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2 xSeries 343 Hardware Maintenance Manual
Notes
Only use a screwdriver tip to push in the lock tabs on the rack slides. A
pinch hazard exists if figners 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
theDCsourceandtheserver. TheserverisdesignedforaDClinevoltage
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.