Site Planning Considerations; Computer Room Preparation - HP BL685c - ProLiant - 4 GB RAM Site Planning Manual

data center. HP Services professionals recommend changes to optimize climatic conditions and
reclaim capacity, postponing or even eliminating the need for costly mechanical upgrades. Choose
from three service levels to meet your specific requirements.
•
HP Datacenter Site Planning Service—Obtain a comprehensive site-preparation audit to help you
successfully integrate new equipment into your facility. Service deliverables include verification of
installation and service space, examination of the capacity and availability of your power
distribution system, analysis of cooling system capacity and airflow distribution, and a review of
installation readiness prerequisites. An in-depth report identifies any deficiencies and provides floor-
plan drawings locating equipment, receptacles, airflow panels, and cable cut-outs.
For more information, see the HP website
225-121.aspx).

Site planning considerations

Customer facility managers and system administrators must discuss site planning, preparation, and system
installation before system delivery. A common understanding of environmental requirements and how the
systems will be delivered, configured, installed, and maintained helps to create a suitable data center and
aids the successful installation of the servers and related equipment.
It is important to plan the facility as a whole, not design based on calculations of individual system or
rack level requirements. Too many interdependencies in a modern data center make such simple
calculations unreliable. Designs and plans must be made for the data center as a whole, including all of
its equipment, with the realization that making one change in the data center environment can affect
many other physical, mechanical, and environmental aspects of the facility.
Take into account the requirements of third-party equipment and support equipment in the room. Dense
computing locations might have high power and cooling demands that could affect power and
environmental constraints. Be aware of rack positioning and airflow patterns. Ensure that the raised floor
space, cooling equipment, power supply equipment and generators, and other support equipment meet
the demands of all the servers and other mission-critical equipment.

Computer room preparation

Observe the following guidelines when preparing a computer room for product installation:
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Locate the computer room away from the exterior walls of the building to avoid the heat gain from
windows and exterior wall surfaces.
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When exterior windows are unavoidable, use windows that are double- or triple-glazed and shaded
to prevent direct sunlight from entering the computer room.
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Maintain the computer room at a positive pressure relative to surrounding spaces.
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Use a vapor barrier installed around the entire computer room envelope to restrain moisture
migration.
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Caulk and vapor seal all pipe, conduit, and cable computer room entry and exit points.
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In underfloor distribution installations, install at least a 610 mm (24 in) raised floor system for
optimum room air distribution.
•
Ensure a minimum clearance of 457 mm (18 in) between the top of the rack and the ceiling to allow
for return airflow.
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General site preparation guidelines 8