HP Integrity rx4640 Site Preparation Guide, Second Edition - HP Integrity rx46 - Page 28

Environmental Elements, Computer Room Preparation, Cooling Requirements

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General Site Preparation Guidelines Environmental Elements Environmental Elements The following environmental elements can affect an hp Integrity rx4640 server 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 an hp Integrity rx4640 server: • 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 at least a 12-inch raised floor system for minimum favorable room air distribution system (underfloor distribution). • Ensure a minimum clearance of 12 inches between the top of the hp Integrity rx4640 server cabinet and the ceiling to allow for return air flow and ensure that all ceiling tiles are in place. • Allow 18 inches (or local code minimum clearance) from the top of the hp Integrity rx4640 server cabinet to the fire sprinkler heads. Cooling Requirements Air conditioning equipment requirements and recommendations are described in the following sections. 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 28 Chapter 2

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General Site Preparation Guidelines
Environmental Elements
Chapter 2
28
Environmental Elements
The following environmental elements can affect an hp Integrity rx4640 server 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 an hp Integrity rx4640
server:
•
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 at least a 12-inch raised floor system for minimum favorable room air distribution system (underfloor
distribution).
•
Ensure a minimum clearance of 12 inches between the top of the hp Integrity rx4640 server cabinet and
the ceiling to allow for return air flow and ensure that all ceiling tiles are in place.
•
Allow 18 inches (or local code minimum clearance) from the top of the hp Integrity rx4640 server cabinet
to the fire sprinkler heads.
Cooling Requirements
Air conditioning equipment requirements and recommendations are described in the following sections.
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