4PREFACE < RZ31K/RS30K>Chapter 1 Preparation — Precautions for userDo not use the projector in a location that the ambient temperature exceeds 50 °C(122 °F).Using the projector in a location that the altitude is too high or the ambient temperature is too high may reduce thelife of the components or result in malfunctions.The upper limit of the operating environment temperature differs depending on the altitude or the setting of the[PROJECTOR SETUP] menu → [OPERATION SETTING] → [OPERATING MODE].Altitude above sea levelSetting for [OPERATING MODE][HIGH], [NORMAL], [USER1], [USER2],[USER3] [LONG LIFE1], [LONG LIFE2], [LONG LIFE3]Altitude of 0 m (0') or higherto lower than 1 400 m(4 593')0 °C (32 °F) to 50 °C (122 °F)0 °C (32 °F) to 45 °C (113 °F)Altitude of 1 400 m (4 593')or higher to lower than2 700 m (8 858') 0 °C (32 °F) to 45 °C (113 °F)Altitude of 2 700 m (8 858')or higher to lower than4 200 m (13 780')The projector cannot be used.When the Smoke Cut Filter is used, the operating environment temperature should be between 0 °C (32 °F) and40 °C (104 °F) regardless of the [OPERATING MODE] setting. It cannot be used at an altitude of 1 400 m (4 593')or higher above sea level.rProjection in all 360° direction is possible.360° 360°360°360° vertically 360° horizontally 360° tilted(combination of vertical and horizontal)Cautions when setting up the projectorf Install the projector in a place or with a mount that can sufficiently tolerate the weight. The position of theprojected image may shift if the strength is not sufficient.f Use the adjustable feet only for the floor standing installation and for adjusting the angle. Using them for otherpurposes may damage the projector.f The adjustable feet can be removed if not needed in the installation. However, do not use the screw holeswhere the adjustable feet were removed to fix the projector to a mount.Also, do not insert any screws other than the eyebolts for the installation work into the screw holes of theadjustable feet. Do not insert the removed adjustable feet into other M10 screw holes.f Do not fix the projector to a mount with the screw holes for eyebolts (4 locations on each side) on the top side,right and left sides, and back side.f When installing and using the projector in a method other than the floor installation using the adjustable feet,remove the adjustable feet (4 locations) and use the six screw holes to fix the projector to a mount (as shown inthe figure).ENGLISH - 17rThe projector may not work properly due to strong radio wave from the broadcaststation or the radio.If there is any facility or equipment which outputs strong radio waves near the installation location, install theprojector at a location sufficiently far from the source of the radio waves. Or, wrap the LAN cable connected to the terminal using a piece of metal foil or a metal pipe which is grounded at both ends.rFocus adjustmentThe high clarity projection lens is thermally affected by the light from the light source, making the focus unstable inthe period just after switching on the power. It is recommended that images be projected continuously for at least30 minutes before the focus is adjusted.rDo not install the projector at an altitude of 4 200 m (13 780') or higher above sea level.