NISER/MECH/AC/AH/2023-24/19

Supply, installation, testing and commissioning of microprocessor based Energy Efficient air cooled multi Screw compressor Chiller unit (Model as per OEM), Nominal Capacity: : 125. TR having efficient Semi Hermetic VFD Screw compressors.(minimum two compressor) condenser should be copper tube with aluminum fins (microchannel condenser not accepted ) Chilling machine described above and complete in all respects as follows for the operating parameters as given under. 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 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 or equivalent Preferred Make: Kirloskar/York/Bluestar/Diakin/Voltas or equivalent

Supplying, fixing, testing and commissioning of following valves 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 200 mm

Supplying, fixing, testing and commissioning of following valves, 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 (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

Automatic air vent valve 32 mm

(Supply, Installation, Testing and Commissioning of VAV box with controller for bms conroling and mounting that should be compatibility with existing BMS system which control two existing chiller, new chiller should be compatibility. only for chiller (existing 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 200 mtr .

Supply, Laying of one number PVC insulated and PVC sheathed / XLPE power cable of 1.1 KV grade of following size direct in ground including excavation, sand cushioning, protective covering and refilling the trench etc as required. 3.5Cx300 Sq MM AL Armoured XLPE Cable Preferred Make:: Polycab/Finolex/RR Kabel

Supplying and making end termination with brass compression gland and aluminium lugs for following size of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 KV grade as required. For 3.5Cx300 sqmm AL XLPE Armoured Cable

Supply, fixing and connection of XLPE, 2xWY type, 1.1KV grade, Armoured cable in surface/ recessed with steel conduit along with tinned copper lugs for connection as required. 3C X 6 sq. mm XLPE armoured cable Preferred Make:- Polycab/Havells/Finolex/RR

Supply and Wiring for circuit/ submain wiring alongwith earth wire with the following sizes of FRLS PVC insulated copper conductor, double core unarmoured cable in surface/ recessed with steel conduit as required. 2Cx1.5 SQMM Copper FRLSH double core unarmoured control cable. Preferred Make: Polycab/Havells/Finolex/RR

Supplying and drawing of UTP 4 pair CAT 6 LAN Cable in the existing surface/ recessed Steel/ PVC conduit as required for the BMS communication. 1 Run of cable

Supply, Laying of one number PVC insulated and PVC sheathed / XLPE power cable of 1.1 KV grade of following size direct in ground including excavation, sand cushioning, protective covering and refilling the trench etc as required. 3.5Cx70 Sq MM AL Armoured XLPE Cable Preferred Make:: Polycab/Finolex/RR Kabel

Supplying and making end termination with brass compression gland and aluminium lugs for following size of PVC insulated and PVC sheathed / XLPE aluminium conductor cable of 1.1 KV grade as required. For 3.5Cx70 sqmm AL XLPE Armoured Cable

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 . )

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