Superdome Servers - I/O Expansion Cabinet Guide, Fifth Edition

Appendix B
Site Requirements
Environmental Requirements
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Environmental Requirements
The following environmental elements can affect an IOX installation:
• Computer room preparation
• Cooling requirements
• Humidity level
• Air conditioning ducts
• Dust and pollution control
• Electrostatic discharge (ESD) prevention
• Acoustics (noise reduction)
Computer Room Preparation
The following guidelines are recommended when preparing a computer room for a IOX system:
• Locate the computer room away from the exterior walls of the building to avoid the heat gain from
windows and exterior wall surfaces.
• When exterior windows are unavoidable, use windows that are double or triple glazed and shaded to
prevent direct sunlight from entering the computer room.
• Maintain the computer room at a positive pressure relative to surrounding spaces.
• Use a vapor barrier installed around the entire computer room envelope to restrain moisture migration.
• Caulk and vapor seal all pipes and cables that penetrate the envelope.
• Use a 10-inch to 12-inch raised floor system for the most favorable room air distribution system
(underfloor distribution).
Cooling Requirements
Air conditioning equipment requirements and recommendations are described in the following sections.
NOTE If a power source such as a UPS is located in the computer room, include its cooling
requirements with the main system complex total. If placed in a different room, its cooling
requirements are separate and must be added to the appropriate room totals.
Basic Air Conditioning Equipment Requirements
The cooling capacity of the installed air conditioning equipment for the computer room should be sufficient to
offset the computer equipment dissipation loads, as well as any space envelope heat gain. This equipment
should include:
• Air filtration
• Cooling or dehumidification
• Humidification