annual maintenance contract of ( non comprehensive ) of water coolers with ro / water purifier , annual maintenance contract ( non-comprehensive ) of water coolers with ro / water purifier having capacity of equal or less than 99 liters installed at iit roorkee , greater noida extension center , and saharanpur campus , including re-filling of gas whenever required for proper cooling . fully serviced quarterly ( minimum 4 services yearly ) of water coolers with roi water purifier and unlimited call breakdown will be part of the contract . period: one ear from the date of issue of p . o . , annual maintenance contract ( non-comprehensive ) of water coolers with ro / water purifier having capacity 100 liters and above installed at lit roorkee , greater noida extension center , and saharanpur campus , including re-filling of gas whenever required for proper cooling . fully serviced quarterly ( minimum 4 services yearly ) ofwater coolers with ro / water purifier and unlimited call breakdown will be part of the contract . period: one year from the date of issue of p . o . , supply & replacement of reciprocating type compressor for less than 99 liters water coolers including gas refilling , supply & replacement of reciprocating type compressor for 100 liters and above water coolers , including gas refilling . , supply & replacement ofmembrane in r . o . , supply & replacement of pf bowl set , supply & replacement of pre-carbon filter , supply & replacement of post-carbon filter , supply & replacement of sediment filter , supply & replacement of fan motor heavy duty , supply & replacement of thermostat switch . , supply & replacement of relay , supply & replacement of running capacitor 36 to 50 mfd . , supply & replacement of water cooler tap . heavy duty , supply / fixing of 3 core 2 . 5 sq . mm flexible copper cables . make: havells / finolex / polycab , supply / fixing of 16 a plug top . make: havells / mk / legrand / schneider / abb , supply & replacement of float valve , denting of water cooler . , painting of water cdoler . , l-connector , r . o . tap , de-calcium , dual cartage , candle 10 , r . o . weight sensor , solenoid valve , uv carbon black , r . o . pump 24 / 48 watt , r . o . adapter 24 watt , r . o . adapter 48 watt , pcb ( for aqua guard classic model or others ) , photo resistor ( for aqua guard classic model or others ) , pvc pipe wood graded pl-4 / pl-6 , pvc connection , solid valve u . v . ( ultra ) , ultra violet tube 11 / 4 / 8 watt , dismanting of water cooler & shifting to appropriate store , installation of water cooler