annual maintenance contract of low side equipments of a.c plant at nalco port facilities visakhapatnam.-monthly activities: (i) cleaning of cooling coils and air filters with water and detergent (ii) cleaning of water strainers (iii) checking of v belts of ahu fan, its tension , replacement of v belt including supply if found damaged (iv) thorough cleaning of ahu room, grills inside office rooms of each floor once in 04 months activities: (i) draining out old water from the chilled pipes, refilling fresh water and venting out air if required (ii) checking of alignment between ahu motor and pulley, making it right in case of mis-alignment (iii) greasing of ahu wheel/fan bearings servicing /overhauling of ahu motor(once in two years): servicing/overhauling of ahu motors (5 nos) including supply of bearings and all consumables (once during the 2-years contract). maintenance of cooling water pump motor and pipe line valves once in 04 months activities: (i) to check the gland packing of water pump and changing the same including supply of gland packing, nuts, bolts, washers, etc. (ii) to check the water pump motor terminations in motor tb and local mcb. making good the termination, if found defective, including supply of al materials like glands, lugs, tb, mcb and all consumables. (iii) to check the water pipe line butterfly valves for proper closing/opening and greasing of valves. cooling water pumps (once in a year) cooling water pump motor:3-ph, 7.5kw, 2900rpm, monobloc with pump, kirloskar make servicing/overhauling of motor and pump including supply of motor bearings, application of red insulating varnish and painting of motor(once during the contract).(all the materials to partys account) maintenance of electrical panel board once in 04 months activities: (i) cleaning of electrical panel board complete and tightening of all terminations (ii) checking of main switches, dol starters, cable terminations, mcbs of ahu rooms/local controls and replacement of the defective components, if any, is including supply. part-b: optional works (on requirement basis only and in case of breakdown) rewinding and complete overhauling of motors including supply of bearings, painting, all consumables, etc (2.2kw to 7.5kw, 3-phase, induction motors) supply and replacement of ahu blower wheel supply and replacement of defective butterfly valves of water pipeline including breaking and making of pipe line insulation cement plaster, chicken wire mesh, thermo cool, bitumen, etc)