Bridge/Router Installation Guide

3-3

Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide

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Chapter 3 Installing and Removing Air Circulation Components

How to Install or Remove Air Circulation Components

Figure 3-2 System Air Filters

Note We recommend that you check the air filters once a month. Replace a filter when you notice a significant

amount of dust.

Caution To remain NEBS compliant, the chassis air filter can be replaced only when the fan trays are not running.

The Cisco CRS-1 4-slot line card chassis airflow volumes are as follows:

• Chassis airflow: Up to 880 cubic feet (24,919 liters) per minute

• Power system airflow: Up to 60 cubic feet (1699 liters) per minute

How to Install or Remove Air Circulation Components

This section contains the following procedures:

• Installing a Fan Tray

• Removing a Fan Tray

• Installing the Chassis Air Filter

• Removing the Chassis Air Filter

• Installing a Power Tray Air Filter

• Removing a Power Tray Air Filter

1 Chassis air filter 3 Power tray and power supplies

2 Air intake grille 4 Power tray air filter

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