Lenovo System x3650 M5 Installation And Service Manual page 22

Environment:
The Lenovo System x3650 M5 compute node complies with ASHRAE class A3 specifications.
Power on:
• Temperature: 5°C–40°C (41°F–104°F) up to 950 m (3117 ft). Above 950 m (3117 ft), de-rated
maximum air temperature is 1°C (33.8°F) per 175 m (574 ft).
• Humidity, non-condensing: -12°C dew point (10.4°F) and 8%–85% relative humidity.
• Maximum dew point: 24°C (75°F)
• Maximum altitude: 3050 m (10000 ft) and 5°C–28°C (41°F–82°F)
• Maximum rate of temperature change: 5°C/hr (41°F/hr) for tape drive, 20°C/hr (68°F/hr) for HDDs
Power off:
• Temperature: 5°C–45°C (41°F–113°F)
• Relative humidity: 8%–85%
• Maximum dew point: 27°C (80.6°F)
Storage (non-operating):
• Temperature: 1°C–60°C (33.8°F–140°F)
• Altitude: 3050 m (10000 ft)
• Relative humidity: 5%–80%
• Maximum dew point: 29°C (84.2°F)
Shipment (non-operating):
• Temperature: -40°C–60°C (-40°F–140°F)
• Altitude: 10,700 m (35105 ft)
• Relative humidity: 5%–100%
• Maximum dew point: 29°C (84.2°F)
Attention:
• Design to ASHRAE Class A3, ambient of 40°C (104°F), 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 (104°F).
• Chassis is powered on.
• A3 - Derate maximum allowable temperature 1°C (33.8°F) per 175 m (574 ft) above 950 m (3117 ft).
• The minimum humidity level for class A3 is the higher (more moisture) of the -12°C (10.4°F) dew point
and the 8% relative humidity. These intersect at approximately 25°C (77°F). Below this intersection
(~25°C) the dew point (-12°C) represents the minimum moisture level, while above it relative humidity
(8%) is the minimum.
• Moisture levels lower than 0.5°C (32.9°F) dew point, but not lower -10°C (14°F) dew point 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:
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Lenovo System x3650 M5 Installation and Service Guide