Lenovo Flex System EN2092 User Manual

Also see for Flex System EN2092: Product guide

Contents

Lenovo makes no representations or warranties with respect to non-Lenovoproducts. Support (if any) for the non-Lenovo products is provided by the thirdparty, not Lenovo.Some software might differ from its retail version (if available) and might notinclude user manuals or all program functionality.Particulate contaminationAttention: Airborne particulates (including metal flakes or particles) and reactivegases acting alone or in combination with other environmental factors such ashumidity or temperature might pose a risk to the device that is described in thisdocument.Risks that are posed by the presence of excessive particulate levels orconcentrations of harmful gases include damage that might cause the device tomalfunction or cease functioning altogether. This specification sets forth limits forparticulates and gases that are intended to avoid such damage. The limits must notbe viewed or used as definitive limits, because numerous other factors, such astemperature or moisture content of the air, can influence the impact of particulatesor environmental corrosives and gaseous contaminant transfer. In the absence ofspecific limits that are set forth in this document, you must implement practicesthat maintain particulate and gas levels that are consistent with the protection ofhuman health and safety. If Lenovo determines that the levels of particulates orgases in your environment have caused damage to the device, Lenovo maycondition provision of repair or replacement of devices or parts on implementationof appropriate remedial measures to mitigate such environmental contamination.Implementation of such remedial measures is a customer responsibility.Table 3. Limits for particulates and gasesContaminant LimitsParticulate v The room air must be continuously filtered with 40% atmosphericdust spot efficiency (MERV 9) according to ASHRAE Standard 52.2 1.v Air that enters a data center must be filtered to 99.97% efficiency orgreater, using high-efficiency particulate air (HEPA) filters that meetMIL-STD-282.v The deliquescent relative humidity of the particulate contaminationmust be more than 60% 2.v The room must be free of conductive contamination such as zincwhiskers.Gaseous v Copper: Class G1 as per ANSI/ISA 71.04-1985 3v Silver: Corrosion rate of less than 300 Å in 30 days1 ASHRAE 52.2-2008 - Method of Testing General Ventilation Air-Cleaning Devices for RemovalEfficiency by Particle Size. Atlanta: American Society of Heating, Refrigerating andAir-Conditioning Engineers, Inc.2 The deliquescent relative humidity of particulate contamination is the relative humidity atwhich 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, NorthCarolina, U.S.A.Appendix B. Notices 37