HP 9000 Superdome SX2000 Generic Site Preparation Guide - Edition 6 - Page 16

NOTE: In domestic installations, install approved receptacles before the HP equipment arrives. See the appropriate installation guide for installation procedures. Acclimatization IMPORTANT: After removal of shipping material, HP recommends allowing the thermal mass of the product to equalize to the temperature and humidity of the installation facility. A minimum of 10°C (50°F) to one hour of temperature difference between the shipping/receiving facility and installation facility is required. The physical size of the product determines the time period required to acclimate to the surrounding controlled computer room. For example: A 2m cabinet populated with racked equipment or a large, preconfigured server system may require an overnight period. The temperature of a small desktop printer would equalize sooner at the 10°C (50°F) per one hour rate. Wiring Connections Expansion and contraction rates vary among different metals. Therefore, the integrity of an electrical connection depends on the restraining force applied. Connections that are too tight compress or deform the hardware and cause it to weaken. This usually leads to high impedance, preventing circuit breakers from tripping when needed. High impedance can also contribute to a buildup of high-frequency noise. CAUTION: Connections that are too loose or tight can have a high impedance which cause serious problems, such as erratic equipment operation. A high-impedance connection overheats and sometimes causes fire or high temperatures that can destroy hard-to-replace components, such as distribution panels or system bus bars. Wiring connections must be properly torqued. Many equipment manufacturers specify the proper connection torque values for their hardware. See the safety requirements provided by your wire manufacturer. Ground connections must be made only on a conductive, nonpainted surface. When equipment vibration is present, lock washers must be used on all connections to prevent connection hardware from working loose. Data Communications Cables Power transformers create high-energy fields in the form of electromagnetic interference (EMI). Heavy foot traffic can create electrostatic discharge (ESD) which can damage electronic components. Route data communications cables away from these areas and use shielded data communications cables that meet approved industry standards to reduce the effects of external energy fields. Environmental Elements Synopsis Air Quality Proper computer room preparation improves air quality. It provides a return on investment by making a system more stable and by decreasing unexpected downtime. HP recommends putting appropriate effort into maximizing electrical and air-conditioning efficiency to ensure higher reliability to meet business needs. 16 General Site Preparation Guidelines