REPAIR/MAINTENANCE OF CENTRAL TYPE AC PLANTS, VRF AC PLANT AND PRECISION AIR CONDITIONING AT AF STN HALWARA UNDER GE (AF) HALWARA

Material and labour for carrying out the descaling of the shell & tube condensers suitable for by isolation of each condenser by providing of dummy plate for inlet & outlet connection and separation of condenser from water circulation without disturbing the operation of the AC Plant, carrying out the descaling by circulation of the diluted scale removing agent organic compound type chemical of RA III / chemtex Brand at the appropriate ratio depend upon the scale deposit inside copper tube by forced circulation and opening the end covers, manually brushing the copper tubes with nylon brushes of various size to remove complete scale, de-greasing with caustic soda solution and flushing out with fresh water, refixing all disconnected pipes lines, end covers with new rubber gasket and opening water line valves and checking of water leakages, apply grease to all MS bolts & nuts and put the condensers of 12.5 TR to 20 TR in operational complete all as specified and directed by Engr-in-charge.

Material and labour for carrying out the descaling of the shell & tube condensers suitable for by isolation of each condenser by providing of dummy plate for inlet & outlet connection and separation of condenser from water circulation without disturbing the operation of the AC Plant, carrying out the descaling by circulation of the diluted scale removing agent organic compound type chemical of RA III / chemtex Brand at the appropriate ratio depend upon the scale deposit inside copper tube by forced circulation and opening the end covers, manually brushing the copper tubes with nylon brushes of various size to remove complete scale, de-greasing with caustic soda solution and flushing out with fresh water, refixing all disconnected pipes lines, end covers with new rubber gasket and opening water line valves and checking of water leakages, apply grease to all MS bolts & nuts and put the condensers of 21 TR to 50 TR in operational complete all as specified and directed by Engr-in-charge.

Material and labour for dismantling and overhauling of condenser/ Chiller/ hot water pump set of capacity 10 HP, dismantling pump and motor separately, cutting the burnt out winding from slots and rewinding the same by existing size and gauge of super enamalled copper wire including varnishing, heating, repairing the insulating materials, repalcing bearings, bushes and remetalling the shaft including necessary heat treatment, and repairing the pump, including replacing the gland packing, bearings and all rusted nuts and bolts, washers and remetaling the Impeller of suitable size and bore for lifting the water from source and reassembling the motor and pump with gland packing includings painting of pump and motor assambly complete with two coats of super enameled paints over one coats of red oxide, fixing the motor & pump at its position and connecting the suction and delivery water pipe and testing under working conditions complete all as specified and directed by Engr-in-Charge.

Material and labour for dismantling and overhauling of condenser/ Chiller/ hot water pump set of capacity 7.5 HP, dismantling pump and motor separately, cutting the burnt out winding from slots and rewinding the same by existing size and gauge of super enamalled copper wire including varnishing, heating, repairing the insulating materials, repalcing bearings, bushes and remetalling the shaft including necessary heat treatment, and repairing the pump, including replacing the gland packing, bearings and all rusted nuts and bolts, washers and remetaling the Impeller of suitable size and bore for lifting the water from source and reassembling the motor and pump with gland packing includings painting of pump and motor assambly complete with two coats of super enameled paints over one coats of red oxide, fixing the motor & pump at its position and connecting the suction and delivery water pipe and testing under working conditions complete all as specified and directed by Engr-in-Charge.

Material and labour for dismantling and overhauling of condenser/ Chiller/ hot water pump set of capacity 5 HP, dismantling pump and motor separately, cutting the burnt out winding from slots and rewinding the same by existing size and gauge of super enamalled copper wire including varnishing, heating, repairing the insulating materials, repalcing bearings, bushes and remetalling the shaft including necessary heat treatment, and repairing the pump, including replacing the gland packing, bearings and all rusted nuts and bolts, washers and remetaling the Impeller of suitable size and bore for lifting the water from source and reassembling the motor and pump with gland packing includings painting of pump and motor assambly complete with two coats of super enameled paints over one coats of red oxide, fixing the motor & pump at its position and connecting the suction and delivery water pipe and testing under working conditions complete all as specified and directed by Engr-in-Charge.

Material and labour for dismantling and overhauling of condenser/ Chiller/ hot water pump set of capacity 3 HP, dismantling pump and motor separately, cutting the burnt out winding from slots and rewinding the same by existing size and gauge of super enamalled copper wire including varnishing, heating, repairing the insulating materials, repalcing bearings, bushes and remetalling the shaft including necessary heat treatment, and repairing the pump, including replacing the gland packing, bearings and all rusted nuts and bolts, washers and remetaling the Impeller of suitable size and bore for lifting the water from source and reassembling the motor and pump with gland packing includings painting of pump and motor assambly complete with two coats of super enameled paints over one coats of red oxide, fixing the motor & pump at its position and connecting the suction and delivery water pipe and testing under working conditions complete all as specified and directed by Engr-in-Charge.

Taking down carefully burnt out electric driven AHU blower motor 20 HP capacity after disconnecting main electric supply from the motor starter panel, dismantling motor carefully for checking, removing to workshop for repairing, taking out burnt, coils from the slots of stator, other accessories such as ball bearing, rotor, cleaning the stator slots and rewinding the same with new super enamelled copper winding wire, heating, varnishing, re-assembling the same after greasing the ball bearing motor refixing to original position after repairing from workshop, reinstallation on existing channel and reconnecting to electric supply, commissioning and testing complete all as specified and as directed by Engr-in-Charge.

Taking down carefully burnt out electric driven AHU blower motor 15 HP capacity after disconnecting main electric supply from the motor starter panel, dismantling motor carefully for checking, removing to workshop for repairing, taking out burnt, coils from the slots of stator, other accessories such as ball bearing, rotor, cleaning the stator slots and rewinding the same with new super enamelled copper winding wire, heating, varnishing, re-assembling the same after greasing the ball bearing motor refixing to original position after repairing from workshop, reinstallation on existing channel and reconnecting to electric supply, commissioning and testing complete all as specified and as directed by Engr-in-Charge.

Taking down carefully burnt out electric driven AHU blower motor 10 HP capacity after disconnecting main electric supply from the motor starter panel, dismantling motor carefully for checking, removing to workshop for repairing, taking out burnt, coils from the slots of stator, other accessories such as ball bearing, rotor, cleaning the stator slots and rewinding the same with new super enamelled copper winding wire, heating, varnishing, re-assembling the same after greasing the ball bearing motor refixing to original position after repairing from workshop, reinstallation on existing channel and reconnecting to electric supply, commissioning and testing complete all as specified and as directed by Engr-in-Charge.

Taking down carefully burnt out electric driven AHU blower motor 7.5 HP capacity after disconnecting main electric supply from the motor starter panel, dismantling motor carefully for checking, removing to workshop for repairing, taking out burnt, coils from the slots of stator, other accessories such as ball bearing, rotor, cleaning the stator slots and rewinding the same with new super enamelled copper winding wire, heating, varnishing, re-assembling the same after greasing the ball bearing motor refixing to original position after repairing from workshop, reinstallation on existing channel and reconnecting to electric supply, commissioning and testing complete all as specified and as directed by Engr-in-Charge.