REPAIR/ MAINTENANCE OF CENTRAL AND PACKAGE TYPE AC PLANT ALONGWITH ALLIED WORKS AT AF STATION SIRSA

Amount

Material and labour for descaling of Chiller/ Condenser for compressor of capacity from 5 to 10 TR by first dismantling the chiller from line from cooling tower water line, Disconnect the water in/ out connections from the condenser or chiller. Attach the necessary hoses to the water in/ out connections on the condenser or chiller to a circulation pump and a circulating tank and circulate the descaler chemical (RX Marine/Scalefoe 100/Scalfoe 106) for 20-30 minutes, check the pH of descaler that should stay same during entire circulation process then turn the circulating pump off after pH maintained and again used cleaning with nylon steel brush and then flushing with plain alkailine water complete all as specified and as directed by Engr-in-Charge. Pump or move the spent Descaler into another container. If the Descaler still has a pH around 1-3, use the Descaler for another cleaning. After removing Descaler from the condenser or chiller, flush the condenser or chiller with water to remove all debris and remaining Dynamic Descaler. Note:- (i) Descaling chemical shall be measured and paid seperately. (ii) pH value should be maintaind as per directed by Engr-in-Charge, if pH value not showing as required, then contractor repeat the process again as directed by Engr-in-Charge. Rate quoted by the contractor shall deemed to be inclusive of the same. (iii) During descaling of condenser line, if any of copper tube will get damaged, then contractor will replaced the same wihtin quoted rate.

All as per Srl Item No. 1.00 above but of capacity from 10 to 30 TR.

All as per Srl Item No. 1.00 above but for compressor of capacity from 30 to 55 TR.

All as per Srl Item No. 1.00 above but for compressor of capacity from 55 to 90 TR.

All as per Srl Item No. 1.00 above but for compressor of capacity from 90 to104 TR.

Material and labour for descaling of cooling tower first by draining the water from cooling tower then cleaning all dirt and dust with plain water and then pouring mixture of water and descaling chemical (Scalefoe 106 or equivalent as approved by GE) in correct portions in cooling tower and circulating the mixture for 30 minutes in condenser water circuit and then draining the mixture and again cleaning the cooling tower with plain water till all chemical is removed, cleaning of all strainer, cleaning and adjustment of cooling tower fills so as to get desired draft of cooling tower for AC plant of capacity 150 to 200 TR complete all as specified and as directed by Engr-in-Charge. Note:- (i) Descaling chemical shall be measured and paid seperately. (ii) pH value should be maintaind as per directed by Engr-in-Charge, if pH value not showing as required, then contractor repeat the process again as directed by Engr-in-Charge. Rate quoted by the contractor shall deemed to be inclusive of the same. (iii) During descaling of condenser line, if any of copper tube gets damaged, then contractor shall replace the same wihtin quoted rate. (iv) Descaling of Cooling Tower shall be done before descaling of chiller as directed by Engr-in-Charge.

All as per Srl Item No. 6.00 above but of capacity 75 to 104 TR.

All as per Srl Item No. 6.00 above but of capacity 40 to 60 TR.

All as per Srl Item No. 6.00 above above but of capacity 11 TR.

Material and labour for cleaning and descaling of AHU cooling and heating coil by removing air filters, first with air blower, then with mixture of water and descaling chemical (FABKOOL Coil klin) in correct proportion with the help of pressure pump and finally washing with plain water complete all as specified and as directed by Engr-in-Charge. Note:- (i) Descaling chemical shall be measured and paid seperately. (ii) pH value should be maintaind as per directed by Engr-in-Charge, if pH value not showing as required, then contractor repeat the process again as directed by Engr-in-Charge. Rate quoted by the contractor shall deemed to be inclusive of the same. (iii) During descaling of condenser line, if any of copper tube gets damaged, then contractor shall replace the same wihtin quoted rate.

Material and labour for cleaning and descaling of Ceiling Suspended AHU cooling and heating coil by removing air filters, first with air blower, then with mixture of water and descaling chemical (FABKOOL Coil klin) in correct proportion with the help of pressure pump and finally washing with plane water also providing plastic bag so that water for cleaning AHU does not spill on floor complete all as specified and as directed by Engr-in-Charge. Note:- (i) Descaling chemical shall be measured and paid seperately. (ii) pH value should be maintaind as per directed by Engr-in-Charge, if pH value not showing as required, then contractor repeat the process again as directed by Engr-in-Charge. Rate quoted by the contractor shall deemed to be inclusive of the same. (iii) During descaling of condenser line, if any of copper tube gets damaged, then contractor shall replace the same wihtin quoted rate.

Material and labour for cleaning air filters by taking out/ down from AHU, first with vacumme cleaner/ high speed air blower and then washing the filters with running water till all dust and dirt removed and refixing after all filters are dried up complete all as specified and as directed by Engr-in-Charge. Note:- (i) Cleaning of AHU room with broom, water and wiper till no dust left before and after of cleaning of air filters included in the quoted unit rate.

Supply only descaling chemical RX Marine/ Scalefoe-100 or equivalent as approved by GE for use in descaling condenser of chillers complete all as specified and as directed by Engr-in-Charge.

Supply only descaling chemical Scalefoe-106 or equivalent as approved by GE for use in descaling of Cooling tower complete all as specified and as directed by Engr-in-Charge.

Supply only descaling chemical FABKOOL Coil klin for use in cleaning of AHU above complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of TPN MCB 32 Amps, 3 Pole, 415 Volt, 50 Hz, with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of TPN MCB 63 Amps, 3 Pole, 415 Volt, 50 Hz, with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of MCCB 63 Amps, 3 Pole, 415 Volt, 50 Hz, 16kA with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of MCCB 100 Amps, 3 Pole, 415 Volt, 50 Hz, 16kA with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of MCCB 125 Amps, 3 Pole, 415 Volt, 50 Hz, 16kA with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of MCCB 160 Amps, 3 Pole, 415 Volt, 50 Hz, 16kA with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of MCCB 160 Amps, 4 Pole, 415 Volt, 50 Hz, 16kA with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of MCCB 200 Amps, 4 Pole, 415 Volt, 50 Hz, 16kA with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of MCCB 250 Amps, 4 Pole, 415 Volt, 50 Hz, 16kA with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of MCCB 630 Amps, 4 Pole, 415 Volt, 50 Hz, 16kA with necessary connections with lugs of suitable size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of condenser water pipes of MS class ‘C’ of 80 mm dia size and material along with necessary clamps, vibration isolators and fittings such as bends, tees, reducer, union, flange etc with necessary plumbing work/ welding work but excluding strainer and gauges etc adequately supported on rigid supports including earth work complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 26.00 above but of size 100 mm dia complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of butterfly valve 80 mm dia complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 28.00 above but of size 100 mm dia complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 28.00 above but of size 150 mm dia complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of pressure switch Danfoss KP-5 complete all as specified and as directed by Engr-in-Charge.

Material and labour for cross arms, bracing, supports, clamps and back plates fabricated from structural steel section including nuts, bolts, washer, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint complete all as specified and as directed by Engr-in-Charge.

Supply, install, commissioning and testing of duct insulation in AC/ Attic space outside building with 25mm thick closed cell chemically cross linked fire retardent polyethylene foam insulation of density 30 Kg/cum. The thermal conductivity of the material should not exceed 0.0035 W/Mk at an average temp of 40 deg C, covered with aluminium faced coil complete with application with rubber based adhesive Pidilite SR 998 and 50mm x 3mm thick self adhesive tape on both longitudinal & transverse joints simultaneously including making good the damages to match the existing specification of the building, complete all as specified and directed by Engr-in-Charge.

Material and labour for design, Supply, installation, balancing, commissioning and testing of galvanised steel sheet, rectangular/ round ducting complete with neoprene rubber gaskets, elbows, splitter damper vanes, hangars, supports as per SMACNA in accordance with approved shop drawings and specifications of 20/24 gauge galvanised steel sheet thickness complete all as specified and as directed by Engr-in-Charge.

Supply and fixing of Under deck insulation of the exposed portion of the roof of the AC rooms and AHU rooms to be air conditioned with 13 mm thick closed cell chemically cross linked fire retardent polyethylene foam insulation of density 30 Kg/ Cum and covered with aluminium foil complete with application with rubber based adhesive Pidlite SR998 or equivalent all as specified. The thermal conductivity of the material should not exceed 0.0035 W/MK at an average temp of 40 deg C, including making good the damages to match with the existing specification of the building complete all as specified and directed by Engr-in-Charge.

Material and labour for removing old existing unserviceable scroll compressor and supply, erection, testing and commissioning of scroll compressor of capacity 09 to 13 TR complete all as specified and as directed by Engr-in-Charge.

Material and labour for removing old existing unserviceable condenser and supply, erection, testing and commissioning of copper tube condenser suitable for compressor of capacity 11.5/12.5/13 TR complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of thermostatic expansion valve complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of water flow switch of water line complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of HP/LP switch complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of Antifreeze switch complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of Drier core complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of Immersion type temperature sensor complete all as specified and as directed by Engr-in-Charge.

Supply and filling of refrigerant gas R-22 for 11/30/40/52 TR AC Plant complete all as specified and as directed by Engr-in-Charge. Note :- Refrigerant gas shall be brought by the contactor at site from authorized dealer/manufacturer and shall be in company's sealed cylinder and empty cylinder shall be returned to the contractor.

Supply and filling of refrigerant gas R-407 for 45/50/75 TR AC Plant complete all as specified and as directed by Engr-in-Charge. Note :- Refrigerant gas shall be brought by the contactor at site from authorized dealer/manufacturer and shall be in company's sealed cylinder and empty cylinder shall be returned to the contractor.

Material and labour for checking of leakage in chillar refrigerant line of AC Plant with the help of Nitrogen gas and repairing/blocking of leakage with copper brazing or block the leakage pipe of condensor including testing on completion to the satisfaction complete all as specified and as directed by Engr-in-Charge. Note :- (a) The unit rate quoted are inclusive of the cost of Nitrogen/ CO2 gas used for leakages test and pressure test prior to filling/ charging of gas.

Material and labour for replacement of compressor oil (non freezing) in AC plant complete all as specified and as directed by Engr-in-Charge. Note :- Compressor oil shall be brought by the contractor in sealed cans procured from the authorized dealer.

Material and labour for replacement of water pressure gauge with 'S' type stainless steel with gun metal ball valve complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of water temperature gauge complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of relief valve complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of contactor model No. 3TF46 with NO+NC of complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of contactor model No. 3TF34 with NO+NC of complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of 3 pole power contactor type MNX-9 complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of 3 pole power contactor type MNX-25/MNX-18/MNX-40 complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of 3 pole power contactor with (NO+NC) type MNX-32 complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of 3 pole power contactor with 1NO + 1NC type CHNT NC-4011 complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of front mounted add on contact block (1NO + 1NC) for contactors MNX9-80 complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of over load protector relay for 3-phase motor max range upto 63 Amp complete all as specified and as directed by Engr-in-Charge.

Material and labour for dismantling the existing unserviceable short electric motor including three phase connection from LT panel/motor, cutting the burnt winding and Rewinding of squirrel cage induction electric motor with super enameled copper winding wire using high class insulating materials and replacement of bearing as required of capacity 60 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 59.00 above but of capacity 30 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 59.00 above but of capacity 15 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 59.00 above but of capacity 7.5 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 59.00 above but of capacity 5 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 59.00 above but of capacity 3 HP complete all as specified and as directed by Engr-in-Charge.

Material and labour for dismantling the existing unserviceable centrifugal pumps from electric motor and servicing and repairing of pump with machining and welding of impellers and casing for repairing erroded portion, repairing of bearing housing, replacement of packing as required etc, re-fixing the same and testing on complition for satisfactory performances of the pumps of capacity 60 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 65.00 above but of capacity 30 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 65.00 above but of capacity 15 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 65.00 above but of capacity 7.5 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 65.00 above but of capacity 5 HP complete all as specified and as directed by Engr-in-Charge.

All as per Srl Item No. 65.00 above but of capacity 3 HP complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of fan belt for AHU blowers/Cooling tower motor etc. as per existing make (OMFA PREMIUM) and size complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of electronic timer suitable for star-delta starter complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of single phase preventor suitable for star-delta starter complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of coupling for pump motor upto capacity 30 HP complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of condensor safety valve suitable of compressor upto 13 TR complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of crank case heater for scroll compressor of capacity up to 13 TR complete all as specified and as directed by Engr-in-Charge.

Supply and fixing in replacement of FRP cooling tower body of capacity 40 TR including riser pipe of suitable size by taking down unserviceable body and fitting new one properly in position including connection of riser pipe with condenser water pipeline either with fittings or welding and sealing properly, providing anti vibration padding complete all as specified and as directed by Engr-in-Charge. Specification of cooling tower are as below : (i) Water Flow : 225 USGPM (ii) Entering Water Temp : 97°F (iii) Leaving Water Temp : 90°F

Supply and fixing in replacement of TEFC electric induction motor 3 Phase 415 Volt, 5 HP suitable for cooling tower 60 TR including motor frame and connected accessories complete all as specified and as directed by Engr-in-Charge.

Supply and fixing of TEFC electric induction motor 3 Phase 415 Volt, 7.5 HP suitable for cooling tower 150 to 200 TR including motor frame and connected accessories complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of complete PVC fills with integral louvers suitable for cooling tower 60 TR complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of cooling tower basin suitable for cooling tower of capacity 60 TR including necessary supporting frame and drain valve and accessories complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of PVC mesh for dust/ dirt prevention suitable for cooling tower of capacity 60 TR complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of water distribution system including spray nozzles suitable for cooling tower of capacity 60 TR complete all as specified and as directed by Engr-in-Charge.

Material and labour for masonary foundation with cement concrete 1:3:6 type C-2 (using 40mm graded stone aggregate) footing in second class brick work and cement mortar 1:6 for cooling tower of capacity 60 TR of Size 2.5 x 2.5 x 1 Mtr including demolishing the existing foundation complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of DOL starter suitable for 3 phase, 415 volt motor of cooling tower upto 60 TR complete all as specified and as directed by Engr-in-Charge.

Material and labour for fault finding in starter star-delta or DOL type and rectifying the fault complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of control wiring of star-delta/ DOL starter by PVC insulated copper wire 1.5 Sqmm including lugs and proper electrical connection complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of START/ STOP push button for motor starter complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of float valve with flexible rod, rubber seat and ball in position of size 25 mm to 50 mm for cooling tower complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of strip heaters of capacity up to 03 KW complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of Aluminium Cooling tower fan 4 leaf suitable for AC Plant of capacity upto 60 TR completion complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of Aluminium Cooling tower fan 6 leaf suitable for AC Plant of capacity upto 70 to 200 TR completion complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of replacement Y-strainer mesh of any type/ size complete all as specified and as directed by Engr-in-Charge.

Material and labour for repairing PCB card of water cooled scroll chiller of capacity 22TR /37.5TR/52 TR by taking out/down unserviceable card and fault finding and replace whichever part is defective i.e, diode, transistor, relay, IC, resistor, capacitor, varistor, optocoupler etc and doing proper electrical connection and testing on completion all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of HMI (Display of chiller controller) of chiller conrol panel including wiring of HMI to chiller controller complete all as specified and as directed by Engr-in-Charge.

Material and labour for cleaning water tank of cooling tower of capacity 500/1000/1500/2000 Ltr by removing mud deposited at bottom of the tank and cleaning with fresh water complete all as specified and as directed by Engr-in-Charge.

Material and labour for Repairs, Servicing and checking all safety features including, thermostat, relays, IC, fuse, resistor, capacitor etc safety valve and replace whicher part is defective of hot water generator 90 KW complete all as specified and as directed by Engr-in-Charge.

Material and labour for Repairs, Servicing and checking all safety features including, thermostat, relays, IC, fuse, resistor, capacitor etc safety valve and replace whicher part is defective of hot water generator 48 KW complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of stainless steel sprinkler with all accessories required for proper functioning of Cooling tower upto 60 TR capacity complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of stainless steel sprinkler with all accessories required for proper functioning of Cooling tower 70 to 200 TR capacity complete all as specified and as directed by Engr-in-Charge.

Material and labour for calibration and fault finding of screw/ scroll chiller control panel of any size and make and rectifying the fault with OEM/ specailized agency , any material required shall be deemed included rate of contract complete all as specified and as directed by Engr-in-Charge.

Material and labour for replacement of XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 1100 volts grade, cross-sectional area 35 sqmm 3 core complete all as specified and as directed by Engr-in-Charge.

Note for all above items :- For repair/maint of all the above items work contractor must intimate two days prior to Engr-in-Charge work without intimation shall not be counted. Decision of Engr-in-Charge will be treated as final in case of any dispute at site. (a) All the complaints to be attended by contractor on same day if the same complaint remaining unattended to next working day a penality of 2% per day shall be charged against the quoted amount. (b) The faulty items which were replaced to be produced to concern JE - in-Charge, before taking to credit, if the items not produced then a recovery of 2% shall be charged against quoted rates. (c) After completion of complaint a copy of user/occupaint signature to be obtained and deposit to concern JE.

NATIONAL CONSTRUCTION COMPANY (BID ID -3289252)

P.K ENTERPRISES (BID ID -3289528)