HP Integrity rx2620 Site Preparation Guide. First Edition - HP Integrity rx262 - Page 24

General Site Preparation Guidelines Environmental Elements Computer Room Preparation The following guidelines are recommended when preparing a computer room for an hp Integrity rx2620 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 rx2620 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 rx2620 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 • Reheating • Air distribution • System controls adequate to maintain the computer room within specified operating ranges Lighting and personnel must also be included. For example, a person dissipates about 450 BTUs per hour while performing a typical computer room task. Air Conditioning System Guidelines The following guidelines are recommended when designing an air conditioning system and selecting the necessary equipment: • The air conditioning system that serves the computer room should be capable of operating 24 hours a day, 365 days a year. It should also be independent of other systems in the building. • Redundant air conditioning equipment or capacity to ensure availability of the hp Integrity rx2620 Server. 24 Chapter 2