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Replacement Fan Tray Assembly for the
8820 Broadband Access Concentrator
Model 8820-S2-900
Installation Instructions
Document Number 8820-A2-GZ44-10
June 2004
What is the Fan Tray Assembly?
8820-A2-GZ44-10
The fan tray assembly is a dedicated cooling device installed in the chassis of the
8820 Broadband Access Concentrator (BAC) to provide forced-air cooling of the
chassis. The fans, located at the top of the BAC 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 VDC from the backplane of the 8820 BAC.
Nominal power consumption is less than 100 watts, depending upon the
manufacturer.
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 in place by two
fan-locking brackets located on the right and left front of the assembly.
June 2004
1
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Summary of Contents for Paradyne Fan Tray 8820-S2-900
- Page 1 Replacement Fan Tray Assembly for the 8820 Broadband Access Concentrator Model 8820-S2-900 Installation Instructions Document Number 8820-A2-GZ44-10 June 2004 What is the Fan Tray Assembly? The fan tray assembly is a dedicated cooling device installed in the chassis of the 8820 Broadband Access Concentrator (BAC) to provide forced-air cooling of the chassis.
- Page 2 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...
- Page 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.
- Page 4 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.
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Page 5: Warranty, Sales, Service, And Training Information
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. - Page 6 *8820-A2-GZ44-10* *8820–A2–GZ44–10*...