Sun Oracle Sun Blade 6000, Руководство по планировке объекта

Страница: 15 / 32

Preparing the Site for System Installation 9
The amount of heat output per Sun Blade 6000 system varies, depending on the
system configuration. The systems are equipped with fans that route cool air
throughout the chassis from front to rear. The fans are speed controlled based on
system temperature sensors. Typical airflow (for room temperatures below 23
o
C) is
about 600 CFM . Maximum possible airflow is about 1012 CFM.
As long as the necessary air conditioning is provided in the data center to dissipate
the heat load, and sufficient space and properly vented door openings are provided
at the front and back of rackmounted systems (see
“Clearance for Service and Aisle
Requirements” on page 10 ), the system fans will enable the system to work within
the temperature specifications for systems in operation (see “Environmental
Specifications” on page 19 ). Thermal characteristics of the Sun Blade 6000 chassis
system are provided in “Thermal Design Specifications” on page 20 .
Temperature and Humidity
Requirements
The operating and nonoperating temperature specifications listed in “Environmental
Specifications” on page 19 reflect the system’s hardware limits, in order to meet all
functional requirements. Note that the operating temperatures apply to the air
entering the system and not necessarily the temperature of the air in the aisles.
Avoid temperature and humidity extremes. The optimum operating ambient
temperature and humidity ranges are the recommended operating environment.
Operating the system within the ambient temperature range is optimal for system
reliability. At 23
o
C (73.4o F) it is easy to maintain safe relative humidity ranges and
to provide a buffer if the environmental support system fails.
Ambient relative humidity levels between 45 percent and 50 percent are the most
suitable for system operations to:
■
Prevent corrosion.
■
Provide an operating time buffer in the event of an environmental control system
failure.
■
Help avoid failures due to intermittent interference from static discharges that can
occur when relative humidity is too low.
ESD is easily generated and less easily
dissipated in areas where the relative humidity is below 35 percent, and becomes
critical when levels drop below 30 percent.
Conditions should not be allowed to fluctuate by more than 5.5
o
C (10
o
F) or 10
percent relative humidity during a 60-minute period.