87722 REPAIR AND MAINTENANCE TO CENTRAL AC PLANT IN CERTAIN STORAGE ACCN AT INS RAJALI ARAKKONAM

Amount

SCHEDULE 'A'

Leak test and gas charging of Central AC Plant Screw Compressor unit of capacity 110 TR

Leak test and gas charging of Central AC Plant Scroll Compressor unit of capacity 12.5 TR

Material & Labour for Descaling the Condenser unit of Central type AC plant of following capacity full system by circulating descaling chemical with water (made ph value of circulating water shall be 01) 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 directed. Note :- (i) Descaling to be carried out twice in the entire contract period and Each job will be measured and paid separately. (ii) During descaling any damage to copper coil which leads to leakage of gas, contractor shall be resposible to rectify the damage and gas to be filled after leak test without any extra cost (iii) Full system include total Number of condensers in the mentioned capacity AC Plant (iv) Pressure difference between inlet and outlet of condenser unit shall be reduced to prefered level given by manufacturer after descaling.

Descaling the condenser units of Central AC plant of capacity 110 TR full system

Descaling the condenser units of Central AC plant of capacity 38 TR full system

Descaling the condenser units of Central AC plant of capacity 25 TR full system

Material & Labour for Descaling the chiller units of Central type AC plant of following capacity full system by circulating descaling chemical with water (made ph value of circulating water shall be 01) through cooling tower re-circulating pump set up to 2 to 3 hours complete all as directed. Note :- (i) Descaling to be carried out twice in the entire contract period and Each job will be measured and paid separately.

Descaling the Chiller units of Central AC plant of capacity 110 TR full system

Descaling the Chiller units of Central AC plant of capacity 38 TR full system

Descaling the Chiller units of Central AC plant of capacity 25 TR full system

Material & Labour for maintenance and repairs / attending the complaint to the compressor unit of Central type AC plant of following capacity including fault finding and rectification 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) After rectifying the complaint, same type of complaint within 1 month for the same unit shall not be paid (iii) Servicing / replacing of PCB / replacement of any other parts will be paid seperately under relavent items

Attending the complaint to the compressor unit of Central AC plant of capacity 110 TR

Attending the complaint to the compressor unit of Central AC plant of capacity 38 TR

Attending the complaint to the compressor unit of Central AC plant of capacity 25 TR

Material & Labour for dismantling unserviceable / wornout "V" belts any type / model , supply and fix new "V" Belt of following specification and testing complete all as directed

V- Belt of size A-57

V- Belt of size A-83

V- Belt of size B-70

V- Belt of size B-124

S &F Butterfly Valve of following size, with replacement of bolts, nuts, washers and rubber gaskets including dismantling of old unserviceable Butterfly valves any type all as directed.

Butterfly Valve of size 150 mm dia all as specified and directed.

Butterfly Valve of size 100 mm dia all as specified and directed.

Butterfly Valve of size 80 mm dia all as specified and directed.

Butterfly Valve of size 50 mm dia all as specified and directed.

S & F new NRV butterfly type of following size with replacement of bolts , nuts , washers and rubber gaskets including dismantling of old unserviceable NRV all as directed.

NRV of size 150 mm bore

NRV of size 100 mm bore

NRV of size 80 mm bore

NRV of size 50 mm bore

S & F new Water strainer of following size, both ends flanged "U" type and suitable for existing location with replacement of bolts, nuts , washers and rubber gaskets including dismantling unserviceable water strainer all as directed.

Water strainer of size 150 mm dia

Water strainer of size 80 mm dia

Water strainer of size 50 mm dia

Taking down the existing corroded MS pipe of following sizes for condenser water recirculating pipe line and M&L including welding in its original position new MS pipe line medium grade including all specials/Joints, painting with 2 coats of synthetic enamel paint over red oxide primer as per zonal standard colour code all as specified and directed.

MS pipe of size 40 mm dia

MS pipe of size 80 mm dia

MS pipe of size 100 mm dia

MS pipe of size 150 mm dia

S & F MS Flange of following size including Bolts ,Nuts, gasket etc and taking down old corroded flanges all as directed.

MS flange of size 50 mm dia

MS flange of size 80 mm dia

MS flange of size 100 mm dia

MS flange of size 150 mm dia

Material & Labour for Painting of MS pipe by Cleaning with wire brush and painting with one coat of metal primer and two coats of oil paint all as directed.

Taking down the Centrifugal pump set, 3 phase, 415 volts, 50 Hz (Condenser & Chilled water re-circulating pump set) from MS frame structural support for servicing /overhauling including replacing unserviceable Bush & bearings, gland packing, studs, gasket etc including machining work to shaft, reassembIing the pump set, painting with two coats of synthetic enamel paint including Transporting, erecting, testing and commissioning complete all as specified and directed for the following capacities

Servicing / Overhauling of pump set of capacity 15 HP

Servicing / Overhauling of pump set of capacity 10 HP

Servicing / Overhauling of pump set of capacity 3 to 5 HP

Taking down the condenser/chiller water recirculating pumpset along with MS frame from the existing foundation. Supply, fabricate MS frame of same type and size as per existing specification including welding and fixing, painting with two coats of synthetic enamel paint, connecting inlet & Outlet, electrical connections of pump etc for smooth functioning including brick work for foundation if required.

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 including Transporting and Testing by running complete for the following capacities

Rewinding of motor of capacity 3 to 5 HP

Rewinding of motor of capacity 7.5 HP

Rewinding of motor of capacity 10 HP

Rewinding of motor of capacity 15 HP

Supply & Replace the MS lov - joy (Male & Female) coupling of size up to 150 mm complete with star rubber disc as per sample for condenser recirculating pump & chilled water pump

Supply & Replace the star nylon disc for lov - joy of size up to 150 mm as per sample for condenser recirculating pump & chilled water pump

Supply & Replace the Rubber lov - joy (Male & Female) coupling of below mentioned size required at site for condenser water pump & chilled water pump including removal of old MS / Rubber Lov -Joy coupling and grinding work for matching with existing size.

Rubber Lov-Joy coupling of size 150 mm

Rubber Lov-Joy coupling of size 110 mm

Rubber Lov-Joy coupling of size 100 mm

M&L for servicing and cleaning of water strainer/ NRV of size up to 150 mm with chemical for removing all dust particles, scales and unwanted materials all as directed.

Supply and fix Expansion valve suitable for following capacity central AC plant including taking down old unserviceable one all as directed

Expansion valve of Central AC Plant of Screw Compressor unit of capacity 110 TR

Expansion valve of Central AC Plant of Scroll Compressor unit of capacity 12.5 TR

S&F Filter Drier/Strainer suitable for Central AC for the following capacity including taking down old unserviceable one all as directed.

Filter Drier/Strainer of Central AC Plant of Screw Compressor unit of capacity 110 TR

Filter Drier/Strainer of Central AC Plant of Scroll Compressor unit of capacity 12.5 TR

Supply only Compressor oil (grade as per manufacturer recommendation)

Supply only Refrigerant gas as following

Supply only Refrigerant gas R-134 A

Supply only Refrigerant gas R-407 C

Material and labour for taking down the burntout / defective Scroll type compressor from 12.5 TR unit and replace with factory made compressor, testing and commissioning complete all as specified and directed. Note :- (i) Leak test , Vacuuming & Refrigerant gas shall be measured separately under relavant items. (ii) compressor under one year warranty is contractor's responsibility

Material & 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 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.

Servicing of Air Handling Unit (AHU) of 30,000 CFM capacity, forming part of the central air-conditioning plant of total capacity 3 × 110 TR

Servicing of Air Handling Unit (AHU) of 26,000 CFM capacity, forming part of the central air-conditioning plant of total capacity 3 × 38 TR

Servicing of AHU of capacity 20,000 CFM of Central AC plant of capacity 03 x 25TR

M&L including removing, taking down old unserviceable Pulley of AHU motor and fix with new Pulley of any capacity all as directed.

M&L for dismantling and removing the unserviceable Thrust bearings from the Air Handling Units of the central type A/C plants and replacing with new Thrust bearing of same type / model , assembling back , reinstalling, connecting and testing complete all as directed.

M&L for arresting water leakage from centrifugal Pump of any capacity by replacing oil seal or gland rope all as directed. Note:- Once water leakage arrested from any pump set, any water leakage obtained within one month contractor shall be rectify the leak without any cost

Supply and replace Air / Pressure release valve made with brass all as directed.

Supply and replace Thermostat switch with sensor all as directed.

Supply and replace Oil pressure cutout all as directed all as directed.

Supply and replace Water pressure cutout all as directed.

Supply and replace Pressure gauge/Temperature gauge glycerin type made of stainless steel body.

Supply & replace Temperature sensor with wiring kit for water entering & leaving from condenser / chiller / AHU room of A/C plant

Supply and replace Single phase preventer unit 415 V,3Ph all as directed.

Supply & Replace HP /LP pressure switch with all accessories all as directed.

Supply & Replace Water flow switch with all accessories all as directed.

M & L for Replacement of unserviceable parts in control panel board (PCB) and servicing and rectifying the fault for the following capacity AC plant all as directed.

Servicing of PCB for Central AC Plant of capacity 110 TR

Servicing of PCB for Central AC Plant of capacity 38 TR

Servicing of PCB for Central AC Plant of capacity 25 TR

Supply and replace Microprocessing unit control panel board PCB set with display and all connected accessories as per recommendation of manufacturer for functioning of Central Air conditioning plant of following Capacity

PCB for Central AC Plant of capacity 110 TR

PCB for Central AC Plant of capacity 38 TR

PCB for Central AC Plant of capacity 25 TR

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

Contactor Set for 3 pole contactor AC3, 140 A, 02 NO+02 NC as existing.

Contactor Set for 3 pole contactor AC3, 110 A, 02 NO+02 NC as existing.

Contactor Set for 3 pole contactor AC, 70 A, 02 NO+02 NC as existing.

Contactor set for 3 pole AC,415V, 32 Amps 02 NO+02 NCas existing.

Contactor set for 3 pole AC,415V, 25 Amps 02 NO+02 NCas existing.

Contactor set for 3 pole AC,415V, 18 Amps 02 NO+02 NCas existing.

Over load relay (direct mounting) of Range 63 - 80 Amps Make:

Over load relay (direct mounting) of Range 100 - 160 Amps Make:

Timer electronic, 3-60 Sec, 230-400 V AC, 50 Hz.

Switch Fuse unit 3 Pole, 200 A, 400 V AC.

Supply and replace Air filter 5 Micron of size 1.2 mtr x 1.2 mtr washable type suitable for AHU of Central Air conditioning plant all as directed.

Supply and replace Compressor oil level sensor switch with all accessories for chiller unit of central AC plant of capacity 110 TR all as directed.

Supply and replace MVPD unit of central AC plant all as directed.

Supply and replacement of MCCB, adjustable type of following capacity/specification ,440V, 50 Hz, with extended terminal & spreader link.

MCCB 4 pole, 36 KA, 250 Amp

MCCB 4 pole, 36 KA, 200 Amp

MCCB 4 pole, 36 KA, 160 Amp

MCCB 4 pole, 16 KA, 63 Amp

MCCB 4 pole, 16 KA, 40 Amp

Material & Labour for Servicing and cleaning of following cooling towers of central type A/ C including taking down and cleaning of fills with water and refixing in original position and applying one coat of synthetic enamel paint same as old 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.

Servicing of Cooling tower of capacity 160 TR

Servicing of Cooling tower of capacity 150 TR

Servicing of Cooling tower of capacity 100 TR

Supply and replacement of Fills for cooling tower suitable for Central AC Plant complete all as specified and directed.

Supply and replacement of Sprinkler assembly for cooling tower suitable for up to 160 TR capacity complete all as specified and directed.

Supply and replacement of PVC Branch pipe and Drift eliminators assembly for cooling tower suitable for up to 160 TR capacity complete all as specified and directed.

Supply and replacement of new Fan Blade assembly with blade fixing Hub from the existing cooling tower capacity up to 160 TR of the central type AC plant all as specified and as directed.

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

Supply & replacement of PVC Float valve suitable for cooling tower and makeup water tank as per the sample all as directed

Supply and fixing of Nitrile rubber insulation with with Aluminium cladding on Chiller pipe line of any size including removal of old damaged insulation all as directed.

Material and labour for MS frame work including fabrication 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 directed.

rc enterprises (BID ID -3491480)

RK ENTERPRISES (BID ID -3491552)

C SRINIVASAN (BID ID -3497405)

SRI VENKATESWARA ENTERPRISES (BID ID -3491930)