Extreme Networks ExtremeSwitching X440-G2 Series Hardware Installation Manual page 301

6 If a replacement power supply will not be installed, install a cover over the unoccupied power supply
bay.
Note
Unoccupied power supply bays must always be covered to maintain proper system
ventilation and EMI levels.
Install a Replacement 1100 W DC Power Supply
To install a replacement 1100 W DC power supply unit (PSU), follow these steps:
1 Verify that the replacement power supply is oriented the same as the one you removed.
2 Verify that the direction of ventilation airflow is the same for both the power supply and the switch.
In a switch with front-to-back airflow, the fan modules are labeled Air Out.
In a switch with back-to-front airflow, the fan modules are labeled Air In.
3 Carefully slide the power supply all the way into the power supply bay.
See Figure 240.
Figure 240: Installing an 1100 W DC Power Supply
4 Push the power supply in until the latch snaps into place.
Caution
Do not slam the power supply into the switch.
5 Reconnect the ground wire as described in
on page 302.
ExtremeSwitching and Summit Switches: Hardware Installation Guide
Connect the Ground Wire to an 1100 W DC Power Supply
Replacing DC Power Supplies
301