IBM manual XSeries 343 Hardware Maintenance Manual

Models: 343

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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 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.

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xSeries 343 Hardware Maintenance Manual

Page 14
Image 14
IBM manual XSeries 343 Hardware Maintenance Manual