COMPREHENSIVE MAINTENANCE OF VRF / DUCTABLE / PACKAGE / CENTRAL AC SYSTEM AT INSIDE AND OUTSIDE FORT WILLIAM UNDER GE(FW) KOLKATA

Amount

NOTE :The bidders/contractors are advised to read tender document & all corrigendum/ amendments and General conditions of contracts before entry/quoting the rates.

M&L for vacuuming complete system of central air conditioning plant at Signal Centre(3x45TR) of Make OEM : York with double stage vacuum pump of (-) 2Kg/cm² 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 leackage if any by repairing the "O" ring and gland packing of service valve/ Oil seal, including top up the compressor oil and charging R-22 / R134a gas at various plant all as specified and directed by Eng-in-charge including testing and commissioning complete. Note :- (a) Referigerant Gas R-22/R-134a, Nitrogen gas and compressor oil will be measured and paid separately under relevant items as supply only. (b) After charging R-22/R134a gas, if any leakage of gas from the system happens within six months, then contractor shall be responsible for re-charging gas at his own cost. (c) Testing and commissioning complete all as directed by Engineer-in-Charge

All as per Item No 2.0 here-in-before but for central air conditioning plant at Auditorium (2 x 61TR) of Make OEM : Daikin

All as per Item No 2.0 here-in-before but for central air conditioning plant at Auditorium (2 x 60TR) of Make OEM : Hitachi (For 04 Months periodic servicing)

M&L for De-scaling the shell and tube condensor of Central type AC Plant at Signal Centre of capacity 1x45TR of Make OEM : York by circuilating de-scaling chemical through for 2 to 3 hours, opening the end cover of condensor and cleaning inner tubes manually with the help of nylon / wire brush until complete scale is removed and flush out with fresh water. Reassembling the end cover including replacement of gasket, bolts, nuts etc as required and commissioning complete all as directed by Eng-in-charge. Note:- (a) De-Scaling of all Condensors of AC Plants shall be done twice during contract period as directed by Engineer-in-charge and quoted unit rate of this item shall be deemed inclusive that cost.

All as per Item No 5.0 here-in-before but for central air conditioning plant at Auditorium of capacity 1x61TR of Make OEM : Daikin

All as per Item No 5.0 here-in-before but for central air conditioning plant at Auditorium of capacity 2x60TR of Make OEM : Hitachi (For 04 Months periodic servicing)

M&L for isolating the screw compressor of Central type AC Plant at Albert Ekka Auditorium of capacity 2x61 TR of Make OEM : Daikin by loosing/ cutting nuts and bolts at suction and discharge valve opening of compressor, removing the unservicable/ damaged internal parts, cleaning, overhauling complete, replacement of wornout parts such as suction reeds, discharge reeds, safety valve, loading/ unloading mechanism, piston, rings, springs, washers, nuts and blots, gasket set, shaft seal, 'O' ring set, recharging compressor oil and refrigerant after pressure test and vaccum testing complete all as directed by Eng-in-charge. Note:- 1. Cost of all necessary spares require to be renewed shall be included in quoted unit rate.

M&L for isolating the screw compressor of Central type AC Plant at Suryodya Auditorium of capacity 2x60 TR of Make OEM : Hitachi by loosing/ cutting nuts and bolts at suction and discharge valve opening of compressor, removing the unservicable/ damaged internal parts, cleaning, overhauling complete, replacement of wornout parts such as suction reeds, discharge reeds, safety valve, loading/ unloading mechanism, piston, rings, springs, washers, nuts and blots, gasket set, shaft seal, 'O' ring set, recharging compressor oil and refrigerant after pressure test and vaccum testing complete all as directed by Eng-in-charge. Note:- 1. BOQ item No 8 will be executed after DLP i.e. April 2025. 2. Cost of all necessary spares require to be renewed shall be included in quoted unit rate.

M&L for isolating the reciprocating compressor of Central type AC Plant at Signal Centre of capacity 3x45 TR of Make OEM : York by loosing/ cutting nuts and bolts at suction and discharge valve opening of compressor, removing the unservicable/ damaged internal parts, cleaning, overhauling complete, replacement of wornout parts such as suction reeds, discharge reeds, safety valve, loading/ unloading mechanism, piston, rings, springs, washers, nuts and blots, gasket set, shaft seal, 'O' ring set, recharging compressor oil and refrigerant after pressure test and vaccum testing complete all as directed by Eng-in-charge. NOTES :- 1. Cost of all necessary spares except item No 11 require to be renewed shall be included in quoted unit rate.

Supply only components / spare parts of compressor to incorporate against item No 9 above Note:- Make and model of components / spare parts to be renewed shall be same as existing at site or as per OEM.

Supply only Piston Ring

Supply only Cylinder liner

Supply only Oil strainer

Supply only Safety valve assembly

Supply only Crank Shaft seal with assembly

Supply only Connecting rod

Supply only Neoprene 'O' ring with aluminium washer

Supply only Piston pin

Supply only Suction valve ring plate including reeds

Supply only Discharge valve ring plate including reeds

Supply only Main bearing bush (Bushing with detachable collar)

Supply only Piston

Supply only Suspension rod (Single frame for unloading)

Supply only Rocker arm for unloading mechanism

Supply only Valve spring

Supply only Spring for unloading ring

Supply only Discharge valve assembly

Supply only C.R. bearing u/size

Supply only Suction strainer

Supply only Gear wheel for oil pump (driving)

Supply only Gear wheel for oil pump (driven)

Reconditioning of crank shaft retrieved from item No 8.00, 9.00 & 10.00 by cutting / turning for under size at lathe work complete all as directed.

S&F of loading / unloading valve including necessary wiring and copper pipe line of suitable size and length complete all as specified and directed as in repair.

S&F of toggle switch one way 5 Amps. Capacity complete all as specified and directed as in repair

Dismantling and taking up unserviceable electric motors of any size/ capacity of make Kirloskar from foundations after disconnecting electric connections and transportation from site to work shop for carrying out repairs / rewinding of motors as required incluidng re-fixing in position and connecting and testing complete all as directed. Note:- Necessary rewinding and renewal of terminal connector , fan blade, squirrel cage, ball bearing will be measured and paid separately.

M&L for opening up short circuited electric induction motor 5 HP, 3 phase AC 440 Volts of Make OEM : Kirloskar, cutting and removing the burnt stator winding coils complete and re-winding the same with super enamelled copper conductor wires of appropriate size as per the existing gauge including cleaning of slots, all necessary insulating materials, varnishing, dryining complete all as specified and directed at site for 5HP capacity as in repair :-

All as per item No 16 here-in-before but for 10 HP capacity motor

All as per item No 16 here-in-before but for 15 HP capacity motor

All as per item No 16 here-in-before but for 50 HP capacity motor

S&F of terminal connector for motors of 5 HP capacity as in repair

All as per item No 20 here-in-before but for 10 HP capacity motor

All as per item No 20 here-in-before but for 15 HP capacity motor

All as per item No 20 here-in-before but for 50 HP capacity motor

S&F of PVC fan blade for motors of 5 HP capacity as in repair

All as per item No 24 here-in-before but for 10 HP capacity motor

All as per item No 24 here-in-before but for 15 HP capacity motor

All as per item No 24 here-in-before but for 50 HP capacity motor

S&F of squirrel cage induction motor shaft by welding / grinding, polishing to required sizes for motors of 5 HP capacity as in repair Make OEM :- Kirloskar

All as per item No 28 here-in-before but for 10 HP capacity motor

All as per item No 28 here-in-before but for 15 HP capacity motor

All as per item No 28 here-in-before but for 50 HP capacity motor

Replacement of pump end ball bearing suitable for 5HP capacity as in repair

All as per item No 32 here-in-before but for 10 HP capacity

All as per item No 32 here-in-before but for 15 HP capacity

All as per item No 32 here-in-before but for 50 HP capacity

M & L for carrying out repair to Centrifugal pump 10 HP of Make OEM :- Kirloskar after dismantling the assembly complete for replacement of worn out spares such as impellers, pump shaft, sleeves, bushes etc; including filling, turning & polishing works to pump shaft, GM impellers as necessiated, reassembling the pump after repairs and testing complete including applying a coat of water proof epoxy paint to the external surfaces of pump all as specified and directed. Note : Necessary components / spare parts such as impeller with Key & Bushes, pump shaft, bearing, coupler sleeve require to be renewed will be measured and paid separately as supply only.

Supply only GM impellers for Centrifugal pump 10 HP with key and bushes complete all as directed

Supply only Pump Shaft steel for Centrifugal pump 10 HP with key and bushes complete all as directed

Supply only Bearing & bush for Centrifugal pump 10 HP with key and bushes complete all as directed

Supply only Motor coupler sleeve with key suitable for Centrifugal pump set of existing make/capacity complete all as directed.

S&F of PVC insulated and sheathed submersible copper cable, 3 core, with multi-stranded copper conductor of 1100 volts grade and size 10 sq mm complete all as directed by Engineer-in-Charge.

S&F of PVC insulated and sheathed submersible copper cable, 3 core, with multi-stranded copper conductor of 1100 volts grade and size 16 sq mm complete all as directed by Engineer-in-Charge.

Supply only refrigerant gas (R-22) to refrigeration and A/C system and testing for leakage in system and commissioning complete up to the satisfaction and as directed by Engineer-in-Charge

Supply only refrigerant gas (R-134a) to refrigeration and A/C system and testing for leakage in system and commissioning complete up to the satisfaction and as directed by Engineer-in-Charge

Supply only compressor oil N-68 after flushing compressor and testing, commissioning complete all as specified and directed by Engineer-in-Charge.

Draining / Taking out unserviceable compressor oil 160 P and charging with new compressor oil complete all as specified and directed.

S&F of Copper Refrigerant tube of 1/2" outer dia, minimum 1mm thick for condensor of AC Plants complete all as specified and directed.

Supply only nitrogen gas for leak testing of central A/C plant system complete all as directed.

S&F of pressure gauge 4"dia suitable for refrigerent gas ( R-22) and compressor oil including copper pipe as per site (2m Long) with flair nuts/adopter at both ends,range of gauge (-)30 to 300 Psi complete all as specified and directed as in repair..

S&F of wornout / unserviceable "V" belt for power transmission of size - B-80 complete as directed by Engineer-in-Charge as in repair.

All as per item No 50 here-in-before but for size - B-110

All as per item No 50 here-in-before but for size - B-124

Replacement of unservicable Oil Pressure cutout MP-55 of central type A/c plants and testing complete as directed by Engineer-in-Charge as in repair.

S&F of unservicable High pressure cutout MP-1 of central type A/c plants and testing complete as directed by Engineer-in-Charge as in repair.

S&F of unservicable Low pressure cutout MP-5 of central type A/c plants and testing complete as directed by Engineer-in-Charge as in repair.

S&F of thermometer to condenser / chiller inlet or outlet pipe including addition alteration to pipe line for fixing thermometer Range 0 F to 100 F complete all as specified and directed as in repair.

S&F of old unserviceable pressure relief valve of condensor 3/8" BSP threaded suitable for 300 PSI complete all as specified and directed as in repair.

S&F of worn out HRC fuse of 6 Amps as in repair.

All as per item No 58 here-in-before but for HRC fuse of 10 Amps

All as per item No 58 here-in-before but for HRC fuse of 16 Amps

All as per item No 58 here-in-before but for HRC fuse of 32 Amps

All as per item No 58 here-in-before but for HRC fuse of 63 Amps

All as per item No 58 here-in-before but for HRC fuse of 100 Amps

S&F of AHU filter of various sizes made of wire mesh for air filteration upto 15 microns complete all as specified and directed as in repair.

S&F of wornout strip type heaters of capacity 1.5 KW suitable for AHU of central AC Plant of any capacity complete all as specified and directed as in repair.

All as per item No 65 here-in-before but heaters of 3.0 KW capacity

S&F of moulded fuse holder and fuse base for 415V AC supply 32 Amps capacity bakelite type complete all as specified and directed as in repair.

All as per item No 67 here-in-before but moulded holder and fuse base of 63 Amps capacity

S&F of single phase preventer in electric panel board at central type AC plants complete all as per direction of Eng-in-charge as in repair.

S&F of power contactor 3 pole, coil voltage 230/415 Volts for 32 Amps capacity motor

All as per item No 70 here-in-before but for 40 Amps capacity motor

All as per item No 70 here-in-before but for 100 Amps capacity motor

S&F of bimetal over load relay of 16 Amps range

All as per item No 73 here-in-before but for 20 Amps range

All as per item No 73 here-in-before but for 32 Amps range

S&F of MCCB 100Amps ,415 volt, AC 50 Hz, 4 pole, 36 KA Ics =100%Icu with thermal magnetic controlled, adjustable Over load and short circuit settings complete all as specified and directed.

S&F of MCCB 63Amps ,415 volt, AC 50 Hz, 4 pole, 36 KA Ics =100%Icu with microprocessor controlled, adjustable Over load and short circuit settings complete all as specified and directed.

All as per Item No 78 Here-in-before but supply and fix CT's of suitable ratio for LT 3 phase system, 1.1 kv grade, single burden, general purpose, of CT ratio as per site requirement.

All as per Item No 78 Here-in-before but supply and fix LED Indicator Lamps for each phases including holders and of colours red / yellow / blue etc.

All as per Item No 78 Here-in-before but supply and fix Timer Switch of starter

All as per Item No 78 Here-in-before but supply and fix MCB FP 32 Amps , C Curve, 50 Hz, 10 kA complete all as specified and directed.

S&F of Push button assembly in green or red colour complete all as directed by Eng-in-charge.

S&F of add-on block with 2NO - 2NC contacts complete all as directed by Eng-in-charge.

M&L for servicing of cooling tower of Central AC plant at Signal Centre(1x45 TR) of Make OEM : York by draining water, cleaning the tank by caustic soda, repairing of sprinklers, replacement of frills, repairing the bracket for fixing the frills to CT of any capacity. Repairing / cleaning the FRP cooling tower of capacity upto 20 ton, top / side covers, removing the fan motor assembly, over hauling the fan motor, taking down the sprinkler, water main header pipe , PVC frills (Honeycomb) , cleaning throughly incl replacing the bearing of fan, and reassembled in all respect for smooth functioning Note :- (a) Cooling tower frills, sprinklers & Fill Pack Sheet will be measured and paid separately under relevant items.

All as per item No 85 here-in-before but for Central AC plant at Auditorium (1 x 61TR) of Make OEM : Daikin

All as per item No 85 here-in-before but for Central AC plant at Auditorium (2 x 60TR) of Make OEM : Hitachi

Supply only PVC frills made out of PVC materials including fixing arrangements all as shown and directed by Engineer-in-Charge as in repai .

Supply only sprinkler suitable for cooling tower for 61 TR capacity all as directed by Engineer-in-Charge.

Supply only Fill pack Sheet in cooling tower of existing make, shape and size complete all as specified and directed.

M&L for painting to GI pipe line 150/100/80 mm dia for Condensor Water Pump to Cooling Tower and vice versa as per existing colors code with all supporting materials with one coat of synthetic enamel paint from ground level to bottom of the dome of the make up tank complete all as directed. Note :- Special type of tools & tackles, swings, scaffolding and safety accessories etc require for the work shall be arranged by the contractor and unit rate quoted shall deemed to be included for the same.

M&L for Painting to compressor, condensor, compressor motor, Condensor Water Pump, AHU motor and Cooling Tower-02 Nos and vice versa as per existing colors code with all supporting materials with one coat of synthetic enamel paint from ground level to bottom of the dome complete all as specified and directed (Signal Centre 3X45 TR) Note :- Special type of tools & tackles, swings, scaffolding and safety accessories etc required for the work shall be arranged by the contractor and rate quoted shall deem to be include for the same.

M&L for Painting to compressor, condensor, compressor motor, Condensor Water Pump, AHU motor and Cooling Tower and vice versa as per existing colors code with all supporting materials with one coat of synthetic enamel paint from ground level to bottom of the dome complete all as specified and directed (Auditorium 2X61 TR) Note :- Special type of tools & tackles, swings, scaffolding and safety accessories etc require for the work shall be arranged by the contractor and unit rate quoted shall deem to be include for the same.

M&L for joists of Cooling Tower, bracings, supports, clamps, straps D-clamps, back plates and MS frames fabricated from structural steel sections such as MS channel, angle iron and flats of suitable size etc including nuts, bolts, washers eye hooks, welding, bending cold or hot drilling holes for bolts in any shape or size including two coats of synthetic aluminium paint over a coat of red oxide primer after preparation of steel surface complete all as specified and directed as in repair.

S&F of CI butter fly valve of dia 100mm PN 1.6, ISI Marked suitable for condensing /chiller water line with ISI marked including jointing with proper gasket ,nut,bolts washer complete all as specified by Engr-in- charge as in repair.

All as per item No 95 here-in-before but for butter fly valve of 150mm dia

S&F of NRV of dia 80 mm PN 1.6, ISI marked suitable for condensing /chiller water line with ISI marked including jointing with proper gasket ,nut,bolts washer complete all as specified by Engr-in- charge as in repair.

All as per item No 97 here-in-before but for butter NRV of 100mm dia

Periodic maintenance including supply of all consumable lubricants and repair or replacement of all components (spare parts) which may occur due to wear and tear for entire package air condition unit 1x8.5 TR (Make OEM : Blue Star) at North Barrack Engr Branch including clening entire installation and daily maintenance of necessary records & documents complete all as specified and directed Note:- Necessary record of maintenance for any consumable items / spares / servicing is to be submitted weekly to Engineer-in-Charge.

Periodic maintenance including supply of all consumable lubricants and repair or replacement of all components (spare parts) which may occur due to wear and tear for entire package air condition unit 3x11 TR (Make OEM : Blue Star) at P-1 Bldg including clening entire installation as directed. Note:- Necessary record of maintenance for any consumable items / spares / servicing is to be submitted weekly to Engineer-in-Charge.

Periodic maintenance including supply of all consumable lubricants and repair or replacement of all components (spare parts) which may occur due to wear and tear for 13 nos TFA/Air cooled Motor plant at New EC OTM Building(P-192) including cleaning entire installation as Directed by Engineer-in-Charge. Make OEM - Bluestar

Supply, fabrication , installation and testing of GSS sheet metal of 20 Gauge (1 mm thick) factory /Site made rectangular ducts, complete with MS frame structure and necessary supports using thread roads and anchor bolts, supply air collars, vanes complete with splitter damper, duct damper, vanes etc fabricated out of galvanized sheet class VIII conforming to IS 277. The duct fabrication and installation shall confirm to IS 655-2006 all dampers, splitters shall be fabricated out of GS sheet of two gauges higher than the duct piece having these fittings of following sizes.All Items related to fabrication to fabrication of ducts shall confirm to the relevant IS mentioned in IS

S&F of thermal insulation on the sheet metal duct wrapped with Aluminium foil faced class "O" 25 mm thick closed cell nitrile rubber on ducts installed inside the auditorium complete all as specified and directed.

S&F of copper refrigerant tube of 1/2" Outer Dia minimum 1mm thick for condensor of AC Plants complete all as specified and directed as in repair.

S&F of GI earth wire for continuous earth wire for VRF AC Plants out of 4 mm dia galvanised steel wire including clamping in walls/floors complete all as specified and directed including taking down the existing & removing from site as in repair.

S&F of PVC flexible pipe/conduit cover 25mm dia for connection of electrical wires from Panel to VRF/Ductable AC System duly fixed/clamped in walls/floors by saddles and replacement of worn out copper lugs of suitable size as per site complete all as specified and as directed including taking down the existing & removing from site as in repair.

Note: Schedule of credit (SCHEDULE OF CREDIT) amount of ₹ 41,570.00 mentioned on Page No 40 shall be deducted from the total quoted amount of BOQ.

EASTERN REFRIGERATION AND ELECTRICAL CO (BID ID -3495079)

INDIA ELECTRICAL EQUIPMENTS (BID ID -3492440)

RADHA ENTERPRISE (BID ID -3491700)

ELECTRO FREEZE (BID ID -3494191)