REPAIR / MAINT OF 3 X 80 TR AC PLANT AND 03x39 TR AC PLANTS AND CERTAIN ALLIED WORKS AT AF STN NAJAFGARH UNDER GE (AF) TUGHLAKABAD

Amount

Spray painting to AC plants of capacity 3x80 TR of following accessories like as compressors, AHU, condensers, pumps, motors, panels and pipes with two coat of synthetic enamel high glow paint Ist grade make Berger after preparation/cleaning of surfaces including write down the MES NO/SM NO complete 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 coil with fresh water and air blower to the entire satisfaction of Engr-in-Charge. Cooling coil drain water shall be clean, if any type obstacle is there in the flow of water, iron body of all AHU inside and outside shall be scrapped down and rubbed out with sand paper then apply one coat primer over a coat of synthetic enamel paint including part of duct portion in all AHU shall be completed upto the satisfactory of Engr-in-Charge for all AHU of EW complex AC plant capacity of 3X80 TR complete as specified and directed .

M&L for opening of condenser cover of both sides including disconnecting of water pipe line for inlet and outlet of the condenser 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 at the entire length of condenser and scraping down the sludge precipitated inside the tube. Closing both side of condenser and circulating the descaling solution in all tubes of three condenser of each plant through the circulating pump and allow to hold it for 30 minutes for chemical reaction Opening the condenser from both sides and clean with iron rod connected with nylon brush of suitable size as per condenser copper tube size at the entire length of condenser ensure that descaling process has been complete then closing the condenser at both end and circulating clean water in all the tubes of all condenser of AC plant and drain out process to continue till the satisfaction of Engr-in-Charge, then fixing new gasket for both ends of all condensers of AC plant tighten with new nut end bolt for the Ew complex AC plant 3X80 TR capacity.

M&L for blocking the punctured tubes of 80TR capacity condensers with brass pillet complete all as specified and directed

M&L for Vaccum the system and after maintaining vacuum for 24 hours supply and charging refrigerant gas HCFC 22 complete all as specified and directed.

M&L for rewinding of 3 phase induction electric motor 100 HP capacity 415 Volts 50 Hz AC supply 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 and replacement of ball bearing No. 80BC03J30X complete all as specified and directed.

M&L for rewinding of 3 phase induction electric motor 15 HP capacity 415 Volts 50 Hz AC supply 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 and replacement of ball bearing No. 6209 2Z complete all as specified and directed.

M&L for rewinding of 3 phase induction electric motor 10 HP capacity 415 volts 50 Hz AC supply 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 and replacement of ball bearing No. 6208ZZ complete all as specified and directed .

M&L for rewinding of 3 phase induction electric motor 2/3 HP capacity 415 Volts 50 Hz AC supply 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 and replacement of ball bearing No. 6206ZZ complete all as specified and directed by Engr-in-Charge.

Dismantling the inlet & outlet connection of water pipe lines, wiremesh all-around the cooling tower, PVC fins, CT fan and motor, PVC water storage tank and incoming connection of electric supply and other related items all as per site requirement complete all as specified and directed .

Cleaning the 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.

M&L for repairing of centrifugal / mono block pump 15 HP, opening the pump, replacement the defective parts of pump shaft, shaft key ways, shaft sleeves, impeller and re-fixing the same at original position, testing and commissioning complete including necessary work all as specified and directed .

M&L for repairing of centrifugal / mono block pump 10 HP, opening the pump, replacement the defective parts of pump Diffuser style casing, Bearing, Casing cover and re-fixing the same at original position, testing and commissioning complete including necessary work all as specified and directed by Engr-in-Charge.

M&L for repairing of centrifugal / mono block pump 2/3 HP, opening the pump, replacement the defective parts of pump Mechanical seal, Gland pusher, Stuffing Box bosh, Bearing housing and re-fixing the same at original position, testing and commissioning complete including necessary work all as specified and directed .

Supply and filling in replacement of compressor oil non freezing type N-68 complete all as specified and directed .

S&F in replacement of Expansion valve suitable for 80 TR capacity of AC plants as per sample complete all as specified and directed .

S&F in replacement of Alpha filter of size 600 X 400 mm and pressure drop (Pa) MIN 80-130 and MAX 160-250 in AHU of capacity 80 TR AC plants as per sample complete all as specified and directed .

S&F in replacement and testing complete of PCB card, Model No. MCPWCSD080-V2 for 80 TR capacity of AC plants all as per sample complete all as specified and directed .

Dismantling and taking down old, unserviceable, unbalanced fan blade with unserviceable broken sprinkler for replaced from top of cooling tower of capacity 3 x 80 TR complete all as specified and directed .

S & F in replacement of sprinkler of size 5'' dia and necessary fittings on cooling tower of 80 TR AC plant complete all as specified and directed .

S&F in replacement of fan assembly including fan blade with alignment for 3 X 80 TR complete all as specified and directed .

Dismantling and taking down old, unserviceable PVC eliminator and PVC fins (honey comb) from cooling tower of capacity 3x 80 TR complete all as as specified and directed .

Dismantling and taking down old, unserviceable PVC eliminator and PVC fins (honey comb) from cooling tower of capacity 3 X 39 TR complete all as as specified and directed.

M&L in replacement of PVC eliminator from cooling tower of capacity 3 x 80 TR complete all as specified and directed .

M&L in replacement of PVC eliminator from cooling tower of capacity 3 X 39 TR complete all as specified and directed .

M&L in replacement of PVC fins (honey comb) from cooling tower of capacity 3x80 TR complete all as specified and directed .

M&L in replacement of PVC fins (honey comb) from cooling tower of capacity 3X39 TR complete all as specified and directed .

S&F in replacement of digital Ammeter square flush (0-400 A) & CT ratio 400/5 Amps with CT's and Rotary switch including necessary addition/ alternation of panel including cutting/welding of front side of panel board /feeder to match the existing panel board/feeder taking out of unserviceable one (L&T) / AE complete all as specified and directed

S&F in replacement of 150 mm butterfly valve IS 13095 Short pattern PN 1.6 Class-125 duly lSI marked EPDM rubber lining seal, stainless steel disc including changing holding coil etc complete all as specified and directed

S&F in replacement of 100 mm butterfly valve IS 13095 Short pattern PN 1.6 Class-125 duly lSI marked EPDM rubber lining seal, stainless steel disc including changing holding coil etc complete all as specified and directed

S&F in replacement of 80 mm butterfly valve IS 13095 Short pattern PN 1.6 Class-125 duly lSI marked EPDM rubber lining seal, stainless steel disc including changing holding coil etc complete all as specified and directed

S&F in replacement of sluice valve of size 150 mm dia flanged of class 1.6 PN having brass/SS spindle with check nut and iron wheel on top of the valve with duly ISI marked tested complete all as specified and directed .

S&F in replacement of sluice valve of size 100 mm dia flanged of class 1.6 PN having brass/SS spindle with check nut and iron wheel on top of the valve with duly ISI marked tested complete all as specified and directed .

S&F in replacement of sluice valve of size 80 mm dia flanged of class 1.6 PN having brass/SS spindle with check nut and iron wheel on top of the valve with duly ISI marked tested complete all as specified and directed .

S&F in replacement Stop valves 20mm dia, cast copper alloy, screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions and fixed complete all as specified and directed .

S & F in replacement gun metal globe or gate valves of size 40 mm dia, with iron wheel head, screwed both ends for iron pipe and fixed complete all as specified and directed .

Supply and fixing in replacement of MCCB 200 Amps 4 Pole breaking capacity 36 KA, 415 Volts, 50 Hz Electro mechanical, adjustable thermal and adjustable magnetic tripping including necessary fitting arrangement and testing complete all as specified and directed.

Supply and fixing in replacement of MCCB 250 Amps 4 Pole breaking capacity 36 KA, 415 Volts, 50 Hz Electro mechanical, adjustable thermal and adjustable magnetic tripping including necessary fitting arrangement and testing complete all as specified and directed.

Supply and fixing in replacement of MCCB 400 Amps 4 Pole breaking capacity 36 KA, 415 Volts, 50 Hz Electro mechanical, adjustable thermal and adjustable magnetic tripping including necessary fitting arrangement and testing complete all as specified and directed.

Supply and fixing in replacement of MCCB 630 Amps 4 Pole breaking capacity 36 KA, 415 Volts, 50 Hz Electro mechanical, adjustable thermal and adjustable magnetic tripping including necessary fitting arrangement and testing complete all as specified and directed.

Pressure testing for entire system of the following AC plant of all three set of condenser, compressor and circulating system with CO2/Nitrogen gas and retain to allow the pressure for three days. If any leakage in found or reduction in the scale of pressure shall be located and arrest the leakage immediately by soldering or an appropriate measure are to be taken to stop the leakage permanently for the EW complex AC plant 3X80TR capacity complete all as pecified and directed .

Dismantling the AHU of capacity 80 TR plant of front filter side removing the coil assembly and filters from AHU and setting aside for re-use and replacement of the base of AHU with angle iron 50x50x6mm and using a MS sheet 16 SWG including addition/alteration, welding and fixing the coil assembly at the same complete testing all as specified and directed .

Supply and replacement in repair under mentioned spare parts for AC plants for maintenance and repair to compressor of 100 HP capacity and make Voltas complete all as pecified and directed .

Connecting rod

Cylinder liner

Piston

Piston ring

Gudgeon pin

Suction plates

Suction read and discharge read

Oil pump

Loader assembly

Gasket sets complete

Tyre coupling with lock

Oil filter

Spring suction

Spring ducting

Oil seal

Main bearing

S&F in replacement of power contactor rated current 60 Amp 4 pole, 415 volt with AC coil having pole contact composition for 4 NO (2NC+2NO), complete all as specified and directed .

S&F in replacement of Power contactor 600 Amp 4pole rated 415 V AC 1, with auxiliary contacts 2 NO + 2 NC, complete all as specified and directed .

S&F in replacement contactor 3TF49 of 85 amps complete all as specified and directed .

S&F in replacement of power contactor 40 Amp 3 pole, 415V complete with auxiliary contacts 2NO+ 2NC all as specified and directed.

S&F in replacement of power contactor 95 Amp, 415 V AC 3, with auxiliary contacts 2 NO + 2 NC, complete all as specified and directed .

S&F in replacement of power contactor 110 Amp 3 pole, 415V complete with auxiliary contacts 2NO+ 2NC all as specified and directed.

M&L for Earthing complete with galvanised steel earth plate electrode 600 × 600 × 6 mm thick, buried directly in ground (in vertical position) earth pit not less than 2.25 mtr below ground level with the top edge of the earth plate npt less than 1.5 mtr below ground level and connected to galvanized iron earth srip 32 X 6 mm by means of nuts, bolts, check nuts and washers of galvanized iron including PCC 1:2:3 type B1 precast RCC cover slab 50mm thick with 8mm dia TMT bar 100mm c/c both ways with suitable handle made of 12 mm round bar including necessary excavation & earth work in any type of soil, 20 mm dia medium grade galvanized steel tube for watering with one end fixed cast iron funnel and wire mesh, 40 mm dia bore, light grade galvanized steel tubing upto 7.5 mtr length for drawing earth lead wire protection common salt, charcoal etc complete all as shown in electrical plate No. 3 of SSR Part-1 and connected to earthing test point all as specified or indicated including testing on completion, complete all as specified and directed . Note:- Aluminum strip and protection pipe of 40 mm dia upto 7.5 meter length is deemed included in the rate quoted.

M&L for replacemnt of earth continuity conductor or galvanized iron main earthing lead fixed to wall or bottom on porcelain insulator or recess on chases or buried in ground or drawn in conduit/pipe size 32 mm x 4 mm strip all as specified and directed .

S&F in replacement of porcelain insulator of size 25 X 6 mm on angle iron frame of 30 X 3 mm for mounting of strip heater all as required, complete all as specified and directed.

Detecting the fault of LT panel board of AC plants of in EW complex & Eagle complex by providing skilled tradesman & helper with necessary safety and working equipment such as multimeter, speedometer and other required tools and rectified the defects including replacement of copper wiring of existing size cable and testing of interlocking system complete all as specified and directed . Note : If the contractor fail / delay to rectify and replacement of defective parts in time, they should be pay fine @ 1% per day of quoted rate.

M&L for in replacement of duct insulation 50 mm thick with resin bonded fibre glass wool roll of density 24 Kg/Cum, with factory laminated aluminium vapour barrier, thickness of insulation as specified and including the following:- (a) M&L for cleaning the duct surface (to be insulated) by scrapping carefully with wire brush etc to make the surface completely free of millscale, dirt, fust, grease and the foreign materials, taking special care so that all duct joint are sealed against any leakage. (b) M&L for applying rubber based adhesive CPRX compound. (c) M&L for sealing of all longitudinal joints and circular overlaps with and including aluminium foil tape 50mm wide to make the insulation leak proof. (d) M&L for securing the insulation with and including mechanically fastened nyln/steel straps of size 12mm/50mm at maximum intervals of 1.2 mtr complete all as specified and directed by Engr-in-charge.

S&F in replacement of single phase preventer 230 Volts as per sample complete all as specified and directed .

S&F in replacement of Solenoid valve 1/4''dia 240 volt as per sample complete all as specified and directed .

S&F in repalement of VOL-AC-WC-80-320 type sensor for chiller plant 240 Volts as per sample complete all as specified and directed .

S&F in repalement of water temp pressure gauge 0-150 PSI 6'' dia as per sample complete all as specified and directed .

S&F in repalement of water temp pressure gauge 0-150 PSI 3'' dia as per sample complete all as specified and directed by Engr-in-charge.

S&F in replacemnet of water pressure gauge 0-150 PSI 4'' dia with siphon and ball valve as per sample complete all as specified and directed by Engr-in-charge.

S&F in replacement of HRC fuse 200 Amp as per sample complete all as specified and directed.

S&F in replacement of electrici strip type heater 3 kW as per sample complete all as specified and directed .

S&F in replacement of MCB TPN 63 Amp 240 volts 10KA 'C' curve complete all as specified and directed .

S&F in replacement of MCB SPN 32 Amp 240 volts 10KA 'C' curve complete all as specified and directed .

Spray painting to AC plants of capacity 3 X 39 TR of following accessories like as compressors, AHU, condensers, pumps, motors, panels and pipes with one coat of synthetic enamel high glow paint Ist grade after preparation/cleaning of surfaces including write down the MES NO/SM NO complete as specified and directed.

M&L for checking the leakage by vacuum plant for 24 hrs in both low and high side of the system by feeding dry nitrogen to maintain adequate pressure in the system, plugging the leaks by providing of Teflon tape, sealing of all refrigerant line valves like liquid lines valves/suction/ discharge valves of compressors, gland packing of all angle valves flaring of all AC plant of capacity 3 X 39 TR complete 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 coil with fresh water and air blower to the entire satisfaction of Engr-in-Charge. Cooling coil drain water shall be clean, if any type obstacle is there in the flow of water, iron body of all AHU inside and outside shall be scrapped down and rubbed out with sand paper then apply one coat primer over a coat of synthetic enamel paint including part of duct portion in all AHU shall be completed upto the satisfactory of Engr-in-Charge for all AHU of Eagle complex AC plant capacity of 3X39 TR complete as specified and directed .

M&L for opening of condenser cover of both sides including disconnecting of water pipe line for inlet and outlet of the condenser 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 at the entire length of condenser and scraping down the sludge precipitated inside the tube. Closing both side of condenser and circulating the descaling solution in all tubes of three condenser of each plant through the circulating pump and allow to hold it for 30 minutes for chemical reaction Opening the condenser from both sides and clean with iron rod connected with nylon brush of suitable size as per condenser copper tube size at the entire length of condenser ensure that descaling process has been complete then closing the condenser at both end and circulating clean water in all the tubes of three condenser of each plant and drain out process to continue till the satisfaction of Engr-in-Charge, then fixing new gasket for both ends of the three condensers of each plant tighten with new nut end bolt for the Ew complex AC plant 3X39 TR capacity.

M&L for blocking the punctured tubes of 39 TR capacity condensers with brass pillet complete all as specified and directed .

M&L for Vaccum the system and after maintaining vacuum for 24 hours supply and charging refrigerant gas HFC R 407C complete all as specified and directed .

M&L for rewinding of 3 phase induction electric motor 30 HP capacity 415 Volts 50 Hz, AC supply 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 and replacement of ball bearing No. 6310 2Z complete all as specified and directed .

M&L for rewinding of 3 phase induction electric motor 7.5 HP capacity 415 Volts 50 Hz, AC supply 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 and replacement of ball bearing No. 6205ZZ complete all as specified and directed .

M&L for rewinding of 3 phase induction electric motor 3 HP capacity 415 50 Hz, AC supply Volts 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 and replacement of ball bearing No. 6206ZZ complete all as specified and directed .

M&L for repairing of centrifugal / mono block pump 7.5 HP, opening the pump, replacement the defective parts of pump impeller, sealing arrangements, pump gasket, shaft sleeves and re-fixing the same at original position, testing and commissioning complete including necessary work all as specified and directed .

M&L for repairing of centrifugal / mono block pump 3 HP, opening the pump, replacement the defective parts of pump mechanical seal, casing cover, impeller, pump gasket, shaft and re-fixing the same at original position, testing and commissioning complete including necessary work all as specified and directed

S&F in replacement of Expansion valve suitable for 39 TR capacity of AC plants as per sample complete all as specified and directed .

S&F in replacement and testing complete of PCB card, Model No. MCPWCSD039-V4 for 39 TR capacity of AC plants all as per sample complete all as specified and directed .

Dismantling and taking down old, unserviceable, unbalanced fan blade with unserviceable broken sprinkler for replaced from top of cooling tower of capacity 3 x 39 TR complete all as specified and directed .

S & F in replacement of sprinkler of size 3'' dia and necessary fittings on cooling tower of 80 TR AC plant complete all as specified and directed .

S&F in replacement of Alpha filter of size 600 X 500 mm and pressure drop (Pa) MIN 35-60 and MAX 70-120 in AHU of capacity 39 TR AC plants as per sample complete all as specified and directed.

S&F in replacement of fan assembly including fan blade with alignment for 3 X 39 TR as per sample complete all as specified and directed.

Schedule of Credit

A B K Enterprises

M/s Prakash Enterprises