87656 REPAIRS/MAINTENANCE TO CENTRAL AC PLANTS AT CERTAIN STORAGE ACCN OF SONABUOY AND NAD AT ARAKKONAM

Amount

Material and Labour for gas charging by vaccumising complete system of Central type AC plant of capacity 110TR with double stage vacuum pump of (-) 2 Kg/Sqcm vacuum pressure after repairs to compressor or Repair in Refrigeration System, Charging the Dry nitrogen gas and hold up to 24 hrs and rectifying the leakage if any by bracing/welding/ replacing the "O" ring and Gland packing of service valve including Top up the compressor oil and charging the Gas upto desired pressure all as specified instructed and directed NOTE: (i)Once the Gas charged, 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 on 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 separately.

Material and Labour for descaling the condenser coil of Central type AC plant capacity 110TR by circulating descaling chemical through cooling tower re-circulating pump set up to 2 to 3 hours and open the end cover of condenser and manually clean the inner tubes with nylon brush until complete scale gets removed and flush 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 as directed.

All as per item No 2 herein before but of capacity 38 TR ,complete all as specified and as directed.

All as per item No 2 herein before but of capacity 25 TR, complete all as specified and as directed.

All as per item No 2 herein before but of capacity 12 TR, complete all as specified and as directed.

All as per item no-2 above but for chiller of Central AC plant of capacity 110 TR, complete all as specified and as directed.

All as per item no-2 above but for chiller of Central AC plant of capacity 38 TR, complete all as specified and as directed.

All as per item no-2 above but for chiller of Central AC plant of capacity 25 TR, complete all as specified and as directed.

Material and labour for butterfly valve 200 mm dia including dismantling existing valve and replacement of bolts, nuts, washers and rubber gaskets all as directed.

All as per item no-9 above but for 150 mm dia complete all as specified and as directed.

Maintenance and repairs to compressor unit of Central type AC plant capacity 110TR including fault finding and rectification on microprocessor based control panel including its calibration all as specified and directed, Note:- (i) Repair/servicing work to be carried out only by service person of OEM or his authorised agency (ii) Contractor must submit service report from OEM/his authorised service agency after repair by them

Material and Labour for dismantling unserviceable / worn-out "V" belts any type / model supply and fix new "V" Belt of following specification and testing Make - FENNER / DUNLOP / V GRIP

(a) V-Belt of size A-83

(b) V-Belt of size A-57

(C) V-Belt of size B-124

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

All as per item No 13 herein before but of capacity 10 HP, complete all as specified and as directed.

All as per item No 13 herein before but of capacity 7.5 HP, complete all as specified and as directed.

Supply and fabricate MS frame as per existing specification including welding and fixing including painting with two coats of synthetic enamel paint , connecting inlet and Outlet, electrical connections of pump etc.including taking down the condenser water recirculating pump set along with MS frame from the existing foundation, complete all as specified and as directed

Taking down the unserviceable 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 for the following capacities

Supply only Compressor oil (grade as per manufacturer recommendation) complete all as specified and as directed.

Supply only Refrigerant gas (Non CFC) R-134A,complete all as specified and as directed.

Supply only Refrigerant gas (Non CFC) R-407 C Note for item no 16 to18 - Labour charge is deemed to be included in the quoted rate of relevant repair items.

Material and Labour for Servicing and cleaning of following Air Handling Units (AHU's) incl humidification pumps of central type A/C including taking down and cleaning of air filters by caustic 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, all bolts, nuts and testing for proper functioning all as specified and as directed Note :- (i) Servicing of AHU to be carried out once 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.

AHU at Sonabuoy complex

AHU at Magazine BandC

AHU at MK 54

AHU at Magazine 'A'

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

Supply and Replace the star nylon disc for lov - joy as per sample for condenser recirculating pump and chilled water pump complete all as specified and as directed

Supply and fix expansion valve suitable for 110 TR central AC plant complete all as specified and as directed. Make - Voltas or equivalent as approved by GE

Supply and replace oil pressure cutout complete all as specified and as directed. Make : indfos/danfoss or equivalent as approved by GE

Supply and replace water pressure cutout complete all as specified and as directed. Make : indfos/danfoss or equivalent as approved by GE

Supply and replace pressure gauge/Temperature gauge complete all as specified and as directed. Make Scientific/ Fiebig or equivalent as approved by GE

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

Supply and replace single phase preventer unit 415 V 3Ph complete all as specified and as directed. Make : Minilec, Model: VSP-3 415 Volt AC, 3 Phase, 50 Hz/L&T/ Siemens.

Supply and Replace HP/LP pressure cutout switch complete all as specified and as directed.

Supply and Replace HP pressure switch complete all as specified and as directed.

Supply and Replace LP pressure switch complete all as specified and as directed.

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

Taking down the defective hot water generator and dismantling for servicing/overhauling including replacing unserviceable accessories, and re-erecting including all connections 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 fix items of following specifications all as specified and as directed

Contactor Set for 3 pole AC 415V, 70 Amps as existing. Make: BCH/ L &T /Siemens

Contactor Set for 3 pole AC3, 110 Amps as existing. Make: BCH/ L &T /Siemens

Overload relay (direct mounting) of Range 63 - 80Amps Make: BCH/ L &T /Siemens

Over load relay of Range 100 - 160 Amps Make: BCH/ L &T /Siemens

Contactor set for 3 pole AC 415V 32 Amps as existing Make: BCH/ L &T /Siemens

Contactor set for 3 pole AC 415V 25 Amps as existing. Make: BCH/ L &T /Siemens

Material and labour for taking down the burnout/ defective scroll type compressor from 12.5 TR unit and replace the factory made compressor testing and commissioning complete all as specified and directed Note:- Leak test, Vacuuming and Refrigerant gas shall be measured separately under relevant items.

Material and Labour for carry out the leak test complete system of central AC Plant 12.5TR by charging the dry nitrogen gas and hold up to 24 hrs and rectifying the leakage if any by bracing/ welding / replacing the ‘O’ ring etc and Vaccumising complete system of Air-conditioning plant with double stage vacuum pump of (-) 2 Kg/cm so vacuum pressure after repairs to line / replacement of compressor or Repair in Refrigeration System, including charging the refrigerant Gas upto desired pressure Complete all as specified and as directed. Note:- (i) Once the Gas charged in 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 on 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 separately.

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

Supply and fix Non Return Valve 150 mm bore including dismantling old/unserviceable and replacement of bolts, nuts, washers and rubber gaskets complete all as specified and as directed.

Supply and fix new water strainer 150 mm bore dia. both flanged "U" type and suitable for existing location including dismantling unserviceable and replacement of bolts, nuts washers and rubber gaskets complete all as specified and as directed.

Supply and replacement of MCCB adjustable type of following capacity/specification 440V, 50Hz with extended terminal and spreader link complete all as specified and as directed.

MCCB 4 pole, 36 KA, 250Amp

MCCB 4 pole, 16 KA 63 Amp

MCCB 4 pole, 16 KA 40 Amp

Material and Labour for servicing and cleaning of following cooling towers of central type A/C plant including taking down and cleaning of air filters with water and refixing in original position and painting in one coat same as existing colour and testing for proper functioning all as specified and as directed Note:- (i) Servicing of cooling tower 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.

Cooling tower at Sonabuoy complex

Cooling tower at MK 54

Cooling tower at Magazine 'A'

Supply and replacement of Fils for cooling tower suitable for Central AC Plant complete all as specified and as directed. Make: Delta/Mihir/ Blue Star

Supply and replacement of sprinkler assembly for cooling tower suitable for 110 TR capacity complete all as specified and directed. Make: Delta/Mihir/Blue Star

Supply and replacement of Drift eliminators assembly for cooling tower suitable for 110 TR capacity complete all as specified and directed. Make: Delta / Mihir / Blue Star

Supply and replacement of PVC mesh for cooling tower complete all as specified and directed.

Material and Labour for painting MS Pipe of any dia with one coat of metal primer and two coats of oil paint including cleaning with wire brush complete all as specified and directed.

Supply and replacement of VFD Drive and connected accessories complete all as specified and directed. Make: Blue Star/Voltas or equivalent as approved by GE

C SRINIVASAN

KRISHNA ENTERPRISES