REPAIR AND IMPROVEMENT OF CERTAIN AC PLANT ROOMS AND SERVICING REPAIRS OF UNSERVICEABLE SPARES OF 60 TR TO 120 TR CENTRAL TYPE AND OTHER CONNECTED WORKS OF AC PLANTS AT NAVAL DOCKYARD, VISAKHAPATNAM UNDER GE (I) DM VISAKHAPATNAM.

Amount

Preventive maintenance of central type AC plant by carrying out routine check of the Plant complete for smooth functioning all as per manufacturer's instructions and as directed for 39.0 TR x 03 Nos installed at SMU 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 responsibility to 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.

(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

(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

Note :- The above quoted rate is inclusive of all 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

All as per item No. 1.00 above, but for 39 Tr x 3 Nos. at MI room

All as per item No. 1.00 above, but for 39 Tr x 3 Nos. at Auditorium room

All as per item No. 1.00 above, but for 50 Tr x 3 Nos. at Electrical dept

All as per item No. 1.00 above, but for 50 Tr x 2 Nos. at Periscope bay

All as per item No. 1.00 above, but for 50 Tr x 3 Nos. at Load Test bay

All as per item No. 1.00 above, but for 120 Tr x 4 Nos. at 25A bldg

All as per item No. 1.00 above, but for 60 Tr x 3 Nos. at 25D bldg

All as per item No. 1.00 above, but for 100 Tr x 3 Nos. at 25E bldg

All as per item No. 1.00 above, but for 75 Tr x 2 Nos. at 25E bldg

Repairs, overhauling and servicing of AC Plant compressor between 50 tr by stripping out both end covers, cylinder head, cylinders, connecting rod, crank shaft, oil pump, side covers, bush bearings etc.,and refrigerant taking the cylinder for reuse/replacement (if available) of unserviceable worn out parts in the compressor, leak testing with CO2 gas under constant pressure of 250 PSI after complete transfer of refrigerant gas from the entire system, rectification of leakages including cutting and brazing the refrigeration pipes wherever required, , teflon washers of valves, copper tubing, flare nuts etc., neutralizing after the pressure hold good for at least 24 hours vacuumization of system, testing and commissioning of air conditioning plants,cleaning the system with CO2/Nitrogen gas for leak detection for minimum 24 Hrs, after flushing out the system, vacuumization and charging with refrigerant gas & compressor oil

and testing the unit on no load and full load conditions all as specified and directed.The rate quoted is inclusive of repair/replacement of spare parts such as sensors,Bushing with collar standard,Shaft seal assembly,Bearing bushing,Gear Wheel,Single frame (unload -65),Rocker for unload mechanism,Bearing cup,Spring holder and spring,Cup washer,Crank shaft,Half section of bearing standard , Bush for piston pin,Castie nut,Split pin,pulley and pulley belt,piston with pin & rings,Cylinder liner ,Unloading ring with pin,Tension spiral,Suction valve ring plate,Valve spring,Suction valve retaining plate,Discharge valve seat,Discharge valve ring plate,Oil pressure regulating valve,Safety valve assembly,Set of gasket,Set of neoprene “O” Ring,Set of dowty rings,Set of sealing rings,Crank shaft,Connecting rod,Piston,Piston pin,Piston lock,Suction reed,Suction valve springs,Discharge valve

springs,Discharge valve assembly,Valve plate,Spring lifter pin,Gasket set,bearings,Oil pump,Thrust washer,Shaft seal assembly with bush,Piston ring and oil ring,Cylinder line and replacement of suction reeds, discharge reeds, piston rings , oil rings and replacement of gaskets etc and any other items to make the unit functional.complete all as specified and directed. Note:- Supply only refrigerant gas, compressor oil for the compressors will be measured and paid under relevant items of Schedule ’A’ and rest of the spare parts required to make the unit functional is deemed to be inclusive of quoted rate.

All as per item No. 11.00 above, but AC plant compressor between upto 30 TR

All as per item No. 11.00 above, but AC plant compressor between upto 100 - 120 TR

All as per item No. 11.00 above, but AC plant compressor between upto 75 TR

Supply only R-407 c gas

Material and labour for descaling the following condensers by using HCL acid with continuous circulation method using circulation pump, finally neutralizing with fresh water, opening both end covers of shell and tube condensers, cleaning of copper tubes manually by using nylon brushes, re-fixing the end covers with new neoprene rubber gaskets, commissioning after complete performance test of the system all as specified and directed. (a) Upto 50 TR

De-carbonizing/cleaning of LT 415/380 V, 3 phase bus bar, bus bar chambers of LT panels electrical 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, thimbles duly 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

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 responsibility to 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.

Supply only MCCB of 250 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make :- Indo Asian/Havells/L&T

Supply only MCCB of 160 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make :- Indo Asian/Havells/L&T

Supply only MCCB of 100 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make :- Indo Asian/Havells/L&T

Supply only MCCB upto 63 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make :- Indo Asian/Havells/L&T

Supply only Power contactor 32 Amps, 3 pole, 415 V complete all as specified and directed. Make :- Indo Asian/Havells/L&T /ABB/Schneider

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 Make :- RPG or equivalent as approved by GE.

Supply only 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.

Material and labour for monthly cleaning of entire indoor substation buildings inside wall, ceiling, floor and outside wall, plinth protection with suitable brush/broom/wiper, removing wild vegitation around substation building complete all as sjpecified and directed.

M&L for Earthing complete with copper plate 60×60cm x 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 to 20×3mm 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.

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.

Supply only R-22 gas. Make:-Refron 22/Floron 22/Mafron 22

Supply only R-134 A gas. Make:-Refron/Floron/Mafron

Supply only compressor oil. Make:-Servo/N-68

Supply only compressor oil. Make :- BSE -170

Material and labour for taking out the defective pressure cut-outs of any range and model and supply & fix new pressure cut-outs, connecting the pressure lines/control wiring, leak testing and commissioning all as specified and directed Make:-Indofoss/Danfoss/Ranco a) HP/LP pressure cut-out MP-15

(b) Water pressure cut-out IPS-70

(c) Oil pressure cut-out MP-55

S&F for VVE-70 model expansion valve of Sporlon make with necessary modification, brazing, lead testing and commissioning including taking out old unsv expansion valve complete all as specified and directed.

All as per item No. 35.00 above, but for VVE- 52

Supply and fix in repairs pilot solenoid valve, 220V to the refrigerant system, reconnecting the refrigeration piping including leak testing, brazing to the pipe line, necessary copper tubing etc., wherever required all as specified and directed. Make :- Sporlon/Donfos

All as per item No.37.00 above, but 110V

Supply and fix pressure gauge for suction/discharge refrigerant lines and water lines of square/round type 2"/4" dial of following ranges for Package/Central type AC plants including taking down old unserviceable pressure gauge complete all as specified directed Make -Air Master/Febig/Scientific (a) 0-150 PSI for refrigerant line

(b) 0-300 PSI for refrigerant line

(c) 0-12 Kg./cm2 for water line

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