IBM @server xSeries 343 Product Manual page 20

Ibm @server xseries 343 server product guide
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CAUTION
Make sure that the rack is secured properly to avoid tipping when the server unit is
extended.
Notes
Only use a screwdriver tip to push in the lock tabs on the rack slides. A pinch
hazard exists if fingers are used for this purpose.
DC Power supplies are installed: The DC source must be electrically isolated
by double or reinforced insulation from any hazardous DC source. The DC
source must be capable of providing up to 350 W of continuous power per feed
pair. Connection with a DC source should only be performed by trained service
personnel.
Mains DC power disconnect: You are responsible for installing a DC power
disconnect for the entire rack unit. This mains disconnect must be readily
accessible, and it must be labeled as controlling power to the entire unit, not just
to the servers(s).
Grounding the rack installation: To avoid the potential for an electrical
shock hazard, you must include a third wire safety ground conductor with the
rack installation. The safety grounding conductor must be a minimum 14AWG
connected to the earth ground stud on the rear of the server. The safety ground
conductor should be connected to the chassis stud with a two hole crimp
terminal with a maximum width of 0.25 inch. The nuts on the chassis studs
should be installed with a 10 in/lbs torque. The safety ground conductor
provides proper grounding only for the server. You must provide additional,
proper grounding for the rack and other devices installed in it.
Overcurrent protection: Overcurrent protection circuit breakers must be
provided as part of each host equipment rack and must be installed between the
DC source and the server. The server is designed for a DC line voltage power
source with up to 10 amperes of overcurrent protection per feed pair. If the DC
power system for the equipment rack is installed with more than 10 amperes of
protection, you must provide supplemental protection for the server. The
overall current rating of a server configured with two power supplies is less than
7 amperes.
Temperature: The temperature in which the server operates when installed in
an equipment rack, must not go below 5 °C (41 °F) or rise above 40 °C
(104 °F). 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. The rack must also include ventilation
sufficient to exhaust a maximum of 1023 BTUs 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.
8
Safety

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