PERIODICAL MAINTENANCE OF REPAIR OF DUCTABLE AC PLANTS AND ALLIED WORKS AT NAVAL DOCKYARD VISAKHAPATNAM UNDER GE (I) (DM) VISAKHAPATNAM

Amount

Material and labour for cleaning of air duct of any size as per plant ducts length including ducts filter and repairing/replacement / tighting existing sizes nuts, bolts, packing material etc., by brush, cleaning agents complete all as specified and directed.

Material and labour for cleaning of air defuser and repairing/ replacement / tighting existing sizes nuts, bolts, packing material etc., by using brush, cleaning agents complete all as specified and directed.

Material and labour for repairs and overhauling of blower motor of ductable AC plant upto 1.5HP capacity by disconnecting and taking out from the bed, replacement of worn out bush/ball bearing, lugs, studs, bolts etc., re-installing in it's original position including painting the motor body with one coat of synthetic enamel paint, connecting up, testing all as specified and directed.

Taking out unserviceable remote assembly with senser from indoor unit of ductable AC unit, supply and fix new remote assembly with senser suitable of 7.5 TR ductable AC unit complete control wiring, checking, correcting all specified and directed. Make : Carrier/Voltas/Blue star

Taking out unserviceable fan blade from outdoor unit of ductable AC unit, supply and fix new fan blade suitable for & upto 8.5 TR AC unit, checking, correcting alignment of fan motor, tightening of loose nuts, bolts, etc., testing and commissioning all as specified and directed. Make :- Carrier/Voltas/Blue star

Supply and charging of R-22 gas all as directed Make:- Refron 22/Floron 22/Mafron 22

Supply & fix suction gas temperature tranduger (LP) upto 8.5 TR ductable AC plant (Make - Carrier) including taking down unserviceable and required brazing work complete all as specified and directed.

M&L for painting of outer surface of multiple section of complete LT Panel board size up to 5.5m x 3.2m in one substation comprising ACBs/MCCBs/SDFs ,busbar chamber, swich gear chamber, metering chamber cable termination/tray using one coat of synthetic enamel paint after preparation of surface, providing protection cover to all metering equipment, panel meters, switchgears, cleaning of all meters and switch gears complete all as specified and as directed.

Material and labour for complete checking, servicing / rectification of electrical circuits for all units and control wiring showing phase sequence with proper lugging of AC plant control panel including replacement of fused indication lamps with new ones, cleaning of all power contacts, rectification of minor defects in Ammeters and Voltmeters, testing and commissioning complete all as specified and as directed. Note :- Material such as indication lamp, ammeter, voltmeter will be measured and paid separately.

Material and labour for taking out unserviceable condensor from ducatble type unit 7.5 TR capacity by disconnecting all electrical connection refrigerant lines condenser water pipe lines and supply & fixing new condensor aircooled type and making all connections, electrical, refrigerant and condenser, water pipe lines, and pressure testing with nitrogen gas under constant pressure of 250 PSI for 24 hours, vaccumization, performance test and commissioning and charging the gas to unit making alignment complete all as specified and as directed. Make : Voltas/Carrier

All as per item No. 10.00 above but for 8.5 ton capacity.

Supply , fabricate and instalation of MS sheet enclosure made out of 2mm gauge MS sheet suitable for accommodating 5/7.5 TR capacity of ductable AC outdoor unit including painting with two coats of synthetic enamel paint over a coat of redoxide primer and taking out corroded MS Sheet enclosure complete all as specified and as diricted. Note :- 1. Unit rate quoted shall be deemed to include for providing ISMC & angle iron of size as existing for mounting the enclosure embedded in and including necessary brick work duly plastered and finished all as directed. 2. Electrical connection, refrigerant lines compressor, blower, condenser, water pipe lines and gas charging will be measured and paid for separately.

Supply and fix PVC mesh Air filters with MS frame suitable for 5 to 8.5 TR ductable AC plants including taking out old unserviceable filter all as specified and directed.

Material and labour for taking out unserviceable filter drier from ductable type AC unit 5 to 8.5 TR and fixing the same all as specified and directed Make:- Sporlon/Danfoss

M&L for repairs/maintenance of 5 to 8.5 TR ductable AC units by leak testing with N-2 gas under constant Pressure of 250 PSI (17 kg/cm2) after complete transfer of refrigerant gas from the entire system, rectification of leakage by cutting and brazing the refrigeration system wherever required, replacement Of “O” rings, teflon washers of valves, copper tubing, safety valves, flare nuts etc., neutralising after the Pressure holds, good for atleast 24 hours, vaccumization, charging the system with refrigerant Gas, performance test and commissioning complete all as specified and as directed. Note : Referigerant gas will be measured as supply only.

Material and labour for cleaning of evaporator coil with caustic soda neutralising with fresh water blowing with electric blower for package type AC unit and replacement of canvas cloth with Zip arrangement for jointing the duct as required at site, complete all as specified and as directed.

Supply and fix rubber insulating mat in front of LT panel board of size 5 mm thick, 1 M width up tp 3.3 KV, make RPG or equivalent as approved by GE.

Supply only indication lamps (LED type) red, yellow and blue in colours of 22.5 mm dia to monitor on LT panel board suitable for 240 V AC supply and taking down unserviceable indication lamps complete all as specified and as directed. Make:-Siemens/C&S/schneider/ABB

Material & labour for taking down unserviceable burnt compressor, supply and fix new sealed scroll compressor suitable for 7.5 TR ductable units all as specified and directed.

Material & labour for taking down unserviceable burnt compressor, supply and fix new sealed scroll compressor suitable for 5.5 TR water cooled package units all as specified and directed.

Material & labour for taking down unserviceable burnt compressor, supply and fix new sealed scroll compressor suitable for 8.5 TR ductable units all as specified and directed.

Supply and fix remote assembly with senser from indoor unit of ductable AC unit, suitable for 8.5 TR ductable AC unit complete with control wiring, checking, correcting complete all as specified and as directed including taking down the old assembly.

Supply and fix MS angle iron, flats, cut to required length, making necessary shape, screw holes fixing with necessary electric welding, painting one coat of red oxide and two coats of synthetic enamel paint to all sides of steel members including dismantling and taking down the unserviceable one all as specified and directed.

Material and labour for disconnecting, taking out the blower motor of ductable AC plant upto 1.5 HP capacity from the bed, tranportation to workshop and removing the existing winding and rewinding with new super enameled copper wire of same gauge and same number of turns after thorough cleaning of stator body and rotor applying insulating varnish, drying up by heating for improving ohmic valve, reassembling the motor by replacement of both end bearings, including painting with one coat of synthetic enamel paint, reinstalling on its original position connecting up, testing all as specified and directed.

Supply & fix suction gas temperature tranduger (HP) upto 8.5 TR ductable AC plant (Make - Carrier) including taking down unserviceable and required brazing work complete all as specified and directed.

Material & labour for PCC (1:2:4), type B1 (using 20 mm graded stone aggregate) as in foundation filling, repairs to damaged floors including necessary form work and finishing the exposed surfaces of concrete fair and even complete all as specified and directed.

Supply and fix MCCB of 32 Amps, 3 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T

Supply and fix Power contactor 32 Amps, 3 pole, 415 V complete all as specified and directed. Make - Indo Asian/Havells/L&T/ABB/Schneider

Material and labour for dismantling compresor, condenser, fan motor of outdoor unit and removing gas for replacement of bottom plate. Reassembling all the spares and recharging the gas complete all as specified and directed. Note : Rates inclusive of gas charging and necessary tinkering/brazing.

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VENKATESWARA TECHNOLOGY

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