REPAIR /MAINT OF CENTRAL/ PACKAGE AC PLANTS AND CONNECTED WORKS AT NORTH SIDE AND SOUTH SIDE RUNWAY UNDER GE (NW) VASCO

Material and labour for cleaning of shell and tube water cooled condensers of the A/C plants of following capacities after dismantling the water lines and headers and cleaning with suitable wire brush and washing soda to remove the dirt and water scaling and refixing the water lines and headers including provision of new gaskets, etc. for following AC plants complete all as directed by Engineer-in-Charge.

(a) 2x30 TR capacity at OLD BMF AC plant

(b) 3x48 TR capacity at EHU/ERS AC plant

(c) 03x75 TR capacity at TU Hangar AC Plant

(d) 02X37.7 TR capacity at BSF AC plant

(e) 04 X 60 TR Capacity at MIG Simulator AC Plant

(f) 02X12.5 TR EHU AC plant

(g) 03 X 25 TR capacity at Mag Guard AC Plant

(h) 3x49.5 TR capacity at ATC AC plant

(i) 3x49.5 TR capacity at ADR AC plant

(j) 03x75 TR capacity at Sh Harrier Simulator AC Plant

(k) 02X12.5 TR capacity at AL/AR AC plant

(l) 03 X 25 TR Capacity at NTS AC Plant

(m) 03X5.5 TR Package unit EW wksp AC plant

Note : Cleaning of all units of an AC Plant will be treated as One Time only.

Supply and charging compressor oil Servo manufactured by Indian Oil Corporation or Equivalent approved make including flushing/cleaning of oil chamber etc. complete all as directed by Engineer-in-Charge.

Supply and filling Refrigerant gas R-22 /Mafron -22 for AC plant compressor

Supply and filling Refrigerant gas R-407 for AC plant compressor Note :- If required the gas charging of any areas, compressor & capacity.

Supply and fix in repairs ball / roller bearing for pumps and motors of following capacity including taking down old bearing and re-installation at site including testing on completion.

(a) Up to 5 HP capacity

(b) 5 to 7.5 HP capacity

Material and labour for servicing Monoblock pumps including dismantling and opening the pump, repair/replacement of defective impeller, replace the worn out bearing impeller, stuffing box, back plates, gland packing mechanical seal and rusted nut, bolts etc. assembling property , greasing all movable parts, fixing in position, testing and commissioning all as directed for the following HP pumps.

(a) 3 HP to 5 HP Pump

(b) 7.5 HP to 10 HP Pump

Dismantling the unserviceable electric motor any type (for pump or CT) of capacity up to 3 HP and transporting to reputed workshop, taking out old and burnt winding wire and rewinding with super enameled copper winding wire of existing gauge and size with insulating materials, varnishing and baking etc. re-fixing the same at site and re-alignment, testing and commissioning complete all as directed by Engr-in-Charge.

All as per Item No-7 as above but of 5 to 7.5 HP.

Supply and fix in repairs condenser Monoblock water pump set 3 to 5 HP 3 phase capacity with suitable head and discharge ammunator store including necessary PCC foundation work and electric/ water connection complete all as directed.

Supply and fix in repair replacement of V-belt for AHU for AC Plant of size B-101.

All as per item No-10 as above but of size B-85.

All as per item No-10 as above but of size B-90.

All as per item No-10 as above but of size A-53.

All as per item No-10 as above but of size B-75.

Supply and fix in replacement of High pressure control switch as per existing make and type at site all as specified and directed by Engr-in-charge.

Supply and fix in replacement low pressure control switch as per existing make and type at site all as specified and directed by Engineer-in-charge

Supply and fix in replacement condenser/chilled DP flow switch as per existing make and type at site all as specified and directed by Engineer-in-charge.

Supply and fixing in replacement of power contactor assembly including NO and NC type complete capacity up to 63 A with all as directed by Engineer-in-Charge.

Supply and fixing in replacement of insulator/connector as per existing shape and sizes.

Disconnecting wiring carefully and removing defective auxiliary power contactor assembly complete and replacing by new one of same make and model, reconnecting wiring and testing on completion 400/415 volts all as directed by Engineer-in-charge.

Supply & fixing digital type ammeter panel mounting three phase LED type 96 x 96 mm square including taking down old meter.

Supply & fixing digital type voltmeter panel mounting three phase LED 96 x 96 mm square including taking down old meter.

Supply and fixing current transformer secondary current 5 Amps and primary current up to 60 Amps including taking down old current transformer.

Supply and fixing in repair thermometer suitable for condenser water/ chiller line with suitable housing to mount in pipe line 0 – 100 deg C including taking down old thermostat.

Supply and fixing in repair Pressure Gauge for condenser water/Chiller line with suitable housing to mount in pipe including taking down old.

Supply and fixing indicator lamp assembly complete LED type suitable for the existing system supply voltage for the existing system supply voltage 230V / 440 V AC including taking down old lamp assembly.

Supply and fixing in repair of MCCB 3 pole 415 volts AC , 100 Amps breaking capacity 16 KA.

Supply and fixing in repair of MCCB 3 pole 415 volts AC , 250 Amps breaking capacity 25 KA.

Supply and fixing in repair of MCB 4-pole 40 to 63 Amps 10 KA.

Supply and fixing in repair of MCB SP 06 to 32 Amps 10 KA.

Supply and fixing in repair of MPCB for pump of capacity up to 5 HP capacity Chiller/Compressor Pump.

Supply and fix in repair Motor Protection circuit breaker (MPCB) suitable for chiller/condenser pump of capacity 5 to 7.5 HP complete with over load relay , single phasing preventer under volt release in existing enclosure etc.

Supply and fixing in repair of step-down Voltage transformer 240V / 24 V for HVAC panel AC plant all as directed by Engineer-In-Charge.

Supply and fix in repair replacement of chiller unit touch Screen display of AC Plant of capacity from 49.5 TR all as directed by Engineer-In-Charge.

Nitrogen testing for the following capacity of compressors including condensing unit and gas piping complete as directed by Engineer in Charge.

Note :- (i) Nitrogen pressure should be held with out any drop in pressure inside the unit continue for 24 hours.

(a) 2x30 TR capacity at OLD BMF AC plant

(b) 3x48 TR capacity at EHU/ERS AC plant

(c) 03x75 TR capacity at TU Hangar AC Plant

(d) 02X37.7 TR capacity at BSF AC plant

(e) 04 X 60 TR Capacity at MIG Simulator AC Plant

(f) 02X12.5 TR EHU AC plant

(g) 03 X 25 TR capacity at Mag Guard AC Plant

(h) 03 Unit x 49.5 TR (2W + 1S) capacity at ATC AC plant

(i) 03 Unit x49.5 TR (2W + 1S) capacity at ADR AC plant

(j) 03 Unit x75 TR (2W + 1S) capacity at Sh Harrier Simulator AC Plant

(k) 03 Unit X12.5 TR (2W + 1S) capacity at AL/AR AC plant

(l) 03 Unit X 25 TR (2W + 1S) capacity at NTS AC Plant

(m) 03 Unit X5.5 TR (2W + 1S) Package unit EW wksp AC plant

Supply and fix in replacement of CT fan (with hub and fan blade) of capacity 30 to 75 TR cooling tower all as specified and directed by Engineer-in-Charge

All as per item No-36 as above but of AC Plant of capacity 12.5 to 25 TR.

Supply and fix in replacement of energy efficient induced draught axial type fans with factory set and dynamically balanced blades pitch squirrel cage induction motor, suitable for cooling tower of capacity 125 TR to 200 TR operation on 3- Ph, 415 V, 50 Hz AC supply with IP 65 protection for enclosure all as directed.

Supply and fix in replacement of rectangular shape side wall made of FRP for vertical induced draught counter flow cooling tower of capacity 125 TR to 200 TR with uniform water distribution and optimal heat transfer, having tough fiberglass reinforced plastic (FRP) casing including necessary MS frame for sufficient structural strength to withstand vibrations and wind velocity up to 60 m/s all as directed.

Supply and fix in replacement of FRP basin for capacity of 125 TR to 200 TR cooling tower with accessories:- 1. Rigid honeycomb type PVC fill of suitable thickness, 2. SS sprinklers and non-clogging sprinkler pipes, 3. FRP drift eliminator including inlet, outlet drain and 4. over-flow nozzle connections, etc. complete with accessories as specified and directed.

Supply and fix in replacement of XLPE insulated, armored heavy duty electric cable with aluminum conductor, 1100 Volts grade of size 3.5 core X 25 sqmm.

Material and labour for LT Cable XLPE insulated heavy duty armoured sheathed 1100 volts grade 95 Sq mm, 3½ core, with aluminium conductor complete including taking down old unserviceable as specified.

All as per item No-42 as above but for 120 sqmm 3½ core cable.

Supply and fix in repairs of solenoid switch for AC Plant of 12.5 to 25 TR AC Plant of capacity all as directed by Engineer-In-Charge.

All as per item No-44 as above but of AC Plant of capacity 30 to 75 TR.

Supply and fix in repair replacement of MS pipe including all special heavy duty cutting and duly welded with 16 mm thick MS flange and drilled for fixing 16 mm dia bolt & nuts washer including rubber gasket etc. all as specified and directed of following sizes :-

(a) 100 mm dia

(b) 80 mm dia

(b) 50/63 mm dia

BUTTERFLY VALVE: Supply and fix of water type CI butterfly valve and standard flange end with necessary accessories including dismantling of existing old one of following size complete all as specified and directed.

(a) 80 to 100 mm NB

(b) 100 to 150 mm NB

Supply and fix in repair replacement of On line, Non-Chemical Water Treatment Scale Preventer System including necessary accessories required for Plant of Capacity 30 TR to 75 TR all as directed by Engineer-In-Charge.

All as per item No-48 as above but of AC Plant capacity from 5.5 TR up to 25 TR.

Supply and fixing in repair fabricated micro filter up to 90 micron made out of GI channel frame overall size 610 mm x 610 mm x 50 mm including nylon micro filter front and back all as per sample given including taking down old micro filter.

All as per item No-50 as above but of size 610 mm x 305 mm x 50 mm.

Supply and fix in repair/replacement of chilled water sensor for AC Plants of various capacity.

Supply and fix loading/unloading switch assembly for compressor of capacity 12.5 to 25 TR AC Plant per unit.

Supply and fix loading/unloading switch assembly for compressor of capacity from 30 TR up to 75 TR per unit.

Supply and fix microprocessor for compressor of capacity from 12.5 TR to 25 TR per unit including complete wiring all as directed by Engineer-In-Charge.

All as per item No-55 as above but of AC Plant of capacity 30 to 75 TR.

Supply and fix cooling tower nozzles for various type of AC plant as existing shape and size all as directed by Engineer-In Charge.

Supply and fix block bearing for air handling unit of any size.

Supply and fix in replacement of strip heater 2 KW capacity including making electrical connections with main supply complete all as specified and as directed.

Supply and fix in replacement of strip heater 3 KW capacity including making electrical connections with main supply complete all as specified and as directed.

Supply and fix in replacement of HDPE make up water tank of 1000 litre capacity with air vent, drain, overflow and make up connection with PVC High Pressure float valve complete all as specified and directed by Engr-in-charge.

Supply and fix in replacement of HDPE make up water tank of 5000 litre capacity with air vent, drain, overflow and make up connection with PVC High Pressure float valve complete all as specified and directed by Engr-in-charge.

Supply and fix in repairs liquid line drier for AC Plant of 12.5 to 25 TR AC Plant of capacity all as directed by Engineer-In-Charge.

Supply and fix in repairs liquid line drier for AC Plant of 30 to 75 TR AC Plant of capacity all as directed by Engineer-In-Charge.

Material and labour for replacement of tarpaulin canvas cloth connecting the air outlet and main duct of AHU as per existing size and thickness including provision of chain with Zip for taking Wet/ Dry Bulb reading, angle iron complete, including taking out unserviceable as directed.

Supply and fix in repair replacement of aluminum extruded powder coated Square type (600 x 600mm grid ceiling type) Supply/Return air diffusers with VCD.

Supply and fix in repair replacement of 350 mm dia size Flexible Duct of insulated flexible ducting with its matching supports and other accessories. Flexible Duct are made out of flexible plastic over a metal wire coil to make round, with layer of fiberglass insulation.

Supplying and fixing of in repairs thermal insulation 25 mm thick aluminium foil faced resin bonded fibre glass insulation (on duct ) of density 32 kg/cu.m with self adhesive tape complete as per specifications and as required.

Dismantling carefully and removing of old U/S compressor's sealed unit of up to 12.5 Ton capacity from any type Air conditioner and supply and fix new sealed unit of same capacity complete with all standard accessories as per existing AC plant. Note:- Sealed unit shall be purchased from authorized dealers/agents

All as per item No-69 as above but of Ductable AC of capacity 8.5 TR.

Supply and fix in repairs Condensing coil unit suitable for out door unit of 8.5 TR Ductable type AC unit, including dismantling the old one all as directed.

Taking down carefully indoor/outdoor unit of Casset type AC unit of VRF AC of existing capacity, servicing (Wet and Dry service will be done) complete as per manufacturer direction, reinstallation of the same at exist position/location all as directed. NOTE :- The Service inclusive the following :- (i) Wash the filter with clean water, cleaning all the sides gently, wash out accumulated dust and lint/fabric with water. (ii) Clean the front grill with a clean cloth gently, damp with mild liquid dish washing detergent. (iii) Clean the cabinet by using mild soap or detergent and warm water. (iv) Electric/electronic items found defective during servicing will be executed, measured and paid separately under relevant item of this schedule .

Supply and fix in repairs of Evaporator fan blower motor as per existing capacity all as directed by Engineer-In-Charge.

Rewiring of all electrical controls including Micro- processor, electric contactor, supply and fix in replacement of auxiliary contactor for one of central AC plant/ package type AC plant of any capacity all as directed

Supply and fix in repairs of Relief Valve complete all as directed by the engineer-in-Charge.

Supply and fix in repairs of Hand shut off valve complete for 12.5 to 25 TR Capacity Package type AC plant.

All as per item No-76 as above but of AC Plant of capacity 30 to 75 TR.

Material and labour Preparation of old painted surfaces by removing dust, rust etc and, applying two coats of synthetic enamel paint with spray gun of approved make and colour for cooling tower, condensing pipe line, condenser water pumps including all pipe line valves and control panel etc. of 5.5 TR to 25 TR Capacity Plant.

All as per item No-78 as above 30 TR - 75 TR AC Plant unit.

Supply and fix in repair 3-Way Diverting ON/OFF Valve 80-100 mm dia size of CI body in a single body. The actuator shall be for ON/OFF operation of valve & shall be suitable for 230 ± 10% V & 50 Hz. The valves shall be complete with thermostat control box for precise control of the supply air to achieve 18°C temperature inside the given space fitted with sensors in return air and contactors/breakers as required & control wiring complete all as specified and directed by Engr-In-Charge.

Material and labour for Earthing complete with Galvanised earth plate electrode 600 x 600 x 6 mm thick buried directly in ground earth pit not less than 2.25mtr deep below normal ground level with top edge of the plate not less than 1.5 mtr below normal ground level connected to galvanised earth wire 4 mm dia by mean of nuts/bolts, check nuts and washers of brass as shown in electrical plate No. 5 of SSR part-I including necessary excavation and earth work, GI Pipe 15 mm bore light grade for watering with Funnel, wire mesh and protection to earth lead shall be provided with GI pipe light grade 20 mm dia up to 7.5 mtr from the earth plate electrode and refilling of soil including adequate quantity of charcoal dust and common salt etc & earth work in any strata, PCC pit chamber in cement mortar 1:3:6 type C-2 with 40 mm thick Precast RCC cover slab 1:2:4 type B with 8 mm dia TMT bar and handle with lifting hooks including testing any type complete all as specified and directed by Engr-in-charge.

Supply and fix in repairs of Thermostatic Expansion Valve assembly complete for 12.5 to 25 TR Capacity Package type AC plant.

All as per item No-82 as above but of AC Plant of capacity 30 to 75 TR.

Supply and fix in repairs of 40 KVAR Power Factor Correction Capacitor unit configuration all as specified.

All as per item No-84 as above but of 10 KVAR Capacity.

Supply and fix in repairs of 8.5 TR Dictable AC unit HVAC control Panel with advanced microprocessor with digital display, Push Button/Switch control and safety function like auto-restart, single phase protection, relay and complete wiring as per existing all as directed by Engineer-In-Charge.

Comprehensive maintenance of VRF AC plant at BSF comprising of routine, preventive & breakdown maintenance comprising of all devices and accessories through out the contract period on all days including Sundays & holidays.

Notes: 1. The contractor shall be responsible for periodical maintenance, as per maintenance schedule attached and specified including renewal / replacement of parts, fittings / fixtures filling of refrigerant gas etc required for smooth functioning of the plant as per manufacturer's instructions. The inspection and servicing of Outdoor Condenser Unit including sensors, PCB and Evaporator shall be carried out, and reported on each visit.

2. All spares of minor/major nature required to keep the plant in healthy functional state are considered to be included in the above-mentioned annual maintenance. All defects shall be repaired promptly. Non-operation of plant due to any defect or inability to maintain the desired temperature and humidity inside the premises shall invite penal charges. The penalty applied will be @ ₹1000 per hour in case of repairs/rectification to achieve the requisite conditions are not completed within 6 hours of reporting by department. Not attending breakdowns which necessitates components/parts replacement shall be penalized as under :- (a) Attending breakdown within7 days - ₹ Nil (b) Attending breakdown within 7 to 21 days - ₹ 2000/- per breakdown per day (c) Attending breakdown after 21 days to 30 days - ₹ 9,000/- per breakdown per day Data loggers place at the premises will be referred in support of the functioning or non-functioning of the plant.

Charges for attending break down of AC plant of 12.5 TR to 25 TR capacity for fault finding including attending repairs as and when required such as No start condition of AC plant and repairing, starting the AC plant till smooth running and setting up the alignment/required parameters of all major parts such as fan belt, compressor, gas charge, cooling tower, power contactor, starter, MCCBs, Micro processor based control panel, pumps etc. as required in ground all as directed.

All as per item No-88 as above but of AC Plant of capacity 30 to 75 TR.

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