SPECIAL REPAIRS FOR REPLACEMENT OF CENTRAL AC PLANT AT B SHED WORK SHOP P 555 MINE WORKSHOP OF NAD UNDER AGE E M NO II OF GE U II VISAKHAPATNAM

Supply, installation, testing and commissioning of factory assembled Water Cooled Scroll Chiller with Eco friendly R-407C (or) R-410A refrigerant, not less than 40 TR nominal capacity as per manufacturers standards complete with multiple hermetic sealed scroll compressors with multiple refrigerant circuits with refrigerant cooled, 3 Ph., 2 pole, squirrel cage induction motor in each chiller, unit mounted starter panel, water cooled shell & tube type condenser with both side finned copper tubes, shell & tube type evaporator with integral finned cooper tubes with 19mm nitrile rubber insulation, suitable expansion device, flow switch at chiller and condenser, anti-vibration rubber mounts, integral refrigerant piping and power / control cabling from starter to unit, grooved couplings for cooler water in/out connections, complete charge of R-407C (or) R410A refrigerant and oil, refrigerant piping, fittings, valves and accessories to inter connect compressor, condenser, chiller and expansion valve. Refrigerant line accessories like safety valves, angle valve, liquid line indications, liquid level control etc complete accessories as required, lubrication device consisting of automatic electric oil pump, oil cooler, head tank, oil strainer, and automatic pressure regulating valve, oil heater, oil heater thermal switch etc. as required. Dial type 6'', SS tubing with valves thermometers and pressure gauges at inlet and outlet of chiller complete etc complete as required, automatic and safety controls mounted in central micro-processor based control panel. Motor shall be suitable for 415±10% V, 50 cycles, 3 phase AC supply and motor cable terminal box shall be suitable to connect 3 ph, 4 wire power cabling. The chillers shall be inbuilt with protections for Anti-freeze, HP/LP, Single phase, Phase loss, Overload, Over-current, Under-current, Reverse rotation, High discharge temperature trip, Low flow trip etc complete. Frame work for mounting the above condenser, fans, chiller compressor and motor with base plate complete with antivibration pads/springs complete etc as required. All chillers to be AHRI certified and sourced from AHRI certified MAKE IN INDIA manufacturing facility. The chillers shall be pre-wired, fully charged and run-tested at factory prior to despatch. Chillers must have star labelling efficiency norms 3 star ISEER COP 5.6 (2 Working + 1 Standby).

(a) Nominal Cooling Capacity : Not less than 40 TR (minimum) (b) Evaporator: (i) Leaving temperature : 12 °C (ii) Entering temperature.: 7 °C (iii) Delta T : 5 °C (iv) Flow rate : 6.4 l/s (min) (v) Design pressure : 150 psig (water side) (vi) Fouling factor : 0.018 M2. K/KW (c) Condenser: (i) Leaving temperature : 35 °C (ii) Entering temperature.: 30 °C (iii) Delta T : 5 °C (iv) Flow rate : 7.8 l/s (min) (v) Design pressure : 150 psig (water side) (vi) Fouling factor : 0.044 M2. K/KW (vii) Total heat rejection: 164.2 KW

Supply, installation, testing and commissioning of monoblock, self-priming, single-stage centrifugal pump, capable of 7.9 LPS discharge at 14 MWC head, having cast iron casing, enclosed type dynamically balanced cast iron impeller, carbon steel pump shaft, gland packed sealing, deep groove ball bearings, etc. with TEFC squirrel cage induction motor having class 'B' insulation, IE3 efficiency, conforming to IS 12615: 2018 and suitable for operation on 3-Ph, 415 V±10%, 50 Hz AC supply, base plate, mounting channel frame, accessories and fittings, viz. drains, coupling, coupling guard, vibration isolation arrangement by means of spring / rubber type mounting duly insulated and other necessary accessories complete all as specified and directed by engineer-in-charge. Make: Kirloskar [KDS-335++*], Mather & Platt, Crompton Greaves Note :[i] Rates for necessary civil work viz. foundation for placement of pump and pump accessories deemed to be included in quoted rate. (Chilled water pumps)

S & F multilayered HDPE make-up water tank of 5000 litre capacity made up of 100% virgin material, having 100% UV stabilized white outer layer, threaded lid, extra insert lid for protection against algae formation complete with inter-connection piping and non-return valve etc. complete all as specified and directed. Note :- Necessary pipe and NRV etc will measured and paid separately.

Supply, installation, testing and commissioning of monobloc, self-priming, single-stage centrifugal pump, capable of 10.7 LPS discharge at 12 MWC head, having cast iron casing, enclosed type dynamically balanced cast iron impeller, carbon steel pump shaft, gland packed sealing, deep groove ball bearings, etc. with TEFC squirrel cage induction motor having class 'B' insulation, IE3 efficiency, conforming to IS 12615: 2018 and suitable for operation on 3-Ph, 415 V±10%, 50 Hz AC supply, base plate, mounting channel frame, accessories and fittings, viz. drains, coupling, coupling guard, vibration isolation arrangement by means of spring / rubber type mounting complete all as specified and directed by engineer-in-charge. Make: Kirloskar [KDS-318++**], Mather & Platt, Crompton Greaves Note:[i] Rates for necessary civil work viz. foundation for placement of pump and pump accessories deemed to be included in quoted rate.

Supply, installation, testing and commissioning of FRP rectanguler shape, vertical, induced draught counter flow cooling tower of 80 TR size with uniform water distribution and optimal heat transfer, having tough fiberglass reinforced plastic (FRP) casing of sufficient structural strength to withstand vibrations and wind velocity upto 60 m/s, FRP basin, rigid honeycomb type PVC fill of suitable thickness, SS sprinklers and non-clogging sprinkler pipes, FRP drift eliminator, energy efficient induced draught axial type fans with factory set and dynamically balanced blades pitch, IE3 TEFC squirrel cage induction motor, suitable for operation on 3- Ph, 415 V, 50 Hz AC supply with IP 65 protection for enclosure, conforming to IS 12615: 2018, inlet, outlet, drain and over-flow nozzle connections, etc. complete with accessories as specified and directed by the engineer-in-charge. Make: Advance, MIHIR, Delta, National, PAHARPUR Note:[i] Rates for necessary civil work viz. foundation for placement of pump and pump accessories deemed to be included in quoted rate.

100 mm dia

80 mm dia

65 mm dia