NEC HT510 HT510_510 UM - Page 23

2. INSTALLATION AND CONNECTIONS Throw Distance and Screen Size The following shows the proper relative positions of the projector and screen. Refer to the table to determine the position of installation. Distance Chart Screen Width Screen Height Screen Diagonal Screen center (B) Screen Bottom Lens Center Throw Angle (α) Throw Distance (C) B = Vertical distance between lens center and screen center C = Throw distance α = Throw angle NOTE: Distances may vary +/-5%. WARNING * Installing your projector on the ceiling must be done by a qualified technician. Contact your NEC dealer for more information. * Do not attempt to install the projector yourself. • Only use your projector on a solid, level surface. If the projector falls to the ground, you can be injured and the projector severely damaged. • Do not use the projector where temperatures vary greatly. The projector must be used at temperatures be- tween 41˚F (5˚C) and 95˚F (35˚C). • Do not expose the projector to moisture, dust, or smoke. This will harm the screen image. • Ensure that you have adequate ventilation around your projector so heat can dissipate. Do not cover the vents on the side or the front of the projector. Rear Projection Applications The projector has the ability to be used in a rear projection application. When used with a third party mirror and frame system, rear projection allows you to achieve a larger image size in less distance than a traditional front projection installation. If space constraints exist, please contact your authorized NEC reseller regarding a rear projection solution. Refer to page E-38 on how to change the projector orientation for use in a rear projection application. E-12