Installation guide

Meeting Site Requirements
BlackDiamond 20808 Switch Hardware Installation Guide
35
Figure 9: Air Flow Through the BlackDiamond 20808 Switch
NOTE
When the air baffles are attached to the PSU air vents on the chassis, they modify the air intake and outflow
through the PSU bays so that air is pulled from the direction of the chassis front and blown out toward the rear of
the chassis.
Space Requirements for the Switch
Provide enough space in front of and behind the switch so that you can service it easily (see Figure 10).
Minimum distances required for servicing and ventilation are as follows:
● At the back of the chassis:
■ Minimum of 29 inches (73.7 cm) for replacing the rear fan tray without adjusting the fan rails
(dimension A in Figure 10)
■ Minimum of 22 inches (56 cm) for replacing the rear fan tray if you collapse the fan rails
(dimension B in Figure 10)
■ Minimum of 15 inches (38 cm) at all times for proper ventilation and cooling of the XFM1 switch
fabric modules (dimension C in Figure 10)
● At the front of the chassis:
Minimum of 22 inches for replacing front-installed modules or the front fan tray
● At each side of the chassis:
Minimum of 4 inches at the rear side to allow ventilation of the PSUs
BD_225
1
2
3
1 = Air flow through the front-installed modules
2 = Air flow through the PSUs
3 = Air flow through the switch fabric modules