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replacement of devices or parts on implementation of appropriate remedial measures to mitigate
such environmental contamination. Implementation of such remedial measures is a customer
responsibility.
Contaminant
Particulate
Gaseous
1
ASHRAE 52.2-2008 - Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency
by Particle Size. Atlanta: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
2
The deliquescent relative humidity of particulate contamination is the relative humidity at which the dust
absorbs enough water to become wet and promote ionic conduction.
3
ANSI/ISA-71.04-1985. Environmental conditions for process measurement and control systems: Airborne
contaminants. Instrument Society of America, Research Triangle Park, North Carolina, U.S.A.
Documentation Format
The publications for this product are in Adobe Portable Document Format (PDF) and should be
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and want to request a web-based format or accessible PDF document for a publication, direct your
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Information Development
IBM Corporation
205/A015
3039 E. Cornwallis Road
P.O. Box 12195
Research Triangle Park, North Carolina 27709-2195
U.S.A.
50
BNT RackSwitch G8124 Installation Guide
Limits
The room air must be continuously filtered with 40% atmospheric
dust spot efficiency (MERV 9) according to ASHRAE Standard
1
52.2
.
Air that enters a data center must be filtered to 99.97% efficiency
or greater, using high-efficiency particulate air (HEPA) filters that
meet MIL-STD-282.
The deliquescent relative humidity of the particulate contamina-
tion must be more than 60%
The room must be free of conductive contamination such as zinc
whiskers.
Copper: Class G1 as per ANSI/ISA 71.04-1985
Silver: Corrosion rate of less than 300 Å in 30 days
2
.
3
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