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Southern Human Services Center Smith Sinnett /2020072 <br />HVAC and Roof Renovations Orange County,North Carolina <br />VAV PACKAGED DX RTU 23 74 00 - 1 <br />SECTION 23 74 00 <br />VAV PACKAGED DX RTU <br />PART 1 GENERAL <br />1.01 GENERAL DESCRIPTION <br />A.This section includes the design,controls and installation requirements for packaged rooftop units / <br />outdoor air handling units. <br />1.02 REFERENCE STANDARDS <br />A.AHRI Standard 920 (I-P)2015 -Standard for Performance Rating of DX -Dedicated Outdoor Air <br />System Units <br />1.03 QUALITY ASSURANCE <br />A.Packaged air-cooled condenser units shall be certified in accordance with ANSI/AHRI Standard <br />340/360 performance rating of commercial and industrial unitary air-conditioning and heat pump <br />equipment. <br />B.Packaged air-cooled condenser units shall be certified in accordance with AHRI Standard 920 <br />performance rating of DX Dedicated Outdoor Air System Units. <br />C.Unit shall be certified in accordance with UL Standard 1995/CSA C22.2 No.236,Safety Standard <br />for Heating and Cooling Equipment. <br />D.Unit and refrigeration system shall comply with ASHRAE 15,Safety Standard for Mechanical <br />Refrigeration. <br />E.Unit Energy Efficiency Ratio (EER)shall be equal to or greater that prescribed by ASHRAE 90.1, <br />Energy Efficient Design of New Buildings except Low-Rise Residential Buildings. <br />F.Unit shall be safety certified by ETL and ETL US listed. Unit nameplate shall include the ETL/ETL <br />Canada label. <br />1.04 SUBMITTALS <br />A.Product Data:Literature shall be provided that indicates dimensions,operating and shipping <br />weights,capacities,ratings,fan performance,filter information,factory supplied accessories, <br />electrical characteristics and connection requirements.Installation,Operation,and Maintenance <br />manual with startup requirements shall be provided. <br />B.Shop Drawings:Unit drawings shall be provided that indicate assembly,unit dimensions, <br />construction details,clearances and connection details.Computer generated fan curves for each <br />fan shall be submitted with specific design operation point noted.Wiring diagram shall be provided <br />with details for both power and control systems and differentiate between factory installed and field <br />installed wiring. <br />1.05 DELIVERY,STORAGE,AND HANDLING <br />A.Unit shall be shipped with doors screwed shut and outside air hood closed to prevent damage <br />during transport and thereafter while in storage awaiting installation. <br />B.Follow Installation,Operation,and Maintenance manual instructions for rigging,moving,and <br />unloading the unit at its final location. <br />C.Unit shall be stored in a clean,dry place protected from construction traffic in accordance with the <br />Installation,Operation,and Maintenance manual. <br />1.06 WARRANTY <br />A.Manufacturer shall provide a limited “parts only”warranty for a period of 12 months from the date <br />of equipment startup or 18 months from the date of original equipment shipment from the factory, <br />whichever is less.Warranty shall cover material and workmanship that prove defective,within the <br />specified warranty period,provided manufacturer’s written instructions for Installation,Operation, <br />and maintenance have been followed.Warranty excludes parts associated with routine <br />maintenance,such as belts and filters. <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6