82154 PROVISION OF CENTRAL HEATING SYSTEM FOR VARIOUS PRE FAB BILLETS AT AF STN THOISE

Supply, Installation, Commissioning and Testing of complete Heating Plant including Boiler Unit (Smoke tube), chimney, oil storage tanks, glycol expansion tank, glycol makeup tank, gear pumps and glycol circulating pumps complete with all accessories to achieve desired temp 23 +/- 2 deg celcius through out the year with humidity control to maintain relative humidity 50% +/- 5% and suitable dust filteraton upto 15 micron and conditioning satisfying those mentioned in enclosed user data sheet in thoise winter climatic condition as per Appx attached including following items of work :- Thermal glycol oil fired boiler (01 Working +01 Standby) : Supply, installation, commissioning and testing of pressurised type 3 phase reverse flame horizontal / horizontal smoke tube arrangement ,each of capacities not less than 1,00,000 KCal/Hr complete in all respect, with standard accessories to meet the required condition of Thoise station with temp and humidity criteria for Pre-Fab building complete in all respect in the conditioned space as defined in the reference list of drawings and satisfying conditions as mentioned in the enclosed user data sheet as per Appx with combustion chamber and equipment , automatic monoblock burner assy, fire tubes, control panel with sequence controller , photocell for frame failure , HT transfer combustion chamber and equipment automatic monoblock burner assy, fire tubes, control panel with sequence controller, photo cell for flame failure, HT transfer electrode blower assy, electrical panel, mounting frames, pressure gauge at inlet and outlet suitable operation on 50Hz three/single phase AC supply complete.

The Boiler minimum specifications should be as under : (a) Heater unit:-Heat exchanger ,consisting of closely wound, helical concentric coils double jacketed arranged to give adequate no. of passes on flue gas side & made out of ERW tubes confirming to BS 3059 Pt-I suitable for high temperature all as per manufacturer design and of required head and capacity . (b) Pressure jet burner:-Suitable for light oil firing with stepless modulation mechanism all as per manufacturer design and of required head and capacity. (c) Combustion air fan with drive motor assembly all as per manufacturer 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 contactors, overload relays, fuses and MCB etc. all as per manufacturer design and of required capacity. (e) The boiler shall be installed in system of (1Working+1Standby). (f) The tenderer should get the plant installed by any of the original equipment manufacturer with recommended makes of compatible components of items. (g)The cap of boiler has been designed for maintainingg the inside temp of 23 +/- 2 deg celcius for an ambient drop to -25 degre celcius. (h)The boiler inner shell be made from carbon steel with dished ends (curved type) with thickness as per boiler design of OEM. (i) The boiler shall meet or exceed the Minimum FUE of 80%. (j)Outer shell be made from carbon steel with thickness as per boiler design of OEM. (k) Boiler tube shall be seamless MS tube for quality commensurate with the boiler requirement . (l) The front door shall be openable lined with high grade insulation and refactory. (m) High efficient, low noise imported monoblock burner (Benton/Rello). (n) The boiler shall be insulated with 50mm thick resin bonded fibre glass wool and cladded with 22 guage GI sheet (epoxy pointed) or any other thermal insulation as per OEM design. (o) Pre wired control panel (made from 18 guage CRC sheet ) Main incomer, MCB in/out temperature controller (digital)fault indicating light for water high temp, burner trip,flue temp, with alarm, hour meter for maint schedule etc. (p) 1 set of oil piping from unit to burner . (q) It includes suitable concrete foundation for Boiler .

FLUE GAS CHIMNEY: Supply, Installation of Mild Steel flue gas chimney to accomodate emission of simultaneous running of 02 Nos of Boilers of cap 1 Lakh Kcal/Hr each made out of 3 mm thick mild steel sheet, minimum 3 mtr aboove the highest point of plant room as per manufacturer recommendations which ever is higher including connecttion to each boiler.

Day Oil Storage Tank: Supply , Installation,testing and commissioning of HSD oil day storage tank rectangular mild steel (IS2062) construction with capacity of 800 Ltrs complete with inlet, outlet, over flow drain and vent with flame arrestor. tank shall be made out of 4mm thick mild steel sheet and will be provided with supports made out of 50mm dia medium grade pipe to keep tank base at minimum 2500mm above finished floor level. The tank shall be provided with level switches for on - off operaton of transfer pump. Extra high level and extra low level alarm shall be provided along with gauge indicator duly callibrated. Tank and strructure shall be painted with synthetic enamel paint of appproved colour over one coat of primer complete all as specified and directedd by Engr in Charge Qty-01 Nos

Glycol Expansion Tank : Supply and Installation of overhead Glycol expansion tank of size (volume) 500 Ltrs made out of 5mm thick mild steel cylindrical tank complete covered with 13mm closed cell elastmetric insulation complete with removeable lid/in/out/drain/overflows system including mounting arrangement making connections etc complete all as specifeid and directed Note: The Glycol expansion Tank should be at a staging of 2 meter height in plant room and cost of foundation and staging material i.e angel iron frame/steel/chequered plate/MS pipe /flat iron/welding etc deemed to be included in the quoted rates.- 01 No.

Glycol Makeup tank: Supply and installation of 1000 ltr capacity MS tank made out of 5 mm thick mild steel cylindrical/ rectangular with removable lid, in/out/drain/overflows system mounting arrangement making connections etc complete all as specified and directed ISI marked.- 01 No Note : (i) Anything missed out above but required for smooth operation of central heating system is deemed to be included in quoted rate. (ii) The capacity of boiler given are minimum estimated , however on detailed calculation if the capacity needs to be enhanced for achieving the desired climatic condition mentioned in the contract , is deemed to be included in the quoted rate accordingly contractor is advised to quote their rate. No DO in this regard in future shall be admissible.

Transfer gear oil pump fuel (self priming): Supply installation testing and commissioning of self priming rotary gear transfer pumps off capacity 20 LPM at 10 Mtrs head for Kerosene or HSD oil complete with base mounting frame. PCC Foundation including holding down bolts , coupling guard and TEFC flame proof motor 1 HP and other accessories required for commissioning etc complete all as specified and directed-

Glycol Based Water circulation pump for Boilers:- Supply, installing , testing and commissioning of pumping system consisting of horizontal suction and delivery pump sets having stainless steel impellers capacble of delivering LPS of thermic/ethylene glycol water against 25 meter head at outlet and complete as per specificattion. The system shall comprise of the following. Centrifugal pumps with minimum 75% efficeincy, 225 LPM delivery at 25 mtr head including prime mover squirrel cage induction motor with TEFC enclosure and suitable power to drive the pump efficiently with class F insulation, operating on 415 +10% volts, 3 Phase , 50 HZ AC supply.

(i) Insulation of suitable thickness duly cladded by aluminium sheets off 0.5mm thickness and properly clamped to pumpset as per specifications required-01 Lot (ii) Mounting frame with antivibration pads for 2 Nos Pumpsets-01 Lot (iii) RCC cement concrete foundation for the pumping unit as per OEM . Make: Kirloskar/Grandfos/Calama/KSB/Jyoti Note : (i) Contractor/ bidder shall submit complete design for the central heating plant comprising of heat load assessment, air distribution network indicating location of each AHUs, FCUs, Grills, Diffuser, dampers etc., layout plan of pumps, boilers, chimney, tanks, electrical panels etc., with complete design/ calculations with supporting documents duly vetted by IIT/ NIT within one month from date of commencement of work. (ii) Cost of PCC/ RCC foundation required for all items viz boilers, chimney, pumps, tanks etc., as per recommendation of manufacturer shall be included in the overall rate quoted by the contractor. (iii) Anything missed out above , but required for smooth operation of central heating system is deemed to be included in the quoted rate. (iv) The capacity of pump given are minimum estimated , however on detailed calculation if the capacity needs to be enhanced for achieving the desired conditions in the conditioned space of the Pre-Fab Billet as brought at above is deemed to be included in the quotedd rate and accordingly contractor is adjusted to quote their rate. No DO in this reagrd in future shall be admissible.

HSD Oil piping system. Supply, installation,testing and commissioning of MS pipe heavy duty for HSD lines confirming to IS 1239 (part-I) 2001 including clamps, bends,reducers, flanges, nuts, bolts etc. complete with all respects of 40 mm NB complete all as specified and directed by Engineer-in-Charge.