Ventilation Guidelines
Ventilation Guidelines
Rackmount servers and equipment, including the Sun Server X4-8, typically draw cool air
in from the front of the rack and let warm air out the back of the rack. There is no airflow
requirement for the left and right sides due to front-to-back cooling.
Air conditioning facilities usually do not precisely monitor or control temperature and humidity
throughout an entire computer room. Generally, monitoring is done at individual points
corresponding to multiple exhaust vents in the main unit, and other units in the room.
Special consideration should be paid to humidity when using underfloor ventilation. When
underfloor ventilation is used, monitoring is done at each point close to an exhaust vent.
Distribution of the temperature and humidity across the entire room is uneven.
The Sun Server X4-8 has been designed to function while installed in a natural convection
airflow. The following requirements must be followed to meet the environmental specification:
■
Ensure that there is adequate airflow through the system.
■
Ensure that air intake is at the front of the system, and the air outlet is at the back of the
system.
■
Allow a minimum clearance of 1,232 mm (48.5 inches) at the front of the system, and 914
mm (36 inches) at the back of the system for ventilation.
■
Ensure unobstructed airflow through the chassis. The server uses internal fans that can
achieve a total airflow of 100 CFM in normal operating conditions.
■
Ensure that air temperature rise through the server is no greater than 68°F (20°C).
■
Ensure that inlet air enters at the front of the server and exits from the back.
■
Ensure that ventilation openings such as cabinet doors, for both the inlet and exhaust of
the server are not obstructed. For example, Oracle's Sun Rack II has been optimized for
cooling. Both the front and back doors have 80 percent perforations that provide a high level
of airflow through the rack.
■
Ensure that front and back clearance of the server allow a minimum of 1 inch (25.4 mm) at
the front of the server and 3.15 inch (80 mm) at the back of the server when mounted.
These clearance values are based on the inlet and exhaust impedance (available open area)
stated above and assume a uniform distribution of the open area across the inlet and exhaust
areas. These values also improve cooling performance.
Note -
The combination of inlet and exhaust restrictions such as cabinet doors and the
spacing of the server from the doors can affect the cooling performance of the server.
You must evaluate these restrictions. server placement is particularly important for high-
temperature environments.
Preparing to Install the Server
33
Summary of Contents for SUN X4-8
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