REPAIRS REPLACEMENT AND ESSENTIAL REPAIRS TO SUPPLY RETURN DUCTS AHU FILTERS OF AC PLANTS INCLUDING CERTAIN ESSENTIAL SPARES AND PAINTING WORKS AND ALLIED WORKS IN TUNIR AND OUTSIDE AREAS UNDER AGE EM II GE NW KARANJA

Amount

Supply, assembly and erection in repair of GI sheet with C & SS rectangular/square duct made out of L shapped hollow profile, duly factory boxed, incl all accessories such as corner, cleat, carraige bolt, gasket and appropriate sealant on longitudinal joint etc complete of size 24 gauge.

M & L in repair for duct insulation with resin bonded fibre glass wool roll of density 24 Kg/Cum, with factory laminated aluminium vapour barrier, thickness of insulation 50 mm all as specified and including the following :-

(a) M & L for cleaning the duct surface (to be insulated) by scrapping carefully with wire brush etc. to make the surface completely free of milllscale, dirt, dust, grease and other foreign materials, taking special care so that all duct joints are sealed against any leakage.

(b) M & L for applying rubber based adhesive CPRX compound.

(c) M & L for sealing of all longitudinal joints and circular overlaps with and including aluminium foil tape 50 mm wide, to make the insulation leakproof.

(d) M & L for securing the insulation with and including mechanically fastened nylon / steel straps of size 12 mm / 50 mm at maximum intervals of 1.2 mtr.

M & L in repair for duct insulation with resin bonded fibre glass wool roll of density 24 Kg/Cum, with factory laminated aluminium vapour barrier, thickness of insulation 40 mm all as specified and including the following :-

(a) M & L for cleaning the duct surface (to be insulated) by scrapping carefully with wire brush etc. to make the surface completely free of milllscale, dirt, dust, grease and other foreign materials, taking special care so that all duct joints are sealed against any leakage.

(b) M & L for applying rubber based adhesive CPRX compound.

(c) M & L for sealing of all longitudinal joints and circular overlaps with and including aluminium foil tape 50 mm wide, to make the insulation leakproof.

(d) M & L for securing the insulation with and including mechanically fastened nylon / steel straps of size 12 mm / 50 mm at maximum intervals of 1.2 mtr.

M & L in repair for Acoustic lining to the ducting by using FG Crown 200 x 25 mm thick rigid board density 32 Kg/cum covered with and 28 gauge aluminium. Perforated sheet and using GI nuts, bolts and washer for the entire duct etc complete all as specified and directed.

Supply and fix in repair duct/wall mounted fire dampers 16 C.G.I Sheet with fusible plug as specified and directed by engr -in- charge.

Supply and fix in repair aluminium aerofoil volume control dampers complete as specified and directed by Engineer-in-Charge.

M & L in repair for powder coated extruded aluminium supply/return air grilles all as specified.

Cleaning of cooling coil and air filters of Air handling units installed at Air conditioning plant by removing air filters and fixing back after cleaning with air blower, water and cleaning agent. Cleaning of cooling coil with wire brushes and air blower and water spray pump after spraying cleaning againt of make Scal Gun AL or equivalent chemical suitable for aluminium fins and all as specified and directed and Straightening the fins of cooling coil using suitable brushes as specified and directed for following capacity of Air Handling Untis. :-

(a) 2500 CFM to 5000 CFM

(b) 5500 CFM to 11000 CFM

(c) 12000 CFM to 18000 CFM

(d) 19000 CFM to 25000 CFM

9. M & L for repairs to leakages/damaged cooling coil by blocking / by passing the corroded/ leakaged tube of DX coil, involving following activities.

(i) Removing the cooling coil from Air Handling unit and transport to the contractor/approved workshops.

(ii) Leakage testing of the DX coil using nitrogen gas and finding the leakage tubes.

(iii) Blocking / By passing the leakaged copper tube and connect the copper tube with suitable new U bends etc by brazing.

(iv) Straighten the fins of cooling coil using suitable brushes.

(v) Painting of cooling coil with two coats of aluminium paint.

(vi) Reassembling the cooling coil to the Air handling unit and again testing with nitrogen to the complete system for 08 hours for following capacity of the Air handling Units. :-

(a) 2500 CFM to 5000 CFM

(b) 5500 CFM to 11000 CFM

(c) 12000 CFM to 18000 CFM

(d) Above 18000 CFM and upto 25000 CFM

M & L for repairs to chiller of AC plant by blocking the damage/corroded tubes involving following activities :-

(i) Disconnecting the side covers fo the chiller and the chiller valves from their existing positions.

(iii) Leakage testing of the chilller using pressurized nitrogen gas and finding the leakaged tubes.

(iii) Blocking the damaged/leaked tubes by brass plugs.

(iv) Re-fixing the side covers of the chiller and the chiller valves from their existing positions with new nuts, bolts, rubber gasket and washer.

(v) Testing the system for any leakage by using pressurized nitrogen gas and by vaccumising the system.

(vi) Preparing the damage surfaces of chiller as per exisitng including repairs to damaged insulation and painting as per exisitng shade for following capacities of chillers :-

(a) up to 15 TR Capacity

(b) 16 to 25 TR Capacity

(c) 26 to 50 TR capacity

(d) 51 to 90 TR capacity

M & L for repairs to condenser of AC plant by blocking the damaged/corroded tubes involving following activities :-

(i) Disconnecting the side covers of the condenser from their existing positions.

(ii) Leakage testing of the condenser using pressurised nitrogen gas and finding the leaked tubes.

(iii) Blocking the damaged/leaked tubes by brass plugs.

(iv) Re-fixing the side covers of the condenser and the condenser valves from their existing positions with new nuts, bolts, rubber gasket and washers etc and painting the surface with approved shade of synthetic enamel paints for following capacities of condenser :-

(a) up to 25 TR Capacity

(b) 26 to 50 TR capacity

(c) 51 to 130TR capacity

Note:- For item nos 9,10,11 Identifying of isolation leakage and rectification of the leakage is considered in quoted rates of item nos 9,10,11.

Supply & replacement in repairs Pedestal bearing P-208 heavy duty of make: NTN/SKF/TATA or equivalent

Supply & replacement in repairs Pedestal bearing P-207 heavy duty of make: NTN/SKF/TATA or equivalent

Supply & replacement in repairs Pedestal bearing P-206 heavy duty of make: NTN/SKF/TATA or equivalent

Supply and fix regenerable coarse type AHU filter of size 60cm x 60 cm x5 cm

Supply and fix regenerable coarse type AHU filter of size 60cm x 50 cm x 5 cm

Supply and fix regenerable coarse type AHU filter of size 60cm x 40 cm x 5 cm

Supply and fix regenerable coarse type AHU filter of size 60cm x 30 cm x 5 cm

Supply and fixing in repair CI Non return valves PN 1.) with matching flanges, hardware all as per IS : 5312 and as specified and directed of following sizes, Make : AUDCO/PILOT/POPULAR

(a) 65 mm bore

(b) 80 mm bore

(c) 100 mm bore

Supply and fixing in repair CI Pot Strainer/ Y Stainer with matching flanges, gasket, hardware all as specified and directed of following sizes, Make : SHITAL/HAMMER/NISHA :-

(a) 80 mm bore

(b) 100 mm bore

Supply and fixing in repair butterfly valve with matching flanges, gasket, hardware all as specified and directed of following sizes, Make : Zoloto/ Leader/ Kartar or equivalent all as specified and directed:-

(a) 65 mm bore

(b) 80 mm bore

(c) 100 mm bore

Supply and fix in repairs protection caps made out of GI Sheet of thickness 1.6 mm with three GI strip supports of size 25x3mm for fixing with the Cooling Tower including GI nuts & bolts for fixing all as specified and directed

Supply and fix in repairs cooling tower header with necessary nozzles etc complete all as specified and directed.

Supply and fix in repairs Auto capacity regulator solenoid valve of Make : Rotex/AVCON/ACCEL 220V, 50Z or equivalent in Avcon, Accel cat part No 50 including connecting of interlock wiring, nut, bolt, wahser etc all as specified and directed by Engineer-incharge

Supply and fix in repairs Coil for solenoid vlave SP-180 cat part No 50-A of Make : Accel, Sporlan, Rotex connecting into liquid line including interlock wiring, nut, bolt , washer etc all as specified and directed by Engineer-in-Charge.

Dismantling the existing AHU-09. complete with top panel side pedestal bearing MS fans MS scrolls shaft bottom trays of coil and fan section cooling coil motor and drive system filter including thermal insulation and re-assembling the same after carrying out repairs/replacement with new MS fans, MS scrolls , MS shafts, bearing plates, pedestal bearing, bottom trays for fan section, bottom tray for coil section complete all as per manufacturer's instructions all as directed and specified by Engineer-in-Charge .

Dismantling the existing AHU-11. complete with top panel side pedestal bearing MS fans MS scrolls shaft bottom trays of coil and fan section cooling coil motor and drive system filter including thermal insulation and re-assembling the same after carrying out repairs/replacement with new MS fans, MS scrolls , MS shafts, bearing plates, pedestal bearing, bottom trays for fan section, bottom tray for coil section complete all as per manufacturer's instructions all as directed and specified by Engineer-in-Charge .

Dismantling the existing AHU-12 completely including top panel, side pedestal bearing, MS fans, MS scrolls shaft , bottom trays of coil and fan section cooling coil , motor and driven system, filter including thermal insulation and re-assembling the same after carrying out repairs/replacement with new MS fans, MS scrolls , MS shafts, bearing plates, pedestal bearing, bottom trays for fan section, bottom tray for coil section complete all as directed and specified by Engineer-in-Charge .

Note :- Sl item No 26, 27 and 28 :- Cost of new materials/spares replaced will be measured and paid separately under respective items. However cost of minor/misc items which are not show separately in the Sch which are essential for reconditioning the AHU's shall be deemed to be deemed to be included in the above quoted rates. Fixing charges shall be deemed to be included in the quoted rates.

Supply and fix in repair bottom tray for fan and coil section made out of MS sheet 16 gauge duly painted with two coat of synthetic enamel gray paint over a coat of red oxide primer with 25 mm thick thermocoal insulation covered with tarfelt all as specified and as directed for AHU-09

Supply and fix in repair bottom tray for fan and coil section made out of MS sheet 16 gauge duly painted with two coat of synthetic enamel gray paint over a coat of red oxide primer with 25 mm thick thermocoal insulation covered with tarfelt all as specified and as directed for AHU-11

Supply and fix in repair side panels with bearing plate for fan section made out of MS sheet 16 gauge duly painted with two coat of synthetic enamel grey paint over a coat of red oxide primer all as specified and as directed for AHU-9

Supply and fix in repair side panels with bearing plate for fan section made out of MS sheet 16 gauge duly painted with two coat of synthetic enamel grey paint over a coat of red oxide primer all as specified and as directed for AHU-11

Supply and fix in repair side panels with bearing plate for fan section made out of MS sheet 16 gauge duly painted with two coat of synthetic enamel grey paint over a coat of red oxide primer all as specified and as directed for AHU-12

Supply and fix in repair back panel made out of MS sheet 16 gauge duly painted with two coat of red oxide primer and coat of grey enamel paint all as specified and as directed for AHU-09.

Supply and fix in repair back panel made out of MS sheet 16 gauge duly painted with two coat of red oxide primer and coat of grey enamel paint all as specified and as directed for AHU-11.

Supply and fix in repair MS shaft suitable for type AHU-09

Supply and fix in repair MS shaft suitable for type AHU-11

Supply and fix in repair MS shaft suitable for type AHU-12

M & L for shock absorbing rubber pads in repairs at the bottom of the AHU unit for absorbing shocks and vibrations, heavy duty of size 150mm x 150mm to match with the existing

40. M & L in repairs Strip heater finned 2 inch wide alluminised steel fins of 415 volt 1.5 to 3 KW capacity to match with the existing

M & L for thermal insulation to chilled water line, ducts, chillers, suction pipe with one coat of bituminous paint , polythelyne sheet, fiberglass wool insulation upto 50 mm thick , wiremesh and cover with 24 SWG aluminium clading complete all as directed by Engineer- in -charge

Supply and fix MS fan 18" x 18" suitable for AHU 12, AHU 11and AHU 9 duly painted with two coat of synthetic enamel paint delight in colour and one coat of red oxide 'primerall as specified and directed.

Supply and fix distributor of cooling coil suitable for AHU 9,11,12 with necessary copper tube including cutting brazzing and testing with nitrgen gas complete all as specified and directed.

Supply and fix in repairs pressure gauge of range -30-150 of make M/s Fiebig/ INDOFOS/ Uday or equivalent all as specified and directed.

Supply and fix in repairs pressure gauge of range 0-200 of make M/s Fiebig/ INDOFOS/ Uday or equivalent all as specified and directed.

Supply and fix in repairs pressure gauge of range 0-300 of make M/s Fiebig/ INDOFOS/ Uday or equivalent all as specified and directed.

Supply and fix in repairs in repair toggle switch of 5 Amp capacity of make M/s Kaycee or equivalent make M/s Legrand / HPL all as specified and directed.

Supply and fix in repairs in repair on-off push button pendants with elements red/green/orange of make MIMIC/ M/s L&T/ Legrand / HPL all as specified and directed.

Dismantling of 7.5 HP electric motor taking down carefully and transporting to workshop.Dismantling of motor's starter and rotor rewinding of electic motor with copper enamelled wire of GS gauge as per existing and prioring insulation towith stand on working pressure 415V applying varnishing overing eyc reassembling testing to achieve rated RPM complete all as specified and directed. Transporting back & reinstallation of 10HP motor and testing the RPM on full load to the entire satisfaction of engineer-in- charge.

Dismantling of 10HP electric motor taking down carefully and transporting to workshop.Dismantling of motor's starter and rotor rewinding of electic motor with copper enamelled wire of GS gauge as per existing and prioring insulation towith stand on working pressure 415V applying varnishing overing eyc reassembling testing to achieve rated RPM complete all as specified and directed. Transporting back & reinstallation of 10HP motor and testing the RPM on full load to the entire satisfaction of engineer-in- charge.

S & F in repair installation informatory boards at E/M installation to display the technical details i.e.(Type of AC plant, capacity, Design condition, Date of installtion, Installed by, Compressor type, Compressor motor, Condensor motor, AHU motor, cooling tower motor, AHU motor and if chilled water type chiller motor) of AC plant made out of 3mm thick aluminium composite panel (ACP) fully covered with white/green/blue (as required) Retro Reflective sheeting of Nikkalite Brand Ultralie (UL) grade with using pressure sensitive adhesive and Retro Reflective cut out border and messages in the sensitive adhesive, size of the board 150 cm x 120 cm fixed on wall above 1.2 mtr above ground level with & including proper fixing arragement complete all as specified and directed. Note : Technical details as per direction of Engr-in-charge.

S & F in repairs First Aid Box at E/M installations to keep the first aid items i.e. Tube of bernol, Bandage, one small snizer, banded etc, the box made out of GI sheet of 18 gauge of size 30cm X 25cm x 20cm with openable window & writing letters "FIRST AID" with thick red paint and fixed on wall at height not less than 2 mtr complete all as directed and specified by Engineer- In- Charge.

S & F Rotational moulded polyethylene water storage tanks capacity 2000 Ltr (cylindrical vertical with closed top) hoisted and fixed in position, taking down old unsv pvc tank complete all as specified and directed by Engr-in-charge.

S & F Rotational moulded polyethylene water storage tanks capacity 5000 Ltr (cylindrical vertical with closed top) hoisted and fixed in position, taking down old unsv pvc tank of Make: Syntex/ Polycon / Kavericomplete all as specified and directed by Engr-in-charge.

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