11INSTALLATION WarningThis installation should be made by qualified service personnel or system installers. NotesPlaces to avoid• Direct exposure to sunlight or near a source of heat such as a radiator.• Very dirty and dusty places. Places subject to strong vibrations.• Near a transformer, dimmer, video player, radio or monitor. These may cause humming noise, etc.About mounting• Do not block the ventilation openings or slots in the cover to prevent the appliance from overheating.• Always keep the temperature in the rack within +45 °C (113 °F).• Secure the rear of the appliance to the rack with additional mounting brackets (procured locally), if the rack is subject tovibration. Installing the Optional HDDThere is an extension space inside the recorder to mountthe optional HDD unit, besides the one unit pre-installedwhen shipped.1. Unplug the power cord from the AC outlet.2. Remove nine screws to detach the top cover.You will see the additional HDD bracket adjacent to thepre-installed HDD unit.3. Remove six screws fastening the additional bracket.4. Disconnect the two fan cord connectors on the mainboard, and unfasten the cord clamps to separate thecords individually. Then, remove the bracket from thechassis.5. Prepare the optional HDD unit.5-1 Attach the supplied serial number label and trans-parent seal on the HDD unit surface as illustrated.5-2 Set the jumper connectors as illustrated.Note: Pin connector settings may differ depending onthe HDD unit. Refer to INSTRUCTIONS includedwith the HDD for master-slave connector settings.48372615–Digital Disk Recorder WJ-HD20848372615–Digital Disk Recorder WJ-HD208