REPAIR MAINTAINANCE OF CENTRAL AC PLANTS AT AFS MEMAURA

Amount

Carrying out maintenance of central AC plant water cooled microprocessor 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 breakdown,along with all tools,brazing tools and materials elctrical testing tools etc to make plant serviceable including setting of in/out tempreture 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 of ''Sch A'' as supply only) complete all as specified and directed. 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.

Supply only the following item of AC Plant mention here in before to fixed under item no.1 complete all as specifed and directed:-

Tempreture Sensor for chiller machine of blue star all as per sample

Water Flow switch of model HFS-25 of synergy,Honywell or equivalent.

LP/HP control switch as per sample

Filter Drier

safety valve for condensor

Thermostatic expansion valve

Pressure gauge of any description and in any position and Supplying 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)

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) Make - FIEBIG/GURU/GLUCK

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.

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.

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 complete all as specified and directed.

Fixing only existing GI shed of AC ducts with appropriate anchors bolt with making necessary arrangement of scaffolding to fecilitate the fixing of the loose shed on wall complete all as per direction.

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 directed by EIC. Note : T&P and nitrogen gas shall be arranged by the contractor at his own cost.

M&L for charging of refrigerant gas (R-407C) in 2x37.5 TR central AC plant including provision of all T&P as required at site.

Taking out the filter from AHU up to 10000 CFM cleaning the cooling coils/hot water coils/inside layers of modular AHU panel with 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 ensure through 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

Replacement of AHU 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 directed & specified,of 2x37.5 TR central AC plant

Replacement of AHU 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 directed & specified.

M&L for Painting with one coats of synthetic enameled paint over one coat of red oxide primer of all steel pipes / AC Plant structures, as per the standard colour coding including painting of refrigerent/water pipe lines & mark indication aeromark in the central AC Plants complete all as directed.

M&L for replacement of PVC fills of size 825mmx300mmx300mm.(Make: - MIHIR/SUVIDHA/ AVIRATS).

M&L for replacement of PVC fills of size 1200mmx600mmx100mm.(Make: - MIHIR/SUVIDHA/ AVIRATS).

Supply & Fixing in replacement fan belt for cooling tower fan of central AC Plant of cap 2x37.5 TR as per site requirement and as per sample .(Make : DUNLOP/FENNER/ECODRIVE)

Pressure gauge of any description and in any position and Supplying 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)

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.

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 directed.

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 directed.

Supply & Fixing in replacement MCCB 250A, 4 pole,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.

Supply & Fixing in replacement MCCB 125A, 3 pole, 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.

Supply & Fixing in replacement MCCB 100A, 4P, 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.

Supply & Fixing in replacement MCCB 63A, TP, 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.

Supply & Fixing in replacement MCB 32A, TP complete with connection testing and commisioning.

Disconnecting & Taking out old existing unserviceable change over switches of any description & in any position & supplying, fixing & testing Heavy Duty 4 Pole On Load Changeover Switches 250A, 415V, 50Hz suitable for existing panel complete with handle assembly having Door Interlock and Padlocking arrangement comple as specified & directed. Make: HPL/L&T/Havells /Legrand

Taking out the filter from AHU of capacity 14000 CFM cleaning the cooling coils/hot water coils/inside layers of modular AHU panel with 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 ensure through 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

Replacement of AHU 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 directed & specified,of 3X20 TR central AC plant

Replacement of AHU secondary dry type cleanable and easlily maintainable air filter in 3x20 TR central AC plant, suported by GI wire and folder to form accordion plate having an efficiency of 95% down to 5 micron of make as per site requirement or as per sample.

M&L for painting the interior and exterior parts of cooling tower of central AC Plant of cap 3X20 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 the entire satisfaction.

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.

Supply & Fixing in replacement sprinkler of cooling tower of central AC Plant of cap 3x20 TR of make as per site requirement or as per sample

Supply & Fixing in replacement CT fan blade for CT motor of cooling tower of central AC Plant of cap 3x20 TR of make as per site requirement or as per sample

Disconnecting and removing existing unserviceable interconnecting wiring and connections of electric control panels of Central AC Plant of 3X20 TR Cap after thorough checking and inspections at site and material & labour for repairs of electric control panel & its interlocking system by using PVC insulated and unsheathed stranded copper conductor cable, single core,1.5 Sqmm size, 1100 Volts grade cable for making functional controls of the compressor, condenser water pump, Air handling unit, cooling tower fan, LP/HP/Differential oil, pressure switch, solenoid valve, capacity control valve, thermostat, humidistat, heater, auxiliary contactor, push buttons, indicator, amps meter, volt meter complete as required at site for functioning of central AC plant, all as specified and directed by Engineer-in-Charge. Note :- Cost of copper conductor cable,single core,1.5 sqmm size is included in quated rates.

Supply,laying and commisioning of PVC insulated and unsheathed stranded copper conductor cable, four core ,10 Sqmm size.(Make : Havells/Polycab/Gloster).

Supply laying and commisioning of PVC insulated and unsheathed stranded copper conductor cable, four core,2.5 Sqmm size.(Make : Havells/Polycab/Gloster).

S & F in replacement of Electronic timer for star-delta starter of series ETR 550. Make : L&T/Havells

Supply, fixing & testing complete contactor ML-1/ML-1.5 type, three pole power contactor with 2 NO + 2 NC auxiliary contacts for AC circuit with AC coil voltage 220 Volts grade, 50 Hz having current rating (AC3) of 25 Amps at 415 Volts, 50 Hz. Make : L&T cat part No. SS91851 or equivalent )

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 32 Amps at 415 Volts, 50 Hz. confirming to IS/IEC 60947-4-1. Make : L&T Cat Part No SS90701 or equivalent in BCH, Siemens.

S&F in replacement of thermal over load relay of various ranges as per existing make and model starting from 9 Amps to 42 Amps complete all as specified & directed.

S&F in replacement of single phase preventer, auxiliary volts 415 volts, .

S&F in replacement of HP / LP cut off switch as per existing capacity and make : Danfoss or equivalent.

S&F in replacement of oil pressure cut off switch as per existing capacity.

M&L for replacement of compressor oil for AC plant complete all as directed.(Make: HPCL,Indial Oil, Servo-Friz)

Dismantling the burnt Squarrel cage induction motor of capacity 25 HP and rewinding 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 as per specified and directed.

Dismantling the burnt motor of capacity 7.5 HP and rewinding 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 as per the entire satisfaction.

Dismantling the burnt condenser pump motor (Make of motor: Kirloskar) of capacity 5 HP and rewinding 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 as per the entire satisfaction.

Dismantling the burnt cooling tower motor (Make of motor: Kirloskar) of capacity 3 HP and rewinding 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 as per the entire satisfaction.

Supply and fixing in replacement of pump impeller suitable for 3 HP pump or as per sample.

Supply and fixing in replacement of pump impeller for 5 HP pump or as per sample.

Supply and fixing in replacement of pump impeller 7.5 HP pump or as per sample.

Dismantling of the expansion valve and servicing the same thoroughly & refixing the same in existing position.

M&L in replacement of V belt B-98. Make : DUNLOP / Fenner.

M&L in replacement of V fan belt A-62. Make : DUNLOP / Fenner.

M&L in replacement of Shaft seal assembly for 20 TR compressor make:- VOLTAS.

M&L for maintenance / repair, testing and commissioning of open type reciprocating compressor 20 ton capacity including dismantling and disconnecting suction and discharge refrigerant lines, other controls and accessories, loading transporting for repairs to contractor's workshop, replacement / renewal of minor items not covered in the succeeding items but essentially required for completion of the job e.g. gasket kits, cut washers, valve springs, castle nuts etc. and returning back to plant room after necessary repairs and re-installation in its position, all as specified and directed. Note : Items required for replacement of worn out parts will be measured and paid separately under respective items here-in-after.

Supply only the following spare parts of compressor 20 ton :-

Pump end cover bush

Seal end bearing

Connecting rod bearings

Compressor rings

Compressor oil rings

Gasket set

SV Disk

DV Disk

(i) SV Spring

DV Spring

Oil seal assembly

Connecting rod

Piston pin

Seal end bearing washer

Seal end thrust washer

Pump end bearing washer

Valve lifter pin

Valve lifter spring

Seal cover plate

Lock ring

Felt filter

Nyloc nut

Oil pump package

Service valves

Cylinder sleeve

Piston

Ball Bearing (bearing No 6311)

Taking out the filter from AHU of central AC plant 3x11 TR,cleaning the cooling coils/hot water coils/inside layers of modular AHU panel with 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 ensure through flow of air over the cooling coils including cleaning of blower section/stainless steel drain pan complete as specified and directed.

Replacement of AHU pre filter as per existing sample, efficiency -90% down to micron, in 3x 11TR AC plant complete all as directed.

Maintenance, servicing cleaning of Outdoor unit of Package AC 3X11 Ton capacity at site, cleaning of equipment by applying 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.

Taking out unsv/damaged scroll compressor from Chiller unit in central AC Plant of cap 3X11 TR and Supply & Fixing scroll compressor 5.5 TR capacity, suitable for low ODP refrigrant like R407C including initial compressor oil filling to appropriate level complete all as directed by Engr-in- Charge as well as testing and commissioning as per the entire satisfaction.

Taking down unserviceable condensing coil unit and supply and fix new condensing coil unit suitable for outdoor unit of 3X11TR 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.

Supply and fixing in replacement of condenser/cooling fan blade suitable for 3X11TR Package ACn all as specified and directed.

Supply and fixing in replacement of condenser motor suitable for 3X11TR Package AC all as specified and directed.

M&L for carrying out pressure leak test by nitrogen gas of the system of 3x11 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

M&L for charging of refrigerant gas (R-407C) in 3x11 TR central AC plant including provision of all T&P as required at site.

Supply & fix in replacement of copper tube 3/4'' as per site requirement and all as directed

Supply & fix in replacement of copper tube 1/4'' as per site requirement and all as directed

Supply and fixing in replacement colac control air damper for AHU duct as per existing sample. Make : CONIAR or equivalent.

Supply only Sling Psychrometer Thermometer wooden body.

M&L for writing letter/figures (block,roman,italic or indian) n.exc 30cm high on each equipment like compressor,condensor,cooling tower,water pumps,AHU of AC Plant (eg.184/0054/AH/23).Complete all as specified and directed

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.

Material and labour, for earthing complete with galvanised steel earth plate electrode 600 mm x 600 mm x 6 mm thick burried directly in ground (earth pit not less than 2.25 metres deep below normal ground level) with top edge of plate not less than 1.5 metre below normal ground level connected to galvanised earth strip wire 4 mm size by means of steel bolts, nuts, check nuts and washers all as shown in electrical plate no 3 of MES Schedule Part-I connected to earthing point and testing on completion with and including 40 mm bore light grade G.I. protection pipe (upto 7.5 metre beyond earth pit) PCC pit in mix 1:3:6 type C1 with RCC 1:2:4, type B-1, 40 mm thick cover reinforced with 6 mm dia M.S bars 3 nos both ways with lifting hook made out of 6 mm dia bar, watering arrangement with funnel and wire mesh and 20 mm bore medium grade G.I. watering pipe, common salt and charcoal filling, necessary excavation and earth work complete, including breaking down of old earth pits.

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.

FUTURE Inc.

COOLING CENTRE