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Round 1 Bowling and Amusement 12/09/2024 Paradigm Design <br />Main Place Mall Expansion Grand Rapids, MI <br />Santa Ana, California <br />Project #2309147GR <br />1.Measure total airflow. <br />a.Where sufficient space in ducts is unavailable for Pitot-tube traverse <br />measurements, measure airflow at terminal outlets and inlets and calculate the total <br />airflow. <br />2.Measure fan static pressures as follows to determine actual static pressure: <br />a.Measure outlet static pressure as far downstream from the fan as practical and <br />upstream from restrictions in ducts such as elbows and transitions. <br />b.Measure static pressure directly at the fan outlet or through the flexible connection. <br />c.Measure inlet static pressure of single-inlet fans in the inlet duct as near the fan as <br />possible, upstream from the flexible connection, and downstream from duct <br />restrictions. <br />3.Measure static pressure across each component that makes up an air-handling unit, <br />rooftop unit, and other air-handling and -treating equipment. <br />a.Report the cleanliness status of filters and the time static pressures are measured. <br />4.Review Record Documents to determine variations in design static pressures versus <br />actual static pressures. Calculate actual system-effect factors. Recommend adjustments <br />to accommodate actual conditions. <br />5.Obtain approval from Construction Manager for adjustment of fan speed higher or lower <br />than indicated speed. Comply with requirements in Division 23 Sections for air-handling <br />units for adjustment of fans, belts, and pulley sizes to achieve indicated air-handling-unit <br />performance. <br />6.Do not make fan-speed adjustments that result in motor overload. Consult equipment <br />manufacturers about fan-speed safety factors. Modulate dampers and measure fan-motor <br />amperage to ensure that no overload will occur. Measure amperage in full-cooling, full- <br />heating, economizer, and any other operating mode to determine the maximum required <br />brake horsepower. <br />B.Adjust volume dampers for main duct, submain ducts, and major branch ducts to indicated <br />airflows within specified tolerances. <br />1.Measure airflow of submain and branch ducts. <br />a.Where sufficient space in submain and branch ducts is unavailable for Pitot-tube <br />traverse measurements, measure airflow at terminal outlets and inlets and calculate <br />the total airflow for that zone. <br />2.Measure static pressure at a point downstream from the balancing damper, and adjust <br />volume dampers until the proper static pressure is achieved. <br />3.Remeasure each submain and branch duct after all have been adjusted. Continue to <br />adjust submain and branch ducts to indicated airflows within specified tolerances.