COMPREHENSIVE MAINTENANCE OF CENTRAL TYPE AC PLANTS UPTO 30TR AND IMPROVEMENT REPAIR REPLACEMENT OF UNSV SPARE PARTS AND ALLIED WORKS 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 15.0Tr *03 nos installed at 20 MOUT 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. (a)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. (b)checking the system for visual leaks at all flare fittings and arresting (c)carrying out leak test with soap solution in case reports indicate frequent loss/recharging of refrigerant into the system whenever required (d)checking operation ,suction& discharge pressures.In case of any abnormality identifying and correcting the same (e)checking and setting of safety controls such as HP/LP cutouts,overload protections and thermostats etc. (f)cleaning of pre air filters and replacing the same if necessary (g)checking lubricating oil level at the sight glass if found below the normal level the problem shall be analyzed and rectified.

(h)Running of standby unit and observe for satisfactory performance. (i)checking the incoming voltage and running currents and take appropriate measures (j)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 (k)checking and rectifying any water leaks and arresting them (l)checking the operation of controls and making them functional (m)checking and cleaning of fan,runner blades and replace if required (n)cleaning cooling coils by cleaning agent (CFC free) (o)checking the cooling tower water level (p)checking the water level in the makeup water tank

(q)starting and checking the running condition of cooling tower fan (r)starting the pump and checking the running condition including checking the NRVs (s)cleaning condensate drain tray (t)checking the cooling tower nozzles for proper spray and replacing the same if necessary u)Descaling the condenser and replacing the condenser end shield gaskets Record of these shall be maintained and submitted monthly to engineer in charge 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 25 Tr x 3 Nos. at 43 central bldg

All as per item No. 1.00 above, but for 20 Tr x 2 Nos. at 15 bldg

All as per item No. 1.00 above, but for 11 Tr x 2 Nos. at 17 bldg

Repairs, overhauling and servicing of upto 30 Tr AC Plant compressor 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 (if available) of unserviceable worn out parts in the compressor, 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. Note:- Supply only refrigerant gas, compressor oil and spare parts for the compressors will be measured and paid under relevant items of Schedule ’A’.

Supply only following spare parts suitable for SMC 6-65 ‘Accel’ make or equivalent all as specified and directed.

Bushing with collar standard

Shaft seal assembly

Bearing bushing

Gear Wheel

Single frame (unload -65)

Rocker for unload mechanism

Bearing cup

Spring holder

Spring

Cup washer

Crank shaft

Half section of bearing standard

Bush for piston pin

Castie nut

Split pin

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

Supply only following spare parts suitable for 5F-20 of Make ‘Carrier’ 15TR or equivalent all as specified and directed.

Crank shaft

Connecting rod

Piston

Piston pin

Piston lock

Suction reed

Discharge reed

Suction valve springs

Discharge valve springs

Discharge valve assembly

Valve plate

Spring lifter pin

Gasket set

Collecing rod bearings

Oil pump assembly with bush

Shaft seal assebly

Pump end bearing

Seal end bearing

Thrust washer

Cylinder liner

Piston ring and oil ring

Supply only R-22 gas all as specified and directed.

Supply only compressor oil all as specified and directed.

Material and labour for descaling of upto 30TR 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. Note:-The quoted rate is inclusive of descalling all the units in given single location

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

HP/LP pressure cut-out MP-15

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. 12.00 above, but for VVE- 52

All as per item No. 12.00 above, but for HVE- 16

All as per item No. 15 above, but for HVE - 20

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 specified and directed.

Taking down existing corroded/ unserviceable portion of MS flat/angle iron supports/ channels /Chequerred plates of various sizes fitted in electrical panels in AC plants, stair cases and supply & fix MS flat/ angle iron/Chequerred plates /ladders as per requirement including necessary bolting/ welding etc. all as as specified and directed.

Supply and fix in repairs pilot solenoid valve to the refrigerant system, reconnecting the refrigeration piping including leak testing, brazing/flaring to the pipe line whererever required all as specified and directed.

Supply and fix in repairs loading solenoid valve to the refrigerant system, reconnecting the refrigeration piping including leak testing, brazing/flaring to the pipe line whererever required all as specified and directed.

Material and labour for replacement of suction lines, oil pressure lines, HP/LP lines and cut out lines with existing size copper tubing including necessary brazing, flaring alongwith pumping down, and recharging after complete replacement of copper tubing, neutralizing after the pressure hold good for at least 24 hours vacuumization of system, testing and commissioning of air conditioning plants all as specified and directed. Note : - Refrigerant gas shall be measured and paid for separately as supply only and pressure testing by replacing old flare nuts complete

Material and labour for preparation of surfaces by scrapping and removing rusted portion with wire brush and applying one coat of synthetic enamel paint for complete refrigeration system, in-let/out-let pipe lines, compressor unit, condenser pump set, control LT panel board duct covers, cooling tower stand including and applying one coat of white/colour wash to chiller pipe line all as specified and directed

Material and labour for complete checking, servicing/ rectification of electrical circuits for all units and control wiring showing phase sequence with proper lugging of AC plant control panel including replacement of fused indication lamps with new ones, cleaning of all power contacts, rectification of minor defects in Ammeters and Voltmeters including necessary modification/rewiring etc., testing and commissioning and painting the outer body all as specified and directed. Note :- (i) Material such as indication lamp, ammeter, voltmeter will be measured and paid separately

(ii) 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 MCCB of 250 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed.

Supply MCCB of 160 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed.

Supply MCCB of 100 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed.

Supply MCCB upto 63 Amps, 4 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed.

Supply Power contactor 32 Amps, 3 pole, 415 V complete all as specified and directed.

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.

Supply 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.

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

0-150 PSI for refrigerant line

0-300 PSI for refrigerant line

0-12 Kg./cm2 for water line

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 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.

Labour only for attending electrical breakdowns checking the serviceability, testing, replacement of minor spare parts in starters,panels,pumps, making the unit completely functional complete all as specified and directed by Engineer-in-Change :- Note - The quoted rate is deemed to be include (i) necessary T&P to attend the breakdown. (ii) Necessary labour/trade men for attending emmergency break down . (iii) labour element and spares required for making the unit completely functional such as control wiring,terminal bolts copper cables,lugs etc. (iv) PCC work wherever required

Labour only for attending break down of pipe line of upto 150mm bore, bursting/cracks and including cleaning/removal of broken pipe pieces of various lengths through gas cutting / manual cutting as per site requirement and including inserting necessary specials such as pipes MS/CI collar etc as per site requirement, testing and arresting leakages of lead joints, testing and necessary dewatering by using necessary pumps, mechanical excavator complete all as specified and directed by engineer-in-change for the following :- Note :- The quoted rate is deemed to be include (i) arrangement of suitable pump sets for dewatering at the time of breakdown. (ii) Necessary labour/trade men for attending emmergency break down . (iii) labour element required for fixing CI/DI/MS pipes, specials fittings (iv) All earth work to carry out manually as well mechanical excavator and keep mechanical excavator stand by till completion of work

Supply and fixing LED street light fitting 35 Watt 230 V AC outdoor type with high pressure diecast aluminum hosing and heat resistant complete with driver, lamp bracket along with gi pipe 1.5rm not less than 25mm with impact and corrosion resistant including thermalmanagement in multiple optics complete with IP 65/66 protection complete.

bhavani constructions (BID ID -3310674)

SRI SIDDHI VINAYAKA ENTERPRISES (BID ID -3310387)

ANAND ENTERPRISES AND ENGINEERS (BID ID -3317629)

REAL ENGINEERING WORKS (BID ID -3310285)

SATYAM ENGINEERS (BID ID -3311157)