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REPAIR & MAINTENANCE OF WATER COOLED SCREW CHILLED AIR CONDITINING PLANT 3 X 450 TON CAPACITY AT PH-II BLDG MH KHADKI COMPLETE WITH AIR HANDLING UNIT REPLACEMENT OF FILTER UNSV CONTROL VALVES, MS PIPES INSULATION OF CHILLED WATER PIPE,DUCTS,CONTROL PANEL,STARTER ,REWINDING OF MOTOR ,DESCALING OF CONDENSOR,COOLING TOWER,INCLUDING PERIODICAL MAINTENANCE AS PER MANUFACTURER MAINTENANCE SCHEDULE COMPLETE AND CONNECTED CERTAIN OTHER MISCELLANEOUS ITEMS OF AIR CONDITIONING PLANT UNDER GE (MH& RH) KHADKI-Carrying out annual maintenance of 450 TR water chillier plant by approved OMC (original manufacturingcompany i.e DUNHAM-BUSH)including following routine work . 2 i)Inspecting the machine 3 times a year in equal quarters. Duringthis inspection the following work will be carried out:ii)Checking the refrigeration systemiii)Checking the operation of controlsiv)Checking of microprocessor logic operationv)Attending to service calls for trouble diagnosis apart from scheduled quarterly visits.vi) Reporting to Enginner-in- Chargethe condition of machine at the timeofinspectionand attending the same by overhaulingcompressor/replacingcomponents, 3 vii) Checking thesystemforanyleaksandrectificationofleaks.(iffound Leakage, repair on chargeable basis)viii) Taking set of readingsandevaluatingtoensuresatisfactoryperformanceof the plantix) Informing the operating personnel of changes or adjustments made and recommending to them improvements in trouble free operation of the plantNote:-i) Spares shall be measured and paid separately under relevant item as supply only taking down and fixing new spare shall be deemed to be included in the unit rate quoted under this item in case required.ii) Imparting operational training to our operating staff at thebeginningof contract 4 Supply only the following defective / worn out spares / controls for the chillier Plant all as specified and as directed. 5 Pressure transducer - Low pressure / High Pressure / Oil pressure up to 10 Kg / cm2 6 Temperature sensor suitable for the chillier unit. 7 Pressure relief valve 8 Gasket Partition Sr no M05 9 Valve-Ball 7/8 Sr-17307 10 Valve-Ball 1/8 Sr-17309 11 Valve Saloined 5/8 ODF 12 M & L for descaling of complete condenser units for central/ package type AC plant of capacity 450 TR by means of adding descaling chemical solution or equivalent in the cooling tower sump of required quantity and circulating the liquid to remove the scales inside the pipes and removing side covers of condenser, cleaning the water tubes by scrubbing with nylon brushes and flushing with fresh water, re fixing the covers, Inlet and out let pipes including replacement of neoprenerubber gasket etc.complete all as specified and directed by Engineer-in-charge 13 Repairing, servicing and overhauling the centrifugal pump by dismantling the pump coupled with induction motor, opening the pump, inspecting for defects and replacing the worn out parts like gland bush, bearings, gland bolts and nuts,gland packing, gasket, water seal etc including repairs to pump shaft by remetalling, grinding, polishing and reassembling the same and replacing the rusted nuts, bolts, washers etc and coupling with motor testing complete for the following capacity of pump all as specified and directed by Engr-in-charge. 14 Primary chillier pump20 HP of make Kirloskar, Crompton, Shakti 15 Secondary chillier Pump 40 HP of make Bell & Gossett 16 Condenser Pump 30 HP of make Kirloskar, Crompton, Shakti 17 M & L for taking out the centrifugal pumpmotor andtransporting to work shop , split opening the motor removing the unserviceableburntwindingwire, cleaning the slots, re winding with super enamelled copper conductor wire of suitable size including insulating materials, varnishing and drying and reassembling and transporting back to site , coupling with pump testing and commissioning all as directedfor thefollowing capacities ofmotors : - 18 Primary chillier Motor20 HP of make Kirloskar Brothers 19 Secondary chillier Motor 40 HPof make Bell & Gossett 20 Condenser Motor 30 HP of make Kirloskar Brothers 21 Blower Motor of Cap 5 HP to 7.5 HP of make Bharat Bijali 22 Blower Motor of Cap 3 HP of make Bharat Bijali 23 Dismantling the covers of cooling tower and the cooling fan blades from the position, electrical connections and taking down the cooling tower motor of capacity 10 HP, split opening the motor, removing the burnt out winding, cleaning the slots re winding with super enamelled copper conductor wire of suitable size including insulating materials, varnishing and drying and reassembling and transporting back to siteand testing on commissioning all as directed by Engineer -in Charge. 24 Supply and fix cooling tower fins as per existing size and shape during all as specified and directed 25 Descaling of cooling tower by dismantling the cooling tower fins removing the scales in the fins, sump by scrubbing with wire / nylon brush and refixing the fins in position including replacing the float valve for supply water line, painting the steel/wooden surfaces with two coats of enamel paint over a coat of zinc oxide primer and testing the cooling tower all as specified and as directed. 26 Supply andreplace the worn out"V" belts of blower motor. 27 A1738LP/A67 28 A1611LP/A62 29 B1973LP/B76 30 A1484LP/A57 31 A1509LP/A58 32 A1585LP/A61 33 Supply and fill Gas R-134 a in cylinder for charging / topping up whenever required. 34 Material and Labour for leak testing of gas by evacaveting the gas by suitable means and filling with nitrogen gas for 24 hours rectifying the leakages with and including required material / brazing etc. and refilling gas testing chillier all specified and directed. 35 S&F in replacement ofdouble fitted polymer fabric HDPE fresh air filter(Filter class-G3 as per EN 779) washable/cleanable type having efficiency 95% to 99% down to particle size of 10 micron, fabricated out of CRCA sheet metal duly painted with two coat of grey hammer tone spray painted over two coats of red oxide primer, with lifting handle, Box/flanged type, aluminium spacer etc, of make Thermadyne/ Pall supralon filter / Micron filter all as specified by engr-in-charge of following sizes :- 36 610X610X50 mm 37 305x610x50 mm 38 610x305x50 mm 39 S&F in replacement of double fitted polymer fabric HDPE fresh air filter(GL-type) washable/cleanable type having efficiency 95% to 99% down to particle size of 5 micron, fabricated out of CRCA sheet metal duly painted with two coat of grey hammer tone spray painted over two coats of red oxide primer, with lifting handle, Box/flanged type, aluminium spacer etc, including taking down make Thermadyne/ Pall supralon filter / Micron filter all as specified by engr-in-charge of following sizes :- 40 610x610x305 mm 41 305x610x305 mm 42 610x305x305 mm 43 Supply and fixin repairs butter fly valve of dia 100mm suitable for condensing /chillier water line with ISI marked including jointing with gasket ,nut,bolts washer all as specified by Engr-in- charge 44 Supply and fixin repairs in repairsbutter fly valve of dia 125mm suitable for condensing /chillier water line with ISI marked including jointing with proper gasket,nut,bolts washer all as specified by Engr-in- charge 45 Supply and fixin repairsbutter fly valve of dia 150 mm suitable for condensing /chillier water line with ISI marked including jointing with proper gasket,nut,bolts washer all as specified by Engr-in- charge, 46 Supply and fixin repairs NRV of dia 250 mm suitable for condensing /chiller water line with ISI marked including jointing with proper gasket ,nut,bolts washer all as specified by Engr-in- charge 47 Supply and fill compressor oil for centrifugal compressor for toping up / replacement as required and all as directed. 48 Supply & fixing in replacement of water pressure gauge as per existing make 49 Supply& fixing in replacement of Temp gauge as per existing make .. 50 S&F in replacement of following ball bearing (NDE/DE) suitable for cooling tower motor ,chillier motor, Blower motor, condenser motor etc removing of existing unserviceable bearing of any type or make all as directed by Engr-in-charge. 51 6205/2Z 52 6206/2Z 53 6207/2Z 54 6208/2Z 55 Supply and fix in replacement MCCB of following capacities:- 56 630 A TP 50 KA Adjustable type 415V AC 57 400A,TP.415V,50 Hz, 36 KA adjustable type 58 250A,TP.415V,50 Hz 36 KA adjustable type 59 125A,TP.415V,50 Hz 36 KA adjustable type 60 100A,TP.415V,50 Hz,16KA adjustable type 61 160A,TP.415V,50 Hz,36KA adjustable type 62 32A,TP,415V,50Hz,16KA adjustable type 63 Supply and fixin repairs of Power contactor AC-3of Aux voltage 230V , 3NO+1NC of following capacities 64 MNX 50-TP ofrating 32A, 65 MNX 32-TP ofrating 32A, 66 MNX 25-TP of rating 25A, 67 MNX 12-TP of rating 12A, 68 Supply and fixin repairs of over load relay with inbuilt single phase protection of following capacities 69 MN5 of rating 20-33A 70 MN2 of rating 14-23A 71 MN2 of rating 6-10A 72 MN2 of rating 4-6A 73 Supply and fixin repairs the strip heaters of capacity 3 KW / strip all as specified and as directed. Make : Omega / Platinum / finned 74 Carrying out Servicing of existing installed VFD as per manufacturer"s standard and testing complete as per specified and directed Make : Danfoss 75 Supply and fix pully including taking down old unserviceable / damaged pully along with necessary fabrication to shaft for filling wear out portion and turning complete, including making alignment, quoted rate includes transportation, hardware & T&P as per site requirement all as specified and directed. 76 Quarterly Greasing of AHU"s all pedestal bearing as per IS Standard including cleaning of old unserviceable grease with help of grease gun up to topping up, rate should quoted including price of grease and T& P 77 Supply and Replacement AHU blower DIDW fan blower having out velocity not exceeding S.P.(mm/wg) 50-60 m/s energy efficient fan with double inlet , double with forward or backward curved impeller for high static pressure mounted on aluminium extended side rail base frame, existing AHU of following 78 Blower for Capacity 5 HP motor 79 Blower for Capacity 3 HP motor 80 M&L for applying one coat of synthetic enamelled paint including preparation of surfaceof 450 TR capacity existing cooling tower with existing colour all as per directed and specified 81 Descaling of cooling tower makeup tank by dismantling the strainer removing the scales in the tank, sump by scrubbing with wire / nylon brush and refixing the strainer position including replacing the float valve for supply water line, painting the steel/wooden surfaces with two coats of enamel paint over a coat of zinc oxide primer and testing the cooling tower all as specified and as directed. 82 Repairing /servicing and overhauling the Pan type humidifier are closed type & Connected to supply air duct Capacity upto 3 KW to 6 KW all as specified and directed by Engr-in-charge. Make - Emerald 83 Supply & fix in repairGM gate/ globe valve heavy duty conferming to IS-778 with iron wheel head screwed both end for 40 mm or size as per existing complete all as specified and directed. 84 Supply and replace three way mixing/modulating valve (Actuator) of diameter as per existing model No CN72220A2007 / CN7510A2001 proportional linear type, motorised mixing valve BS 4540 PN-10 -PN 40 having manual over ride facility with proportional thermostat/Humidity sensor and interconnection wiring with 1.5 sq mm copper conductor multi core cable all as specified and directed 85 Supply and fix in replacement MCB of following capacities 86 TP 25 To 63 AMP.415V,50 Hz,10 KA C curve 87 6A to 32 Amp ,SP,240V,50Hz,10 KA C curve 88 Supply Erecrtion testing and commissioning in repair O closed cell elastomeric nitrile rubber with aluminium foil laminated on oneside, having thermal Temperature, of 20 c as per EN 12667, moisture diffusion resistance factor or u Value of minimum 7000 for base insulation material without the foil as per EN 12086, fire performance such that it passes Class 1 as per BS476 Part 7 for surface spread of flame and also fireperformance of V0, HB as perUL 94, 1996, density without the foil between 40 to 55 KG/ Cum. the insulation material shall be FM ( factoryMutual) USAapproved and dust & fibber free. the Aluminium foil shall be 60 microns thick and its weight shall be 193 gms as per EN ISO 2286-2, tensile strength 90 N/ 15 mm as per EN ISO 527-3 with elongation>10% as per EN ISO 527-3. All complete as specified in particular specification 19 mm thick thermal insulation as directed. 89 Supply, assembly and erection of GI sheet with TDF flange rectangular/square duct made out of L shaped hollow profile, duly factory boxed including all accessories such as corner, cleat, carriage bolt, gasket and appropriate sealant on longitudinal joints etc complete with GI sheet of thickness 22 gauge completeall as specified & directed. 90 Supply, assembly and erection of GI sheet with TDF flange rectangular/square duct made out of L shaped hollow profile, duly factory boxed including all accessories such as corner, cleat, carriage bolt, gasket and appropriate sealant on longitudinal joints etc complete with GI sheet of thickness 24 gauge completeall as specified & directed. 91 S & F VFD for motor as per existing parameters and suitable for 40 HP motor along with programme setting recommended by OEM (Dun Ham Bush) complete all as specified and directed 92 Repair to Microprocessor based control panel display unit for 450 TR AC chillier unit including spare parts Make : Kirloskar / Dun-Ham-Bush / Blue star 93 Repairand replacement of old unserviceableAHU doors of any sizedoor double skin panel with pressure injected CFC & HCFC free PUF having "K" value of 0.02 W/C/m & density of 40 kg/ms pre coated, pre plasticized , galvanized outer and inner skin 0.06mm thick,air tight casing using gasket and self adhesiv,PVC Nylon hinges, passage handles view port and marine lamp ,limit switch etc complete all as directMake : Kirloskar / Blue star / Voltas 94 Supply and fix supply air diffuser for the 4-way square supply air terminal should be in aluminium powder coatedconstruction with easily removable central core & 4-way uniform air distribution. Volume control damper to be of opposed blade, nylon geared with aerofoil blades & blank matt powder coated (Out to out size shall be as per existing with full louvers with required duct connection size (as per approved layouts) & as per approved sample (Colour to match architects requirements) all as specified and as directed following size. 95 S& F air diffuser for the 4-way square return air terminal should be in aluminium powder coatedconstruction with easily removable central core & 4-way uniform air distribution.(Out to out size shall be as per existing with full louvers with required duct connection size (as per approved layouts) & as per approved sample (Colour to match architects requirements) all as specified and as directed. 96 M&L for descaling of Cooling coil of AHU"s of any capacity by means of adding descaling chemical solution or equivalent of required quantity and circulating the liquid to remove the scales inside the pipes and cleaning the water tubes by scrubbing with nylon brushes and flushing with fresh water, re fixing the covers, Inlet and out let pipes including replacement of neoprenerubber gasket if required etc. complete all as specified and directed.
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