Chapter 2 Preparing for Installation
Site Requirement Guidelines
When planning your rack installation, consider the following guidelines:
•Install the router in an open rack whenever possible. If installation in an enclosed rack is unavoidable, ensure that the rack has adequate ventilation.
An enclosed rack should have louvered sides and a fan to provide cooling air, because heat generated by equipment near the bottom of the rack can be drawn upward into the intake ports of the equipment above.
Caution To prevent chassis overheating, never install the router in an enclosed rack or room that is not properly ventilated or air conditioned.
•Ensure that the rack is not congested, because each unit generates heat. Maintain a minimum clearance of 3 inches (7.62 cm) on the back and front of the chassis for the cooling air inlet and exhaust ports, respectively.
•Baffles can isolate exhaust air from intake air, which also helps to draw cooling air through the chassis. The best placement of the baffles depends on the airflow patterns in the rack, which can be found by experimenting with different configurations.
•When equipment installed in a rack (particularly in an enclosed rack) fails, try operating the equipment by itself, if possible. Power off other equipment in the rack to allow the unit under test a maximum of cooling air and clean power.
•Allow sufficient clearance around the rack for maintenance. If the rack is mobile, you can push it back near a wall or cabinet for normal operation and pull it out for maintenance (installing or removing a port adapter or connecting cables). Otherwise, allow 19 inches (48.3 cm) of clearance to remove the port adapter.
•Install the chassis and external devices to which it will connect in a contiguous stack.
•Always install heavier equipment in the lower half of a rack to maintain a low center of gravity and prevent the rack from falling over.
•If you use
•Provide an adequate chassis ground (earth) connection for your router chassis.
Note We strongly recommend that you provide a chassis ground connection. (See “Attaching the System Ground Connection” section on page
In addition to the preceding guidelines, review the precautions for avoiding overtemperature conditions in the following section, “Temperature and Humidity Requirements.” To properly install a
Cisco uBR7100 series chassis in a rack, see the instructions given in
Temperature and Humidity Requirements
Table
Cisco uBR7100 Series and Cisco uBR7100E Series Universal Broadband Router Hardware Installation Guide
|
| |
|