Extreme Networks 8820 Hardware Installation Manual page 60

Change Airflow Direction
Figure 31: Front-to-back airflow chassis position
Figure 32: Back-to-front airflow chassis position
4. Use a Phillips #1 screwdriver to tighten the chassis screw.
Figure 33: Chassis screw back-to-front position
5. Carefully slide the PSUs and fan modules back into the switch.
60 Extreme 8820 Hardware Installation Guide
Remove and Replace Components