Tender For Repair/Maintenance Of Central Ac Plants At Af Station Memaura.; 1 Carrying out maintenance of central AC plant water cooled micro processor based having scroll compressor,chilled water system type of capacity 2x37.5 TR by regural maintenance by a trained mechanic & OEM rep as and when required (on order) for checking/rectifying defect to make the plant in serviceable condition within 72 hours in case of major break down, along with all tools,brazing tools and materials elctrical testing tools etc to make plant serviceable including setting of in/out temperature of microprocessor control panel and also required dismantling,refixing serviceable parts and replacing defective parts (new parts shall be measured and paid seperately and paid under respective items as supply only) complete all as specified and directed. 2 NOTE :The work per unit includes :- (i) General visit to be done as ordered to carry out work during contract period by OEM rep in addition to daily visit of mechanic(ii) checking of proper funtioning of microprocessor and all its parameters are as specified if any error,resetting as per design condition.(iii) checking repairing of control wiring.(iv) checking/setting of water flow swith,HP/LP switch(v) functioning of chiller & condenser with design parameter(vi) functioning of compressors(vii) all others functioning of control parameter of AC Plant required for achieving design parameter of conditioned space.(viii) Proper visit and maintenance work carried out record has to be maintained duly signed by contractor and Engr-in-charge. 3 Supply only the following item of AC Plant mention here in before to fixed under item no.1 complete all as specifed and directed. 4 (a) Tempreture Sensor for chiller machine of blue star all as per sample 5 ( b) Water Flow switch of model HFS-25 of synergy,Honywell or equivalent. 6 ( c) HP / LP cut off switch as per existing capacity and make : Danfoss or equivalent. 7 (d) Filter Drier 8 (e) safety valve for condensor 9 (f) Thermostatic expansion valve.Make: danfoss, Honeywell 10 Material and labour for de-scaling and cleaning of chocked pipes of water circulating lines including service valves, condenser (heat Exchanger) to cooling tower by circulating concentrated de-scaling solution (concentrated hydrochloric acid) mixed with water in suitable proportion till the complete deposits/scale is removed but min 24 hours whichever is later & as ordered, circulating through pump, servicing of valves, cooling tower, water spray assembly, cleaning with suitable size of drill rod, wire brush including dismantling and connecting all dismantled components in proper position after servicing/ overhauling/greasing etc. replacement of packing gasket 3mm thick, nuts, bolts with washer, testing of water line for leakage, complete all as specified and directed for central AC plant central AC plant 2x37.5 TR capacity.Note: De-scaling of one condenser/ Chiller will be consider as one job.Each condenser to be carried out as site requirement as directed. 11 Microcontroller in replacement of old unserviceable microcontroller (LCD type) complete with internal PCB Controller board/card along with outer (external) display contyrol unit with inclusive of all control wiring/ terminal etc complete as a single unit for one machine complete in respect suitable for blue star chiller machine of capacity 37.5 TR.complete all as specified and directed. 12 M&L for painting the interior and exterior parts of cooling tower of central AC plant of cap 2X37.5 TR with epoxy seal paint as per the manufactures specifications including prepairing the surface of cooling towers afters removing all the PVC fills, nozzles, ID fan and cleaning the water collecting tray for algae free surfaces using necessary detergent chemicals complete sealing the leakage on the body if any while apply the epoxy sealing paint complete to all as specified and directed. 13 M&L for carrying out pressure leak test by nitrogen gas of the system of AC plant 2x37.5 TR for leak proof valve joints, seal & other connected contracts etc. including identifying and rectifying of leakage (if any) and maintaining constant pressure of 160 PSI on lower side and 300 PSI on higher side for 24 hours, complete all as specified & directed. Note : T&P and nitrogen gas shall be arranged by the contractor at his own cost. 14 Taking out the filter from AHU up to 10000 CFM cleaning the cooling coils/hot water coils/inside layers of modular AHU panelwith suitable chemical and jet of water pressure with pump and remove all the scale and foreign material deposited in side coil followed with air pressure to sweep up all the paticles and ensurethrough flow of air over the cooling coils including cleaning of blower section/stainless steel drain pan with all drain GI pipes complete as specified and directed and refixing the air filter after cleaning of central AC plant 2x37.5 TR 15 Replacement ofAHU Pre filter of 50 mm thick washable type with filter element made out of synthetic non woven media supported by HDPE mesh on both side including stitching in diamond pattern complete including frame and suitable for efficiency 90% down to 10 micron EU-3 type complete all as specified & directed, of 2x37.5 TR central AC plant 16 Replacement ofAHU secondary dry type cleanable and easlily maintainable air filter in 2x37.5 TR central AC plant, suported by GI wire and folder to form accordion plate having an efficiency of 95% down to 5 micron EU-5 type complete all as specified & directed. 17 S & F in replacement Contactor of rating 22 Amps 415 V, triple pole with auxiliary contacts MNX-A2 add on block 1NO + 1NCfor AC circuit, DIN mounting confirming to IS/IEC 60947-4-1 complete all as specified and directed.Make : L&T Cat No. CS94980 (MNX 22) or equivalent in Schneider/Hager/Legrand 18 Supply & Fixing in replacement fan beltfor cooling tower fan of central AC Plant of cap 2x37.5 TRas per site requirement and as per sample complete all as specified & directed.(Make : DUNLOP/FENNER/ECODRIVE) 19 M&L for taking up or down butterfly valve of any description and supply,fixing and testing new butterfly valve of 50 mm bore in existing pipe line after necessary cleaning etc.complete all as specified and directed. 20 M&L for complete overhauling of 7.5 HP water pump cleaning, oiling, greasing and replacement of other worn out/unsv parts of pump if required complete all as specified and directed. 21 M&L for complete overhauling of 3.0 HP water pump cleaning, oiling, greasing and replacement of other worn out/unsv parts of pump if required complete all as specified and directed. 22 Material and labour for de-scaling and cleaning of chocked pipes of water circulating lines including service valves, condenser (heat Exchanger) to cooling tower by circulating concentrated de-scaling solution (concentrated hydrochloric acid) mixed with water in suitable proportion till the complete deposits/scale is removed but min 24 hours whichever is later & as ordered, circulating through pump, servicing of valves, cooling tower, water spray assembly, cleaning with suitable size of drill rod, wire brush including dismantling and connecting all dismantled components in proper position after servicing/ overhauling/greasing etc. replacement of packing gasket 3mm thick, nuts, bolts with washer, testing of water line for leakage, complete all as specified and directed for central AC plant 3x20 TR . 23 M&L for carrying out pressure leak test by nitrogen gas of the system of AC plant 3x20 TR for leak proof valve joints, seal & other connected contracts etc. including identifying and rectifying of leakage (if any) and maintaining constant pressure of 160 PSI on lower side and 300 PSI on higher side for 24 hours, complete all as specified and directed. Note : T&P and nitrogen gas shall be arranged by the contractor at his own cost. 24 Pumping back the refrierant gas to a seprate gas cylinder from the AC plant,before leak test with the help of required T&P and charging back the same refrigerant gas to the AC Plant after the leakage test, complete all as specified and directed. 25 M&L for charging of refrigerant gas (R-22) in central AC plant 3x20TR capacity including provision of all T&P as required at site complete all as specified & directed. 26 Taking out the filter from AHU of capacity 14000 CFM cleaning the cooling coils/hot water coils/inside layers of modular AHU panelwith suitable chemical and jet of water pressure with pump and remove all the scale and foreign material deposited in side coil followed with air pressure to sweep up all the paticles and ensurethrough flow of air over the cooling coils including cleaning of blower section/stainless steel drain pan with all drain GI pipes complete as specified and directed and refixing the air filter after cleaning of central AC plant 3x20 TR. 27 M&L for painting the interior and exterior parts of cooling tower of central AC Plant of cap 3X20 TRwith epoxy seal paint as per the manufactures specifications including prepairing the surface of cooling towers afters removing all the PVC fills, nozzles, ID fan and cleaning the water collecting tray for algae free surfaces using necessary detergent chemicals complete sealing the leakage on the body if any while apply the epoxy sealing paint complete to the entire satisfaction complete all as specified and directed. 28 Cleaning of cooling tower of central AC plant of cap 3X20 TR by applying the suitable chemical and removing al the deposited dust, forign material, cleaning of filter and servicing of CT fan motor, sprinklers and PVC arms complete all as specified and directed. 29 Supply & Fixing in replacement sprinklerof cooling tower of central AC Plant of cap 3x20 TR of make as per site requirement or as per sample complete all as specified and directed. 30 Supply & Fixing in replacement CT fan blade with Hub and Blade complete for CT motor of cooling tower of central AC Plant of cap 3x20 TR of make as per site requirement or as per sample complete all as specified and directed. 31 Supply, fixing & testing complete contactor ML-3 type, three pole power contactor with 2 NO + 2 NC auxiliary contacts for AC circuit having current rating (AC3) of 40 Amps at 415 Volts, 50 Hz. confirming to IS/IEC 60947-4-1 complete all as specified and directed. Make : L&T/Havells/C&S or equivalent 32 S&F in replacement of HP / LP cut off switch as per existing capacity and make complete all as specified & directed. Make : Danfoss or equivalent. 33 S&F in replacement of oil pressure cut off switch as per existing capacity complete all as specified & directed. 34 M&L for replacement of compressor oil for AC plants complete all as specified & directed.(Make: HPCL, Indial Oil, Servo-Friz) 35 Dismantling the burnt Squarrel cage induction motor of capacity 25 HP andrewinding motor by using super enamelled copper winding wire of same gauge as existing and replacement of gun metal bush, bearing,other worn out/unsv part if necessary and refitting the same, testing and commissioning complete all as specified & directed. 36 Dismantling the burnt condenser pump motor (Make of motor: Kirloskar) of capacity 5 HP andrewinding motor by using super enamelled copper winding wire of same gauge as existing and replacement of gun metal bush, bearing,other worn out/unsv part if required and refitting the same, testing and commissioning complete all as specified & directed. 37 Supply and fixing in replacement ofpump impeller suitable for 3 HP pump or as per sample complete all as specified & directed. 38 Supply and fixing in replacement ofpump impeller 10 HP pump or as per sample complete all as specified & directed. 39 Dismantling of the expansion valve and servicing the same thoroughly & refixing the same in existing position complete all as specified and directed. 40 M&L in replacement of V belt B-29 complete all as specified and directed.Make : DUNLOP / Fenner. 41 M&L in replacement of V fan belt A-27 complete all as specified and directed.Make : DUNLOP / Fenner. 42 Dismantling of the Oil seal assembly of compressor 20 ton capacity & refixing the same in existing position complete all as specified and directed. 43 Taking out the filter of central AC plant 3x11 TR,cleaning the cooling coils/hot water coils/inside layers of modular panelwith suitable chemical and jet of water pressure with pump and remove all the scale and foreign material deposited in side coil followed with air pressure to sweep up all the paticles and ensurethrough flow of air over the cooling coils including cleaning of blower section/stainless steel drain pan complete as specified and directed.Note : Any extra maint/servicing required to any unit for its smooth fuctioning shall be done by the contractor without any extra cost during the contract period. 44 Maintenance, servicing & cleaning of Outdoor unit of Package AC 3X11 TR capacity at site, cleaning of equipment by using blower to remove the complete dust, cleaning all the components with suitable cleaning agent, combing the condenser coil for better efficiancy complete as specified and directed.Note : Any extra maint/servicing required to any unit for its smooth fuctioning shall be done by the contractor without any extra cost during the contract period. 45 Microcontroller in replacement of old unserviceable microcontroller (LCD type) complete with internal PCB Controller board/card along with outer (external) display contyrol unit with inclusive of all control wiring/ terminal etc complete as a single unit for one machine complete in respect suitable for blue star Package type AC Plant of capacity 11 TR.complete all as specified and directed. 46 Taking down unserviceable condensing coil unit and supply and fix new condensing coil unit suitable for outdoor unit of 3X11 TR AC plant, as per the existing, including brazing the suction / discharge lines and filling the suitable refrigerant gas and testing on all as specified and directed. 47 Supply and fixing in replacement of condenser/cooling fan blade suitable for existing make and model 3X11 TR Package ACn all as specified and directed. 48 Supply and fixing in replacement of condenser motor suitable forexisting make and model3X11 TR Package AC all as specified and directed. 49 M&L for carrying out pressure leak test by nitrogen gas of the system of3x11 TR AC plant for leak proof valve joints, seal & other connected contracts etc. including identifying and rectifying of leakage (if any) and maintaining constant pressure of 160 PSI on lower side and 300 PSI on higher side for 24 hours, complete all as directed by EIC.Note : (i) T&P and nitrogen gas shall be arranged by the contractor at his own cost.(ii) Charging of Refrigerant shall be measured and paid separately 50 Supply only Sling Psychrometer Thermometer wooden body complete all as specified & directed. 51 Taking out the filter of central AC plant 3x7 TR,cleaning the cooling coils/hot water coils/inside layers of modular panelwith suitable chemical and jet of water pressure with pump and remove all the scale and foreign material deposited in side coil followed with air pressure to sweep up all the paticles and ensurethrough flow of air over the cooling coils including cleaning of blower section/stainless steel drain pan complete as specified and directed.Note : Any extra maint/servicing required to any unit for its smooth fuctioning shall be done by the contractor without any extra cost during the contract period. 52 Maintenance, servicing cleaning of Outdoor unit of Package AC 3X7 TR capacity at site, cleaning of equipment by applyingblower to remove the complete dust, cleaning all the components with suitable cleaning agent, combing the condenser coil for better efficiancy complete as specified and directed.Note : Any extra maint/servicing required to any unit for its smooth fuctioning shall be done by the contractor without any extra cost during the contract period. 53 Supply and fixing in replacement of condenser/cooling fan blade suitable for 3X7 TR Package ACn all as specified and directed. 54 Supply and fixing in replacement of condenser motor suitable for 3X7 TR Package AC all as specified and directed. 55 M&L for carrying out pressure leak test by nitrogen gas of the system of3x7 TR AC plant for leak proof valve joints, seal & other connected contracts etc. including identifying and rectifying of leakage (if any) and maintaining constant pressure of 160 PSI on lower side and 300 PSI on higher side for 24 hours, complete all as directed.Note : (i) T&P and nitrogen gas shall be arranged by the contractor at his own cost.(ii) Charging of Refrigerant shall be measured and paid separately. 56 M&L for charging of refrigerant gas (R-407C) in (2x37.5 TR), (3X11 TR), (3x7 TR) Central AC plant including provision of all T&P as required at site complete all as specified & directed. 57 Supply & fix in replacement of copper tube 3/4 as per site requirement complete all as specified & directed. 58 Supply & fix in replacement of copper tube 1/4 as per site requirement complete all as specified & directed. 59 Supply & Fixing in replacementMCCB 320 Amp, 3 Ploe, 36 KA breaking capacity,with adjustable thermal magnetic release with spreader links on both sides with existing size and make as suiable to fit in the existing LT Panel all as specified and directed. Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 60 Supply & Fixing in replacementMCCB 250 Amp, 4 Ploe, 36 KA breaking capacity,with adjustable thermal magnetic release with spreader links on both sides with existing size and make as suiable to fit in the existing LT Panel all as specified and directed.Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 61 Supply & Fixing in replacementMCCB 200 Amp, 4 Ploe, 36 KA breaking capacity,with adjustable thermal magnetic release with spreader links on both sides with existing size and make as suiable to fit in the existing LT Panel all as specified and directed.Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 62 Supply & Fixing in replacementMCCB 100 Amp, 3 Ploe, 25 KA breaking capacity,with adjustable thermal magnetic release with spreader links on both sides with existing size and make as suiable to fit in the existing LT Panel all as specified and directed.Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 63 Supply & Fixing in replacementMCCB 80 Amp, 4 Ploe, 16 KA breaking capacity,with adjustable thermal magnetic release with spreader links on both sides with existing size and make as suiable to fit in the existing LT Panel all as specified and directed.Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 64 Supply & Fixing in replacementMCCB 63 Amp, 3 Ploe, 16 KA breaking capacity,with adjustable thermal magnetic release with spreader links on both sides with existing size and make as suiable to fit in the existing LT Panel all as specified and directed.Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 65 Supply & Fixing in replacement MCB TP 415 volts, C curve of rating 25 to 40 amps, with breaking capacity 10 KA, existing size and make as suiable to fit in the existing LT Panel all as specified and directed. Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 66 Supply & Fixing in replacement MCB TPN 415 volts, C curve of rating 16 amps, with breaking capacity 10 KA, existing size and make as suiable to fit in the existing LT Panel all as specified and directed. Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 67 Supply & Fixing in replacement MCB SP 240 volts, C curve of rating 06 to 32 amps, with breaking capacity 10 KA, existing size and make as suiable to fit in the existing LT Panel all as specified and directed. Make: Havells/HPL/L&T/Schneider/C&S/Indo Asian 68 Supply and fixing Freon gas pressure gauge of range 0 - 150 PSI, 150 mm dia complete all as specified & directed. (Make : Fiebig /ACCEL/WAAREE/WIKA/MAHAVEER) 69 Supply and fixing Water temperature guage fitted in water circulation cicuit, Range-0 to 50 deg/0 to 30 deg centigrade 0 to 120 deg/0 to 20 deg faranheat) complete all as specified & directed.Make - FIEBIG/GURU/GLUCK 70 S&F in replacement of thermal over load relay of existing ranges as per existing make and model starting from 9 Amps to 42 Amps complete all as specified & directed. 71 S & F in replacement of Electronic timerfor star-delta starter of series ETR 550, complete all as specified and directed. 72 S&F in replacement of single phase preventer, auxiliary volts 415 volts, complete all as specified and directed. 73 S & F in replacement of Amp meter 0-40 Amps,96mmx96mm,digital type with inbuilt selector switch,auxiliary supply 230 V complete all as specified & directed. 74 S & F in replacement of AC digital voltmeter 0-500Volts, 96mmx96mm, digital type with inbuilt selector switch, auxiliary supply 230 V complete all as specified & directed. 75 S & F in replacement of Multi function meter digital type display with Volts, AMP, KW, PF,Hz, suitable for ,auxiliary supply 230 V complete all as specified & directed. 76 S&F in replacement of Phase sequence relay 230 V suiable with existing size and make complete all as specified & directed. Model : 800PSR, Make: Selec 77 M & L for Earthing complete with galvanised steel earth plate electrode, 600mm x 600mm x 6mm thick, buried directly in theground (earth pit not less than 2.25m deep below normal (ground level) with top edge of the plate not less than 1.50m below ground level connected to galvanized iron strip 25 x 4 mm as earth leadby means of bolts, nuts and washers of GIup to test point, GI tubing 40 mm bore medium grade protection pipe, GI watering pipe 20mm bore light grade with funnel and wire mesh, charcoal and salt, 40mm thick pre-cast RCC M-25 cover reinforcedwith suitable steel handle, and angle iron 40X40X3mm frame and chamber of PCC (1:3:6) type C-1 (including earth work in any type of soil, removal of surplus soil to a distance n.exc.50m) and connecting, testing on completion, all as shown on electric plate No. 03 of SSR-2009 Part-I, complete all as directed.Notes: 1.Earth lead & protection pipes length upto & including 7.50 metre shall be deemed to be inclusive in the quoted rate.2.On testing, after completion of job, if desired earth resistence is not found, the earthing shall be redone at no extra cost to govt. 78 M&L for preparartion of old painted steel or iron surfaces of LT Panel of various size by scraping with steel wire brush/scrapping with emery paper etc and apply one coat of synthetic enamelled siemens grey/existing colour (Painting shall be done by spray machine) complete all as specified and directed. 79 Supply and fixing glow sign board of central AC Plant (size 3000 mm x 800 mm x 150 mm) weather proof made of mild steel angle 50 mm x 50 mm x 6 mm with acrylic sheet 2mm thick and writing name of AC plant as directed with arial black font with suitable size not exceeding 150 mm and minimum size 100 mm and illuminated with LED strip with including necessary wiring and other accessories and fixing on wall with suitable fashner complete all as specified & directed. 80 M&L for taking out the damaged insulation portion of existing refrigerant line/ chiller water pipe line/ hot water pipe line on any sizes and cleaning the pipe and insulation with thermocol of pipe section TF quality wrapped around pipe and fixing it with GI wire mesh including wrapped with SS sheet and site clearance of old debris of central AC plant 2x37.5 TR complete all as specified and directed. 81 S & F of On load change over switches Sheet Steel Enclosure of any description & in any position LT Heavy Duty 4 Pole Rotary type By pass change over switchAC on load 320 Amps, 415V, 50Hz complete with handle assembly complete all as specified & directed. Make: L&T/Havells /Legrand/C&S/Standard 82 Taking down unserviceable condensing coil unit and supply and fix new condensing coil unit suitable for outdoor unit of 3X7 TR AC plant, as per the existing, including brazing the suction / discharge lines and filling the suitable refrigerant gas and testing on all as specified and directed.
