Fujitsu SPARC M12-1 Installation Manual page 29

The environmental conditions described in
SPARC M12-1 and PCI expansion unit. The optimal conditions represent the
recommended environment in operation. The component failure rate may increase
substantially when the system operates for prolonged periods in an environment that
is at or close to the operation-time (in operation) limit values, or when the system is
installed in an environment that is at or close to the non-operation-time (not in
operation) limit values. To minimize the occurrence of system downtime due to a
component failure, set the temperature and humidity within the optimal condition
range.
The following conditions must be met to prevent overheating:
Neither warm air nor hot air blows directly on the front of the rack
■
Neither warm air nor hot air blows directly on the front panel of any chassis
■
Table 2-4 Environmental Conditions
Item In Operation
Ambient 5°C to 35°C
temperature (41°F to 95°F)
(*3)
Relative - When installed in server room
humidity 20% RH to 80% RH
(*1) - When installed in office
20% RH to 80% RH
Maximum - When installed in server room
wet-bulb 26°C (78.8°F)
temperature - When installed in office
29°C (84.2°F)
Altitude limit 0 m to 3,000 m
(*2) (0 ft. to 10,000 ft.)
Table 2-4 reflect test results from the
Not in Operation
- When unpacked
0°C to 50°C
(32°F to 122°F)
- When still packed
-25°C to 60°C
(-4°F to 140°F)
- When installed in server
room
8% RH to 80% RH
- When installed in office
(*4)
8% RH to 80% RH
- When installed in server
room
27°C (80.6°F)
- When installed in office
(*4)
29°C (84.2°F)
0 m to 12,000 m
(0 ft. to 40,000 ft.)
Chapter 2 Planning and Preparing for System Installation
Optimal
Condition
21°C to
23°C
(70°F to
74°F)
45% RH or
higher
but less than
50% RH
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