Dell Force10 S55 Manual - Página 31

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Fans

The S55 comes from the factory with 1 power supply and 2 fan modules installed in the chassis. Both the

fan module and the integrated fan-power supply are hot-swappable if a second (redundant) power supply

is installed and running. With redundant power supplies, traffic will not be interrupted if a fan module is

removed.

NOTE: Both slots must have operating fan units to run the system. If a module is not installed in each slot the

system will shut down in 1 minute.

In addition to the integrated fan/power supply modules, fan modules can be ordered separately and

additional modules can be inserted in the chassis.

The S55 supports two airflow direction options. Only a single direction can be used in a chassis; do not

mix fan flow types in a chassis. The system will shutdown in 1 minute, if the airflow directions are

mismatched.

• Normal is airflow from I/O panel to power supply

• Reversed is airflow from power supply to I/O panel

There are environmental factors that could decrease the amount of time required between fan

replacements. Check these environmental factors regularly. Any unusual environmental circumstance at

the site that causes an increase in temperature and/or particulate matter in the air might affect

performance (for example, new equipment installation).

CAUTION: Fans should be checked at six-month intervals and replaced as necessary. Regularly monitor the

speeds of the cooling fans in order to accurately determine replacement intervals.

CAUTION: For NEBS compliance, use the NEBS approved filters. These filters are colored green, and are

installed exactly the same as the non-NEBS filters.

Components

CAUTION: Fans should be checked at six-month intervals and replaced as necessary. Regularly monitor the

speeds of the cooling fans in order to accurately determine replacement intervals.

• S55 Fan module (Catalog# S55-FAN)

• S55 Fan module - Reverse flow (Catalog# S55-FAN-R)

Install a fan module

The fan modules in the S55 are field replaceable. The power supply units are in a single piece with fans,

but individual fans are available. Refer to

entire power supply.

Module Slot 0 is on the left; Module Slot 1 is on the right.

Chapter 5, Power Supplies

for the procedure to replace the

Fans