert brackets or anchor bolts.
Existing concrete slab
Use a hole-in anchors, hole-in plugs, or a hole-in bolts.
Steel frame structure
Use existing angles or install new support angles.
(Blade type bracket)
(Slide type bracket)
(Pipe hanging anchor bolt)
Anchor bolt
Rubber
Hanging bolt
Support angle
Hanging bolt
