Cisco ASR 5000 Installation Manual

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).

Important

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.

This chapter includes the following sections:

Equipment Rack Configuration, page 1

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Weight Considerations, page 3

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Unpacking the ASR 5000 Chassis, page 3

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Installing the Chassis, page 6

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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.

Caution

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.

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Ventilation Considerations

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

Chassis Installation

Proper ventilation and cooling must allow the chassis to operate within the temperature and humidity levels
described in the following table.

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Chassis Installation

Mounting Options

Table 1: Operating Temperature and Humidity Recommendations

Operating Temperature

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

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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

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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

0 degrees C to +55 degrees C

32 degrees F to +131 degrees F

20 percent to 80 percent, non-condensingOperating Humidity

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.

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

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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

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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.

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

Unpacking the ASR 5000 Chassis

Important

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

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

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Unpacking the ASR 5000 Chassis

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

Chassis Installation

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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

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Installing the Chassis

Installing the Chassis

Chassis Installation

Important

Caution

Caution

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.

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.

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.

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.

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.

Step 1

6

Remove the upper fan tray.

ASR 5000 Installation Guide