biennial maintenance contract for air conditioners installed in public buildings , guest houses , hostels of ntpc lara township area , servicing of ac , servicing of window ac , servicing of split ac , servicing of duct ac , dismantling of window ac , dismantling of split ac , installation of split ac , supply and instn of spares , supply and instln of compressor 1 . 5t , compressor 04 ton 3 phase tower ac , odu condenser coil split ac copper , idu evaporator coil copper split ac , pcb indoor unit , pcb repairing , exhaust fan odu with motor split ac , blower idu with motor , contactor odu split ac , copper pipe with insulation cover , dead nut valve 1/4 , dead nut valve 1/2 , dead nut valve 5/8 , dead nut valve 7/8 , capacitor of odu split ac 1 . 5t , capacitor of idu motor 1 . 5t split ac , capacitor tower ac , display unit idu , gas filling/top-up , temprature sensor , drain pipe , remote controller , tower ac 3 phase 4t idu pcb , tower ac 3 phase 4t odu pcb , tower ac 3 phase 4t idu blower with moto , tower ac 3 phase 4t odu fan with motor , pop putti , contactor tower ac 3 phase , duct ac compressor 3 phase ( 5t ) , fan blade odu ( 1 . 5 to 4 ton ac ) , odu fan motor split ac ( 1 . 5 to 2 ton ac ) , odu fan motor tower ac ( 4t ) , pcb for odu duct ac ( 8 . 5t/5t ) , pcb for idu duct ac ( 8 . 5t/5t ) , duct ac compressor 3 phase ( 8 . 5 ton ) , amount linked to safety aspects/ complia ( minimum 3% of total contract value , please quote amount )