Addition Alteration to Khetrapal Auditorium at IMA Dehradun

Amount

Designing, supply, installing, commissioning & testing Micro processor controlled Central Air Conditioning twin Screw Horizontal Type Water Chilling Machine with VFD (AHRI /EUROVENT certified) having minimum capacity of 250 TR (2x125 TR) screw type Chilling System for Khetrapal Auditorieum IMA having size as attached in layout plan, to maintain inside desire design condition of temperature 24ºC ± 2ºC through out the year and humidity 55 ± 5% and suitable dust filtration up to 5 micron 97% Efficiency filter at suction and using R134a environment friendly CFC/HCFC free refrigerant, with the following accessories :- Note:- (i) The design and layout of AC plant should be vetted by NIT/IIT/OEM as per layout plan of auditorium before commencement of work and same to be approved by CWE Dehradun. (ii) Password/ credentials for operation of chillers to be submitted prior to Phase-I completion. (iii) The plant will be operated by experienced and well qualified operator from completion of phase I test till completion of defect liability oeriod.

(a) Chiller machine with VFD :- Twin Screw Horizontal Type Water Chilling Machine with VFD having minimum capacity of 125 TR each complete with TEFC squirrel cage induction motor suitable for 415 +10% volts ,3 phase, 50Hz AC with automatic starter, micro processor based panel (compatible with built in resident communication card to interface Chiller, water cooled condenser, Economiser, controls(including pressure differential switch to control water flow, Electronic Expansion Valve etc.),instruments, suction line and chiller insulation, vibration isolators, charge of refrigerant and compressor oil and complete with automatic capacity control system, safety switches, speed increasing gears, forced feed lubrication system etc. Each of the Chiling Machine having minimum 125 TR capacity , Power Cosumption Maximum IKW/Ton at full load: 0.65 KW/TR *** Chiller described above. The Chiller manufacturing is Shell and Tube Water Cooled Condenser of M.S. Shell and integrally finned Copper Tubes, min. 2 pass heat exchanger having maximum pressure drop ≤ 3 m. and Condensor Shell and Tube Flooded type Chiller consisting of MS Shell and Copper Tubes, 2 pass Heat Exchanger, duly insulated at factory. Evaporator shall have refrigerant sight glass or automatic refrigerent leak detection and alarm system, complete as per specifications and as required. The maximum pressure drop across the heat exchanger shall be ≤ 3 m. Qty-- 02 Nos.

The Chiller shall meet the following technical parameters :- (i) Chilled water inlet temperature - 13.5 0 C (ii) Chilled water outlet temperature - 6.7 0 C (iii) Cooling Water inlet temp - 32 0 C (iv) Cooling Water inlet temp - 37.50 C (v) Chiller fouling factor - 0.000048 m2 0C/W (v) Condenser fouling factor - 0.000048 m2 0C/W (vi) Minimum COP - 4.5 (vii) Minimum IPL - 9.5 (viii) Refrigerant - HFC (ix) Max Pressure Drop - 4m (max)

(b) Chilled Water Pump with VFD : Secondary chilled water End suction back pull out chilled water pumps complete with base frame, cast iron casing close coupled with SPDP squirrel cage induction drive motor,Impeller shall be bronze statically and dynamically balanced .shaft shall be as per manufacturer's recommended specification with machanical seal. The pump shall be suitable to match the delivery/ discharge and head required for above chiller of capacity not less than to meet the requirement of water flow rate not less than 375 USGPM at Head of 30 M WG. Qty-- 02 Nos. (c ) Chilled Water Pump with VFD : Primary chilled water End suction back pull out chilled water pumps complete with base frame, cast iron casing close coupled with SPDP squirrel cage induction drive motor,Impeller shall be bronze statically and dynamically balanced .shaft shall be as per manufacturer's recommended specification with mechanical seal. The pump shall be suitable to match the delivery/ discharge and head required for above chillerof capacity not less than to meet the requirement of water flow rate not less than 375 USGPM at Head of 15 M WG. Qty-- 02 Nos.

(d) Open Expansion Water Tank of minimum capacity 500 Litre for Chilled Water Open Expansion Tank along with 32 mm Elastomeric Nitrile rubber foam insulation with adhesive wrapped with Aluminum foil Cladding all around the tank suitable for the chilled water system of above capacity chilling system.- Qty-- 02 Nos. (e) Condenser water circulation pumps End suction back pull out chilled water pumps complete with base frame, cast iron casing close coupled with squirrel cage induction motor,Impeller shall be bronze statically and dynamically balanced .shaft shall be as per manufacturer's recommended specification with mechanical seal.The motor shall be TEFC squirel cage suitable for 415 +/- 10 % volts.The minimum capacity of pump shall be suitable to match the delivery/ discharge and head not less than 550 USGPM at total head 15 MWC required for above chiller plant . Qty-- 02 Nos. (f) Cooling Tower CTI certified Supply of Induced draft counter flow rectangular type FRP Cooling tower suitable including foundation/platform of PCC/RCC as recommended by OEM. MS fabrication work to be provided over the cooling tower to avoid the wood pieces/leaves from the surrounding trees complete with direct drive TEFC induction motor, fan, makeup, Min storage capacity of water tank shall be 5000 Ltr to run smooth functioning of AC Plant of capacity 250 TR, quickfill and drain, float valve, Ladder, fill, drift eliminator and bird protector. The tower shalll have FRP basin. Anti water spillage louvers shall be provided at air intake sections of the tower. CT suitable for 2 X125 TR =250 TR AC Plant but not less than 300 TR capacity or higher as per the design. Following Parameters as per designed and Approved Conditions : Water flow rate not less than 1040 USGPM , Condenser water in & out 32 deg C & 36 deg C respectively Wet bulb Temp. 28.3 deg. Qty - 01 Nos

(g ) AIR HANDLER UNIT (i) Design, Supply, Installation, Testing, Commissioning and Validation of Double skin AHU in thermal break profile with internal coving constructed on 40±2 mm thick CFC free PUF injected (minimum Density: 40±2 kg/Cu. m.) Al profile minimum 0.6 mm thick with duly sandwitched panel. Every section shall have service window (Openable) and LED light for proper illumination. Every door shall be controlled with emergency as safety. (ii) Mixing Chamber : Complete with Gl extruded gear operated volume control damper for fresh air and return air with 20 micron both suitable for manual. (iii) Prefilter : 50 mm thick prefilter of efficiency 95 % down to 10 micron (EU- 4) duly epoxy sealed , made out in Al construction box type . (iv) Fan Section : Fan section complete with arrangement of fixing of fan and motor drive unit. (v) Motor : motor of 2/4 Pole and top terminal assembly of suitable capacity. Drive Set : pulley for fan and motor both V- Belts shall be used in drive set. Protection mesh shall be also supplied for this area wherever required. (vi) Mounting Arrangement : Al extruded section shall be provided below fan and motor . Prefabricated sliding rail arrangement shall be provided below motor for proper allignment. Spring mounted rubber pads shall be provided below this section to avoid any vibration. Flexible connection at out let of fan to discharge section made out with fire retardant canvas cloth. (vii) Cooling Coil : 6 No of CHW coil fabricated in copper tubes of thickness min 0.45mm with 11 - 13 FPI Al finnes in Shine waves design. SS Drain Tray : SS drain tray duly insulated with 10 mm thick closed cell nitrile rubber insulation

(viii) Header : Coil header shall be of suitable size MS pipe along with air purging arrangement. (ix) Micro vee Filter : Micro vee filter of efficiency 95% down to 5 micron capacity Filter frame shall be in Al anodised sheet construction . (x) Supply Air Damper : Air discharge section complete with Gl extruded volume control damper at the out let of AHU suitable for manual operation. (xi) The AHU should include suitable Variable Frequency Drive (VFD) along with outer box (powder coated) and wall or floor mounting stand (MS painted) HVAC series Motor - suitable but minimum 15 KW. The AHU of following discharge capacity and design as per specification mentioned in 1.7 (i) to (xi) :- (1) AHU 40000 CFM @ S.P. 90 MMWC SUITABLE COOLING CAPACITY - 02 Nos (2) AHU 5000 CFM @S.P 65 MMWC SUITABLE COOLING CAPACITY-04 Nos Note for AHU item No. g (1) & (2) : The item comprises of fixing of AHU at desired position by whatever means i.e, PCC work , MS work (fabrication , welding, brazing , soldering etc ) is deemed to be included in this item. Also the Contractor will repair and matchup the surface disturbed during fixing of equipments.

Condenser Water Valves & Accessories Supply and fixing Butterfly Valve complete with necessary fitting like flanges, gasket and hardware like nut, bolts and washer (PN-10) of the size 150 mm dia complete all as specified and directred.

Supply and fixing Butterfly Valve complete with necessary fitting like flanges, gasket and hardware like nut, bolts and washer (PN-10) of the size 125 mm dia complete all as specified and directred.

Supply and fixing Butterfly Valve complete with necessary fitting like flanges, gasket and hardware like nut, bolts and washer (PN-10) of the size 40 mm dia complete all as specified and directred.

Supply and fixing Balancing Valve complete with necessary fitting like flanges, gasket and hardware like nut, bolts and washers (PN-10) 150 mm dia complete all as specified and directred.

Supply and fixing Balancing Valve complete with necessary fitting like flanges, gasket and hardware like nut, bolts and washers (PN-10) 125 mm dia complete all as specified and directred.

Supply and fixing Balancing Valve complete with necessary fitting like flanges, gasket and hardware like nut, bolts and washers (PN-10) 40 mm dia complete all as specified and directred.

Supply and fixing Non Return Valve complete with necessary fitting like flanges, gasket and hardware like nut, bolts and washer (PN-10) of the size 150 mm dia complete all as specified and directred.

Supply and fixing Non Return Valve complete with necessary fitting like flanges, gasket and hardware like nut, bolts and washer (PN-10) of the size 125 mm dia complete all as specified and directred.

Supply and fixing Pot strainers / Y Strainers in position of the size (PN-10) 200 mm dia complete all as specified and directred.

Supply and fixing Pot strainers / Y Strainers in position of the size (PN-10) 150 mm dia complete all as specified and directred.

Supply and fixing Pot strainers / Y Strainers in position of the size (PN-10) 125 mm dia complete all as specified and directred.

Supply and fixing Pot strainers / Y Strainers in position of the size (PN-10) 40 mm dia complete all as specified and directred.

Supply and fixing industrial type pressure gauges of 100 mm dia with Gun metal valves for isolation and necessary fittings, for the ease of maintenance and operation complete all as specified and directred.

Supply and fixing Temperature Gauges industrial type temperature gauges of 100 mm dia with thermo well and necessary fittings, for the ease of maintenance and operation complete all as specified and directred.

Supply and fixing Auto Airvent automatic type of the sizes 15 mm dia complete all as specified and directred.

Supply and fixing of MS class 'C' pipes confirming to IS 1239 for pipe of following size dia complete with all necessary fittings such as bends, tees, reducers, flanges etc. and supports such as clamps, anti-vibration hangers etc. complete as per specifications & drawings. Note: All pipings shall be insulated with 25 mm thick Elastomeric Nitrile Rubber foam Insulation with adhesive all around and then it should be wrapped with Aluminium foil Cladding for whole length complete all as specified and directred.

200 mm dia MS Pipe

150 mm dia MS Pipes

125 mm dia MS Pipes

100 mm dia MS Pipes

65 mm dia MS Pipes

Material and labour for fabrication , welding, soldering, brazing , Painting one coat of enamel paint and painting with two coat of weather proof paint over MS structural works for supports / caging /casing of cooling tower area with MS Angles , MS channels, wire mesh net , MS strips as required at site complete all as specified and directred.

Fresh Air/Exhaust Air Louvers Supply, Installation, Testing and Commissioning of extruded aluminium louvres with frame bird screeen 60 mm X 60 mm pre-filter and microfilter of 10 microns with frame, mounting arrangement etc all as specified.

CHW MANIFOLD Supply, Installation, Testing and Commissioning of Chilled water Manifold with piping of M.S. Class 'C' pipe( Consider 6 RMT pipe length) complete with fittings like elbows, tees, reducers,Flanges Gasket, Nut-Bolts etc,Valves (5no Butterfly Valve for 50mm Dia & Above / 5no ball Valve below 50mm Dia) , Y type Strainer 1 no each manifold, 2 way PIBC value, 2 No. Pressure Gauges with isolation ball valve, 2 no PG type analog with Dial Size 100mm of range 0 to 10 Kg/cm², Temperature Gauges with 100 mm dial size with Thermowell etc as required of range -10 ˚C to 50˚C, Automatic Air Purge Valve 1 no, 20mm Dia Drain Valve, Cold insulated with site Glued, closed cell fire rated (FM Approved) Nitrile Rubber insulation of suitable density (40-60kg/m3), Class O insulation of 25mm Thick, Covered with GC cloth.Modulating shall be compatable with actuator operating voltage 24V AC & feed back signal output. O.1 AHU 01 :100 mm

CHW MANIFOLD Supply, Installation, Testing and Commissioning of Chilled water Manifold with piping of M.S. Class 'C' pipe( Consider 6 RMT pipe length) complete with fittings like elbows, tees, reducers,Flanges Gasket, Nut-Bolts etc,Valves (5no Butterfly Valve for 50mm Dia & Above / 5no ball Valve below 50mm Dia) , Y type Strainer 1 no each manifold, 3-way Motorized Modulating valve, 2 No. Pressure Gauges with isolation ball valve, 2 no PG type analog with Dial Size 100mm of range 0 to 10 Kg/cm², Temperature Gauges with 100 mm dial size with Thermowell etc as required of range -10 ˚C to 50˚C, Automatic Air Purge Valve 1 no, 20mm Dia Drain Valve, Cold insulated with site Glued, closed cell fire rated (FM Approved) Nitrile Rubber insulation of suitable density (40-60kg/m3), Class O insulation of 25mm Thick, Covered with GC cloth.Modulating shall be compatable with actuator operating voltage 24V AC & feed back signal output. O.1 AHU 01 :50 mm

MOTORIZED FIRE AND SMOKE DAMPERS Supply, Installation, Testing and commissioning of motorized combination fire and smoke damper (spring return type) of approved make of atleast 120 minute fire rating and all as specified. The fire damper shall be complete with electronic temperature sensor and electrically operated actuator .The fire dampers shall be located in the supply/return air ducts, at all fire rated crossovers (shafts/walls etc.) The control panel will be such located that the reset can be easily done These combination smoke and fire dampers shall be interlocked with the building management system for fire detection / HVAC and shall trip/close in the event of fire / smoke in the respective zone with the Bare Fire Dampers with 400 mm sleeve. The fire damper should include Compatible and suitable Fusible link, Limit Switch and Actuator.

Supply and fixing of electrical GI sheathed tube electric heaters of 3.0 KW complete with thyrister control for temperature or humidity control; activated by single / multi step thermostat / humidistat as required.The electric heaters enclosure should be complete in all respect with electric terminal boxes ( isolated from air path ), heaters, Insulated access hatches etc, electrical cabling with glass sleeve and with earthing, suitable for installation in AHU.all the other accessories for functioning of heater should be included in the cost.

Supply and fixing of electrical GI sheathed tube electric heaters of 5.0 KW complete with thyrister control for temperature or humidity control; activated by single / multi step thermostat / humidistat as required.The electric heaters enclosure should be complete in all respect with electric terminal boxes ( isolated from air path ), heaters, Insulated access hatches etc, electrical cabling with glass sleeve and with earthing, suitable for installation in AHU.all the other accessories for functioning of heater should be included in the cost.

Supply, laying and testing cable XLPE Insulated ,screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of following sizes alongwith with end termination joint /Chiller,Cooling tower

6 sq mm 4 Core Al XLPE

10 sq mm 4 Core Al XLPE

16 sq mm 4 core Al XLPE

25 sq mm 4 core Al XLPE

70 sq mm 3.5 core Al XLPE

240 sq mm 3.5 Core Al XLPE

Supply and fixing of hot dip Galvanised CABLOFIL (300 MM width) wire mesh cable trays, manufactured with a longitudinal 'T- welded' safety edge.Trays shall be constructed with 50 X 100 mm mesh configuration. All Accessories including couplers (CE25 + CE30 + BTRCC screw-based combination system or EDRN fast coupling) and mounting accessories are required of same finish as per site requirement..The deflection of cable tray must be no more than 1/200th of the distance between two supports and tested in accordance with the standard IEC 61537. Wire mesh cable trays must be designed with an optimum span of 1.5 m, taking into account the maximum carrying capacity authorised by the manufacturer. Assemblies with specific fire resistant properties must have an E30-E90 certificate. Supports, brackets or hangers designed, mechanically tested and supplied by the wire cable tray manufacturer to be used and all as specified and directed.

Dismantling of old unsv existing Central Air conditioning plant comprising AHU, Cooling Towers Chillers,condenser pumps, ducts , grills and related items and deposited to E/M store yard of GE IMA.

Supply, installing, commissioning and testing LT MAIN panel board (CPRI approved) for AC plant (indoor type) cubical type made out of CRCA sheet 2mm thick dust and vermin proof and angle iron of size 50 x 50 x 6mm, pedestal frame grouted in PCC (1:2:4) type B-1, 20mm graded stone aggregated thimble and cable entry boxes with cable glands. Panel should covered from all sides with front and back lockable door and hinges complete with Copper bus bar of capacity 1200 Amps, TPN,including Internal Power & control wiring with PVC insulated copper wire all as required.(In separate chamber) including painting with two coats synthetic enameled paint over a coat of red oxide primer and consisting of the following :-

Supply, installing, commissioning and testing LT panel board (CPRI approved) for AHU (indoor type) cubical type made out of CRCA sheet 2mm thick dust and vermin proof and angle iron of size 50 x 50 x 6mm, pedestal frame grouted in PCC (1:2:4) type B-1, 20mm graded stone aggregated thimble and cable entry boxes with cable glands. Panel should covered from all sides with front and back lockable door and hinges complete with Copper bush bar of capacity 300 Amps, TPN, rate chamber, including Internal Power & controle wiring with PVC insulated copper wirepe all as required , including painting with two coats synthetic enameled paint over a coat of red oxide primer and consisting of the following :-

Note for item No. LT Panels : (i) Interlock wiring of complete AC plant so that it can trip whenever there is any fault as per standard safety norms. (ii) CHW flow control actuated valve and Heater to be worked based on required Temperature and Rh set point, (ii) Heater should not be started unless and until desired temperature not achieved in side the room (iii) Motor should not start if AHU door is open (iv) Call light on and Motor stop if AHU door is open (v) Heater should start only if AHU motor is in running condition (vi) AHU motor must be stopped if AHU door is open, fire damper link Brocken, Incomer Power supply control switch/MCCB (vii) Indicator for RYB Power Supply, Indicator for heater bank on/off, Indicator for motor tripping, ON/Off Push Buttons with In-built LED lamps be provided. (viii) Heater Bank power Supply & Interlocking with Blower, CHW PIBCV actuator unit Power Supply & Interlocking etc as per safety norms and standard sequence.. (ix) Interlocking like - Marine Lamp, Limit switches etc as required AUTO / MANUAL control and Status

Material and labour for earthing with galvanised steel earth plate electrode 60cmX60cmX 6mm thick burried directly in ground (earth pit not less than 2.25 mtr below ground level) with top edge of the plate not less than 1.5 mtr below ground level connected to 4mm thick GI wire by means of nuts,bolts,check nuts & washers of galvanized iron or steel,protected by 15mm bore light grade galvanised iron pipe and connected to main switch board,including all necessary excavation & earth work in hard dense soill including funnel with wire mesh and watering pipe 20 mm bore medium grade galvanised iron pipe with charcoal and common salt in alternate layers of 15 cm thickness all around the GI plate electrode with concrete pit in PCC 1:3:6 type C-1 with cast iron frame including cast iron cover10mm thick hinged to CI frame and 6mm MS rod for handle and necessary testing complete all as shown in electrical plate No 3 of SSR part-I all as specified and directed.(Earthing for pumps )

Supply and fix galvanised iron wire 4 mm on porcelain saddle on wall/ Floor/ Roofs /buried in ground including taking down old unsv strip of any all as directed.

Material and labour for earthing with galvanised steel earth plate electrode 60cmX60cmX 6mm thick burried directly in ground (earth pit not less than 2.25 mtr below ground level) with top edge of the plate not less than 1.5 mtr below ground level connected to 32 X 6 mm thick GI strip by means of nuts,bolts,check nuts & washers of galvanized iron or steel,protected by 15mm bore light grade galvanised iron pipe and connected to main switch board,including all necessary excavation & earth work in hard dense soill including funnel with wire mesh and watering pipe 20 mm bore medium grade galvanised iron pipe with charcoal and common salt in alternate layers of 15 cm thickness all around the GI plate electrode with concrete pit in PCC 1:3:6 type C-1 with cast iron frame including cast iron cover10mm thick hinged to CI frame and 6mm MS rod for handle and necessary testing complete all as shown in electrical plate No 3 of SSR part-I all as specified and directed.(Earthing for panels )

Supply and fix galvanised iron strip 32mm X6mm on porcelain saddle on wall/ Floor/ Roofs /buried in ground including taking down old unsv strip of any all as directed.

Supply, fabrication, installation and testing sheet metal ducts exposed round or rectangular in accordance with approved shop drawing. All supports and Flange joints to be painted. All ducts to be joined with MS fabricated Flange, fixing with GI nut bolt and 3X25 MM neoprene rubber gasket to be used for flange joint, duct final joint fixing with non acidic grad silicone, Main duct leak test by soap solution, pressure test on 150 MM WC, GI threaded rod and painted MS angle to be used for duct support, Duct measurement will be at actual duct surface area, insulation measurement will be at actual surface area after insulation, all insulation joint overlap by matching colour one side adhesive PP tap and Aluminul Cladding Note : All duct banding to be done by Machine only, Required fabrication support or provision for duct hanging or mounting is in contractor scope, proper silicon to be applied for all joints sealing Up to 400 MM Duct size 25 X 25 X 3 MM MS angle to be used for duct flange Above 400 to 750 duct size 40 X 40 X 3 MM MS angle to be used for duct flange Above 750 to 1000 duct size 40 X 40 X 5 MM MS angel to be used fir duct flange Above 1000 MM duct size 50 X 50X 5 MM MS angle to be used for duct flange of 18 Gauge

Testing of complete existing Airconditioning Duct (Pressure ) whose surface area is approx 550 Sq m and cleaning and repairing of duct wherever required.

Supply and installation of (Accoustic) Duct liner (Insulation) of 19 mm thickness of Elastromeric Rubber Insulation manafactured as per ASTM E 84 test & which should also meet NFPA 90A supplementary materials for air distribution system which should not absorbs less 0.2% water by volume (ASTM c 209), should not support microbial growth (ASTM C1071, G21, G22) and should emit objectionable odors (ASTM C 665) and should have thermal conductivity of 0.27 ( R - 2.78 in 3.4" thickness) and water vapor permeance of 0.10. - Class "1"

Fiberglass Wool Insulation Max Temperature Resistance 0-200 degree Celsius, Moisture Rate Less than 2%, Water Content Less than 2%, Density 12 Kg/M3 - 48 Kg/M3,Thermal Conductivity 0.030 - 0.041 at 25 degree Celsius. 25 mm thick including Aluminium perforated net.

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