SPECIAL REPAIR/REPLACEMENT AGAINST BER BOILER AND VOLTAGE STABILIZER AT AF STN THOISE

Taking down old unserviceable Hot water boiler of capacity 1,00,000 K cal/Hr including pumps, LT Panels etc and depositing in MES store at New Power House and as directed by Engr-in-Charge.

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 Celsius and efficiency more than 90% , Horizontal (skid mounted), smoke tube, reverse flame with min 03 Nos of passes with flow rate of 2500 LPH, working pressure 6 Kg/cm2. The inner shell shall be made of carbon steel and outer shell shall be made of Mild steel, front and back door shall be lined with high grade insulation and refractory, Pressure relief valve, in/out pressure gauge with ball valve, Inlet and Outlet temperature controller, Pressure Switch, Water and flue high temperature cut out, Hour-meter complete in all respect, including following item of work: (a) Heater unit : Heat exchanger horizontal (skid mounted), smoke tube, reverse flame, consisting of closely wound, helical, concentric coils, arranged to give 03 No of passes on flue gas and made of carbon steel confirming to BS 3059, PART-I, ST 320, ERW), suitable for high temperature all as per manufactures design. (b) Pressure jet burner : Highly efficient with low noise, Suitable for light oil firing with steeples modulation mechanism all as per manufactures design and of required head and capacity. (c) Combustion air fan with drive motor assembly all as per manufactures design and of required head and capacity. (d) Control Panel: Dust protected control panel made of 2 mm thick CRCA sheet finished with baked enamel paint, prewired with main incomer, indicator lights, hours meter, relay, fault indicating lights such as high temp of water, burner trip at high temperature of flue gasses with audio alarm , burner management system, switchgear consisting of contractor overload relays, fuses and MCBs etc, all as per manufactures 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. ( Capacity of pump should not be less than 2 HP ) (f) Fuel Pump: Fuel pump of suitable capacity with drive motor assembly for topping of diesel from barrel to diesel tank all as per manufactures design and of required head and capacity.(j) Hooter mounted on control panel for audible safety alarm all as per manufacture design (k) Instrument, Controls and Safeties (1 set) - Temp indicator cum controller with 2 set points, one for burner On Off control and the other for safety for high outlet water temperature. NOTE:-1. 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 included in scope of work and dimension of all parts are as per recommendation of approved OEM. 2. Before starting the work contractor will submit the complete drawing /design and technical specification /data of Govt/ Public Sector approved OEM for approval of GE / Accepting Officer 3.The water storage tank shall meet all the relevant IS provisions/ extant codal provisions. Suitable safety arrangement shall be provided for safe operation of the equipment. 4. PCC foundation as per the manufacture specifications shall be provided and the rates are deemed to be included in the quoted rate. 5. The hot water generator should be suitable for operation at ambient environment conditions of Thoise (Ladakh) where ambient Temp drops to around (-) 20C during winter. (6). The outlet temprature of thermic fluid (water plus glycol) mixture at 50% by 50% valve from boiler shall be 90 C and temprature difference (delta T) shall be around 11C suitable to generate the desired heat as per specify capacity. 7. Thermic fluid pump shall be of minimum 1.5 KW incluyding suiltable discharge and head as per manufacturer guidlines. 8. Anything as per manufacturer requirement for efficeint working of teh system contains deemed to incl this while quoted rate.

Supply and fix Voltage stabilzer, 3 phase for automatic operation, servo controlled unbalanced type three phase, oil cooled, indoor type & designed for input variation between 300V to 480 V with output voltage stabilzed at 415 with accuracy +_1% and speed of correction 8 Volts per Second and of capacity b20 KVA.

Supply and fix Voltage stabilzer, 3 phase for automatic operation, servo controlled unbalanced type three phase, naturally oil colled, indoor type & designed for input variation between 300 V to 480 V with output voltage stabilized at 415 with accurancy +- 1% and speed of correction 8 Volts per Second and of capacity 30 KVA.

Excavation in trench n. Exc 1.5 mtr wide and n.exc 1.5 mtr deep for foundations of poles/ stays/cable etc not exc 10 Sqm area on plan and getting out in hard/Danse, soil complete all as specified and as directed by Engineer- in-charge

Returning filling in including spreading lavelling, watering and well ramming in layer each not exc 25 cm thick in a soft/ loose soil, complete all as specified and directed by engineer incharge

Removing surplus soil to a distance not exc 50 mtr and depositing where directed at a lavel not exc 1.5 mtr above the starting point complete all as specified and directed by Engineer incharge

M&L for PCC cable cover class LV, type 1, flat size 250 mmx 150mmx 40 mm laid flat in trenches over the cable with length 250 mm perpendicular to the direction of cable adjacent/abutting each other complete all as specified and directed Note:- excavation, and earthwork to be measured and paid for separately

M&L sand cushioning to protection of underground cable laid 8 cm before laying and 15 cm after laying of cable and punned to form an overall layer of 18 cm thick, complete all as specified and directed by Engineer - in-charge Note and thickness cell be measured

M&L for in repair/ replacement, XLPE insulated ISI marked screened, PVC bedded, galvanised steel strip or wire armoured heavy duty electric cable with aluminium conductor, 1100 Volts grade, cross-sectional area 95 sqmmx3.5 core, laid in trenches or passing through pipes, including suitable lungs and accessories for making connections at both ends, complete, all age specified, and as directed

M&L for in repair/ replacement, XLPE insulated ISI Marked screened, PVC bedded, galvanised steel strip or wire, armoured, heavy duty electric cable with aluminium conductor, 1100 Volts, grade cross-sectional area, 25 Sqmmx 4 Core laid in trenches or passing through pipes, including suitable lugs and accessories for making connections at both ends, complete all specified and as directed

Supply installation, testing and commissioning of earthing complete with galvanise steel, earth plate electrode, 60 cmx60cmx6mm 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 32× 6mm size by means of bolts nuts, Check nuts and washers of galvanised iron and earth strips protected by provision of GI light, grade pipe 40mm bore including provision of concrete pit in PCC (1:2:4) type B1 using 20 mm graded stone aggregate with 40 mm thick cover of RCC (1:2:4) reinforced with XPM (weight, not less than 4 Kg/ sqm) and frame of angle iron 40x40x6mm with lungs, 02 Nos and handle of 6MM Dia MS bar made to shape, GI light grade 20 mm bore pipe for watering, perforated at bootom and connecting to earth test point all as specified and directed by Engr-in-Charge.

Supply installation, commissioning and testing of factory made CPRI approved LT panel indoor type made out of CRCA seat 2mm thick frame factory fabricated with front and back openable double door with locking arrangement, with MS angle Section 50 x50x6mm support duly powder coated having thickness not less than 100 microns provided suitable gasket to make it dust and vermin proof suitable for 3 Phase 4 wire, 415 Volts, 50 Hz, AC supply system floor, mounted and grounding the legs of panel in PCC foundation, 1:4:8, complete all as directed suitable for and including the following:- INCOMERS (a) Bus bar TPN copper bus bars of minimum 100 A capacity (b) Change over Switch 63 Amps, 415 Volts, 4 pole (on load) =01 (c) MCCB 63 Amps, 415 Volts, 16 KA, 4 pole, thermal magnetic release- 01 No for for incoming (Extended Rotary operating handle, Phase spreading link and Phase barriers) OUTGOINGS (a) MCB 32Amp,10 KA, TPN with ammeter - 04 Nos for Boiler Pump (b) DOL starter for Diesel Pump and Glycol Recirculating pump-04 Nos (c) MCB 20 Amp-01 Nos for Pumps (d) Ammeter -01 No for Pumps (e) Digital Volt and Amp meter -01 Nos each (f) RYB Indicator -03 Nos (g) Space for fixing MCB/MCCB/Starter -02 Nos

Note : Schedule of credit for Rs. 10200.00 to be deducted on acceptance of bid.