repairing descaling and allied works of the air handling units installed at new emergency block of gmch jammu.-repair to the cooling coils of air handling units 04 no’s installed at new emergency block of gmch jammu by way of supplying water through inlet and closing the outlet valves of the air handling units. identifying the leakages of cooling coils by marking the same and draining out the water from the cooling coils and repairing of the cooling coils by way of copper brazing process and also repairing the damaged fins of the ahus coils and then filling the coils of the ahus with nitrogen gas by making the proper arrangement and checking of the leakages by smearing soap water on the repaired cooling coils and observing the bubble formation and repeating the copper brazing process till no leakage is detected, after proper testing, removing the nitrogen gas from the coils. job also includes descaling of the air handling units 04 no’s by way of disconnecting of main chiller pipeline from the cooling coil and then descaling of the copper tubes of the coil with the help of special chemical, cleaning of fins, flushing of the line back to cooling coil, filling the water in the line and tubes/cooling coils. job also includes dismantling the motor 04 no’s, pulleys-04 no’s and then shifting to the workshop for rewindingof the motor-3 no with proper copper conductor, repairing the shafts of the motor by welding/brazing and making it to the required size on lathe machine and p/f bearings in place of damaged ones to the pulleys-04 no, shifting the motors & pulleys back to the site and refitting the same and testing the motor on load after making the electrical connections. the job also includes replacing of worn out v-belts and alignment of blower pulleys and motor pulleys. the job also includes cleaning of ac vents, grills and diffuser plates in the new emergency block by engaging manpower. complete job includes the cost of material, tools and tackles, labour charges and all kinds of taxes.