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2021-414-E-AMS-Riggs-Harrod Builders, Inc-SHSC Roof & HVAC Replacement
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2021-414-E-AMS-Riggs-Harrod Builders, Inc-SHSC Roof & HVAC Replacement
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Last modified
8/3/2021 3:29:08 PM
Creation date
8/3/2021 3:22:07 PM
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Contract
Date
6/24/2021
Contract Starting Date
6/25/2021
Contract Ending Date
7/28/2021
Contract Document Type
Contract
Amount
$1,348,479.00
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Southern Human Services Center Smith Sinnett /2020072 <br />HVAC and Roof Renovations Orange County,North Carolina <br />HVAC Air-Distribution System Cleaning 23 <br />01 30.51 - 4 <br />locate the equipment down wind and away from all air intakes and other points of entry into the <br />building. <br />C.Use any cleaning method recommended by NADCA ACR unless otherwise specified;do not use <br />methods prohibited by NADCA ACR,or that will damage HVAC components or other work,or that <br />will significantly alter the integrity of the system.It is the contractor’s responsibility to select Source <br />Removal methods that will render the HVAC system Visibly Clean and capable of passing cleaning <br />verification methods (See applicable NADCA Standards)and other specified tests,in accordance <br />with all general requirements. No cleaning method,or combination of methods,shall be used <br />which could potentially damage components of the HVAC system or negatively alter the integrity of <br />the system <br />1.All methods used shall incorporate the use of vacuum collection devices that are operated <br />continuously during cleaning. A vacuum device shall be connected to the downstream end of <br />the section being cleaned through a predetermined opening. The vacuum collection device <br />must be of sufficient power to render all areas being cleaned under negative pressure,such <br />that containment of debris and the protection of the indoor environment are assured. <br />2.All vacuum devices exhausting air inside the building shall be equipped with HEPA filters <br />(minimum efficiency),including hand-held vacuums and wet-vacuums. <br />3.All vacuum devices exhausting air outside the facility shall be equipped with Particulate <br />Collection including adequate filtration to contain Debris removed from the HVAC system. <br />Such devices shall exhaust in a manner that will not allow contaminants to re-enter the <br />facility. Release of debris outdoors must not violate any outdoor environmental standards, <br />codes or regulations. <br />4.All methods require mechanical agitation devices to dislodge debris adhered to interior HVAC <br />system surfaces,such that debris may be safely conveyed to vacuum collection devices. <br /> Acceptable methods will include those,which will not potentially damage the integrity of the <br />ductwork,nor damage porous surface materials such as liners inside the ductwork or system <br />components. <br />D.Obtain Owner's approval before using wet cleaning methods;ensure that drainage is adequate <br />before beginning. <br />E.Ducts: Mechanically clean all portions of ducts. <br />F.Hoses,Cables,and Extension Rods: Clean using suitable sanitary damp wipes at the time they <br />are being removed or withdrawn from their normal position. <br />G.Registers,Diffusers,and Grilles: When removing,take care to prevent containment exposure due <br />to accumulated debris. <br />H.Coils: Follow NADCA ACR completely including measuring static pressure drop before and after <br />cleaning;do not remove refrigeration coils from system to clean;report coils that are permanently <br />impacted. <br />I.Air handling units,terminal units (VAV,Dual duct boxes,etc.),blowers and exhaust fans: The <br />contractor shall insure that supply,return,and exhaust fans and blowers are thoroughly cleaned. <br /> Areas to be cleaned include blowers,fan housings,plenums (except ceiling supply and return <br />plenums),scrolls,blades,or vanes,shafts,baffles,dampers and drive assemblies. All visible <br />surface contamination deposits shall be removed in accordance with NADCA Standards. <br /> Contractor shall: <br />1.Clean all air handling units (AHU)internal surfaces,components and condensate collectors <br />and drains. <br />2.Assure that a suitable operative drainage system is in place prior to beginning wash down <br />procedures. <br />3.Clean all coils and related components,including evaporator fins. <br />J.Fibrous Glass Material: Use HEPA vacuuming equipment,under constant negative pressure,do <br />not permit to get wet,and do not damage surfaces;replace material damaged by cleaning <br />operations. <br />K.Existing Damaged Fibrous Glass Material: Report to Architect/Engineer all evidence of damage, <br />deterioration,delaminating,friable material,mold or fungus growth,or moisture that cannot be <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6
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