Site Preparation Guide, Third Edition - Server Expansion Unit

Chapter 1
System Specifications
Environmental Specifications
8
Acoustic Noise Specification
The acoustic noise specification for the Server Expansion Unit is 57.1 db (sound pressure level at bystander
position) when connected to the HP 9000 rp8400 server as the host system. It is appropriate for dedicated
computer room environments, not office environments. The LwA is 7.4 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.
Air Flow
The Server Expansion Unit requires that the cabinet air intake temperature be between 68° F and 77° F
(20° C and 25° C) at 150 CFM.
Figure 1-1 illustrates the location of the inlet and outlet airducts on a single cabinet. Air is drawn into the
front of the Server Expansion Unit and forced out the rear.
Figure 1-1 Airflow Diagram