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Installation ManualM900/M1800 Base Transceiver Station (BTS312)
Hardware Installation5 Installing the Cabinets
03D-0412-20020510- 400 5-1
5 Installing the Cabinets
5.1 Arrangement of Cabinets
If BSC and BTS are in the same equipment room with an additional power distribution
cabinet, it is recommended that a single row arrangement be adopted facilitate cabling.The following two schemes can be used to arrange the cabinets:
I. Ordinary scheme
The distance between the cabinet side and the wall is no less than 0.8m.
The distance between the back of the cabinet and the wall is no less than 1m.
The width of the aisle is no less than 1m in the equipment room.The cabinet should be as close as possible to the feeder window so as to reduce the
length of feeder.
II. Maintenance-free scheme
The cabinet can be placed against the wall, and the distance between the back of thecabinet and the wall is not restricted.
Figure 5 -1 is an illustration of a site with two BTS cabinets (one basic cabinet and one
extension cabinet).
Power distribution room
Transmissionequipment
Maintenance
terminal
F e e d er wi n d ow
Monitoringinstrument
BTS BTS
Basic Extension
Figure 5-1 Plane view of the equipment room
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Installation ManualM900/M1800 Base Transceiver Station (BTS312)
Hardware Installation5 Installing the Cabinets
03D-0412-20020510- 400 5-3
Installation
Locate thecabinet
Insulation test
Install thelower frame
Pass?
Install cabinet
Install theupper frame
End
Figure 5-3 Flow chart of cabinet installation away from the wall
5.3.2 Introduction of Base Assembly
When a cabinet adopts the common floor-supporting installation mode, a base
assembly is used as transit part. As shown in Figure 5-4, the base assembly iscomposed of an upper frame and a lower f rame. Fix the upper frame on the lower part
of th e cabinet, and the lower frame on the cement ground. Then push the upper frameinto the lower frame and lock them to complete the cabinet installation.
(1) Upper frame (2) Lower frame
Figure 5-4 Structure of the base assembly
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Installation ManualM900/M1800 Base Transceiver Station (BTS312)
Hardware Installation5 Installing the Cabinets
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5.3.3 Locating the Cabinet
I. Marking
Define the installation location of the cabinet based on the reference dimension givenin the construction design drawing, measure a few points with a tape measure, and
draw two straight lines parallel to the reference and with a distance of 370 mm inbetween by using an ink string. Then, define the installation hole positions of the firstcabinet on the two lines according to the design requirement, and define the
installation holes of the other cabinets with the holes of the first cabinet as reference.To prevent mistakes, all the installation hole lines should be measure again until theyare confirmed to be correct dimensions. Figure 5-5 shows installat ion holes of a single
cabinet, and Figure 5-6 shows the installation holes of multiple c abinets.
(1) Inner wall or reference property (2) Edge line of cabinet door plate (3) Use M12 expansion bolt
Figure 5-5 Installation holes of a single cabinet
(1) Inner wall or reference property (2) Edge line of cabinet door plate (3) Use M12 expansion bolt
Figure 5-6 Installation holes of multiple cabinets
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Installation ManualM900/M1800 Base Transceiver Station (BTS312)
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II. Drilling
Drill holes on the ground at expansion bolt hole marks with a percussion drill. The drill
bit size should bev14 or v16.
Hold the drilling bit vertical to the ground during drilling. Hold tight the drillstock with
two hands to keep it in the right direction, vibrations of the drill may damage the ground,enlarge the size of the hole or incline the hole.
The depth of the holes should the length of the expansion tube plus the tapered head,
and the depth of all holes should be the same. When checking the depth of the holes,remove the dust from the holes so that the net depth is measured. When drilling the
holes, use a vacuum cleaner to clean the dusts.
If the ground is too hard and smooth to settle the drill bit, punch a pit with a chisel
before drilling.
In the case of av14 bit, and if the hole size is small, the holes can be enlarged bymeans of technical processing.
As the line drawing and hole drill ing jobs are the fundam ental work for hardware
installation, any bad precision will bring great troubles to the follow-up jobs. Therefore,the guarantee of these jobs is a necessary condition for the quality of the wholeproject.
5.3.4 Installing the Lower Frame
I. Installing the expansion bolt
Before the installation, remove the dust inside and outside the holes, and then check
the hole distance. Whenever big errors occur, the concerned hole must be re-locatedand drilled.
Put the expansion bolts and the expansion tubes perpendicularly into the installationholes. Strike directly on the bolts with a rubber hammer until the expansion tubes of the
expansion bolts are totally driven into the ground. Then, install the insulating washers,big flat washers (to replace the washers contained in the expansion bolts), spring
washers and nuts on the expansion bolts. Tighten the nuts to 45 N∃m. Pull the
expansion bolt until it expands totally. Finally, take down the nuts, spring washers andflat washers.
II. Installing the lower frame
Follow the instructions shown in Figure 5-7 to install and fix the lower frame. Fit the
installation holes of the lower frame to the corresponding expansion bolts. Fix the big
base to the ground with nuts, spring washers and big flat washers. Use a torque
wrench to tighten the nut and make the torque at 45 N∃m. At this step, it is necessaryto install insulating spacer and insulating washer to ensure the insulation between the
cabinet and the ground.
The nut used for fixing the lower frame should be tightened alternatively to reduce the
stress between the bolt and the lower frame.
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Installation ManualM900/M1800 Base Transceiver Station (BTS312)
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(1) Nut M12 (2) Spring washer ?12 (3) Big flat washer ? 12 (4) Insulating washer (5) Lower frame (6) Insulating spacer (7) Washer (8) Expansion bolt M12% 80
(9)Installation direction
Figure 5-7 The lower frame installation
5.3.5 Insulation Test
Set the multimeter at the resistance measurement position. Place the two measuring
heads of the multimeter in contact respectively with cabinet and the expansion bolts tothe measure the resistance. If the circuit is disconnected, complete the installation.
Otherwise, it indicates that the cabinet is not insulated. In this case, check if any
insulating washer or insulating spacer is missed, or if any insulating washer isdamaged. Repeat the procedure as given in "II. Installing the lower frame" of Section
5.3.4 and then check the insulation again.
5.3.6 Fixing the Cabinet
Place the cabinet on the upper frame, and use the fastener to fix the cabinet to theupper frame through the four fixing holes from top to bottom. See Figure 5-8.
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Installation ManualM900/M1800 Base Transceiver Station (BTS312)
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(1) Bolt M12 X 15 (2) Spring washer ?12 (3) Big flat washer
(4) Insulating washer (5) Upper frame of the base
Figure 5-8 Installation of the cabinet and the upper frame
5.3.7 Installing the Cabinet
I. Fixing the upper frame
Raise the upper frame onto the lower frame. Push in and fix the cabinet with bolts, as
shown in Figure 5-8. Place the cabinet installed with the upper frame to the front of the
lower frame. Align the cabinet and the lower frame. Push the cabinet into the lower
frame until the upper and the lower frames fit in. Fasten the bolts to complete theinstallation of the cabinet, as shown in Figure 5-9.
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II. Leveling the cabinet
Place a level bar in vertical direction on the top -plane of the cabinet to check the
leveling of the cabinet. When errors exist, adjust the leveling by adding spacersbeneath the lower frame, as shown in Figure 5-9 .
(1) Spring washer ?12 (2) Bolt M12 X 30 (3) Flat washer ? 12 (4) Base components
Figure 5-9 Installation of the cabinet against the wall
5.4 Installation Against the Wall
When the distance between the backplane of a cabinet and the wall is less than 800millimeters, it is installed against the wall.
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Caution:
In consideration of the cooling requirement, the distance between backplane of the cabinet and the wall
should be no less than 100 mm.
5.4.1 Installation Procedure
Start
Locating thecabinet
Fixing the cabinet
Insulation test
Passed the test?
End
Y
N
Figure 5-10 Cabinet installation flowchart on the cement ground
5.4.2 Locating the Cabinet
I. Marking
Determine the installation position of the supports according to the benchmarkdimensions and the support dimensions specified in the construction plan. Specify
several points for line drawing with a tape measure and draw two straight lines parallelto the benchmarks, with the spacing of 370 mm. Then determine the hole position for
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Installation ManualM900/M1800 Base Transceiver Station (BTS312)
Hardware Installation5 Installing the Cabinets
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the first support on the two lines as designed. With this hole as a reference, specify the
installation hole position of the other support. To be on the safe side, repeatedmeasurements are required until the dimensions are correct. Figure 5-11 is the
installation hole diagram for the single cabinet and the Figure 5-12 is the installation
hole diagram for multi -cabinets.
(1) Inner wall or reference property (2) Edge line of cabinet door plate (3) Use M12 expansion bolt
Figure 5-11 Installation holes of a single cabinet
(1) Inner wall or reference property (2) Edge line of cabinet door plate (3) Use M12 expansion bolt
Figure 5-12 The installation holes of multiple cabinets
II. Drilling
Drill holes on the ground at expansion bolt hole marks with a percussion drill. Choosethev14 or v16 drill bit.
Hold the drilling bit vertical to the ground during drilling. Hold tight the drillstock with
two hands to keep it in the right direction, vibrations of the drill may damage the ground,enlarge the size of the hole or incline the hole.
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The depth of the hole should be the length of the expansion bolt sleeve plus the drill bit
and the depths of respective holes should be consistent. Before measuring the depthof the holes, the dust inside the hole should be removed with a vacuum cleaner.
If the ground is too hard and smooth to settle the drill bit, punch a pit with a chiselbefore drilling.
The line-drawing and hole-drilling is the fundamental work for hardware installation, if
the accuracy is not high enough, the future work will be greatly impacted. Thus thegood quality of this work is the necessary precondition to guarantee the quality of theoverall construction.
& Note:
The latter steps required for the installation are omitted here as they are the same as in section 5.3.
5.5 Installation on Ground with Insufficient Load Bearing
Capacity
5.5.1 Introduction to the Installation
When the allowable load bearing of the ground is lower than 4.0 kN/m2, it is
recommended that the cabinets are installed against the wall (please refer to Section
5.4). In this case, the relations between the maximum allowable distance from thecabinet backplane to the wall surface, the ground load and the floor span are shown in
Table 5-1.
Table 5-1 Relations between the maximum allowable distance from cabinet rear panel to the wall, the
ground load and the floor span
Max. allowable distance between
rear panel and wall (mm) Allowable evenly distributed load of the ground (kN/m2)
1.5 1.8 2.0 2.5 3.0
3.0 100 140 190 320 480
3.3 110 190 250 400 590
3.6 180 280 350 550 800
Floor span (m) 3.9 260 380 470 720 1060
Caution:
When combined cabinets are installed against the wall in buildings constructed with pre-casted floors, payattention to the installation direction of the cabinets. It is not allowed to install more than two cabinets on
the same block of floor, as shown in Figure 5-13, and it is not allowed to place heavy objects within 1.5
meters' reach of the cabinets.
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(1) (5) Cabinet (2) Floor (3) Correct installation direction (4) Wrong installation direction
Figure 5-13 Sketch of combined cabinet direction
If the cabinet cannot be installed against the wall, an extended base should beemployed to reduce the load for the ground. Figure 5-14 shows the completed
installation of the cabinet on the extended base.
(1) Extended base
Figure 5-14 Completed installation of BTS312 cabinet on the extended base
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5.5.2 Brief Introduction to the Extended Base
If a cabinet cannot be installed against the wall, an extended base assem bly isemployed as provisional part to reduce the load of the cabinet for the ground. The
physical dimensions of the extended base assembly are 3000 mm%616 mm%100 mm
(L % W % H), as shown in Figure 5-15. First, fix the extended base assembly on thecement ground, then lay a checkered aluminium plate on it, and finally complete the
cabinet installation. The cabinet can be moved back and forth on the extended baseassembly at the interval of 185 mm.
Figure 5-15 Schematic diagram of the extended base
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5.5.3 Installation Flow
Installation on ground withinsufficient load bearing capacity
Complete the installation
Insulation test
Install the checkered plate
Cabinet installation
Install the extended base
Assemble the extended base
Locate the extended base
Test passed?N
Y
Figure 5-16 Flow chart of cabinet installation on an extended base
5.5.4 Assembling the Extended Base
Use connecting channel-steels and fasteners to connect the main base assembly and
the lengthened base assembly on the site, thus complete the assembly of theextended base assembly, as shown in Figure 5-17.
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( 1 )
( 2 )
( 3 )
( 4 )
(1) (4) Extended base assembly (2) Connecting channel steel (3) Main base assembly
Figure 5-17 The extended base assembly
5.5.5 Locating the Extended Base
I. Marking
Define the installation location of the cabinet based on the reference dimension givenin the construction design drawing, measure a few points with a tape measure, and
draw two straight lines parallel to the reference and with a distance of 566 mm inbetween by using an ink fountain. Then, define the first installation hole position of theextended base assembly on the two lines according to the design requirement, and
define the other installation holes with this hole as reference. To prevent mistakes, all
the installation hole lines should be measured again until they are confirmed to becorrect dimensions. Figure 5-18 shows the hole positions of single -cabinet installation
and Figure 5 -19 shows the hole position of dual- cabinet installation. For the installationof multi-cabinets, refer to the installation of dual -cabinets.
(1) Edge line of extended base (2) M12 expansion bolt
Figure 5-18 Single-cabinet installation holes
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(1) Edge line of extended base (2) M12 expansion bolt
Figure 5-19 Two-cabinet installation holes
II. Drilling
Drill holes on the ground at expansion bolt hole marks with a percussion drill. The drill
bit size should bev14 or v16.
Hold the drilling bit vertical to the ground during drilling. Hold tight the drillstock with
two hands to keep it in the right direction, vibrations of the drill may damage the ground,enlarge the size of the hole or incline the hole.
The depth of the hole should be the length of the expansion bolt sleeve plus the drill bit
and the depths of respective holes should be consistent. Before measuring the depth
of the holes, the dust inside the hole should be removed with a vacuum cleaner.
If the ground is too hard and smooth to settle the drill bit, punch a pit with a chiselbefore drilling.
In the case of av14 bit, and if the hole size is small, the holes can be enlarged by
technical means.
The line-drawing and hole-drilling is the fundamental work for hardware installation, if
the accuracy is not high enough, the future work will be greatly impacted. Thus thegood quality of this work is the necessary precondition to guarantee the quality of the
overall construction.
5.5.6 Installation of Extended Base
I. Installing the expansion bolts
Before fixing the expansion bolts, clean up the dust inside and outside of the holes wi tha vacuum cleaner and measure the hole spacing. For the hole with intolerable error, it
is required to relocate and drill the holes.
Remove the washer and nut from the expansion bolt, put the expansion bolt and the
sleeve into the hole vertically. Then, strike directly on the bolt with a rubber hammer
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until the sleeve of the expansion bolt is completely driven into the ground. Then, install
the insulating washers, big flat washers (to replace the washers contained in theexpansion bolts), spring washers and nuts in the expansion bolts. Fasten the nuts to
45 N∃m with a torque wrench. Pull the expansion bolt until it expands totally. Finally,
take down the nuts, spring washers and flat washers.
II. Installing the extended base
Align the installation holes of the extended base assembly to the corresponding
expansion bolts. Use nuts, spring washers and flat washers to fix the extended baseassembly on the ground. Then tighten bolt to 45 Nm (torque) with a Torque spanner.
Fasten the nuts on the extended base assembly alternatively to reduce the stress
between the bolts and the extended base.
5.5.7 Install the Checkered Plate As shown in Figure 5-20, install the checkered aluminium plate on the surface of the
extended base assembly with M5X10 sunk screws.
(1) Checkered aluminum plate (2) M15 sunk screw
Figure 5-20 Checkered aluminum plate installation
5.5.8 Cabinet Installation
I. Installing the cabinet
When installing and fixing the cabinet, install the insulating spacer and the insulating
washers as shown in Figure 5-21. Secure the cabinet on the extended base assemblywith bolts and washers. Tighten the bolt to 45 Nm (torque) with a Torque spanner. Then,
make sure that the washers attached with the expansion bolts are replaced with big flatwashers.
Fasten the bolts alternatively to reduce the stress between the bolt and the lower frame.
Make sure that insulating spacers are added under the cabinet and insulating washers
are installed in the fasteners so that the whole equipment is insulated from the ground
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before connected with the ground cable, thus effectively satisfy the insulation
requirement.
II. Leveling the cabinet
Place a level bar in vertical directions on the top-plane of the cabinet to check theleveling of the cabinet. Adjust the leveling by adding spacers beneath the base of thecabinet if the error exists, as shown in Figure 5-21.
(1) M12%35 bolt (2) Spring washer 12 (3) Big flat washer (4) Insulating washer
(5) Washer (6) Insulating spacer
Figure 5-21 BTS312 cabinet installed on an extended base
5.5.9 Insulation Test
Set the multimeter to the ohm range and measure the resistance between the cabinet
and the extended base. If the circuit is disconnected, it indicates that the cabinet is notinsulated. In this case, check if any insulating washer or insulat ing spacer is missed, or
if any insulating washer is damaged. Repeat the cabinet installation procedure andthen check the insulation again.
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5.6 Installation on the Anti-static Floor
A600 series supports are adopted for BTS312 cabinet installation in the equipment
room with anti-static floor.
5.6.1 Brief Introduction on the Supports
I. Profileof the supports
(1) Connecting holes of BTS cabinet (2) Upper support (3) Lower support (4) Installation hole
Figure 5-22 The profile of A600 series support
II. Support assemblies
There are four types of A660 series support assemblies: three adjustable assemblies
and one fixed assembly. For the adjustable heights of each assembly, refer to the tablebelow.
Table 5-2 Table ofadjustable heights of B550 series support assemblies
Assembly Applicable antistatic floor height (mm)
I 195~230
II 231~300
III 301~445
IV Customized for the flooring height (minimum height 140 mm)
Note that the antistatic floor height refers to the distance between the upper surface of the antistatic floor and the concrete ground.
The heights of A600 series I, II, III assemblies can be adjusted stepless within their
adjustable ranges. The heights are adjusted by moving the upper and lower supports.
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A600 series IV assemblies are fixed supports. They mainly apply to ultrahigh and
ultra-low floors. The minimum applicable floor height of this assembly is 140 mm.
III. Support installation mode
The installation of support adopts the floor-bracketing mode, that is, bracket the floor inbetween the cabinet and the support. Then, run the bolts through the antistatic floor tofix the cabinet and the support. In this way, the cabinet can be firmly fixed and
supported.
IV. Support quantities
2N installation supports are used for installing the cabinets, i.e., N cabinets should be
supported with 2N supports. Figure 5-23 is the schematic diagram of BTS312 cabinetinstallation on the antistatic floor.
Figure 5-23 BTS30 cabinet installation on the antistatic floor
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5.6.2 Installation Process
Fixing the suppor t
Cabinet installation
Positioning thesupport
Locating the cabinet
Start the installation
Insulation test
Test passed?
Complete the
installation
Figure 5-24 Flow chart of installation on the antistatic floor
5.6.3 Positioning the Cabinet
I. Locating the cabinet
Determine the location for power cabinet installation according to the equipment room
layout. When locating the cabinet, try to avoid the interference between the installationsupports and the antistatic floor framework. Try as much as possible to keep the
intactness of the framework. If the interference is unavoidable, remove the floor framework at the place where the interference occurs during the instal lation.
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II. Marking
Place the template on the antistatic floor in accordance with the cabinet layout. Mark
the connecting holes (each cabinet has four connecting holes) of all the cabinets onthe ground according to the template diagram. See the template diagram in the Figure
5-25. The semicircle notch of the template indicates the right ahead direction for thecabinet.
III. Drilling holes
Remove the template and drill a through hole at the marked place for each connecting
hole on the antistatic floor with av20 drill bit.
Back
Front
RightLeft
Connecting hole
Figure 5-25 Marking and drilling for the BTS312 cabinet
5.6.4 Locating the Support
I. Positioning and marking for the support
Place the support below the antistatic floor. Align the connecting holes of the support
with the holes on the antistatic floor. Take the installation hole of the support as the
template. Mark the position for the expansion bolt on the cement ground.
Caution:
The connecting holes at the outer side of the support should be aligned with the floor holes as is shown in
Figure 5-26. The support should not stick out of the cabinet.
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(1) Antistatic floor (2) Connecting hole (use the outer side)
Figure 5-26 The connection between the connecting holes of the support and the holes on the antistaticfloor
II. Drilling
Use av16 bit to drill a hole that is 70 mm deep on the ground where it is marked with
the expansion bolt.
Hold the percussion drill (or electric rubber) vertical to the ground during drilling. Holdtight the drillstock to keep in the right direction, vibrations may damage the ground and
incline the hole.
Before drilling, use a vacuum cleaner to remove the dust. Clear all the garbage in theequipment room before the staffs leave the equipment room every day.
If the ground is too hard and smooth to settle the drill bit, punch a pit with a chisel tohelp positioning the hole.
Drawing and drilling is the fundamental for the equipment hardware installation. If the
results are not accurate, it will bring trouble for the future work. Therefore, the quality atthe initial stage is the prerequisite for the quality of the whole project.
III. Installing expansion bolts
Before fixing the expansion bolts, clean the dust inside and outside the hole with avacuum cleaner, then measure the hole diameters. For the hole with intolerable error, it
should be located and drilled again.
Put the expansion bolts perpendicularly into the installation holes. Strike carefully on
the bolts with a hammer until the expansion tubes of the expansion bolts arecompletely buried into the ground. Then, install the insulating washer, big flat washers
(to replace the washers contained in the expansion bolts), spring washers and nuts in
the expansion bolts. Tighten the nuts to 45 N∃m with torque wrench. Pull theexpansion bolt until it expands totally. Finally, take down the nuts, spring washers and
flat washers.
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IV. Adjusting the height of support
Adjust the supports to the predefined heights, finely adjust the height-lock bolt of the
support on the upper support to such an extent that they will not slip down. Put thesupport back to its installation position and run the expansion bolt through the
installation hole of the support.
5.6.5 Fix the Support
Align the hole on the antistatic floor with the connecting holes of the support . Screw the
M12 % 75 bolts from top to bottom. Meanwhile, place the flat washer, spring washer,
and insulating washer (for the purpose of increasing the contact area) as is shown inFigure 5-26.
Gently strike the hammer to finely adjust the support height so that the antistatic floor falls on its original place on the framework. Make sure that that the upper plane
presses against the antistatic floor. Then, screw the tightening bolt on the antistaticfloor.
Tighten the expansion bolt to 45 Nm with a Torque spanner. Fasten the boltsalternatively to reduce the stress between the bolt and the supports.
Tighten the height-lock bolt to 45 Nm with a Torque spanner. The bolts in the middle
should be tightened first and then those at both sides. Figure 5-27 is the bolt positiondiagram.
& Note:
The fastening sequence of the three bolt sets should be performed in strict accordance with the
above-mentioned procedure.
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(1) Spring washer 12 (2) M12%75 bolt (3) Flat washer 12
(4) Insulating washer (5) Antistatic floor (6) Height-lock bolt (in the middle)
(7) Anchor bolt for the floor (8) Height-lock bolt (at the side) (9) Expansion bolt
The bolt fastening sequence: anchor bolt for the floor δexpansion boltδheight-lock bolt (first in the middle and then thesides)
Figure 5-27 Position of fastening bolts
5.6.6 Cabinet Installation
Restore the antistatic floor to its original status.
Remove the fixed bolts of the antistatic floor.
Uplift the cabinet to the predefined location. Use the bolts to connect the cabinet to the
antistatic floor and the supports. Note that at this step, it is necessary to cover the boltswith insulating washers as shown in Figure 5-27 .
5.6.7 Insulation Test
Set the multimeter to ohm range. Contact the cabinet and the connecting bolt with the
two probes of the multi -meter. Measure the electric resistance between them. If thecircuit is disconnected, complete the installation. Otherwise, it indicates that the
cabinet is not insulated. In this case, check if any insulating washer or insulatingspacer is missed, or if any insulating washer is damaged. Repeat the cabinetinstallation procedure and then check the insulation again.
5.7 Connection and Fixing of Combined BTS312 Cabinets
For cabinets to be combined, remove the shield cover plate on the combined cabinets
and the fasteners, and adhere shielding strips on the surface of the combined cabinet joints. When all the cabinets are in position, they should be tightly appressed. Run thefasteners through the connecting holes (four holes) the on the cabinet side to connect
the two cabinets, as shown in Figure 5-28 and Figure 5 -29, and then use fasteners toconnect the cabinets at the cabinet-top, as shown in Figure 5 -30.
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During the installation, make sure to protect the cabinets from being damaged or
scratched by the tools.
(1) Shield cover and fastener of the side door
Figure 5-28 Removal of the shield cover and fasteners of combined cabinet
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(1) Shielding strip and fasteners for combined cabinets
Figure 5-29 Removal of the shield cover and fasteners of combined cabinets
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(1) Joint piece (2) M12 screw (3) Spring washer φ12 (4) Flat washer φ12
Figure 5-30 The connection at the top of combined cabinets
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5.8 Antistatic Requirements for Installing Boards and Modules
Each board and module have static-sensitive parts, therefore, keep the following
antistatic requirements in mind when installing and replacing the boards or modules:
1) Before installing the boards or modules, insert the plug of the antistatic wrist strap inthe antistatic socket of the cabinet side door. See Figure 5-31.
& Note:
If the antistatic wrist strap has a clip, remove the clip to reveal the plug.
2) Put the antistatic wrist strap on the wrist (it can be on the left han d or the right hand,and it is subject to the convenience);
3) Keep the antistatic wrist strap on the wrist throughout the entire installation
procedure, as shown in Figure 5-32;4) Wear the antistatic wrist strap when removing or replacing boards or modules.
Figure 5-31 The antistatic wrist strap is inserted in the antistatic socket
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Figure 5-32 Operation with antistatic measurement
5.9 Installation of Switch Box, Fan Box and Plug-in Frame
The cabinet holds the switch box, big fan box, TRX & CDU plug-in frame, air guide box,
small fan box, common resource plug-in frame and air intake box from top to bottom.In the maintenance of the cabinet, these plug-in frames and plug-in boxes may beinserted and extracted.
Caution:
The insertion and the extraction of the plug-in frame/box must be undertaken by qualified personnel
trained by Huawei. The air guide box and air intake box are part of plug-in frame and they have to be
inserted or extracted together with the plug-in frame.
5.9.1 Installing the Fan Box
When installing the fan box, push it slowly along the slide first. After pushing it to theposition, tighten the screws on the panel, as shown in Figure 5 -33. The procedure of
removing the fan box from the cabinet is exactly reversed.
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(1) Big fan box (2) Small fan box (3) Guide rail (4) Guide rail
Figure 5-33 Installation of the fan box
Caution:
1) During installation of the fan box, align the 4 power plugs on the back of the fan box with the power sockets on the cabling rack on the back of the cabinet.
2) During the removal of the fan box, pull it out slowly to avoid damage to the power plugs and sockets.
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5.9.2 Installing Other Boxes
When installing the switch box, windshield box, and air guide box, first push themslowly along the guide. After they are in position, tighten the screws on the panel. The
removal procedures are reversed.
Caution:
Since there are many power cables in the switch box, there is a limited room for one to pull them out. Do
not pull them violently, or the power plug on the backplane might be pulled off.
5.10 Installation of Boards
Caution:
Before installing a board or module, please confirm whether it is necessary to set the DIP switches or
jumpers on the backplane or on the board/module.
Please refer to "6 DIP Switch Settings" for the setting of DIP switches and jumpers.
Common resource plug-in frame is at the bottom of the cabinet. The boards in this
frame are all ordinary boards. There are some connectors on the rear side of theboards, which are connected to the backplane. There is a metal handle bar on the
facade of the board, which is used to insert and extract the boards.
Please install the boards with the following procedure:
1) Align the board with the slot and push it slowly along the guide rail until it cannot be
pushed any further.
2) Tighten the screws on the panel.
Caution:
1) Before the installation, please clean the cabinet and the frame first.
2) Please wear antistatic wrist strap, or discharge the static on the body by touching the case before
touching the board.
3) Please insert the board according to the label pasted on the name plate. Do not insert the board into a
wrong slot.
4) Insert the board into the frame vertically and the boards are interconnected through the system bus on
the backplane.
5) Do not force the board into the slot to avoid damage to the pins.
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5.11 Installation of Functional Modules
CDU, TRX, PSU and PMU modules are installed respectively in TRX & CDU frame
and common plug-in frame.
When installing CDU, TRX, PSU and PMU modules, a lign the board with the positionsmarked with their corresponding board name. Push them slowly along the guide and
tighten the screws.
Figure 5-34 shows the installation procedure of TRX module, the installation of other
modules is similar to this.
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(1) TRX
Figure 5-34 Installation of TRX module
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Caution:
When screwing the anti-loose screws, do not increase your force if there is some difficulty in driving the
screw in, so as to prevent from breaking the screw. The right method is to re-install functional module, to
fit its installation hole to the installation hole of the frame.
5.12 Installation of Front/Rear Door
In the maintenance of the cabinet, it may need to remove the front door and the rear door.
5.12.1 Removal of the Front Door
Open the front door and operate in the following way to remove the door, as shown in
Figure 5-35:
1) Open the front door to form an included angle bigger than 90°with the cabinet so
as to see the door pin and the hinge.
2) Uplift the front door so as to separate the door pin from the hinge of the cabinet.
3) After the door pin has been separated from the hinge, remove the front door.
Figure 5-35 Install/Remove the front door
The procedure of door installation is just the opposite as the above-mentioned steps.
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Caution:
1) To close the door, first press against the door and then rotate the locking stalk clockwise.
2) When removing the front door, take out the grounding cable on the front door first and reconnect the
grounding cable after the front door is installed.
5.12.2 Removal or Installation of the Rear Door
The installation or removal of the rear door can be realized by installing/ removing the
six screws on the rear door.
Caution:
When the cabinet is installed against the wall, first remove the cabinet from the installation base and then
proceed to the removal of the rear door.
5.13 Installation, Removal and Dust Cleaning of the Dust Filter
BTS dust filter is installed on the front door, between the front door and the cover plateof dust filter, as shown in Figure 5-36.
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(1) Dust filter (2) Fastener (3) Holddown of dust filter
Figure 5-36 Cover plate of dust filter and the dust filter
When installing the dust filter, first put it in the corresponding cover plate along theguides. Pay attention to the burrs on the dust filter to avoid any scar on the cover plate
or the guides, as shown in Figure 5-37.
(1) Sliding rail (2) Cover plate of dust filter (3) Dust filter (4) Stop screw
Figure 5-37 Placing the dust filter in the cover plate
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Then, insert the dust filter cover (including the dust proof screen) into the slot of the
front door. Then, tighten the screws on the bolts of the cover plate on the front door, asshown in Figure 5-38.
(1) Unfix the fastener (2) Remove the dust filter along the arrow direction (3) Uplift the dust filter
Figure 5-38 Installation of the dust filter
The removal of the dust filter is undertaken in the reversed procedure of its installation.
Clean the dust filter with a vacuum cleaner.
Caution:
When cleaning, remove the dust filter first and then place it on the desk. Clean the filter with a vacuum
cleaner. After certain period of service, replace it in time.
5