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OC Sportsplex Pool HVAC Unit Replacement <br />PDC Project 23022 Testing,Adjusting,and Balancing for <br />HVAC 23 05 93 - 6 <br />G.Mark on drawings the locations where traverse and other critical measurements were taken and <br />cross reference the location in the final report. <br />H.After adjustment,take measurements to verify balance has not been disrupted or that such <br />disruption has been rectified. <br />I.Leave systems in proper working order,replacing belt guards,closing access doors,closing doors <br />to electrical switch boxes,and restoring thermostats to specified settings. <br />J.Seal ducts and piping,and test for and repair leaks. <br />K.Seal insulation to re-establish integrity of vapor barrier. <br />L.Retest,adjust,and balance systems subsequent to significant system modifications and resubmit <br />test results. <br />3.07 AIR SYSTEM PROCEDURE <br />A.Adjust air handling and distribution systems to provide required or design supply,return,and <br />exhaust air quantities at site altitude. <br />B.Test,adjust,and balance the air systems before the hydronic systems. <br />C.Make air quantity measurements in ducts by Pitot tube traverse of entire cross sectional area of <br />duct. <br />D.Measure air quantities at air inlets and outlets. <br />E.Adjust distribution system to obtain uniform space temperatures free from objectionable drafts and <br />noise.This includes adjusting the deflection of all diffuser and grilles. <br />F.Use volume control devices to regulate air quantities only to extent that adjustments do not create <br />objectionable air motion or sound levels.Effect volume control by duct internal devices such as <br />dampers and splitters. <br />G.Vary total system air quantities by adjustment of fan speeds. Provide drive changes required. <br /> Vary branch air quantities by damper regulation. <br />H.Measure static air pressure conditions on air supply units,including filter and coil pressure drops, <br />and total pressure across the fan.Make allowances for 50 percent loading of filters. <br />1.Artificially load filters by partially blanking to produce static pressure air drop of filter <br />manufacturer's recommeneded "dirty"pressure drop. <br />I.Coordinate with Controls Contractor on adjusting static pressure setpoints of VAV systems and <br />differential pressure setpoints of VFD controlled pumps. <br />J.Adjust outside air automatic dampers,outside air,return air,and exhaust dampers for design <br />conditions. <br />K.Measure temperature conditions across outside air,return air,and exhaust dampers to check <br />leakage. <br />L.Where modulating dampers are provided,take measurements and balance at extreme conditions. <br />Balance variable volume systems at maximum air flow rate,full cooling,and at minimum air flow <br />rate,full heating. <br />M.Measure building static pressure and adjust supply,return,and exhaust air systems to provide <br />required relationship between each to maintain approximately 0.05 inches positive static pressure <br />near the building entries. <br />N.For variable air volume system powered units set volume controller to air flow setting indicated. <br /> Confirm connections properly made and confirm proper operation for automatic variable air <br />volume temperature control. <br />O.Single-duct,dual-duct,and fan-powered VAV boxes shall be calibrated using a multi-point <br />calibration approach.Single-point calibration will not be acceptable. <br />1.Check and readjust ATU flow rates as necessary to meet design criteria.Balance air <br />distribution from ATU on full cooling maximum scheduled cubic meters per minute (cubic feet <br />per minute).Reset room thermostats and check ATU operation from maximum to minimum <br />Docusign Envelope ID: D4F3B98E-0756-4A0C-A3AD-05AA32D39F1C