REPAIR REPLACEMENT AND ROUTINE MAINTENANCE OF CENTRALISED AC PLANT AT NEELAMBER AUDITORIUM AND COMPREHENSIVE MAINTENANCE OF CENTRALISED AC PLANT 700 TR AND 150 TR INCLUDING CONNECTED ITEMS INSTALLED AT HQ SWAC VSN GANDHINAGAR UNDER GE AF CHILODA

M & L for Comprehensive maintenance for chilling package of (350X2=700 TR) Screw type refrigeration Compressor with R134A refrigerant with Microprocessor panel and suction and Discharge control valves including one annual and three periodical inspection during the contract period at approximately equal intervals by the OEM and the maintennace programm will proceed as and when required as per the inspection report provided by company reprenstative and servicing of complete power supply system of the AC Plant including sub panels complete all as specified and directed by the engineer in charge.

M & L for Comprehensive maintenance for chilling package of (50X3=150 TR) Scroll type refrigeration Compressor with R407C refrigerant with Microprocessor panel and suction and Discharge control valves including one annual and three periodical inspection during the contract period at approximately equal intervals by the OEM and the maintennace programm will proceed as and when required as per the inspection report provided by company reprenstative and servicing of complete power supply system of the AC Plant including sub panels complete all as specified and directed by the engineer in charge.

(k) All the breakdowns including compressor failure will be attended and the visit shall not be counted in periodical inspection. (l) Check refrigerant filter and drier core, replace the same , if found necessary. (m) Check oil level and oil heater in the system. (n) Check chilled water flow by checking pressure drop across the chiller (o) Check evaporator and condenser approach and compare the chilled water temperature at full load with the chilled water temperature control (p) Seasonal adjustment of controls if required and software upgrade (q) Inspect entire system for any unusual condition such as noise, vibration etc (r) Supply of electrical parts except electrical spares for incoming panel. (Electrical Spares Like:- fuses, incoming electrical controls, flexible wire, All type of starter parts including wiring etc) (s) All changes/ repair shall be valid only after satisfaction of Engr-in-charge/GE. Contractor shall submit all related documents of expenditure of AMC time to time to avoid delay on payment (t) Checking the operation of all suction and discharge control valves etc If found faulty /leakage to be replaced by the contractor with out any extra cost. (u) Filling of oil. (v) The contractor shall also arrange require tools for attend routine services/minor breakdown call like an adjustable spanner, clamp meter, pressure gauge with garging line, digital tamperature gun, fix spanner set, Allen key set, serew driver set, cotton waste software support if require.

(w) The contractor shall also arrange require equipment's for attend major breakdown call like as a vaccum pump, Digital Vaccum gauge, Refrigerant recovery unit, Empty refrigerant cylinders, dehydration tank and require spanners. (x) clean the cooling tower and Drain the water and clean the sump of cooling tower, Clean pot stainer/y-stainer, check the condition of fills, if required, clean the fills with detergent, check for operation of shut off valves. (y) If AC Plant have occur any breakdown take immediate action arrange to provide all necessary material, T&P and labour, unable to provide material and delay in smooth operation/working of AC Plant/AHU etc recovery will be done on the based of Rs.3000/- per hour Note:- Descaling of condenser and chiller tubes, Checking leakage of refrigerant and nitrogen pressure testing including nitrogen,Gas (Refrigerant), Temperature sensor,Bellows, Differential pressure switch unit, Expansion Valve, Compressor Oil, Servicing of Secondary pump, Servicing of primary & Secondary pump, Servicing of chiller water pumps/condensor water pump, Servicing of blowers for AHU's with induction motor, single phasing preventor, electronic timer will be under items of BOQ.

M & L for Descaling of 350X2=700 TR (chemical cleaning and physical cleaning) of condenser and chiller tubes all as specified and directed by Engr-in-Charge.

M & L for Descaling of 50X3=150 TR (chemical cleaning and physical cleaning) of condenser and chiller tubes all as specified and directed by Engr-in-Charge.

M & L for Checking leakage and shortage of refrigerant in the machines of 350X2=700 TR/ 50X3=150 TR with soap solution and rectify the system defect causing leakage rectification including topping up of refrigerant. If leakage is not rectified by the soap solution then nitrogen pressure testing will be carrid out to identify the refrigerant leakage through the chiller machine and refilling/topping up of refrigerant. Amount quoted by the contractor should be inclusive of cost of nitrogen pressure testing including Nitrogen complete all as specified and directed by Engr-in Charge

Supply & filling Gas R134A/ R407C of 350X2=700 TR/50X3=150 TR unit for AC Plant complete all as specified and directed by Engr-in Charge

Supply and fix in repair Temperature chilled water sensor/Temperature cooling water sensor as per exsisting sample of AC Plant complete all as specified and directed by Engr-in Charge

S & F in repair Bellows of size 250x200 mm as per existing complete all as specified and directed by Engr-in Charge.

S&F in repair differential pressure switch unit as per exsisting sample of 350X2=700 TR/ 50X3=150 TR Ac plant complete all as specified and directed by Engr-in Charge.

S & F in repair Expansion Valve as per exsisting sample including all connected accessories of AC Plant complete all as specified and directed by Engr-in Charge.

Supply & filling Compressor Oil of AC Plant complete all as specified and directed by Engr-in Charge.

M&L for servicing of back pull out primary chilled water pump with induction motor of Cap- 20 HP operated on 240V, 50 Hz with replacing of diffective parts such as box, mechanical seal , cut off switch, bearing , complete all as specified and directed by Engr-in-charge.

M&L for servicing of back pull out Secondary chilled water pump with induction motor of Cap- 30 HP operated on 240V, 50 Hz with replacing of box set-04 nos, mechanical seal -01 no, cut off switch 01 no, bearing 02 nos, Air filling in tank complete all as specified and directed by Engr-in-charge.

M&L for servicing of back pull out condensor water pump with induction motor of Cap- 40 HP operated on 240V, 50 Hz with replacing of diffective parts such as box, mechanical seal , cut off switch, bearing , complete all as specified and directed by Engr-in-charge.

M&L for servicing of back pull out chiller water pumps/condensor water pump with induction motor of Cap- 5 HP operated on 240V, 50 Hz with replacing of box set-04 nos, mechanical seal -01 no, cut off switch 01 no, bearing 02 nos, Air filling in tank complete all as specified and directed by Engr-in-charge.

M&L for servicing of blowers for AHU's with induction motor of Cap- 10 HP operated on 240V, 50 Hz with replacing of diffective parts such as box, mechanical seal , cut off switch, bearing , Fan Belt complete all as specified and directed by Engr-in-charge.

(a) Check the alignment and conditions of coupling to prevent damage to shaft and impeller.

(b) Lubricate bearings with grease guns.

(c) Replace gland thread if required.

(d) Check lubricant oil level and make up the oil if required.

(e) Check packing and mechanical seals for leakage.

(f) Half yearly inspection and service for pumps

(g) Inspect shaft sleeves,shaft, bearings , bearing housing and overhauling of all pumps.

(h) The impeller and shaft to be repaired and made functional. If they are found not repairable, then same will be replaced .

(i) The packing, mechanical seal, bush, bearing, Shaft sleeves, coupling Fan belt etc. If found faulty to be replaced by the contractor with out any extra cost.

Descaling of condenser and chiller tubes to meet the designed specifications of flow of refrigerant in compressor and water in condenser. Descaling will be measured and paid under respective item of this schedule.

Check leakage and shortage of refrigerant in the machines with soap solution and rectify the system defect causing leakage including topping up of refrigerant.Cost of Refrigerant required for topping up will be measured and paid separately under respective item of this schedule.

Carry the proper functioning of microprocessor panel and take the control test quaterly and the report needs to be submitted at the time of RAR.

Monthly Checking for proper working of all Ammeters, voltmeters, Hour mtrs, KWH Mtrs and overload relays etc and replacing the same if found unserviceable

Monthly Cleaning of electrical panels and chiller machine periodically.

Monthly Checking of functioning of water flow switch and interlock in the system.

Monthly Checking of all safety and operating controls for proper functioning and replace if the same is defective for proper sequence of operation of the machine

All the breakdowns including compressor failure will be attended and the visit shall not be counted in periodical inspection.

Monthly Checking of refrigerant filter and drier core, replace the same , if found necessary.

Monthly Checking of oil level and oil heater in the system and top-up the oil if found necessary.

Monthly Checking of chilled water flow by checking pressure drop across the chiller

Monthly Checking of evaporator and condenser approach and compare the chilled water temperature at full load with the chilled water temperature control

Seasonal adjustment of controls if required and software upgrade once during the contract period

Inspect entire system for any unusual condition such as noise, vibration etc Contractor should be responsible for providing the items to the operators such as cotton waste, grease, oil, insualtion tape, temperature record instruments for AC, tool kit Ref Mect , Hand gloves, discharge Rod upto 11000 Volts, pipe wrench up to 300mm, taflon tape, Earth tester, multimeter, tounge tester respectively,fiirst aid kit with standard kit , proper sitting arrangement to operator at installation, torch light with cell , cleaning material etc all as directed by Engr-in-Charge

Supply of electrical parts except electrical spares for incoming panel. (Electrical Spares Like:- fuses, incoming electrical controls, cables etc)

Material and labour for maintenance and servicing of the chilled water motor pump assembly complete of cap 7.5 HP including replacement of all worn out belts of specified size, replacement of motor gaskets and greasing to moving parts all as specified and directed by Engr-In-Charge

Material and labour for maintenance and servicing of the condensor water motor pump assembly of cap 10 HP including replacement of all worn out belts of specified size, replacement of motor gaskets and greasing to moving parts all as specified and directed by Engr-In-Charge

(a) Checking the alignment and conditions of coupling to prevent damage to shaft and impeller.

(b) Lubricate bearings with grease guns.

(c) Replace gland rope if required.

(d) Check lubricant oil level and make up the oil if required.

(e) Check packing and mechanical seals for leakage.

(f) Half yearly inspection and service for pumps

(g) Inspect shaft sleeves,shaft, bearings , bearing housing and overhauling of all pumps.

(h) The impeller and shaft to be repaired and made functional. If they are found not repairable, then same will be replaced .

(j) The packing, mechanical seal, bushs, bearings, Shaft sleeves, coupling etc. If found faulty to be replaced by the contractor with out any extra cost.

M&L for taking out & rewinding the existing unserviceable burnt motors of condensor/chiller water motors of Cap 10 HP,Three phase, 50 cycles by disconnecting electrically and mechanically and transporting to the locally workshop. Dismantling the motor and removing the old burnt copper winding & demoisturise, cleaning, rewinding the coils with same gauge supper enamelled copper wire, with suitable F class paper insulation, varnishing, and reassembling by replacing bearings reinstalling at the installation and testing, commissioning etc complete all as specified and directed by Engr-in-Charge

M & L for Cleaning and spray Painting the surface of motors, condenser pipes, chilled water pipes, cable duct supports of angle iron and all other rough surfaces including all valves and fittings including pumps and cooling Tower with two coats of synthetic enamel paint of existing colour over a neat coat of redoxide primer over 10 cm width of girth and making good to the surfaces of all pipe and valves connections at certain places all as specified and directed by Engr-In-Charge

Supply and fix in repair of puff insulation as per site requirement for chilled water piping and valves all as specified and diected by Engr-in-Charge

M & L for Descaling of condenser tubes required to meet the designed pressure conditions and cooling specifications for desired rate of flow of refrigerant in compressor and water in condenser complete all as specified and directyed by Engr-In-Charge

M & L for Nitrogen Pressure testing for water cooled screw chillers including refrigerant Recovery, vacummising and recommissioning of chillers of condenser tubes required to meet the designed pressure conditions and cooling specifications for desired rate of flow of refrigerant in compressor and water in condenser complete all as specified and directyed by Engr-In-Charge

S&F in repair Refrigerant R407 C for topping up of refrigerant in the sytem to compensate any leakge qty of refrigerant. Complete all as specified and directed by Engr-in-Charge

S&F in repair thermometers as per site requirement to be fixed in chiller lines and condensor pipe lines complete all as specified and directed by Engr-In-Charge

S&F in repair automatic star delta starter in sheet steel enclosure AC-3 duty, 415 V, 10 HP,with ralay range 15-30 A complete all as specified and directed by Engr-In-Charge

Supply & fix in repair Contactor type- MCX13 of AC3 80 Amp, 415V, 50 Hz , Complete all as specified and directed by Eng-In-Charge

S&F in repair single phasing preventor Type-ESP-2 , 415 Volt, 50 Hz . Complete all as specified and directed by Eng-In-Charge

S&F in repair electronic timer Type-S/D-C-100 , 230/415 Volt, Complete all as specified and directed by Eng-In-Charge

M & L for Repairing / Servicing of complete all electric supply panels for AHU Rooms by cleaning all MCCB Connections and Bus bars with anti rust spray, replacing of nuts & bolts,washers, with suitable lugs of burnt/rust contacts & fitting of screws & rewiring with suitable guage copper conductor/flexible wires, all as required as per ground condition, with tightening of all loose connections, with testing complete on load all as directed by Engr-in-charge. .

S&F in repair pressure gauges 100 mm dia for condensor water lines and chiller water lines , Complete all as specified and directed by Eng-In-Charge

Supply & fix in repair MCCB 4 pole 250 Amp, 25 KA, 415 volts 50 Hz including operating handle complete all as specified and directed by Eng-In-Charge.

Supply & fix in repair MCCB 4 pole 125 Amp, 16 KA, 415 volts 50 Hz including operating handle complete all as specified and directed by Eng-In-Charge.

Supply & fix in repair MCCB 4 pole 100 Amp, 16 KA, 415 volts 50 Hz including operating handle complete all as specified and directed by Eng-In-Charge.

Supply & fix in repair MCCB 4 pole 160 Amp, 25 KA, 415 volts 50 Hz including operating handle complete all as specified and directed by Eng-In-Charge.

M&L for repair of cooling tower PVC finse AC plant 144 TRcomplete all as specified and directed by Engr-in-Charge.

In case of any break down of AC plant/AHU etc the contractor shall take immediate action and arrange all necessary material, T&P and manpower to smooth operation/working of AC plant/AHU etc, otherwise penalty will be levised on account of non operation of the same @ Rs 10,000/- per hour till smooth functioning of AC plant/AHU etc and same will be recovered from contractor's dues.

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