REPAIR AND MAINTENANCE OF CENTRAL AC PLANTS AND MAINTENANCE OF CENTRAL PACKAGE TYPE AC PLANT AT GTRE AND CERATIN ALLIED REPAIRS UNDER GEIRDEAST BANGALORE

Amount

Material and labour for Periodical maintenance of package AC plants of any capacity like checking for proper electrical connection, checking/tightening of V belt, checking refrigerant pipe line, arresting refrigerant gas leakage if any, checking of proper functioning of electrical control panel, checking/cleaning of pre filter (twice in a month), cleaning of out door unit with soap solution and routine checking to ensure smooth running of package AC plants complete all as specified and as directed:- Note: Replacement of unserviceable spare parts will be measured and paid separately. (a) 2 X10 TR Package type (High mass Bldg) (b) 3 X5 TR Package type (Cell -03) (c) 3 X10 TR Package type ( Caliberation Lab) (d) 2 X8.5TR Package type ( Material Group) (e) 2 X15 TR Package type ( Auditorium) (f) 2 X10 TR Package type (98 Building) (g) 2 X10 TR Package type ( Welding Shop)

M & L for preventive/routine maintenance of pumps sets, motors and chilled water lines of central chiller type A/C Plant of capacity 300 TR Details of plants for maintenance (a) 10 HP chiller pumps - 4 Nos (b) 10 HP condensor water line pumps - 4 Nos Make of the plant : Carrier Note: Rate quoted by the contractor for maintenance includes routine checking of any water leakage, arresting/rectifying leakages, replacement of gland packing/ greasing of bearings, checking loose connections in motor terminals.etc all as specified and directed.

M & L for preventive/routine maintenance of AHU’s,cooling towers of central chiller type A/C plant of capacity 300 TR Details of plants for maintenance (a) AHU’s - 4 Nos (b) Cooling towers - 4 Nos Make of the plant : Carrier Note: Rate quoted by the contractor for maintenance includes routine cleaning of cooling towers with Soap solutions for removing of algae and water scaling, cleaning of AHU filters, AHU rooms, checking for proper functioning of cooling tower motors, sprinkler assembly, supply air/return air ducts and replacement of unserviceable bearings as per requirement all as specified and directed.

M & L for preventive/routine maintenance of central chiller AC plant of capacity 300 TR for checking compressors 3 nos in 100TR each Details of plants for maintenance (a) 100 TR capacity compressors - 4 Nos Make of the plant : Carrier Note: Rate quoted by the contractor for maintenance includes routine checking for gas leakages, arresting leakages, checking for proper funtioning of HP/LP/OP cut outs, solenoid valves, controls, electrical panels etc Spares required for repair/replacement will be measured and paid separately.

Preventive maintenance for ductabe package type AC plants of following capacity consisting of regular inspection and checking of all electrical control panels, refrigerant gas leak testing, inspection/checking/cleaning of distributions duct systems, checking and cleaning of all electrical motors,belts and fan blades, proper alignment, replacement of unserviceable refrigerant pipe line insulation including rectification of any faults as occurred/replacement of minor parts as required. Cleaning of cooling coil with Alkaline Based cleaner (non-Acid Based) at 2 x 8.5 TR with 1 x 8.5 TR standby at Super computer Bldg No 10 Note: 1.The unit rate quoted shall be inclusive for the following for one month :- (a) Spare parts required to be replaced will be measured and paid separately. (b) The maintenance of plants to be carried out at least once in a month and register to be maintained with users/concerned JE's signature and the same to be produced to Engr-in-Charge every month

Material and labour for Evacuating of refrigerant gas from the plant into the empty cylinder for up to 120 TR capacity central AC plants, leak testing of the plant with nitrogen (N2) pressure by separating the entire system like low side, high side compressor condensers and rectifying the leakage vacummising re-charging of evacuated refrigerant gas and testing complete all as directed. Note: Topping up of gas will be measured and paid separately.

Material and labour for descaling of condensing unit up to 100 TR capacity of air-conditioning plants by circulating descaling agent through the condensers by forced feed method after removing of the end covers of the condensers, cleaning of each tube of condensers thoroughly by the brushing and refixing the end covers of the condensers, replacement of old/unserviceable rubber gasket, bolts, nuts & washers, cleaning of spray nozzles, cup, water line strainer and testing spray nozzles for proper functioning on working pressure complete all as specified and as directed.

Material and labour for cleaning of FRP cooling tower of round/bottle/square type of up to 100TR capacity by opening the top cover of cooling tower, removing the spare pipe and nozzles properly without any damage to clean the same, cleaning the PVC fills and cooling tower base through circulating caustic soda mixed with water solution for half-an-hour and drain out the dirty water, cleaning the entire cooling tower with wire brush including replacement of old/unserviceable worn out gaskets, bolts, nuts & washers including testing and commissioning for proper functioning complete all as specified and as directed.

Material and labour for disconnecting compressor of 20 TR Model ACCEL SMC 6-65 from the system for maintenance/ servicing after closing by suitable dummy plates on suction and discharge valves and opening the compressor & removing of all internal parts, cleaning of the all parts thoroughly, polishing of crank shaft, piston pin including replacement of thrust washers, spring washers and nut bolts etc, and re- fixing back all parts, refixing the compressor in the system and removing of the dummy plates, leak testing of the compressor, testing and commissioning of the compressor all as directed. Make: ACCELSMC 6-65 installed at Engr Works Services Notes: Compressor oil and spare parts required to be replaced will be measured and paid separately.

Material and labour for disconnecting compressor of 16/15 TR Model ACCEL SMC 4-65/ BHATLIBOI from the system for maintenance/ servicing after closing by suitable dummy plates on suction and discharge valves and opening the compressor & removing of all internal parts, cleaning of the all parts thoroughly, polishing of crank shaft, piston pin including replacement of thrust washers, spring washers and nut bolts etc, and re-fixing back all parts, refixing the compressor in the system and removing of the dummy plates, leak testing of the compressor, testing and commissioning of the compressor all as directed. Make: ACCELSMC 4-65 installed at 7A-7B Bldg and BATLIBOI Make at IC Lab Notes: Compressor oil and spare parts required to be replaced will be measured and paid separately.

Supply only for the unserviceable following spare parts as per item No 9 &10 suitable for ACCEL compressor of 20/1510 TR capacity and model of ACCEL SMC 6-65/ACCEL SMC 4-65/ and BHATLIBOI Make of the spare parts should be Accel/BHATLIBOI.

(a) Main bearing front and rear end

(b) Cylinder liner

(c ) Connecting rod

(d) Discharge valve assembly

(e) Piston assembly

(f) Oil pump gear wheel with bush

(g) Rocker arm frame

(h) Oil filter

(j) Suction strainer

(k) Gasket Set

(l) Crank shaft

(m) SV Reed

(n) CR Bearing

(o) Aluminium Washer Set

(p) CR Nut & Bolt

(q) O Ring set

(r ) S V spring

Material and labour for dismantling and taking out the existing unserviceable compressor induction motor after disconnecting the electric connection and in let/out lets, transporting to workshop, removing the burnt out winding from slots, cleaning the rotor slots with CTC and emery paper and rewinding the motor with as per existing size of new supper enameled copper winding wire and insulating by using class ‘B’ insulation keeping for drying, bring back to site, reassemble the motor, transporting back to site and fixing in position, connecting electric connections and in let/outs including testing and commissioning for its satisfactory performance including taking down old unserviceable copper winding complete all as specified and as directed for the following capacities :-

(a) 25 HP capacity of SIEMENS/ABB make installed at Engr Works Services

(b) 20 HP capacity of Crompton/ABB make installed at IC Lab & 7A-7B Bldg at GTRE

Material and labour for disconnecting and removing the condensing pump set from the central AC plant installations transporting to workshop for repairing after opening up pump set and replacing of unserviceable ball bearings, including cleaning, oiling, greasing of internal parts, replacement of worn out nut, bolts, washers and gland packing etc, transporting back to site, reassembling in the central AC plant including testing and commissioning complete for proper functioning complete all as specified all as directed for the following capacities :-

(a) 10HP capacity

(b) 7.5 HP capacity

(c ) 5 HP capacity

Material and labour for dismantling and taking out the existing unserviceable blower motor after disconnecting the electric connection, transporting to workshop, removing the burnt out winding from slots, cleaning the rotor slots with CTC and emery paper and rewinding the motor with as per existing size of new supper enameled copper winding wire and insulating by using class ‘B’ insulation keeping for drying, bring back to site, reassemble the motor, transporting back to site and fixing in position, connecting electric connections including testing and commissioning for its satisfactory performance including taking down old unserviceable copper winding complete all as specified and as directed for the following capacities :-

(a) 15 HP capacity

(b) 10 HP capacity

(c ) 5 HP/3 HP capacity

Material and labour for dismantling and taking out the existing unserviceable CT Fan motor after disconnecting the electric connection, transporting to workshop, removing the burnt out winding from slots, cleaning the rotor slots with CTC and emery paper and rewinding the motor with as per existing size of new supper enameled copper winding wire and insulating by using class ‘B’ insulation keeping for drying, bring back to site, reassemble the motor, transporting back to site and fixing in position, connecting electric connections including testing and commissioning for its satisfactory performance including taking down old unserviceable copper winding complete all as specified and as directed for the following capacities :-

(b) 3 HP capacity

(c ) 1.5 HP/1HP capacity

Supply and fix the following HP/LP & pressure cutouts including dismantling of unserviceable cutouts of any type complete all as specified and as directed.

(a) HP/LP Cutouts

(b) Oil pressure cutouts

Supply and fixing of V-belt for AC plants of the following sizes including removing of old/unserviceable V belt all as specified and as directed.

(a) V Belt of size Up to B-95

(b) V Belt of size above B-95 to B-120

Supply and fix Phase Failure Relay (Single phase preventer) Auto Reset, 40 Volts. Unbalance, 1 CO Contact Make : MINILEC/MINITEC/BEC

Supply and fix Phase Failure Relay (Single phase preventer) Auto / Make : MINILEC/MINITEC/BEC Manual / Remote Reset Adj. Unbalance, 2 CO Contact

Material and labour for replacement of unserviceable AC power contactor of following capacity from the control panel in AC plants including reconnecting/testing complete all as specified and as directed.

(a) AC power contactor upto 16 Amps capacity 440 volts, 50 Hz, 3 phase Make: Siemens / Legrand / L&T

(b) AC power contactor up to 32 Amps capacity 440 volts, 50 Hz, 3 phase Make: Siemens / Legrand / L&T

(c ) AC power contactor up to 63 Amps capacity 440 volts, 50 Hz, 3 phase Make: Siemens / Legrand / L&T

Supply and fixing of Bimetal overload relay of the following capacity for central AC plants including taking out old/unserviceable relay of any type/capacity complete all as specified and as directed. Make: L&T /Siemens /BCH.

(a) Bimetal over load relay upto 16 Amps capacity

(b) Bimetal over load relay over 16 amps upto 32 Amps capacity

(c ) Bimetal over load relay over 32 amps upto 63 Amps capacity.

Supply and fix PVC fills suitable for following capacity cooling tower including removing unserviceable fills complete all as specified and as directed

(a) 100 TR capacity

(b) 40 TR capacity

Supply and fixing of shaft seal assembly of ACCEL compressor of any capacity including removing of the unserviceable shaft seal assembly and testing & commissioning complete all as specified and as directed.

Supply and weld ball valve of size model DN-25 made out from carbon steel with stainless steel ball with teflon sheeting including necessary modification of existing pipe line to fix new ball valve etc including taking out old/unserviceable ball valve of any make complete all as specified and as directed

Supply and weld ball valve of size model DN-40/50 made out from carbon steel with stainless steel ball with teflon sheeting including necessary modification of existing pipe line to fix new ball valve etc including taking out old/unserviceable ball valve of any make complete all as specified and as directed

Supply and charging of compressor oil servo friz F 68 after draining out old/unserviceable compressor oil complete all as specified and as directed. Make of oil : INDIAN OIL or equivalent in BPCL/HPCL

Supply and fix New scroll compressor of 4.25 TR capacity suitable for 8.5 TR capacity ductable split unit and making necessary brazing & testing commissioning etc including taking out existing unserviceable compressor complete all as specified and as directed Make: EMERSON/DANFOSS

Supply and fix cooling tower sprinkler with spin suitable for up to 100 TR capacities cooling tower including removing of unserviceable sprinkler complete all as specified and as directed

Supply and Charge refrigerant gas R-22.

Supply and Charge refrigerant gas R-134A

Supply and fix pressure relief valve (safety valve) suitable for ACCEL make compressor of following SMS 65/100 series compressor including taking down unserviceable pressure relief valve complete all as specified and as directed. Make:ACCEL

Supply and fix thermostatic expansion valve suitable for upto 40 TR capacity of compressor, including removing of unserviceable thermostatic expansion valve complete all as specified and as directed.

Supply and fix water pressure gauge 0 - 8 kg and 4" dia suitable for condenser / Chiller water line including removing of old/unserviceable pressure gauge complete all as specified and as directed.

Supply and fix suction/ discharge/oil pressure gauge of 0-150/ 130 PSI equivalent in Kg/ Cu cm for central type AC plant including removing of old unserviceable pressure gauge complete all as specified and as directed. Make: GURU / FEIBIG / ADARSHA / KI

Supply and topping up of compressor oil suitable for carrier make screw Chiller (SW 220 grade Synthetic Screw Compressor Oil)

Materail and labour for cleaning of AHU cooling coil/condenser of 10 to 20TRcapacity by taking out pre filter frame, cleaning of cooling coil, cleaning of AHU dampers, cleaning of drain tray and line, Blower and motor bearing greasing and re-commissioning the unit all as directed by Engineer - in - Charge

Supply and Fixing of dual core internal oil filter suitable for 100 TR capacity chiller unit of carrier/Climaveneta

Supply and Fixing of external oil filter suitable for 100 TR capacity chiller unit of carrier/Climaveneta

Supply and Fixing of drier suitable for 100 TR capacity chiller unit of carrier/Climaveneta

Supply and Fixing of Oil level switch suitable for 100 TR capacity chiller unit of carrier/Climaveneta

S&F in Replacement of HP transducer suitable for 100 TR capacity chiller unit of carrier/Climaveneta.

S&F in Replacement of LP transducer suitable for 100 TR capacity chiller unit of carrier/Climaveneta

S&F in Replacement of Oil pressure transducer suitable for 100 TR capacity chiller unit of carrier/Climaveneta

S&F in Replacement of Temperature Sensor suitable for 100 TR capacity chiller unit of carrier/Climaveneta

Dismantling of existing screw compressor of 100TR capacity carefully with using hydraulic jack & chain pulley, putting dummy plates to suction & discharge line & transporting to authorized workshop for repair, etc., all as directed.

Dismantling of burnt out winding from stator of screw compressor of chiller of 100 TR capacity compressor body, cutting, opening of burnt out winding, rewinding with same gauge of copper conductor of F class oil proof insulation applying one coat of varnish and kept at electrical oven and heated for 48 hours and refixing the same in original place and all as directed.

Complete Overhauling of one Compressor in 100 TR chiller unit by opening the compressor end plate, removing the gear assembly with gear puller, removing the hydraulic chamber, removing the twin screws using puller, removing the bearing sets, O rings, rotor, terminal bolts and stator. Clean the entire mechanical parts with approved cleaning agent and oil the parts. Checks all the mechanical parts for wear & tear and replace if required. Reassemble the dismantled parts carefully by using required tools and tackles. Refix the twin screws and checks the alignment of screws for smooth operation. Refix the stator along with terminals, fix the gear assembly and hydraulic chamber. Checks the alignment of screws and gear assembly for smooth rotation. Refix the endplates and tightened the bolts and complete the overhauling all as per standard procedure.

Supply and replacement of internal bearings suitable for 100 TR carrier screw compressor by opening the compressor end plate, removing the gear assembly with gear puller, removing the hydraulic chamber, removing the twin screws using puller, removing the bearing sets, O rings, rotor, terminal bolts and stator. Clean the entire mechanical parts with approved cleaning agent. Replace the bearing sets as per standard procedure. Reassemble the dismantled parts carefully by using required tools and tackles. Refix the twin screws and checks the alignment of screws for smooth operation. Refix the stator along with terminals, fix the gear assembly and hydraulic chamber. Checks the alignment of screws and gear assembly for smooth rotation. Refix the endplates and tightened the bolts all as per standard procedure.

Replacement of defective contactor for the condenser fan motor suitable for Climaveneta Chiller

Replacement of defective bearings of the condenser fan motor.

Dismantling of winding from defective condenser fan motor and rewinding, with the same gauge of copper conductor and kept at electrical oven and heated for 48 hours, as required., all as specified and as directed.

Replacement of defective contactor with new contactor 160 A, 3 Pole . (Make: Siemens 3TF51)

Replacement of defective contactor with new contactor 100 A, 3 Pole . (Make: Siemens 3TF48)

Replacement of defective contactor up to 32 A, with new contactor. (Make: L&T,Siemens, ABB)

Replacement of defective EXV board of Carrier/Climaneneta make screw chiller by Isolation the power to the Chiller unit, Remove the connections to the EXV board carefully, remove the EXV board from the chiller control panel, Fix the new EXV board carefully and reconnect the connections to the EXV board complete all as per standard procedure.

Replacement of defective Flow Sensor of Carrier/Climaveneta make screw chiller by Isolating the Butterfly valve, Remove the electrical conection carefully, remove the Flow sensor from the chilled water pipe line, Fix the new flow sensor carefully and reconnect the electrical connections to the flow sensor complete all as per standard procedure.

Replacement of Indoor wall mount single compartment type AHU control panel for New Assembly Hanger fabricated out of 2 mm thick MS sheet powder coated and pre coated primer comprising of (1) MCCB 63 Amps 4 pole with adjustable thermal & adjustable magnetic setting, over load, short circuit - 1 No for In coming, (2) Digital Multi Function Meter with CT - 01 set, LED Indicator lamp yellow , Red , blue - 01 Set, Complete Internal wiring with copper conductor wires - 1 Lot, (3) MCB 32 Amps 4 pole - 2 Nos for AHU and Humidifier, (4) DOL starter suitable for 3 phase 3.7 KW motor with auto/manual option - 1 No for AHU, (5) Necessery PLC, SPPR, OLR, Temperature and RH sensor for smooth running of AHU all as per standard. Make : CPRI approved.

Replacement of defective 40mm dia 3 way mixing valve with actuator, matching flanges, gaskets, GI bolts, nuts and insulating the disturbed area with 50 mm thk PUF pipe sections and clading with 26 swg Aluminium sheet from New Assembly Hanger AHU chilled water pipe. Make: Johnson Controls, Seimens, Anergy, Belimo

Replacement of defective 32mm dia 3 way mixing valve with actuator, matching flanges, gaskets, GI bolts, nuts and insulating the disturbed area with 50 mm thk PUF pipe sections and clading with 26 swg Aluminium sheet from New Assembly Hanger AHU hot water pipe. Make: Johnson Controls, Seimens, Anergy, Belimo

General servicing and preventive maintenance of the 100 KW capacity hot water generator. Cleaning the generator tank usig non acid based descaling agent, checking the operations of all safety devices, cleaning of electrical contacts, checking the electric circuits all as directed.

Supply and replacement of defective heater from the hot water generator with new heater make: Rapid Cool

Supply and replacement of defective safety thermostate from the hot water generator with new thermostate

Supply and fixing of auto air vent with ball valve

Supply and fix catchall filter of suitable size for 8.5 TR capacity ductable/package AC plant including removing of U/S catchall filter etc.Make: Sporlan /Danfoss/Synergy.

Supply and fix thermostatic expansion valve suitable for upto 40 TR capacity of compressor, including removing of unserviceable thermostatic expansion valve complete all as specified and as directed.

Material and labour for dismantling and taking out the existing unserviceable CT Fan motor after disconnecting the electric connection and with out disturbing all connections and replacement of CF Fan motor following capacity and fixing in position, connecting electric connections including testing and commissioning for its satisfactory performance complete all as specified and as directed for the following capacities :-

(a) 1 HP capacity

(b) 2 HP capacity

Supply and fixing MCCB with thermal magnetic release 415 volts 3 pole 250 Amps capacity and breaking capacity 36 KA including necessary fixing/connectioning in DBs complete all as specified and as directed Make of MCCB : Legrand Cat No 4202 39/ABB/L&T/GE Power

Supply and fixing MCCB with thermal magnetic release 415 volts 3 pole 100Amps capacity and breaking capacity 25 KA including necessary fixing/connectioning in DBs complete all as specified and as directed Make of MCCB : Legrand Cat No 4200 46/ABB/L&T/GE Power

Supply and fixing MCCB with thermal magnetic release 415 volts 3 pole 63Amps capacity and breaking capacity 16KA including necessary fixing/connectioning in DBs complete all as specified and as directed Make of MCCB : Legrand Cat No 4200 46/ABB/L&T/GE Power

Supply & Fix in replacement of MCB TP 63 Amps 415 Volts 3 phase all as specified complete including dismantling the old one

Material and Labour for complete servicing after pumping down Indoor/outdoor units of split AC complete by cleaning condenser/ Evaporator coil with air blower, wet servicing of condenser coil unit with caustic soda etc, replacement of sheet metal screws wherever necessary applying oil in fan motor bushes checking and rectifying the wiring defects, proper setting of thermostat & other electrical/ Refrigerent controls, cleaning the air filter, duly painted with one coat of red oxide to the inner side and two coat of spray painting to the outer side of the outdoor unit after remove the out door unit, connecting up all connections and testing after gas charging if required all as directed for Split type Air Conditioner up to 2 TR . Notes :- (i) The rate deemed includes for minor spares (ii) Gas shall be measured and paid separately under relevant item.

All as per item No 71 but tower AC 3 TR Capacity.

Supply and fix in replacement of new hermetically sealed compressor for 1.5 TR capacity split type AC including removing of unserviceable sealed compressor unit etc complete all as specified and directed

All as per item No- 73 above but of 2 TR

Removing defective unserviceable fan blades from window/split type air-conditioners up to 3 T capacity and supply and fix new blade suitable for air-conditioners all as specified and as directed.

Disconnecting and taking down unserviceable overload relay from window/split type air-conditioner up to 2 TR capacity includign supply and fix new overload relay, testing and commissioning for satisfactory performance complete all as directed.

Disconnecting and taking down unserviceable thermostat from window /split type air-conditioner up to 2 TR capacity, supply and fix new thermostat, testing and commissioning the same for satisfactory performance complete all as specified and directed.

Disconnecting and taking down unserviceable starting capacitor from window/split type air-conditioner up to 3 TR capacity and supply and fix new starting capacitor 80/100 mfd. suitable for the AC and testing the same for satisfactory performance all as specified and as directed.

Supply and fix New scroll compressor of 2.25 TR capacity suitable for 5.5 TR capacity Package AC unit and R-22 refrigerent, making necessary brazing & testing commissioning etc including taking out existing unserviceable compressor complete all as specified and as directed

Supply and fix New scroll compressor of 5 TR capacity suitable for 10 TR capacity Package AC unit and R-22 refrigerent, making necessary brazing & testing commissioning etc including taking out existing unserviceable compressor complete all as specified and as directed

B5BUILDING SOLUTIONS

Sreekrupa Enterprises

devan enterprises

ANAND REFRIGERATION

M AND V ENTERPRISES

Neptune Engineers and Builders

M/S J J ENTERPRISES