Paradyne Fan Tray Assembly 8820-S3-900 User Manual download pdf

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.

1 2 3 4 5 6

Summary of Contents

Page 1 - Fan Tray Assembly

8820-A2-GZ48-00 January 2005 1Replacement Fan Tray Assembly for the8820 Broadband Loop CarrierModel 8820-S3-900Installation InstructionsDocument Numbe

Page 2 - WARNING:

2 January 2005 8820-A2-GZ48-00Removing the Existing Fan Tray AssemblyYou will need a Phillips screwdriver to remove the vent cover and fan tray.Proced

Page 3 - VORSICHT:

8820-A2-GZ48-00 January 2005 3ATTENTION:UN RISQUE MÉCANIQUE EXISTE EN RAISON DE LA ROTATION DES PALES DU VENTILATEUR. GARDER LES MAINS ET LES DOIGTS L

Page 4

4 January 2005 8820-A2-GZ48-00Installing a Replacement Fan Tray AssemblyYou will need a Phillips screwdriver to install a replacement fan tray.Procedu

Page 5 - Product Documentation Online

8820-A2-GZ48-00 January 2005 55. Replace the fan cover plate, aligning the five holes at the bottom with the five status LEDs.6. Replace and tighten t

Page 6 - *8820-A2-GZ48-00*

6 January 2005 8820-A2-GZ48-00*8820-A2-GZ48-00**8820-A2-GZ48-00*

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Paradyne Fan Tray Assembly 8820-S3-900 User Manual

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