Toshiba RAV-SM1100UT-E Service Manual page 37

Opening a ceiling and installation of hanging bolts
<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.
(1) Cut and remove the ceiling foundation.
(2) Reinforce the cut surface of ceiling foundation, and add ceiling foundation for fixing the end of ceiling board.
<Installation of hanging bolt>
Use M10 hanging bolts (4 pcs, to be local procure). 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.
(Blade type (Slide type
bracket) bracket)
Installation of ceiling opening and hanging bolt
Adjust nut position (lower side) so that clearance between the
attached washer (lower side) and ceiling board is 88mm.
Hanging bolt
Nut (Upper side)
Washer
(Upper side)
(Hanging bracket
main unit)
Washer
(Lower side)
Nuts (Lower side)
Ceiling boards
• Hang up the main unit by hanging the nut of hanging bolt to
T groove of hanging bracket of the main unit.
• Using the level vial, etc., set the horizontal level of the main
unit within 5mm.
• Using the installation gauge, check and adjust the positional
relation between the main unit and ceiling opening hole, and
hanging-up height of the main unit. (Direction to be used is
indicated on the installation gauge.)
1) Check lower side of the indoor unit locates at position (12
to 17) mm higher than the lower surface of the ceiling
board. (4 corners)
2) Check clearance between side of the indoor unit and the
ceiling board is 20 to 30mm. (Common to 4 corners)
Use existing angles or install new
support angles.
Rubber
Anchor bolt
(Pipe hanging
anchor bolt)
Level
Hanging bracket
Steel flame structure
Hanging bolt
Hanging bolt Support angle
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
Nut
(W3/8 or M10)
Hanging bolt
(1) Required those other than M10 flat washer at site.
(2) To prevent falling-off of bolt (safety), be sure to
set it just under the hanging bracket as shown
in the figure.
Level vial (Horizontal: within 5mm)
Indoor unit
Installation
gauge
Indoor unit
Ceiling
board
34
Existing concrete slab
Use a hole-in anchors, hole-in
plugs, or a hole-in bolts.
(1)
M10 flat washer
(Accessory)
(2)
M10 flat washer
(Accessory)
Hanging bolt
Hanging
2) 12 to 17
metal
1) 20 to 30
mm
Ceiling board
1) 12
Installation
gauge
2) 20 to
mm
+5
mm
–0
30mm