Chiller System Replacement: a. Removal of (2) existing chillers, chilled water pumps, dual temperature water pumps, hot water pumps, changeover valves, bypass valves, chilled water piping on roof, chilled water piping in mechanical room, and associated electrical and automatic controls. b. Installation of new chiller, chilled water piping to unit on grade, chilled water piping in mechanical room, chilled water pumps, dual temperature water pumps, hot water pumps, water specialties, changeover valves, bypass valves, insulation, controls and appurtenances. c. Hydronic/chilled piping modification to provide chiller primary / secondary pump arrangement. d. Factory startup and commissioning of new chilled water systems and applicable controls. e. Provide new system controls and associated system programming within existing BMS system. Program as required to provide primary/secondary pumping with dual temperature water pumps.