Thermal Guidelines For Sun Fire E6900/E4900 Systems; Conditions - Sun Microsystems Sun Fire E6900 Site Planning Manual

3.4 Thermal Guidelines for Sun Fire
E6900/E4900 Systems
These guidelines are intended to assist those who would install the Sun Fire
E6900/E4900 systems at the end users' site. These guidelines address cooling issues
only.
It is the ultimate responsibility of the end user to ensure that the environment in
which these systems are mounted meet the following:
All systems specifications
■
Safety requirements specifications
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3.4.1

Conditions

Any systems mounted in a rack with Sun systems must have front-to-back
■
cooling (no side to side).
The front of the cabinet should not be facing, nor be in the path of, the exhaust air
■
from any other systems or cabinets.
It is recommended that the cabinet allow 0.188 cubic meters per second (600 cubic
■
feet per minute) of exhaust air out of the cabinet by way of the exhaust fans
located at the top of the cabinet.
The cabinet must allow for airflow to enter from the front and exhaust to the rear.
■
Do not use a closed cabinet that prevents airflow into the front and out of the rear
of the enclosure.
A cabinet front filler panels must be attached so that no gaps appear between
■
panels and between the panel and the system. If the panels cannot completely fill
in the area above the system, make sure the gap appears at the top of the cabinet,
away from the system. Cabinet front panels prevent hot air that is expelled from
the rear of the cabinet from reentering the system from the front.
Multiple systems in the same cabinet must be mounted as close together as
■
possible without air gaps in between, to avoid exhaust air recirculating back into
the front air intake.
All systems must be mounted in the lowest possible locations within the rack, to
■
prevent the cabinet from tipping over.
3-8 Sun Fire E6900/E4900 Systems Site Planning Guide • May 2006