Paradyne Network Card 8820 S3 900 User Manual

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.  
8820-A2-GZ48-00  
January 2005  
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!
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.  
Ground Wire  
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00-16794  
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.  
8820-A2-GZ48-00  
January 2005  
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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.  
PULL  
AREA  
PULL  
AREA  
CA  
DO NO  
UNDER  
USE  
PULATION!  
T
CE FINGERS  
THE  
F
THE DESIA  
G
N
NA  
TRA  
Y
PULL AREAS  
TED  
00-16795  
!
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.  
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January 2005  
8820-A2-GZ48-00  
 
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.  
Copyright © 2005 Paradyne Corporation. Printed in U.S.A.  
8820-A2-GZ48-00  
January 2005  
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*8820-A2-GZ48-00*  
*8820-A2-GZ48-00*  
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January 2005  
8820-A2-GZ48-00  
 

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