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 2006 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

An air deflector is a sheet-metal part that is mounted on the NCS 2006 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 2006 air plenum kit has two horizontal and two vertical air plenums. The air that flows from the front top inlet and the front bottom 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.

Figure 1. Air flow within the air plenum

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

Figure 2. Dimension of Cisco NCS 2006 chassis relative to the air plenum
Figure 3. Dimension on Cisco NCS 2006 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

Rack / Cabinet

Front-to-back air flow

ANSI 19-inch rack

Supported 1

ANSI 19-inch cabinet

Supported 1

ANSI 23-inch rack

Supported

ANSI 23-inch cabinet

Supported

ETSI cabinet

Supported 1

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

Note
The ANSI 19-inch two post rack that is compatible with air plenum installation is available from Telect, with part number 12545-301.
Figure 4. Minimum rear opening for ANSI 19-inch and ETSI configuration

NTP-L43 Install the Air Plenum in NCS 2006 Shelf

Purpose

This procedure installs the air plenum to orient the air flow in front-to- back direction in the NCS 2006 shelf.

Tools/Equipment

  • #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 (8)
  • Adapter plates
  • One air plenum kit (horizontal and vertical air plenums)

Prerequisite Procedures

NTP-L41 Unpacking and Inspecting the Shelf

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

None


Warning

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

This equipment is intended to be grounded. Ensure that the host is connected to earth ground during normal use. Statement 39


Note
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 2006 to prevent loosening, deterioration, and electromechanical corrosion of the hardware and joined material.

Warning

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.

Procedure

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

Stop. You have completed this procedure.

DLP-L64 Installing Air Plenum for NCS 2006 Shelf in ANSI 19-inch Cabinet

Purpose

This task installs the air plenum for the NCS 2006 shelf in ANSI 19-inch cabinet.

Tools/Equipment

  • #2 Phillips Dynamometric screwdriver
  • Medium slot-head screwdriver
  • Small slot-head screwdriver
  • Screws: #12-24 x 0.50 pan-head Phillips screws (8)
  • Wing head screws (8)
  • One air plenum kit (horizontal and vertical air plenum)

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

None


Note
In the ANSI 19-inch rack or 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.

Procedure

Step 1

Place the horizontal air plenum at the bottom of the shelf slot in the ANSI 19-inch cabinet.

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) as shown in the figure below.

Figure 5. Installing the bottom horizontal air plenum in the ANSI 19-inch cabinet
Installing the bottom horizontal air plenum in the ANSI 19-inch cabinet

Step 3

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

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

  2. Install the wing head screws from the internal side of the horizontal plenum as shown in the figure below.

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

    Figure 6. Installing the left vertical air plenum
    Installing the left vertical air plenum

Step 4

Place the vertical air plenum to the right of the horizontal air plenum.

Step 5

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

Figure 7. Installing the right vertical air plenum
Installing the right vertical air plenum

Step 6

Install the horizontal air plenum above the vertical plenums. Follow step 3a to step 3c.

Figure 8. Installing the horizontal air plenum above the vertical plenums
Installing the horizontal air plenum above the vertical plenums

Step 7

Install the 19-inch standard brackets on both sides of the chassis in the front position. See DLP-L3 Mounting the Reversible Brackets on the NCS 2006 Shelf for ANSI Rack Configuration.

Step 8

Check the length between the top and bottom horizontal air plenums where the chassis will be installed. The length must be not less than 10.5 inches (267 mm). If the length is less, adjust the position of the top horizontal plenum.

Step 9

Install the NCS 2006 empty chassis between the two horizontal plenums.

Figure 9. Installing the NCS 2006 chassis between the horizontal air plenum
Installing the NCS 2006 chassis between the horizontal air plenum

Step 10

Return to your originating procedure (NTP).

DLP-L66 Installing Air Plenum in NCS 2006 Shelf for ANSI 23-inch Configuration

Purpose

This task installs the air plenum for the NCS 2006 shelf in the ANSI 23-inch cabinet or rack configuration.

Tools/Equipment

  • #2 Phillips Dynamometric screwdriver
  • Medium slot-head screwdriver
  • Small slot-head screwdriver
  • Screws: #12-24 x 3/4 pan-head Phillips mounting screws (8)
  • Wing head screws (8)
  • Adapter plates
  • One air plenum kit (horizontal and vertical air plenum)

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

None


Note
The airplenums for ANSI 23-inch configuration can be pre-assembled outside the cabinet and then installed inside the cabinet. See DLP-L68 Installing Pre-assembled Air Plenums in 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 10. Installing the adapter plates on the horizontal air plenum
Installing the adapter plates on the horizontal air plenum

Step 3

Place the horizontal air plenum below 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).

Figure 11. Installing the bottom horizontal air plenum in the ANSI 23-inch configuration
Installing the bottom horizontal air plenum in the ANSI 23-inch configuration

Step 5

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

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

  2. Install the wing head screws from the internal side of the horizontal plenum as shown in the figure below.

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

    Figure 12. Installing the left vertical air plenum
    Installing the left vertical air plenum

Step 6

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

Figure 13. Installing the right vertical air plenum
Installing the right vertical air plenum

Step 7

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

Step 8

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

Figure 14. Installing the horizontal plenum above the vertical plenums
Installing the horizontal plenum above the vertical plenums

Step 9

Install ANSI 23-inch standard brackets on both sides of the chassis in front position. See DLP-L3 Mounting the Reversible Brackets on the NCS 2006 Shelf for ANSI Rack Configuration.

Step 10

Check the length between the top and bottom horizontal air plenums where the chassis will be installed. The length must be not less than 10.5 inches (267 mm). If the length is less, adjust the position of the top horizontal plenum.

Step 11

Install the NCS 2006 empty chassis between the horizontal plenums.

Figure 15. Installing the NCS 2006 chassis between the horizontal air plenum
Installing the NCS 2006 chassis between the horizontal air plenum

Step 12

Return to your originating procedure (NTP).

DLP-L68 Installing Pre-assembled Air Plenums in ANSI 23-inch Configuration

Purpose

This task installs pre-assembled air plenums for the NCS 2006 shelf in the ANSI 23-inch configuration.

Tools/Equipment

  • #2 Phillips Dynamometric screwdriver
  • Medium slot-head screwdriver
  • Small slot-head screwdriver
  • Screws: #12-24 x 3/4 pan-head Phillips mounting screws (8)
  • Wing head screws (8)
  • Adapter plates
  • One air plenum kit (horizontal and vertical air plenum)

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

None

Procedure

Step 1

Install the ANSI 23-inch adapter plates on the horizontal air plenums.

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).

Step 3

Place a horizontal air plenum as the base.

Step 4

Install the vertical air plenum to the left of the bottom horizontal plenum.

Step 5

Install the wing head screws from the internal side of the horizontal plenum and tighten the screws to a torque value of 11.5 in-lb (1.3 N-m).

Step 6

Install the vertical air plenum to the right of the horizontal air plenum. Follow step 5.

Step 7

Install the horizontal air plenum above the vertical air plenums. Follow step 5.

Figure 16. Pre-assembling the air plenums
Pre-assembling the air plenums

Step 8

Install the pre-assembled air plenum for ANSI 23-inch configuration.

Step 9

Install the pre-assembled air plenums in the ANSI 23-inch rack or cabinet.

Step 10

Check the length between the top and bottom horizontal air plenums where the chassis will be installed. The length must be not less than 10.5 inches (267 mm). If the length is less, adjust the position of the top horizontal plenum.

Step 11

Install the empty NCS 2006 chassis between the horizontal plenums.

Step 12

Return to your originating procedure (NTP).

DLP-L67 Installing Air Plenum for NCS 2006 Shelf in ETSI Configuration

Purpose

This task installs the air plenum for the NCS 2006 shelf in the ETSI configuration.

Tools/Equipment

  • #2 Phillips Dynamometric screwdriver
  • Medium slot-head screwdriver
  • Small slot-head screwdriver
  • Screws: M6.0 x 20 pan-head Phillips screws (8)
  • Wing head screws (8)
  • Adapter plates
  • One air plenum kit (horizontal and vertical air plenum)

Required/As Needed

As needed

Onsite/Remote

Onsite

Security Level

None

Procedure

Step 1

Install the ETSI adapter plates on the horizontal air plenums.

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 17. Installing the adapter plates on the horizontal air plenum

Step 3

Place the horizontal plenum below the chassis slot in the ETSI cabinet.

Step 4

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

Figure 18. Installing the horizontal air plenum in the ETSI configuration

Step 5

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

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

  2. Install the wing head screws from the internal side of the horizontal plenum as shown in the figure below.

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

    Figure 19. Installing the left vertical air plenum

Step 6

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

Step 7

Place the horizontal plenum above the chassis slot in the ETSI cabinet.

Step 8

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

Figure 20. Installing the horizontal air plenum above the vertical plenums

Step 9

Install the standard brackets on both sides of the chassis in front position. See DLP-L5 Mounting the Brackets on the NCS 2006 Shelf for ETSI Rack Configuration.

Step 10

Check the length between the top and bottom horizontal air plenums where the chassis will be installed. The length must be not less than 10.5 inches (267 mm). If the length is less, adjust the position of the top horizontal plenum.

Step 11

Install the NCS 2006 empty chassis between the horizontal plenums.

Figure 21. Installing the NCS 2006 chassis below the horizontal air plenum

Step 12

Return to your originating procedure (NTP).

Air Flow Performance of NCS 2006

The tables below summarizes the air flow performance of NCS 2006:

Chassis

Deflector PID

Deflector

Flow Direction

Maximum Airflow at 40°C (CFM)

NCS 2006 with NCS2006-FTA=

15454-M6-DEFL21

( ETSI 21-inch deflector)

Air filter side

Exhaust side

Front to rear

136

Air filter side

Front to left side

258

15454-M6-DEFL23

( ANSI 23-inch deflector)

Air filter side

Fan tray side

Front to rear

167

Air filter side

Front to left side

268

No deflectors

Right side to left side

295