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The HP BladeSystem p-Class Sizing Utility provides environmental load estimates (total DC and AC
power consumption, generated heat in BTU, weight and floor space requirements) based on the
configuration. This information can be useful when planning and managing the data center
environment.
For more information about the HP BladeSystem p-Class Sizing Utility, refer to
http://www.hp.com/go/bladesystem/sizingutility
Power requirements
The installation of this equipment shall be in accordance with local and regional electrical regulations
governing the installation of information technology equipment by licensed electricians. This
equipment is designed to operate in installations covered by NFPA 70, 1999 Edition (National
Electric Code) and NFPA 75, 1992 Edition (code for Protection of Electronic Computer/Data
Processing Equipment). For electrical power ratings on options, refer to the rating label of the product
or the user documentation supplied with that option.
When installing the HP BladeSystem, observe the following guidelines:
• The power load must be balanced between available supply branch circuits.
• The overall system current load must not exceed 80 percent of the branch circuit current rating.
For DC systems, HP BladeSystem p-Class 3U rack-centralized solutions run on –48 VDC ±10%. When
power supplies are included in the HP BladeSystem p-Class solution, they require 230 VAC
(International) or 208 VAC (US).
Cooling and airflow
The server blades use front-to-back ambient air for cooling. Therefore, the front and rear rack doors
must be adequately ventilated to allow ambient room air to enter the cabinet, and the rear door must
be adequately ventilated to allow the warm air to escape from the cabinet.
When server blades or rack components do not fill the entire vertical space in the rack, the gaps
between the components cause changes in airflow through the rack and across the server blades.
Cover all gaps in the rack with blanking panels and fill all open bays in the server blade enclosure
with blanks to maintain proper airflow. HP 10000 and Compaq 9000 Series Racks provide proper
server blade cooling from flow-through perforations in the front and rear doors that provide 65%
open area for ventilation.
Total weight
Data on the dimensions and weights of HP BladeSystem p-Class components can be found in the
HP BladeSystem p-Class System Maintenance and Service Guide. The same data can be determined
by using the online HP BladeSystem p-Class Sizing Utility. In general, the raised floor must be capable
2
2
of withstanding a uniform load of 1,220 kg/m
(250 lb/ft
) or a load of 454 kg (1,000 lb) on any
2
2
6.5 cm
(1.0 in
) surface, with a maximum deflection of 2.5 mm (0.1 in). For more information about
the HP BladeSystem p-Class Sizing Utility, refer to
http://www.hp.com/go/bladesystem/sizingutility
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