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Lenovo 46M4002 Installation And Maintenance Manual
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Particulate contaminationAttention: Airborne particulates (including metal flakes or particles) and reactive gases acting alone or incombination with other environmental factors such as humidity or temperature might pose a risk to thedevice that is described in this document.Risks that are posed by the presence of excessive particulate levels or concentrations of harmful gasesinclude damage that might cause the device to malfunction or cease functioning altogether. Thisspecification sets forth limits for particulates and gases that are intended to avoid such damage. The limitsmust not be viewed or used as definitive limits, because numerous other factors, such as temperature ormoisture content of the air, can influence the impact of particulates or environmental corrosives and gaseouscontaminant transfer. In the absence of specific limits that are set forth in this document, you mustimplement practices that maintain particulate and gas levels that are consistent with the protection of humanhealth and safety. If Lenovo determines that the levels of particulates or gases in your environment havecaused damage to the device, Lenovo may condition provision of repair or replacement of devices or partson implementation of appropriate remedial measures to mitigate such environmental contamination.Implementation of such remedial measures is a customer responsibility.Table 5. Limits for particulates and gasesLimits for particulates and gasesContaminant LimitsParticulate • The room air must be continuously filtered with 40% atmospheric dust spot efficiency (MERV9) according to ASHRAE Standard 52.21.• 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 71.04-19853• Silver: Corrosion rate of less than 300 Å in 30 days1 ASHRAE 52.2-2008 - Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency byParticle 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 absorbsenough water to become wet and promote ionic conduction.3 ANSI/ISA-71.04-1985. Environmental conditions for process measurement and control systems: Airbornecontaminants. Instrument Society of America, Research Triangle Park, North Carolina, U.S.A.Telecommunication regulatory statementThis product may not be certified in your country for connection by any means whatsoever to interfaces ofpublic telecommunications networks. Further certification may be required by law prior to making any suchconnection. Contact a Lenovo representative or reseller for any questions.Electronic emission noticesWhen you attach a monitor to the equipment, you must use the designated monitor cable and anyinterference suppression devices that are supplied with the monitor.Appendix D. Notices 69 |
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