HP Switch Fan Assemblies User Manual

HP FlexFabric 7904 Fan Trays

(JG839A & JG684A)

User Guide

Part number: 5998-4301
Document version: APW100-20130830

5998-4301

Legal and notice information

© Copyright 2013 Hewlett-Packard Development Company, L.P.

No part of this documentation may be reproduced or transmitted in any
form or by any means without prior written consent of Hewlett-Packard
Development Company, L.P.

The information contained herein is subject to change without notice.

HEWLETT-PACKARD COMPANY MAKES NO WARRANTY OF ANY
KIND WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be
liable for errors contained herein or for incidental or consequential
damages in connection with the furnishing, performance, or use of this
material.

The only warranties for HP products and services are set forth in the
express warranty statements accompanying such products and services.
Nothing herein should be construed as constituting an additional
warranty. HP shall not be liable for technical or editorial errors or
omissions contained herein.

Contents

Fan tray overview ···················································································· 1

Back-to-front airflow fan tray ····························································· 1

Introduction ···················································································· 1
Back-to-front airflow fan tray specifications ································ 2

Front-to-back airflow fan tray ···························································· 3

Introduction ···················································································· 3
Front-to-back airflow fan tray specifications ······························· 4

Installing and replacing a fan tray ························································· 5

Installing a fan tray ············································································ 5
Replacing a fan tray ·········································································· 8

Support and other resources ································································ 10

Contacting HP ·················································································· 10

Subscription service ··································································· 10

Related information ········································································· 11

Documents ·················································································· 11
Websites ····················································································· 11

Conventions ····················································································· 11

i

Fan tray overview

Back-to-front airflow fan tray

Introduction

The HP FlexFabric 7904 back (power side) to front (port side) airflow
Fan Tray (JG839A) provides powerful cooling and heat dissipation for
the switch. It blows cool air into the switch from the power side to the
port side. The fan tray has five fans and features small size, fast heat
dissipation, and hot swapping. It can automatically adjust the fan speed
based on the switch temperature.

Figure 1 Fan tray view

3 4

1

(1) Captive screw

2

1