bids are invited for repair / maintenance of ac plant at awacs store 4 wing under ge ( af ) tech area-1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 supply and fixing in replacement filter of existing capacity and size complete all as specefied. supply and fixing in expansion valve for 3 x 15 tr ac plant complete all as specefied and directed. s&f in replacement of v belt of existing size for air handling unit, complete all as specefied and directed. supply and fixing in replacement overload relay complete all as specefied and directed. s&finreplacementsinglephasepreventorforprotectionsystemfromsinglephasingcompleteallasspecefied and directed. supplyandfixinreplacementpressuregauge100mmdial0-21kg / cm2ratingcompleteallasspecefiedand directed. descalingoftheentirewatercirculationgsystemforcentralacplantwatercooledthreeunit3x15tracplantwatercooledalongwithcondensors, coolingtower / pipingpumpsetc.openingcondensorbydisconnectingnutboltsandcleaningwithdescalingsolutionwithhelpofdescalingpump / wirebrush, cleaning rod etc circulating above solution in condensor pipe lines as requried time, flushing out the gasleakagetestingandrepairof3x15trentirerefregerationsystemandflushingofoilfromcoolingcoilbynitrogengas, cleaning&washingfins, removingthealldustparticlesincludingsoldering / weldingetcfor sealing and testing complete all as specefied and directed supply&fixingofcompressorofcap7.5tr ( modelnosz185s4rcmake:danfoss ) afterdisconnection of old compressor from base frame and tesing complete all as specefied and directed supply and filling refrigerent gas r-407 c complete all as specefied. dismantlingandtakingdownelectricmotorofcapacity7.5hpandstripopeningandrewindingwithsuperenamelledcopperwindingwireofsamegaugewithproperclassofinsulationandapplyingvarnish, dryingetcincludingreplacementofbearingsreassemblingthemotor, reinstallationinsamepositingcompleteincluding testing complete all as specefied and directed. all as per item no 7 above but electric motor of capacity 3.0 hp s&f in replacement contactor 3 phase 32 amp 415 volt, complete all as specefied and directed. s&finreplacementwatertemperaturesensoer ( in&outwater ) of3x15tracplantcompleteallasspecefied and directed. s&finreplacementofbutterflyvalve ( 125mm ) , includingrubbergasket, nutboltwashercompleteallasspecefied and directed. s&f in replacement air release valve complete all as specefied and directed. s&f in replacement of lp / hp switch of 3 x 15 tr ac plant complete all as specefied and directed. s&finreplacementwatertemperaturegaugesuitablefor15tracplantcompleteallasspecefiedanddirected.