MAINT AND REPAIR OF EXTNL E/S INSTLNS TRANSFORMERS, 2/4 POLE STRCTRE, VCBs, HT PANELS,HT/LT CABLE, HT GOD SWITCHES INCL PREV MAINT AND WK AT NAVAL STN PORBANDAR,FF/ALARM SYSTEM,EOT CRANES AND WKS AT NAE,INS SARDAR PATEL, NOFRA,NSB,MES COMPLEX AND COM

M&L for overhauling of compressor of capacity 40 TR of Make Voltas Model 05046S complete all as directed for improved performance and designed parameter as specified including the following at AC plant:- (a) Pumping down the compressor and transfer existing refrigerent gas, complete dismantling of each part of compressor and replacing the defective parts as found and reassembling the complete compressor, then oil charging, and doing pressure test using N2 gas as specified & hold for 24 Hrs to detect leakage and again same tests after repairing the leakage to ensure no leakage in the complete system, after that vaccuming the compressor to remove moisture & air complete all as specified & directed by Engr-in-Charge. Note :- 1) Refrigerant Gas, Oil and spare parts etc will be measured and paid separately under relevent item of Schedule

Supply & charging of compressor oil N68 Suitable for R-22 Refrigerant Compressor of Model Voltas compressor Model 05046S model including draing out old oil complete all as specified & directed by Engr-In-Charge Make :- Bharat Petroleum /Hindustan Petroleum

Supply and charging of Refrigerant Gas R 22 up to required pressure and quantity in AC plant Note:- Gas will be supplied in pack cylinder Complete in all respect all as specified & directed

Supply and fix in replacement HP cutout switches suitable for Voltas compressor Model 05046S including dismantling old unserviceable all as specified and directed by Engr-In-Charge. Make: Danfoss KP 1 /Indofoss.

Supply and fix in replacement LP cutout switches suitable for Voltas compressor Model 05046S including dismantling old unserviceable all as specified and directed by Engr-In-Charge. Make: Danfoss KP 1 /Indofoss or equivalnet it .

Supply and fix in replacement industrial type temperature gauge suitable for central AC plant of 40 TR capacity.

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.

M&L for detection of leakage using Nitrogen gas at AC Plant in Refrigerant Line , Evaporator Coil /colling coil using proper pressure test after completion of overhauling of compressor as per Sl item no 1 ,detecting the leakage as per standard procedure & attending the repair complete in all respect by bronze soldering stick with gas welding or any other suitable measure & Vaccuming the same after Nitrogen test all as specified and directed by Engr-In-Charge

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.

Material and Labour for dismantling of existing Air Handling Unit of any 2 x 40 TR capacity acrefully , cleaning, servicing, overhauling to all component of AHU, with and including cleaning of heating & cooling coil with caustic soda solution, including welding / brazing, wherever required to arrest leakages, cleaning of Pre-Micro Filters, replacing of vertical GI sheet supports, complete replacement of foam insulation of best quality using adhesive substance to avoid cold air leakages, fabrication of bottom GI tray of existing size with drain pane made out of 16 guage thick GI Sheets duly painted with bituminous paint over interior surface of tray, re-assembling all the dismantled components to its original position using new nut, bolt, washer and other packing material etc, with and including testing, commissioning of Air handling Unit at optimum efficiency, complete all as directed by Engineer -in-charge.