Huawei DRH3985A, DRH3919A, DRH3917A User Manual

DBS3900 IBS

V100R001C02

DRH3985A&3917A&3919A Installation Guide

Issue

Draft A

Date 2013-09-16

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2013. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.

All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice

The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.

Address: Huawei Industrial Base

Bantian, Longgang

Shenzhen 518129

People's Republic of China

Website: http://www.huawei.com

Email: support@huawei.com

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About This Document

About This Document

Purpose

This document describes the process of installing DC DRH3985A, DRH3917A and

DRH3919A (referred to as DRH in this document).

Product Version

The following table lists the product version related to this document for DRH3985A,

DRH3917A and DRH3919A.

Product Name

Product Version

 

 

DBS3900 IBS

V100R001C02

 

 

Intended Audience

This document is intended for:

Base station installation engineers

Organization

1 Changes in the DRH3985A &3917A&3919A Installation Guide

This chapter describes the changes in the DRH3985A&3917A&3919A Installation Guide.

2 Installation Preparations

This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills and prerequisites that installation engineers must have.

3 Information About the Installation

Before installing a DRH, you must be familiar with its exterior, ports, indicators, installation options and installation clearance requirements.

4 Unpacking the Equipment

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About This Document

This chapter describes how to unpack and check the delivered equipment to ensure that all the materials are included and intact.

5 Installation Process

The installation process involves installing a DRH and DRH cables, checking the DRH hardware installation, and powering on the DRH.

6 Installing the DRH

This chapter describes the procedure for installing the DRH. The DRH can be installed on a pole, U-steel, angle steel, wall, or an IFS06. The procedure for installing the DRH varies depending on installation options.

7 Installing DRH Cables

This chapter describes the procedure for installing DRH cables.

8 Checking the DRH Hardware Installation

After a DRH is installed, check the hardware installation.

9 Powering On a DRH

After all the devices are installed, check the power-on status of a DRH.

10 Appendix

This section describes the procedure for adding an easy power receptacle (pressfit type) connector.

Conventions

Symbol Conventions

The symbols that may be found in this document are defined as follows.

Symbol

Description

 

 

 

Indicates a hazard with a high level or medium level of risk

 

which, if not avoided, could result in death or serious injury.

 

 

 

Indicates a hazard with a low level of risk which, if not

 

avoided, could result in minor or moderate injury.

 

 

 

Indicates a potentially hazardous situation that, if not avoided,

 

could result in equipment damage, data loss, performance

 

deterioration, or unanticipated results.

 

 

 

Indicates a tip that may help you solve a problem or save time.

 

 

 

Provides additional information to emphasize or supplement

 

important points of the main text.

 

 

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About This Document

General Conventions

Convention

Description

 

 

Times New Roman

Normal paragraphs are in Times New Roman.

 

 

Boldface

Names of files, directories, folders, and users are in

 

boldface. For example, log in as user root.

 

 

Italic

Book titles are in italics.

 

 

Courier New

Terminal display is in Courier New.

 

 

Command Conventions

Convention

Description

 

 

Boldface

The keywords of a command line are in boldface.

 

 

Italic

Command arguments are in italics.

 

 

[ ]

Items (keywords or arguments) in square brackets [ ] are

 

optional.

 

 

{ x | y | ... }

Alternative items are grouped in braces and separated by

 

vertical bars. One is selected.

 

 

[ x | y | ... ]

Optional alternative items are grouped in square brackets

 

and separated by vertical bars. One or none is selected.

 

 

{ x | y | ... } *

Alternative items are grouped in braces and separated by

 

vertical bars. A minimum of one or a maximum of all can

 

be selected.

 

 

GUI Conventions

Convention

Description

 

 

Boldface

Buttons, menus, parameters, tabs, windows, and dialog titles

 

are in boldface. For example, click OK.

 

 

>

Multi-level menus are in boldface and separated by the ">"

 

signs. For example, choose File > Create > Folder.

 

 

Keyboard Operation

Format

Description

 

 

Key

Press the key. For example, press Enter and press Tab.

 

 

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Format

Description

 

 

 

 

Key 1+Key 2

Press the keys concurrently. For example, pressing

 

 

Ctrl+Alt+A means the three keys should be pressed

 

 

concurrently.

 

 

 

 

Key 1, Key 2

Press the keys in turn. For example, pressing Alt, A means

 

 

the two keys should be pressed in turn.

 

 

 

Mouse Operation

Action

Description

 

 

Click

Select and release the primary mouse button without

 

moving the pointer.

 

 

Double-click

Press the primary mouse button twice continuously and

 

quickly without moving the pointer.

 

 

Drag

Press and hold the primary mouse button and move the

 

pointer to a certain position.

 

 

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Contents

Contents

About This Document....................................................................................................................

 

ii

1 Changes in the DRH3985A &3917A&3919A Installation Guide

.........................................1

2 Installation Preparations .............................................................................................................

 

2

2.1

Reference Documents ...................................................................................................................................................

 

2

2.2 Tools and Instruments ...................................................................................................................................................

 

2

2.3

Skills and Requirements for Onsite Personnel..............................................................................................................

4

3 Information About the Installation ...........................................................................................

5

3.1

DRH Exterior................................................................................................................................................................

 

5

3.2

DRH Ports.....................................................................................................................................................................

 

6

3.3

DRH Indicators.............................................................................................................................................................

 

9

3.4

Installation Scenarios..................................................................................................................................................

 

10

3.5

Installation Clearance Requirements of a DRH ..........................................................................................................

19

3.5.1 Clearance for a Single DRH ....................................................................................................................................

 

19

3.5.2 Clearances for Three or More DRHs

.......................................................................................................................

21

3.5.3 Installation Spacing Between DRHs........................................................................................................................

 

25

4 Unpacking the Equipment ........................................................................................................

 

28

5 Installation Process .....................................................................................................................

 

30

6 Installing the DRH......................................................................................................................

 

31

6.1

Mounting Kits for a DRH ...........................................................................................................................................

 

31

6.2

Installing the DRH on a Pole ......................................................................................................................................

 

32

6.2.1 Installing a Single DRH ...........................................................................................................................................

 

32

6.2.2 Installing Two DRHs ...............................................................................................................................................

 

36

6.2.3 Installing Three or More DRHs ...............................................................................................................................

 

42

6.3

Installing the DRH on U-steel ....................................................................................................................................

 

45

6.4

Installing the DRH on Angle Steel..............................................................................................................................

 

49

6.5

Installing the DRH on a Wall ......................................................................................................................................

 

52

6.6

Installing a DRH on an IFS06.....................................................................................................................................

 

56

7 Installing DRH Cables...............................................................................................................

 

62

7.1

Cabling Requirements ................................................................................................................................................

 

63

7.1.1 Special Cabling Requirements .................................................................................................................................

 

65

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Contents

7.2

Cable Connections ......................................................................................................................................................

66

7.3

Installation Process .....................................................................................................................................................

68

7.4

DRH Cable List ..........................................................................................................................................................

69

7.5

Installing a DRH PGND Cable ...................................................................................................................................

70

7.6

Installing a DRH RF Jumper ......................................................................................................................................

71

7.7

Opening the Cover Plate of a DRH Cabling Cavity ...................................................................................................

75

7.8

Installing a DRH Power Cable....................................................................................................................................

77

7.9

Installing a CPRI Fiber Optic Cable ...........................................................................................................................

79

7.10 Installing a DRH Alarm Cable ..................................................................................................................................

80

7.11 Closing the Cover Plate of a DRH Cabling Cavity ...................................................................................................

81

8 Checking the DRH Hardware Installation ............................................................................

84

9 Powering On a DRH...................................................................................................................

85

10 Appendix ....................................................................................................................................

87

10.1 Adding a Tool-Less Female Connector (Pressfit Type) to the DRH Power Cable on the DRH Side........................

87

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1 Changes in the DRH3985A &3917A&3919A

Installation Guide

Installation Guide

1 Changes in the DRH3985A &3917A&3919A Installation Guide

This chapter describes the changes in the DRH3985A&3917A&3919A Installation Guide.

Draft A (2013-09-16)

This is a draft.

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2 Installation Preparations

2 Installation Preparations

About This Chapter

This chapter describes the reference documents, tools, and instruments that must be ready before the installation. In addition, it specifies the skills and prerequisites that installation engineers must have.

2.1 Reference Documents

Before the installation, you must be familiar with reference documents.

2.2 Tools and Instruments

You must prepare the following tools and instruments before the installation.

2.3 Skills and Requirements for Onsite Personnel

Onsite personnel must be qualified and trained. Before performing any operation, onsite personnel must be familiar with correct operation methods and safety precautions.

2.1 Reference Documents

Before the installation, you must be familiar with reference documents.

The following reference documents are required during DRH installation:

DRH3917A&DRH3919A&DRH3919B&DRH3985A Hardware Description

2.2Tools and Instruments

You must prepare the following tools and instruments before the installation.

 

Hammer drill (a φ12 bit)

ESD gloves

Vacuum cleaner

 

 

 

 

 

 

 

 

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Heat gun

 

Phillips screwdriver (M3 to

Flat-head screwdriver (M3 to

 

 

 

M6)

M6)

 

 

 

 

 

 

Rubber mallet

 

COAX crimping tool

Wire stripper

 

 

 

 

 

 

Utility knife

 

Cable cutter

Adjustable wrench (size ≥ 32

 

 

 

 

mm [1.26 in.])

 

 

 

 

Torque wrench

 

 

 

 

Size: 16 mm (0.63 in.) and

 

 

 

 

32 mm (1.26 in.)

 

 

 

 

Combination wrench

 

 

 

 

Size: 16 mm (0.63 in.) and

 

 

 

 

32 mm (1.26 in.)

 

 

 

 

 

 

Level

 

Torque screwdriver

Torque socket

 

 

 

5 mm

 

 

 

 

5 mm

 

 

 

 

(M3 to M6)

 

 

 

 

(M3 to M6)

 

 

 

 

 

 

 

Multimeter

 

Marker (diameter ≤ 10 mm

Measuring tape

 

 

 

[0.39 in.])

 

 

 

 

 

 

Inner hexagon wrench

Hydraulic pliers

 

 

 

 

 

 

 

 

 

 

 

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2 Installation Preparations

2.3 Skills and Requirements for Onsite Personnel

Onsite personnel must be qualified and trained. Before performing any operation, onsite personnel must be familiar with correct operation methods and safety precautions.

Before the installation, pay attention to the following items:

The customer's technical engineers must be trained by Huawei and be familiar with the proper installation and operation methods.

The number of onsite personnel depends on the engineering schedule and installation environment. Generally, only three to five onsite personnel are necessary.

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3 Information About the Installation

3 Information About the Installation

About This Chapter

Before installing a DRH, you must be familiar with its exterior, ports, indicators, installation options and installation clearance requirements.

3.1 DRH Exterior

This section describes the exterior and dimensions of a DRH.

3.2 DRH Ports

This section describes ports on the DRH panels. A DRH has a bottom panel, cabling cavity panel, and indicator panel.

3.3 DRH Indicators

This section describes six indicators on a DRH. They indicate the running status.

3.4 Installation Scenarios

A DRH can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios must meet heat-dissipation and waterproofing requirements of the DRH.

3.5 Installation Clearance Requirements of a DRH

This section describes the requirements for the installation clearance of a single DRH and multiple DRHs and the requirements for the installation spacing between DRHs.

3.1 DRH Exterior

This section describes the exterior and dimensions of a DRH.

Figure 3-1 shows a DRH.

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Figure 3-1 DRH exterior

Figure 3-2 shows DRH dimensions.

Figure 3-2 DRH dimensions

3.2 DRH Ports

This section describes ports on the DRH panels. A DRH has a bottom panel, cabling cavity panel, and indicator panel.

Figure 3-3 shows the ports on the DRH panels.

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Figure 3-3 Ports on the DRH panels

Table 3-1 describes ports and indicators on the DRH panels.

Table 3-1 Ports and indicators on the DRH panels

 

 

Item

 

 

Silkscreen

 

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

(1) Ports at the

 

 

ANT_TX/RXA

 

 

TX/RX port A

 

 

 

bottom

 

 

 

 

 

 

 

 

 

 

 

ANT_TX/RXB

 

 

TX/RX port B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANT_TX/RXC

 

 

Unused on the DRH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANT_TX/RXD

 

 

Unused on the DRH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Item

 

 

Silkscreen

 

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

RX_IN/OUT

 

Unused on the DRH

 

 

 

 

 

 

 

 

 

 

 

 

 

RET

 

Unused on the DRH

 

 

 

 

 

 

 

 

 

 

(2) Ports in the

 

 

RTN(+)

 

Power supply socket

 

 

cabling cavity

 

 

 

 

 

 

 

 

 

NEG(-)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPRI0

 

Optical/electrical port 0

 

 

 

 

 

 

 

 

 

 

 

 

 

CPRI1

 

Optical/electrical port 1

 

 

 

 

 

 

 

 

 

 

 

 

 

EXT_ALM

 

Alarm monitoring port used for monitoring

 

 

 

 

 

 

 

one RS485 signal and two dry contact

 

 

 

 

 

 

 

signals

 

 

 

 

 

 

 

 

 

 

(3) Indicators

 

 

RUN

 

See 3.3 DRH Indicators.

 

 

 

 

 

 

 

 

 

 

 

 

 

ALM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ACT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VSWR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPRI0/IR0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPRI1/IR1

 

 

 

 

 

 

 

 

 

 

Table 3-2 describes how to use the RF ports.

Table 3-2 Usage of the RF ports

 

TX/RX

 

 

Number of RF

 

Mode of RF Ports

Description

 

Channel

 

 

Ports

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2T2R

 

2

 

Combination of

Single sector

 

 

 

 

 

 

ANT_TX/RXA and

 

 

 

 

 

 

 

ANT_TX/RXB

 

 

 

 

 

 

 

 

 

Figure 3-4 describes how to use the RF ports.

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Figure 3-4 Usage of the RF ports

3.3 DRH Indicators

This section describes six indicators on a DRH. They indicate the running status.

For detailed positions of DRH indicators, see 3.2 DRH Ports.

Table 3-3 describes DRH indicators.

Table 3-3 DRH indicators

 

Indicator

Color

Status

Meaning

 

 

 

 

 

 

 

 

RUN

Green

Steady on

There is power supply, but the module is

 

 

 

 

 

faulty.

 

 

 

 

 

 

 

 

 

 

Steady off

There is no power supply, or the module is

 

 

 

 

 

faulty.

 

 

 

 

 

 

 

 

 

 

Blinking (on for

The board is functioning properly.

 

 

 

 

1s and off for 1s)

 

 

 

 

 

 

 

 

 

 

 

Blinking (on for

Software is being loaded to the module, or

 

 

 

 

0.125s and off for

the module is not started.

 

 

 

 

0.125s)

 

 

 

 

 

 

 

 

ALM

Red

Steady on

Alarms are generated, and the module must

 

 

 

 

be replaced.

 

 

 

 

 

 

 

 

 

 

Blinking (on for

Alarms are generated. The alarms may be

 

 

 

 

1s and off for 1s)

caused by the faults on the related boards or

 

 

 

 

ports. Therefore, you need to locate the

 

 

 

 

 

fault before deciding whether to replace the

 

 

 

 

module.

 

 

 

 

 

 

 

 

 

 

Steady off

No alarm is generated.

 

 

 

 

 

 

 

 

 

 

 

 

 

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3 Information About the Installation

 

 

 

 

 

 

 

 

 

 

 

Indicator

 

Color

 

 

Status

 

 

Meaning

 

 

 

 

 

 

 

 

 

 

 

ACT

 

Green

 

 

Steady on

 

 

The module is running properly with TX

 

 

 

 

 

 

 

 

 

channels enabled or the software is being

 

 

 

 

 

 

 

 

 

loaded without DRH running.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blinking (on for

 

 

The module is running properly with TX

 

 

 

 

 

 

1s and off for 1s)

 

 

channels disabled.

 

 

 

 

 

 

 

 

 

 

 

VSWR

 

Red

 

 

Steady off

 

 

No Voltage Standing Wave Ratio (VSWR)

 

 

 

 

 

 

 

 

 

alarm is generated.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blinking (on for

 

 

VSWR alarms are generated on the

 

 

 

 

 

 

1s and off for 1s)

 

 

ANT_TX/RXB port.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Steady on

 

 

VSWR alarms are generated on the

 

 

 

 

 

 

 

 

 

ANT_TX/RXA port.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blinking (on for

 

 

VSWR alarms are generated on the

 

 

 

 

 

 

0.125s and off for

 

 

ANT_TX/RXA and ANT_TX/RXB ports.

 

 

 

 

 

 

0.125s)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPRI0/IR0

 

Red or

 

 

Steady green

 

 

The CPRI link is functioning properly.

 

 

 

green

 

 

 

 

 

 

 

 

 

 

 

Steady red

 

 

An optical module fails to transmit or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

receive signals because the optical module

 

 

 

 

 

 

 

 

 

is faulty or the fiber optic cable is broken.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blinking red (on

 

 

The CPRI link is out of lock because of a

 

 

 

 

 

 

for 1s and off for

 

 

failure in clock lock between two modes or

 

 

 

 

 

 

1s)

 

 

mismatched data rates over CPRI ports.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Steady off

 

 

The optical module cannot be detected, or

 

 

 

 

 

 

 

 

 

the optical module is powered off.

 

 

 

 

 

 

 

 

 

 

 

CPRI1/IR1

 

Red or

 

 

Steady green

 

 

The CPRI link is functioning properly.

 

 

 

green

 

 

 

 

 

 

 

 

 

 

 

Steady red

 

 

An optical module fails to transmit or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

receive signals because the optical module

 

 

 

 

 

 

 

 

 

is faulty or the fiber optic cable is broken.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blinking red (on

 

 

The CPRI link is out of lock because of a

 

 

 

 

 

 

for 1s and off for

 

 

failure in clock lock between two modes or

 

 

 

 

 

 

1s)

 

 

mismatched data rates over CPRI ports.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Steady off

 

 

The optical module cannot be detected, or

 

 

 

 

 

 

 

 

 

the optical module is powered off.

 

 

 

 

 

 

 

 

 

 

3.4 Installation Scenarios

A DRH can be installed on a pole, U-steel, angle steel, wall, or IFS06. Installation scenarios must meet heat-dissipation and waterproofing requirements of the DRH.

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Requirements for the Installation Scenarios

Method of installation:

To ensure the heat dissipation of the DRH and waterproofing of the ports at the bottom of the DRH, the vertical deviation angle of a DRH must be less than or equal to 10 degrees, as shown in Figure 3-5.

U-steel and angle steel support the standard or reverse installation of a single DRH only.

Figure 3-5 Requirements for the vertical deviation angle of a DRH

(1) DRH

(2) Installation support (pole, U-steel, angle steel, or wall)

Installing a DRH on a Pole

Figure 3-6 shows the diameter of a pole for installing a DRH.

Figure 3-6 Diameter of a pole

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The diameter of a pole for installing a DRH ranges from 60 mm (2.36 in.) to 114 mm (4.49 in.). The recommended diameter is 80 mm (3.15 in.).

When the diameter of a pole ranges from 60 mm (2.36 in.) to 76 mm (2.99 in.), a maximum of three DRHs can be installed on the pole.

Only a pole whose diameter ranges from 76 mm (2.99 in.) to 114 mm (4.49 in.) supports more than three DRHs.

The recommended thickness of the wall of a pole is 3.5 mm (0.14 in.) or above.

A single DRH can be installed in either side-mounted or standard mode.Figure 3-7 shows a single DRH installed on a pole.

Figure 3-7 A single DRH installed on a pole

Two DRHs can be installed next to each other at the same level or vertically at different levels.Figure 3-8 shows two DRHs installed on a pole.

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Figure 3-8 Two DRHs installed on a pole

Figure 3-9, Figure 3-10, and Figure 3-11 show three or more DRHs installed on a pole.

Figure 3-9 Three DRHs installed on a pole

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Figure 3-10 Four DRHs installed on a pole

Figure 3-11 Six DRHs installed on a pole

Installing a DRH on U-steel

Figure 3-12 shows U-steel specifications.

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Figure 3-12 U-steel specifications

It is recommended that only one DRH be installed on one U-steel.

Figure 3-13 shows a DRH installed on U-steel.

Figure 3-13 DRH installed on U-steel

Installing a DRH on Angle Steel

Figure 3-14 shows angle steel specifications.

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Figure 3-14 Angle steel specifications

It is recommended that only one DRH be installed on one angle steel.

Figure 3-15 shows a DRH installed on angle steel.

Figure 3-15 DRH installed on angle steel

Installing a DRH on a Wall

The wall for installing DRHs must meet the following requirements:

For each DRH, the wall must be able to bear a weight four times the DRH's weight and the bolts' pulling force of 1.25 kN (281.25 lbf) vertical to the wall.

Expansion bolts must be tightened to 15 N·m (132.76 lbf·in.) so that the bolts stay secured without damaging the wall.

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The mounting brackets for multiple DRHs cannot be combined when the DRHs are installed on a wall in side-mounted mode, as shown in Figure 3-16.

Figure 3-16 Correct installation of mounting brackets for multiple DRHs

Figure 3-17 shows a DRH installed on a wall.

Figure 3-17 DRH installed on a wall

Installing a DRH on an IFS06

In an IFS06 scenario:

The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for heights of DRHs.

The IFS06 supports at least three DRHs when the ambient temperature is higher than or equal to the lowest operating temperature of the DRH and at least 5°C (41°F) lower than the highest operating temperature of the DRH. The IFS06 supports a maximum of six DRHs when the ambient temperature is higher than or equal to the lowest operating temperature of the DRH and at least 10°C (50°F) lower than the highest operating temperature of the DRH.

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The mounting brackets for multiple DRHs cannot be combined when the DRHs are installed on an IFS06, as shown in Figure 3-16.

Figure 3-18 and Figure 3-19 show DRHs installed on an IFS06.

Figure 3-18 Three DRHs installed on an IFS06

(1) Height-restricted scenario

(2) Height-unrestricted scenario

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Figure 3-19 Six DRHs installed on an IFS06

(1) Height-restricted scenario

(2) Height-unrestricted scenario

3.5 Installation Clearance Requirements of a DRH

This section describes the requirements for the installation clearance of a single DRH and multiple DRHs and the requirements for the installation spacing between DRHs.

3.5.1 Clearance for a Single DRH

This section describes the recommended and minimum clearance for a single DRH.

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The recommended clearance ensures normal running and provides an appropriate space for operation and maintenance (OM). If there is sufficient space, leave the recommended clearance after installing the equipment.

The minimum clearance ensures normal running and heat dissipation, but OM activities such as checking indicator status and opening the cabling cavity cannot be properly conducted. If the installation space is restricted, leave the minimum clearance after installing the equipment.

Recommended Clearance for a Single DRH

Figure 3-20 shows the recommended clearance for a single DRH.

Figure 3-20 Recommended clearance for a single DRH

Minimum Clearance for a Single DRH

Figure 3-21 shows the minimum clearance for a single DRH.

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Figure 3-21 Minimum clearance for a single DRH

3.5.2 Clearances for Three or More DRHs

This section describes the recommended and minimum clearances for three or more DRHs.

The recommended clearances ensure normal running and provide an appropriate space for operation and maintenance (OM). If there is sufficient space, retain the recommended clearances.

The minimum clearances ensure normal running and heat dissipation but do not allow OM activities such as checking indicator status and opening the cabling cavity. If the installation space is insufficient, retain the minimum clearances after the installation.

Recommended Clearances for Three or More DRHs Installed on a Pole

Figure 3-22 shows the recommended clearances for multiple DRHs installed in centralized mode.

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Figure 3-22 Recommended clearances for three or more DRHs installed on a pole

Minimum Clearances for Three or More DRHs Installed on a Pole

Figure 3-23 shows the minimum clearances for multiple DRHs installed in centralized mode.

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