Extreme Networks Extreme 7520 Series Hardware Installation Manual page 61

Install the Switch
All installed power supplies must have the same airflow direction (front-to-back or
back-to-front) and must match the airflow direction of the installed fan modules.
Warning
To prevent an electrical hazard, make sure that the AC power cord is not
connected to the power supply before you install the power supply in the
power supply bay.
Warning
Make sure that the AC power supply circuit is not overloaded. Use proper
over-current protection, such as a circuit-breaker, to prevent over-current
conditions.
1. If necessary, remove a blank panel from the back of the switch.
2. Verify that the new power supply is right side up.
3. Verify that the new power supply's airflow direction (front-to-back or back-to-front) is
compatible with the other installed power supply (if any) and with the installed fan
modules.
4. Carefully slide the power supply all the way into the power supply bay (see
28).
Install an 800 W Internal AC Power Supply
Extreme 7520 Hardware Installation Guide
Figure
61