Fans
The Acme Packet 4600 chassis pulls cool ambient air into the chassis through five
front-installed intake fans and exhausts heated air through perforated air outlets
located along the rear of the chassis. To avoid overheating the system, do not block
the air intake or exhaust or otherwise obstruct airflow to the system in any way.
Each individual fan attaches to the chassis with two captive screws, and is powered
by a connector that joins the fan to the motherboard when screwed into the chassis.
The Acme Packet 4600 automatically adjusts the fan speed based on the current
operational status and environmental conditions. Fan speed regulation is an
automated process that requires no user intervention. You can monitor the status of
the fan speed from the Environment menu of the graphic display.
Each fan is a user-replaceable, hot-swappable component. If the Acme Packet 4600
experiences a fan malfunction and generates an alarm, you must remove the existing
fan and replace it with a fully functioning fan.
Air Filter
The Acme Packet 4600 foam air filter removes airborne particles before they are
drawn into the system chassis. The air filter, which is located behind the front bezel
that attaches to the front of the Acme Packet 4600, can be easily removed for
maintenance. The air filter is a field replaceable unit that should be replaced once
every three months.
Chapter 2
Cooling Components
2-15