OUTSOURCING OF SERVICES FOR MAINTENANCE AND OPERATION INCLUDING ALLIED REPAIRS OF AC PLANT INSTALLED AT NAVAL AIR ENCLAVE (NAE) UNDER GE (I) NAVY PORBANDAR

Amount

Maintenance and operation of Central Type Air conditioning plant of capacity 2 X 40 TR including pumping set 5 HP -04 Nos, AHU 9000 CFM-02 Nos, cooling Tower-01 No, compressor and cooling coil 40 TR - 02 Nos by deploying skilled plant operator in three shift of 08 hours each round the clock (06:00 to 14:00, 14:00 to 22:00, 22:00 to 06:00) including sunday & holiday complete all as specified and directed by Engr-in-charge.

Pumping down the compressor and transfering existing refrigerent gas for overhauling of compressor reciprocating open type model VOLTAS Make 40 Ton Capacity, opening complete assembly & replacing minor unserviceable parts including machining of crank shaft, boring, polishing etc replacing gaskets, packing reassembly and recharging of pumped down refrigerant & topping up if required to maintain the required standing pressure, charging of compressor oil complete and testing for smooth functioning complete all as specified and directed. (Note : Major spare parts compressor oil and refrigerant for topping up will be paid separately under relevant items as supply only herein after minor consumeables and labour charges of major items specified herein after are demeed to be included in the quoted unit rate of this item).

Material and labour for cleaning of cooling coil section of AHU for descaling and providing 2 Nos. 15 mm Tee outlet for local circulation of mild acid solution in the cooling coil (separate container and pump set of appropriate capacity to be used for circulation) PH value of Zem solution to be kept at 4 & checked at an interval of 1hr. duration process the scalgum / WS / Cleansol or equivalent solution to be used for descaling if ph value remains less than '7' flush with fresh water added to sodium carbonate till ph value attains '7' reassembling the coil section in position after minor repairs to be carried out in AHU Coil bins to be cleaned by scalgum solution by spraying the solution with washing pump up to required level, AHU and complete all as specified and directed for AHU of 2 x 40TR Capacity AC Plant at Hanger 343 of NAE Porbandar.

Dismantling AHU of 2 x 40TR capacity AC plant carefully by removing side and top panel removing unserviceable blower shaft bearings,removing motor & blower assembly, replacement of new AHU blower shaft bearings reassembling blower assembly and refixing electric motor & top side panel in original position with new nut bolts washers & shafts keys & checking the shafts balancing & testing for smooth running all as specified and directed at Hanger 343 of NAE Porbandar.

Material and labour for disconnecting condenser for descaling & plugging them & providing of 15 mm tee out let for local circulation of mild acid solution in the condenser (separate container and small pump set to circulate diluted acid solution to be used) PH value of solution to be circulated & to be kept 4 and checking frequently i.e. every one hour during the operation Scalgun WS solution to be used for descaling purpose after 2 to 3 hours of cleaning if ph value remains less than 7 flush with fresh water mixed with sodium carbonate tubes and cleaning with nylon brush after closing the end covers, circulating diluted acid solution as specified above & PH value to be maintained as above & flushing the same with fresh water including recharging of stored refrigerant up to required pressure complete all as specified & directed by Engineer-in-Charge of for 2 x 40TR Capacity AC Plant at Hanger 343 of NAE POrbandar.

Pumping down the existing refrigerant from the condensor and carrying out the leak test of plant 2X40 TR with the pressure of Nitrogen gas and monoitoring for 24hrs asses leakages by brazing & replacement of necessary gasket wherever required including copper tubes of suitable size vacumizing of the plant by vaccum pump finally reharging of existing refrigerant gas to the plant and topping up of refrigerant if required to maintain the standard pressure etc complete including testing of the plant for smooth functioning complete all as specified & directed. (Note: Refrigerant required for topping up will be measured and paid separately under relevant items)

Material and labour for disconnecting for Chiller descaling & Plugging them & providing of 15 mm tee outlet for local circulation of mild acid solution in the Chiller (separate container and small pump set to circulate diluted acid solution to be used) PH value of solution to be circulated & to be kept 4 and checking frequently i.e. every one hour during the operation Scalgun WS solution to be used for descaling purpose after 2 to 3 hours of cleaning if ph value remains less than 7, flush with fresh water mixed with sodium carbonate tubes and cleaning with nylon brush after closing the end covers, circulating diluted acid solution as specified above & PH value to be maintained as above & flushing the same with fresh water including recharging of stored refrigerant up to required pressure complete all as specified & directed by Engineer-in-Charge of for 2 x 40TR Capacity AC Plant at Hanger 343 of NAE POrbandar.

Rewinding of unserviceable electric motor 3 phase 50 Hz 415volt of following capacity pump set complete comprises as under :- (a) Disconnecting & removing the electric motor from installed position including, loading, unloading and transporting to approved workshop. (b) Taking out the existing burnt winding from the motor including rewinding complete with super enameled copper winding wire of existing gauge including all insulating material such as insulation paper, sleeves, tape, varnish etc. complete for class 'F' insulation. (c) Transporting the motor back to the location, reinstalling in original position including alignment, electrical & water connection, commissioning and testing for 8hours continuously to check the RPM etc. to the satisfactory performance etc. complete. NOTE: Any damage caused during handling will be made good without any extra cost to department

(i) 5.0 HP Chiller Water Pump Motor .

(ii) 5.0 HP Condenser Water Pump Motor.

Over hauling of Monoblock pump set after removing from the base plate, disconnecting from pipe line, dismantling the pump set, replacing unserviceable gland packing, gun metal bush bearing water seal applying grease etc. complete and reassembling the pump set connecting with pipe line reconnection of electric supply, including buts bolts, gaskets etc. complete testing of pumps for smooth functioning with following capacity of pumps

(i) 5.0 HP Chiller Water Pump Motor .

(ii) 5.0 HP Condenser Water Pump Motor .

Supply and charge refrigerant gas (F-22) as per requirement. all as specified and directed by EIC.

Replacement of compressor oil with new compressor oil all as specified and directed by EIC

Material and labour for Expansion valve of 40TR chiller unit including taking down unserviceable valve complete all as specified and directed by Engineer-in-Charge.

Supply and fix Condensor safety valve suitable for chiller unit all as specified and directed by Engineer-in-Charge.

Material and labour for HP cut out KP - 1 including taking down old one.

Material and Labour for LP cut out KP - 1 including taking down old one.

Material and labour for oil pressure cut out controls for compressor including taking down old one.

Removing old unserviceable power contactor 32 Amps and supply & fix new power contactor all as specified & directed by Engineer-in-Charge.

Removing old unserviceable DOL starter and supply & fix new DOL Starter suitable for monoblock pump set of 50/60 TR AC Plant all as specified & directed

Repairs/Replacement of condensar fan motor with blade assembly complete suitable for AC plant

Taking down old unserviceable AHU Blower and Supply and fix new AHU Blower all as specified & directed

Taking down old unserviceable AHU Blower Drum and Supply and fix new AHU Blower Drum all as specified & directed

Taking down old unserviceable AHU Blower shaft and Supply and fix new AHU Blower shaft all as specified & directed

Removing the unserviceable pressure gauges HP / LP / OP from existing position and supplying and fixing new pressure gauge of capacity 0 to 30 Kg / square centimeter complete with necessary accessories all as specified & directed by Engineer-in-Charge

Removing the unserviceable water pressure gauges from water line & supplying and fixing new water meter up to pressure 0 to 7 Kg / square centimeter complete with all accessories all as specified and directed by Engineer-in-Charge

Material and labour for scraping cleaning and preparation of external surface and painting complete installation at 2 X 40 TR (80 TR capacity) including compressor motor piping cooling tower condenser AHU and panel Board etc with two coats of synthetic enamel paint over a coat of red oxide zinc chromate primer as per ENCs colour code as given including writing to SM & MES numbers complete all as per specified & as directed by Engineer-in-Charge. Location : CCDT

Supply and change V belt for compressor motor (B-61).

Supply and replacement of 'V' velt B-58 for compressor and AHU

Supply in replacement V belt B-120 for cooling tower motor

Material and labour for Detecting the gas leakage, rectifying the defects by vacumizing and charging fresh mafron gas and commissioning and testing the split type air conditioner unit 1.5 Ton capacity complete all as specified and directed.

Material and labour for Detecting the gas leakage, rectifying the defects by vacumizing and charging fresh mafron gas and commissioning and testing the split type air conditioner unit 2.0 Ton capacity complete all as specified and directed.

All as per item No 29.00 above but of Water cooler 60/80/120 Ltrs. Capacity.

Material and labour for taking out split type Air conditioner 1.0/1.5/2.0Ton capacity of any make from its original location, removing the dust from body with blower, cleaning the condenser and cooling coil by using water and caustic soda, painting the base tray with one coat of black enamel paint checking all the connections including functioning of metal clad socket/ DP switch function of relay capacitors overload protector thermostat fan motor blade fan blower drum etc. oiling/ greasing of fan motor checking serviceability and refixing it in its original place including testing commissioning for 1.0/1.5/2.0 Ton of AC of any make all as specified & directed by Engineer-in-Charge. Note : -Refrigerant gas will be measured & paid separately .

Material and labour for taking out split type Air conditioner 1.0/1.5/2.0Ton capacity of any make from its original location & shifting of AC from existing location to new location complete installation and testing including making good of old location all as specified and directed by Engineer-in-Charge.

Supply, install, test & commissioning new compressor sealed reciprocating type suitable for split type AC 1.5 Ton capacity duly charged with fresh Refrigerant gas etc. complete all as specified & directed by Engineer-in-Charge.

All as per item No 34.00 above but of 2.0 Ton capacity

All as per item No 34.00 above but of Water coolers 60/80/120 Liters capacity

Removing the existing unserviceable burnt fan motor from split type AC of capacity 1.5 / 2.0 Ton and replacing the same with brand new fan motor of same capacity including connecting up and testing complete.

Supply and fix fan motor suitable for water cooler of any capacity including removing old fan motor and testing complete.

Replacement of starting capacitor 60 - 80 mfd.

Replacement of starting capacitor 80-100 mfd.

Replacement of running capacitor 25 MFD

Replacement of running capacitor 36/45 MFD

Supply and fix in replacement of thermostat switch for split type AC of capacity 1.5 Ton / 2.0 Ton capacity

Supply fixing and clamping jointing copper tubing for suction line and for liquid discharge line duly insulated with suitable insulation material including making hole in wall for passing through and making good to the disturbed surface complete.

Supply and lay PVC pipe 20 mm dia heavy duty for drain out condensing water of split AC including cutting of floor / opening of hole in wall and making good after laying of pipe etc match the existing surface complete.

Taking out old unserviceable condenser coil of 1.5 Ton split type AC any make with sins cutting in let outlet connecting copper pipe and providing new condensor coil with sins and connecting inlet outlet copper pipe by bracing and replacement of nut bolts etc complete all as specified and directed by Engineer-in-Charge.

All as per item No 46.00 above but for 2.0 ton split type AC complete all as specified and directed by Engineer-in-Charge.

m/s prakash enterprise

K K Construction Co