Rack Mounting; System Ground; Fans And Airflow; Fan Combinations - Dell Networking S4048 Installation Manual

The cabinet must meet minimum size requirements. Airflow must be in accordance with the Electronic Industries Alliance (EIA) standard.
Ensure that there is a minimum of 5 inches (12.7 cm) between the intake and exhaust vents and the cabinet wall.

Rack mounting

When you prepare your equipment rack, ensure that the rack is grounded.
Ground the equipment rack to the same ground point the power service in your area uses. The ground path must be permanent.

System ground

Dell recommends you ground you system. Use the S4048–ON in a common bond network (CBN).
Connect the grounding cables as described in

Fans and airflow

The S4048–ON fans support two airflow options.

Fan combinations

The S4048-ON 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 the I/O-side to the PSU-side
• AC PSU with fan airflow from the PSU-side to the I/O-side
Be sure to order the fans suitable to support your site's ventilation. Use a single type of airflow fan in your system. Do not mix reverse and
normal air flows in a single S4048–ON chassis.
For proper ventilation, position the S4048-ON in an equipment rack (or cabinet) with a minimum of 5 inches (12.7 cm) of clearance around
the exhaust vents. When you install two S4048-ON systems near each other, position the two chassis at least 5 inches (12.7 cm) apart to
permit proper airflow. The fan speed increases when the internal temperature reaches 161.6°F (72°C) and decreases to normal speed
when the temperature falls to 136.4°F (58°C). The S4048-ON never intentionally turns off the fans.

Power

To connect the chassis to the applicable power source, use the appropriate power cord with the S4048–ON. An AC power cord 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 when 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. Ensure that the socket-outlet is located/
installed near the equipment and is easily accessible.

Storing components

If you do not install your S4048–ON and components immediately, Dell recommends properly storing the system and all optional
components by following these guidelines.
• Storage location temperature must remain constant ranging from -40° to 158°F (from -40°C to 70°C).
Install the S4048–ON.
Site preparations 13