Cisco NCS 2002 Manuale di istruzioni

Installing the Air Flow Regulator

This chapter explains how to install the regulators to maintain the air flow for ANSI and ETSI configurations

in NCS 2002 shelf.

The air flow within the equipment must be maintained at a nominal temperature. This task can be accomplished

using one of these mechanisms:

• Air deflector

• Air plenum

The sections are:

•Air Deflector, on page 1

•Air Plenum, on page 1

•Air Plenum Rack and Cabinet Compatibility, on page 3

•NTP-L42 Install the Air Plenum in NCS 2002 Shelf, on page 4

Air Deflector

An air deflector is a sheet-metal part that is mounted on the NCS 2002 shelf to orient the air flow in a specific

direction.

The air deflectors can be mounted in different positions to control the air flow:

• Front to Front— Only ETSI rack

• Front to Back— For ANSI and ETSI racks

• Front to Top— Only ETSI rack

In an ANSI rack, the air deflectors are mounted only on the 23-inch rack configuration.

Air Plenum

Air plenum orients the air flow in the front-to-back direction inside the equipment to be compliant with GR-63

issue 4 requirement.

NCS 2002 air plenum kit has one horizontal and two vertical air plenums. The air that flows from the front

top inlet are channelized to the right vertical plenum, inside the equipment, and then to the exhaust air channel

towards the left vertical air plenum. The air flow is deflected by 90 degrees and exited out in the rear end.

The following figure shows the air flow inside the air plenum.

Installing the Air Flow Regulator

Figure 1: Air flow within the air plenum

The following figures show the dimensions of the air plenum relative to the cabinet or rack.

Figure 2: Dimension of Cisco NCS 2002 chassis relative to the air plenum

Installing the Air Flow Regulator

Air Plenum

Figure 3: Dimension of Cisco NCS 2002 chassis relative to the air plenum

Air Plenum Rack and Cabinet Compatibility

The table shows the compatibility of air plenum with the ANSI and ETSI racks and cabinets. The chassis can

be installed with brackets in front position only.

Table 1: Air plenum compatibility with racks and cabinets

Front-to-back air flowRack / Cabinet

Supported 1

ANSI 19-inch rack

Supported 1

ANSI 19-inch cabinet

SupportedANSI 23-inch rack

SupportedANSI 23-inch cabinet

Supported 1

ETSI cabinet

1A minimum opening of 20.600 inches is required to install the vertical air plenum behind the front rails.

The ANSI 19-inch two post rack that is compatible with air plenum installation is available from Telect, with

part number 12545-301.

Note

Installing the Air Flow Regulator

Air Plenum Rack and Cabinet Compatibility

Figure 4: Minimum rear opening for ANSI 19-inch and ETSI configuration

NTP-L42 Install the Air Plenum in NCS 2002 Shelf

This procedure installs the air plenum to orient the air flow in front-to- back direction

in the NCS 2002 shelf.

Purpose

• #2 Phillips Dynamometric screwdriver

• Medium slot-head screwdriver

• Small slot-head screwdriver

• Screws

• ANSI: #12-24 x 0.50 pan-head Phillips screws

• ETSI: M6.0 x 20 pan-head Phillips screws

• Wing head screws (4)

• Adapter plates

• One air plenum kit (horizontal and vertical air plenums)

Tools/Equipment

As neededRequired/As Needed

OnsiteOnsite/Remote

NoneSecurity Level

Before performing any of the following procedures, ensure that power is removed from the DC circuit.

Statement 1074

Warning

Before working on a chassis or working near power supplies, unplug the power cord on AC units.

Statement 246

Warning

Installing the Air Flow Regulator

NTP-L42 Install the Air Plenum in NCS 2002 Shelf

This equipment is intended to be grounded. Ensure that the host is connected to earth ground during

normal use. Statement 39

Warning

For nominal voltage of -60 VDC, the input voltage range is from -40 to -72 VDC.

Note

Use only the fastening hardware provided with the NCS 2002 to prevent loosening, deterioration, and

electromechanical corrosion of the hardware and joined material.

Note

When installing or replacing the unit, the ground connection must always be made first and disconnected

last. Statement 1046

Warning

The air plenum is installed on a rack or a cabinet using thread-forming screws that remove any paint

or non-conductive coatings inside the hole threads, and establish a metal-to-metal contact. Also, clean

both surfaces outside the screw points that come in contact, so that they are free of paint and other

nonconductive coating. Apply an appropriate antioxidant compound to the surfaces.

Warning

Procedure

Depending on the rack or cabinet, complete the necessary task:

•DLP-L65 Installing Air Plenum for NCS 2002 Shelf in ANSI 19-inch Configuration, on page 5

•DLP-L69 Installing Air Plenum in NCS 2002 Shelf for ANSI 23-inch Configuration, on page 8

•DLP-L70 Installing Air Plenum for NCS 2002 Shelf in ETSI Configuration, on page 13

•DLP-L71 Installing Pre-assembled Air Plenums in ANSI 23-inch Configuration, on page 12

Stop. You have completed this procedure.

DLP-L65 Installing Air Plenum for NCS 2002 Shelf in ANSI 19-inch Configuration

This task installs the air plenum for the NCS 2002 shelf in ANSI 19-inch cabinet or

rack configuration.

Purpose

Installing the Air Flow Regulator

DLP-L65 Installing Air Plenum for NCS 2002 Shelf in ANSI 19-inch Configuration

• #2 Phillips Dynamometric screwdriver

• Medium slot-head screwdriver

• Small slot-head screwdriver

• Screws: #12-24 x 0.50 pan-head Phillips screws (4)

• Wing head screws (4)

• One air plenum kit (horizontal and vertical air plenum)

Tools/Equipment

As neededRequired/As Needed

OnsiteOnsite/Remote

NoneSecurity Level

In the 19-inch rack and cabinet, the air plenum can be mounted only if the minimum opening is 20.600 inches

to install the vertical air plenums behind the front rails.

Note

Procedure

Step 1 Place the horizontal air plenum above the shelf slot in the ANSI 19-inch cabinet or rack.

Step 2 Insert the wing head screws provided with the kit, and tighten to a torque value of 11.5 in-lb (1.3 N-m).

Figure 5: Installing the horizontal air plenum in the ANSI 19-inch configuration

Step 3 Install the vertical air plenum to the left of the horizontal air plenum:

a) Insert the vertical plenum in the free space between the horizontal plenum and cabinet.

b) Install t he wing head screws fom the internal side of the horizontal plenum as shown in the following

figure.

c) Tighten the screws to a torque value of 11.5 in-lb (1.3 N-m).

Installing the Air Flow Regulator

DLP-L65 Installing Air Plenum for NCS 2002 Shelf in ANSI 19-inch Configuration

Figure 6: Installing the left vertical air plenum

Step 4 Install the vertical air plenum to the right of the horizontal air plenum. Follow step 3a to 3c.

Figure 7: Installing the right vertical air plenum

Step 5 Install the 19-inch standard brackets on both sides of the chassis in the front position. See DLP-L35 Mounting

the 19-inch Brackets on the NCS 2002 Shelf for ANSI Rack Configuration.

Step 6 Install the NCS 2002 empty chassis below the horizontal plenum.

Installing the Air Flow Regulator

DLP-L65 Installing Air Plenum for NCS 2002 Shelf in ANSI 19-inch Configuration

Figure 8: Installing the NCS 2002 chassis below the horizontal air plenum

Step 7 Return to your originating procedure (NTP).

DLP-L69 Installing Air Plenum in NCS 2002 Shelf for ANSI 23-inch Configuration

This task installs the air plenum for the NCS 2002 shelf in the ANSI 23-inch cabinet

or rack configuration.

Purpose

• #2 Phillips Dynamometric screwdriver

• Medium slot-head screwdriver

• Small slot-head screwdriver

• Screws: #12-24 x 3/4 pan-head Phillips mounting screws (4)

• Wing head screws (4)

• Adapter plates

• One air plenum kit (horizontal and vertical air plenum)

Tools/Equipment

As neededRequired/As Needed

OnsiteOnsite/Remote

NoneSecurity Level

The air plenums for ANSI 23-inch configuration can also be pre-assembled outside the cabinet and then

installed inside the cabinet. See DLP-L71 Installing Pre-assembled Air Plenums in ANSI 23-inch Configuration,

on page 12

Note

Installing the Air Flow Regulator

DLP-L69 Installing Air Plenum in NCS 2002 Shelf for ANSI 23-inch Configuration

Procedure

Step 1 Install the ANSI 23-inch adapter plates on the horizontal air plenum.

Step 2 Align the screws to fix the adapter plates to the shelf. Insert the screws and tighten them to a torque value of

11.5 in-lb (1.3 N-m).

Figure 9: Installing the adapter plates on the horizontal air plenum

Step 3 Place the horizontal air plenum above the shelf slot in the ANSI 23-inch cabinet or rack.

Step 4 Insert the wing head screws provided with the kit, and tighten to a torque value of 11.5 in-lb (1.3 N-m).

Installing the Air Flow Regulator

DLP-L69 Installing Air Plenum in NCS 2002 Shelf for ANSI 23-inch Configuration

Figure 10: Installing the horizontal air plenum in the ANSI 23-inch configuration

Step 5 Install the vertical air plenum to the left of the horizontal air plenum:

a) Insert the vertical air plenum in the free space between the horizontal air plenum and cabinet.

b) Install the wing head screws from the internal side of the horizontal plenum as shown in the following

figure.

c) Tighten the screws to a torque value of 11.5 in-lb (1.3 N-m).

Figure 11: Installing the left vertical air plenum

Step 6 Install the vertical plenum to the right of the horizontal air plenum. Follow step 5a to 5c.

Installing the Air Flow Regulator

DLP-L69 Installing Air Plenum in NCS 2002 Shelf for ANSI 23-inch Configuration

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