Identifying The Airflow Direction - IBM SAN128B-7 Installation, Service And User Manual

Note: The equipment installation must meet NEC/CEC code requirements. Consult local authorities for
regulations.
Note: If the ambient temperature is above the recommended operational limits, the power supply units
shutdown, which in turn shuts down the device without any warning message.

Identifying the airflow direction

The power supply and fan assemblies are identified by the following airflow directions:
• Intake power supply and fan assembly with an orange "I" label or without any label: Pulls air from
the nonport-side of the switch and exhausts it out the port side.
• Exhaust power supply and fan assembly with a green "E" label: Pulls air from the port side of the
switch and exhausts it out the nonport-side.
56 IBM Storage Networking SAN128B-7: SAN128B-7 Installation, Service, and User Guide
DANGER:
If the installation requires a different power cord than the one supplied
with the device, make sure you use a power cord displaying the mark of the
safety agency that defines the regulations for power cords in your country.
The mark is your assurance that the power cord can be used safely with the
device.
CAUTION:
Disassembling any part of the power supply and fan assembly voids the
warranty and regulatory certifications. There are no user-serviceable parts
inside the power supply and fan assembly.
CAUTION: Ensure that the airflow direction of the power supply unit
matches that of the installed fan tray. The power supplies and fan trays
are clearly labeled with either a green arrow with an "E", or an orange arrow
with an "I."
CAUTION: If you do not install a module or a power supply in a slot, you
must keep the slot filler panel in place. If you run the chassis with an
uncovered slot, the system will overheat.
CAUTION: Use a separate branch circuit for each power cord, which
provides redundancy in case one of the circuits fails.
CAUTION: To prevent damage to the chassis and components, never
attempt to lift the chassis using the fan or power supply handles. These
handles were not designed to support the weight of the chassis.
– Nonport-side air intake
– Port-side air exhaust
– Back-to-front (nonport-side to port-side)
airflow
– Part numbers ending with -R