Sun Microsystems 15K/9960, Руководство по планировке объекта

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9
C H A P T E R
3
Environmental Requirements
The design of your environmental control system (such as computer room air-
conditioning units) must ensure that intake air to the system meets the requirements
specified in this chapter. Air enters the individual cabinets through the access panels
and through air intakes that are located underneath the cabinets. The heated air is
exhausted out of the top of the cabinets. Overheating can occur if warm air is
directed underneath the cabinets or toward the access panels.
TABLE 3-1
provides the
environmental requirements for the Cluster Platform 15K/9960 system.
If the system components are significantly colder
[
40
°
F (4
°
C) or colder
]
than the
environment in which you will install them, leave the system components in their
shipping crates (at its final destination) for 24 hours to prevent thermal shock and
condensation.
The suggested ambient temperature range of 70 degrees F to 74 degrees F (21
degrees C to 23 degrees C) is optimal for reliability and operator comfort levels.
Most computer equipment can operate within a wide temperature range, but a level
near 72 degrees F (22 degrees C) is desirable because it is easier to maintain safe
associated relative humidity levels at this temperature. Operating in this
temperature range provides a safety buffer just in case the environmental support
TABLE 3-1
Environmental Requirements
Environmental Factor Operating Non-operating Suggested Operating Range
Temperature 50–90
°
F (16 – 32
°
C)
Temperature ramp rate not
to exceed 50
°
F (10
°
C) per
hour, humidity ramp rate
not to exceed 30% relative
humidity per hour.
14–109
°
F (-10
°
C–43
°
C)
Temperature ramp rate not
to exceed 59
°
F (15
°
C per
hour, humidity ramp rate
not to exceed 20% relative
humidity per hour.
72
°
F (22
°
C) or acceptable
range of 70-75
°
F
(21–24
°
C)
Humidity 20%–80% (noncondensing)
79
°
F (26
°
C) max wet bulb
8%–90% (noncondensing)
81
°
F (27
°
C) max wet bulb
45% or acceptable range of
35–55%
Altitude up to 10,000 ft. (3,047 m) up to 40,000 ft. (12,188 m)