REPAIR / MAINTENANCE OF CERTAIN AIR CONDITIONING PLANTS INCLUDING REFRIGERANT GAS AT 25ED AF STATION DEOLALI

Amount

Comprehensive maintenance of water cooled Chillar water Central air conditioning plant of capacity 100 TR (capacity as per plant Working + 1x 50 TR Stanby) Make-Voltas, comprising of following equipment mentioned below complete all as specified and directed by Engineer-in-Charge a) Chillar unit Make-Voltas = 03 Sets Compressor suitable for 2 X 50 TR , Make- Danfoss = 03 Sets b) Condensar Unit Make Voltas = 03 Sets c) Chillar water pump set back pull out type monoblock, capacity as per plant d) Condenser water pump set back pull out type monoblock capacity as per plant . e) AHU servicing by replacing unserviceable/ worn out parts of the machine cleaning of Cooling Coil unit, all filters Checking/Repairs to Electrical panels ,sensor unit for proper functioning and testing and checking where required complete all as directed. Spares for items should be measured and paid under relevent items .(f) Cooling tower round shape induced draft type water flow rate direct driven propelar fan motor of capas per plant, g) Electrical control panel cubical type with multi funtion display unit, MCBs, Fuse,MPD with auxilary contactor h) Motor control centre cum APFC Electrical LT panel cubical type floor mounted with MCCB,MPCB,Push botton , Flash pattern voltmeter, Ammeter, ,SFU with ROH, APFC relay with contactor ,multi function meter etc. complete j) LT panel for PAC unit, cubical type floor mounted with MCCB, MCB, Push botton , Flash pattern voltmeter, Ammeter,contractor , etc. k) Control devices such as thermostatic expansion valve,solenoid valve and cooling thermostatic & humidity contorl switch l) Chilled water/ Condenser/cooling tower MS/GI piping up to 125mm dia with valves pressure gauge temperature gauge complete- 01Set a) Central Type AC. Plant (Chilled Water Systems ) of capcity 100 TR ( 2 x 50 TR working & 1x 50 TR S/By AT Bldg. P 19 & 20

All as per item No 1 above but for Central Type AC. Plant (Chilled Water Systems) of capcity 100 TR ( 2 x 50 TR working & 1x 50 TR S/ByAT Bldg. 216 & 217

All as per item No 1 above but for Central Type AC. Plant (Chilled Water Systems)of capcity 100 TR ( 2 x 50 TR working & 1x 50 TR S/By at Bldg No P 6

All as per item No 1 above but for Central Type AC. Plant (Chilled Water Systems) 100 TR ( 2 x 50 TR working & 1x 50 TR S/By at Bldg No P 218

All as per item No 1 above but for Central Type AC. Plant (Chilled Water Systems) 75 TR ( 2 x 37.5 TR working & 1x 37.5 TR S/By at Bldg No P 14 Add new Note for item No 1 to 5 : Contractor will provide periodical inspection report duly signed by AC qualified and trained Rep : (a) Complete maintenance and Inspection by responsible qualified and trained staff in order to keep all the euipment inservisible condition to achieve desired parameter inside the air conditional space. (b) To carry out the periodical maitenace of AC plant if necessary for effective functioning. (c) The contractor shall be responsible for proper functioning of all electrical/mechanical equipment and maintain the same in sound condition to avoid the accident and breakdown. (d) Routine checks necessary for satisfactory running the above plant and cooling tower complete all as diected by Engineer-in-charge. (e) Topping up of gas in case of leakage,compressor oil refill,descaling,repair to compressor, Condensor, motor,pump electrical panel,water supply valves,leakage,leaking refrigerant valves etc. (f) To attend the breakdown during day and night including holiday and putting the plant in working condition in shortest possible time and including suffiecient stock of spares avilable always to insure smooth and regular functioning of AC plant .The employee shall required to keep their own T&P to attend the fault/break down in quick succession also contractor require to provide PVC insulation tape roll /Teflon tape roll,rubber gasket & safety equipments etc. (g) Major Spares parts & Gas etc shall be measured & paid under respective item. (h) Spares for items should be measured and paid under relevent items

S & F in replacment of Unserviceble Differntial water pressure switch as suitbale Complete all as directed by Enggener- In- Charge.

S& F in replacment of Unserviceble lower pressure switch (LP Swith) as suitable Complete all as directed by Engineer- In- Charge.

S& F in replacment of Unserviceble water pressure gauge 4"dia of range 0 to 150 PSI Make - Febig as sutibale at site Complet all as directed by Engineer- In- Charge.

M&L in replacement of wornout Crankcase Heater of Compressor Make- Danffos SM 185 Complete all as directed by Enggener- In- Charge.

M&L in replacement of unserviseble Control cut out online of central type AC plant and testing Complete all as directed by Engineer- In- Charge.

S&F in repair High Pressure Cut Out sutable as per sample complete all as directed.

S&F in repair Low Pressure Cut Out sutable as per sample complete all as directed.

Supply only Nitrogen gas at required perssure for leak testing of central A/C Plant complete all as directed by engineer-In- Charge .

Supply Fix in replacement of safety valve suitable for consenser unit as per site requirement complete all as directed.

Supply Only Refregrant Gas R 407c complete all as directed by engineer-In- Charge .

Supply Fix in replacement of universal/Strainer filter cum dryier suitable for Chilled Water Plant as per site requirement complete all as directed.

M& L in replacment of old unservicable Pressure relifl valve. 0 to 300 Psi Sutable as per sample complete all as directed.

M&L for replacment of catchall filters for Liquid line, working pressure 500 PSI Suitable for R 407 C Gas including arragement for installation of filter if required ( Make:- Sporlon or Equivalent

M&L for disconnecting electrical connections of motor located at the top of cooling tower, keep cables at safe custody for reconnection and dismantling and taking out fan blade assembly along with motor mounted on base frame at the top of cooling tower after cutting/dismentaling all nuts, bolts and fixtures from the mounting frame and removing whole assembly including motor and base frame from the top of cooling tower with the help of T&P for servicing of cooling tower suitable for 100 TR capcity including following complete :- (i) Cleaning / scrapping of inner & outer surface of FRP basin, repair of damaged portion if any incuding FRP lining of all surfaces joints to avoid leakage including replacement of all nuts and bolts joining all parts of Basin complete. (ii) Servicing cooling tower through cleaning re-agent complete pipe line, including servicing of cooling tower motor and fan and make the necessary alignment with motor. (iii) Replacement of bearing if any of suitable cap if any after necessory work including greasing and replacement of nut bolts and preventing leakage if any by means of suitable adetives etc all as directed and specified. (iv) Taking out PVC fills blocks, cleaning and refixing as per existing location and channel direction. (v) Servicing of spray header and sprinkler assy complete. (vi) Repair of water strainer complete.

M&L for replacment of PVC frills (small size) in colums of size 60 x 15 x 15 cm or next higher size as per existing specification and requirement complete all as directed.

M & L in repair Ball / Roller bearing for Sprinlkler top and bottom Hub for 100 TR Capacity complete all as directed.

Repairs to AHU complete by opening up the side covers taking out the insulation material by scraping out cleaning the entire portion removing all dust, chemical cleaning of cooling coils and treating internal side by applying two coats of black bituminous anticorrosive paint, Insulating again internal portion with 12mm thick thermocoal sheet pasted properly with adhesive and checking & setting control panels,interlocks & setting of panel, for AC Plant including welding works with welding material replacing old nut bolts etc complete all as specified & directed. (a) Replacement of Blower bearing -02 Nos (b) Realignment/Straightening of blower Shafts-02 job

Material and labour for air balancing of AHU of capacities 20000 cfm each, including arresting leakages at ducting and balacing air flow through various air diffuser located in various rooms of block 1 , block 2, block 3 building complete all as specified & directed.

M&L Disconnecting the electrical and mechanical connection and Taking Out Condenser/Chiller Pump and transporting to workshop for Complete overhauling and Repair PumpSet of Capacity 5 HP Repair includes Cleaning, Oiling, Greasing and Replacement of other worn out/unsv parts of pump and complete painting of pump by two coats of synthetic enamel paint and reassembling and installation of pump at site & testing to the satisfaction of Engineer in charge. Notes : (i) repalcement and supply of spares like bearing and sleeve,repair to impeller etc will be measured and paid separetly under respective items.

All as per item here-in-above but PumpSet of Capacity 7.5 HP

All as per item here-in-above but PumpSet of Capacity 10 HP

Supply only Shaft Sleeve of 5 HP Pump set

Supply only gun metal impeller of 5 HP pumpset

Supply only Impeller Keys of 5 HP pumpset

Supply only Shaft sleeve of 7.5 HP pumpset

Supply only gun metal impeller of 7.5 HP pumpset

Supply only Impeller Keys of 7.5 HP pumpset

Supply only Shaft sleeve of 10 HP pumpset

Supply only gun metal Impeller of 10 HP pumpset

Supply only Impeller Keys of 10 HP pumpset

Supply only Terminal plate for 10 HP Pump

Supply only Terminal plate for 7.5 HP Pump

Supply only Terminal plate for 5 HP Pump

Supply only Shaft Bearing for 10 Hp Pump

Supply only Shaft Bearing for 7.5 Hp Pump

Supply only Shaft Bearing for 5 Hp Pump

Repair to Rotor Shaft, Rotor Key for 10 HP

Repair to Rotor Shaft, Rotor Key for 7.5 HP

Repair to Rotor Shaft, Rotor Key for 5 HP

Supply only Oil Seal for 10 HP

Supply only Oil Seal for 7.5 HP

Supply only Oil Seal for 5 HP

Supply only Water Seal for 10 HP

Supply only Water Seal for 7.5 HP

Supply only Water Seal for 5 HP

Material and labour Repair to motor End Cover and bearing housing repair,

Disconnecting the electrical and mechanical connection of burnt electrical motors from the existing site / location, transporting to and return back from work shop. Rewinding of electrical motors by dismantling and removing the burnt copper winding wire, cleaning the slots of stator with petrol and brushes, winding polyster based super enamelled copper wire of same gauge of original one with proper class of insulation including varnishing and heating the coil and remove air bubbles complete stator / roter after rewinding reassembling all parts including re-installing connection to original position and testing on full load all as directed by Engineer -in -charge for different capacity of motor as per following :- of capacity 10 HP (Chiller Pump set )

All as per item here-in above but of capacity 7.5 HP ( Condenser Pump Set)

All as per item here-in above but of capacity 5 HP (Condenser / Chiller Pump set)

All as per item here-in above but of capacity 5 HP (CT Fan Motor)

Supply and fixing in Repairs of Cast iron Butterfly Valve with maching double flanges ,gasket, necessary hardware complete all as specified and all as directed for the following size :- 65mm bore

All as per item here-in above but of 80mm bore

All as per item here-in above but of 100mm bore

S& F in repair of Gun-metal, globe or gate valves,15 mm bore with iron wheel head, screwed both ends for iron pipe and fixed globe valve cast copper alloy to match with the existing of following size including cutting welding/brazing required if any all as required at site .

All as per item here-in above but of 25 mm bore

All as per item here-in above but of 40 mm bore

Servicing & Periodical Maintenance of Precesion type Air conditioner of Capacity 2.65 TR wall mounted,Make GEA. installed in bldg. No. 19 & 20, (Servicing of Total 24 PAC Unit will be measured as one job) Cleaning of Cooling Coil unit, all filters and complete overhualing to Electrical panels ,sensor unit for proper functioning and testing complete all as directed by engineer-in charge. (Note: for item no 62 and 63 Contractor shall submit Monthly general servicing report duly signed by the contractors rep, Concerned JE & Engr-in-charge. For not carrying general servicing a penalty of twice the quoted rate will be recovered from the contractor.) Major items for repair shall be paid under relevant items of this schedule)

Servicing & Periodical Maintenance of Precesion type Air conditioner of capacity 3.5 TR Floor mounted,Make GEA. installed in bldg. No. 216 & 217, (Servicing of Total 16 PAC Unit will be measured as one job) Cleaning of Cooling Coil unit, all filters and complete overhualing to Electrical panels ,sensor unit for proper functioning and testing complete all as directed by engineer-in charge.

S&F in repairs of Thermal Expansion Valve Make - Sporlon / Danfoss or equivalent suitable for 50 TR Chilled water Central type AC plant system all as per sample, including brazing at both ends all as required and directed.

Supply, installation, testing & commissioning in repairs of water cooled scroll type compressor 13 TR of semihermatically sealed scroll motor with internal overload protector, compressor mounted on existing base including connecting with existing refrigerant pipe line, integral refrirant piping and wiring accessories all as required by Engr-in -Charge, Note :Old unservicable compressor will be deposited to MES E/M store.

M&L for decorbonising of contol panel of AC plant wiring,including all internal area of panel with vacume cleaner with out damaging existing control wiring if any damage / found fault during the decorbonising Note All cleaning materail supplied by the contractor

M&L for Painting of air conditioning plant with equipments,pump set,water suction /discharge / liquid piping of any specification with enamel paint of approved quality after prepration of surface including fitments e.g., condenser , chillar,valves etc as per colour code of Cental air cinditioning plants including writing MES / SM No complete all as directed.

S&Fin Replacement of Wet & Dry bulb thermometer of A/C plant room.

S&F in repairs Single Phase Preventor in electric panel board of central type AC plants all as per direction of Eng-in-charge.

S&F in repairs pilot solenoid valve assembly for central type AC plant as per sample complete all as directed.

Supply only electronic auto sensor unit complete all as specifies and directed.

S&F in repairs 3 pole power contactor, coil voltage 230/415 Volts MNX 12

S&F in repairs 3 pole power contactor, coil voltage 230/415 Volts MNX 18

S&F ADDON Block .2NO+2NC,AC.

Supply and fixing bimetal over load RELAY MN2 9-15A

Supply and fixing bimetal over load RELAY MN2 14- 23A

Supply and Fix CTS 10 Connector for Panel

Supply and Fix MVPD make - Softhard Type MPD range 5-30 A Aux supply 15 VAC for Panel

Supply and Fix MVPD make- Softhard Type MPD range 5-70 A Aux supply 230 VAC for Panel

Supply and fixing in repairs electronic timer type ST 100, 240 volts 50 HZ suitable for base mounting and DIN mounting complete all as dircted. Make : L&T.

S& F in repair MCCB 125 amp, 16 KA ,3 Pole,415 V, AC complete all as directed.

S& F in repair MCCB 100 amp, 16 KA ,3 Pole,415 V, AC complete all as directed.

S& F in repair MCCB 63 amp, 16 KA ,3 Pole,415 V, AC complete all as directed.

S& F in repair MPCB range 9-14 amp, AC complete all as directed.

S& F in repair MPCB Range 14-23 amp, AC complete all as directed.

S& F in repair MCB DP 25 amp, 10 KA ,230 V, AC complete all as directed.

S& F in repair MCB DP40 amp, 10 KA ,230 V, AC complete all as directed.

Supply Fix in Repair Digital Volt Meter 0 to 500 volt complete all as directed

Supply Fix in Repair Digital Ammeter 0 to 400 A complete all as directed

Taking out unserviceble PAC Unit Floor / Wall Mounted Type 2.6 TR Model (TU005CG) Make GEA installed in building no P 19-20 and Disconnecting the electrical and mechanical connection transporting to and return back from work shop Complete overhauling and repair of PAC Unit of capacity 2.6 TR Cleaning, Oiling, greasing and replacement of other worn out/unsv parts of PAC Unit if required Repair Replacement of the Following Parts - Cost of same should be included in the quoted Rate 1) VMR -6 Voltage Controller 2) Fuse Assembly and Fuse 3) MCB as per exisitng Sample 4) Blower overhualing 5) Filter 6) Repair /Replacement of Heater assembly Re-ssembling of PAC Unit and Re-installing PAC unit and Connection to original position and testing on full load all as directed by Engineer -in -charge

Taking out unserviceble PAC Unit Floor / Wall Mounted Type 3.5 TR Model MUO11C Make GEA installed in building no P 216-217 and Disconnecting the electrical and mechanical connection transporting to and return back from work shop Complete overhauling and repair of PAC Unit of capacity 3.5 TR Cleaning, Oiling, greasing and replacement of other worn out/unsv parts of PAC Unit if required Repair Replacement of the Following Parts - Cost of same should be included in the quoted Rate 1) VMR -6 Voltage Controller 2) Fuse Assembly and Fuse 3) MCB as per exisitng Sample 4) Repair/Replacement of Blower - 2 nos 5) Filter 6) Repair/Replacement of Blower Motor 7) Repair/Replacement of Heater assembly Re-assembling of PAC Unit and Re-installing PAC unit and Connection to original position and testing on full load all as directed by Engineer -in -charge

Supply and Fix Blower with Motor of PAC unit wall mounted 2.6 TR Model (TU005CG) in Bldg P 19-20 Model:- ebmpapst R4E355-AG02-05-230v-50Hz ( Made In Germany) complete testing to the complete saisfaction of Engineer-In-Charge

Taking out unserviceable circuit board and supply and fix New Electronic Circuit board (PCB) for Presion A.C. unit GEA.Make 2.65 TR And 3.25 TR capacity suitable for make- GEA. or equivalent connecting to existing system complete all as directed.

Supply & Fix in Replacement of Power transformer 240/24 volt AC,6.67 A. as per sample Suitabile for PAC's Make GEA Completed all as directed

Supply & fix in repairs balancing valves for Chilled water line 32 mm dia.

Supply & fix in repairs balancing valves for Chilled water line 25 mm dia.

Supply & fix in repairs balancing valves for Chilled water line 80 mm dia.

Supply & fix in Repairs 3 way motorised modulating valves suitable for Precision air conditioning unit (PAC) 25 mm dia.

Supply & fix in Repairs 3 way motorised modulating valves suitable for Precision air conditioning unit (PAC) 32 mm dia.

S& F in replacment of Float valve (brass) 25MM complete all as directed.

Supply & Fix in replacment of HRC Fuse 63 AMP Fuselink HF 63A Cylindrical complete all as directed.

Supply & Fix in replacment of Indication Lamp R-Y-B Set complete all as directed.

Supply & Fix in replacment of Push Button in Red/Blue/Yellow complete all as directed.

Taking out Unservicable damaged insulation from chilled water pipe and M&L for chilled water pipe insulation half section PUF shall be bonded to the Surface of pipe with adhesive and binded with metal binding wire. This lnsulation should be covered with fibre glass clothing and finally be finished with zylon base weather proof coating with two coats of AC ducting E 96 (Fevicol Make) as under:- (a) M&L for cleaning the pipe surface (to be insulated) by scrapping carefully with wire brush etc. to make the surface completely free of millscale, dirt, dust, grease and other foreign materials, taking special care so that all Pipe joints are sealed against any leakage. (b) The adhesive shall be used for bonding the seams securely together including butt & logitudinal joints, fittings and coverings must be closed with adhesive. (c) The adhesive shall be specially formulated fot the pipe insulation applicationand supplied by the insulatin manufacturer and have excellent bonding to porousand non porous surfaces. Pipe Size of 32 mm Dia.

All As per Item here in above but of 40 mm Dia

All As per Item here in above but of 50mm Dia

All As per Item here in above but of 65mm Dia

All As per Item here in above but of 80mm Dia

All As per Item here in above but of 100mm dia.

All As per Item here in above but of 125 mm Dia

Disconnecting the electrical and mechanical connection of burnt electrical motors of blower of PAC unit from the existing site / location, transporting to and return back from work shop. Rewinding of electrical motors by dismantling and removing the burnt copper winding wire, cleaning the slots of stator with petrol and brushes, winding polyster based super enamelled copper wire of same gauge of original one with proper class of insulation including varnishing and heating the coil and remove air bubbles complete stator / roter after rewinding reassembling all parts including re-installing connection to original position and testing on full load all as directed by Engineer -in -charge.

S&F in repairs tempreture sensor of PAC unit/ AC Plant complete wall/floor mounted type complete all as per directed.

S&F in repairs humidity sensor of PAC unit/AC Plant complete all as per directed.

M& L for replacement of existing worn out MS AC duct with made out of 5 mm thick MS sheet and necessary required welding, bend to shape, cutting and fixing with nut bolt and washer and providing necessary wire mesh for prevent to rats in the duct including painting with 2 coats of synthetic enamel paint over a coat of redoxide primer complet all as directed..

Supply and fixing in repair cooling tower fan blade set as per site requirment all as specified and directed by Engr - in - Charge.

M&L for leak repairing & gas charging of central type Air conditioning Plant as below:- a) Repairs in refrigeration systems leak of any by "O" Ring and Gland Packing ,services Valves / Oil seal b) Charging dry Nitrogen & holding pressure for 24 hours. c) Vacuum with double stage Vacume pump of (-) 2Kg/cm2 vaccum pressure .d) Charging R 407, Including top up the Compressor Oil and charging the gas at various Plant all as specified and directed by Eng- in- charge. ( At Central AC Plant Located at P 19-20 and P 216-217 , Block 1 AC Plant , Block 2 AC Plant, , Clock 3 AC Plant) Note:- Refregarant gas R 407 and Nitrogen gas compressor Oil will be measured and paid separately under revelent Item.

M&L for De-scaling the Shell and tube type condensser by circulating de- scaling chemical through for 4/ 6 hours Opening the end cover of condenser and cleaning inner tube manually with the help of nylon / wire brush until complete scale to be removed and flush out with fresh water. Reassembling the end cover including replacment of gasket, nuts bolts ,washer etc. as required and testing complete all as directed by Eng.- in Charge.

Labour only for attending complaint at water cooled chillar water central air conditioning plant of capacity 100 TR ( 2 x 50 TR Working + 1x 50 TR Stanby for each plant ) at tyre shed bldg No P-19, P-20 P-216 , P- 217 and Block 1 ,2 & 3 .and find out the any type of fault & rectify the same camplaint on the same day all as specified and directed by Engr in charge . Note : 1 ) Contractor will responible to provide testing material and he also responsible to provide minor spare parts 2) Contractor will provide skilled electrician / AC Mechanic for testing and rectify the fault.

Supply and Laying in repairs MS pipe of size 125 mm heavy grade with MS flanged all fittings laid in floor or fixed to wall or at any height at top of AC Plant complete including with providing a scaffolding on top as prevention to human safety complete as all directed .

Supply and fixing of storage water tank of capacity 10000 ltrs on stagging including inlet and out let pipe line connection all as specififed and drected by Engr in Charge . Make Sintex or equivalent

Supply and fix sprinkler assembly of cooling tower of capacity including taking down of existing and setting plant operational within 24 hours of breakdown material to be bought to match with the existing site and approved by GE, Complete all as specified and as directed by Enginner-in-charge.

Supply & fixing in replacement of box type, fine filter for AHU's made out of HDPE, non woven synthetic media duly washable and assembled in fully sealed anodised aluminium/GI frame, having efficiency 95% down to 10 micron of following sizes:- frame of size 600 x 600 x 50, 550 x 550 x 50 & 500 x 500 x 50mm

All as per item here-in-before but frame of size 600x300x50

Supply only V belt of Make Fenner/Everest of size B/8 as approved.

Supply and fixing in replacement of 'V' belt for AHU blower motor of size B-72

All as per item here-in-before but of size B-73

All as per item here-in-before but of size B-78

All as per item here-in-before but of size B-83

All as per item here-in-before but of size B-84

All as per item here-in-before but of size B-92

All as per item here-in-before but of size B-96

All as per item here-in-before but of size B-97

All as per item here-in-before but of size B-98

All as per item here-in-before but of size B-96

All as per item here-in-before but of size B-96

All as per item here-in-before but of size B-105

All as per item here-in-before but of size B-104

All as per item here-in-before but of size B-146

All as per item here-in-before but of size A-31

Supply only Copper Tubing 2 mm thick and 10 mm dia (3/8")for additional length required for in process of maintenance, complete all as specified & as directed.

All as per item here-in-before but of size 12 mm dia (1/2")

All as per item here-in-before but of size 6 mm dia (1/4")

All as per item here-in-before but of size 16 mm dia (5/8")

M & L in replacement of polypropylene spray nozzle to be fitted in water distribution system of cooling tower complete all as specified and as directed.

Supply and charging compressor Oil - Make -Servo or Equivalvent approved make including flushing/cleaning of oil chamber etc complete all as specified and directed by Engr-in-Charge

United Enterprises

Shree Sai Samarth Enterprises