Installation guide

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BlackDiamond 20808 Switch Hardware Installation Guide
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Temperature
Extreme Networks equipment generates a significant amount of heat. It is essential that you provide a
temperature-controlled environment for both performance and safety.
Install the equipment only in a temperature- and humidity-controlled indoor area that is free of airborne
materials that can conduct electricity. Too much humidity can cause a fire. Too little humidity can
produce electrical shock and fire.
Follow these general thermal recommendations for your wiring closet:
● Be sure that the ventilation in the wiring closet is adequate to maintain a temperature below 104° F
(40° C).
● Install a reliable air conditioning and ventilation system.
● Keep the ventilation in the wiring closet running during non-business hours; otherwise, the
equipment can overheat.
● Maintain an ambient operating temperature of 32° to 104° F (0° to 40° C).
NOTE
Short-term operation is permitted at –5°C to 0°C and 40°C to 55°C, for no more than 96 consecutive hours and
a total of not more than 15 days in 1 year.
● Maintain a storage temperature of -40° to 158° F (-40° to 70° C).
NOTE
As with all electrical equipment, Extreme Networks product lifetimes degrade with increased temperature. If
possible, temperatures should be kept at approximately 78° F (25° C) or lower.
Chassis Airflow Requirements
To ensure proper airflow through a BlackDiamond switch, follow these recommendations:
● BlackDiamond 20808 switches require a minimum of 15 inches (38 cm) at the rear of the chassis from
any cabinet wall or other obstruction for proper airflow to the switch fabric modules. If you install
the BlackDiamond 20808 switch in a cabinet, do not use the rear cabinet door unless there is at least
12 inches (30.5 cm) of unobstructed space behind the switch.
● Install the PSU air baffles on the chassis to direct airflow from the PSU fans away from adjacent
equipment.
● If you install the BlackDiamond 20808 switch in a 4-post equipment rack, make sure that the rear
rack posts do not obstruct airflow to the power supplies. The distance from the front of the chassis to
the PSU vents is 22 inches (56 cm). Allow a minimum of 5 inches (12.7 cm) of clear space in front of
a front-opening PSU air baffle.
● Air temperature measured approximately 1 inch (2.5 cm) from the fan inlet should be less than
104 °F (40 °C).
In the BlackDiamond 20808 switch, air moves through the power supplies independently of the airflow
through the front-installed modules and the XFM-1 modules in the back (see Figure 9). In addition, the
XFM-1 modules have internal fans that cool these modules independently of the rest of the switch.