Supply, Installation, Testing and Commissioning of 2X21TR Air Cooled Inverter Scroll Type water chilling AC at ATDC-1,EandEC Dept. of IIT Kharagpur

Supply, installation, testing & commissioning of Eurovent / AHRI certified Air-cooled Inverter Scroll Chillers Unit. Each Chillers should be complete with fully Inverter type Scroll compressors, High efficiency DX Shell & Tube Heat exchanger Evaporator, Air-cooled condenser with protective coating , Control panel etc. The Chillers shall be charged with R410a /R32a Refrigerant. Each Chiller / Chillers should have 2 compressor and 2 independent refrigerants circuit. The drive motor suitable for 380 - 415V +/-5%, 3 phase, 50 cycles/sec . The Chillers should be factory insulated as per manufacturers standard. The inverter type heat pump should not have starting current more than Full load current. Micro-processor based controls with colorful touch screen alpha-numeric display in english for all operating parameters such as chilled water inlet, chilled water outlet, operating pressures etc. Flange connection shall be part of the Chiller / Chillers should be able to unload up to 20 % of the total load. Condenser should have energy efficient Electronically Commutated condenser fans. It is recommended that Chillers supplier should be the manufacturer of compressors used in Chiller for ease of sevice till the life of equipments. Cooling capacity at designed conditions indicated below : Capacity : 21 TR [Cooling ] Cooling Water Temperature [Inlet /Outlet] : 12/7 deg F Ambeint Air temperature : 35 deg C [Cooling ] Ambeint Air temperature : 35 deg C [Cooling ] COP of Chillers : 2.6 [Cooling] and IPLV of 5.1 W/W (Including compressor and Fan motor). Water Pressure drop across the Chiller should be less than 20 ft of aqua. Chillers should be equipped with electronic expansion valve for the precise control. The unit was designed with a compact structure and robust assembly. The condenser fan is completed with high-efficiency wing style axial fan and direct driven motor for low sound level. The unit compressor should have factory fitted sound insulation box and noise level should be less than 70 dBA at 1 mtr. Additionally the Chiller unit should have the silent mode / night mode feature to reduce the noise level below 65 dBA at 1 mtr. The Condenser should be of Aluminium Fin and copper tubes. Condenser fin should have factory applied heavy anti-corrosion treatment applied like Blygold or equivalent to industrial equipment in the ocean. This special coating should be able to protect the condenser fins from high salinity, humidity and pollution. Supplier should submit the valid test certificate for qualification of atleast 10000 Hours of salt spray test as per Test method B of ISO 21207 and ASTM B117 / ISO 9227 and same should be endorsed / verified by prestigous global agency like TUV. The Chiller / Chillers unit should have inbult feature for BMS communication with Modbus protocol using RS485 port. Supplier should submit the valid AHRI / Eurovent test certificate for the verification of capacity along with the Chillers model selection from the AHRI / Eurovent certified model selection program. 1working+1standby

Supply, Installation, Testing and Commissioning of Horizontal split casing type Primary chilled water pump set, centrifugal type direct driven , motor suitable for VFD Drive, capable of delivering 55 GPM (approx) of water against a head of 20 Mtr. duly insulated with TF quality Expended Polystrene of not less than 50 mm thick & density not less than 20kg/cu.m duly cladded between 0.5 mm thick aluminium sheet properly clamped to pump in two semicircular sections, comprising of end- suction back pullout type pump with bronze impeller , Squirrel Cage Induction Motor (minimum energy saving label of IE-2 type ) TEFC with Class 'F' insulation , 1440 rpm speed, SS410 Shaft, stainless steel shaft sleeve, suitable for operation on 415 ± 10% volts, 3 phase, 50 Hz A.C. supply, 150 mm dia dial type pressure gauges for inlet & outlet, mounted on common MS base plate, anti vibration pads, cement concrete foundation complete as per specifications etc. as required. The minimum pump efficiency is 70 % & motor rating should minimum 15 % higher than maximum BHP of the pump (1 Working + 1 Standby)

Supply, Installation, Testing and commissioning of factory built floor mounted chilled water double skin type horizontal/vertical air handling units made of 25mm thick panels consisting of pre plasticized G.I. casing of thickness 0.8mm outside layer and 0.8 mm inside layer with polyurethane foam (PUF) insulation factory injected between them by injection moulding machine, complete with blower section with blower suitable for static pressure as required, minimum 2 bend GSS/PVC eliminators, cooling coil section with aluminium finned copper tubes (tubes thickness not less than 0.5mm) cooling coil of 6 row deep, filter section with 50mm thick metal viscous/ washable synthetic type air prefilters, belt drive package with TEFC drive motor of efficiency class IE5 suitable for 415 ± 10% volts, 50Hz, 3 Phase AC supply suitably designed for varialbe frequency drive applications, drain connections, stainless steel (18G) drain pan with PUF insulation, 150 mm dia. dial type pressure gauges (2 nos.)and industrial type thermometers (2 nos.) at the inlet and outlet of coil, auto purge valve wherever required, necessary vibration isolation arrangement etc. complete as per specification and of following capacities. Motor shall be flame proof. Capacity: 21.0 TR; Air Flow: 9200 CFM.

Supplying, laying/ fixing, testing and commissioning of following nominal sizes of chilled water piping plumbing inside/outside 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 24 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. Size-65mm dia

Supply, installation, testing and commissioning of PN16 rated 3 Way valve of following size. 65 mm dia

Providing and fixing in position the water flow switch complete as required.

Supply, installation, testing & commissioning of Y - STRAINER of Ductile CI Body flanged ends with stainless steel strainer for hot / condenser water circulation including insulation as specified Size-65mm dia

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. size-65mm dia

BALANCING VALVE with CI body ,SS Plates vulcanized NBR Seal flanged end and PN 16 Pressure rating as specified size-65 mm dia