REPAIRS / MAINTENANCE OF CENTRAL TYPE AC PLANT AT MH AND OTA UNDER GE STM CHENNAI

Amount

M&L for descaling of condensor unit and connected pipe lines of 2 x 75 TR central AC plant by circulating dilute hydrochloric acid solution and cleaning the tube throughly with wire brush by removing the side cover and recirculating the fresh water after fixing the side cover with necessary gasket and bolts and nuts complete all as specified and as directed.

M&L for descaling of condensor unit and connected pipe lines of 3x 100 TR central AC plant by circulating dilute hydrochloric acid solution and cleaning the tube throughly with wire brush by removing the side cover and recirculating the fresh water after fixing the side cover with necessary gasket and bolts and nuts complete all as specified and as directed.

M&L for descaling of condensor unit and connected pipe lines of 3x 120 TR central AC plant by circulating dilute hydrochloric acid solution and cleaning the tube throughly with wire brush by removing the side cover and recirculating the fresh water after fixing the side cover with necessary gasket and bolts and nuts complete all as specified and as directed.

M&L for checking the leakages of entire refrigerant system like flare joints, valve glands using leak detection deivices and soap solution and halide torch or electronic leak detector and arresting the leaks by welding, bracing works, binding with teflon tape as required at site and topping up the gas for required suction and discharge pressure of central AC plant 75 TR / 100 TR / 120 TR complete all as specified and as directed.NOTE: Refrigerant gas shall be measured and paid separately under relevant item.

M&L for vacuumising of central AC plant 75 TR / 100 TR / 120 TR using vacuum pump upto - 30 PSIG pressure and hold the same vacuum pressure upto 24 hours including necessary welding and bracing if required complete all as specified and as directed.

M&L for Leakage testing of central AC plant 75 TR / 100 TR / 120 TR using vacuum pump upto 300 PSIG pressure and hold the same vacuum pressure upto 24 hours including necessary welding and bracing if required complete all as specified and as directed.

Supply and charging / topping up the refrigerant gas R-22 into the system and testing as per standard procedure of central AC plant 75 TR / 120 TR complete all as specified and as directed.

Supply and charging / topping up the refrigerant gas R-134A into the system and testing as per standard procedure of central AC plant 100 TR complete all as specified and as directed.

S&F in repairs gun metal nozzle of suitable size for cooling towers of capacity 240 TR / 200 TR / 75 TR complete all as specified and as directed.

S& in repairs filter 75 C for drier of central AC plant 75 TR / 120 TR complete all as specified and as directed. Make : ALCO Model No. D-48

S&F in repairs water pressure cut out type RC-61, MWP 150 PSIG, 250 Volts, AC, 15 Amps complete all as specified and as directed. Make : Indfoss

M&L for cleaning the compressor unit after draining out old compressor oil, overhauling / unloading system, refilling with new compressor oil to the required level including replacement of oil filter element and testing as per standard procedure complete all as specified and as directed.

S&F in repairs actuator 3 way solenoid valve complete all as specified and as directed.Make:SANLAN

S&F in repairs pilot control valve with drier SWP 500, MOP D 275, QC 155 complete all as specified and as directed.Make:SPORLAN

S&F in repairs low pressure, high pressure cut out complete all as specified and as directed.Make:Danfoss

S&F in repairs oil pressure cut out as in repairs complete all as specified and as directed.Make:Danfoss

S&F in repairs industrial type pressure gauge with gun metal / brass valves adequately suppoted as per specifications complete all as specified and as directed.

S&F in repairs chilled Water NRV suitable for existing plant as per specifications complete all as specified and as directed.

S&F in repairs temperature sensor/ Transmittor suitable for Central AC plant MCS -100 complete all as specified and as directed.

S&F in repairs pressure sensor/ Transmitor suitable for Central AC plant complete all as specified and as directed.

S&F in repairs digital Thermometer with Humdity meter specifications complete all as specified and as directed.

M&L for dismantling of cooling tower service panel, draining out water completely, cleaning of haney comb fills (drift eliminators), nozzles etc., by caustic soda and wire brush, cleaning of cooling tower tank by removing all algae from the basin, cleaning the GI pipes by removing the sediments, cleaning of sump suction filter - 01 No and pump side filter strainers - 2 Nos for cooling tower of capacity 240 TR complete all as specified and as directed.

M&L for dismantling of cooling tower service panel, draining out water completely, cleaning of haney comb fills (drift eliminators), nozzles etc., by caustic soda and wire brush, cleaning of cooling tower tank by removing all algae from the basin, cleaning the GI pipes by removing the sediments, cleaning of sump suction filter - 01 No and pump side filter strainers - 2 Nos for cooling tower of capacity 200 TR complete all as specified and as directed.

M&L for dismantling of cooling tower service panel, draining out water completely, cleaning of haney comb fills (drift eliminators), nozzles etc., by caustic soda and wire brush, cleaning of cooling tower tank by removing all algae from the basin, cleaning the GI pipes by removing the sediments, cleaning of sump suction filter - 01 No and pump side filter strainers - 2 Nos for cooling tower of capacity 75 TR complete all as specified and as directed.

S&F in repairs PVC honey comb fills (drift eliminators) of suitable size for cooling tower of capacity 75 TR / 200 TR / 240 TR complete all as specified and as directed.

S&F rectangular / round ducting, fabricated from GSS sheet metal, 24 gauge, including neoprene rubber gaskets, insulation of resin bonded glass wool 25mm thick, of density 32 kg / cum, 25mm x 25mm x 1.25mm, GI sections complete all as specified and as directed.

S&F plain galvanised iron sheet, 24 gauge, inside of AHU including necessary welding / bracing complete all as specified and as directed.

M&L for dismantling, overhauling AHU assembly complete as specified below including testing complete all as specified and as directed

(a) Inspection of absolute filters, remove and cleaning vacuum cleaners and refix back in place,

(b) Clean cooling coil, fins by using caustic soda and water pressure method, applying grease for all motors, check and adjust belt tension as required, check condition of blower shaft, scroll, impeller and bearings, check tightness of all electrical terminations, clear water line strainers, check proper balancing system, check for noise and vibration.

(c) Check healthy operation of controls and safety devices.

S&F SPA "V" belts suitable for AHUs of 150 TR, 200 TR and 240 TR capacity AC plants complete all as specified and as directed.

S&F bearing suitable for AHU blower and motor for 75 TR / 200 TR / 240 TR capacity AC plants complete all as specified and as directed.

S&F limit switch Type-LSR with diecast cover with roller lever for AHU door complete all as specified and as directed.

S&F in repairs environmental friendly, ultra modern, energy saving, surface mounted, decorative hexagon bulk head Back-lit LED luminaire, 10 W comprising of high brightness LEDs fixed on AHU including necessary connection complete all as specified and as directed.Make : Havells Cat No.HEXA FT10WLED 857SSYMBOPC or other equivalent make as approved by GE

M&L for servicing of LT AC plant panel board of any size including connected AHU starter panels and wirings, cleaning of panel board internally and externally, tightening all screws and nuts and bolt, replacing minor parts like screws, washers, lugs etc, checking the serviceability of all switchgears complete all as specified and as directed.Note:Switchgear shall be measured and paid separately under relevant item.

S&F Electronic timer 240 V, 50 Hz, 3-30 sec for star delta starter complete all as specified and as directed.

S&F MNX 18 W contactor assembly, AC - 3, 415 V, 16 Amps complete all as specified and as directed.

S&F MNX 25 W contactor assembly, AC - 3, 415 V, 25 Amps complete all as specified and as directed.

S&F MNX 40 W contactor assembly, AC - 3, 415 V, 40 Amps complete all as specified and as directed.

S&F Contactor combination (Relay) 2 NO + 2 NC, 415 V, 10 Amps complete all as specified and as directed.

S&F MCB 40 Amps, TPN, 240 Volts, 50 Hz, AC supply, "C" curve, with breaking capacity of 10 kA complete all as specified and as directed.

S&F in repairs MCCB 100 Amps, 3 pole, 415 Volts, 3 phase, 50 Hz, 16 kA breaking capacity, with fixed thermal and fixed magnetic setting with protection for overload and short circuit and conforming to IEC60947 / IS 13947 (Pt-II) 1993 (Latest version) and with Ics = 75% of Icu having spreader links and barriers as standard feature of manufacturer complete all as specified and as directed.

S&F in repairs MCCB 160 Amps, 3 pole, 415 Volts, 3 phase, 50 Hz, 25 kA breaking capacity, with fixed thermal and fixed magnetic setting with protection for overload and short circuit and conforming to IEC60947 / IS 13947 (Pt-II) 1993 (Latest version) and with Ics = 75% of Icu having spreader links and barriers as standard feature of manufacturer complete all as specified and as directed.

S&F in repairs MCCB 250 Amps, 3 pole, 415 Volts, 3 phase, 50 Hz, 35 kA breaking capacity, with fixed thermal and fixed magnetic setting with protection for overload and short circuit and conforming to IEC60947 / IS 13947 (Pt-II) 1993 (Latest version) and with Ics =100% of Icu having spreader links and barriers as standard feature of manufacturer complete all as specified and as directed.

S&F in repairs MCCB 400 Amps, 3 pole, 415 Volts, 3 phase, 50 Hz, 50 kA breaking capacity, with adjustable thermal and adjustable magnetic setting with protection for overload and short circuit and conforming to IEC60947 / IS 13947 (Pt-II) 1993 (Latest version) and with Ics =75% of Icu having spreader links and barriers as standard feature of manufacturer complete all as specified and as directed.

S&F in repairs MCCB 800 Amps, 3 pole, 415 Volts, 3 phase, 50 Hz, 50 kA breaking capacity, with adjustable thermal and adjustable magnetic setting with protection for overload and short circuit and conforming to IEC60947 / IS 13947 (Pt-II) 1993 (Latest version) and with Ics =50% of Icu having spreader links and barriers as standard feature of manufacturer complete all as specified and as directed.

S&F in repairs standard universal LED indicators, of colour RYB complete all as specified and as directed.

S&F in repairs Automatic power factor control unit, 230 V, 8 steps complete all as specified and as directed.

S&F in repairs Power capacitors, 415 V, 50 Hz, 10 kVAR, 3 Phase complete all as specified and as directed.

S&F in repais Power capacitors, 415 V, 50 Hz, 5 kVAR, 3 Phase complete all as specified and as directed.

S&F in repairs PVC insulated copper wire, single core, 6 sqmm, 1100 Volts complete all as specified and as directed.

S&F in repairs MCB, single pole, 6-32 A, 230 Volts, 10 kA, "C" series complete all as specified and as directed.

S&F in repairs MCB, triple pole, 6-32 A, 230 Volts, 10 kA, "C" series complete all as specified and as directed.

S&F in repairs single phase preventor complete all as specified and as directed.

M&L for disconnecting from base plate and transporting the pumpsets with motor or AHU blower motor from site to workshop for repairs and and return back to site, fixing the pump and motor on base plate, coupling the motor and pump as required, connecting the suction pipe and delivery pipe lines, connecting to electric supply and testing and commissioning inclusive of providing new mild steel nuts and bolts as required complete all as specified and as directed. Note:Repairs required for the motors and pumps shall be measured and paid separately under relevant item.

M&L for dismantling mono block pump motor of 20 HP capacity , rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of worn out bush, bearing, shaft metalling / grinding, reassembling including testing complete all as specified and as directed.

M&L for dismantling mono block pump motor of 15 HP capacity , rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of worn out bush, bearing, shaft metalling / grinding, reassembling including testing complete all as specified and as directed.

M&L for dismantling mono block pump motor of 12.5 HP capacity , rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of worn out bush, bearing, shaft metalling / grinding, reassembling including testing complete all as specified and as directed.

M&L for dismantling induction motor of AHU / cooling tower of 15 HP capacity rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of worn out bush, bearing, shaft metalling / grinding, reassembling including testing complete all as specified and as directed.

M&L for dismantling induction motor of AHU / cooling tower of 12.5 HP capacity rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of worn out bush, bearing, shaft metalling / grinding, reassembling including testing complete all as specified and as directed.

M&L for dismantling induction motor of AHU / cooling tower of 10 HP capacity rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of worn out bush, bearing, shaft metalling / grinding, reassembling including testing complete all as specified and as directed.

M&L for dismantling induction motor of AHU / cooling tower of 7.5 HP capacity rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of worn out bush, bearing, shaft metalling / grinding, reassembling including testing complete all as specified and as directed.

M&L for dismantling induction motor of AHU / cooling tower of 1.5 to 5 HP capacity rewinding with super enamelled copper winding of appropriate gauge and quality and insulated with varnish after removal of burnt out winding from slots with emery paper, including replacement of worn out bush, bearing, shaft metalling / grinding, reassembling including testing complete all as specified and as directed.

M&L for dismantling mono block pumpset with motor / induction motor of AHU / cooling tower of 10HP to 20 HP capacity , of any make, servicing by overhauling, cleaning, greasing, lubricating, replacing wornout spares, reassembling including testing complete all as specified and as directed.

Note for ser. Item No 53 to 62 :Spares as required shall be measured and paid separately under relevant items

Supply only ball bearing as per existing complete all as specified and as directed.

Supply only bearing sleeve as per existing complete all as specified and as directed.

Supply only pulley bearing for AHU as per existing complete all as specified and as directed.

Supply only motor bearing for AHU as per existing complete all as specified and as directed.

Supply only temperature sensor as per existing complete all as specified and as directed.

Supply only temperature transmittor as per existing complete all as specified and as directed.

Supply only terminal connector any size any capacity as per existing complete all as specified and as directed.

Supply only mild steel metal shaft as per existing complete all as specified and as directed.

Supply only gasket suitable for any size and capacity as per existing complete all as specified and as directed.

Supply only cast iron impeller with nuts of suitable size as per existing complete all as specified and as directed.

Supply only gland rope (graphite rope) 1/4" size, 1/2" size and 3/4" size any capacity complete all as specified and as directed.

Supply only mild steel bolts, nuts and washers with suitable flange any size any capacity complete all as specified and as directed.

Supply only mild steel foundation bolts, nuts and washers with any size any capacity complete all as specified and as directed.

M&L for dismantling mono block pumpset with motor / induction motor of AHU / cooling tower, of 1.5 HP to 7.5 HP capacity of any make, servicing by overhauling, cleaning, greasing, lubricating, replacing wornout spares, reassembling including testing complete all as specified and as directed.Note:Spares as required shall be measured and paid separately under relevant items.

Supply only ball bearing of suitable size as per existing complete all as specified and as directed.

Supply only bearing sleeve as per exisiting complete all as specified and as directed.

Supply only terminal connector any size any capacity as per existing complete all as specified and as directed.

Supply only mild steel metal shaft as per existing complete all as specified and as directed.

Supply only gasket suitable for any size and capacity as per existing complete all as specified and as directed.

Supply only cast iron impeller with nuts of suitable size as per existing complete all as specified and as directed.

Supply only AHU Belt of suitable size as per existing of any make complete all as specified and as directed.

Supply only mild steel foundation bolts, nuts and washers with any size any capacity complete all as specified and as directed.

S&F in repairs Butterfly valve, wafer type, Class PN 1.6, with SG iron body and disc, suitable for 150mm bore of pipe with necessary fixing arrangements such as fasteners, nitriles or EDPM rubber lining, stainless steel pins, ring, bolts and nuts etc complete all as specified and as directed.

S&F in repairs volume control dampers of GI construction, lever operated including accessories etc., as required complete all as specified and as directed.

S&F Canvas cloth on duct with provision of zips for both inlet and outlet of AHU complete all as specified and as directed.

S&F in repairs Balancing valve with built in measuring facility with cast iron body, Class PN 1.6 rating, flanged construction, with EDPM coated disc with long pitch protected out pipe insulation for chilled water circulation of size 100mm dia in the chilled / plumbing duly insulated to the same specifications as the connected pipeline and adequately supported complete all as specified and as directed.

S&F in repairs Balancing valve with built in measuring facility with cast iron body, Class PN 1.6 rating, flanged construction, with EDPM coated disc with long pitch protected out pipe insulation for chilled water circulation of size 40mm dia in the chilled / plumbing duly insulated to the same specifications as the connected pipeline and adequately supported complete all as specified and as directed.

M&L for Comprehensive maintenance / servicing of DG set of capacity 200 kVA, ( Engine coupled with alternator of Greaves Make) including servicing all parts and including change and providing engine oil to full quantity, change of coolant to required level, change of oil filter, fuel pre-filter, air filter, air cleaner safety element and consumables such as cotton waste, grease, cleaning liquids etc all as per manufacturers manual once in four months and attending breakdown as and when required complete all as specified and as directed.Note:work shall be carried out by authorised service provider of original Manufacturer

Supply only oil servicing kit for DG set of capacity 200 kVA, Greaves ( Engine coupled with alternator of Greaves Make) all as per manufacturers recommendation including supply of filters and engine oil complete all as specified and as directed. Note:work shall be carried out by authorised service provider of original Manufacturer

M&L for comprehensive maintenance / servicing of DG set of capacity 125 kVA, ( Engine coupled with alternator of Kirloskar Make) including servicing all parts including change of engine oil to full quantity, change of coolant to required level, change of oil filter, fuel pre-filter, air filter, air cleaner safety element and consumables such as cotton waste, grease, cleaning liquids etc all as per manufacturers manual once in four months and attending breakdown as and when required complete all as specified and as directed. Note:work shall be carried out by authorised service provider of original Manufacturer

Supply only oil servicing kit for DG set of capacity 125 kVA, ( Engine coupled with alternator of Kirloskar Make) as per manufacturers recommendation including supply of filters and engine oil complete all as specified and as directed. Note:work shall be carried out by authorised service provider of original Manufacturer

M&L for renewal of unserviceable lead acid rechargeable batteries with new 4 cell 12 Volts, 180 AH ,duly charged initially for Genset complete all as specified and as directed.

M&L for Batery charger Module 12V/24V for 30 KVA to 400 KVA for online charging of Batteries and necessary fixing arrangement as per the site requirement complete all as specified and as directed

Supply only distilled water suitable for DG sets batteries of any make & model.

M&L for earthing complete with galvanised iron earth plate electrode 600mm X 600mm X minimum 6mm thick, with and including earthing of 25mm x 4mm GI strip protected by 40mm dia GI pipe light grade upto a length of 7.5m. The plate shall be buried directly in ground vertically to a depth not less than 2.25 metres below ground level with top edge of the earth plate at a depth not less than 1.5 metres below ground level, connected to earth lead as described here-in-before by means of bolts, nuts, washers and checknuts made out of galvanised iron or mild steel, earthing lead protected by as described here-in-before and connected to main switch board or main control board or electric pole all as shown on electrical plate No.3 of MES Sch Part-I including necessary earth work and excavation in any type of soil, plain cement concrete 1:3:6, type C1 chamber, reinforced cement concrete cover slab with locking arrangement and handle of 10mm dia MS round bars 450mm long, 1:2:4 type B1, 50mm thick with 8mm dia TMT bars at 140mm centre to centre both ways, GI pipe of bore 20mm medium grade for watering with funnel, wiremesh, salt, charcoal, lugs including testing complete all as specified and as directed.

M&L for preparation of surface by removing dust, emery paper, tinkering, applying metal putty wherever necessary and painting with one coat of synthetic enamel paint of existing shade / colour on outer side of Chiller unit, Compressor unit of central AC plant 2 X 75 TR / 3 X 100 TR / 3 X 120 TR complete all as specified and as directed.

M&L for preparation of surface by removing dust, emery paper, tinkering, applying metal putty wherever necessary and painting with one coat of synthetic enamel paint of existing shade / colour of condensor pipe line of any size , inlet and outlet (length upto cooling tower basin) and chiller pump pipe line inlet and outlet (length upto plant room wall) including marking and numbering complete all as specified and as directed.

M&L for preparation of surface by removing dust, emery paper, tinkering, applying metal putty wherever necessary and painting with two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer of existing shade / colour on inner side and outer side of cooling tower of 75 TR / 200 TR / 240 TR capacity complete all as specified and as directed.

M&L for preparation of surface by removing dust, emery paper, tinkering, applying metal putty wherever necessary and painting with two coats of synthetic enamel paint existing shade / colour of mono block pumpset with motor / induction motor of AHU / cooling tower complete all as specified and as directed.

S&F in repairs wire netting of galvanised steel wire 0.91mm dia, size of mesh 12mm fixed with tinned tacks of wire staples complete all as specified and as directed.

S&F rolled mild steel as in joists, channel, angle or tee sections, fixed independently, without connecting plates etc., (cut to ordinary lengths i.e within 20mm of the length indicated) of Fe-410-W (Gde E-250 quality A) complete all as specified and as directed.(For fixing AHU motor base and Duct support)

M&L for dismantling and removing existing rusted / leakage duct ,Supply, fabricate, install GI sheet metal ducting, Zinc coated complete with standard accessories, GI hardware, self adhesive elastomer foam gasket, support etc of 22 gauge as per IS 655 complete all as specified and directed. Note :- (a) The supports such as threaded roads, flanged joints braces, shall be galvanized as per IS 655. (b) Items as required for completion of above ducting work shall be provided by the contractor for smooth functioning and successful operation of duct and quoted rate shall be inclusive for above provision

M&L for thermal insulation of duct using adhesives and FG crown-150 factory laminated covered with aluminium foil of 50 mm thickness complete all as specified.

S&F Fire Extinguisher Carbon dioxide (CO2) extinguishers consisting of welded M.S. cylindrical body, light weight squeeze lever discharge valve fitted with pressure indicating gauge with internal discharge tube, discharge nozzle suspension bracket of capacity 4.5 Kg as per IS: 2878 complete with holding accessories including taking down old unserviceable one complete all as specified & directed.

S&F Fire Extinguisher Carbon dioxide (CO2) extinguishers consisting of welded M.S. cylindrical body, light weight squeeze lever discharge valve fitted with pressure indicating gauge with internal discharge tube, discharge nozzle suspension bracket of capacity 6.0 Kg as per IS: 2878 complete with holding accessories including taking down old unserviceable one complete all as specified & directed.

S&F in repairs/replacement of bakelite terminal plate including brass studs, bolts and nuts etc suitable to match any make of 3 phase electric motors and capacity up to 15 HP complete all as specified and as directed.

S&F in repairs / replacement of HEPA Filter 0.6 micron of size 600X600X305mm of box type as per existing specification complete all as specified and as directed.

S&F in repairs / replacement of PCB Display Board suitable for 120TR Bluestar Plant of auxillary supply 8V & 12 V as per existing specifications complete all as specified and as directed.

S&F in repairs /replacement of AHU Blower Set of fan pulley :106x 1 Spa of speed 1230 RPM and Motor pulley 90X 1Spa as per existing specifications complete all as specified and as directed.Make :Zeco

S&F in repairs / replacement of AHU drier core as per existing specifications complete all as specified and as directed.

S&F in repairs cast iron non return sluice valve suitable for 150 mm bore of pipe with flanged ends drilled with holes, Class PN 1.6 (conforming to IS 14846) with brass spindle and checknut, rubber gasket 3mm thick, nut, bolts and washers, necessary machining works complete all as specified and as directed.

rc enterprises (BID ID -3211808)