NISER/MECH/AC/AH/2023-24/09_1

Supply, installation, testing and commissioning of microprocessor based Energy Efficient air cooled Screw compressor Chiller unit (Model as per OEM), Actual Capacity: : 150. TR having efficient Semi Hermetic VFD Screw compressors. Chilling machine described above and complete in all respects as follows for the operating parameters as given under. Cooling Capacity : 150 TR Chilled Water In Temperature : 11 Deg C Chilled Water Out Temperature : 6 Deg. C Chiller Fouling Factor : 0.0001 or better Design Ambient Air Temperature : 42 Deg. C Voltage - Phase - Frequency (V-X-Hz) : 400V+/- 10% - 3Ph - 50Hz +/- 3% Control Voltage (Volts) : 210-240 V Minimum % capacity reduction : 25% BMS Link : With MODBUS or BACNET Protocol Start Mode : VFD Unit Starting Current as rated by OEM : 50, Max. allowable operating current (Amps) at 400V, per Compressor : as rated by OEM , Unit Operating Current : as rated by OEM Power Consumption Of Chiller / TR At Tender Condition Mentioned Above - ≤1.48 (including condenser Fan Power), COP At AHRI Condition - ≥3.0 (Including Condenser Fan Power), EER (Btu/W-h) :8.26 The scope shall include 19 mm thick polyvinyl nitrile rubber insulation duly cladded between aluminium sheets of 0.5 mm thickness and properly clamped to pump & Anti-vibration pads over RCC / cement floor complete etc as required.(Minimum 25HP) Frame work for mounting the above condenser, fans, chiller compressor and motor with base plate complete with anti-vibration pads/springs complete etc as required. Initial / first charge of refrigerant gas, lubricating oil and compressor oil etc as required. Water flow switches at outlet of chiller, water drain, air purge valves, thermometers and pressure gauges etc. as required. Make-Voltas / Kirloskar/blue star/Daikin/Mitsubis/hitachi/LG

Supplying, fixing, testing and commissioning of following valves, strainers, gauges in the chilled water plumbing line, pre-insulated to the same specifications as the connected piping and adequately supported as per specifications etc complete as required.(Suitable for PN 1.6). Make: CR Valves/ Audco/ Advance/ Leader/ Inter valve/ Kirloskar BALANCING VALVE WITH BUILT IN MEASURING FACILITY of 150 mm

Supplying, fixing, testing and commissioning of following valves, strainers, gauges in the chilled water plumbing duly insulated to the same specifications as the connected piping and adequately supported as per specifications. BUTTERFLY VALVE (MANUAL) with C I body SS Disc, Nitrile Rubber Seal & ORing PN 16 pressure rating for chilled water/hot eater circulation as specified C.I. Butterfly valve 150mm

Y - STRAINER of Ductile CI Body flanged ends with stainless steel strainer for chilled / hot water circulation including insulation as specified. Y strainer 150 mm

NON - RETURN VALVE with duel plate of C I body SS plates vulcanized NBR seal flanged end & PN 16 pressure rating for chilled / hot water circulation including insulation as specified. non return valve 150 mm

Providing and fixing in position the industrial type pressure gauges with gun metal / brass valves complete as required , pressure gauge

Providing & fixing in position the mercury in glass industrial type thermometers,Thermometer

Supplying, laying/ fixing, testing and commissioning of following nominal sizes of chilled water piping plumbing inside the building (with necessary clamps, vibration isolators and fittings but excluding valves, strainers, gauges etc.) duly insulated with fire retardant quality expanded polystrene moulded pipe section of density 20 kg/cu.m after a thick coat of cold setting adhesive (CPRX compound) wrapping with 500g polythene faced hessain and finally applying 0.63mm aluminium sheet cladding complete with type3 , grade 1 roofing feltstrip(as per IS:1322 as amended up to date) at joints repairing of damage to building etc. as per specifications and as required complete in all respect. Note:- The Pipes of sizes 150mm & below shall be M.S. ‘C’ class as per IS : 1239 and pipes size above 150mm shall be welded black steel pipe heavy class as per IS: 3589, from minimum 6.35mm thick M.S. Sheet for pipes upto 350 mm dia. and from minimum 7mm thick MS sheet for pipes of 400 mm dia and above. Chilled water piping of nominal size - 150mm dia. (50mm thick expanded polysterene) MS pipe work 150 mm dia

providing, laying/ fixing, testing and commissioning of C class heavy duty cnforming is IS 1239/3598 i/c fitting like elbow,flange,tees, taper, nut,bolt,gasket etc including welding,providing cement concrete block,as support,anticorosive treatment,etc. Pipe accessories 150 dia

Supplying, laying/ fixing, testing and commissioning of following nominal sizes of chilled water piping inside the building (with necessary clamps, vibration isolators and fittings but excluding valves, strainers, gauges etc.) duly insulated with following closed cell elastometric nitrile rubber of minimum 45 Kg / cu m density, thermal conductivity 0.037 W/MK or better at 20 deg mean temperature class ‘O’ insulation applied by suitable rubber based adhesive complete including repairing of damage to building etc. as per specifications and as required complete in all respect. Note:-The Pipes of sizes 150mm & below shall be M.S. ‘C’ class as per IS : 1239 and pipes size above 150mm shall be welded black steel pipe heavy class as per IS: 3589, from minimum 6.35mm thick M.S. Sheet for pipes upto 350 mm dia. and from minimum 7mm thick MS sheet for pipes of 400 mm dia and above.Chilled water piping of nominal size - 80mm dia. (32mm thick nitrile rubber insulation) MS pipe 80mm dia

providing, laying/ fixing, testing and commissioning of C class heavy duty cnforming is IS 1239/3598 i/c fitting like elbow,flange,tees, taper, nut,bolt,gasket etc including welding,providing cement concrete block,as support,anticorosive treatment,etcpipe accessories 80mm dia

Supplying, fixing, testing and commissioning of following valves, gauges and strainers for condenser water circulation as per specifications. BUTTERFLY VALVE (MANUAL) with C I body SS disc nitrile sheet & O - ring & PN 16 pressure rating as specified.BUTTERFLY VALVE (MANUAL) 80 mm, butterfly valve 80 mm dia

Supplying, fixing, testing and commissioning of following sizes Motorized Butter fly Valves with CI Body, SS Disc,O - ring and minimum PN-16 pressure rating , conforming to BS 5155, IS 13095, with IP-55 actuator, capable of accepting upto 10V DC and upto 20mA electric signal and providing similar transduced feedback output to control system as required.Three way motorized valve 80mm

Automatic air vent valve 32 mm

Supply, installation, testing and commissioning of Motorized (ON-OFF Type) duct mounted GI volume control damper with enthalpy sensor and necessary control wire (minimum 1.5 sqmm) for integration within AHU room Motorized On off type duct mounted GI volume controle damper

Supply, installation, balancing and commissioning of fabricated at site GSS sheet metal rectangular/round ducting complete with neoprene rubber gaskets, elbows, splitter dampers, vanes, hangers, supports etc. as per approved drawings and specifications of following sheet thickness complete as required.with Supplying and fixing of following thickness duly laminated aluminum foil of mat finish closed cell Nitrile rubber (Class “O”)19 mm insulation on existing duct after applying suitable adhesive for Nitrile rubber. The joints shall be sealed with 50 mm wide and 3 mm thick self adhesive nitrile rubber tape insulation complete as per specifications and as required. Site fabricated GSS sheet metal rectangular ducting as per IS 655-2006 for 0.8. mm thick

Chilled water AHU with >42mm PUF panel and double skin construction complete with thermal break and BACKWARD CURVED AEROFOIL BLADES, PLUG TYPE centrifugal fan mounted on the GI base frame along with motor, with vibration isolation pads. The AHU shall have two stage filtration with G4 prefilters in prefilter section and F8 finefilters in finefilter section, 10 Row deep chilled water cooling coil section with cooling coil and with min. 2/3 row deep Wrap around coil , blower section with blower, heater section for 4 stages with heaters connected in star connection, outlet mouth connection with damper for air balancing. The blower shall be of a static pressure 125mm WC , AHUs shall have provisions for connecting the pressure sensors, temperature sensors etc as per the requirement. The AHU can be in “double decker” arrangement to fit within the available space. All the motors supplied shall be VFD compatible. Including the variable frequency drives(VFD) with Harmonic suppressants/ filters such that THD do not exceed 3% for following Air Handling Units.Variable frequency drives shall be provided with necessary controllers complete with control wiring in all respects as required and as per specifications ans as per required for the AHU. Along with Double tube finned air heater in supply air section of capacities as mentioned below in tabular form along with rating of AHUs ( equally distributed over the 3 phases). The scope shall include: 1. Heating thermostat (TH) for temperature control 2. Air flow switch for switching off heaters in case of no air flow, 3. Humidistats (HU) for humidity control, Complete with interwiring including suitable rated PVC / XLPE insulated copper cable, connection thimbles, AHU mounted Contactor complete with suitable incomming electrical isolator/mcb for strip heaters in weather proof enclosure, clamps, loop earthing etc , terminal electrical distribution board, glass insulated flexible wires for connection of heaters, fire rated fillings at duct crossing etc. as required. All AHU shall be EUROVENT certified.Blower shall be of 4500cfm and the AHU to deliver 45TR. UVGI lamps - UVC emitter ( Each AHU will have combination of 2 feet long UVC lamps, each lamp shall cover effectively 4sqft of area ) in coil section of AHU. The scope shall include electrical wiring connection with suitable size XLPE/PVC insulated copper conductor multicore cable and electrical isolator/switch for suitable capacities. The purpose of these UVC emitters is to improve indoor air quality (IAQ) by eliminating mould, bacteria and other contaminants in downstream section etc complete as required. Note: AHU Make: VTS/Citizen/Flact woods VFD Make – ABB / DANFOSS / ALLEN BREDLY

VAV box with controller for bms conroling and mounting that should be compatibility with existing system (Supply, Installation, Testing and Commissioning of VAV box with controller for variable volume supply or extract systems. Consists of casing with damper blade which when closed complies with the air leakage requirements of DIN 1946, Part 4, includes integral averaging differential pressure grid and factory pre-wired control components. Site measurement and adjustment of factory-set minimum and maximum volume flow rates can be made. Casing air flow leakage according to Class II, VDI 3803 or DIN 24194. Pressure difference range 20 to 1500 Pa, volume flow range, depending on controls used, up to 10:1. The VAV should be compatable for BMS controlling and monitoring.) existing BMS system is Make -SIEMENS

Insulated expanson tank 1000 ltr capacity at site Supplying and fixing of following thickness duly laminated aluminum foil of mat finish closed cell Nitrile rubber (Class “O”)19 mm insulation on existing duct after applying suitable adhesive for Nitrile rubber. The joints shall be sealed with 50 mm wide and 3 mm thick self adhesive nitrile rubber tape insulation complete as perspecifications and as required.

BMS compatibility with existing system with data cable for BMS connection 150 mtr .

Supplying and making straight through joint with heat shrinkable kit including ferrules and other jointing materials for following size of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 KV grade as required 3.5X 150 sqmm aluminium cable

3X6 sqmm copper ISI marked, FRLS PVC insulated

Control cable 2 C X 1.5 sqmm ISI marked, FRLS PVC insulated

Control cable 4 C X 2 sqmm ISI marked, FRLS PVC insulated

Dismantling existing pipe and instalation of new M/S pipe Nominal size 200 mm dia including all support (Supplying, laying/ fixing, testing and commissioning of following nominal sizes of chilled water piping inside the building (with necessary clamps, vibration isolators and fittings but excluding valves, strainers, gauges etc.) duly insulated with 80 kg/ cum density resin bonded fiber glass or 144 Kg / cum density mineral wool insulation (non combustible) pipe section insulation covered with a layer of 120 gm/sqm polythene sheet (vapour barrier) and finally applying 0.63mm aluminium sheet cladding complete with type3 , grade 1 roofing feltstrip(as per IS:1322 as amended up to date ) at joints and repairing of damage to building etc. as per specifications and as required. Note:The Pipes of sizes 150mm & below shall be M.S. ‘C’ class as per IS : 1239 and pipes size above 150mm shall be welded black steel pipe heavy class as per IS: 3589, from minimum 6.35mm thick M.S. Sheet for pipes upto 350 mm dia. and from minimum 7mm thick MS sheet for pipes of 400 mm dia and above . )

Dismantling of existing pipe and instalation of new M/S pipe Nominal size 100 mm dia including all support ( Supplying, laying/ fixing, testing and commissioning of following nominal sizes of chilled water piping inside the building (with necessary clamps, vibration isolators and fittings but excluding valves, strainers, gauges etc.) duly insulated with 80 kg/ cum density resin bonded fiber glass or 144 Kg / cum density mineral wool insulation (non combustible) pipe section insulation covered with a layer of 120 gm/sqm polythene sheet (vapour barrier) and finally applying 0.63mm aluminium sheet cladding complete with type3 , grade 1 roofing feltstrip(as per IS:1322 as amended up to date ) at joints and repairing of damage to building etc. as per specifications and as required. Note:The Pipes of sizes 150mm & below shall be M.S. ‘C’ class as per IS : 1239 and pipes size above 150mm shall be welded black steel pipe heavy class as per IS: 3589, from minimum 6.35mm thick M.S. Sheet for pipes upto 350 mm dia. and from minimum 7mm thick MS sheet for pipes of 400 mm dia and above )

Dismantling of existing pipe and instalation of new M/S pipe Nominal size 80 mm dia including all support Supplying, laying/ fixing, testing and commissioning of following nominal sizes of chilled water piping inside the building (with necessary clamps, vibration isolators and fittings but excluding valves, strainers, gauges etc.) duly insulated with 80 kg/ cum density resin bonded fiber glass or 144 Kg / cum density mineral wool insulation (non combustible) pipe section insulation covered with a layer of 120 gm/sqm polythene sheet (vapour barrier) and finally applying 0.63mm aluminium sheet cladding complete with type3 , grade 1 roofing feltstrip(as per IS:1322 as amended up to date ) at joints and repairing of damage to building etc. as per specifications and as required. Note:The Pipes of sizes 150mm & below shall be M.S. ‘C’ class as per IS : 1239 and pipes size above 150mm shall be welded black steel pipe heavy class as per IS: 3589, from minimum 6.35mm thick M.S. Sheet for pipes upto 350 mm dia. and from minimum 7mm thick MS sheet for pipes of 400 mm dia and above

Dismantling of existing pipe and instalation of new M/S pipe Nominal size 50 mm dia including all support (Supplying, laying/ fixing, testing and commissioning of following nominal sizes of chilled water piping inside the building (with necessary clamps, vibration isolators and fittings but excluding valves, strainers, gauges etc.) duly insulated with 80 kg/ cum density resin bonded fiber glass or 144 Kg / cum density mineral wool insulation (non combustible) pipe section insulation covered with a layer of 120 gm/sqm polythene sheet (vapour barrier) and finally applying 0.63mm aluminium sheet cladding complete with type3 , grade 1 roofing feltstrip(as per IS:1322 as amended up to date ) at joints and repairing of damage to building etc. as per specifications and as required. Note:The Pipes of sizes 150mm & below shall be M.S. ‘C’ class as per IS : 1239 and pipes size above 150mm shall be welded black steel pipe heavy class as per IS: 3589, from minimum 6.35mm thick M.S. Sheet for pipes upto 350 mm dia. and from minimum 7mm thick MS sheet for pipes of 400 mm dia and above )