T H E W O R L D L E A D E R I N C L E A N A I R S O L U T I O N SINSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONSSAAF™Air Purification SystemsRecirculation Unit and Pressurization and Recirculation UnitTable of Contents1.0 Introduction1.1 About this Document1.2 Packaging and Shipping,Receiving and Inspection,Handling and Storage1.3 Product Descriptions1.4 Product Model Designations1.5 Product Drawings1.6 Assembly – General Comments1.7 Related System Equipment2.0 Principles of Operation2.1 General2.2 Recirculation System2.3 Pressurization System3.0 Installation Instructions3.1 Space Requirements3.2 Foundations, Supports,and Anchoring3.3 Typical RU Housing Details3.4 General Filter SystemInstallation Procedure3.5 Preparation for Filter Installation3.6 Prefilter Installation3.7 Gas-Phase ChemicalFilter Installation3.8 Afterfilter Installation3.9 High-Efficiency Filter Installation3.10 Latch RU Doors3.11 Pressure Gauge3.12 Fans4.0 Start-up Instructions5.0 Maintenance5.1 Prefilter5.2 Afterfilter5.3 High-Efficiency Final Filters5.4 Gas-Phase Filter Monitoring5.5 Removal and Replacement ofParticulate and Gas-PhaseChemical Filters5.6 Disposal of Used Filters5.7 Gas-Phase Chemical FilterCassette Face Sealing Gaskets5.8 Afterfilter and High-EfficiencyParticulate Filter SealingGaskets5.9 Access Door Sealing Gaskets5.10 General System Maintenance6.0 Troubleshooting6.1 High Pressure Drop ReadingAcross the Filter System6.2 Visible Discharge of Particulate6.3 Odors and Smells6.4 Vibration7.0 Spare Parts List8.0 Equipment Characteristics,Dimensions, Operating Weights,and Shipping Weights9.0 Technical Guidelines9.1 Fan Selection and Sizing1.0 Introduction1.1 About this DocumentThis document contains theinformation necessary to properlyreceive, assemble, install, operate,and maintain the AAF FlandersRecirculation Unit (RU) andPressurization and RecirculationUnit (PRU) filter systems and filters.The purchaser, installer, and operatorof the filter system MUST read andcomply with this document in itsentirety prior to installation of theequipment and its operation. Failure tocomply with the requirements of thismanual may void the product warranty.CAUTION: These instructionsare specific to the AAF FlandersRecirculation Unit and Pressurizationand Recirculation Unit filtersystems and filters. All ancillarytasks including, but not limited to,electrical and mechanical work,equipment handling, and safetyprocedures must be performed inaccordance with industry-acceptedpractice and all relevant local, state,and federal government codes,laws, and policies.NOTE: The AAF FlandersRecirculation Unit andPressurization and RecirculationUnit filter systems and filters aresimilar in most respects. For ease ofreading, this manual will refer onlyto the Recirculation Unit. Unlessspecifically stated otherwise, allreferences to the RecirculationUnit will apply equally to thePressurization and RecirculationUnit. A detailed description of bothsystems can be found in section2.0, Principles of Operation.