HP rp7440 User Service Guide, Fourth Edition - HP Integrity rx7640 and HP 9000 - Page 40
Acoustic Noise Specification, Airflow
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Table 2-9 Typical Server Configurations for the HP Integrity rx7640 Server Cell Boards Qty 2 2 2 1 Memory Per PCI Cards DVDs Cell Board (assumes 10 watts each) GBytes Qty Qty 32 16 2 16 8 0 8 8 0 8 8 0 Hard Disk Core I/O Bulk Power Typical Drives Supplies Power Qty Qty Qty 4 2 2 2 2 2 2 2 2 1 1 2 Watts 2128 1958 1921 1262 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 Typical Cooling BTU/hr 7265 6685 6558 4308 NOTE: When determining power requirements you must consider any peripheral equipment that will be installed during initial installation or as a later update. Refer to 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 2-1 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. 40 Server Site Preparation