PROVN OF CENTRAL HEATING SYSTEM FOR LIVING-IN ACCN AT AF STN THOISE

30˚ C) during winter.

Design, Supply, Installation and Testing and Commissioing of complete Central Heating System of boiler capacity each not less than 8,00,000.00 kcal /hr including but not limited to: fully automatic packaged Two boilers (1 working + 1 standby) with burners, flue/ chimney , refractory lining and safety controls,interlocks and flame supervision, hot water circulation pumps (2 working + 2 standby) with motors, valves, gauges and accessories complete piping and distribution network with MS/PERT/HDPE pipes, fittings valves, stainers, supports, hangers, thermal insulation and aluminium cladding, Fan Coil Units (FCUs) / Air Handling Unit with fans, coils, filters, drain pans, control valves, stainers and draining piping, electrical works including power & control cabling , MCC panels, starters, cable trays, earthing and associated items, control & instrumentation system comprising of sensors, thermostats, motorised valves, boiler/pump sequencing panels and safety interlocks, testing and balancing and commissioing of entire plants including hydrostatic tests, functional checks, performance tests to achieve required design conditions ( 22˚ C (±)2˚ C with RH 30-50% ) and submission of as -built drawings , O &M manuals, test certificates, training of staff and handing over in complete operational condition as directed by Engineer-in-charge.

Total amount of Schedule 'A' PART-I (BUILDING WORK)

Total amount of Sch 'A' PART-II (SEC-I)BUILDING WORK (TILING JOINERY) CONNECTED ITEM FOR RADIENT HEATING

Supply and fixing Lamp Holder including 10W Led Bulb, white Polycarbonate body, with back plate suitable for batten fittings fixed in position & connecting complete all as speicifed and as directed.

(k) Voltage regulator :- A rapid response digital automatic voltage regulator (AVR) with microprocessor based control compatible with CPCB-IV+ ECU for emission linked load management and shall be provided to regulate the generated volatage. The overall regulations from no load to full load including cold and hot variation and load power factor of 0.8 lag to unity shall be within 1% of the normal voltage. The excitaition system shall be designed to promote rapid voltage recovery following sudden application and disconnection of load. (l) Acoustic enclosure :- The acoustic enclosure should be supplied along with DG set from the manufacturer outlet itself as per latest CPCB norms. Acuoustic enclosure shal be powder coated and fabricated out CRCA MS sheet. The canopy shall have hinged doors one door with glass window to view proper parameters on control panel .The canopy and doors shall have inside lining of fire retardant foam/ glasswool as acoustic materials. The base frame shall be fabricated in ISMC channel or in sheet metal with lifitng hooks for convenient lifting to complete set i.e. along with canopy engine and alternator. The sound level shall have less than 75dB(A) at a distance of 1 meter, but must be certified for CPCB-IV+ compliance by OEM. High quality noise absorbant and fire retardent grade acquastic insulation material (P.U.foam) complying IS: 8183. The allowable temperature rise inside canopy is 5 to 7 ˚ C. The measurement of noise should be as per ISO 3744/ ISO 8528(Part-10) standards. The canopy has the provision of emergency push button external to canopy. Note:- The acquostic enclosure shall be made by the OEM of original engine manufacturer.

(a) Boiler and Heating plant : (aa) Design, Supply, installation, testing and commissioing of Two Oil- fired Boilers (1working +1 Standby), each with capacity of 8,00,000 kcal /hr (931kW) complete with automatic dual fuel burner (oil /gas compatible), PLC based control panel with touchscreen, safety valves, pressure guage, thermometer, feed water pump integration and thermal insulation (50mm rockwool with aluminium cladding ). Each boiler shall have a stainless steel heat exchanger, efficiency > 85% ( as per ECBC Table D-9) and comply with IS : 10496: 1983 and IBR regulations. including foundation ,mounting bolts and vibration isolators adn inconnnecting valves for standby operation. suitable for -30˚ C ambient conditons. (i) Primary (Boiler) Loop : water : indoor, closed circuit water primary loop serving plate heat exchanger; hot water circulation pumps (duty+ standby) with TEFC motors, bases, couplings, suction and discharge isolating valves, check valves, strainers, pressure/ temperature gauges, flexible connectors and necessary headers /manifolds. (ii) Secondary (Glycol) Loop : Freeze Protection: Inhibited propylene glycol hydronic loop for all piping /coils at risk of sub-zero exposure, with design freeze protection to at least -35˚ C; plate heat exchanger between primary and secondary loops; dedicated glycol circulation pumps (duty + standby, VFD ready), hydrulic accessories (air + dirt seperators, deaerator / automatic air vents),glycol feeder / transfer unit and day tank, concentration kit/ports,and make up arrangements.

Sch 'A' Part-I (Section-I) ( Bldg Work) Note : This schedule is not pre priced by MES and the pre priced rate indicated as "Rs. 0.00" under Col.5 signifies this fact only

(b) MS pipelines for Boilers :- (i) Supply and laying of Mild steel (MS) seamless pipe (Schedule 40) for boiler main supply / return lines, 100 diameter including welding flanges , bends, and supports, Pipes to be insulated with 50mm rockwool and aluminium cladding suitable for 90˚ C water at 7 bar pressure over 250m. comply with IS 1239 :part I. (ii) Supply and laying of Mild steel (MS) seamless pipe (Schedule 40) for boiler exhaust / chimney lines connection per boiler, 150 diameter including expansion joints, dampers,flanges , bends, and supports, Pipes to be insulated with 75mm high temperature fiberglass comply with IS 3589. (iii) Supply and installation of MS pipe fittings (elbows, tees, reducer) for boiler pipelines including testing and welding.

(c) PERT Pipes and circulation system :- (i) Supply and laying of PERT pipes for hot water circulation , 32mm diameter PN 10 including fittings (elbows,tees, reducers) clamps and thermal insulation with vapour barrier and cladding; heat tracing and insulation for exposed lines, valves and drain/ condensate runs , closed cell foam, suitable for 90˚ C operation around 250m comply with IS 15450. (ii) Supply and laying of PERT pipes for hot water circulation , 25mm diameter PN 10 including fittings (elbows,tees, reducers) clamps and thermal insulation with vapour barrier and cladding; heat tracing and insulation for exposed lines, valves and drain/ condensate runs , closed cell foam, suitable for 90˚ C operation around 250m comply with IS 15450. Note : PE-RT pipe 25mm dia will be issued by Dept for fixing only (iii) Supply and installation of PERT pipe manifolds with flow control valves, balancing valves and stainers suitable for distribution to FCUs across 4 buildings.

(d) Fan Coil Units (FCUs):- (i) Supply, installation, testing and commissioning of wall mounted FCUs with heating coils only, complete with fan with capacity of 1.5kW each including 150CFM airflow (adjusted for 1.5kW) , 2 row copper coil galvanised steel casing, thermostatic control,and drip tray, filters, drain pans, 2-way/3 way motorised control valves, stainers, balancing valves, flexible connectors , coil freeze stats/ low temp cut out , drain piping to nearest point Suitable for -30˚ C ambient conditons comply with IS 1391. (ii) Supply and installation of FCU mounting brackets and flexible connectors for connection to PERT piping.

(e) Ventilation System and Humidification system:- (i) Supply and installation of dedicated ventilation unit with a capacity of 2500CFM including HEPA filter, preheater (10kW) and ducting (0.6mm GI, 25mm fibreglass insulation) to ensure minimum fresh air per NBC 2016 and ASHRAE 62.1 for 400 occupants. (ii) Supply, installation and commissioing of steam humidifier with a capacity of 50kg/hr ( to maintain 30-50% RH indoors) including steam generator, controls and piping integrated with ventilation system at 3048 m altitude. (iii) Supply and installation of supply air ducting (GI sheet, 0.6mm thick) sized 600mm X 400mm for main lines and 300mm X 200mm for branches including dampers, grilles and insulation with 25mm fibreglass for 2500CFM fresh air distribution over 250m comply with IS:655. (iv) Supply and installation of return air ducting (GI sheet, 0.6mm thick), sized 700mm X500mm for main lines and 400mm X 300mm for branches including dampers, filters and insulation with 25mm fibreglass for 73920CFM recirculation over 250m comply with IS:655

(f) Fuel System (Oil Fired) :- (i) Supply and installation of fuel storage tank (2000 liters capacity for dual boilers), double walled MS construction with level indicator, overflow pipe and vent, including foundation and bund wall for splill containment comply with IS 10987. (ii) Supply and laying of MS fuel oil pipeline (25mm diameter) from Tank to Boiler including filters , valves and insulation. (g) Chimney /Exhaust System : Supply and errection of self supported MS chimney (6m height , 300mm diameter) per boiler including guy wires and rain cowl, and insulation with 75mm high temperature wool designed for boiler exhaust comply with IS 6533

(h) Valves, Controls and Safety Devices :- (i) Supply and installation of gate valves (bronze, 25-100 mm diameter) for isolation in piping system. (ii) Supply and installation of pressure reducing valves and check valves in circulation lines. (iii) Supply and installation of temperature sensors, pressure sensors and flow meters and digital display integrated with control panel.Boiler and pump sequencing, differencial pressure/ flow control, temperature sensors, thermostats, fail safe valve action, low ambient/ freeze protection logic (pump run-on, alarm), interlock to prevent simultaneous heating and cooling, BMS/automation interface as required. (iv) Supply and installation of safety devices, flame failure detector, low wwater cut-off, high pressure switch and alarm system per boiler

(j) Electrical and Control System:- (i) Supply and installation of electrical control panel for dual boilers, pumps, FCUs and ventilation unit including MCCB and relays, timers,earthing and BMS integration wired to 415V, 50Hz supply with additional 50kW circuit for steam humidifier comply with IS 8623. (ii) Supply and laying of 4- core 10Sqmm aromoured copper cable for power supply to boilers, pumps, FCUs and ventilation units over 250mtr including termination and earthing comply with IS1554. (k) Water Treatement and Accessories:- (i) Supply and installation of water softner plant (capacity 2,000 Liters/hr for dual boilers) with resin, brine tank and automatic regenration to prevent scaling in boiler and pipes. (ii) Supply of chemicals for initial water treatment (anti-scalant, pH adjuster) and dosing system. (iii) Supply of tools and spares, wrenches , pressure gauges, test kits and spare kits (valves , gaskets, filters) for one- year operation).

(l) Civil Works :- (i) Construciton of RCC foundation for dual boilers (4mX2mX 0.5m depth) including excavation rainforcement and concreting (M20grade). (ii) Construciton of bund wall around fuel tank (1m high) with PCC flooring for spill containment. (m) Miscellaneous:- (i) Supply and installation of air vents, drain valves and stainers at strategic points in the piping system. (ii) Painting of all exposed MS pipes fittings and structures with two coats of heat resistant paint after priming .

(n) Testing and Commissioing : Testing and Commissioing of the complete central heating system including pressure testing of pipes and performance testing of dual boilers (8,00,000 kcal/hr output), Hydrostatic testing, flushing and chemical treatment compatible with glycol; verification of glycol concentration (target 45-50% PG or as approved) and freeze point, functional tests of boilers, pumps, valves and controls ; performance test to achieve specified indoor heating conditions, FCUs and controls with submission of test reports and as built drawings. (o) Training and O & M : Providing training to MES staff on operation and maintenance of the system includng O &M manual submission. (p) Vetting : Vetting of the complete Central Heating System design(drawings, load calculations, piping hydrulics ) by NIT/IIT including compliance certificate with IS 10496, IS 15450, SP 41:1987 and ECBC 2017with specific consideration for 3048 meter altitude and 30-50%RH.

Note for all items 1 (a) to 1(p) :- (i) Indoor design conditions : (+) 22˚ C (±)2˚ C with RH 30-50% (ii) Outdoor conditions: (-) 30˚ C (iii) Minimum Fresh air change : 5 CFM/ person (iv) Altitude above MSL 3048 meters (v) The tenderer should ascertain the correctness of heat load calculations and technical parameters based on the building plan outside/inside parameters adn design parameters as given in the tender and quote accordingly. (vi) The tenderer shall be responsible for the plant to meet the design condition round the clock 24X7X365 basis irrespective of the full load capacity given in the schedule, which is given not less than basis. (vii) The tenderer should get the plant installed by any of the original eq

Design and Construction of DG SET and CHS Room based on Architectrural Dwgs in RCC using M30 Grade of concrete and Fe 500 TMT bars as per IS:456 after conducting level survey & Soil Investigation by boring one borehole upto depth of 06 metre and assessing Soil Physical properties. Structural drawings shall be vetted from IIT/NIT and approved by the Accepting Officer.

'A' PART-III (SEC-II)( CENTRAL HEATING SYSTEM) Note : This schedule is not pre priced by MES and the pre priced rate indicated as "Rs. 0.00" under Col.5 signifies this fact only.

(ab) Supply and installation of boiler feed pumps (centrifugal type) with capacity of 15 m³/hr at 7 bar head, cast iron body with stainless steel impeller, including motor (7.5HP, 415V/50Hz) , coupling , base plate and non return valve,designed with altitude adjusted NPSH (3048meter) (2 working + 2 standby ) for dual boilers. (ac) Supply and installation of expansion tank (closed diaphram type) with capacity 1000 Liters including nitrogen pre-charge made of mild steel with epoxy coating , pressure relief valve and mounting brackets.

Total amount of Sch 'A' PART-IV (SEC-I) INTERNAL ELECTRIFICATION

Sch 'A' Part-III (Section-II) ( INTERNAL ELECTRIFICATION) Note : This schedule is not pre priced by MES and the pre priced rate indicated as "Rs. 0.00" under Col.5 signifies this fact only

Overall Total amount of Schedule 'A' PART-IV (INTERNAL ELECTRIFICATION)

Supply and fixing Bracket Made out of GI light grade pipe of size 40mm dia 1.5 metre long bend to an angle of 120 degree with 02 Nos MS clamp 50mmX50mm and 04 sets of nuts, bolts and washers painting with two coats of synthetic enamel paint over a red oxide primer complete all as directed and as directed by Engineer-in-Charge.

Supply, installation, tesing and commissioning of Diesel Engine Driven Genrating set of capacity 100KVA including but not limited to: Continuous net rating at 0.8 PF, 415V, 3 phase, 50Hz at site altitude 3048m AMSL and ambient 50˚ C and extreme climate (-20˚ C) , CPCB-IV+ compliant norms (MoEF &CC Gazette Notification effective 01 July 2023), self contained , skid mounted type with radiator cooling, control panel, fuel system, acoustic enclosure and all standard accessories, Noise standard ≤ 75dB (A) at1m, but must be certified for CPCB-IV+ compliance by OEM and Type approval & conformity of production (COP) certificate and derating factor certificate from OEM mandatory and must comply with real time emission monitoring provisions complete all as specified and directed comprising the following

(a) Diesel Engine : The Diesel engine shall be of four stroke cycle multi cylinder, direct injection water cooled,turbo charged , air to air aftercooling and optimised turbo charger for increased altitude capablities, developing suitable BHP@1500RPM under tropical condition 3048meter at MSL of BS 5514/ISO3046 with an over load capacity 110% for one hour in any specified 12 hours of continuous operation. The engine shall confirm to IS: 10000/10002/ IS 13364/IS 1460/ IS 13656 /BS:649/ BS 5514 and CPCB -IV+ emission limits as per MoEF & CC Notification GSR 804(E) and subsequent amendments. The engine shall have following accessories :- (i) cooling fan and radiator (ii) DM water cooling systems with pre mix anti-corrosive addetives. (iii) Turbocharger (iv) Flywheel with flywheel housing (v) Electrical engine starter motor (disengagement after start-up) with batteries (vi) Battery charging system (vii) Stainless steel exhaust flexible elbow (viii) Thermal sealing of exhaust pipe and aluminium cladding for complete exhaust pipe and silencer (ix) Required filters for fuel, lub oil, air etc (x) Sets of flexible houses as required (xi) Suitable rubber coupling to alternator with guard (xii) Suitable Engine controller for protection of the engine (xiii) Coolent heater and crankcase heater (xiv) Oil drain pump (xv) Heavy duty air cleaner etc.

(b) Engine Protection :- (i) High coolent temperature warning & trip (ii) Low lubricating oil pressure warning & trip (iii) Low coolent level waring and trip (iv) Fail to crack trip (v) Over crank trip (vi) High and low battery voltage alarm (vii) Clogged filter warning (viii) Lack of fuel (ix) High canopy temperature (x) set fail to start after sucessful three consecutive start attempts (xi) Electronic ECU with CPCB-IV+ diagnostic features for emmissions and engine health monitoring.

(c) Governer :- The Governer shall be of electronic type suitable for monitoring constant engine speed within the specified limits for parallel and auto load sharing operation shall comply with ISO 3046-IV governing class G2 /better. (d) Exhaust :- The exhaust piping system shall be supplied with a hosptial grade silencer and catalytic converter suitably optimised to meet stingent noise emission standards laid down by CPCB-IV+ emission compliant with built in catalytic coverter(DOC/DPF/SCR as per OEM design). The exhaust piping and the silencer shall be wrapped with rock wool and/or calcium silicate. The outside shall be neatly wrapped with aluminium cladding. The exhaust line shall be extended beyond the height of utility building roof as required by pollution control norms . Suitable supporting structure for installation shall be provided. Emission certificate from CPCB approved agency to be submitted at commissioning stage. (e) Hot air exhaust (Radiator cooling ):- As per OEM recommondation if sufficient exhaust for radiator is not available the contractor has to provide GI duct for hot air exhaust from DG set up to designed place of duct oulet. The duct shall be made of 14 gauge thick GI sheet including necessary civil work.Tropicalized radiator suitable for ambient up to 50˚ C, at altitude 100m;derating factor to be declared by OEM.

(f) Fuel Tank :- Inbuilt/ internal bottom mounted (within-in base frame) Diesel tank of suitable capacity with mounting brackets complete with fuel inlet,air vent drain plug, level indicator, internal connection pipes from tank to diesel generator as required, Suitable barrier shall be provided between Diesel tank and engine. The fuel tank shall be fabricated as per tropical conditons at 3048m above MSL with approx capacity or designed capacity shall be suitable for 8 hours full load condition or 14 hours of capac

ity of 75% load. In case the in built base frame tank is not capable to hold POL for 8 hours continuous opearation, contractor shall provide additional tank made of MS sheet capacity seperately as per manufacturer recommondations confirming to PESO norms & safety rules; return fuel line with seperator. (g) Starting system :- The engine starting shall be by means of totally enclosed axial type electric starter suitable for 12/24V volts DC starting comprising of starter motor, voltage regulator and arrangement for initial excitation complete with suitable number of batteries as per OEM specifications, sealed maintenance free batteries lead acid type confirming to IS 15549 (SMF/Lead acid) suitable for High altitude 3048m from MSL. The batteries shall be supplied with a suitable floor mounted MS stand treated with seven treatemnt, two coats of red oxide primer and acid resistant paint with wooden base, adaptor box etc with copper conductors battery leads of required length and socket / clamps.

(h) Alternator :- (i) 100KVA 3 phase 0.8PF, 415V, 4 wire 1500 RPM self excited and self regulated through electronic AVR confirming to IS:4722/BS: 2613 suitable for 3048m above MSL with brushless exciter housed in screen protected drip proof enclosure. The alternator shall be confirming to IS: 13364 Part-II & IS 15999 part-I /IEC 60034 Part-I and CPCB-IV+ requires low THD (<3%) capable of delivering rated output at rated power factor 0.8 with a terminal volatage differing from the rated value by not more than +/- 5%. (ii) Frequency differing from the rated value by not more than +/- 0.5%. (iii) short circuit capacity of 300% for 10sec. (iv) Over load capacity of 110% for one hour. The insulation class for the alternator shall be H class. The temperature rise shall be limited to class B and ingresses enclosure protection shall be IP23 or better. The output terminals of each alternator shall be connected to an MCCB of suitble capacity microprocessor based, adjustible type through a cable system. The control panel shall be housed inside the acquostic enclosure. (j) Alternator protection :- Alternator protections to comply with IEC 60255 standards and should have following protections- (i) Over and under voltage (ii) under and over frequency waring and trip (iii) Loss of excitation (iv) Over current and Earth fault and short circuit protection (v) Unbalanced loads (vi) Restricted Earth fault protection (vii) Differencial protection (vii) Diode Failure.

Total amount of Sch 'A' PART-V (SEC-I) External Water Supply

Total amount of Sch 'A' PART-VI (SEC-I) External Electrification

Sch 'A' Part-III (Section-II) External Electrification Note : This schedule is not pre priced by MES and the pre priced rate indicated as "Rs. 0.00" under Col.5 signifies this fact only

Supply, installation, testing and comissioning of factory made, CPRI approved LT panel suitable for 415V, 3 phase , 4 wire, 50Hz AC system, floor mounted, indoor type,designed for operation at altitude upto 3048m above MSL and for low temperature winter conditions (ambient upto -10˚ C), including necessary anti condensation heaters with thermostat. Panel shall be made of CRCA sheet of minimum 3.15mm thickness, duly powder coated with minimum 80 micron thickness, verminproof , dust proof (IP54) with front and back openable double door having interlocking arrangement, mounted on MS channel base frame 50X50X6mm not less than 100mm high and grouting legs of panel in PCC 1:4:8 foundation complete. All wiring shall be PVC insulated, copper conductor,properly ferruled and supported. Panel shall be complete with internal copper busbars, supports, earthing terminals, foundation bolts antivibration pads all accessories and ready for operatioin as per OEM recommondations and IS standards.Panel shall be include but not limited to following:

(a)Incomers :- (i) Busbar TPN copper busbars of minimum320A capacity (ii) Changeover switch 320Amps, 415V, 4 pole (on load)= 02 Nos (iii) MCCB 200Amps, 415Volts, 16kA, 4 pole, thermal magnetic release -01 No (Extended rotary operating handle phase spreader links and phase barriers) (b) Outgoings: (i) MCB 63Amps, 10kA, TPN with ammeter -02Nos for diesel pump (ii) DOL starter for Diesel pump -02 Nos (iii) MCB 32Amp, 10kA,TPN with ammeter -02 Nos (iv) Star delta starter for circulation pump -04 Nos (v) MCB SPN 16A,10kA, -02 Nos (vi) Digital volt and ammeter - 1 set (vii) RYB indicator -01 set (viii) Anti-condensation Heater with thermostat-01set. Note :(i)Derating of MCCB and busbars as per IEC for high altitude. (ii) Anti-condensation heater and thermostat for humidity and low temperature protection. (iii) All terminals and joints shall be suitably insulated to avoid condensation- related faults.

Overall Total amount of Schedule 'A' PART-VI (External ELECTRIFICATION)