Engineered Systems - February 2009 - (Page 22) HVACRDesignerTips BY AMANDA MCKEW DESIGN REVIEW / DESIGN BUILD For Educational Facilities Equipment type: Dust collector equipment Equipment designation: DCE-1 Barcode designation: ####### Area served: Wood shop Equipment location: Outdoors adjacent to workshop HVAC INSPECTION/REQUIREMENTS • Has selection of DCE-1 been approved and signed off by owner? • Has the minimum duct pressure been determined for system? • Has the minimum duct velocities been determined for system? • Verify that ductwork is complete and correct. • Can the DCE-1 be installed with access for maintenance? • Can the DCE-1 be installed without removing other HVAC, electrical, plumbing, communication, and/ or fire protection distribution or equipment? • Has consideration been given to future expansion of system? • Has pressure testing of duct distribution been determined in scope of work? • Has system flushing been determined necessary, and if so, in scope of work? • Has DCE-1 cleaning been addressed? [Y] [N] ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ DESIGN REVIEW [Y] [N] ❍ ❍ • Verify adequate ventilation. ❍ • Spot-check air quantity for cfm/sq ft. ❍ • Create system flow diagram to assess static pressure sequence of operation, condenser water, and/or chilled water pressure drops. ❍ • Review duct distribution drawings to ensure adequate “dust carry” velocity is specified. ❍ • Review duct distribution drawings and architectural floor plans for duct cleanout and access panels in floor are specified. ❍ • Spot-check fan total static pressure by comparing with rule-of-thumb fan total static pressure of 4 in., based on duct distribution losses. ❍ • Confirm associated air terminal coil is piped correctly ❍ • Review control drawings and specifications and confirm unit space temperature setpoints are specified. ❍ • Review control drawings and specifications and confirm unit cfm setpoints are specified. ❍ • Review control drawings and specifications and confirm unit space temperature high/low alarm limits are specified. ❍ • Review control drawings and specifications and confirm alarm sequences are specified. ❍ • Review control drawings and specifications to determine if unit will operate completely through the BAS/BMS. ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ ❍ GENERAL CONDITIONS CONSIDERATIONS / REQUIREMENTS [Y] [N] ❍ ❍ ❍ ❍ ❍ ❍ • What are the necessary installation permitting and operation permitting requirements? ❍ • Has insurance certificates been submitted to building owner? ❍ • Will there be an extended warranty on the equipment? ❍ • Will there be a service contract submitted for the new DCE-1? ❍ REFERENCE ❍ • 2008 ASHRAE Handbook – HVAC Systems & Equipment, Chapter 1, “HVAC Systems Analysis and Selection” • 2007 ASHRAE Handbook – Applications, Chapter 6, “Educational Facilities” and Chapter 30, “Industrial Local Exhaust Systems” • 2005 ASHRAE Handbook — Fundamentals, Chapter 35, “Duct Design” • American Conference of Governmental Idustrial Hygienists Industrial Ventilation manual ELECTRICAL INSPECTION/REQUIREMENTS [Y] [N} ❍ ❍ ❍ ❍ ❍ ❍ ❍ • What are the new electrical requirements for the dust collector and work bench on-off exhaust damper? ❍ • Is there adequate electrical power to equipment? ❍ • Is there adequate electrical power coming in from the street? ❍ • Identify electrical scope of work required with DCE-1. ❍ • Will emergency power be required? ❍ • Are electrical connections tight and secure? ❍ • Have the fuses and wire sizes been checked and verified? ❍ • What electrical system components (existing conduits, etc.) will require removal, reinstallation, and/or relocation to accommodate new DCE-1? ❍ • Are there existing electrical code issues that should be addressed at this time? ❍ NOTE • Refer to equipment manufacturers’ literature for additional data and requirements. • Refer to building owner standards and guidelines for additional criteria. ES If you have any comments, suggestions, or questions regarding this designer checklist, contact Amanda McKew at amckew@ rdkengineers.com. ❍ ❍ 22 En gi neer ed S y stem s February 2009
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