IBM System x3500 Service Manual

Also see for x3500 - System - 7977: Brochure User guide Configuration and options guide Installation guide User guide

Contents

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 *** server *** device *** that isdescribed in this document. Risks that are posed by the presence of excessiveparticulate levels or concentrations of harmful gases include damage that mightcause the *** server *** device *** to malfunction or cease functioning altogether.This specification sets forth limits for particulates and gases that are intended toavoid such damage. The limits must not be viewed or used as definitive limits,because numerous other factors, such as temperature or moisture content of theair, can influence the impact of particulates or environmental corrosives andgaseous contaminant transfer. In the absence of specific limits that are set forth inthis document, you must implement practices that maintain particulate and gaslevels that are consistent with the protection of human health and safety. If IBMdetermines that the levels of particulates or gases in your environment have causeddamage to the *** server *** device ***, IBM may condition provision of repair orreplacement of *** servers *** devices *** or parts on implementation of appropriateremedial measures to mitigate such environmental contamination. Implementation ofsuch remedial measures is a customer responsibility.Table 8. Limits for particulates and gasesContaminant LimitsParticulate v The room air must be continuously filtered with 40% atmospheric dustspot 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 forRemoval Efficiency 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 controlsystems: Airborne contaminants. Instrument Society of America, Research Triangle Park,North Carolina, U.S.A.Documentation formatThe publications for this product are in Adobe Portable Document Format (PDF)and should be compliant with accessibility standards. If you experience difficultieswhen you use the PDF files and want to request a web-based format or accessiblePDF document for a publication, direct your mail to the following address:Information DevelopmentIBM Corporation205/A0153039 E. Cornwallis RoadP.O. Box 12195174 IBM System x3500 Type 7977: Problem Determination and Service Guide