Acer X1111 - Manual (Page 49)

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English
3 Use the appropriate number of screws for the projector size to attach the
projector to the ceiling mount bracket.
Note: It is recommended that you keep a reasonable space
between the bracket and the projector to allow for proper heat
distribution. Use two washers for extra support, if deemed
necessary.
4 Attach the ceiling bracket to the ceiling rod.
Smaller Washer
Large Washer
Projector Bracket
Supports projector and
allows for adjustments
Screw Type B
Spacer
- For heat dissipation
Screw Type A
50 mm length -
/8 mm diameter
Large Cylinder Cap
Allen Key
- For tighten/loosen
Tightening Screw