Bull Novascale Blade BL465, Инструкция по установке и эксплуатации, Страница: 122 / 128

108
novascale Blade BL465 - Installation and User's Guide
Particulate contamination
Use the particulates and gases specifications to create a safe operating environment for
your blade server.
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 server 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 server 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 moisture content of the air, can influence the impact of
particulates or environmental corrosives and gaseous contaminant transfer. In the absence
of specific limits that are set forth in this document, you must implement practices that
maintain particulate and gas levels that are consistent with the protection of human health
and safety. If Bull determines that the levels of particulates or gases in your environment
have caused damage to the server, Bull may condition provision of repair or replacement
of servers or parts on implementation of appropriate remedial measures to mitigate such
environmental contamination.
Implementation of such remedial measures is a customer responsibility.
Contaminant Limits
Particulate • The room air must be continuously filtered with 40%
atmospheric dust spot efficiency (MERV 9) according to
ASHRAE Standard 52.2
1
.
•
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
contamination must be more than 60%
2
.
• The room must be free of conductive contamination such as
zinc whiskers.
Gaseous • Copper: Class G1 as per ANSI/ISA 71.04-1985
3
•
Silver: Corrosion rate of less than 300 Å in 30 days
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.
Table B-1. Limits for particulates and gases