annual repair maintenance of e and m installations at coimbatore international airport . sh job contract for operation and comprehensive maintenance of the 3x330 tr hvac plant and ancillary equipments for 02 years - 1 screw water chilling units 330 tr 2 cooling towers 400tr 3 primary chilled water pump 12.5 hp 4 condenser water pump 40 hp 5 secondary chilled water pump with vfd 30 hp 6 water softening plant& pumps with parameters within the operational range 7 cooling tower make up water tanks of 5000 litre capacity 8 hvac lt panel 9 ahu with starter panel ( different capacity ) 10 in line fans ( different capacity ) 11 other equipments / installations: a. cooling tower water circulation system consisting of ms pipes, valves, strainers etc. b. chilled water circulation system consisting of insulated ms pipes, expansion tank ( insulated m s tank with 1000 liter capacity ) , all types of valves, strainers, motorized valves, etc. c. air circulation system consisting of insulated rectangular as well as spherical ducts, volume control dampers, fresh air dampers, motorized fire dampers, grills, diffusers, jet nozzles etc.