PREVENTIVE AND ROUTINE MAINT OF SCREW CHILLER 3X120 TR AC PLANT AND CONNECTED WORKS IN PEGASUS BLDG AT NAY, NAVAL BASE KOCHI

Amount

Preventive maintenance and check up of Dunhambush chiller unit complete accessories,controlls comprising of rotory screw compressors with standared fittings electric motor with double delta starter of suitable capacity for rotory screw compressor hermatically sealed water cooled 2X120 TR=240 TR in operation and 1X120 TR as stand by suitable for operation on R-22 , DX evaporator ,Shell and tube condenser , suitable expansion device , chilled water pump 15 HP -3 Nos,condenser water pump 20 HP-3 Nos The entire system to be checked for every month interval up to contract duration and made serviceable in case of any defects observed during the routine check up for system installed at Pegasus Bldg, NAY(K). Note:- (i) Programming/ Software updatation of disply panels shall be included in quoted rates (ii)Major spares for replacement shall be measured and paid under relevant items here-in-after but labour cost shall be deemed in this item. (iii) Maint shall be done through OEM or authorized dealers

Supply only of Transducer of VOLTAS in Dhunhambush chiller of 120TR complete all as specified and directed.

supply only voltage monitor relay 460L 3 Ph, V MNT model No. AC4010460052 complete all as specified and as directed.

Supply only Liquid level switch Cat no-H009956A7 of VOLTAS in Dhunhambush chiller of 120TR complete all as specified and as directed.

Supply only of Oil level sensor all as specified and directed

Supply only of suction filter all as specified and directed

supply only temperature sensor 1.5M of model No. NTC015WH01 complete all as specified and directed.

M & L for Cleaning of 3 Nos shell and tube condenser shell with capacity of 120 TR by isolating the condenser shell, disconnecting water inlet/outlet completely remove the exisiting water from condenser attach necessary hoses to condenser to circulate chemical solution diluted HCL solution by using pump for 6-8 hrs and remove the system and after opening both sides of condenser brushing with nylon rod and flushing with fresh water including replacement of gaskets complete leak test (if reqd) and testing as directed by Engineer-in-Charge. Note: Work shall be carried out once in 06 months (ii) Nitrogen gas for leak test shall be measured and paid seperately

M & L for Cleaning of 3 Nos shell and tube type Chiller shell with capacity of 120 TR by isolating the condenser shell, disconnecting water inlet/outlet completely remove the exisiting water from chiller tubes attach necessary hoses to chiller tube to circulate chemical solution( maic / hydride decaling compound) by using pump for 6-8 hrs and remove the system and after opening both sides of chiller brushing with nylon rod and flushing with fresh water including replacement of gaskets complete leak test and vaccume test and gas charging ,testing as directed by Engineer-in-Charge. Note: Work shall be carried out once in 06 months (ii) Nitrogen gas and refrigerent for leak test shall be measured and paid seperately

Material & labour for Monthly servicing of cooling tower of cap 240 TR capacity AC Plant including removing of top Metal grill cover and cleaning the PVC Fills , alignment in proper way, replacement of rusted nuts, bolts with washers etc and clearing bottom tank to remove mud and dust complete all as directed by Engineer-in-charge.

M&L for replacement of existing butterfly valve size 200mm in condensing water pipe line with help mechanical support/scaffolding arrangement complete all as specified and directed.

Supply and fixing in replacement of PVC fills size not less than 600x200x150 mm for existing 240 TR cooling tower complete as specified and directed.

M& L for painting of central AC plant cooling tower with two coats of synthetic enamel spray paint of existing colour paint after preparation of existing surface 240TR capacity all as specified and as directed

M& L for painting of central AC plant 3 x 120 TR for Three chilling units i.e including of compressors,condensers, pumps and motors frames,panel board complete including chiller and condensing water pipe lines(appx length-75 mtr) with two coats of synthetic enamel spray paint of existing colour after preparation of existing surface of each unit and marking set numbers ,SM/MES numbers all as specified and directed.

Supply and fixing of Machine made powder coated supply/return air square diffusers of aluminium construction for supply air inletand out let complete all as specified and as directed

material and labour for checking of existing condition of air ducts making the arrangement of visualization and the process for disinfection for indoor air quality of AC ducts of inside , connection in between plenum and branches and main plenum withmechanical/Manualprocedures with using air compressor, various type of air nozzles for maintain standard indoor air quality complete all as specified and as directed

M & L for dismantling of defective condenser pump/chiller pumps of capacity 20/15 HP after disconnectiong electric connection from foundation,removing defective bearing, gland bush,heating,insulating and replacement of same gauge for existing motor copper winding, replacement of bearing,gland bush,gaskets,gland packing,nut and bolt, assembling,refitting and recommissioning including refixing of all electrical connections, testing of RPM by using digital Tachometer after repair all as specified and directed by Engineer-in-charge.

Supply and charging of Refrigerant Gas R 22 in sealed cylinder including leak testing by using nitrogen gas all as specified and directed by Engineer in Charge.

All as per item No. 18 above but of R 134A complete all as specified and directed.

All as per item No. 18 above but of R 410A complete all as specified and directed.

All as per item No. 18 above but of R 407A complete all as specified and directed.

Supply and charging of Nitrogen gas in sealed cylinder all as specified and directed. Note for item no 18 to 22 :1.Empty cylinder will returned to contractor after usage 2.Testing pressure gauges,gas charging PVC leads,technicians and transporting facility ro carring( Maximim capacity cylinders upto appx 1 ton weight) to various AC Plants at Naval base Kochi shall be own arrenged by contractor .

Supply and charging,testing of compressor oil superior quality in sealed barrel all as specified and directed by Engineer in Charge. Make:IOC/HPCL/BPCL Note:- The item has been catered for various AC plants of Naval Base at Kochi. The quoted rate shall be deemed to include transportation of the item to the site .

Supply and fix in repair Pre filter with 90% fitering capacity down to 20 micron including side aluminum beading of size 600mmx500mmx50mm as specified and directed by Engineer in charge.

All as per item No.24 above ,but size size 500mmx500mmx50mm as specified and directed by Engineer in charge.

All as per item No.24 above , but size size 500mmx450mmx50mm as specified and directed by Engineer in charge.

All as per item No.24 above , but size size 600mmx300mmx50mm as specified and directed by Engineer in charge.

All as per item No.24 above ,but size size 450mmx450mmx50mm as specified and directed by Engineer in charge. Note for item No. 23 to 28:- The item has been catered for various AC plants of Naval Base at Kochi. The quoted rate shall be deemed to include transportation of the item to the site .

AISWARYA ENTERPRISES

Green Ray Enterprises

SREENARAYANA ENTERPRISES

N.O. Antony Contractors

S. M. Enterprises

COCHIN CHEMICALS

General Engineering and Constructions

sanjay Traders

Jack Electrolinks Private Limited