Avici Systems Inc.

Field Replacement Procedure

QSR Air Filter

05406-00 Rev. BA

This procedure describes how to replace the air filter for the Quarter-rack Scalable Router (QSR).

Before beginning this procedure, carefully inspect the package to ensure that no damage occurred during shipping or delivery. If you suspect any possible damage to a field replacement unit, contact Customer Service immediately.

Support Services

Avici offers three ways to obtain information on customer service and training:

Replacing the Air Filter

The QSR has a removable air filter that screens out dust drawn into the system by the cooling modules. Clean or replace filters approximately every four weeks, more often in high dust areas. Damaged or worn filters prevent the proper air flow for cooling, which can cause an over-temperature condition.

Adhere to all caution and warning statements while performing filter maintenance.

Using the Antistatic Wrist Strap

Use a grounded antistatic wrist strap to protect the QSR chassis and components from damage caused by static electricity.

PROCEDURE: Use the following steps to attach the antistatic wrist strap:

Step 1 Remove the alligator clip from the grounding pin on the antistatic wrist strap.

Step 2 Insert the grounding pin into the electrostatic discharge (ESD) jack on the front or back of the QSR chassis (see Figure 1). Use the ESD jack closest to where you will be working.

Step 3 Put the other end of the wrist strap on your wrist.

Step 4 Keep the wrist strap connected to the ESD jack and on your wrist while handling any QSR components or modules.

Figure 1. Finding the ESD Jacks

Removing the Air Filter

The QSR system uses a UL listed 94H-1, UL 900 Class 2 Universal polyester air filter. The air filter snaps into place in a slot located under the cable management tray (see Figure 2 and Figure 3).

If at all possible, keep an extra filter on hand.

Figure 2. Universal Polyester Air Filter

Figure 3. Location of Air Filter

CAUTION (1) To prevent damage to the QSR and its components, always wear a grounded antistatic wrist strap when installing modules. See the "Using the Antistatic Wrist Strap" .

PROCEDURE: Use the following steps to remove the air filter:

Step 1 Using a flat-head screwdriver, slip the head of the screwdriver into the slot located at the middle bottom of the air filter. Carefully pry the bottom of the air filter out from the bottom of the chassis (see Figure 4). Once engaged, the air filter slips out easily.

Step 2 Remove air filter for inspection (see Figure 5).

Figure 4. Removing the Air Filter - 1

CAUTION (2) Do not place tools on the filter or filter tray. Damaging the filter can restrict air flow to the system.


Figure 5. Removing the Air Filter - 2

Inspecting the Air Filter

PROCEDURE: Use the following procedure to check the air filter:

Step 1 Visually inspect the air filter for damage or an excess of dust. If the filter is extremely dusty or damaged, replace it with a new air filter.

Step 2 If the filter is in good condition and not too dusty, move it away from the system and vacuum it thoroughly.

NOTE To keep dust particles from re-entering the system, do not vacuum the filter near the system.

Note the side of the filter where dust has accumulated.

To prevent damage to the filter fibers and metal filter screen, use caution when vacuuming.

Installing the Air Filter

PROCEDURE: Use the following procedure to install the air filter:

Step 1 Hold the clean air filter by the edges with the foam edge on top and the grid work facing down.

CAUTION (3) When replacing a cleaned air filter, the filter must be positioned and reinstalled properly. Replace the cleaned air filter with the side where the dust accumulated facing outward.

Minute dust particles may remain on the outside of the filter and if the filter is put in incorrectly, these dust particles may be sucked backed into the chassis.

Step 2 Pivot the filter to a 45° angle and slip it into the slot underneath the cable management tray, snapping the bottom of the air filter into place (see Figure 6).

Figure 6. Installing the Air Filter

Copyright © 2003 Avici Systems Inc.
Avici® and TSR® is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are trademarks of Avici Systems Inc.

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