HP Server rp8400 Site Preparation Guide, Second Edition - HP rp8400 Server Ser - Page 25

System Specifications Environmental Requirements Environmental Requirements This section provides the environmental, power dissipation, noise emission, and air flow specifications for the rp8400 server. Temperature and Humidity Specifications Ambient intake air temperature is often different from ambient room temperature; you should measure the operating temperature and humidity directly in front of the cabinet cooling air intakes rather than check only ambient room conditions. Table 1-7 lists the computer room temperature and humidity specifications for rp8400 servers. Table 1-7 Computer Environment Parameter Temperatureab Operating Range 5ο C to 35ο C (up to 5000 feet) Recommended Operating Range 20ο C to 25ο C (up to 5000 feet) Maximum Rate of Change Non-Operating Range 10ο C/hr with tape -40ο C to +70ο C 20ο C/hr without tape Relative Humidity 15% to 80% at 35ο C 40% to 60% at 35ο C 30% per hour noncondensing noncondensing noncondensing a. Derate 1ο C/1000 feet above 5000 feet and up to 10,000 feet. b. System also requires 960 CFM airflow. NOTE Operating ranges refer to the ambient air temperature and humidity measured at the cabinet cooling air intake vents. Power Dissipation This section describes the power dissipated by each component of the rp8400 server. Cabinet Power Dissipation Table 1-8 lists the theoretical maximum power dissipations of the rp8400 server system. Table 1-9 lists typical power dissipation. To determine the power dissipations of your specific system, refer to Table A-1 on page 46 and Table A-2 on page 46. The entry for each component lists the individual power dissipation for the components that can be installed in that cabinet. The air conditioning data is derived from the following equations. • Watts x (0.860) = kcal/hour • Watts x (3.414) = Btu/hour • Btu/hour divided by 12,000 = tons of refrigeration required Chapter 1 9