Paradyne 8820-S3-900 User manual

8820-A2-GZ48-00 January 2005 1

Replacement Fan Tray Assembly for the

8820 Broadband Loop Carrier

Model 8820-S3-900

Installation Instructions

Document Number 8820-A2-GZ48-00

January 2005

Fan Tray Assembly

The fan tray assembly is a dedicated cooling device installed in the chassis of the

8820 Broadband Loop Carrier (BLC) to provide forced–air cooling of the chassis.

The fans, located at the top of the BLC chassis, draw cooling air upwards from the

bottom of the chassis, through the circuit cards or card cage, forcing the air out the

opening, located at the top rear of the chassis.

The fan tray assembly consists of six fans, a metal bracket, and a printed wiring

board (PWB) with a press-fit connector and five status LEDs. Each fan provides a

sense wire that indicates the status of the fan. The sense wires are connected to

the backplane via the fan tray’s PWB and its connector.

The rated airflow is 900 cfm (based on 6 fans at 150 cfm each) at zero back

pressure.

The fan tray is powered by –48 or –60 VDC from the backplane of the 8820 BLC.

Nominal power consumption is less than 100 watts.

An LED is on the fan tray so that if a fan failure occurs, a signal is sent to the SCP

card or MCP card and the yellow Fan ALARM LED on the chassis lights. Removal

of the fan tray also causes the SCP card or MCP card to sense an alarm.

The fan tray assembly weighs 10 lbs (22 kg). It is secured by two fan-locking

brackets located on the right and left front of the assembly.

2 January 2005 8820-A2-GZ48-00

Removing the Existing Fan Tray Assembly

You will need a Phillips screwdriver to remove the vent cover and fan tray.

Procedure

To remove the existing fan tray assembly:

1. Remove three screws from the fan

cover plate, and then remove the

cover plate from the chassis, taking

care not to damage the LED

protruding through the cover plate.

2. Loosen (but do not remove)

the two screws on each

locking bracket, and use

them to slide both locking

brackets toward the middle

of the front panel until the

ends clear the slots in the

side plates.

NOTE:

There are two cutouts in the front face of the fan tray labeled PULL AREA.

This is where you place your fingers to pull the fan tray out of the chassis.

WARNING:

A MECHANICAL HAZARD EXISTS DUE TO ROTATING FAN BLADES. KEEP

HANDS AND FINGERS AWAY FROM FAN BLADES DURING REMOVAL OF

FAN TRAY. USE ONLY THE DESIGNATED PULL AREAS TO DISENGAGE

THE FAN TRAY.

00-16792

ALARMS

Major Minor

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Loosen Screws

Locking

Bracket

!

8820-A2-GZ48-00 January 2005 3

ATTENTION:

UN RISQUE MÉCANIQUE EXISTE EN RAISON DE LA ROTATION DES PALES

DU VENTILATEUR. GARDER LES MAINS ET LES DOIGTS LOIN DES PALES

DU VENTILATEUR PENDANT LE DEMONTAGE DU CACHE DU

VENTILATEUR. UTILISER UNIQUEMENT LES ZONES INDIQUÉES DE

TRACTION POUR DÉMONTER LE CACHE DU VENTILATEUR.

VORSICHT:

VERLETZUNGSGEFAHR AUFGRUND ROTIERENDER VENTILATORFLÜGEL.

BEI ABNAHME DER VENTILATOR–ABDECKUNG ODER AUSBAU DES

VENTILATORS NICHT IN DEN ROTATIONSBEREICH DES VENTILATORS

GREIFEN. BEI AUSBAU DES VENTILATORS FESTE UND BEWEGLICHE

TEILE NUR AN DEN GEKENNZEICHNETEN STELLEN BERÜHREN.

3. Using both hands, place your index fingers in the PULL AREA openings and

pull forward about an inch to disconnect the fan tray’s connector from the

backplane. The spinning fan blades will now be visible.

4. Wait until the fan blades stop spinning (which should be less than a

minute). Disconnect the ground wire from the quick connect terminal on the

chassis.

5. Remove the fan tray from the chassis.

!

CAUTION!

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Ground Wire

4 January 2005 8820-A2-GZ48-00

Installing a Replacement Fan Tray Assembly

You will need a Phillips screwdriver to install a replacement fan tray.

Procedure

To install a replacement fan tray:

1. Hold the replacement fan tray horizontally and guide its tabs into the two card

guides located inside the right and left side plates.

WARNING:

If the chassis is powered on, when the fan tray’s connector is seated in the

backplane, the fan blades start spinning. Proper care should be taken to

prevent contact with the spinning fan blades.

2. Pressing on the front of the fan tray bracket, push the fan tray half way in and

attach the ground wire. Then, fully seat the fan tray.

NOTE:

When the fan tray is running at full speed the Fan ALARM LED will go out,

indicating that all fans are operating properly.

3. Loosen the two screws slightly on each locking bracket and slide the locking

brackets outward until they engage the slots located on the left and right side

plates.

NOTE:

When properly extended or locked, the brackets should be extended into the

slots on the side plates and a threaded insert on the locking bracket should be

aligned with (and visible through) the two outermost holes of the fan tray.

4. Tighten the two screws on each bracket, making sure that the bracket’s inserts

stay aligned with the holes in the fan tray.

00-16795

CAUTION!

DO NOT PLACE FINGERS

UNDER THE FAN TRAY

USE THE DESIGNATED

PULL AREAS

PULL

AREA

PULL

AREA

!

8820-A2-GZ48-00 January 2005 5

5. Replace the fan cover plate, aligning the five holes at the bottom with the five

status LEDs.

6. Replace and tighten the three screws removed earlier to secure the fan cover

plate to the chassis.

Warranty, Sales, Service, and Training Information

Contact your local sales representative, service representative, or distributor

directly for any help needed. For additional information concerning warranty,

sales, service, repair, installation, documentation, training, distributor locations, or

Paradyne worldwide office locations, use one of the following methods:

 Internet: Visit the Paradyne World Wide Web site at www.paradyne.com.

(Be sure to register your warranty at www.paradyne.com/warranty

 Telephone: Call our automated system to receive current information by fax

or to speak with a company representative.

— Within the U.S.A., call 1-800-870-2221

— Outside the U.S.A., call 1-727-530-2340

Product Documentation Online

Complete documentation for Paradyne products is available at

www.paradyne.com. Select Support → Technical Manuals.

To order a paper copy of a Paradyne document, or to speak with a sales representative,

please call 1-727-530-2000.

6 January 2005 8820-A2-GZ48-00

*8820-A2-GZ48-00*

Paradyne 8820-S3-900 User manual

Paradyne 8820-S3-900 User manual

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