Optoma EP721 User's Manual - Page 53

Appendices Ceiling Mount Installation 1. To prevent damaging your projector, please use the Optoma's recommended mount package for installation. 2. If you wish to use a third party ceiling mount kit, please ensure the screws used to attached a mount to the projector met the following specifications:  Please note that damage resulting from incorrect installation will invalidate the warranty.  Screw type: M3  Maximum screw length: 10mm  Minimum screw length: 7.5mm Warning: 1. If you buy the ceiling mount from other company, please ensure that there is at least 10cm distance between the bottom cover of the projector and the ceiling. 2. Avoid placing the projector near sources of heat such as air-conditioning units and heaters, otherwise, it may overheat and shut down automatically. 53 English