Cisco ASR 5000 Bedienungsanleitung

Chassis Installation

This chapter provides information on rack configurations and instructions for installing and removing the

chassis and its sub-components –the upper and lower fan trays and the Power Filter Units (PFUs).

Prior to installation, personnel should review and be familiar with all recommendations for Central Office

installations, as found in Telcordia GR-1275-CORE Central Office Environment Installation/Removal

Generic Requirements, Issue 3, December 2001.

Important

This chapter includes the following sections:

•Equipment Rack Configuration, page 1

•Weight Considerations, page 3

•Unpacking the ASR 5000 Chassis, page 3

•Installing the Chassis, page 6

Equipment Rack Configuration

The chassis is designed for installation in a standard 19-inch (48.26 cm) equipment rack. Additional rack

hardware, such as extension brackets, may be used to install the chassis in a standard 23-inch (58.42 cm) rack.

Each chassis is 24.50 inches (62.23 cm) high. This equates to roughly 14 Rack Mount Units (RMUs: 1 RMU

= 1.75 in (4.45 cm).

You can mount a maximum of three chassis in a standard 48 RMU (7 ft.) equipment rack or telco cabinet

provided that all system cooling and ventilation requirements are met. A fully-loaded rack with three chassis

installed has approximately 5.5 inches (13.97 cm, 3.14 RMUs) of vertical space remaining.

When planning chassis installation, take care to ensure that the equipment rack or cabinet hardware does

not hinder air flow at any of the intake or exhaust vents. Additionally, ensure that the environmental control

system (HVAC) allows the system to function within the required limits.

Caution

ASR 5000 Installation Guide

Ventilation Considerations

Airflow within the system is designed per Telcordia recommendations to ensure the proper vertical convection

cooling of the system.

As shown in the figure below, the lower fan tray pulls ambient air inward from the front and side intake vents

located at the bottom of the chassis. The air is pushed upwards through the system and absorbs heat as it

passes over system components.

Total air flow exiting the chassis is approximately:

•275CFM (7.8 cubic meters/minute) –Low fan speed

•565CFM (16 cubic meters/minute) –High fan speed

The upper fan tray pulls the heated air up through the chassis. The heated air exits through the side and rear

exhaust vents located at the top of the chassis.

Figure 1: System Airflow and Ventilation

Proper ventilation and cooling must allow the chassis to operate within the temperature and humidity levels

described in the following table.

ASR 5000 Installation Guide

Chassis Installation

Ventilation Considerations

Table 1: Operating Temperature and Humidity Recommendations

0 degrees C to +55 degrees C

32 degrees F to +131 degrees F

Operating Temperature

20 percent to 80 percent, non-condensingOperating Humidity

Mounting Options

There are two options for mounting the chassis in a standard equipment rack or telecommunications cabinet:

•Flush Mount: In this configuration, the flanges of the mounting brackets are flush with the front of the

chassis. This is the default configuration as shipped as is commonly used with 4-post racks and equipment

cabinets. Refer to Flush Mount Installation of the Chassis, on page 9.

•Mid-mount: In this configuration, the flanges of the mounting brackets are recessed from the front of

the chassis. This configuration is required when mounting the chassis in a 2-post rack. To do this, install

the mounting brackets toward the middle of the chassis on either side. Refer to Mid-Mount Installation

of the Chassis, on page 10.

Weight Considerations

The shipping weight of the chassis is approximately 160 pounds (72.57 kg). Please consider the following

recommendations before proceeding:

•If available, use an equipment lift to lift and move the chassis during the installation process.

•If no lift is available, reduce the weight according to the instructions in the Reducing the Weight of the

Chassis Prior to Installation, on page 6. These procedures reduces the weight of the chassis to

approximately 125 lbs. (56.7 kg).

•At least two people are required to perform the installation. These individuals should be physically able

to lift and control the weight of the chassis.

•When lifting any heavy object, it is important to remember to bend at the knees and lift with your legs.

Bending at the waist and lifting with your back could cause personal injury.

Unpacking the ASR 5000 Chassis

Before unpacking the chassis, use a pallet jack to move the container as close to the final installation site

as possible.

Important

The chassis ships in a wooden container that is 28.25 in. (64.135cm) wide by 36.75 in. (93.35cm) high by

33.75 in. (85.75cm) deep. The container consists of an upper and lower section. The upper section forms the

sides and top of the container. The lower section serves as the bottom of the container. The upper and lower

ASR 5000 Installation Guide

Chassis Installation

Mounting Options

sections are secured together for shipping via four locking mechanisms located near the bottom corners of

the container.

ASR 5000 Installation Guide

Chassis Installation

Unpacking the ASR 5000 Chassis

Refer to the printed instructions that come with the shipment for detailed unpacking procedures.Important

Figure 2: ASR 5000 Shipping Container

ASR 5000 Installation Guide

Chassis Installation

Unpacking the ASR 5000 Chassis

Installing the Chassis

If you are installing more than one chassis in an equipment rack, to ensure an easier installation, begin by

installing the first chassis near the bottom of the rack.

Important

When handling or moving the chassis, lift the chassis from the bottom only. Lifting it by any other part

could result in damage to the chassis.

Caution

During installation, maintenance, and/or removal, wear grounding wrist and/or heel straps to avoid ESD

damage to the components. Failure to do so could result in damage to sensitive electronic components

and potentially void your warranty.

Caution

Reducing the Weight of the Chassis Prior to Installation

To make the installation process easier, you can reduce the weight of the chassis prior to installation by

removing the upper and lower fan trays and the PFUs. Follow the instructions below to safely remove these

components prior to installation.

During installation, maintenance, and/or removal, wear grounding wrist and/or heel straps to avoid ESD

damage to the components. Failure to do so could result in damage to sensitive electronic components

and potentially void your warranty.

Caution

Step 1 Remove the upper fan tray.

ASR 5000 Installation Guide

Chassis Installation

Installing the Chassis

a) Remove the plastic bezel from the upper-front of the chassis by placing your fingers in the notches on the sides of

the bezel and pulling it toward you. Place it to the side for re-installation later.

b) Loosen the four screws that secure the fan tray in place using a Phillips #1 screwdriver.

c) Grasp the two bezel mounts on the front of the fan tray and pull. The fan tray should easily slide out of the chassis.

Place it to the side for re-installation later.

To avoid personal injury and/or damage to the fan tray, be sure to support the weight of the fan tray from its front

and back as you slide it completely out of the chassis.

Vorsicht beim Herausziehen der Luefter-Schublade: um eine Beschaedigung des Moduls und eventuelle Verletzungen

zu vermeiden, sollte diese hinten und vorne unterstuetzt werden.

Step 2 Remove the lower fan tray assembly.

ASR 5000 Installation Guide

Chassis Installation

Reducing the Weight of the Chassis Prior to Installation

a) Unsnap the plastic bezel from the lower-front of the chassis by placing your fingers in the notches on the sides of the

bezel and pulling it toward you. Place it to the side for re-installation later.

b) Use a Phillips #1 screwdriver to loosen the four captive screws that hold the fan tray cover/EMI shield in place. Pull

the cover away from the chassis. Do NOT use an electric or pneumatic torque driver to loosen these screws.

c) Pull the fan tray toward you using the handle. The fan tray should easily slide out of the chassis. Place it to the side

for re-installation later.

To avoid personal injury and/or damage to the fan tray, be sure to support the fan tray's weight from its front and

back as you slide it completely out of the chassis.

Vorsicht beim Herausziehen der Luefter-Schublade: um eine Beschaedigung des Moduls und eventuelle Verletzungen

zu vermeiden, sollte diese hinten und vorne unterstuetzt werden.

Step 3 Remove the PFUs located in the lower-rear of the chassis.

ASR 5000 Installation Guide

Chassis Installation

Reducing the Weight of the Chassis Prior to Installation

a) Locate the PFU bay labeled Power Filter Unit 1 on the lower-left rear of the chassis.

b) Use a Phillips #2 screwdriver to loosen the four screws that secure the PFU in to the chassis.

c) Grasp the handle on the PFU and gently pull the PFU toward you. The PFU should slide easily out of the chassis.

Place it to the side for re-installation later.

d) Repeat step b and step c for the PFU located in the bay labeled Power Filter Unit 2 located on the lower-right side

of the chassis.

Step 4 Proceed to either the Flush Mount Installation of the Chassis, on page 9 or Mid-Mount Installation of the Chassis, on

page 10, based on the mounting option you are using.

Flush Mount Installation of the Chassis

Follow the instructions below to perform the flush mount installation of the chassis.

Step 1 Position the chassis in the equipment rack so that the flanges of the mounting brackets at the front of the chassis are flush

with the mounting rails of the equipment rack.

Step 2 Mount the chassis to the rails of the equipment rack. Use the hardware that was supplied with the equipment rack. Begin

with the two bottom holes and work your way up until all four holes on each flange are secured.

ASR 5000 Installation Guide

Chassis Installation

Flush Mount Installation of the Chassis

Step 3 Repeat step 1 and step 2 for any additional chassis you are installing in the equipment rack.

Step 4 Proceed to the Grounding the Chassis, on page 12 section and ground the chassis.

Mid-Mount Installation of the Chassis

Follow the instructions below to perform the mid-mount installation of the system.

Step 1 On the side of the chassis, unfasten the eight Phillips #2 screws that secure the mounting bracket to the chassis.

Step 2 Place the mounting bracket over the middle set of mounting holes on the side of the chassis and secure it to the chassis

with the screws you removed in step 1.

ASR 5000 Installation Guide

Chassis Installation

Mid-Mount Installation of the Chassis

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