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| 1 | Preventive maintenance of package type AC plant by carrying out routinecheck of the Plant complete for smooth functioning all as per manufacturer\"s instructions and as directedfor 8.0 TR x 03 Nos installed at Telephone exchange bldg including attending to under mentioned jobs to ensure its satisfactory performance:-Note: Quoted Rates are deemed to be for carrying out checks as under :-(i)Contractor has to deploy manpower at the worksite to attend the breakdown calls received from representatives during two shifts throughout the week including sundays & holidays and on emergencies in third shift shall be attended,preventive maintenance for the entire duration of contract.It is the contractors responsibilityto make the unit functional and sufficient stock of spares shall be maintained to rectify the breakdown within scheduled period. Cleaning, stacking,sorting,handling and upkeeping of maintenance shall be carried out by contractor.(ii)Checking the system for visual leaks at all flare fittings and arresting. |
| 2 | (iii)Carrying out leak test with soap solution in case reports indicate frequent loss/recharging of refrigerant into the system whenever required (iv)Checking operation ,suction& discharge pressures.In case of any abnormality identifying and correcting the same(v)checking and setting of safety controls such as HP/LP cutouts,overload protections and thermostats etc.(vi)Cleaning of pre air filters and replacing the same if necessary(vii)Checking lubricating oil level at the sight glass if found below the normal level the problem shall be analyzed and rectified.(viii)Running of standby unit and observe for satisfactory performance.(ix)Checking the incoming voltage and running currents and take appropriate measures.(x)checking for any abnormal noise/vibration from moving parts such as compressors,motors,fans etc in case of any abnormality,investigating and correcting the same(x)checking and rectifying any water leaks and arresting them |
| 3 | (xi)Checking the operation of controls and making them functional(xii)Checking and cleaning of fan,runner blades and replace if required (xiii)Cleaning cooling coils by cleaning agent (CFC free)(xiv)Checking the cooling tower water level(xv)Checking the water level in the makeup water tank.(xvi)Starting and checking the running condition of cooling tower fan(xvii)Starting the pump and checking the running condition including checking the NRVs and arresting the leaks(xviii)Cleaning condensate drain tray(xix)Checking the cooling tower nozzles for proper spray and replacing the same if necessary.(xx) Descaling the condenser and replacing the condenser end shield gaskets(xxi)Record of these shall be maintained and submitted monthly to engineer in charge |
| 4 | Note :-The above quoted rate is inclusive ofall spare parts apart from below mentioned spare parts which will be paid seperately to make the unit completely functional, T&P manpower required in the site |
| 5 | All as per item No. 1.00 above,but for 5.00 TRx 2 Nos at Periscope baybldg |
| 6 | All as per item No. 1.00 above,but for 7.5 TRx 4 Nos at 29 Test house bldg |
| 7 | All as per item No. 1.00 above,but for 8.0 TR x 3 Nos. at 43 bldg |
| 8 | All as per item No. 1.00 above,but for 11.0 TR x 2 Nos. at MIS bldg |
| 9 | All as per item No. 1.00 above,but for 11.0 TR x 2 Nos. at 17 DGM bldg |
| 10 | All as per item No. 1.00 above,but for 11.0 TR x 2 Nos. at 17 lp bldg |
| 11 | All as per item No. 1.00 above,but for 11.0 TR x 3 Nos. at 17 RJEbldg |
| 12 | All as per item No. 1.00 above,but for 16.5 TR x 2 Nos. at 42 Library |
| 13 | All as per item No. 1.00 above,but for 16.5 TRx 2 Nos. at MIT bldg |
| 14 | Material and labour for de-scaling the condensers of 5 to 16.5 TR package AC units by using HCL acid agent with continuous circulation method using circulation pump, finally neutralizing with fresh water, opening both ends covers of shell and tube condenser, cleaning of copper tubes manually by using nylon brushes, re-fixing the end coverwith new ‘Neoprene make’ rubber gaskets, nuts,bolts etc., and commissioning after conducting performance test of the system all as specified and directed Note:-Descalling of all the units at one location is considered as one job |
| 15 | M&L for for repair/overhauling the IDU of AC unit whichincludes removal of outer body, compressor, condenser,cooling/evaparator coil,transducers, fan motor anddisconnecting all electrical connections, refrigerant lines, condenser water pipe lines etc and removing gas keeping into safe custody for reuse or for schedule of credit. Reassembling/replacing the unit byall the spares which are taken into custody/supply onlyand connecting the pressure lines/control wiring, leak testing recharging the gas ,correcting alignment of fan motor, tightening of loose nuts, bolts,connecting wires etc.,complete all as specified and directed.Note : The quoted Rates are inclusive of reinstalling testing and commissioningthe unit as earlier with necessary modification to refrigerant copper pipe line with silver brazing replacement of shut off valves flushing out the system which requires pressure testing with nitrogen gas under constant pressure of 250 PSI for 24 hours, vaccumization, performance test and commissioning and charging the gas to unitmaking alignment gas charging and necessary tinkering/brazing and making the unit completely functional etc. |
| 16 | supply only new sealed scroll compressor suitable upto 16.5 TR water cooled package units complete all as specified and directed |
| 17 | Supply onlyMicroprocessor control board suitable upto 16.5 TR package unit complete all as specified and directed. Make : Bluestar/Voltas |
| 18 | Supply only suction gas temperature tranduger (LP)suitable upto16.5 TR ductable AC plant complete all as specified and directed. |
| 19 | Supply only suction gas temperature tranduger (HP)suitable upto 16.5 TR ductable AC plantcomplete all as specified and directed. |
| 20 | Supply only supply/return air temperature sensorsuitable upto 16.5 TR ductable AC plant complete all as specified and directed. |
| 21 | Supply only water flow switchsuitable upto 16.5 TR package type AC plant complete all as specified and directed. |
| 22 | Supply only evaporator coilsuitable upto 16.5 TR package type AC plant complete all as specified and directed. |
| 23 | Supply onlythermostatic type expansion valve suitable upto 16.5 ton package unit complete all as specified and directed. |
| 24 | Supply only V-Belt of existing section of any sizesuitable upto 16.5 TR all as specified and directed. |
| 25 | Supply only new HP/LP pressure cut-out MP-15all as specified and directed |
| 26 | Supply only new Water pressure cut-out IPS-70 all as specified and directed |
| 27 | Supply onlynew condensor shell and tube type having shell size pressure 21 Kg/sq cm and tube side 7 kg/ sq suitable upto 16.5 TR complete all as specified and directed. |
| 28 | Supply onlysuction valve suitable upto 16.5 T package unitsall as specified and directed. |
| 29 | Supply only discharge valvesuitable upto 16.5 T package units all as specified and directed. |
| 30 | Supply only PVC mesh Air filters with MS frame suitable upto 16.5 T package AC plants including taking out old unserviceable filter all as specified and directed. |
| 31 | Supply only filter drier from package type AC unit suitable upto 16.5 TRall as specified and directed |
| 32 | Supply onlyR-22 gas all as specified and directed. |
| 33 | Supply onlyR-407 gas all as specified and directed. |
| 34 | Material and labour for cleaning of evaporator coil with caustic soda neutralising with fresh water blowing with electric blower for package type AC unit and replacement of canvas cloth with Zip arrangement for jointing the duct as required at site, all as specified and directed. |
| 35 | De-carbonizing/cleaning of LT 415/380 V, 3 phase bus bar, bus bar chambers of LT panelselectrical connections complete, LT ACB, MCCB,MCB,switch fuse unit arrangement,in-coming and out-going installed in plant room and cleaning the bus bar with CTC, applying, Backtol (red) solution to the bus bar insulators,checking all the connections,tightening the nuts, bolts, thimblesduly applied with petroleum jelly to nuts, bolts and thimbles of in-coming and out-going system complete including replacement of defective rusted bolts , nuts and spring washers with new cadmium coated ones all as specified and directed. |
| 36 | Note :- Items apart from supply only which are required in site are deemed to be included in the quoted rate.Material such as indication lamp, ammeter, voltmeter will be measured and paid separately as supply only.Any other items equired to make the unit functional is deemed to be included in the quoted rate.Contractor has to deploy manpower at the worksite to attend the breakdown calls received from representatives during two shifts throughout the week including sundays & holidays and on emergencies in third shift shall be attended,preventive maintenance for the entire duration of contract.It is the contractors responsibilityto make the unit functional and sufficient stock of spares shall be maintained to rectify the breakdown within scheduled period.Cleaning,stacking,sorting,handling and upkeeping of maintenance shall be carried out by contractor. |
| 37 | Supply only MCCB of 250 Amps, 4 pole, 36 KA, AC supply50Hz, 415 V complete all as specified and directed. |
| 38 | Supplyonly MCCB of 160 Amps, 4 pole, 36 KA, AC supply50Hz, 415 V complete all as specified and directed. |
| 39 | Supplyonly MCCB of 100 Amps, 4 pole, 36 KA, AC supply50Hz, 415 V complete all as specified and directed. |
| 40 | Supply onlyMCCB upto 63 Amps, 4 pole, 36 KA, AC supply50Hz, 415 V complete all as specified and directed. |
| 41 | Supply onlyPower contactor 32 Amps, 3 pole, 415 V complete all as specified and directed. |
| 42 | Supply and fix rubber insulating mat in front of LT panel board of size 3 mm thick, 1 M width up tp 3.3 KV all as specified and directed. |
| 43 | Supply only digital electronic Ammeter (0-100 amps range)withbuilt in selector switch suitable for LT 415 V panel flush pattern square type 96 mm x 96 mm with adopter completeall as specified and directed. |
| 44 | Supply onlydigital electronic Volt meter (0-500 volts range) withbuilt in selector switch suitable for LT 415 V panel flush pattern square type 96 mm x 96 mm with adopter completeall as specified and directed |
| 45 | Supplyonly indication lamps (LED type) red, yellow and blue in colours of 22.5 mm dia to monitor on LT panel board suitable for 240 V AC supply and taking down unserviceable indication lamps all as specified and directed. |
| 46 | Supply and fix pressure gauge 0-12 Kg./cm2for water line for suction/discharge refrigerant lines and water lines of square/round type 2\"/4\" dial for Package AC plant including taking down old unserviceable pressure gauge complete all as specified directed |
| 47 | Earthing complete with copper plate 60×60cm ×3.15mm thick electrode and 20×3mm copper strip as earthing lead, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less\"than 1.5 metres below normal ground level, connected to20×3mm copper strip by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 3 connected to earthing test point all as specified or indicated including testing on completion complete all as specified and directed. |
| 48 | Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 20 x 3mm copper strip complete all as specified and directed. |
