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Southern Human Services Center Smith Sinnett /2020072 <br />HVAC and Roof Renovations Orange County,North Carolina <br />Testing,Adjusting,and Balancing for HVAC <br /> 23 05 93 - 6 <br />a.Air Flow of Supply and Return: Deviation of more than 10 percent of instrument reading. <br />b.Minimum Outside Air Flow: Deviation of more than 20 percent of instrument reading;for <br />inlet vane or VFD OSA compensation system using linear proportional control,deviation <br />of more than 30 percent at intermediate supply flow. <br />c.Temperatures: Deviation of more than one degree F. <br />d.Air and Water Pressures: Deviation of more than 10 percent of full scale of test <br />instrument reading. <br />e.Sound Pressures: Deviation of more than 3 decibels,with consideration for variations in <br />background noise. <br />5.For purposes of re-check,a whole system is defined as one in which inaccuracies will have <br />little or no impact on connected systems;for example,the air distribution system served by <br />one air handler or the hydronic chilled water supply system served by a chiller or the <br />condenser water system. <br />E.In the presence of the Commissioning Authority,verify that: <br />1.Final settings of all valves,splitters,dampers and other adjustment devices have been <br />permanently marked. <br />2.The air system is being controlled to the lowest possible static pressure while still meeting <br />design loads,less diversity;this shall include a review of TAB methods,established control <br />setpoints,and physical verification of at least one leg from fan to diffuser having all balancing <br />dampers wide open and that during full cooling of all terminal units taking off downstream of <br />the static pressure sensor,the terminal unit on the critical leg has its damper 90 percent or <br />more open. <br />3.The water system is being controlled to the lowest possible pressure while still meeting <br />design loads,less diversity;this shall include a review of TAB methods,established control <br />setpoints,and physical verification of at least one leg from the pump to the coil having all <br />balancing valves wide open and that during full cooling the cooling coil valve of that leg is 90 <br />percent or more open. <br />3.10 SCOPE <br />A.Test,adjust,and balance the following: <br />1.HVAC Pumps. <br />2.Boilers. <br />3.Air Cooled Refrigerant Condensers. <br />4.Packaged Roof Top Heating/Cooling Units. <br />5.Air Coils. <br />6.Air Handling Units. <br />7.Fans. <br />8.Air Filters. <br />9.Air Terminal Units. <br />10.Air Inlets and Outlets. <br />B.This Section does NOT include: <br />1.Testing boilers and pressure vessels for compliance with safety codes. <br />2.Specifications for materials for patching mechanical systems. <br />3.Specifications for materials and installation of adjusting and balancing;refer to the respective <br />system sections for materials and installation requirements. <br />4.Requirements and procedures for piping and ductwork systems leakage tests. <br />3.11 MINIMUM DATA TO BE REPORTED <br />A.Electric Motors: <br />1.Manufacturer. <br />2.Model/Frame. <br />3.HP/BHP. <br />4.Phase,voltage,amperage;nameplate,actual,no load. <br />5.RPM. <br />6.Service factor. <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6