Installation Guide

Replacing a Summit 850 W DC Power Supply
You need the following tools and materials to replace a Summit 850 W DC power supply:
• #1 Phillips screwdriver
• Torque screwdriver and wrench or torque driver with attachments for tightening screws and nuts
• Thermal protective gloves (required for removal of a power supply)
Warning
Be sure to disconnect all power cables before you disconnect the chassis ground wire.
Removing an 850 W DC Power Supply
To remove an installed Summit 850 W DC power supply, follow these steps:
1. De-energize the DC circuit.
2. Disconnect the DC power cables:
a. Pull the cover o the terminal block.
b. Loosen the screws that secure the cable terminals to the terminal block.
c. Slide the wires out from under the captive washers.
Warning
Be sure to disconnect all power cables before you disconnect the chassis ground wire.
3. Disconnect the ground wire:
a. Remove the screw that secures the ground wire to the power supply.
b. Move the wire away from the power supply.
4. Push the latching tab toward the power supply handle and pull outward on the handle to disengage
the power supply internal connectors.
See Figure 421.
SH _113
Figure 421: Removing a Summit 850 W DC Power Supply
5. Carefully slide the power supply the rest of the way out of the switch.
Replacing a Summit 850 W DC Power Supply
Replacing DC Power Supplies
484 Summit Family Hardware Installation Guide