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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 - 3 <br />E.TAB Supervisor Qualifications: Professional Engineer licensed in the State in which the Project is <br />located. <br />3.02 EXAMINATION <br />A.Verify that systems are complete and operable before commencing work. Ensure the following <br />conditions: <br />1.Systems are started and operating in a safe and normal condition. <br />2.Temperature control systems are installed complete and operable. <br />3.Proper thermal overload protection is in place for electrical equipment. <br />4.Final filters are clean and in place. If required,install temporary media in addition to final <br />filters. <br />5.Duct systems are clean of debris. <br />6.Fans are rotating correctly. <br />7.Fire and volume dampers are in place and open. <br />8.Air coil fins are cleaned and combed. <br />9.Access doors are closed and duct end caps are in place. <br />10.Air outlets are installed and connected. <br />11.Duct system leakage is minimized. <br />12.Hydronic systems are flushed,filled,and vented. <br />13.Pumps are rotating correctly. <br />14.Proper strainer baskets are clean and in place. <br />15.Service and balance valves are open. <br />16.Clean and set automatic fill valves for required system pressure. <br />17.Check expansion tanks to determine that they are not air bound and that the system is <br />completely full of water. <br />18.Check air vents at high points of systems and determine if all are installed to bleed air <br />completely. <br />B.Submit field reports. Report defects and deficiencies that will or could prevent proper system <br />balance. <br />C.Beginning of work means acceptance of existing conditions. <br />3.03 PREPARATION <br />A.Hold a pre-balancing meeting at least one week prior to starting TAB work. <br />1.Require attendance by all installers whose work will be tested,adjusted,or balanced. <br />B.Obtain design drawings and specifications and become thoroughly acquainted with the design <br />intent. <br />C.Obtain copies of approved shop drawings of all air handling equipment,outlets (supply,return,and <br />exhaust)and temperature control diagrams. <br />D.Compare design to installed equipment and field installations. <br />E.Walk the system to determine variations of installation from design. <br />F.Check filters for cleanliness. <br />G.Lubricate all motors and bearings. <br />3.04 ADJUSTMENT TOLERANCES <br />A.Air Handling Systems: Adjust to within plus or minus ​10​percent of design for supply systems and <br />plus or minus ​10​percent of design for return and exhaust systems. <br />B.Air Outlets and Inlets: Adjust total to within plus ​10​percent and minus ​5​percent of design to <br />space. Adjust outlets and inlets in space to within plus or minus ​10​percent of design. <br />C.Hydronic Systems: Adjust to within plus or minus 5 percent of design. <br />3.05 RECORDING AND ADJUSTING <br />A.Field Logs: Maintain written logs including: <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6