87627 COMPREHENSIVE MAINTENANCE OF CENTRAL AC PLANT FOR SONABUOY STORAGE ACCN AND MAGAZINE B AND C AT ARAKKONAM

Amount

Material & Labour for gas charging by vacuumising complete system of Central type AC plant of capacity 110 TR with double stage vaccum pump of (-) 2 Kg/sqcm vaccum pressure after repairs to compressor or Repair in Refrigeration System, Charging the Dry nitrogen gas & hold up to 24 hrs and rectifing the leakage, if any, by bracing/welding/ replacing the "O" ring & Gland packing of service valve including topping up the compressor oil and charging the Gas upto desired pressure all as specified , instructed & directed. Note :- i) Once the Gas is charged in it, it should hold in the system minimum six months, if any gas leaked from the system the contractor has to charge the gas upto required level at free of cost and No extra cost on this account shall be claimed. ii) Compressor oil and Refrigerant gas shall be measured and paid separately under relevant item as supply only. iii) Labour charge for replacement of compressor oil and refrigerant gas is deemed to be included in the quoted rate. iv) Leakage test on each complete unit shall be measured independently.

Material & Labour for descaling the condenser coil of Central type AC plant capacity 110 TR by circulating descaling chemical through cooling tower re-circulating pump set up to 2 to 3 hours and opening the end cover of condenser and manually cleaning the inner tubes with nylon brush until complete scale gets removed and flushing out with fresh water, reconnecting the condenser end cover by replacing rubber gasket, bolts, nuts and including cleaning of cooling tower, make up water tank etc... as required including commissioning in all respect complete all as specified and directed.

Description all as per Sl item No. 2 here-in-before above but for Chiller of Central AC plant of capacity 110 TR complete all as specified and directed.

Taking down existing corroded MS pipe of 150mm dia including cutting the existing and Supply and fixing including welding in its original position, new 150 mm dia MS pipe line, medium grade, alongwith all specials/Joints and applying two coats of synthetic enamel paint over a coat of red oxide complete all as specified and as directed. Make: TATA/JINDAL/ZENITH/BST

Description all as per Sl item No. 4 above but for 200 mm dia MS pipe all as specified and directed.

Description all as per Sl item No. 4 above but for 250 mm dia MS pipe all as specified and directed.

Material & Labour for dismantling unserviceable Butterfly valves any type, 200 mm dia, including supply and fixing new Butterfly valve 200 mm dia , alongwith replacement of bolts , nuts , washers and rubber gaskets etc... complete all as specified and directed. Make: AUDOC/Upadhyay/L&T/Kirloskar/Normax

Description all as per Sl item No. 7 above but for 150 mm dia Butterfly valve complete all as specified and directed.

Maintenance and repairs to compressor of Central type AC plant capacity 110TR including fault finding and rectification of microprocessor based control panel including its calibration, replacing defective parts as required to keep the compressor operational, checking and testing for satisfactory operation complete all as specified and directed. Note :- i) If any defect arise in the repaired compressor including panel afterwards the contractor should repair/rectify the same without claiming any extra cost on this account. ii) Repair/ servicing work to be carried out only by service person of OEM or his authorised agency. iii) Contractor must submit service report from OEM/his authorised service agency after carrying out repairs by them.

Supply and fix MS flange 150 mm dia including Bolts ,Nuts, gasket etc... and taking down old corroded one complete all as specified and directed

Material & Labour for dismantling unserviceable / worntout "V" belts, any type / model and supply & fix new "V" Belt of following specifications including necessary testing complete all as specified and directed:- Make : FENNER / DUNLOP / V GRIP

V- Belt of size A-83

V- Belt of size A-57

Taking down the centrifugal pump set,12 to 15 HP , 3 phase, 415 volts, 50 Hz ( condenser & chilled water re-circulating pump set) for servicing /overhauling by replacing unserviceable bush & bearings, gland packing , studs, gasket etc... including machining work to shaft reassemble the pump set and painting with two coats of synthetic enamel paint, erecting testing and commissioning complete all as specified and directed.

Description all as per Sl item No. 12 herein before but of capacity 10 HP

Description all as per Sl item No. 12 herein before but of capacity 7.5 HP

Taking down the condenser water recirculating pumpset along with MS frame from the existing foundation and supply newly fabricated MS frame of same type and size as per existing specification including necessary welding & fixing and including connecting inlet & Outlet as well as other electrical connections of pump etc... for smooth funtioning complete all as specified and directed.

Taking down the unserviceable centrifugal motor and dismantling including taking out damaged/burnt out winding from motor, cleaning the slots with CTC and rewinding the same with new super enamelled copper winding wire of existing gauge and turns, oiling and greasing assembling and installing back into position for making motor fully functional and testing for satisfactory running complete all as specified and directed for the following capacities:-

Supply only Compressor oil (grade as per manufacturer recommendation)

Supply only Refrigerant gas (Non-CFC) R-134A

Supply only Refrigerant gas (Non-CFC) R-407 C Note for item no 17 to 19:- Labour charges are deemed to be included in the quoted rate of relevant repair items

Material and labour including fabrication of MS Hand rails, supporting structure, etc... fabricated from structural steel sections, including nuts, bolts, washers,welding, bending cold or hot,drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint including embeding in concrete and screwing etc... complete all as specified and as directed.

Material & Labour for Servicing and cleaning of following Air Handling Units ( AHU's ) including humidification pumps of Central type A/ C including taking down and cleaning of air filters by castic soda and flushing with water and refixing in original position and cleaning of fire dampers , blowers , spray nozzles , condensate water tray including greasing of blower bearing / blower motor , tightening belt, providing necessary bolts, nuts and testing for proper functioning complete all as specified and as directed. Note :- (i) Servicing of AHU to be carried out twice in the entire contract period and Each job will be measured and paid separately. (ii) Spares required for replacement, if any, shall be measured and paid separately under relevant items as supply and fixing.

a) AHU at Sonabuoy complex

b) AHU at Magazine "B" & "C"

Supply & Replace the MS lov - joy (Male & Female) coupling, complete with star rubber disc, as per sample, for condenser recirculating pump & chilled water pump all as specified and directed.

Supply & Replace the star rubber disc for lov - joy, as per sample, for condenser recirculating pump & chilled water pump all as specified and directed.

Supply and fix expansion valve suitable for 110 TR central AC plant all as specified and directed. Make: Voltas

Supply and replace oil pressure cutout all as specified and directed. Make: indfoss/danfoss

Supply and replace water pressure cutout all as specified and directed. Make : indfoss/danfoss

Supply and replace pressure gauge/Temperature gauge all as specified and directed. Make: scientific/fiebeg

Supply & replace temperature sensor for water entering & leaving from condenser / chiller A/C plant/ AHU room complete all as specified and directed.

Supply and replace single phase preventer 415 V, 3 Ph complete all as specified and directed. Make: L&T/Siemens/ABB/Crompton Greaves/GE

Supply & Replace HP /LP pressure cut out switch complete all as specified and directed.

Supply & Replace HP pressure switch

Supply & Replace LP pressure switch

Supply and replace microprocessing unit PCB set as per recommendation of manufacturer for functioning of Central Air conditioning plant complete all a specified and directed.

Taking down/ dismantling the defective hot water generator for servicing /overhauling including replacing unserviceable accessories, and carrying out painting with two coats of synthetic enamel paint and re-erecting including all connections, testing complete all as specified and directed.

Material and Labour for taking down unserviceable electrical contactors / relays / disconnectors/ Timer / fuse unit , any type /capacity / model from electrical control panels including supply and fixing items of following specifications all as specified and as directed :-

Contactor Set for 3 pole contactor AC, 415V, 70 Amps as existing . Make: L&T/Siemens/ABB/Crompton Greaves/GE

Over load relay (direct mounting) of Range 63 - 80Amps Make: L&T/Siemens/ABB/Crompton Greaves/GE

Over load relay of Range 100 - 160 Amps Make: L&T/Siemens/ABB/Crompton Greaves/GE

Contactor set for 3 pole AC,415V ,32 Amps as existing. Make: L&T/Siemens/ABB/Crompton Greaves/GE

Contactor set for 3 pole AC,415V ,25 Amps as existing. Make: L&T/Siemens/ABB/Crompton Greaves/GE

Material and labour for taking down the burnout / defective scroll type compressor from 11 TR unit and replace the factory made compressor including re-fixing and charging with dry Nitrogen gas, leakage/pressure testing, arresting the leakage by brazing and vacumming, gas charging, testing and commissioning complete all as specified and directed. Note : Leak test , Vacuuming & Refrigerant gas shall be measured separately under relavant items.

Material and Labour for carry out the leak test complete system of central AC Plant 11TR by charging the dry nitrogen gas & holding up to 24 hrs and rectifying the leakage if any by bracing / welding / replacing the 'O' ring etc... and Vacuumising complete system of Air-conditioning plant with double stage vaccum pump of (-) 2 Kg/Sqcm vaccum pressure after repairs to line / replacement of compressor or Repair in Refrigeration System, including charging the refrigerant Gas upto desired pressure all as specified & directed. Note :- i) Once the Gas charged in it, it should hold in the system for minimum six months, if any gas leaked from the system the contractor has to charge the gas upto required level at free of cost and No extra cost on this account shall be claimed. ii) Refrigerant gas shall be measured and paid separately under relevant item as supply only. iii) Labour charge for replacement of refrigerant gas is deemed to be included in the quoted rate. iv) leakage test on each complete unit shall be measured independently.

Supply and replace Air filter, 5 Micron washable type suitable for AHU of Central Air conditioning plant all as specified and directed.

Universal refrigeration and Engineering Company

C SRINIVASAN