Acer P1223 - Manual (Page 52)

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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.
Screw Type B
Smaller Washer
Large Washer
Projector Bracket
Supports projector and allows -
for adjustments
Spacer
- For heat dissipation
Large cylinder cap
Tightening Screw
Allen Key
- For tightening/loosening
Screw Type A
50 mm length -
08 mm diameter