H3C Technologies H3C WX5500E Series Access Controllers - Manual (Page 7)

1
Preparing for installation
Safety recommendations
Safety symbols
When reading this document, note the following symbols:
WARNING means an alert that calls attention to important information that if not understood or
followed can result in personal injury.
CAUTION means an alert that calls attention to important information that if not understood or
followed can result in data loss, data corruption, or damage to hardware or software.
General safety recommendations
To avoid any equipment damage or bodily injury caused by improper use, read the following safety
recommendations before installation. Note that the recommendations do not cover every possible
hazardous condition.
• Do not place the device on an unstable case or desk. The device might be severely damaged in
case of a fall.
• Make sure the ground is dry and flat and anti-slip measures are in place.
• Keep the chassis and installation tools away from walk areas.
• Keep the chassis clean and dust-free.
• Do not place the device near water or in a damp environment. Prevent water or moisture from
entering the device chassis.
• Ensure proper ventilation of the equipment room and keep the air inlet and outlet vents of the device
free of obstruction.
• Make sure the operating voltage is in the required range.
• Use a screwdriver to fasten screws.
• To prevent condensation, unpack the device at least half an hour after you move the device from a
location below 0°C (32°F) to the equipment room, and power on the device at least 2 hours after
you move the device from a location below 0°C (32°F) to the equipment room.
Electrical safety
• Carefully examine your work area for possible hazards, such as moist floors, ungrounded power
extension cables, or missing safety grounds.
• Locate the emergency power-off switch in the room before installation. Shut off the power
immediately if an accident occurs.
• Unplug all the external cables (including power cables) before moving the chassis.
• Do not work alone when you operate the device with the device powered on.