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Two types of N68 cabinets are available. One is
1.8-meter-tall N68 cabinet, whose available space is 37 U; and the other is
2.2-meter-tall N68 cabinet, whose available space is 46 U. The installation
requirements for both types of cabinets are the same, such as space planning,
positioning and fixing cabinets.
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The following sections describe how to install
the 2.2-meter-tall N68 cabinet (N68-22) in details.
The dimensions of the N68-22 cabinet are
2200 x 600 x 800 mm (86.6 x 23.6 x 31.5 in.) (H x W x D), as shown in Figure 1-1.
Figure 1-1
Dimensions of the N68-22 cabinet
Before installing the cabinet, you need to
plan installation space first. Sufficient space must be provided in front of
and at the back of the cabinet for maintenance. Figure 1-2 describes the planning of
installation space for a single cabinet. Figure 1-3 describes the planning of
side-by-side cabinet installation.
Figure 1-2
Planning of installation space for a single cabinet
(in mm)
Figure 1-3
Planning of side-by-side cabinet installation (in
mm)
Follow the given steps to do the
installation preparation:
1)
Draw lines correctly to avoid rework.
2)
Unpack the cabinet and the cabinet accessories
according to the operation guide.
Caution:
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If you need to install feet for the cabinet on concrete
floor, refer to Chapter 4 Installing Accessories”. Then proceed with step 3.
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After installing feet, you must fix the cabinets
to avoid accidents.
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You can use supports to install cabinets on
antistatic floor. You do not need to install feet.
The way of fixing
the cabinet with feet is not recommended.
3)
Put the rack in the upright position, and then
remove wood boards and support wood bars from the back with a cross-head
screwdriver. Put the removed boards and bars in a safe place to avoid injury.
Keep the removed screws for later use.
Figure 1-4 Remove support bars
The weight of an
empty N68-22 cabinet is 160 kg and that of an empty N68-18 cabinet is 120 kg. Before
installing the cabinets, you must check load-bearing capacity of the floor as
required.
Based on the floor types, the N68-22
cabinet can be installed on the concrete floor or anti-static floor.
Figure 1-5 describes the installation flow of the N68-22 cabinet.
Figure 1-5
Installation flow of the N68-22 cabinet
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If the cabinet is installed on the concrete
floor, after fixing the cabinet, you can install the cabinet accessories
directly.
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If the cabinet is installed on the anti-static
floor, after fixing the cabinet, you need to install anti-static floor holders
and recover the floor, and then install the cabinet accessories.
This chapter describes how to install the
N68 cabinet on the concrete floor by taking the N68-22 cabinet as the example.
The dimensions of the N68-22 cabinet are
2200 x 600 x 800 mm (H x W x D). The available space inside the cabinet is 46
U. You can install cabinets with or without feet based on your requirements.
Caution:
You must install
insulation components correctly to avoid connectivity with the ground before
the ground cables are connected, thus satisfying insulation requirements.
When installing a cabinet with feet on concrete
floor, you need to use anchor plate components to fix the cabinet. Considering
that the floor is not flat, the height of the feet can be adjusted.
Caution:
Feet provide insulation
and there are insulators in anchor plate components. These insulation
components should be installed correctly so that the equipment is insulated
from the ground before grounding cables are connected, thus meeting the
insulation requirements.
I. Components of an anchor plate
N68 anchor plate components consist of an
anchor plate and expansion bolts.
Figure 2-1 illustrates the components of the anchor plate.
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(1) Bolt M12×70
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(2) Spring washer 12
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(3) Big flat washer 12
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(4) Insulation washer
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(5) Anchor plate
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(6) Insulation pad of the anchor plate
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(7) Expansion tube
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(8) Expansion bolt
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(9) Foot connection notch
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(10) Connection hole
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Figure 2-1
Components of the anchor plate
II. Foot components
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(1) Fastening nut for cabinets
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(2) Fastening nut for anchor plates
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(3) Leveling nut
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(4) Foot
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Figure 2-2 Foot components
III. Installing a cabinet with
feet
Figure 2-3 illustrates the flow of installing the N68-22 cabinet on the concrete
floor.
Figure 2-3
Install cabinets with feet on the concrete floor
I. Determining where to install
the cabinet
Before installing the cabinet, you need to
plan installation space first. Sufficient space must be provided in front of
and at the back of the cabinet for maintenance.
II. Drawing lines
You can draw lines in two ways: determining
installation hole positions based on layout design and determining installation
hole positions based on the template.
Table 2-1 Determine
mounting hole positions based on the layout
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Step
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Operation
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Remarks
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1
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Determine the installation positions of
the expansion bolts according to the dimensions specified in the construction
plan and the mounting hole dimensions.
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Figure 2-4 shows installation positions of the expansion bolts and feet for
a single cabinet. Figure 2-5 shows installation positions of the expansion bolts and feet used
to combine a row of cabinets.
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2
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Mark several points for drawing with a
steel tape, and then draw two straight lines parallel to the benchmarks, with
the spacing of 687 mm (27.0 in.).
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—
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3
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Determine the hole positions of the
expansion bolts for the first cabinet and foot positions on the two lines as
designed.
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—
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4
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With these holes as reference, mark the
mounting hole positions of the expansion bolts for other cabinets and foot
positions.
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—
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5
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Measure and confirm hole sizes again.
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—
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(1) Hole for fixing an expansion bolt
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(2) Mark for positioning feet
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(3) Cabinet outline
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(4) Inner wall or reference body
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Figure 2-4
Installation positions of the expansion bolts and
feet for a single cabinet
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(1) Hole for fixing an expansion bolt
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(2) Mark for positioning feet
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(3) Cabinet profile
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(4) Inner wall or reference body
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Figure 2-5
Installation positions of the expansion bolts and
feet used to combine a row of cabinets
Table 2-2 Determine
mounting hole positions based on the template
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Step
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Operation
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Remarks
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1
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Put the
drawing template on the floor as required.
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Figure 2-6 shows the drawing template.
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2
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Mark the positions of all the expansion
bolts and the feet on the floor according to the template. The semi-circle
notch of the template indicates the front of the cabinet.
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Each cabinet needs four expansion bolt
holes.
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Caution:
Make sure that the
template direction is correct.
Figure 2-6
Drawing template (only for the concrete floor)
III. Drilling holes
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Use M12 expansion bolts to fix supports on the
ground. Use a percussion drill with Ф16 bit to drill holes.
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When drilling holes, hold the drill handle
firmly with both hands, keeping the bit perpendicular to the floor to prevent
damages to the floor or tilted holes.
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The depth of the holes should range from 52 mm
to 60 mm (2.0 in. to 2.4 in.). All the holes should have the same depth. After
drilling a hole, use a dust collector to clean the dust inside and outside the
holes before measuring the hole depth.
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The bit is difficult to position on the floor
that is hard and smooth. In this case, punch a small hole on the marks for the
mounting holes before drilling.
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Note that the precision of marking and drilling
is essential to hardware installation. Low precision can cause many problems
during installation.
Caution:
The depth of
drilling is between 52 mm and 60 mm (2.0 in. to 2.4 in.). Otherwise, you will
be unable to install or fasten the expansion bolts.
IV. Installing expansion bolts
Prior to installation, clean dust inside
and outside the holes with a dust collector and then measure the spacing of
holes. If errors are not acceptable, you must position and drill the holes
again.
Take down the expansion tube and expansion
nut, and insert the alignment rib on the expansion nut into the slit of
expansion tube. Punch the expansion tube with rubber hammer until the expansion
tube is completely buried in the floor.
Figure 2-7 illustrates how to install an expansion nut onto an expansion tube.
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(1) Expansion tube
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(2) Slit
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(3) Expansion nut
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(4) Alignment rib
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Figure 2-7
Install an expansion nut onto an expansion tube
Caution:
You must insert the
alignment rib of expansion nuts into the slits of the expansion tubes first;
otherwise you will be unable to install or fasten the expansion bolts.
I. Position the cabinets
Install the cabinets in the planned
position and align four feet of the cabinet with four foot marks on the floor,
and then align all the cabinets.
II. Level the cabinets
Loosen the nuts used for fastening
cabinets, and then place two spirit levels along two sides perpendicular to
each other on the top of the cabinets to check levelness. If any cabinet is out
of levelness, adjust the levelness by turning screws on feet with a wrench, and
align all the cabinets, as shown in Figure 2-8.
Figure 2-8
Level a cabinet
III. Fastening cabinet feet
Fasten all the nuts
used for fastening cabinets on all the feet so that the nuts for fastening
cabinets can be against the nuts on the holder, as shown in Figure 2-9.
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(1) Welded nut on the foot holder
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(2) Nut for fastening the cabinet
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Figure 2-9
Fasten feet
2.1.3 Fixing
the Cabinets
Caution:
When combining two
or more cabinets, you have to combine the cabinets first, and then fix anchor
strips.
I. Installing an anchor plate
Loosen the nuts used for fastening the
cabinet and turn them upward by more than 10 mm (0.4 in.), and then install
anchor plates according to the direction indicated by the arrow, as shown in Figure 2-10.
The anchor plates must press the cabinet feet. One cabinet needs four anchor
plates.
Caution:
Anchor plates must
be installed according to the direction indicated by the arrow in the following
figure.
Figure
2-10 Install anchor plates (on concrete floor)
II. Installing insulation
components and fixing anchor plates
Put the insulation pad under the anchor
plate, and then align the plate with the hole of the expansion bolt (one anchor
plate needs one insulation pad). Then install the M12×70 bolt in the expansion
bolt hole through the anchor plate. Install insulation washer and big flat
washers as shown in area A in Figure
2-11. Torque the M12x70 bolts to 45 Nm.
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(1) Bolt M12×70
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(2) Spring washer 12
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(3) Big flat washer 12
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(4) Insulation washer
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(5) Insulation pad of the anchor plate
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(6) Expansion tube
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(7) Expansion bolt
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(8) Nut for fastening the anchor plate
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(9) Anchor plate
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Figure
2-11 Fix the anchor plate
III. Fixing the nuts for fastening
the anchor plate
Fix the nuts for fastening the anchor
plate, as shown in area B in Figure
2-11.
IV. Fixing cabinet tops when
combining cabinets
If you need to combine two or more cabinets
together, related connections need to be performed. Combine the cabinets with
connecting plates on the top of the cabinets.
If the side panels
have been installed, remove the side panels as required before combining the
cabinets.
The connecting plates are installed on the
top of the cabinets and delivered together with the cabinets, as shown in Figure 2-12.
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(1) Connecting plate for combining
cabinets
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Figure
2-12 Position of the connecting plate
Remove the connecting plates from the
adjacent cabinets, and then reinstall the connecting plates, as shown in Figure 2-13.
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(1) Nut
M8
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(2) Flat
washer 8
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(3)
Combined screw M6x12
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(4)
Spring washer 8
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(5) Bolt
M8x30
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(6)
Connecting plate for combining cabinets
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Figure 2-13 Install the connecting plate
for combining cabinets
Caution:
M8x30 bolts used to
combine cabinets are delivered together with support accessories.
Switch the multimeter to the megohm range
and measure the resistance between the fastening bolts M12x70 and the cabinets.
If the resistance is larger than 5 megohm, you can finish installation. If not,
remove all installation anchor plate components, and then check whether the
insulation washers or pads are installed or are damaged. Rei
