NEC SA2500, User Manual

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User Guide
76
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Warning
■
A
NCHOR 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.
■
M
AIN
AC
POWER DISCONNECT
: You are responsible for install-
ing 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).
■
G
ROUNDING 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.
Caution
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 com-
monly spaced in a 5/8 x 5/8 x 1/2-inch sequence. Perform the
following steps carefully; brackets must be mounted with preci-
sion to allow room for the next server you install in a rack.