REPAIR/MAINTENANCE OF CENTRAL TYPE AC PLANTS AND REPAIR MAINTENANCE OF VRF TYPE AC AND DUCTABLE AC UNDER 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 amd 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 amd 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 amd 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 amd 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.

Taking down carefully burnt out electric driven AHU blower motor 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.

Taking down carefully burnt out electric driven AHU blower motor 3 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 cooling tower motor 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 supper enameled 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 3 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.

Material and labour for servicing of Monoblock Centrifugal pump set by greasing, cleaning the shaft replacing gland packing/ bush bearing of existing size, replacement of unserviceable nut, bots, washers, rushted flanged & couplers/impeller etc. 3 to 10 HP pump set complete all as specified and directed by Engr-in-charge.

Material and labour for cleaning and servicing of FRP cooling tower of central type AC Plant of cap 25 TR to 100 TR, removal of water tray, pipe line and cleaning of cooling tower fins by using brush complete all as specified and directed by Engineer-in-Charge.

Pressure testing / leak arresting , vaccuming with dry nitrogen gas at the maximum pressure of 300 to 400 PSI / oil charging, including replacing the unserviceable strainers all as required and testing complete for the Central type AC Plant of each unit capacity 13 to 50 TR at various locations/buildings of tech area and all as specified and directed by Engr- in-charge . Note :- (i) Refregerant Gas R-22/407/410 and strainers will be measured and paid seperately under suply only items. (ii) The Nitrigen gas pressure should be not less then 350 PSI during Leak arresting of the plants and it will hold the same pressure upto 24 hours and vaccum pressure should not be less then (-30 micron Pressure) during the Vaccuming of plants.

Material and labour for leak testing of AHU unit cooling/heating coil of AC Plant after pumping down the complete system, isolating the cooling coil from both ends and charging the dry nitrogen gas for pressure leak test, after detecting leak point, release the nitrogen gas, repairing the leak point by means of soldering/brazing and connecting the cooling coil with system, vaccumised the complete system and re-charge the system by refrigerant, testing and commissioning upto satisfactory cooling performance of the plant complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of unserviceable Humidistat including electrical connection complete all as specified and directed by Engr-in-charge.

Material and labour for replacement of unserviceable heater strip type 3kW capacity as per existing size complete all as specified and directed by Engr-in-charge.

Material and labour for replacement of unserviceable heater 2/3kW capacity for pan type humidifier and hot water generator as per existing size & model complete all as specified and directed by Engr-in-charge.

Material and labour for servicing of pan type humidifier floor mounted/ installed at duct of capacity 6 /12 kW including cleaning of tank, checking of all inlet & outlet connection, checking and repair of all electrical control connections and making the pan type humidifier functional including replacement of minor parts required at site complete all as specified and directed by Engr-in-charge.

Taking down defective compressor sealed unit 13 TR (Approx) capacity,make Danfoss model No SM185S4RC , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Taking down defective compressor sealed unit 12 TR (approx) capacity,make Danfoss model No SZ185S4RC , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Taking down defective compressor sealed unit 13.5 TR capacity,make Daikin model No JT355DJ-Y1 , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Taking down defective compressor sealed unit 13 TR (approx) capacity,make Danfoss model No SZ185S4RC , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Taking down defective compressor sealed unit 11 TR (approx) capacity,make Danfoss model No SZ147A4ALB , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Taking down defective compressor sealed unit 4.5 TR (approx) capacity,make Copeland model No ZR57KS-TFD-522 , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Taking down defective compressor sealed unit 5.5 TR (approx) capacity, , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Taking down defective compressor sealed unit 4.5 TR (approx) capacity,makeSANYO Model No C-SB453H8A, 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Material and labour for Servicing of AHU complete of various capacities including cooling coil,heating coil, filters, removing dirt, scales etc with cleaning chemicals (coil cleaner) complete all as specified and as directed by Engr-in-Charge.

Material and labour for Servicing of blower indoor unit of package/ductable type AC Plant of capacity of each unit 4.5TR to 22 TR with solvent material by using pressure water pump, servicing fan motor complete and painting with one coats of enamel paint on outer body complete all as specified and directed by Engr-in-Charge.

Material and labour for Servicing of condensor unit including cleaning of condensor coil with and fins with solvent material by using pressure water pump, servicing fan motor complete and painting with one coats of enamel paint on outer body complete all as specified and directed by Engr-in-Charge.

Pressure testing / leak arresting, vaccuming with dry nitrogen gas at the maximum pressure of 300 to 400 PSI / oil charging, including replacing the unserviceable strainers all as required and testing complete for the Package /ductable type AC Plant of capacity of each unit 4.5TR to 22 TR at any location/ building of tech area and complete all as specified and directed by Engr - in charge. Note :- (iI) Refregerant Gas R-22/407/410/403 will be measured and paid seperately under suply only items. (ii) The Nitrigen gas pressure should be not less then 350 PSI during Leak arresting of the plants and it will hold the same pressure upto 24 hours and vaccum pressure should not be less then (-30 micron Pressure) during the Vaccuming of plants.

Supply only refrigerant mafron Gas M-22 in company sealed cylinder complete all as specified and directed by Engr-in-Charge.

Supply only refrigerant gas R-407C in company sealed cylinder complete all as specified and directed by Engr-in-Charge.

Supply only Nitrogen gas in company sealed cylinder complete all as specified and directed by Engr-in-Charge. Note for Sl. Item No.35-37 :-(i) The empty cylinder shall be returned to contractor for further return to campany after consumption of Gas.

Material and labour for Servicing of electric control panel/ compressure control pannel board by taking out the burnt wire. Supply & fixing new wire of existing specification with clipping and socketing and dressing properly complete all as specified and directed by Engr-in-Charge.

Material and labour for Insulation of MS Pipe with Nitrile Rubber sheet of 19mm complete for size 32 mm dia MS pipe complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of rotational moulded polyethene PVC tank 3 layered of capacity 2000 ltrs for use as makeup water tank for cooling Tower (cylinderical vertical with closed top) hoisted and fixed in position of made on iron frame / fabricated works and including all fitting complete all as specified and directed at site by Engr-in-Charge.

Supply and fixing in replacement of rotational moulded polyethene PVC Expansion water tank of capacity 3 layered, 500 ltrs for use as makeup water tank for chilled water (cylinderical vertical with closed top) hoisted and fixed in position of made on iron frame / fabricated works with and including all fitting complete all as specified and directed at site by Engr-in-Charge.

Supply and fixing in replacement of entering water temperature (EWT) sensor as per existing model & make complete all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacement of leaving water temperature (LWT) sensor as per existing model & make complete all as specified and as directed by Engr-in-Charge.

Supply and fixing of PVC fills of size (450x300x150mm), sutaible for any type of cooling tower of central air conditioning plant complete all as specified and directed by Engineer-in-Charge.

Supply, fixing and testing of single phase preventer VSP2/VSP1 having auxiliary supply 415 Volts Bi-metal thermal over load relay various ranges starting from 3 Amps to 15 Amps including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of electronic timer star Delta, 240-415V timing 3s-120s complete as per existing make & model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of, MVPD , range 30-22 Amps ,aux supply 230 VAC for AC Plant complete as per existing make & model including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of Microprocessor controller based operating control board including display, step down transformer & sensor suitable for Model No. WCUR0350MN, Make : Voltas including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of PCB controller including display, step down transformer & sensor suitable for Model No.- XWC2S-026A, Make- Blue Star including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of PCB controller including display, step down transformer & sensor suitable for Model No.- DPUAS055Y, Make- Voltas complete all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacement of PCB controller including display, step dowm transformer & sensor suitable for Model No.- DPA 1052R1, Make- Blue Star including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of PCB controller including display, step down transformer & sensor suitable for Model No.- WCUS1-015, Make- Blue Star complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of power contactor 4 pole for AC circuit with AC Coils voltage 220-240 Volt including over load relay 16 Amps complete as per existing make & model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of power contactor 3 pole MLI-5 for AC circuit with AC Coils voltage 240/250 Volt including over load relay 25 Amps complete as per existing make & model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of power contactor 4 pole for AC circuit with AC Coils voltage 220-240 Volt ,over load relay 32-40 Amps complete as per existing make & model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of safety valve 300 PSI of copper material suitable for 25 TR to 100 TR capacity Central/package type AC Plant (as per existing make and model) including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of HP/LP control switch as per existing make and model including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of thermometer suitable for chilled and condenser water pipe line complete including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of pressure transistor sensor for suction, discharge & oil complete all as per existing make and model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of pressure gauge suitable for chilled and condenser water pipe line complete including taking down unserviceable materials complete all as specified and directed by Engr-in-Charge.

Supply and fixing in repair of cooling tower fan motor of capcity 3HP, 3 Phase, 440 Volts and 50/60 Htz and not less than 960 RPM suitable for any type and made of cooling tower, including all accessories like nuts, bults washer and clamps etc and taking down old unserviceable existing one complete all as specified and directed by Engineer-in Charge.

Supply and fixing in repair of cooling Tower aluminium fan blades 1200 mm dia with coupling hub suitable for existing (set of four blades) existing shape, size and model suitable for 3 HP CT fan Motor and upto 70 TR capacity Cooling tower complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement AHU filter suitable for AHU of size (610X610X50 mm) as per existing size, make and model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of AHU filter suitable for AHU of size (305X610X50 mm) as per existing size, make and model complete all as specified and directed by Engr-in-Charge.

Taking out the blower motor including shaft from the AC Plant of capacity 5.0 TR to 22 TR, rewinding, welding and grinding on Lathe to make suitable alignment with bearing and refixing complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of runner of blower drum for package unit of AC Plant of capacity 4.5 TR to 22TR complete including taking down unserviceable materials all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of fan blade suitable for air cooled condensor of AC Plant of capacity 4.5 TR to 22TR including taking down unserviceable materials all as specified and directed by Engr-in-Charge.

Supply and fixing in repair of bearing of blower motor suitable for package units of AC Plant of capacity 4.5 TR to 22 TR complete including taking down unserviceable materials all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of connector 36 to 40 A, 440 Volt TP & TPN complete all as specified and as directed by Engr-in-Charge.

Material and labour for Visit of AC technician having minimum 5 yrs of experience for maintenance and attending complaint including minor repairs and making the plant in serviceable condition of the central type AC Plants of 12.5 TR to 50 TR capacity comprising of all minor parts and machineries including charging of R - 410/407/22 Gas and when ever required repair and maint of compressor and chiller,blower motor, air filters, de-humidifying coils, IT control pannels, PCB, ducts and accessories of all gauges and meters and keeping in perfect working condution all as specified and directed by the Engr-in-charge. Note : Leak test, refrigerant gas compressure /chiller /blower motor /panels and other major spares will be measured and paid separetely under relevant item of schedule if any required. The complaint of non-funtioning of any unit of air conditioner installed at any location must be attended within 24 hrs and the repair work must be completed with 48 hrs failure to this will lead to a recovery of Rs. 500.00 per hrs of delay for 24 hrs incase of failure of technician to and attend the complaints and Rs. 1000.00 per hrs after 48 hrs for delay in repair leading to unserviceability of the plant.

Maintenance and attending complaint including minor repairs and making in serviceable condition of the package type AC Plants of 4.5 TR to 22 TR capacity comprising of all minor parts and machineries including charging of R - 410/407/22 Gas and whenever required repair and maint of compressor and blower motor, air filters, de-humidifying coils, IT control pannels, PCB, ducts and accessories of all gauges and meters and keeping in perfect working condition all as specified and directed by the Engr-in-charge. Note : Leak test, refrigerant gas compressure /chiller /blower motor /panels and other major spares will be measured and paid separetely under relevant item of schedule if any required. The complaint of non-funtioning of any unit of air conditioner installed at any location must be attended within 24 hrs and the repair work must be completed with 48 hrs failure to this will lead to a recovery of Rs. 500.00 per hrs of delay for 24 hrs incase of failure of technician to and attend the complaints and Rs. 1000.00 per hrs after 48 hrs for delay in repair leading to unserviceability of the plant.

Supply and charging lubricating oil for scroll type compressor with refrigerant R407 Mineral oil 160P complete all as specified and as directed by Engineer-in-Charge.

Supply and charging lubricating oil for scroll type compressor with refrigerant R22 Mineral oil 160P complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing in repair of non returning valve of 80 mm dia valve PN-10 including gasket, nut bolts complete all as per specified and directed by Engr-in-Charge.

Supply and fixing in repair of butterfly valve of 80 mm dia valve PN-1 0 with handle for manual operation including gasket, nut bolts complete all as per specified and directed by Engr-in-Charge.

Supply and fixing in repair of butterfly valve of 65 mm dia valve PN-1 0 including gasket, nut bolts complete all as per specified and directed by Engr-in-Charge.

Supply and fixing in repair of balancing valve of 65/80 mm pipe size for balancing of chilled water/ condenser water pipe line dia valve PN-1 0 including gasket, nut bolts complete all as per specified and directed by Engr-in-Charge.

Supply and fixing in repair of water flow switch for connection to chilled & condenser water pipe line as per existing make & model complete all as per specified and directed by Engr-in-Charge.

Supplying and fixing for sprinkler assembly with branch pipe aluminium suitable for FRP cooling tower capacity 25TR to 60TR including taking down existing complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in repair of digital clock temperature & humidity measurer complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in repair of LED indication Lamps for R,Y,B Phase in LT panel boards / feeder pillar boxes including disconnecting and removing existing defective item from electric circuit including necessary connected fastners, burnt cables, accessories etc. all as per site requirement/existing make/model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in repair of Push button switches (Red and Green, in Colour) in LT panel boards / feeder pillar boxes including disconnecting and removing existing defective item from electric circuit including necessary connected fastners, burnt cables, accessories etc. all as per site requirement/existing make/model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in repair of Ammemeter analog type range above 100A below 300A in LT panel boards / feeder pillar boxes including disconnecting and removing existing defective item from electric circuit including necessary connected fastners, burnt cables, accessories etc all as per site requirement/ existing make/model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in repair of Voltmeter Analog type range upto 600Volts in LT panel boards / feeder pillar boxes including disconnecting and removing existing defective item from electric circuit including necessary connected fastners, burnt cables, accessories etc all as per site requirement/existing make/model complete all as specified and directed by Engr-in-Charge.

Supply and fixing in repair of Coil sensor for package type C plant of 4.5/ 8.5/ 5.5/ 22 TR Capacity, (suitable for Blue Star/ Voltas make) , complet all as specified and directed by Engr-in-Charge.

Supply and fixing in repair 4 Core 10 Sqmm multistrand copper conductor PVC insulated sheathed flexible cable suitable for connection of package/central type AC Plant complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in repair 4 Core 6 Sqmm multistrand copper conductor PVC insulated sheathed flexible cable suitable for connection of package/central type AC Plant complete all as specified and directed by Engineer-in-Charge.

Supply and fixing in repair of MCB TPN 63 Amps for connection of package/central type AC Plant as main incommer outgoing complete all as specified and directed by Engineer-in-Charge.

Supply and fixing of V belt as per existing size & model complete all as specified and directed by Engr-in-Charge.

Material and labour for replacement of unserviceable canvas cloths heavy duty of package/central type AC Plants including provision of zip 150 mm lenth for opening and closing arrangements and properly fasterners with bolts and nuts between the ducts and dumpers of the plants complete all as specified and directed by the Engr-in-Charge.

Supply and fixing in replacement of solonoid valve, capacity 12.5 TR to 21 TR as per existing size & model complete all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacement of solonoid valve, capacity 24 TR to 60TR as per existing size & model complete all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacement of expansion valve suitable for 12.5 TR to 21 TR as per existing size & model tonne capacity complete all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacement of expansion valve suitable for 24 TR to 50TR as per existing size & model capacity complete all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacement of MCCB 63A 4pole 25KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of MCCB 100A 4pole 25KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of MCCB 160 A 4pole 25KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of MCCB 200 A 4pole 25KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of MCCB 250 A 4pole 36 KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of MCCB 315 A/320 A 4pole 36KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacment of of 22 TR HMI Scroll Chiller display including controller, step down transformer & sensor suitable for Model Make- Voltas complete all as specified and as directed by Engr-in-Charge.

Material and labour for carrying out Servicing of 62 HP VRF type AC plant with 04 Nos outer Unit and 22 Nos indoor unit Make Voltas complete Such as carrying out routine inspection, Service, cleaning of AC plant, Checking of motor Bushes , Cleaning of Condensor fan, Air Filter , evaporator and condensor Coil, checking of all control wiring , Display panel and make all setting as per site requriement complete to the satisfaction of Engr in Charge

Material and labour for carrying out Servicing of 11 TR AC (2x5.5 TR ) Ductable Split AC type AC plant with 02 Nos outer Unit and 2 Nos indoor unit Make Voltas complete Such as carrying out routine inspection, Service, cleaning of AC , Checking of motor Bushes , Cleaning of Condensor fan, Air Filter , evaporator and condensor Coil, checking of all control wiring , Display panel and make all setting as per site requriement to the satisfaction of Engr in Charge

Maintenance and attending complaint including minor repairs and making VRF type AC Plants 62 HP capacity serviceable comprising of all minor parts . major components required shall be measured and paid separately.The complaint of non-funtioning of any unit of air conditioner installed at any location must be attended within 24 hrs and the repair work must be completed with 48 hrs failure to this will lead to a recovery of Rs. 500.00 per hrs of delay for 24 hrs incase of failure of technician to and attend the complaints and Rs. 1000.00 per hrs after 48 hrs for delay in repair leading to unserviceability of the plant.

Taking down carefully burnt out electric driven blower motor of VRF Plant out door unit any capacity after disconnecting main electric supply,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 blower motor of VRF Plant indoor door unit any capacity after disconnecting main electric supply,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.

M&L for Pressure testing / leak arresting , vaccuming with dry nitrogen gas at the maximum pressure of 300 to 400 PSI / oil charging, including replacing the unserviceable strainers all as required and testing complete for VRF AC Plant 62 HP all as specified and directed by Engr- in-charge . Note :- (i) Refregerant Gas 410 and strainers will be measured and paid seperately under suply only items. (ii) The Nitrigen gas pressure should be not less then 350 PSI during Leak arresting of the plants and it will hold the same pressure upto 24 hours and vaccum pressure should not be less then (-30 micron Pressure) during the Vaccuming of plants.

M & L for taking down defective compressor DC inverter V4 plus-K Series sealed unit , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

M & L for taking down defective compressor make Hitachi Model No E655DHD-65D2YD, 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

M & L for taking down defective Suction Acumulator Make DQ Model No QYFLQ-43VB , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same suction acumulator compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Supply only refrigerant gas R-410A in company sealed cylinder complete all as specified and directed by Engr-in-Charge.

Supply only refrigerant gas R-407C in company sealed cylinder complete all as specified and directed.

Supply only Nitrogen gas in company sealed cylinder complete all as specified and directed. Note for Sl. Item No.10-12 :-(i) The empty cylinder shall be returned to contractor for further return to campany after consumption of Gas. .

Supply and fixing in replacement of all PCB card suitable for 62 TR VRF Plant Make-Voltas including taking down unserviceable materials making the plant operational complete all as specified and directed. Note : The payment for card shall be made only post successful testing of same in Presence of Engr In Charge

Supply and fixing in replacement of MCCB 160 A 4pole 25KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of MCCB 200 A 4pole 25KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of MCCB 250 A 4pole 36 KA with Adjustable thermal & fixed magnetic setting Ics =100% of Icu.complete all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement of fan blade suitable for air cooled condensor of AC of capacity 5.5 TR including taking down unserviceable materials all as specified and directed by Engr-in-Charge.

Supply and fixing in repair of bearing of blower motor suitable for AC of capacity 5.5 TR complete including taking down unserviceable materials all as specified and directed by Engr-in-Charge.

Taking down defective compressor sealed unit 5.5 TR (approx) capacity, , 3 phase 415 volt of central type AC Plant after disconnecting all electrical connections and replaced the same with new compressor of same capacity and compatible with exisitng system,including flushing the old gas, nitogen leak test and rechanging with appropriate quantity of refrigerant gas complete all as specified and as directed and testing to the satisfaction of Engr in Charge.

Supply and fixing in replacement of all PCB card suitable for5.5 TR Ductable Split AC Make-Voltas including taking down unserviceable materials making the plant operational complete all as specified and directed. Note : The payment for card shall be made only post successful testing of same in Presence of Engr In Charge