Cisco Systems ASR 903 manual Air Plenum, Dust Filter A903-FAN-F

Chapter 1 Cisco ASR 903 router Overview

Cisco ASR 903 router Features

Figure 1-5 Cisco ASR 903 Fan Tray with Dust Filter and Dummy Cover (A903-FAN-E)

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1	LEDs	4	Dummy cover
2	Alarm	5	Pull tab
3	Dust filter		—

Dust Filter (A903-FAN-F)

The dust filter (see Figure 1-5) on the fan tray is a quadrafoam 45PPI filter which is 85 percent dust resistant. A dummy cover (A903-FAN-F-B) secures the dust filter in the chassis. For installing the fan filter, see “Installing the Dust Filter” section on page 3-10.

Note Use the pull tab provided to easily access the filter.

Air Plenum

Air Plenum or air baffle assembly (see Figure 3-6) is used change the air flow pattern of the unit. When the router is installed with the plenum, the air flow pattern is changed from side-side to front-back. The air flow front-back pattern provides a rack installation bay with a cool front zone and hot rear zone. For installing the plenum, see “Installing the Chassis in the Air Plenum” section on page 3-4.

Note When the air plenum and the fan filter are installed in the chassis, the system operating temperature is 55 degrees Celsius.

Cisco ASR 903 Router Hardware Installation Guide

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