REPAIRS AND MAINTENANCE OF CENTRAL AC PLANT COOLING TOWERS DESCALING REPAIRS TO SUCTION DISCHARGE PIPE LINE CONTROL VALVES DRIVE PANELS AND REPAIRS TO LT CONTROL PANELS AND SWITCH GEARS OF AC PLANTS REPAIRS TO DUCTABLE PACKAGE TYPE

Material and labour for disconnecting electrical connections, removing the defective scroll compressor three phase, 10 to13TR capacity from the mounting bed of central type Air Conditioner plant , dismantle the unit by cutting and rewinding the compressor coil with Freon resistance Super enamelled copper wire and replace bearing and worn out parts of compressor with lathe work for proper alignment with fill up of lub oil and assemble the unit , fixed in Central AC plant Testing and commissioning chiller package AC system complete. The job is inclusive of cutting, transporting brazing the suction and discharge lines by, reconnecting at site as specified and directed by Engg-in-charge. Note : (i) Refrigerant charging will be measured and paid separately under relevant. (ii) Rewinding will be carried out through OEM only.

Material and Labour for carry out the leak test at any capacity of central AC plant refrigeration systems by charging the dry nitrogen gas & hold up to 24hrs and rectifying the leakage if any by brazing/ welding/ replacing the spare parts if any etc, complete all as specified and directed by Engg-in-charge. Note :- The Spares measured and paid separately under respective items below.

Material and labour for recharging R-407A/ R-410A Refrigerant gas complete all as specified and directed by Engg-in-charge.

Material and Labour for recharging R-22/ R-32 Refrigerant gas complete all as specified and directed by Engg-in-charge.

Material and Labour for descaling the shell and tube condensors as per standard practice disconnecting the pipe line connection and removing the end cover, circulating diluted hydrochloric acid by pumping into copper tubes minimum half an hour and brushing. These copper tubes to be cleaned with nylon brush for removal of dirt and scales without damaging the tubes, removal of scales from the end cover and after ensuring all dirt and scales is removed wash the tubes with clean water in minimum one hour till all dust particles, scales washed out and re-assemble the condensor unit connect the pipe line and test and ensure the condensor working properly for the capacity upto 72TR complete all as specified and directed by Engg-in-charge.

Taking down electric motor of capacity 5 HP from Cooling tower/Chilled water pump set/Condenser water pump sets etc., carefully from its position and servicing complete including open the motor greasing, oiling and replacing of ball bearing rusted nuts, bolts, washers refixing the same position and painting with a coat of synthetic enamel paint over a coat red oxide primer complete for the following electric motors complete all as specified and directed by Engg-in-charge.

Taking down electric motor of capacity 7 HP from Cooling tower/Chilled water pump set/Condenser water pump sets etc., carefully from its position and servicing complete including open the motor greasing, oiling and replacing of ball bearing rusted nuts, bolts, washers refixing the same position and painting with a coat of synthetic enamel paint over a coat red oxide primer complete all as specified and directed by Engg-in-charge.

Taking down electric motor of capacity 10 HP from Cooling tower/Chilled water pump set/Condenser water pump sets etc., carefully from its position and servicing complete including open the motor greasing, oiling and replacing of ball bearing rusted nuts, bolts, washers refixing the same position and painting with a coat of synthetic enamel paint over a coat red oxide primer complete all as specified and directed by Engg-in-charge.

Taking down electric motor of capacity 12.5 HP from Cooling tower/Chilled water pump set/Condenser water pump sets etc., carefully from its position and servicing complete including open the motor greasing, oiling and replacing of ball bearing rusted nuts, bolts, washers refixing the same position and painting with a coat of synthetic enamel paint over a coat red oxide primer complete all as specified and directed by Engg-in-charge.

Taking down electric motor of capacity 15 HP from Cooling tower/Chilled water pump set/Condenser water pump sets etc., carefully from its position and servicing complete including open the motor greasing, oiling and replacing of ball bearing rusted nuts, bolts, washers refixing the same position and painting with a coat of synthetic enamel paint over a coat red oxide primer complete all as specified and directed by Engg-in-charge.