User`s guide

User Guide
56
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Caution: When planning your system configuration for the rack cabinet you should
consider the length of the cables that interconnect system components.
• Anchor the equipment rack: The equipment rack must be anchored to
an unmovable support to prevent it from falling over when one or more
servers are extended in front of it on slide assemblies. The anchors must
be able to withstand a force of up to 113 kg (250 lbs). You must also
consider the weight of any other device installed in the rack.
• Main AC power disconnect: You are responsible for installing an AC
power disconnect for the entire rack unit. This main disconnect must be
readily accessible, and it must be labelled as controlling power to the
entire unit, not just to the server(s).
• Grounding the rack installation: To avoid the potential for an electrical
shock hazard, you must include a third wire safety grounding conductor
with the rack installation. If a server power cord is plugged into an AC
outlet that is part of the rack, then you must provide proper grounding
for the rack itself. If server power cords are plugged into wall AC
outlets, the safety grounding conductor in each power cord provides
proper grounding only for the server. You must provide additional,
proper grounding for the rack and other devices installed in it.
• Temperature: The operating temperature of the server, when installed
in an equipment rack, must not go below 5 °C or rise above 35 °C.
Extreme fluctuations in temperature can cause a variety of problems in
your server.
• Ventilation: The equipment rack must provide sufficient airflow to the
front of the server to maintain proper cooling. It must also include
ventilation sufficient to exhaust a maximum of 4,100 Btu's per hour for
the server. The rack selected and the ventilation provided must be
suitable to the environment in which the server will be used.
Note: For vertical reference, every three screw holes on the rack vertical mounting
rail are equal to 1U (1.75 inches).
Mounting holes in the vertical rails of equipment racks are commonly spaced
in a 5/8 x 5/8 x 1/2-inch sequence. Perform the following steps carefully;
brackets must be mounted with precision to allow room for the next server
you install in a rack.