SPECIAL REPAIR FOR REPLACEMENT OF BER HOT WATER BOILER ALONGWITH CONNECTED WORK AT AF STN LEH

Supply, fixing, commissioning and testing of hot water generator capable of delivering a heat output 1,00,000 KCal/Hr using HSD oil with out let temp 90-95 degree celcius and efficiency more than 90% complete in all respect, including following item of work: (a) Heater unit : Heat exchanger, consisting of closely wound, helical, concentric coils, arranged to give adequate No of passes on flue gas and made of ERW tubes, conforming to IS 3059 Part-I, suitable for high temperature all as per manufacturer's design and or required head and capacity. (b) Pressure jet burner : Suitable for light oil firing with stepless modulation mechansim all as per manufactures design and of required head and capacity. (c) Combusion air fan with drive motor assembly all as per manufacturer's design and of required head and capacity. (d) Control Panel: Dust protected pre-wired unit mounted air cooled control panel housing a burner management system, switchgear consisting of contactor overload relays, fuses and MCBs etc, all as per manufacturer's design and of required capacity. (e) Circulating pumps. Centrifugal water circulating pumps suitable for high temperature operation coupled with electric motor drive, mounted on common base frame all as per manufactures design and of required head and capacity. (h) Fuel Pump: with drive motor assembly all as per manufacturer's design and of required head and capacity. (j) Oil Line: With duplex filters on fuel line at the inlet of fuel pump. Y strainer on fuel line between fuel pump and burner, non return valve on fuel pump outlet and bypass line, non return valve on modulation and circulation line, fuel oil regulation valves for burner modulation, burner solenoied valve, fuel oil pressure gauge at burner inlet, fuel pressure gauge on bypass line etc all as per manufacture design and required heat and capcity. (k) Burner programmer with matching flame sensor all as per manufacturer's design (l) Hooter mounted on control panel for auidible safety alarm all as per manufacturer's design (m) Temp indicator cum switch for high stack temp alarm for flue gases all as per manufacturer's design.(n) Chimney: 10 mtr heigh chimney above building roof made out of 3mm thick MS sheet including flue gas duct all as per manufacturer's design. (o) Design and installation of Diesal fuel storage tank of capacity 500 ltr made out of 5mm thick MS sheet complete with supply arrangement for topping up of service tank including lifting pump set suitable, control/drain valves complete, all as specified and as directed. (p) Supply and installation of pump set with motor electric driven reciprocating type of 3 HP motor with suction and delivery of size 50x40 mm complete all as specified and directed -2 Nos NOTE:- All interconnections of water lines between storage tank , boiler units, fuel lines interconnection including necessary fittings/ accessories with in plant room is deemed to be with in scope of work.

Supply and installing Pumping sets, centrifugal, electric driven, 3 phase, 415 volts of suction x delivery (50x40mm) , 3000 RPM Head 36-51 mtrs and discharge 260-120 complete upto 5WHP complete including Suitable starter & PCC foundation as per manufacturer's recommendation, complete all as specified and directed.

Supply and fix gun metal, gate valves of 50mm dia ISI Marked , with iron wheel head, screwed both ends for GI pipe complete all as specified and directed.

Suuply and fix of Hot water tank cylinderical made out of MS sheet 10 mm thick of capacity10000 Ltr complete with inlet hot water from boiler the tank shall be provided with flanges as per the site requirement for inlet and outlet connection complete all as specified and directed.

S&F PUF insulation of 50mm thickness with 40kg/m3 density including 26SWG plain Aluminium clading for steel tank of capcity 10000 Litres complete all as specified and directed.

S & F cast iron air release valves ISI Marked with single air outlets, conforming to IS 14845 of size 50 mm dia bore and fixing up in cast iron water supply mains of size 50mm dia complete all as specified and directed.

Supply, Installation, commissioning and testing LT panel indoor cubical floor mounted type made out of 2.00 mm thick CRCA sheet duly powder coated complete with Aluminium bus bar having rating of 1.5 times of incoming ACB duly mounted on epoxy based post insulators for 3 phase 4 wire 415 volts 50Hz power supply system fixed on angle iron of size 50mmx50mmx6mm, panel embedded in 40mm thick PCC 1:2:4 type B-1 (using 20mm graded crushed stone aggregate) and suitable to accommodate and including the following:- (a) MCCB, 4 pole, 63 Amp, 50 Hz, 415 V with rupturing capacity 16 KA (Incommer) - 01 Nos Outgoing (b) MCB, TPN 40 Amp, 415 V - 03 Nos (c) MCB SPN, 32 Amp, 16 KA-01 Nos (d) Indicating Lamp LED type (RYB) (e) Multi-functional meter digital type with in built selector switch incl. CTs & PTs (f) Single phase preventer for each outgoing - 02 Nos (g) Star Delta starter with protection for motor upto 5.0 HP-02 nos (h) Phase Sequencer-02Nos

M&L for Earthing complete with galvanised steel earth plate electrode 60cmx60cmx6mm thick buried directly in ground (earth pit not less than 2.25 M deep below normal ground level) with top edge of plate not less than 1.5 M below normal ground level, connecting to the Galvanised iron earth strip 32x6mm size by means of bolts, nuts, check nuts and washers of galvanised iron and earth strip protected by provision of GI light grade pipe 40mm bore including provision of concrete pit in PCC (I:2:4) type B-1 using 20mm graded stone aggregated with 40mm thick cover of RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg/Sqm) and frame of angle iron 40x40x6mm with lugs 02 Nos and handle of 6mm dia MS bar made to shape, GI light grade 20mm bore pipe for watering, perforated at bottom and connecting to earth test point all as specified

Supply,laying,jointing and testing, fixing to wall using clamps/pole/floor or in air or passing through pipes /ducts /road/path/ drain, laid in trenches, 1100 volts grade heavy duty electric cable XLPE insulated,screened ,PVC bedded, galvanised steel wire or wire armoured with electric power cable 1100 volts grade with stranded aluminium conductor of size 4 core 25 sqmm ISI marked ( IS - 7098 Part-1) and its latest amendments complete all as specified and as directed by Engr-in-Charge.

Excavation in trenches in hard/dense soil not exceeding 1.5 meter wide and not exceeding 1.5M in depth for laying of cables and getting out of excavated material complete all as specified and directed by Engineer-in-Charge.