REPAIR / MAINTENANCE AND SERVICING OF CENTRAL AC PLANT AT LMN, F and G, QR 1,2,6,10 and 7,8,9 PLANTS AND REPLACEMENT OF INSULATION SHEET OVER FALSE CEILING AT AF STN GURGAON UNDER GE ( AF) GURGAON No 01

Amount

Pressure testing for entire system of the following AC plant including condenser, compressor and circulating system with CO2/Nitrogen gas and retain to allow the pressure for three days. If found any leakage or reduction in the scale of pressure shall be located and arrest the leakage immediately by soldering or any appropriate measure are to be taken to stop the leakage premanently

AC plant-35 TR capacity

AC plant-50 TR capacity

AC plant -75/80 TR capacity

Pump down existing refrigerant in separate cylinder. Disconnection of electric motor of compressor refrigerant line gauges pipe opening and dismantling of compressor for general servicing and maintenace of capacity 50 TR to carry out the inspection of compressor, carry out the general servicing of compressor including replacement of springs, aluminum washer packing screw work cleaning detergent cotton waste, etc and cleaning the suction filter oil filter replacing the all defective parts. Assembling the compressor testing for leakage with nitrogen gas and rectify them. Re-charging of refrigerant R-407c, and testing on connected load the compressor complete all as specified and directed. Note : All Unserviceable/defective parts of compressor and refrigerant includes this item.

Pump down existing refrigerant in separate cylinder. Disconnection of electric motor of compressor refrigerant line gauges pipe opening and dismantling of compressor for general servicing and carry out the inspection of compressor, carry out the general servicing of compressor including 80 TR replacement of springs, aluminum washer packing screw work cleaning detergent cotton waste, etc and cleaning the suction filter oil filter replacing the defective parts. Assembling the compressor testing for leakage with nitrogen gas and rectify them. Re-charging of refrigerant R-407c, and testing on connected load the compressor complete all as specified and directed. Note : All Unserviceable/defective parts of compressor and refrigerant includes this item.

Pump down existing refrigerant in separate cylinder. Disconnection of electric motor of compressor refrigerant line gauges pipe opening and dismantling of compressor for general servicing and maintenace of 75 TR to carry out the inspection of compressor, carry out the general servicing of compressor including replacement of springs, aluminum washer packing screw work cleaning detergent cotton waste, etc and cleaning the suction filter oil filter replacing the all defective parts. Assembling the compressor testing for leakage with nitrogen gas and rectify them. Re-charging of refrigerant R-407c, and testing on connected load the compressor complete all as specified and directed. Note : All Unserviceable/defective parts of compressor and refrigerant includes this item.

Pump down existing refrigerant in separate cylinder. Disconnection of electric motor of compressor refrigerant line gauges pipe opening and dismantling of compressor for general servicing and maintenace of capacity 35 TR to carry out the inspection of compressor, carry out the general servicing of compressor including replacement of springs, aluminum washer packing screw work cleaning detergent cotton waste, etc and cleaning the suction filter oil filter replacing the all defective parts. Assembling the compressor testing for leakage with nitrogen gas and rectify them. Re-charging of refrigerant R-407c, and testing on connected load the compressor complete all as specified and directed. Note : All Unserviceable/defective parts of compressor and refrigerant includes this item.

Opening of condenser cover of both sides of compressors including disconnecting of water pipe line for inlet and outlet of all condensers of each plant. Removing scale/sludge precipitated in the copper tube by push and pull method with iron rod connected with steel wire brush of suitable size as per condenser copper tube size in the entire length of condenser and scraping down the sludge precipitated in side the tube. Closing both side of condenser and circulating the descaling soulation in all tube of all condenser of each plant through the circulating pump and allows holding it for 30 minutes for chemical reaction. Opening both sides of the condenser both sides and clean with iron rod connected with nylon brush of suitable size as per condensor copper tube size at the entire length of condensors ensure that descaling process has been complete then closing the condenser at both end and circulating clean water in all the tube of three condensors of each plant and drain out the process will continue till satisfaction of Engr-in-Charge then fixing new gasket for both ends of the three condenser of each plant tighten with new nut end bolt for the following plants :-

AC plant-35 TR capacity

AC plant-50 TR capacity

AC plant -75/80 TR capacity

Dismantling inlet & outlet connection of water pipe lines, wiremesh all-around the cooling tower of any capacity, pvc fins, CT fan and motor and incomming connection of electric supply and other related items all as per site requirement complete. Note- Replacement of worn out nut and bolt shall be the part of this job.

Cleaning cooling tower by applying wire brush, washing powder and other solvent by removing the deposited impurities such as silt, dust particles mud/ sand inside the dome and around the fins, on wiremesh, main shaft etc and other connected items all as specified and directed:-

Capacity - 160 TR

Capacity - 100 TR

M&L for blocking punctured tubes of the following condensers with brass pillet complete all as specified and directed :-

AC plant-35 TR capacity

AC plant-50 TR capacity

AC plant -75/80 TR capacity

Vacuum system and after maintaining vacuum for 24 hours supply and charging refrigerant gas R-407C complete all as specified and directed.

Supply and fill in replacement of compressor oil non freezing type N-62/64/68 complete all as specified and directed Note- This item includes detection and rectification of leakage of oil.

Supply and replacement of PVC fills block for cooling tower of size 600 X 300 X 150 mm complete all as specified and directed.

Removing of Alpha filter from its position and layout at site for refixing after clearing, AHU cooling coil using chemical with brass brush in-order to remove all type of sludge/dust precipitated on the coil without any damage to the copper cooling coil then wash the cooling with fresh water and air blower upto the satisfactory of Engr-in-Charge. Cooling coil drain water shall be clean, if any type of obstacle on the flow of water, iron body of the AHU inside and outside shall be scrap down and rub out with sand paper then apply one coat of synthetic enameld paint over a coat of primer paint shall be completed upto the satisfaction of Engnieer-in-Charge for the following AC plant :-

AHU of AC plant-50 TR capacity complete

AHU of AC plant -75/80 TR capacity complete

AHU of AC plant -35 TR capacity complete

M&L for rewinding of 3 Phase 440 V induction electric motor 3/4 KW capacity of any make and size complete with super enameled copper winding wire of existing gauge to get same capacity of motor including varnishing and replacement of insulated material including transportation charges to workshop and back complete as specified and directed by Engr-in-Charge. Note- Paint with two coat of synthetic enamel paint over a coat of red oxide primer is included in this work complete all as specified and directed.

M&L for replacement of unserviceable VFD (Variable frequency drives), 15 kW in AHU Room complete all as specified and directed .

M&L for replacement of Unserviceable Operator unit , Operating voltage AC 24 V, DC 12...40 V, Power consumption 0.7 W, 1 VA complete with new one as per existing at AHU room complete all as specified and directed

S&F in replacement 3 Pole power contactor - 40A with Add on (Auxiliary block) with auxilary contact 2NO + 2 NC complete all as specified and directed.

M&L for repair, programming and replacement of Unserviceable parts of Automation Station PXC22 in AHU Room complete all as specified and directed by Engr-in-charge. Note- This item includes all the unsv parts involved in repair of PXC22 Make-Siemens . The repair should be done by authoried dealer of Siemens and from the Siemens company.

M&L for repair, programming and replacement of Unserviceable parts of PCB of Chillar Unit/ electric pump complete all as specified and directed by Engr-in-charge. Note- This item includes all the unsv parts involved in repair of PCB . The repair should be done by authoried dealer.

M&L for replacement of Unserviceable Duct Sensor for humidity and temperature sensor unit complete with new one complete all as specified and directed.

M&L for replacement of unserviceable Seal of 3/4 KW 3 phase induction motor of Make Armstrong, Voltas, Bluestar complete all as specified and directed.

S&F MCB 415volts TP 32 amp 10KA breaking, capacity, ISI marked, complete all as specified and directed.

S&F MCB 415volts TP 63 amp 10KA breaking, capacity, ISI marked, complete all as specified and directed.

S&F in replacement of unserviceable MCCB 3 Pole, 415 V, Adjustable type, 400 Amps with breaking capacity 50 KA having thermal magnetic release complete all as specified and directed. .

S&F in replacement of unserviceable MCCB 3 Pole, 415 V, Adjustable type, 100 Amps with breaking capacity 50 KA having thermal magnetic release complete all as specified and directed. .

S&F in replacement of unserviceable MCCB 3 Pole, 415 V, Adjustable type, 800 Amps with breaking capacity 50 KA having thermal magnetic release complete all as specified and directed. .

S&F in replacement of unserviceable MCCB 3 Pole, 415 V, Adjustable type, 25 Amps with breaking capacity 10 KA having thermal magnetic release complete all as specified and directed. .

S&F in replacement of unserviceable MCCB 3 Pole, 415 V, Adjustable type, 63 Amps with breaking capacity 10 KA having thermal magnetic release complete all as specified and directed. .

S&F in replacement 3 Pole 415 V power contactor - 32 Amp (Auxiliary block) with auxilary contact 2NO + 2 NC complete all as specified and directed.

S&F in replacement 3 Pole 415 V power contactor - 18 Amp (Auxiliary block) with auxilary contact 2NO + 2 NC Mcomplete all as specified and directed.

S&F in replacement of unserviceable MCCB 4 Pole, 415 V, Adjustable type, 630 Amps with breaking capacity 50 KA having thermal magnetic release complete all as specified and directed. .

S&F in replacement of unserviceable MCCB 4 Pole, 415 V, Adjustable type, 250 Amps with breaking capacity 36 KA having thermal magnetic release complete all as specified and directed.

S&F in replacement OF Testo IOT data logger device for measuring and monitoring of Temperature and Humidity and software for IOT device for monitoring of Temperature and Humidity complete all as specified and directed.

S&F in replacement of power contactor of rating 25A Power rated 415 V AC 3, 11 KW with auxiliary contacts 1 NO + 1 NC complete all as specified and directed.

S&F in replacement of power contactor of type 40A Power rated 415 V AC 3, 18.5 KW with auxiliary contacts 1 NO + 1 NC cat Pt No complete all as specified and directed.

Supply and fix digital type industrial combined electronic temperature and humidity meter sensing the temperature and humidity from in side the user room and display on out side the AHU including wiring for sensing cable in casing and capping .

Supply and fix in replacement of us support for the pipe line for the AC plant of any capacity of Iron including angle , support, bend, etc complete all as specified and directed.

Supply, installation, testing and commissioning in replacement of unsv Butterfly Valves (manual), cast steel body stainless steel (S-316) disc, Nitrile Rubber seal & 'O' ring, PN - 1.6 working pressure for water circuit complete with all fittings, jointing materials etc of following size complete all as specified and directed.

125 mm dia

150 mm dia

80 mm dia

200 mm dia

M&L for wrapping of laminated glass cloth cover at existing EPDM insulation for duct of AC plant in between AHU and shed including coating of UV resistent paint complete all as specified and directed.

M&L for rewinding of induction electric motor, 3 phase, 440V 15/20 HP capacity of any make and size complete with super enameled copper winding wire of existing gauge including varnishing and replacement of insulated material and replacement of ball bearing including painting complete all as specified and directed Note- This item includes transportation charges from plant to workshop and back.

M&L for rewinding of induction electric motor, 3 phase, 440V 10 HP capacity of any make and size complete with super enameled copper winding wire of existing gauge including varnishing and replacement of insulated material and replacement of ball bearing including painting complete all as specified and directed. Note- This item includes transportation charges from plant to workshop and back.

M&L for rewinding of induction electric motor, 3 phase, 440V 7.5 HP capacity of any make and size complete with super enameled copper winding wire of existing gauge including varnishing and replacement of insulated material and replacement of ball bearing including painting complete all as specified and directed Note- This item includes transportation charges from plant to workshop and back..

M&L in replacement of bearing sutitable for 3/4 KW motor all as specified and directed.

M&L for replacement of Unserviceable temperature Sensor wire for compressor complete all as specified and directed .

M&L for replacement of Unserviceable element of Hot water generator 2kw complete all as specified and directed .

M&L for replacement of Unserviceable element of Solenoid coil of compressor unit of 35/50/75TR complete all as specified and directed .

S&F in replacement of unserviceable water pressure gauge dial with siphen assembly 0-100 psi and 0-7 kg per sq cm with 15/20 mm socket made of SS, adapter and cock (including welding work) complete all as specified and directed.

S&F in replacement of unserviceable water flow switch of any size with 15/20 mm socket made of SS, adapter and cock (including welding work) complete all as specified and directed.

S&F in replacement of unserviceable mercury filled thermometer for chillar water flow pipe line with MS socket (including welding work) of 15/20mm size complete all as specified and directed .

S&F in replacement of unserviceable Automatic Air Vent with MS socket (including welding work) of 15/20 mm complete all as specified and directed.

Dismantling of "C" class (heavy grade)mild steel water piping with all necessary fittings like bends, tees, reducers, flanges, supports etc complete with all fittings suitable for following sizes mild steel pipe as condenser water piping.

200 mm dia bore

150 mm dia

100 mm dia

Supply, Laying/fixing in replacement of unserviceable "C" class (heavy grade)mild steel water piping and testing of "C" class (heavy grade)mild steel water piping with all necessary fittings like bends, tees, reducers, flanges, supports etc complete with all fittings suitable for following sizes mild steel pipe as condenser water piping.

200 mm dia bore

150 mm dia

100 mm dia

S&F in replacement of unserviceable 7.5 HP Star Delta Starter comprising of following material for each starter : 3 no : 18 A TP Contactor, 1 no - O/L relay 6-10 A, 1 no - Timer , 1 no- Single Phase Preventer set of on off push buttons & indicating lights 1 no -auto Manual Switch , 1 no control fuse link

S&F in replacement 3 Pole 415 V power contactor - 65 Amp (Auxiliary block) with auxilary contact 2NO + 2 NC complete all as specified and directed.

M&L for replacement of unserviceable single phase preventer for 10 HP/15 Hp complete all as specified and directed..

M&L for replacement of unserviceable single phase preventer for 7.5 HP complete all as specified and directed. .

S&F in replacement of unserviceable C.T 400/5A complete all as specified and directed.

S&F in replacement of unserviceable C.T 600/5A complete all as specified and directed.

S&F in replacement of unserviceable Pre filter having HDPE media (AHU Filter) and filter as per the existing size 600mm X 600mm X 50 mm X 40mm , complete all as specified and directed.

M&L for replacement of u/s MS strainer of 150/200 mm dia including cutting, jointing, welding all as per site requirements, complete all as specified and directed.

M&L for Removing scale/sludge precipitated in the HWG Tank .on the heating element and pipe , circulating the descaling soulation in the pipe through the circulating pump and allows holding it for 30 minutes for chemical reaction. ensure that descaling process has been completed , circulate clean water in the pipe continue till satisfaction of Engr-in-Charge testing complete of following capacity:

Hot water generator of capacity 63 kilowatt

Hot water generator of capacity 54 kilowatt

Hot water generator of capacity 150 kilowatt

Hot water generator of capacity 250 kilowatt

Repair to ducts by taking out rusted / perished sheet and fixing new GI sheet of existing size and gauge by nuts bolts ,weldings or any means . And insulating as per existing .

M&L for providing Drain pipe GI Tubes, 'light grad', 25 mm dia from cooling coil to out of the AHU building upto 2 mtrs away from building incl making hole in wall and making good the distrab sarface to match with adjecting complete all as specified and directed by Engr-in-charge .

M&L for Taking down U/S mutilated /disturbed deck insulation from ceiling of sheds of height upto 12 meters ,Carefully

M&L for preparing the ceiling surface by scraping and cleaning and providing /fixing the fibre glass wool panels with aluminium foil , on ceiling using suitable adhesive upto height of 12 meters , making his own arrangement by using scaffolding and other T&P reqd . complete all as specified and as directed by engineer in charge.

Schedule of Credit

M/S Rohit Enterprises

P S TRADERS

Flint India

Comfort Systems