REPAIR MAINTANANCE OF CENTRAL AC PLANT SPLIT WINDOW AC DEEP FREEZER REFRIGERATOR AND WATER COOLER AT DIBRUGHARH CHABUA GANESHBARI FSD PANITOLA AND LAIPULI UNDER GE DINJAN NO 2

Comprehensive Maintenance of Water cooled Central Air Conditioning Plant installed in Technical block at 58 WEU Ganeshbari area comprising of Compressors, Condensers, Evaporators, Expansion Valves, Condenser Water Pump, Chilled Water Pump, Cooling Towers, AHUs, Pipe Lines, Ducts, Electrical Control Panels, Power & Control Cables etc, and connected equipment complete including attending to breakdowns / complaints and carrying out Repairs / Overhauling / Servicing / Descaling, leak testing, arresting leakages/brazing of condensor tube, refilling of refrigerant gas after leak testing etc and Replacement of defective parts to ensure smooth operation and efficient functioning of AC Plant to the entire satisfaction of Engineer-in-Charge for the following type and capacity of AC Plant :- Note: Descaling will be carried once in 06 month (i) Water cooled Central AC Plant of following capacity :- (a) Central AC Plant of capacity (3×50 TR)

(c) Supply and fixing of all Minor Spares viz. Mechanical / Electrical / Electronic etc. as and when required for trouble free and smooth operation of AC Plants. All the safety measures shall be ensured for serviceable condition round the clock and cost of their spares and consumables etc. shall dee (d) Cost of spares required for maintenance of AC Plants other than those catered under this schedule / BOQ, Consumables such as Grease, Lubricants, Cotton waste and other connected consumables etc. required for daily operation and routine maintenance shall deemed to be incuded in the quoted rates and nothing extra shall be paid on this account. (e) Contractor shall rectify the defects within 24 hours as directed by the Engineer-in-Charge. (f) Contractor shall maintain the temperature of AC Plant as per the designed conditions at all times. (g) Necessary Tools and Plants, Testing Instruments and Safety Equipment for tradesman etc shall be readily available at site during contract period. (h) The contractor shall arrange Dry / Wet Bulb Thermometer for recording hourly room temperature and Humidity Display Unit / Instrument for continuous monitoring. (j) On completion of comprehensive maintenance the contractor shall carryout the complete system and controls functional test before handing over of the plant to department. (k) Conveyance and communication system such as two wheeler & mobile phone shall be provided by the contractor to all electricians and refrigeration mechanics for timely attending the complaints and maintenance of AC plants.

Supply only R-407C refrigerant gas.

Supply only nitrogen gas for leak testing of central AC Plant system complete all as specified and as directed.

Supply only Programmable control board, expansion boards and display boards suitable for 50 TR capacity Central AC Plants including testing complete all as specified and as directed.

Supply only MCCB, 4 Pole, 500 Amps, 36 KA, thermal magnetic release, adjustable overload and short circuit, Ics = 100% Icu, AC 3 phase, 415 Volts, 50 Hz, with and including spreader terminals complete all as specified and as directed by the Engineer-in-Charge.

Supply only MCCB, 4 Pole, 125 Amps, 16 KA, thermal magnetic release, adjustable overload and short circuit, Ics = 100% Icu, AC 3 phase, 415 Volts, 50 Hz, with and including spreader terminals complete all as specified and as directed by the Engineer-in-Charge.

Supply only MCCB, 4 Pole, 63 Amps, 16 KA, thermal magnetic release, adjustable overload and short circuit, Ics = 100% Icu, AC 3 phase, 415 Volts, 50 Hz, with and including spreader terminals complete all as specified and as directed by the Engineer-in-Charge.

Supply only MCCB, 4 Pole, 40 Amps, 16 KA, thermal magnetic release, adjustable overload and short circuit, Ics = 100% Icu, AC 3 phase, 415 Volts, 50 Hz, with and including spreader terminals complete all as specified and as directed by the Engineer-in-Charge.

Supply only power contactor 3 pole, coil voltage 230/415 Volts, 50 Hz with 1NO + 1NC complete all as specified and as directed for following ratings:-