Ashrae Class Compliance Information - Lenovo ThinkSystem SR665 Maintenance Manual

ASHRAE class compliance information

Your server complies with ASHRAE class A2, A3 and A4 specifications. System performance may be
impacted when operating temperature is outside ASHRAE A2, A3 or A4 specifications. The restrictions to
ASHRAE A2 (10-35°C) support are as follows:
Server
Environment requirements
status
Ambient temperature:
• ASHRAE class A2: 10–35°C (50–95°F); when the altitude exceeds 900 m (2953 ft), the maximum
ambient temperature value decreases by 1°C (1.8°F) with every 300 m (984 ft) of altitude increase.
• ASHRAE class A3: 5–40°C (41–104°F); when the altitude exceeds 900 m (2953 ft), the maximum
ambient temperature value decreases by 1°C (1.8°F) with every 175 m (574 ft) of altitude increase.
• ASHRAE class A4: 5–45°C (41–113°F); when the altitude exceeds 900 m (2953 ft), the maximum
ambient temperature value decreases by 1°C (1.8°F) with every 125 m (410 ft) of altitude increase.
Operating
Maximum altitude: 3050 m (10 000 ft)
Relative humidity (non-condensing):
• ASHRAE class A2: 8%–80%; maximum dew point: 21°C (70°F)
• ASHRAE class A3: 8%–85%; maximum dew point: 24°C (75°F)
• ASHRAE class A4: 8%–90%; maximum dew point: 24°C (75°F)
Ambient temperature:
Server off
5–45°C (41–113°F)
Ambient temperature:
-40–60°C (-40–140°F)
Shipping or
storage
Maximum altitude: 3050 m (10 000 ft)
Relative humidity (non-condensing): 8%–90%
Attention: 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 445.
Notes: The restrictions to ASHRAE A2 (10-35°C) support are as follows:
• Mellanox ConnectX-6 adapters with Active Optical Cables (AOCs), ambient temperature cannot exceed
30°C
• With 8x 3.5-inch or 8x 2.5-inch or 16x 2.5-inch front drive bays + double-wide GPUs, ambient temperature
cannot exceed 30°C
• With 8x 3.5-inch or 16x 2.5-inch front drive bays + NVIDIA T4 GPU, ambient temperature cannot exceed
30°C
To comply with ASHRAE A3 (5-40°C) and A4 (5-45°C) specifications, the server models must meet the
following hardware configuration requirements:
• No Mellanox ConnectX-6 adapters
• No Broadcom 57454 10GBASE-T 4-port OCP Ethernet Adapter, 4XC7A08240
• No GPUs
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