14 - ENGLISH
Installation (continued)
When the ceiling mount bolt installation location is concrete
Anchor nut or
curled plug
Flat washer
Hexagonal nut
Hexagonal nut
Ceiling mount bolt
Hexagonal nut
Hexagonal nut
Ceiling mount bolt
Flat washer
Spring washer
Spring washer
Flat washer
Flat washer
Spring washer
Spring washer
Indoor wiring hole (bracket side)
Terminal
block
Ceiling mount bracket
Protrudes 20 mm (25/32") to 30 mm (1-3/16")
*1
from the ceiling surface.
Ceiling board
Anchor nut or
curled plug
Concrete
*1 27 mm (1-1/16") to 30 mm (1-3/16") when two nuts
Hole for indoor wiring
1) Drill mounting holes in reference to “Mounting hole dimensions” (
11 page).
Drill anchor nut or curled plug mounting holes to match the size speci
fi
ed by the manufacturer.
Drill two holes in the ceiling board for passing the ceiling mount bolts (M10) through and one hole in the
ceiling board for pulling the indoor wiring through.
2) Attach the two ceiling mount bolts to the concrete ceiling.
Attach the anchor nuts or curled plugs to the concrete ceiling and securely
fi
x the two ceiling mount bolts.
When installing anchor nuts or curled plugs, strictly adhere to the installation instructions supplied by the
manufacturer so that they will not come out or loosen, or be dislodged from the intended positions.
If the ceiling concrete has become weak and fragile or may have degraded as a result of being old,
reinforce it with iron or wood.
3) Pull out the indoor wiring for the power supply from the ceiling.
Pull out the indoor wiring for the power supply from the indoor wiring hole you drilled in the ceiling board.
4) Attach the ceiling mount bracket to the ceiling mount bolts.
Pass the indoor wiring for the power supply through the indoor wiring hole of the ceiling mount bracket and
then securely
fi
x the ceiling mount bracket to the ceiling mount bolts.
The ends of ceiling mount bolts at the ceiling mount bracket side should protrude by approx. 5 mm (3/16")
from the hexagonal nuts.
Make sure the distance from the surface of the ceiling mount bracket to the end of the ceiling mount bolts
is within 30 mm (1-3/16"). If the distance is too long, the projector mount bracket will not be able to be
attached.
Be sure to use commercially available
fl
at washers and spring washers to install the ceiling mount bracket.
Attention
Tighten the hexagonal nuts
fi
xing the ceiling board and ceiling mount bracket together while considering the
strength of the ceiling board material. If the ceiling board material is of low strength, the ceiling board may
be damaged if the nuts are tightened to the speci
fi
ed torque. Also take a measure such as using two nuts or
thread-locking
fl
uid to prevent loosening of the hexagonal nuts.
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