REPAIR AND MAINTANANCE OF AC PLANTS AT STORAGE SHEDS AT AF STATION AMLA

Amount

M&L for overhauling of compressor Capacity 15TR Make: Voltas complete all as per manufacturer's instruction by authorised dealer/workshopfor improved performance and designed parameter including the following complete all as specified and directed by Engr-in-charge. (i) Replacement of crankshaft of suitable size including dismantling transporting to authorised approved workshop and back including refixing after repair and testing. (ii) Complete dismantling of each part of compressorscleaning each part of compressor carrying out preventive work like oiling, greasing,replacing defective parts reassembling compressor complete with vacuum test and pressure test at specified pressure to detect leak and again same tests after leak repair to ensure leakage in complete system.

Supply only following parts of existing make 15TR capacity compressor complete all as specified and directed by Engr-in-charge.

Bushing with collar

Half section bearing

Rocker for unloading mechanism

Connecting rod assembly

Shaft seal assembly

Bushing for piston pin

Piston with Pin & rings

cylinder liner with Suction valve assembly

Oil pressure valve

Compressor pressure valve

Suction valve ring plate

Suction valve retaining plate

Discharge valve ring plate

Discharge valve retaining plate

Suction strainer

Oil strainer and plate

Castle nuts

Split pins

Scraper rings

Seeger rings

Cup washer

Crankshaft

Set of gasket

Set of neoprene"O' ring

Sealing ring set

Dowty ring set

Set of aluminium gasket

Suction stop valve assembly

Discharge stop valve assembly

Supply and fixing in replacement LP/HP Cut out for 3x15 TR plant all as specified and directed.

Supply and fixing in replacement LP/HP cut out for 3x35 TR plant all as specified and directed.

Supply and fixing in replacement LP/HP cut out for 3x10 TR plant all as specified and directed.

Supply and fixing in replacement LP/HP cut out for 3x12 TR plant all as specified and directed.

Supply and fixing in replacement Oil pressure cut out for 3x15 TR plant all as specified and directed.

Supply and fixing in replacement Oil pressure cut out for 3x10 TR plant all as specified and directed.

Supply and filling of new compressor oil No - 68 suitable for AC Compressor of Make -Voltas (5F40) & Kirloskar (FK-4) Make : Castrol / Servo

Supply and Fix in repairs of angle Valve, brass 1/4" for return suction line including refixing as existing at site complete all as directed. Make : Castle ( or) Equivalent

Supply and fix in repairs Shut Off valve brass 1/4" bore complete with and including replacement of flair nut , nut and bolts all as directed. Make : Castle ( or) Equivalent

Supply & Fix in repairs of condenser safety valve, brass 0 to 350 PSI sealed of any size confirming to ISI including evacuation of refrigeration gas and recharging of taken out gas all as directed by Engineer-in-charge. Make - Castle/Henry/Brassomatic

Supply and filling of new compressor oil polyster lubricant grade 160-SZ suitable for Scroll compressor of Make - Danfoss (SM185S4RC). Make : Danfoss/Emcorf (or) Equivalent

Taking down electric induction motors of following capacities after disconnecting incoming electric connection, & removing to work shop for repairs/ rewinding.Dismantling the motor, separating the parts such as rotor , stator, cleaning of all dismantled parts, taking down burnt / damaged winding cleaning the slots , packing the slots with insulated packing material, rewinding with super enameled copper winding wire of same guage varnishing the stator & drying in oven reassembling the motor complete with and including new packing material, new set of bearings, terminal plate, transporting back to plant room, material, new set of bearings, terminal plate, transporting back to plant room,

2 to 5 HP ( Condensor pump,Chillar pump, CT fan pump motor)

5 to 10 HP (for AHU)

15 to 20 HP (for Compressor Motor)

Supply & fix in repairs CT fan roller bearing of size 30204 J2/Q Make : SKF/ NRB

Supply & fix in repairs Bearing for cooling tower motor 1.5 / 2 HP Make : SKF/ NRB

Supply & fix in repairs Ball brass valves, high pressure with Polyethylene float and fly nut complete screwed for Iron pipe or brass ferrule of size 20 mm dia

M&L for opening of shell and tube water cooled condensers of both side including dismantling the water lines for inlet and outlet of condenser of AC plant.Removing scale/sludge precipitated in copper tube by push and pull method with iron rod connected with steel wire brush of suitable size as per condender tube size at the entire length of condenser that scrapping down the sludge precipitated in side the tube .Closing both side of condenser and circulating the descaling solution in all tubes of condenserof each plant through the circulatiing pump and allows holding itfor 30 mins for chemical reaction.Opening the condenser 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 to ensure that descaling process has been complete then closing the condenser at both endand circulating clean water in all tube of condenser of each plant and drain out the process will be continue till the satisficaion of EIc then fixing new gasket for both ends of condenserof plant tighten with new nut end bolt for the following size AC plant all as specified and directed..

(a) 3 x 11.5 TR capacity

(b) 3 x 12 TR capacity

(c) 3 x 15 TR capacity

(d) 3 x 10 TR capacity

Material and labour for de-scaling of chiller unit AC central type of following capacities with copper tubes by removing nuts & bolts, water connection and filling up of de-scaling acid HCL in condenser and manually cleaning of copper tubes with using nylon brush of superior quality, iron rod for removing of complete scaling from tubes and water circulation through condenser including replacement of rubber gasket, nut & bolts complete all as specified and directed

(a) 3 x 11.5 TR capacity

(b) 3 x 12 TR capacity

Taking down UNSV liquid line filter drier and Supply & fix liquid line filter drier as per existing make and specification and suitable size to fixing with existing refrigerant line for 11/12 TR capacity compressor of AC plant all as specified and directed.

Taking down UNSV liquid line filter drier and Supply & fix liquid line filter drier as per existing make and specification and suitable size to fixing with existing refrigerant line for 15TR capacity compressor of AC plant all as specified and directed.

Taking down UNSV liquid line filter drier and Supply & fix liquid line filter drier as per existing make and specification and suitable size to fixing with existing refrigerant line for 8.5TR capacity compressor of AC plant all as specified and directed.

Taking down UNSV liquid line filter drier and Supply & fix liquid line filter drier as per existing make and specification and suitable size to fixing with existing refrigerant line for 10TR capacity compressor of AC plant all as specified and directed.

Supply and fixing Heating element threaded type capacity 3KW as per sample (each row 3 heaters) proper fixing in heater box with opening , closing system of heater box complete all as specified and directed .

Supply and fixing Heating element threaded type capacity 6KW as per sample (each row 3 heaters) proper fixing in heater box with opening , closing system of heater box complete all as specified and directed .

Supply & fix in repairs dry & wet bulb thermometer mercury filled and graduated on tube including removing existing unserviceable thermometer all as directed. Make : USHA/ Dimple

supply and fixing canvas cloth for duct

Supply & fix in repairs condenser motor rating 5 HP of Make-Kirloskarshaftseal assly including taking down of old U/S.

Repair & relaying of Electrical interlocking wiring of LT panel of AC plant including all connected lux, cable, fuzes, complete all as specified and directed . NOTES :- (i) The cost of minor spares required including connector, lux, wire/cable, fuses required is deemed to be included in the quoted rate. (ii) Spares incorporated during repair of the electric panel will be measured separately under relevant item.

Push Button

KP-15 cutout Make:- Dafoss/Indfoss

Loading unloading coil

Contactors as per existing Make: L&T/ Legrand

Relay 17.5-22 Amp Make -L&T/ Siemens/ Legrand

ALV D-2 single phase preventer Make :L&T/ Minilec

MCB TPN 63 Amps, 10 KA Make -Siemens/ Legrand/ Hagger(L&T)

MCB SP 32Amps, 10 KA Make -Siemens/ Legrand/ Hagger(L&T)

Relay, 5.5 - 8.5 Amps Make -Siemens/ Legrand/ Hagger(L&T)

Relay, MN-2 10-25 Amps Make -Hagger(L&T)/ Siemens/ Legrand

Digital type Ammeter 3 phase & CT coil Make- Conzerv/Selec/ AE

ON/OFF switch Make -As per sample

Digital type Voltmeter 3 phase Make- Conzerv/Selec/ AE

Indicator (R-Y-B ), 15mm dia, Neon type Make- As per sample

MCCB 63 Amp Model DU-100 Make:- L&T/ Legrand/ Havells

ADD BLOCK suitable for existing contactor

Material and labour for charging N2 or Nitrogen Gas in 2 x 35 TR working capacity with 1 x 35 TR standby AC plant maintaining pressure 350 Psi for checking of Gas leakage and removing water vapour choked in line, flushing out the complete system including gas leakage and detection with halide torch/ soap foam solution in system including gas welding flushing and making good the pipe line to make the system leak proof complete all as specified and as directed.

All as per srl item No 30.00 here-in-before but of capacity 2 x 15 TR working with 1 x 15 TR standby.

All as per srl item No 30.00 here-in-before but of capacity 2 x 10 TR working with 1 x 10 TR standby.

All as per srl item No 30.00 here-in-before but of capacity 2 x 12 TR working with 1 x 12 TR standby.

Material and labour for vaccumising the plant by using vaccum pump upto (-) 30 PSIG pressure and hold the same under vaccum pressure upto 24 hours including necessary welding and bracing if required complete all as specified and directed for 20TR to 70 TR AC Plant.

supply and charging refrigerant gas R-22 in returnable cylinder Make - Mafron/Refron/Floron

Supply and charging refrigerant gas R-407c in returnable cylinder. Make - Mafron/Refron/Floron

Supply & fix in repairs Brass Gate valve 40 mm dia bore screwed down high pressure with crutch or butterfly handle screwed both ends for iron pipe of for union and fixed complete all as specified and directed. Make : Zoloto,Seiko or equivalent.

Supply and lay MS pipe heavy grade class C of bore 40 mm including flanges, bends, tees, nipple, socket, reducer) including taking down old U/S gate valves complete all as specified and directed Make : Jindal/ Tata/ Prakash Surya (i) Spares incorporated during repair ofpipe line will be measured separately under relevant item.

Socket 15 mm dia

Flange 40 mm dia

Bend 40 mm dia

Elbow 15 mm dia

Supply & fixin replacement mono block pump set of cap 0.6 kw (0.75 hp), 560 LPH, 9 mtr head single phase, 240 volts suitable for humidifier system including taking down old U/S mono block pump complete all as specified and directed. Make :- Vguard/Lubi/Kirloskar

Supply and fix in repairs cast iron sluice valve of size 80 mm dia bore PN-1.6 with both ends flanged confirming to the IS-780/IS-14846 with brass spindle and iron wheel head including provision of rubber gasket, nuts and bolts etc, including taking down old unserviceable sluice valve complete all as specified and directed. Make - Kirloskar/ SIR/ BIR

Supply and fix copper fuse links of temperature rating 74°C for fire damper for supply air ducting including taking down old U/S fue links Make :- complete all as specified and directed by E-in-Charge.

Supply and fix in repairs brass liquid valve of size 1/2" incl cutting, brazing and testing complete all as specfied and directed by Engr-in-Charge. Make - Brassomatic or equivalent.

Supply & fix as in repair Fan Belt as per sample and model existing at site for AHU induction motor complete all as specified and directed.

Supply & fix as in repair Fan Belt as per sample/existing at site for Compressor motor (Central AC plant) complete all as specified and directed.

Supply & fix as in repair Fan Belt as per sample/existing at site for Cooling tower motor (Central AC) complete all as specified and directed.

M&L for spray painting to central AC Plants of following capacity comprising of compressor, Motor frame & foundation, condenser all connected pipe lines in stranded colour code AHU unit panels boards & cooling tower etc with two coat of heat resistance paint of approved grade and shade including lettering and numbering after carrying out necessary preparation of surface by emery paper all as specified and directed .

3x15 TR capacity

3x10 TR capacity

3x12 TR capacity

Disconnecting, dismantling and removing central shaft of air handling units of central AC plants of any capacity and any make for repair, transporting to the work shop, opening up for repairs carry out the repairs, of shaft including re-metalling, turning, brazing and polishing work of AHU shaft of any size, cleaning, greasing and overhauling including replacement of unserviceable/worn out ball bearing and other minor spares, reassembling after repairs, bringing back to its location fixing in original position, connecting instt, and testing on full load capacity and commissioning to the entire satisfaction of Engr in charge. Note : Unit rate quoted by tenderers shall deem to incl for nuts, bolts, washers , lugs, thimbles, wires and petty items required for efficient and smooth functioning of the equipment without any extra cost to the Department.

Supply & fixing as in repair Air filter for 10000 CFM AHU unit for type Air conditioning plant micron type complete all as specified and directed.

Supply & fixing as in repair Air filter for 12000 CFM AHU unit for type Air conditioning plant micron type complete all as specified and directed.

Supply & fixing as in repair Air filter for 14000 CFM AHU unit for type Air conditioning plant micron type complete all as specified and directed.

Supply & fixing as in repair Air filter for 13000 CFM AHU unit for type Air conditioning plant micron type complete all as specified and directed.

Supply & fix in repair single phase preventer 230 Volts. Make : L&T/ Siemens/ Minilec/ Havells/ ABB/ C&S

Supply and fix in replacement solinoid coil suitable for 3x35 TR compressor complete all as specified and directed by Engr-in-Charge. Make : Alcho/ Danfoss or as per existing.

Supply and fix in replacement solenoid coil suitable for 3x15 TR compressor complete all as specified and directed Make : Alcho/ Danfoss or as per existing.

Supply and fix in replacement solenoid coil suitable for 3x10 TR compressor complete all as specified and directed. Make : Alcho/Danfoss or as per existing.

Supply and fix in replacement solenoid coil suitable for 3x12 TR compressor complete all as specified and directed . Make : Alcho/Danfoss or as per existing.

Supply & fix MNX25 type power Contactor, 3 pole, 415 V, 50Hz, with auxulary Contact 2 NO+2NC suitable for Non-Inductive or Slightly Inductive ,Resistive Load (AC1- 40 Amps rating with the existing complete all as specified.

Supply & fix MNX40 type power Contactor, 3 pole, 415 V, 50Hz, with auxulary Contact 2 NO+2NC suitable for Non-Inductive or Slightly Inductive ,Resistive Load (AC1- 40 Amps rating with the existing complete all as specified.

Supply & fix MNX70 type power Contactor, 3 pole, 415 V, 50Hz, with auxulary Contact 2 NO+2NC suitable for Non-Inductive or Slightly Inductive ,Resistive Load (AC1- 40 Amps rating with the existing complete all as specified.

Supply & fixing as in repairs MCCB 3 pole 63 Amps with breaking capacity 25 KA DU100 complete all as specified & directed.

Supply & fixing as in repairs MCCB 3 pole 100 Amps with breaking capacity 25 KA DU100 complete all as specified & directed.

Supply & fixing as in repairs MCCB 3 pole 160 Amps with breaking capacity 25 KA DU160 complete all as specified & directed.

S & F in repair chilled water sensor for AC Plants of any capacity complete all as specified and as directed.

Supply and fixing in replacement of Oil pressure gauge 100mm dia, range 0 to 200 Psi complete all as specified or as directed. Make: Fiebig/ Guru/ York

Material and labour in Replacement of water pressure gauges with adoptor (circular type) 100 mm dia with brass adoptor 15 mm 0-150 Kg/CM2 inlet only complete all as specified and directed.

Material and labour in Replacement of water pressure gauges with adoptor (circular type) 100 mm dia with brass adoptor 15 mm 0-500 Kg/CM2 inlet only complete all as specified and directed.

Material and labour in Replacement of temperature gauge circular type 100 mm dia with brass adoptor 15 mm inlet only with temp range 0 to 100 degree centigrade complete all as specified and directed.

Material and labour in replacement of temperature gauge circular type 100 mm dia with brass adoptor 15 mm inlet only with temp range 0 to 50 degree centigrade complete all as specified and directed.

Supply and fixing in replacement of DOL starter for pump set 2 to 10HP all as specified and directed.

M& for Cleaning and Servicing quarterly of nozzles & heater of cooling tower of central AC plants of any acapcity, as and when required or directed

Supply and fixing as in repairs expansion brass valve as per existing suitable for 3x35 TR capacity compressor in site with complete accessories complete all as specified and as directed.

Supply and fixing as in repairs expansion brass valve as per existing suitable for 3x15 TR capacity compressor in site with complete accessories complete all as specified and as directed.

Supply and fixing as in repairs expansion brass valve as per existing suitable for 3x12 TR capacity compressor in site with complete accessories complete all as specified and as directed.

Removing of all fine/alpha/hepa filters of AHU from their positions and laying out the filters at site for refixing after cleaning them including cleaning of AHU cooling coil using chemical with water jet/ brass brush in-order to remove all type of sludge/dust precipitated on the coil and filter without any damage to the copper cooling coil and then washing the cooling coil with fresh water and then air blowing the same to the complete satisfaction of Engr-in-Charge. Cooling coil drain water line shall be clean, if any type of obstacle is there in the flow of water, iron body of the AHU inside and outside shall be scrapped down and rubbed out with sand paper including applying one coat primer over a coat of synthetic enamel paint including part of duct portion in the AHU all to the complete satisfaction.

Taking down old unsv fins/cells of cooling tower and supply and fix PVC fins(honey comb) suitable for fiber glass cooling tower complete suitable for upto 34TR of AC plant as specified and dirtected

Material and labour for Dismantling the cooling tower of capacity 3x35 TR central AC plant installed at Shed no. 22 and draining out complete water, cleaning honey comb fins by castic soda and wire brush including cleaning the cooling tower tank and removed all algae from the basin, removing sediments from the all around cooling tower and GI pipes complete with replacement of 50mm float valve complete all as specified and directed by Engr-In-charge. Note: The cleaning shall be done twice in a month.

Charges for attending break down of AC plant of 20 TR to 72 TR capacity by only auth OEM rep / equivalent rep team for fault finding including attending repairs as and when required such as No start condition of AC plant and repairing, starting the AC plant till smooth running and setting up the alignment/required parameters of all major parts such as fan belt, compressor, gas charge, cooling tower, power contactor, starter, MCCBs, Micro processor based control panel, pumps etc as required in ground/as ordered by EIC complete all as specified and as directed. Note : The payment for the above shall be made to Contractors after submitting the original invoice only.

Note : The amount against Schedule of Credit on Page No. 38 shall be deducted from the total amount quoted against Sch 'A' while deriving lum Sum for Acceptance.

M/s Vinod Yadav