service contract of water cooled hvac/packaged ac system installed at bcpl , lepetkata please refer tender documents . , quarterly preventive maintenance of 40/50 long text: quarterly preventive maintenance of 40/50/60 tr water cooled hvac system installed at different control buildings including ahu , blower motor , water cooled condensing unit , reciprocating compressor , evaporator coil , and fresh air fan etc . this includes attending of any breakdown problem within 24 hours without any additional cost . , annual maintenance/overhauling of 40/50 long text: annual maintenance/overhauling of 40/50/60 tr water cooled hvac system installed at different control buildings including ahu , blower motor , water cooled condensing unit , reciprocating compressor , evaporator coil , and fresh air fan etc . this includes attending of any breakdown problem within 24 hours without any additional cost . , preventive maintenance ( pm ) of freezekin long text:preventive maintenance ( pm ) of freezeking/bitzer make compressor installed at analyser flameproof hvac system located at various unit . # pm includes gas and oil filling , checking of compressor , blower , condenser , evaporator , and other components of the hvac system . , overhauling of freezeking/bitzer make co long text: overhauling of freezeking/bitzer make compressor installed at analyser flameproof hvac system located at various unit . # overhauling includes survey of the system for repair/replacement of the components of compressor and associated systems of the hvac . based on survey party shall supply the items to be replaced and complete the overhauling . cost of items to be supplied by the party shall be claimed through item sr . no . 7 . , scope of supply of refrigerant gases ( r1 long text: scope of supply of refrigerant gases ( r134a ) [make: mafron/floron] ( each cyclinder of 61kg ) , scope of supply of refrigerant gases ( r22 long text: scope of supply of refrigerant gases ( r22 ) [make: mafron/floron] ( each cyclinder of 60-65 kg ) , scope of supply of air handling unit pre long text: scope of supply of air handling unit pre filters-ccr al . pre filter 500w*500h*50 , 10mic . box , al . pre filter 400w*500h*50 , 10mic . box , ssr 1 al . pre filter 500w*600h*50 , 10mic . box , al . pre filter 500w*500h*50 , 10mic . box , ccr& srr1 chemical filters al . pre filter 585w*290h*145 , 10mic . box , 585w*585*145 , 10mic box;585w*290h*45 , 10mic . box , 585w*585*45 , 10mic box; spares for ssr1 compressor voltas model wcur060omnt; ucr&ss4 modelwcur040omnt , srr2&3 model wcur050omnt; spares for gsu analyser compressor freezeking model tf -450 , tf-265;misc work like brazing , supply of flexible hose , copper tubes etc . # total cost of supplied item shall be reimbursed with 10% overhead considering packing and transportation cost .