Cisco Systems 8-Slot User Manual download pdf (Page 88)

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Cisco CRS Carrier Routing System 8-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 3-1 Airflow Through the Cisco CRS 8-Slot Line Card Chassis

The Cisco CRS 8-slot line card chassis airflow volumes are:

• Chassis airflow: Up to 900 cubic feet (25,485 liters) per minute

• Power system airflow: Up to 240 cubic feet (6,800 liters) per minute

How to Install or Remove Air Circulation Components

This section contains the following procedures:

• Installing a Lower Fan Tray, page 3-2

• Installing a Rear Exhaust Screen, page 3-4

• Removing a Lower Fan Tray, page 3-5

• Installing an Upper Fan Tray, page 3-7

• Removing an Upper Fan Tray, page 3-8

• Installing the Chassis Air Filter, page 3-9

• Removing the Chassis Air Filter, page 3-11

• Installing a Power Module Air Filter, page 3-12

• Removing a Power Module Air Filter, page 3-13

Installing a Lower Fan Tray

This section describes how to install a fan tray in the lower fan tray slot of the Cisco CRS 8-slot line card

chassis. For information on the chassis airflow and circulation, see the “About Line Card Chassis

Airflow” section on page 3-1. For complete information on regulatory compliance and safety, see

Regulatory Compliance and Safety Information for the Cisco CRS Carrier Routing System.

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Fan

Air enters

PLIM side

Power system

Fan

Air exits MSC and

fabric card side

Front Rear

Air filter

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Cisco Systems 8-Slot User Manual Page 88