ADC HIGAIN HRE-712 List 1 User manual

HIGAIN REMOTE ENCLOSURES
USER MANUAL
HRE-712 List 1
Part Number: 150-2257-01
CLEI Code: T1M1XL0C
HRE-712 List 2
Part Number: 150-2257-02
CLEI Code: T1M1YL0C
HRE-712 List 1
HRE-712 List 2

150-712-200-02
ii July 26, 2000 HRE-712 List 1 and List 2
Revision History of This Manual
Copyright
July 26, 2000
© 2000 ADC DSL Systems, Inc. All rights reserved.
Trademark Information
ADC and ADC Telecommunications are registered trademarks of ADC Telecommunications, Inc. Soneplex is a registered
trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of ADC DSL Systems, Inc. No right, license, or
interest to such trademarks is granted hereunder, and you agree that you shall assert no such right, license, or interest with respect
to such trademarks. All other product names mentioned in this document are used for identification purposes only and may be
trademarks or registered trademarks of their respective companies.
Information contained in this document is company private ADC DSL Systems, Inc., and shall not be modified, used, copied,
reproduced or disclosed in whole or in part without the written consent of ADC DSL Systems, Inc.
Information furnished by ADC DSL Systems, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by
ADC DSL Systems, Inc. for its use, nor for any infringement of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of ADC DSL Systems, Inc. ADC DSL Systems,
Inc. reserves the right to change specifications at any time without notice.
Revision Release Date Revisions Made
01 July 26, 2000 Initial Release
02 August 12, 2002 ADC Rebrand

150-712-200-02 Using This Manual
HRE-712 List 1 and List 2 July 26, 2000 iii
USING THIS MANUAL
The following conventions are used in this manual:
•Monospace type indicates screen text, including text you type at a screen prompt.
•Keys you press are indicated by small icons such as . Key combinations to be pressed simultaneously
are indicated with a plus sign as follows: + .
•The items you type appear in bold.
•Three types of messages, identified by icons, appear in the text.
For a list of abbreviations used in this document, refer to “Appendix D - Abbreviations” on page 42.
INSPECTING SHIPMENT
Upon receipt of the equipment:
•Unpack each container and inspect the contents for signs of damage. If the equipment has been damaged in
transit, immediately report the extent of damage to the transportation company and to ADC DSL Systems,
Inc. Order replacement equipment, if necessary.
•Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short
or irregular, contact ADC DSL Systems, Inc. as described in “Appendix C - Product Support” on page 41. If
you must store the equipment for a prolonged period, store the equipment in its original container.
Notes contain information about special circumstances.
Caution symbols indicate the possibility of equipment damage or personal injury.
The Electrostatic Discharge (ESD) susceptibility symbol indicates that a device or assembly is
susceptible to damage from electrostatic discharge.
ENTER
CTRL ESC

Inspecting Shipment 150-712-200-02
iv July 26, 2000 HRE-712 List 1 and List 2

150-712-200-02 Table of Contents
HRE-712 List 1 and List 2 July 26, 2000 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Applications .......................................................................................................................................1
HRE-712 List 1 Gel-Filled Stub..........................................................................................2
HRE-712 List 2 Air-Filled Stub ..........................................................................................3
Pressurized Applications....................................................................................................................4
Installation___________________________________________________________________________ 6
Prior to Mounting...............................................................................................................................6
Mounting the HRE-712 List 1 ...........................................................................................................7
Pedestal or Small Pole Mounting the HRE-712 List 1........................................................8
Large Pole Mounting the HRE-712 List 1...........................................................................9
Flat Surface Mounting the HRE-712 List 1.........................................................................9
Rack Mounting the HRE-712 List 1..................................................................................10
Mounting the HRE-712 List 2 .........................................................................................................11
Flat Surface Mounting the HRE-712 List 2.......................................................................11
Rack Mounting the HRE-712 List 2..................................................................................12
Grounding the HRE-712 List 1 and List 2.......................................................................................13
Installing Doubler and Repeater Units.............................................................................................15
Detaching the Enclosure from the Baseplate...................................................................................15
Opening the Enclosure.....................................................................................................................16
Opening a Gel-filled Enclosure.........................................................................................16
Opening an Air-filled Enclosure........................................................................................16
Closing the Enclosure ......................................................................................................................17
Pivoting the HRE-712 List 1............................................................................................................18
Appendix A - Technical Reference ______________________________________________________ 19
Card Cage.........................................................................................................................................19
Lightning Protection Unit ................................................................................................................20
Cable Stub and Pressurization..........................................................................................................21
HRE-712 List 1 Vented-to-Pressurized Conversion Procedure.......................................................22
Spare Connections............................................................................................................................23
Order Wire Connections ..................................................................................................................23
Wiring ..............................................................................................................................................24
General Deployment Rules ..............................................................................................................26
Maintenance.....................................................................................................................................28
Pre-Splicing Procedure......................................................................................................28
Splicing Procedure.............................................................................................................29

Table of Contents 150-712-200-02
vi July 26, 2000 HRE-712 List 1 and List 2
Post-Splicing Procedure.................................................................................................... 31
Replacement Parts........................................................................................................................... 33
Valve Replacement Procedures....................................................................................................... 35
Replacing the Pressure Relief Valve................................................................................. 35
Replacing the Breather-Vent Valve.................................................................................. 36
Replacing the Air-Stem Valve.......................................................................................... 36
Replacing the Pressure-Cutoff Valve................................................................................ 37
Appendix B - Specifications____________________________________________________________ 38
Appendix C - Product Support _________________________________________________________ 41
Appendix D - Abbreviations ___________________________________________________________ 42
Certification and Warranty______________________________________________ Inside Back Cover

150-712-200-02 List of Figures
HRE-712 List 1 and List 2 July 26, 2000 vii
LIST OF FIGURES
1. HRE-712 List 1 Remote Gel-Filled Enclosure..............................................................................................2
2. HRE-712 List 2 Remote Air-Filled Enclosure ..............................................................................................3
3. Metal Valves..................................................................................................................................................5
4. Pivot-Mounting Bracket ................................................................................................................................7
5. Base Plate Mounting Bracket ......................................................................................................................12
6. Grounding the HRE-712..............................................................................................................................14
7. Front View of HRE-712 12-slot Card Cage................................................................................................19
8. Lightning Protection Unit............................................................................................................................20
9. Wiring Diagram Gummed Label.................................................................................................................25
10. Cable Stub Construction..............................................................................................................................28
11. Dress Splice in Splice Case .........................................................................................................................30
12. Post-Splicing Procedure ..............................................................................................................................31
13. Screen Folding Diagram..............................................................................................................................32
14. HRE-712 List 1 Bar Code and P1 Label Locations.....................................................................................39
15. HRE-712 List 2 Bar Code and P1 Label Locations.....................................................................................40

List of Tables 150-712-200-02
viii July 26, 2000 HRE-712 List 1 and List 2
LIST OF TABLES
1. Slot Pair Assignments.................................................................................................................................. 15
2. Binder Group Stub Cable Termination........................................................................................................ 24
3. Inner Statial Pair Cable Stub Wire Assignment .......................................................................................... 25
4. Deployment Rules for Doublers and Remote Units .................................................................................... 26
5. Replacement Part Kits ................................................................................................................................. 34
6. Bar Code and P1 Label Information............................................................................................................ 40

150-712-200-02 Overview
HRE-712 List 1 and List 2 July 26, 2000 1
OVERVIEW
This document describes and provides installation instructions for the following HiGain®Remote Enclosures:
•HRE-712 List 1 (gel filled)
•HRE-712 List 2 (air filled)
FEATURES
•Aluminum card cage enclosure for up to 12 doublers. Each doubler slot’s pair assignments are shown in
Table 1 on page 15. See also “Card Cage” on page 19.
•Unique card guides that automatically adapt to accommodate the following form factors:
–Full T1 (1.544 Mbps) doublers: HDU-437 and HDU-407 (Digital Data Service [DDS] mechanics),
HDU-439 (dual 239 T1 mechanics) or HDU-409 (single T1 mechanics)
–Fractional T1 (772 Mbps) doublers: HDU-217 (DDS mechanics) or HDU-219 (dual 239 T1 mechanics)
–239 T1 repeaters
–Integrated Services Digital Network (ISDN) repeaters
•30-foot (9.1 m), gel-filled or air-filled, 52-pair cable stubs
•Front leading profile for underground HRE-712 List 2 and standard vertical mounting for HRE-712 List 1 for
aboveground applications.
•Primary surge protection
•Seamless, stainless steel cover that maintains weathertight integrity and provides efficient heat exchange to
expel the heat generated within the HRE-712.
•HRE-712 List 2 has a stainless steel composite baseplate for the HRE-712 List 2 for easy replacement when
used as a 4-slot HRE-454.
APPLICATIONS
The primary application of the HRE-712 is to house HiGain doubler units in an HDSL T1 transmission system. It
is designed to protect HiGain doubler units from potentially harmful conditions found in outdoor environments.
•The HRE-712 List 1, shown in Figure 1 on page 2, contains a gel-core stub and is intended for aboveground
applications that do not require pressurization through the cable stub.If youprefer to pressurize the enclosure,
it can be locally pressurized using an optional pressure-relief valve.
•The HRE-712 List 2, shown in Figure 2 on page 3, contains an air-core stub and is intended for underground
installations. It can be pressurized from the main feeder cable through its air-core stub. The pressurization
prevents the enclosure from flooding when mounted in underground manholes. Both enclosure models are
similar in that they have primary gas-tube surge protection on all cable pairs. In addition, if you prefer not to
pressurize the enclosure, you can use the optional breather-vent to allow it to breathe.

Overview 150-712-200-02
2 July 26, 2000 HRE-712 List 1 and List 2
HRE-712 List 1 Gel-Filled Stub
The gel-filled cable stub on the HRE-712 List 1, shown in Figure 1, is equivalent to an ALP FTS-PIC, filled-core
telephone cable. Table 2 on page 24 provides a description of the cable stub. The enclosure is intended for
aboveground applications. Standard color codes are used for pair identification with color compounds chosen for
electrical balance and permanency. An inner core jacket protects the core and provides improved mechanical and
electrical characteristics. The outer jacket consists of material that provides protective covering from sunlight,
atmospheric temperatures, ground chemicals and stresses expected in standard installations.
The HRE-712 List 1 enclosure is equipped with three metal valves installed in the base section, shown in Figure 1.
The breather-vent assembly allows the circulation of outside air through the HRE-712 List 1 enclosure when it is
not pressurized. The enclosure must breathe to prevent excess moisture and other damaging contaminants from
accumulating within the enclosure.
An optional external pressure-relief valve is included in the shipping kit for the HRE-712 List 1. Use the valve in
place of the breather-vent assembly when sealing the enclosure for underground applications, or when locally
pressurizing the HRE-712 List 1.
The combinedSchrader air-stem and External AirIntake T-valve, shown in Figure 1, has both aSchrader air valve
and an air intake port that accepts a tube for connection to an external air source. In addition, the Schrader valve
can relieve the internal pressure of the dome when using an external air source. The external source must be able
to be turned off upstream from the air intake port.
“HRE-712 List 1 Vented-to-Pressurized Conversion Procedure” on page 22 provides instructions on converting
the enclosure to a pressurized enclosure. The Pressure Cutoff valve allows the external source of air to be cut off
when the cover is to be removed.
Figure 1. HRE-712 List 1 Remote Gel-Filled Enclosure
The gel-filled cable complies with the requirements of ANSI/ICEA S-84-608-1994 and REA
PE-89.
Grounding lug
Cable stub entry
Pivot bracket
Order wire connection
Breather vent valve or
optional pressure relief valve
V-Band T-handle
Pressure Cutoff valve
Schrader Air stem/Air intakeT-valve
BottomView
(to pressure
supply)
Pressure supply
connection
(1/2"/24 thread)
Air intake
Air stem

150-712-200-02 Overview
HRE-712 List 1 and List 2 July 26, 2000 3
HRE-712 List 2 Air-Filled Stub
The air-filled cable stub on the HRE-712 List 2, shown in Figure 2, is equivalent to an ALP FTS-PIC air-core
telephone cable. Table 2 on page 24 provides a complete description of the cable stub.
This enclosure is intended for underground and duct applications. Standard color codes are used for pair
identification with color compounds chosen for electrical balance and permanency. An inner jacket protects the
core and provides improved mechanical and electrical characteristics. The outer jacket provides a protective
covering that withstands exposure to sunlight, atmospheric temperatures, ground chemicals, and stresses expected
in standard installations.
Figure 2. HRE-712 List 2 Remote Air-Filled Enclosure
The HRE-712 List 2 unit, similar to the HRE-712 List 1, contains three metal valves: internal air-pressure cutoff
valve, Schrader air-stem valve, and pressure-relief valve. The air-pressure cutoff valve is used to shut off the inlet
air supply that is pumped from the main feeder cable through the 30-foot (9.144m) stub into the HRE-712
enclosure.
•To shut off the inlet air supply, turn the air-pressure cutoff valve clockwise one full turn.
•To turn on the inlet air supply, turn the air-pressure cutoff valve counterclockwise one full turn.
The air-filled cable complies with the requirements of ANSI/ICEA S-85-625-1994 and REA
PE-22.
Pressure-cutoff valve
Schrader
air stem valve
Ground lug
Baseplate-mounting
bracket
Cable stub
Order-wire access
Pressure-relief valve or
Optional breather vent
BottomView

Overview 150-712-200-02
4 July 26, 2000 HRE-712 List 1 and List 2
PRESSURIZED APPLICATIONS
The HRE-712 List 2 can be pressurized either:
•through its air-filled cable stub when connected to a pressurized main feeder cable
•from the Schrader air-stem valve when connected to gel-filled feeder cables.
A pressure gauge can be attached to the air-stem valve for the purpose of measuring the internal pressure of the
enclosure. The air-stem valve is also used to relieve the internal pressure prior to opening andremoving the dome
cover when pressurized through the stub. This can be done by pressing down on the valve’s center pin. Figure 2
on page 3 and Figure 3 on page 5 show the air-stem valve and pin locations.
An optional breather-vent assembly is enclosed in the HRE-712 List 2 shipping kit. The kit is a small plastic bag
that is attached to the spare pair (brown-white) shrink tab. This assembly is used to replace the pressure-relief
valve when the HRE-712 List 2 is not pressurized. The assembly allows the enclosure to breathe and keeps the
internal atmosphere free of harmful contaminants.
Depressurization must be performed every time the cover is removed from either enclosure.
Failure to do so may cause personal injury or damage to the equipment.
Unlike the HRE-712 List 1 unit, the air-pressure cutoff valve in the HRE-712 List 2 unit
cannot be used to cut off an external air source that is applied to the Schrader air-stem
valve. The HRE-712 List 2 air-pressure cutoff valve can only control the air source that is
applied to the enclosure throughout the air-core stub.

150-712-200-02 Overview
HRE-712 List 1 and List 2 July 26, 2000 5
Figure 3. Metal Valves
Brass
fitting Brass
fitting
Body
housing O-rings Adjustment
knob
Limiting
nut
Brass
fitting
O-rings O-rings
O-rings Breather
vent valve Insect
screen
Air inlet
Air outlet
Adapter Breather
adapter
Baseplate
outer surface Baseplate
outer surface
Baseplate
outer surface
Baseplate
outer surface
Baseplate
connection
Cap
Cap
Air stem valve
PRV
A. Pressure ReliefValve (PRV)
B. BreatherVentValve (BVV)
C. Air StemValve (ASV)
(List 2 only)
D. Pressure Cutoff Valve (PCV)
E. Air Stem/Air IntakeT-valve
(List 1 only)
Air stem
valve Valve
cap
Air intake
Baseplate
connection
Cap
F. Air Stem/Air IntakeT-valve
(List 2 only)
Air stem valve

Installation 150-712-200-02
6 July 26, 2000 HRE-712 List 1 and List 2
INSTALLATION
This section describes installation for the HRE-712 List 1 beginning on page 7 and HRE-712 List 2 beginning on
page 11. The installation instructions include:
•Unpacking and Inspecting the Shipment (see “Inspecting Shipment” on page iii)
•Mounting the Enclosure
•Grounding the Enclosure
•Installing Doubler and Repeater Units
•Detaching the Enclosure from the Baseplate
•Opening the Enclosure
•Closing the Enclosure
•Pivoting the Enclosure
PRIOR TO MOUNTING
To prepare the enclosure:
1Remove the HRE-712 from its shipping carton. The dome enclosures and mounting base are packaged
separately within the shipping carton.
2Verify that all equipment listed on the packing list is present.
3Inspect the enclosure, card cage, and O-ring for shipping damage:
4On the rearbase of the card cage, loosen the retaining screws.
5Tilt the card cage on its hinge. Lower the card cage to its level position and tighten the screws to lock it in
position. Always keep the card cage in a level, locked position.
In order to preserve the integrity of the sealed interface between the stub and the metal base,
the stub should not be used as a handle to carry the enclosure or as a means to lower it into a
manhole.
A test card, HTC-439 List 2, is provided free of charge with every HRE-712 to provide an easy
method for you to test the four cable pairs connected to every HRE-712 slot.
The HTC-439 List 2 is shipped in a separate carton within the HRE-712 carton. For information
on using the test card, refer to the accompanying technical practice.

150-712-200-02 Installation
HRE-712 List 1 and List 2 July 26, 2000 7
MOUNTING THE HRE-712 LIST 1
The HRE-712 List 1 may be mounted in a rack, pole, pedestal, or flat surface using the enclosuremounting bracket
assembly. Because of its weight, a vertical orientation is preferred to reduce the thermal stress on the plugs. In
addition, a shady location is preferred. Table 4 on page 26 list the temperature specifications.
This section contains separate mounting instructions for each of these installations as follows:
•Pedestal or pole mounting with a pole diameter of less than or equal to 7 inches (17.78 cm), refer to “Pedestal
or Small Pole Mounting the HRE-712 List 1” on page 8.
•Pole mounting with a diameter greater than 7 inches (17.78 cm), refer to “Large Pole Mounting the HRE-712
List 1” on page 9.
•Flat surface mounting, refer to “Flat Surface Mounting the HRE-712 List 1” on page 9.
•Rack mounting, refer to “Rack Mounting the HRE-712 List 1” on page 10.
Figure 4 below shows the mounting brackets.
Figure 4. Pivot-Mounting Bracket
While mounting the enclosure using any of these procedures, hold the enclosure securely to
prevent personal injury or damage to the enclosure.
Because of the size and weight of the enclosure, you may want to remove the dome before
beginning the mounting procedure. For more information, see “Detaching the Enclosure from
the Baseplate” on page 15.
Mounting bracket
Base-Mounting bracket
Pivot slots
Pivot slots

Installation 150-712-200-02
8 July 26, 2000 HRE-712 List 1 and List 2
Pedestal or Small Pole Mounting the HRE-712 List 1
This procedure details how to mount the enclosure on a pole or pedestal where the pole is less than 7 inches
(17.78 cm) in diameter.
Have the following equipment ready before you begin this procedure:
•Two 3/8-inch (0.952 cm) lag bolts, 4 inches (10.16 cm) long minimum
•Two 3/8-inch (0.952 cm) washers
•One wrench
•One pencil
•One drill with a 1/4-inch (0.635 cm) bit
To mount the enclosure, follow these steps:
1Select a mounting location on the pedestal or pole.
2Remove the mounting bracket from the HRE-712 by removing the four bolts that connect each sideplate as
shown in Figure 4 on page 7.
3Position the mounting bracket against the pedestal or pole. The mounting bracket must be positioned so the
stub will be down. Mark the location of the two center mounting holes. Remove the mounting bracket.
4Drill two 1/4-inch (0.635 cm) diameter holes at the locations marked in Step 3. Each hole should be drilled
approximately 3 inches (7.62 cm) into the pole.
5Start a lag bolt in the top center bottom mounting hole by tightening the lag bolt into the pole or pedestal
approximately 2/3- inch (1.70 cm).
6Insert a lag bolt into the bottom hole of the mounting bracket and tighten the bolt.
7Secure the enclosure bracket to the pole or pedestal by tightening the two lag bolts.
8Reattach the enclosure to the mounting bracket and torque the four mounting bracket bolts 30 to 40
inch-pounds (3.4 to 4.5 Newton-meters).
9If the cable stub connects to an underground cable, dress the cable down the pole or pedestal tothe splice case.
If the cable stub connects to an aerial cable, form a drip loop in the cable and dress it up the pole or pedestal
to the splice case.

150-712-200-02 Installation
HRE-712 List 1 and List 2 July 26, 2000 9
Large Pole Mounting the HRE-712 List 1
This procedure describes how to mount the enclosure on a pole with a diameter greater than 7 inches (17.78 cm).
Figure 4 on page 7 shows the mounting bracket.
Have the following equipment ready before you begin:
•Four 3/8-inch (0.952 cm) lag bolts, 4 inches (10.16 cm) long minimum
•Four 3/8-inch (0.952 cm) washers
•One wrench
•One pencil
•One drill with a 1/4-inch (0.635 cm) bit
To mount the enclosure, follow these steps:
1Select a mounting location on the pole.
2Remove the enclosure base mounting bracket from the mounting bracket by removing the four bolts that
connect each side plate shown in Figure 4 on page 7.
3Position the mounting bracket with the stub down against the pole and mark the location of the top outside
mounting holes. Use the four corner mounting holes for this application. Remove the mounting bracket.
4Drill four 1/4- inch (0.635 cm) diameter holes 3 inches (7.62 cm) deep at the locations marked in Step 3.
5Start an anchor bolt in each of the two top matched mounting slots by tightening the bolts into the pole
approximately 2/3of an inch.
6Insert the lag bolts into the two holes on the outside bottom of the mounting bracket. Tighten the lag bolts.
7Secure the enclosure bracket to the pole by securely tightening all lag bolts.
8Reattach the enclosure base mounting brackets with the four side plate bolts and torque the mounting bracket
bolts 30 to 40 inch-pounds (3.4 to 4.5 Newton-meters).
9If the cable stub connects to an underground cable, dress the cable down the pole to the splice case. If the
cable stub connects to an aerial cable, form a drip loop in the cable and dress it up the pole to the splice case.
Flat Surface Mounting the HRE-712 List 1
This procedure describes how to mount the enclosure on a flat surface. You must allow room for enough top
clearance to remove thecover. Allow at least 5 inches (12.7 cm) of clearance above the dome, if the 31° tilt feature
is used. Allow at least 13 inches (33.1 cm) of clearance, if the tilt feature is not used. Figure 4 on page 7 shows
the mounting bracket.
Have the following equipment ready before you begin this procedure:
•Four 3/8-inch (0.952 cm), 16 NC anchor bolts, 2 1/2inches (6.35 cm) long for wall mounting
•Four 3/8-inch (0.952 cm) washers
•One wrench
•One pencil
•One drill with a 1/4-inch (0.635 cm) bit
To mount the enclosure, perform these steps:
1Select a mounting location on a wall.
2Remove the enclosure base mounting bracket by removing the four bolts that connect each side plate, as
shown in Figure 4 on page 7.

Installation 150-712-200-02
10 July 26, 2000 HRE-712 List 1 and List 2
3Position the mounting bracket against the wall and mark the location of the four outside mounting holes.
Remove the mounting bracket.
4Drill four 1/4-inch (0.635 cm) diameter holes 21/2inches (6.35 cm) deep at the locations marked in Step 3.
5Start an anchor bolt in each ofthe two top, bolt-mountingslots and screw the bolt intothe wall approximately
2/3inch.
6Insert and tighten the anchor bolts in the two bottom mounting holes located on the outside of the mounting
bracket.
7Secure the enclosure bracket to the wall by tightening all anchor bolts.
8Reattach the enclosure base mounting brackets to the mounting bracket with the four side plate bolts and
torque the mounting bracket bolts 30 to 40 inch-pounds (3.4 to 4.5 Newton-meters).
9If the cable stub connects to an underground cable, dress the cable down the wall to the splice case. If the
cable stub connects to an aerial cable, form a drip loop in the cable and dress it up the wall to the splice case.
Rack Mounting the HRE-712 List 1
This procedure describes how to mount the enclosure in a rack.
Have the following equipment ready before you begin this procedure:
•Four 3/8-inch thru-bolts for rack mounting.
•Four 3/8-inch nonmetallic washers.
•One wrench.
To rack mount the enclosure, follow these steps:
1Select a location on the cable rack.
2Position the enclosure so that the holes in the mounting bracket align with the mounting holes in the cable
rack.
3Slide the thru-bolts with nonmetallic washers through the outside slots and holes of the mounting bracket.
Begin tightening the bolts into the mounting holes.
4Secure the enclosure to the rack by tightening the thru-bolts.
5Dress out the stub and attach it to the main feeder cables as described in “Splicing Procedure” on page 29.
6Activate the desiccant bag shipped with the HRE-712 prior to closing the lid by removing the bags from their
plastic containers and placing them inside the enclosure.
Nonmetallic washers are required to avoid a ground loop that may result if both the rack and the
enclosure are grounded. Do not use the rack ground for the enclosureground since its integrity
is not 100 percent reliable.

150-712-200-02 Installation
HRE-712 List 1 and List 2 July 26, 2000 11
MOUNTING THE HRE-712 LIST 2
The HRE-712 List 2 enclosure attaches to a laminated, stainless mounting base which attaches to a rack or flat
mounting surface. The right angle dressing of the HRE-712 List 2 stub precludes vertical mounting to a pole.
This section contains separate mounting instructions for each of these installations as follows:
•Flat surface mounting
•Rack mounting
Flat Surface Mounting the HRE-712 List 2
This procedure describes how to mount the enclosure on a flat surface. Allow at least 10 inches (25.4 cm) of
clearance in front of the enclosure so the cover can be removed.
Have the following equipment ready before you begin this procedure:
•Four 5/8-inch (16 mm) 16 NC anchor bolts, 21/2inches (6.4 cm) long for wall mounting.
•Four 5/8-inch (16 mm) washers
•One wrench
•A pencil
•One drill with a 1/2-inch (13 mm) bit
To rack mount the enclosure, follow these steps:
1Select a mounting location on a wall.
2Remote the mounting bracket from the shipping carton.
3Position the mounting bracket against the wall and mark the locations of the four outside mounting holes.
Remove the mounting bracket.
4Drill four 1/2-inch (13 mm) diameter by 21/2inches (6.4 cm) deep holes at the locations marked in Step 3.
5Attach and secure the baseplate to the mounting surface with the four anchor bolts.
6Attach the enclosure to the baseplate with the four 3/8-inch (9.5 mm) mounting bolts and torque the bolts
30 to 40 inch-pounds (3.4 to 4.5 Newton-meters).
7If the cable stub connects to an underground cable, dress the cable down the wall to the splice case.
If the cable stub connects to an aerial cable, form a drip loop in the cable and dress it up the wall to the splice
case.
The domed enclosures and common mounting base are packaged separately and shipped in a
single carton.
While mounting the enclosure using any of these procedures, hold the enclosure securely to
prevent personal injury or damage to the enclosure.
Because of the size and weight of the enclosure, you may want to remove the dome before
beginning the mounting procedure. For more information, see “Detaching the Enclosure from
the Baseplate” on page 15.

Installation 150-712-200-02
12 July 26, 2000 HRE-712 List 1 and List 2
Rack Mounting the HRE-712 List 2
This procedure describes how to mount the enclosure to the two rack-mounting rails that are customarily used in
manholes.
Have the following equipment ready before you begin this procedure:
•Four 5/8-inch (1.6 cm) thru bolts, 11/2-inches long for rack mounting.
•Four 5/8-inch (1.6 cm) nonmetallic washers. Nonmetallic washers are required to avoid a ground loop that may
result if both the rack and the enclosure are grounded. Do not use the rack ground for the enclosure ground
since its integrity is not 100 percent reliable.
•One wrench
To rack mount the enclosure, follow these steps:
1Position the baseplate on the two mounting rails.
2Attach the baseplate to the mounting rails with the four 5/8-inch (1.6 cm) mounting bolts.
3Slide the thru-bolts with nonmetallic washers through the outside slots and holes of the mounting bracket
shown in Figure 5. Begin tightening the bolts into the mounting holes.
4Dress out the stub and attach it to the main feeder cables as described in “Splicing Procedure” on page 29.
5Activate the desiccant bag shipped with the HRE-712 prior to closing the lid by removing the bags from their
plastic containers and placing them inside the enclosure.
Figure 5. Base Plate Mounting Bracket
6Ground the enclosure as described in “Grounding the HRE-712 List 1 and List 2” on page 13.
7Install doublers or repeaters as described in “Installing Doubler and Repeater Units” on page 15.
8Close the enclosure cover as described in “Detaching the Enclosure from the Baseplate” on page 15.
10.5"
10.5"
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