IBM TotalStorage SAN140M, Installation And Service Manual

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xxv Preface
Rack-mount safety
information
Danger
Always lower the leveling pads on the rack cabinet.
Always install stabilizer brackets on the rack cabinet.
To avoid hazardous conditions due to uneven mechanical
loading, always install the heaviest devices in the bottom of the
rack cabinet. Always install servers and optional devices starting
from the bottom of the rack cabinet.
Rack-mounted devices are not to be used as a shelf or work space.
Do not place any object on top of rack-mounted devices.
Each rack cabinet might have more than one power cord. Be sure
to disconnect all power cords in the rack cabinet before servicing
any device in the rack cabinet.
Connect all devices installed in a rack cabinet to power devices
installed in the same rack cabinet. Do not plug a power cord from
a device installed in one rack cabinet into a power device installed
in a different rack cabinet.
An electrical outlet that is not correctly wired could place
hazardous voltage on the metal parts of the system or the devices
that attach to the system. It is the responsibility of the customer to
ensure that the outlet is correctly wired and grounded to prevent
an electrical shock.
Caution
Do not install a unit in a rack where the internal rack ambient
temperatures will exceed the manufacturer’s recommended
ambient temperature for all your rack-mounted devices.
Do not install a unit in a rack where the air flow is compromised.
Ensure that air flow is not blocked or reduced on any side, front,
or back of a unit used for air flow through the unit
Consideration should be given to the connection of the
equipment to the supply circuit so that overloading of the circuits
does not compromise the supply wiring or overcurrent
protection. To provide the correct power connection to a rack,
refer to the rating labels located on the equipment in the rack to
determine the total power requirement of the supply circuit.