Lenovo 7D7Q, Maintenance Manual

Page: 13 / 184

Table 1. Server Specifications (continued)
Specification Description
Electrical input Sine-wave input (50–60 Hz) required
• 300-Watt power supply:
100-127 V ac /200-240 V ac, 4/2A
• 450-Watt power supply:
100-127 V ac /200-240 V ac, 5.8/2.9A
Environment The ThinkSystem SR250 V2 complies with ASHRAE class A2 specifications. System
performance may be impacted when operating temperature is outside ASHRAE A2
specification or fan failed condition.
The ThinkSystem SR250 V2 is supported in the following environment:
• Air temperature:
– Server on:
– ASHRAE Class A2: 10°C to 35°C (50°F to 95°F); decrease the maximum
ambient temperature by 1°C for every 300 m (984 ft) increase in altitude
above 900 m (2,953 ft).
– ASHRAE Class A3: 5°C to 40°C (41°F to 104°F); decrease the maximum
ambient temperature by 1°C for every 175 m (574 ft) increase in altitude
above 900 m (2,953 ft).
– ASHRAE Class A4: 5°C to 45°C (41°F to 113°F); decrease the maximum
ambient temperature by 1°C for every 125 m (410 ft) increase in altitude
above 900 m (2,953 ft).
– Sever off: 5°C to 45°C (41°F to 113°F)
– Shipping/storage: -40 to 60°C (-40 to 140°F)
• Maximum altitude: 3,050 m (10,000 ft)
• Relative Humidity (non-condensing):
– Operating:
– ASHRAE Class A2: 8% to 80%, maximum dew point : 21°C (70°F)
– ASHRAE Class A3: 8% to 85%, maximum dew point : 24°C (75°F)
– ASHRAE Class A4: 8% to 90%, maximum dew point : 24°C (75°F)
– Shipment/storage: 8% to 90%
• 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
solution. For information about the limits for particulates and gases, see
“Particulate contamination” on page 5 .
Particulate contamination
Attention:
Airborne particulates (including metal flakes or particles) and reactive gases acting alone or in
combination with other environmental factors such as humidity or temperature might pose a risk to the
device that is described in this document.
Risks that are posed by the presence of excessive particulate levels or concentrations of harmful gases
include damage that might cause the device to malfunction or cease functioning altogether. This
specification sets forth limits for particulates and gases that are intended to avoid such damage. The limits
must not be viewed or used as definitive limits, because numerous other factors, such as temperature or
Chapter 1
.
Introduction
5