81467 REPAIR AND MAINTENANCE OF AC PLANT AT PARUNDU UNDER GE TIRUNELVELI

SCHEDULE 'A'

Material & Labour for leak test and gas charging by vacuumising complete system of Central type AC plant of following capacity 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 & hold up to 24 hrs and rectifying the leakage if any by bracing/welding/ replacing the "O" ring & Gland packing of service valve including top up the compressor oil and charging the refrigerant gas upto desired pressure all as specified , instructed & directed. Note :- i) Once the Gas is charged in system, it should hold in the system for a minimum period of 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 items 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 compressor of complete unit shall be considered as one job.

Leak test and gas charging of Central AC Plant scroll Compressor unit of capacity 13 TR

Material & Labour for Descaling the Condenser unit of Central type AC plant of following capacity full system by circulating descaling chemical with water (min 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 26 TR full system

Material & Labour for Descaling the chiller units of Central type AC plant of capacity 26 TR full system by circulating descaling chemical with water (min 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 :- Descaling to be carried out twice in the entire contract period and Each job will be measured and paid separately.

Material & Labour for dismantling unserviceable / wornout "V" belts of size B-124, supply and fix new "V" Belt of size B-124 and testing complete all as specified and directed .

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 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 sizes with replacement of bolts , nuts , washers and rubber gaskets including dismantling of old unserviceable NRV all as directed.

NRV of size 100 mm bore

NRV of size 80 mm bore

NRV of size 50 mm bore

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

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 50 mm dia

MS pipe of size 80 mm dia

MS pipe of size 100 mm dia

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

MS flange of size 50 mm dia

MS flange of size 80 mm dia

MS flange size 100 mm dia

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

Taking down Centrifugal pump set, 3 phase, 415 volts, 50 Hz (Condenser & Chilled water re-circulating pump set) including MS frame structural support for servicing /overhauling by replacing unserviceable Bush & bearings, gland packing , studs, gasket etc including machining work to shaft, reassembing the pump set and 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 5 to 7.5HP

Taking down 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 all as specified and directed.

Taking down 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, complete for the following capacitie

Rewinding of motor of capacity 12. 5 HP

Supply & Replacing the MS lov - joy (Male & Female) coupling of size up to 80 mm complete with star rubber disc as per sample for condenser recirculating pump & chilled water pump all as specified and directed.

Supply & Replace the star nylon disc for lov - joy of size up to 80 mm as per sample for condenser recirculating pump & chilled water pump all as specified and directed.

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 all as specified and directed.

Rubber Lov-Joy coupling of size 80 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 specified and directed.

Supply and fix Expansion valve suitable for following capacity central AC plant.

Expansion valve of Central AC Plant of scroll Compressor unit of capacity 13 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 scroll Compressor unit of capacity 13 TR

Supply only Compressor oil (grade as per manufacturer recommendation)

Supply only Refrigerant gas R-22

Note for item No. 21 and 22:- Labour charge is deemed to be included in the quoted rate of relevant repair items

Material and labour for taking down the burntout / defective Scroll type compressor from 13 TR unit and replace the factory made compressor, testing and commissioning complete all as specified and directed. Note :- (i) Leak test , Vacuuming & Refrigerant gas shall be measured separately under relevant 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 AHU of capacity 20,000 CFM of central AC plant of capacity 3 X 26 TR

M&L for taking down old unserviceable Pulley of AHU motor and fix with new Pulley of any capacity AHU motors.

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

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

Supply and replace Thermostat switch with sensor.

Supply and replace Oil pressure cutout.

Supply and replace Water pressure cutout.

Supply and replace Pressure gauge/Temperature gauge glycerin type made of stailess 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.

Supply & replace HP /LP pressure switch with all accessories.

Supply & replace Water flow switch with all accessories.

M & L for Replacement of unserviceable parts in control panel board (PCB) and servicing and rectifying the fault for the AC plant of capacity 26 TR all as specified and directed.

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 Capacity 26 TR all as specified and directed.

Taking down the defective hot water generator and dismantling for servicing /overhauling including replacing unserviceable accessories, and re-erecting including all connections and 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, 110 A, 02 NO+02 NC as existing.

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

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

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

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

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

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 of MVPD unit of central AC plant

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 including one coat of synthetic enamel painting of 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.

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 100 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 100 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 100 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 specified and directed.

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

Material and labour for MS frame work 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 all as specified and as directed.

Schedule of credit amount brought back from Ser Page No.37 - Rs. 20219.00 will be deducted from the above quoted amount to derive the contract sum. SIGNATURE OF CONTRACTOR