Perambur Railway Hospital Renewal Of Comprehensive Annual Service Maintenance Contract For Maintenance Of 220 Tr Capacity Chiller Plant, Accessories Viz., Ah Us, Cooling Towers, Chiller Water Pumps And Condenser Water Pipelines Along With Its Allied Valves And Accessories Of Centralized Chilled Water Air Conditioning System At Southern Railway Headquarter Hospital (Old Railway Hospital), Perambur For A Period Of Three Years From The Date Of Issue Of Letter Of Acceptance