Fan Combinations; Power; Storing Components - Dell Force10 S4810P Manual

Fan Combinations

The S4820T has stock keeping units (SKUs) that support the following configurations. Installation of the
fans is done as part of the factory install based on SKU type.
• AC PSU with fan airflow from I/O to PSU
• AC PSU with fan airflow from PSU to I/O
• DC PSU with fan airflow from I/O to PSU
• DC PSU with fan airflow from PSU to I/O
All fans and PSUs in a configuration must be in the same airflow direction. Should a mixed airflow
configuration happen, the software will notify you of the invalid configuration.
For proper ventilation, position the S4820T in an equipment rack (or cabinet) with a minimum of
five inches (12.7cm) of clearance around the exhaust vents. When you install two S4820T systems near
each other, position the two chassis at least five inches (12.7cm) apart to permit proper airflow.The fan
speed increases when the internal temperature reaches 72°C and decreases to normal speed when the
temperature falls to 58°C. The S4820T never intentionally turns off the fans.
Use the show logging command to see the log messages. For more information, refer to the System Logs
chapters of the FTOS Command Ling Reference Guide for the S4820T System and FTOS Configuration
Guide for the S4820T System.

Power

Use the appropriate power cord with the S4820T system to connect the chassis to the applicable power
source.
• If the switch is an AC model, an AC power cord (country/region specific) is included with the system.
• If the switch is a DC model, a DC power cord (country/region specific) is included with the system.
When installing AC systems, follow the requirements of the National Electrical Code, ANSI/NFPA 70
where applicable.
The system is powered-up as soon as the power cord is connected between the system and the power
source.
CAUTION: Always disconnect the power cable before you service the power supply slots.
CAUTION: Use the power supply cord as the main disconnect device on the AC system. Make sure that the
socket-outlet is located/installed near the equipment and is easily accessible.

Storing Components

If you do not install your S4820T and components immediately, Dell Force10 recommends properly
storing the system and all optional components until you are ready to install them.
Follow these storage guidelines:
• Storage temperature must remain constant ranging from -4° to 158° F (-20°C to 70° C).
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