Cisco 6503 - Catalyst Firewall Security Sys Installation Manual page 97

Chapter 2 Preparing for Installation
Temperature
Temperature extremes can cause a system to operate at reduced efficiency and cause a variety of
problems, including premature aging and failure of chips, and failure of mechanical devices. Extreme
temperature fluctuations can cause chips to become loose in their sockets. Observe the following
guidelines:
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Failure to observe these guidelines can damage internal components.
The Catalyst 6500 series switches are equipped with internal air temperature sensors that are triggered
Note
at 104°F (40°C) generating a minor alarm and at 131°F (55°C) generating a major alarm.
Air Flow
The Catalyst 6500 series switch is designed to be installed in an environment where there is a sufficient
volume of air available to cool the supervisor engines, modules, and power supplies. Any constraints
placed on the free flow of air through the chassis or an elevated ambient air temperature can cause the
switch to overheat and shut down.
To maintain proper air circulation through the Catalyst 6500 series switch chassis, we recommend that
you maintain a minimum 6-inch (15 cm) separation between a wall and the chassis air intake or a wall
and the chassis hot air exhaust. In situations where the switch chassis are installed in adjacent racks, you
should allow a minimum of 12-inches (30.5 cm) between the air intake of one chassis and the hot air
exhaust of another chassis. Failure to maintain adequate spacing between chassis can cause the switch
chassis that is drawing in the hot exhaust air to overheat and fail. On Catalyst 6500 series chassis in
which the airflow is from front to back, the chassis may be placed side-to-side.
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Ensure that the system is operating in an environment no colder than 50°F (10°C) or hotter than 95°F
(35°C).
Ensure that the chassis has adequate ventilation.
Do not place the chassis within a closed-in wall unit or on top of cloth, which can act as insulation.
Do not place it where it will receive direct sunlight, particularly in the afternoon.
Do not place it next to a heat source of any kind, including heating vents.
Adequate ventilation is particularly important at high altitudes. Make sure that all slots and openings
on the system remain unobstructed, especially the fan vent on the chassis.
Clean the installation site at regular intervals to avoid buildup of dust and debris, which can cause a
system to overheat.
If the system has been exposed to abnormally cold temperatures, allow a 2-hour warm-up period to
bring it up to normal operating temperature before turning it on.
Catalyst 6500 Series Switches Installation Guide
Site Requirements
2-3