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When planning your site layout and equipment locations, follow the precautions
described below to help avoid equipment failures and reduce the possibility of
environmentally caused shutdowns. If you are experiencing shutdowns or
unusually high errors with your existing equipment, these precautions may help
you isolate the cause of the failures and prevent future problems.
• Electrical equipment generates heat. Natural air temperature might not be
sufficient to cool equipment to acceptable operating temperatures without an
additional circulation system. Ensure that the room in which you operate
your system has adequate air circulation.
• Do not work alone if potentially hazardous conditions exist.
• Never assume that the power supply has been disconnected from a circuit.
Always check.
Look carefully for possible hazards in your work area, such as moist floors,
ungrounded power extension cables, frayed power cords, and missing safety
grounds.
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The following information will help you plan an acceptable equipment rack
configuration.
• Enclosed racks must have adequate ventilation. Ensure that the rack is not
overly congested because each unit generates heat. An enclosed rack should
have louvered sides and a fan to provide cooling air.
• When mounting a chassis in an open rack, ensure that the rack frame does
not block the intake or the exhaust ports. If the chassis is installed on slides,
check the position of the chassis when it is seated all the way into the rack.
• In an enclosed rack with a ventilation fan in the top, excessive heat
generated by equipment near the bottom of the rack can be drawn upward
and into the intake ports of the equipment above it in the rack. Ensure that
you provide adequate ventilation for equipment at the bottom of the rack.
• Baffles can help to isolate exhaust air from intake air, which also helps to
draw cooling air through the chassis. The best placement of the baffles
depends on the airflow patterns in the rack, which can be found by
experimenting with different arrangements.
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