HP Integrity rx7640 and HP 9000 rp7440 Servers User Service Guide

The air conditioning data is derived using the following equations.
• Watts x (0.860) = kcal/hour
• Watts x (3.414) = Btu/hour
• Btu/hour divided by 12,000 = tons of refrigeration required
NOTE: When determining power requirements you must consider any peripheral equipment that
will be installed during initial installation or as a later update. See the applicable documentation
for such devices to determine the power and air-conditioning that is required to support these
devices.
Acoustic Noise Specification
The acoustic noise specification for the server is 57.3 db (sound pressure level at bystander position)
It is appropriate for dedicated computer room environments but not office environments. The LwA
is 7.5 Bels. Care should be taken to understand the acoustic noise specifications relative to operator
positions within the computer room or when adding servers to computer rooms with existing noise
sources.
Airflow
The recommended server cabinet air intake temperature is between 20° and 25° C (68° and 77°
F) at 960 CFM.
Figure 10 (page 30) illustrates the location of the inlet and outlet airducts on a single cabinet. Air
is drawn into the front of the server and forced out the rear.
Figure 10 Airflow Diagram
30 Server Site Preparation