Installation guide

BlackDiamond 20808 Switch Hardware Installation Guide
101
10 Replacing Ventilation and Airflow Components
This chapter describes how to replace fan trays, air filters, and PSU air baffles in the BlackDiamond
20808 Chassis.
This chapter includes the following sections:
● Replacing a Fan Tray on page 101
● Replacing a Chassis Air Filter on page 105
● Replacing an Air Filter in an XFM-1 Switch Fabric Module on page 107
● Replacing a PSU Air Baffle on page 108
Required Tools
You need the following tools to replace ventilation and airflow components in the BlackDiamond 20808
switch:
● ESD-preventive wrist strap (for fan tray only)
● # 2 Phillips screwdriver
● # 1 Phillips screwdriver for adjusting the side rails on a rear-installed fan tray
● Thermal protective gloves for handling PSU air baffles
Replacing a Fan Tray
The BlackDiamond 20808 switch is cooled by two fan trays, each containing 12 fans. The front fan tray
is immediately below the management modules and I/O modules. The rear fan is above the switch
fabric modules.
You can replace one fan tray without powering down the switch.
Make sure you have the replacement fan tray ready before you begin the replacement procedure.
Replacing the Front Fan Tray
To replace the front fan tray:
1 Attach the ESD-preventive wrist strap to your bare wrist and connect the metal end to the ground
receptacle above slot 8.
2 Remove the failed fan tray:
a Loosen the captive retaining screws on the failed fan tray (Figure 67).
b Wait at least 30 seconds for the fans to slow their rotation.
CAUTION
Be careful to keep your fingers away from the rotating fan blades as you remove the fan tray from the chassis.