112. Installation and ConnectionsWARNING* Installing your projector on the ceiling must be doneby a qualified technician. Contact your NEC dealerfor more information.* Do not attempt to install the projector yourself.• Only use your projector on a solid, level surface. Ifthe projector falls to the ground, you can be injuredand the projector severely damaged.• Do not use the projector where temperatures varygreatly. The projector must be used at temperaturesbetween 41˚F (5˚C) and 104˚F (40˚C). ([ECO MODE]is set automatically to [ON] at 95°F to 104°F/35°Cto 40°C. Note that [ECO] mode will be set to [ON]automatically at 86°F to 104°F/30°C to 40°C whenused in [HIGH ALTITUDE].)• Do not expose the projector to moisture, dust, orsmoke. This will harm the screen image.• Ensure that you have adequate ventilation aroundyour projector so heat can dissipate. Do not coverthe vents on the side or the front of the projector.Reflecting the ImageUsing a mirror to reflect your projector's image enablesyou to enjoy a much larger image when a smaller spaceis required. Contact your NEC dealer if you need a mirrorsystem. If you're using a mirror system and your imageis inverted, use the MENU and buttons on yourprojector cabinet or your remote control to correct theorientation. (→ page 67)