Extreme Networks ExtremeSwitching X440-G2 Series Hardware Installation Manual page 295

4 Push the latching tab toward the power supply handle and pull outward on the handle to disengage
the power supply internal connectors.
Figure 234: Removing a Summit 750 W Power Supply
5 Carefully slide the power supply the rest of the way out of the switch.
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 750 W DC Power Supply
To install a replacement 750 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.
ExtremeSwitching and Summit Switches: Hardware Installation Guide
Replacing DC Power Supplies
295