Chapter 1 Preparation — Precautions for useENGLISH - 19f When installing the projector with a method other than the floor installation using the adjustable feet or theceiling installation, use the five screw holes for ceiling mount (as shown in the figure) to fix the projector to themount.(Screw diameter: M6, tapping depth inside the projector:15 mm (19/32"), torque: 4 ± 0.5 N·m)In such case, make sure that there is no clearance between the screw holes for ceiling mount on the projectorbottom and the setting surface by inserting spacers (metallic) between them.Screw holes for ceiling mount(M6)Adjustable feetPositions of screw holes for ceiling mount andadjustable feetf Do not stack projectors on top of each other.f Do not use the projector supporting it by the top.f Do not block the ventilation ports (intake and exhaust) of the projector.f Prevent hot and cool air from the air conditioning system to blow directly to the ventilation ports (intake andexhaust) of the projector.100 mm (3-15/16") or longer500 mm (19-11/16") or longer 500 mm (19-11/16") or longer500 mm (19-11/16") or longerf Do not install the projector in a confined space.When installing the projector in a confined space, provide air conditioning or ventilation separately. Exhaust heatmay accumulate when the ventilation is not enough, triggering the protection circuit of the projector.SecurityWhen using this product, take safety measures against the following incidents.f Personal information being leaked via this productf Unauthorized operation of this product by a malicious third party