Paradyne Fan Tray 8820-S2-900 Bedienungsanleitung

8820-A2-GZ44-10 June 2004

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. 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.

00-16792

ALARMS

Major MinorFan

POWER

SERIAL

SMCM

CLOCK

ALARM

24681012141618

135

7911131517

LAN/WANSLOT

CLOCKB

SERIAL

MCCAC

ALARM

48VRTN

48VNEG

POWERENTRYMODULE

LEFTUNIT:LINEA

RIGHTUNIT:LINEB

WARNING!

POWERMUSTBEDISCONNECTEDATTHESOURCE

BEFOREREMOVINGORINSTALLINGTHISPWRENTRYMODULE

48VRTN

48VNEG

POWERENTRYMODULE

LEFTUNIT:LINEA

RIGHTUNIT:LINEB

WARNING!

POWERMUSTBEDISCONNECTEDATTHESOURCE

BEFOREREMOVINGORINSTALLINGTHISPWRENTRYMODULE

2 8820-A2-GZ44-10

June 2004

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.

00-16793

CAUTION!

DO NOTPLACE FINGERS

UNDERTHE FANTRAY

USETHE DESIGNATED

PULL AREAS

CAUTION!

DONOTPLACEFINGERS

UNDERTHEFANTRAY

USETHEDESIGNATED

PULLAREAS

PULL

AREA

PULL

AREA

Loosen Screws

Locking

Bracket

8820-A2-GZ44-10 June 2004

!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.

CAUTION!

DO NOT PLACEFINGERS

UNDERTHE FAN TRAY

USETHE DESIGNATED

PULL AREAS

00-16794

CAUTION!

DONOTPLACEFINGERS

UNDERTHEFANTRAY

USETHEDESIGNATED

PULLAREAS

PULL

AREAPULL

AREA

Ground Wire

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

minute). Disconnect the ground wire attached to the fan tray bracket, from the

quick connect terminal on the chassis.

5. Remove the fan tray from the chassis.

4 8820-A2-GZ44-10

June 2004

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.

00-16795

CAUTION!

DO NOT PLACE FINGERS

UNDER THE FAN TRAY

USE THE DESIGNATED

PULL AREAS

PULL

AREA PULL

AREA

!WARNING:

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

the backplane’s connector, 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.

8820-A2-GZ44-10 June 2004

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:

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

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

HTelephone: 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

*8820-A2-GZ44-10*

*8820–A2–GZ44–10*

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