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Installation (continued)
Installing to a concrete structure
Concrete ceiling
Hex nut
To the screen
8 - ENGLISH
Anchoring nut
or curled plug
Flat washer
Spring washer
Hex nut
Ceiling mount
bolt
Spring washer
Hex nut
Flat washer
Approx. 5 mm
(3/16")
Attachment plate
1) Attach the anchoring nuts or curled plugs to a
concrete ceiling and securely fix the four ceiling
mount bolts. (Refer to page 6 for attachment
positions.)
z When installing anchoring nuts or curled plugs,
strictly adhere to the installation instructions
supplied by the manufacturer of the nuts so that
they will not loosen in the concrete structure or
be dislodged from the intended positions.
z Check to make sure that the concrete ceiling
structure can easily bear the weight of the
projector and the ceiling mount bracket. If it is
found to be fragile or degraded, use steel or
wooden reinforcements.
2) Temporarily secure the attachment plate to the
ceiling mount bolts.
(It will be permanently secured after adjusting the
installation angle in horizontal directions on page 12.)
z The threaded end of ceiling mount bolt at
the attachment plate side should protrude by
approx. 5 mm (3/16") from the hex nut. Be sure
to use commercially available flat and spring
washers to install the attachment plate.
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