COMPREHENSIVE MAINTENANCE OF DUCTABLE AC PLANTS AND IMPROVEMENT REPAIR REPLACEMENT OF UNSV SPARE PARTS AND ALLIED WORKS AT NAVAL DOCKYARD VISAKHAPATNAM UNDER GE (I) DM VISAKHAPATNAM

(c) Carrying out leak test with soap solution in case reports indicate frequent loss/recharging of refrigerant into the system whenever required (d) Checking operation ,suction& discharge pressures.In case of any abnormality identifying and correcting the same (e) Checking and setting of safety controls such as HP/LP cutouts,overload protections and thermostats etc. (f) Cleaning of pre air filters,evaparator coils and replacing the same if necessary (g) Checking lubricating oil level at the sight glass if found below the normal level the problem shall be analyzed and rectified. (h) Running of standby unit and observe for satisfactory performance. (i) Checking the incoming voltage and running currents and take appropriate measures (j) checking for any abnormal noise/vibration from moving parts such as compressors,motors,fans etc in case of any abnormality,investigating and correcting the same. (k) Checking and rectifying any water leaks and arresting them

All as per item No. 1.00 above, but 7.5 TR x 4 Nos. installed at 62 bldg.

All as per item No. 1.00 above, but 8.5 TR x 3 Nos. installed at 17 MAT.

All as per item No. 1.00 above, but 5.5 TR x 2 Nos. instaled at 15 SAX.

All as per item No. 1.00 above, but 5.5 TR x 2 Nos. instaled at 25A bldg.

All as per item No. 1.00 above, but 16 TR x 3 Nos. instaled at 20 mout bldg.

All as per item No. 1.00 above, but 60 TR x 3 Nos. instaled at 25D bldg.

Supply only HMI display board with micro processor controller touch pad for air cooled package type ac plant suitable at site all as specified and directed.

Supply only NRCP board for air cooled package type ac plant suitable at site all as specified and directed.

Supply only EXV board suitablefor air cooled package type ac plant suitable at site all as specified and directed.

Supply only suction gas temperature tranduger (LP) for air cooled package type ac plant suitable at site all as specified and directed.

Supply only discharge gas temperature tranduger (HP) for air cooled package type ac plant suitable at site all as specified and directed.

Supply only entering/leaving water temperature sensor for air cooled package type ac plant suitable at site all specified and directed.

Supply only outside temperature sensorfor air cooled package type ac plant suitable at site all as specified and directed.

Supply only HP switch for air cooled package type ac plant suitable at site all as specified and directed.

Supply only LP switch for air cooled package type ac plant suitable at site all as specified and directed.

Supply only sub cooler sensor for air cooled package type ac plant suitable at site all as specified and directed.

Supply only electronic expansion valve suitable for air cooled package type ac plant suitable at site testing complete all as specified and directed

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 diffuser in plant and repairing/ replacement / tighting existing sizes nuts, bolts, packing material etc., by using brush, cleaning agents complete all as specified and directed.

Supply only fan blade suitable for outdoor of ductable AC unit upto 8.5 tr complete all as specified and directed

Supply only suction gas temperature tranduger (HP) suitable at site upto 8.5 TR ductable AC plant complete all as specified and directed.

Supply only suction gas temperature tranducer (LP) suitable at site upto 8.5 TR ductable AC plant complete all as specified and directed.

Supply only condensor aircooled type suitable at site upto 8.5 TR ductable AC plant complete all as specified and directed.

Supply only filter drier suitable at site for ductable type AC plant upto 8.5 TR all as specified and directed

Material & labour for taking down unserviceable burnt compressor, supply and fix install and testing and commissioning of new sealed scroll compressor suitable at site upto 8.5 TR ductable unit scomplete all as specified and directed.

Supply of R-22 gas 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 sensor from indoor unit of ductable AC unit, supply and fix new remote assembly with senser suitable for ductable AC unit of any size complete control wiring, checking, correcting all specified and directed.

M&L for painting of outer surface of multiple section of complete LT Panel board of any size 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 all as specified and directed.

Supply only MCCB of 32 Amps, 3 pole, 36 KA, AC supply 50Hz, 415 V complete all as specified and directed.

Supply only Power contactor 32 Amps, 3 pole, 415 V complete all as specified and directed.

Supply and fix rubber insulating mat in front of LT panel board of size 3 mm thick, 1 m width up tp 3.3 KV all as specified and directed. 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 all as specified and directed.

Supply , fabricate and installation of MS sheet enclosure made out of not less than 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 all as specified and diricted. Note :- (a) 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. (b) 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.

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 all as specified and directed. Note : Referigerant gas will be measured as supply only.

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

Supply and fix MS angle iron, flats, cut to required length, making necessary shape/ladders, 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 unsv one complete 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.

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.

Material and labour for painting the outdoor with one coat of red oxide and two coats of synthetic enamel paint to all sides after preparation of surface complete all as specified and directed

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