repair / maintenance of central ac chillar plant and supply of refrigerant gas and other allied essential items under ge ( af ) borjhar- m&l for pressure testing of the refrigeration circuit of air cooled chiller plant ( 3 x 80 tr ) capacity ( make - voltas limited ) with nitrogen pressure, identification of leak and rectification of same by necessry brazing arrangement at site after completion of brazing work again testing the pressure using nitrogen pressure to ensure proper rectification leakages complete all as specified and as directed. 2 m&l for vacuumising of the refrigeration system, charging of fresh refrigerant ( r- 407c ) in the compressor system ( air cooled chiller model acds080dpmn2x2, capacity 241920kcal / hr package with compressor 4 x 20 tr - 03 nos ) as per requirement with all necessary arrangement at site and recommissioning the system complete all as specified and as directed. 3 m&l for replacement of 2 nos condenser relieve valve and 12 nos crank case heater complete all as specified and as directed 4 m&l for repairing of 4 nos liquid hand shut-up valve, fixing of 5 nos catch-all core all as complete all as specified and as directed. 5 material and labour for throughily servicing of 3x80 tr chilling unit and associated microprocessor control panel complete all as specified and directed 6 supply of refrigerant gas, r-134a in cylinder 7 supply of refrigerant gas, r-410a in cylinder 8 supply of refrigerant gas, r-22 in cylinder 9 supply of refrigerant gas, r-32 in cylinder 10 supply of remote for split type ac 1.5 tr / 2.0 tr make : lg / as per sample / existing 11 supply of remote for window type ac 1.5 tr / 2.0 tr make : voltas / as per sample / existing 12 supply of battery ( aaa ) for remote control. make : duracell ( type-ultra alkaline ) / equivalent model from approved make. 13 supply of battery ( aa ) for remote control. make : duracell ( type-ultra alkaline ) / equivalent model from approved make. 14 supply of highly absorbent multipurpose cleaning cloth. make: as per sample held available with e / m store note for sl item no 1 to 5:- the items catered in boq shall be carried out through m / s voltas ltd and bidder should submit mou with m / s voltas ltd to participate in bidding for maintenance of above mentioned air cooled chiller plant. during technical evaluation the same will be followed to qualify for the bidder criteria.the bidder should be uploaded scan pdf copy of mou with m / s voltas ltd in cover 1.