Removing An Ac Power Shelf - Cisco Carrier Routing System CRS-1 Installation Manual

Removing an AC Power Shelf

Steps
To install an AC power shelf, use
Step 1 Attach the ESD-preventive wrist strap to your wrist and connect its leash to one of the ESD connection
sockets on the front (PLIM) side of the chassis or a bare metal surface on the chassis.
Step 2 Remove the air intake grille from the bottom of the chassis.
Step 3 Holding the AC power shelf underneath with one hand and steadying it with the other, lift the shelf up
and slide it partway into the power shelf slot on the front (PLIM) side of the chassis. Be sure to center
the shelf in the slot when you slide it in.
Caution
Slide the AC power shelf fully into the chassis. Be sure that the lever handles are aligned with the lever
Step 4
handle catches on the chassis casing.
Caution
Lift the lever handles up to lock the tray into position.
Step 5
Use the flat-blade screwdriver to turn the two captive screws that connect the rear of the chassis to the
Step 6
power shelf, and tighten them fully.
Caution
What to Do Next
After performing this task, install the power supplies (see the
page

Removing an AC Power Shelf

This section describes how to remove an AC power shelf from the Cisco CRS 4-slot line card chassis.
The AC power shelf encloses four power supplies and the power distribution connections and wiring.
The AC power shelf is installed in the front (PLIM) side of the chassis. For more details on the power
systems see the
complete information on regulatory compliance and safety, see Cisco CRS Carrier Routing System
Regulatory Compliance and Safety Information.
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
2-26
An empty AC power shelf weighs about 7.0 lb (3.2 kg). To prevent injury when lifting the
shelf, keep your back straight and lift with your legs, not your back. Avoid sudden twists or
lateral moves.
When inserting the power shelf, carefully guide the shelf in to prevent the power switch from
hitting the edge of the power shelf opening. If possible, have a second person guide the power
shelf from the rear of the unit.
Be sure to attach the plugs carefully; incorrectly attached plugs can damage the chassis.
2-28), and replace any chassis cosmetic cover plates.
"About Installing and Removing the Power Components" section on page
Chapter 2
Figure 2-23 as a reference and follow these steps:
Installing and Removing Power Components
"Installing a Power Supply" section on
2-1. For
OL-10971-10