IBM System x3650 M5, Installation And Service Manual, Page: 28 / 1010

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Relative humidity: 5% - 80%
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Maximum dew point: 29°C (84.2°F)
Shipment (non-operating):
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Temperature: -40°C to 60°C (-40°F - 140°F)
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Altitude: 10,700 m (35,105 ft)
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Relative humidity: 5% - 100%
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Maximum dew point: 29°C (84.2°F)
Attention:
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Design to ASHRAE Class A3, ambient of 40°C, with relaxed support:
– Support cloud like workload with no performance degradation
acceptable (Turbo-Off)
– Under no circumstance, can any combination of worst case workload
and configuration result in system shutdown or design exposure at
40°C
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Chassis is powered on.
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A3 - Derate maximum allowable temperature 1°C/175 m above 950 m.
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The minimum humidity level for class A3 is the higher (more moisture)
of the -12°C dew point and the 8% relative humidity. These intersect at
approximately 25°C. Below this intersection (~25°C) the dew point
(-12°C) represents the minimum moisture level, while above it relative
humidity (8%) is the minimum.
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Moisture levels lower than 0.5°C DP, but not lower -10 °C DP or 8%
relative humidity, can be accepted if appropriate control measures are
implemented to limit the generation of static electricity on personnel and
equipment in the data center. All personnel and mobile furnishings and
equipment must be connected to ground via an appropriate static control
system. The following items are considered the minimum requirements:
– Conductive materials (conductive flooring, conductive footwear on all
personnel that go into the datacenter, all mobile furnishings and
equipment will be made of conductive or static dissipative materials).
– During maintenance on any hardware, a properly functioning wrist
strap must be used by any personnel who contacts IT equipment.
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5°C/hr for data centers employing tape drives and 20°C/hr for data
centers employing disk drives.
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Chassis is removed from original shipping container and is installed but
not in use, for example, during repair, maintenance, or upgrade.
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The equipment acclimation period is 1 hour per 20°C of temperature
change from the shipping environment to the operating environment.
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Condensation is acceptable, but not rain
Particulate contamination: airborne particulates and reactive gases acting alone or
in combination with other environmental factors such as humidity or temperature
might pose a risk to the server. For information about the limits for particulates
and gases, see “Particulate contamination” on page 979.
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System x3650 M5 Type 5462: Installation and Service Guide