Air conditioning facilities usually do not precisely monitor or control temperature and humidity throughout an entire computer room. Generally, monitoring is done at individual points corresponding to multiple exhaust vents in the main unit, and other units in the room. Special consideration should be paid to humidity when using underfloor ventilation. When underfloor ventilation is used, monitoring is done at each point close to an exhaust vent. Distribution of the temperature and humidity across the entire room is uneven.
The Sun Server X4-2L has been designed to function while installed in a natural convection airflow. The following requirements must be followed to meet the environmental specification:
Ensure that there is adequate airflow through the system.
Ensure that the air intake is at the front of the system, and the air outlet is at the rear of the system.
Allow a minimum clearance of 1,232 mm (48.5 inches) at the front of the system, and 914 mm (36 inches) at the rear of the system for ventilation.
Ensure that air temperature rise through the server is no greater than 68°F (20°C).
Ensure that inlet air enters at the front of the server and exits from the back.
Ensure that ventilation openings such as cabinet doors, for both the inlet and exhaust of the server, are not obstructed. The Sun Rack II has been optimized for cooling. Both the front and rear doors have 80 percent perforations that provide a high level of airflow through the rack.
Ensure that front and rear clearance of the server allow a minimum of 1 inch (2.5 cm) at the front of the server and 3.15 inch (80 mm) at the rear of the server when mounted. These clearance values are based on the inlet and exhaust impedance (available open area) stated above and assume a uniform distribution of the open area across the inlet and exhaust areas. These values also improve cooling performance.
Note - The combination of inlet and exhaust restrictions such as cabinet doors and the spacing of the server from the doors can affect the cooling performance of the server. You must evaluate these restrictions. Server placement is particularly important for high-temperature environments.
Take care to prevent recirculation of exhaust air within a rack or cabinet.
Manage cables to minimize interference with the server exhaust vent.