Dell Force10 S4820T Installing the S4820T System - Page 19

Fan Combinations, Power, Storing Components

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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). Site Location and Preparation | 19

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Site Location and Preparation
|
19
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).