The principal features of the Work to be performed under this Contract include, but are not limited to the following: Selective Demolition: a. Remove existing rooftop HVAC units, interior AHU components, supply/return ductwork, piping, controls, and associated electrical feeders. b. Remove portions of acoustic ceilings, soffits, roof curbs, pads, and exterior metal panels as needed for new work. Mechanical: a. Furnish and install new packaged rooftop equipment, ductwork, hydronic and condensate piping, insulation, dampers, fire-stopping at penetrations, vibration/seismic supports, equipment pads, and automatic DDC controls. b. Provide testing, adjusting, and balancing (TAB) of new and existing systems. 3, Existing HVAC System Cleaning: a. Clean, disinfect, and verify existing supply/return ductwork and plenums scheduled to remain. Coatings and Protection: a. Apply factory/field anticorrosion coatings to new coils, circuitry, and exposed HVAC metals as specified. Electrical: a. Provide new feeders, branch circuits, disconnects, VFDs, panel modifications, grounding, and lighting revisions required for HVAC equipment and ceiling work. Architectural: a. Patch and trim new duct penetrations through the exterior soffit; install new exterior louver/ trim assemblies. b. Remove and reinstall acoustical panel ceilings disturbed by mechanical/electrical work; replace damaged components. Commissioning and Closeout: a. Start-up, testing, and TAB of all new HVAC systems. b. Provide demonstration and training for Owner staff. c. Deliver O&M manuals and record documents.
