Table 31. Particulate contamination specifications
Particulate contamination Specifications
Air filtration Data center air filtration as defined by ISO Class 8 per ISO 14644-1
with a 95% upper confidence limit
NOTE: This condition applies to data center environments only. Air
filtration requirements do not apply to IT equipment designed to be
used outside a data center, in environments such as an office or
factory floor.
NOTE: Air entering the data center must have MERV11 or MERV13
filtration.
Conductive dust Air must be free of conductive dust, zinc whiskers, or other
conductive particles
NOTE: This condition applies to data center and non-data center
environments.
Corrosive dust
● Air must be free of corrosive dust
● Residual dust present in the air must have a deliquescent point less
than 60% relative humidity
NOTE: This condition applies to data center and non-data center
environments.
Table 32. Gaseous contamination specifications
Gaseous contamination Specifications
Copper coupon corrosion rate <300 Å/month per Class G1 as defined by ANSI/ISA71.04-2013
Silver coupon corrosion rate <200 Å/month as defined by ANSI/ISA71.04-2013
Thermal air restrictions
ASHRAE A3 environment
● Two PSUs are required in redundant mode, however single PSU failure is not supported.
● PCIe SSD is not supported.
● DIMMs greater than 32 GB are not supported.
● Both SW and DW GPGPU/FPGA are not supported.
● CPU TDP greater than 200W are not supported.
● Rear drives are not supported.
● PCIe card TDP more than 25 W is not supported.
●
OCP is supported with 85C active optic cable.
ASHRAE A4 environment
● Two PSUs are required in redundant mode, however single PSU failure is not supported.
● PCIe SSD is not supported.
● DIMMs greater than 32 GB are not supported.
● Both SW and DW GPGPU/FPGA are not supported.
● CPU TDP greater than 200W are not supported.
● Rear drives are not supported.
● PCIe card TDP more than 25 W is not supported.
● OCP is supported with 85C active cable and cards Tier<=4
● BOSS N1 is not supported.
Technical specifications
33
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