Reconfigured chilled water and condensing water piping from primary – secondary system to variable primary system. Replaced all chilled water and condensing water piping and pumps. Added VFDs to all pumps and cooling towers. Enhanced capacity of flat plate heat exchanger. Added 700 ton variable speed centrifugal chiller to grow total plant capacity to 2,700 tons. Integrated control system. Total central plant energy consumption reduced by 45-50%.