refer to documentation, such as IEC documents, for the correct grounding method.
Ensure that the facility administrator or qualified electrical engineer verifies the
grounding method for the building, and performs the grounding work.
2.5 Temperature and Humidity Requirements
Airflow through Exalogic machines is from front to back. For cooling and airflow
requirements, see Environmental Requirements.
Note:
Studies have shown that temperature increases of 10 degrees Celsius (15
degrees Fahrenheit) above 20 degrees Celsius (70 degrees Fahrenheit) reduce
long-term electronics reliability by 50 percent.
Excessive internal temperatures may result in full or partial shutdown of
Exalogic machines.
Table 2-6 lists the temperature, humidity and altitude requirements for operating and
nonoperating machines.
Table 2-6 Temperature, Humidity, and Altitude Requirements
Condition Operating Requirement Nonoperating
Requirement
Optimum
Temperature 5 to 32 degrees Celsius (59
to 89.6 degrees Fahrenheit)
-40 to 70 degrees Celsius
(-40 to 158 degrees
Fahrenheit).
For optimal rack cooling,
data center temperatures
from 21 to 23 degrees Celsius
(70 to 47 degrees Fahrenheit)
Relative humidity 10 to 90 percent relative
humidity, non-condensing
Up to 93 percent relative
humidity.
For optimal data center rack
cooling, 45 to 50 percent,
non-condensing
Altitude 3048 meters (10000 feet)
maximum
12000 meters (40000 feet). Ambient temperature is
reduced by 1 degree Celsius
per 300 m above 900 m
altitude above sea level
Set conditions to the optimal temperature and humidity ranges to minimize the chance
of downtime due to component failure. Operating an Exalogic machine for extended
periods at or near the operating range limits, or installing it in an environment where
it remains at or near non-operating range limits could significantly increase hardware
component failure.
The ambient temperature range of 21 to 23 degrees Celsius (70 to 74 degrees
Fahrenheit) is optimal for server reliability and operator comfort. Most computer
equipment can operate in a wide temperature range, but near 22 degrees Celsius (72
degrees Fahrenheit) is desirable because it is easier to maintain safe humidity levels.
Operating in this temperature range provides a safety buffer in the event that the air
conditioning system goes down for a period of time.
The ambient relative humidity range of 45 to 50 percent is suitable for safe data
processing operations. Most computer equipment can operate in a wide range (20 to
80 percent), but the range of 45 to 50 percent is recommended for the following
reasons:
Temperature and Humidity Requirements
2-6 Oracle Exalogic Elastic Cloud Machine Owner's Guide
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