81113 Repair Maint of AC plants of INS Utkrosh

Amount

M&L for servicing of package type indoor unit of following capacity by opening front grill, bottom grill cleaning filters, by spraying water jet, removing dust/dirt from package unit all over, checking electric connection, checking any leakage by applying soap solution on joint & liquid/vapour lines properly checking functionality of all spares & replacing the same under relevent item of schedule & put the air conditioner into operation complete all as specified and directed by Engr-in- charge/GE. Note : (i) Spare parts will be measured and paid separately. (ii) Sliding the filter out and washing it with water and drying in the shade, reinstalling the same. (iii) Checking the compressor for oil leakage and inspection of vibrations insulation rubber for wear and tightening the mounting lugs.

Air cooled Air-Conditioning Plant unit of capacity 5.5 TR .

Air Cooled Air-conditioning Plant unit of capacity 10 TR

Air cooled Air-conditioning Plant unit of capacity 16 TR

All as per item No- 1.00 above but ourdoor unit of AC plant of following capacities:-

Air cooled Air-Conditioning Plant unit of capacity 5.5 TR .

Air Cooled Air-conditioning Plant unit of capacity 10 TR

Air cooled Air-conditioning Plant unit of capacity 16 TR

Air cooled Air-conditioning Plant unit of capacity 8.5 TR

M&L for leak testing of Air-conditioning Plant/Package type AC Plant unit of comprising of condenser units, chiller units, indoor unit and outdoor unit with pressure testing the complete plant by dry nitrogen gas by separating high side and low side, brazing and low side, rectifying the leakage by gas welding, brazing, pressure testing, vaccumising gas, gas charging the system with existing Refrigerant gas, testing and commissioning complete all as specified and as directed by Engineer-in-charge of the following capacity of AC plant are as under:- Note :- (a) Refrigerant gas paid and measured separately. (b)The cost for the nitrogen gas shall be deemed to be included in the quoted rate.

AC Plant unit of capacity 36TR.

AC Plant unit of capacity 5.5TR.

AC Plant unit of capacity 8.5TR.

AC Plant unit of capacity 10TR.

AC Plant unit of capacity 16TR.

Dismantling the pump of following capacity, isolating suction / delivery line connections, checking the worn out parts like impeller, shaft, stuffing box, shaft sleeve using Micrometer and transporting to workshop for repairs, check for condition of bearings, removing scales from impeller and pump housing, building the worn out metal of transmission shaft to required level, machining to the required size on lathe machine, grinding and finishing to match the sleeve, and fixing into the housing, re-assembling, transport back to the installation, installing in position, check for alignment with dial gauge, inserting shims where necessary, refixing with coupling, tightening with torque wrench to required level, re-connecting the flanged pipe connections of suction/ delivery, greasing for bearings including replacement of rubber insertion etc complete all as specified and directed by the Engineer-in-Charge. Note :- Spares will be measured and paid separately under relevant schedule.

Pump of capacity ranging from 20 to 35 HP

Pump of capacity ranging from 5 to 10 HP

Supply only for carrying out repairs under item No. 4.01 above with the following items for incorporating of pumpset repair work for the of capacity 20 to 35 HP :-

Shaft bushes with check nuts (stainless steel) for above pumpset.

Ball bearings suitable for above pump.

Metal Coupling for above pumpset.

Gland packing end cover (Stainless steel of suitable grade) as per existing size

Supply only for carrying out repairs under item No. 4.02 above with the following items for incorporating of pumpset repair work for the of capacity 5 to 10 HP :-

Shaft bushes with check nuts (stainless steel) for above pumpset.

Ball bearings suitable for above pump.

Metal Coupling for above pumpset.

Gland packing end cover (Stainless steel of suitable grade) as per existing size

M & L for dismantling the defective induction motor of following capacity/make/class of insulation from foundation bed, disconnecting all electric supply connections, duly coupled with pump/compressor, transporting to workshop removing burnt out winding from stator/rotor, rewinding with suitable gauge of super enamelled copper wire of approved make and replacing DE /NDE bearings, insulation materials, varnishing , heating, greasing of bearings etc complete, re-assembling, testing and commissioning of following capacity motors all as directed. Note : Terminal block, Bearings of motor if required will be measured & paid separately under relevant schedule items.

Motor of capacity ranging from 20 to 30 HP.

Motor of capacity ranging from 5 to 10 HP.

Dismantling of motor of following capacity of pumpset from installed position after disconnecting the coupling and electric connections and transporting the motor to the work shop, strip opening of the motor complete including dismantling stator, rotor assembly and cleaning the complete assemblies by taking out perished glass sleeve of connecting leads from common termination to terminal block,and washing with carbon tetra chloride, decarbonising and cleaning the rotor with CTC solution.Replacing the glass sleeve of connecting leads from common termination to terminal block, binding the loose coils with binding cloth, varnishing the coils complete and applying bectol on the excitor coils, stator coils and heating complete, reassembling the unit and testing with megger for insualtion value and re-assembling, aligning with pump, re-inserting shims where necessary, refixing with coupling, tightening with torque wrench to required level, re-connecting the electric cable etc and check for drawing current testing, commissioning etc all as directed by Engineer-in-Charge.

Motor of capacity 35 HP

Motor of capacity 20 HP

Motor of capacity 10 HP

Motor of capacity 5 HP

M&L for replacement of rubber bush coupling for following capacities of pumpsets complete all as directed.

Pump of capacity ranging from 20 to 35 HP

Pump of capacity ranging from 5 to 10 HP

Supply only following bearings required during winding of motors all as directed

DE/NDE Bearing suitable for motor of capacity ranging from 20 to 35 HP. Make : SKF/NBC

DE/NDE Bearing suitable for motor of capacity ranging from 5 to 10 HP. Make : SKF/NBC

Supply only terminal block complete with hardware of following capacity motors

Servicing / cleaning the motor starter panel of size, control wiring of starter, replacing defective CTs/ meters /glands /indicator lamps, replacement of rusted doors with hinges/locking arrangements, tightening the cable end terminals with bus bar / connector links / MCCB / MCB/Contactor/Relay/Single phase preventor and timer end terminals with proper torque for avoiding loose connections, applying a coat of red oxide primer after preparation of rusted surfaces only and applying two coats of enamel paint of approved colour by Enginner in Charge, for the following capacity of pumps:-

Motor starter of capacity 35 HP.

Motor starter of capacity 20 HP.

Motor starter of capacity 10 HP.

Motor starter of capacity 5 HP.

M&L for preparation of old painted steel surfaces of located at various places of air conditioning plant and connected structure by means of scrapping and filling cavities, etc., and applying two coats of synthetic enamelled paint by means of spray painting and stickering SM/MES number complete all as specified and as directed.

AC Plant of capacity 3x36TR.

AC Plant of capacity 3x5.5TR.

AC Plant of capacity 3x10TR.

AC Plant of capacity 3x16TR.

AC Plant of capacity 3x8.5TR.

M&L for Servicing of Air Handling Units (AHU) by removing the filter, vacuumising the filter, washing the filter and reinstalling the cleaned filter, brush the cooling coil and spray the foam coil cleaner including rinsing of coil, alignment of shaft & Motor, servicing of chilled water line strainer for the AHUs, tightening of terminals of motor, replacement of V belts, replacement of bearings complete all as specified and as directed by Engineer-in-charge of the following capacity of AC plant are as under:- Note: The unit rate quoted shall deemed to include the cost of blowing out the dust, chemical cleaning by spraying the organic based scale removing agent (Vaniklin) at the appropriate ratio till removal of complete dust & scale deposits in the fin area of evaporator coil, flushing through for proper air flow across the coil, cleaning of expansion valve; greasing of blower motor, checking of electrical connection, cleaning of air filters,greasing of blower motor,replacement of unserviceable bearings, V belts, water drain lines, renewal of rusted sheet metal screws, applying synthetic enamel paint over a coat of primer on the rusted portion and testing & commissioning the unit all as specified and as directed by Engineer-in-Charge

AC Plant of AHU capacity approx 33000 CFM.

AC Plant of AHU capacity approx 7000 CFM.

Material and labour for carrying out servicing/overhauling , repairs and maintenance of Cooling tower of 72 TR water cooled chiller type Central AC plant by dismanlting /taking down the CT fan motor of flange mounted extended type shaft upto 5 HP, 3 phase, 415 volts, 50 Hz, along with fan assembly, and including cleaning & removeal of scales, inspection, cleaning and replacement of PVC fills, PVC eliminator, FRP louvers, motor cover, splash cups etc complete including renewal of all corroded bolts & nuts, terminal block, and re-assembling, fixing in position, fixing of fan blade, and alignment of the fan blade for the suitable air throw of the cooling tower,painting with two coats of synthetic enamel paint over a coat of anticorrosive paint after preparation of surfaces, testing & commissioning the cooling tower motor all as specified and as directed by the Engineer-in-Charge. Note:- (a) Spares such as PVC fills, Fan assembly, CT fan motor, elimintaor, louvers, motor cover, branch pipe, splash cups etc shall be measured and paid separately under relevant item. (b) The rates inclusive for all T&P, chemicals required for cleaning, FRP compound, nut bolts etc complete for keeping the Cooling tower in operational condition.

Supply only spares for carrying Cooling tower of 100 TR water cooled chiller type central AC plant under relevant items:-

PVC FILLS 600X300X150 MM.

CT fan assembly cast aluminium alloy 1500 mm.

CT fan electric motor of capacity 5HP/ 3.75 KW , minimum , insulation class F, IP55. Make: Oswal/ Kirloskar/CG/ABB.

Al sprinkler of 5" (125mm).

FRP motor cover.

PVC branch pipes 63 mm dia & 30 inches long.

M&L repair/servicing for overhauling of reciprocating/rotary compressor 36TR complete including taking down unserviceable parts and refixing new parts whererever necessary complete all as directed by Engr-in-Charge after the pumping down the complete system and collecting the refrigerant into condenser, compressor oil into clean container, disconnecting the compressor from suction & discharge side and including leak testing of compressor after reassembling the parts, recharging/filling retrived oil & gas, replacement of belt if required and testing upto satisfactory cooling performance complete all as specified and as directed. Make: Bock compressor. Note: (i) spare parts, refrigerant (gas) & compressor oil for top up if required shall be measured and paid for seperately as supply only in respective item of this schedule. (ii) Metal filling, grinding, polishing spring, washer, quarter, and consumable items such as grease cotton waste etc., are deemed to be included in the quoted rate. (iii) Belt shall be supplied and paid separately.

M&L for repair to suction & discharge valve of compressor 36 TR of capacity by means of replacing the teflon washer sheet, suction & discharge valve ring, spring, 'O' rings, gaskets etc complete and testing for proper holding of valve, leak testing etc all as specified and as directed. make: BOCK Compressor. Note: The unit rate quoted shall deemed to be include the cost of suction & discharge valve and shall be considered as one job.

M & L for descaling the shell & tube condenser of 36 TR capacity at by circulating the descaling chemical (scale gun) (HCL acid) through condenser by pressure feeding method after disconnecting condenser water lines, and opening the end covers of both side, brushing condenser water tubing, removing the scales, normalising the copper surface circulation normalising agent and refixing all dismantled parts including replacement of gasket set all as specified and directed by Engineer-in-charge.

Supply & fixing in replacement spare parts for repairs of compressor as under:-

Main bearing seal end

Main bearing pump end

Connecting rod assembly

C R Bearing

Cylinder sleeve

Piston

Oil Pressure release valve

Suction valve reed

Oil Filter Assembly

Piston Ring Set

Aluminium washer set

Gudgeon pin

Gudgeon pin bush

Discharge Valve Aseembly

Oil Pump Assembly

Rocker for unloading mechanism

Piston Circlip

O' ring set with teflon set

Liner unloading ring with spring and pin

Connecting rod nut and bolt

Retaining spring

Suction retaning plate

Safety valve

Gasket set complete

Discharge service valve

Suction service valve

Cylinder liner

Unload sleeve

S&F in repair, MCCBs in existing FP/panel, connecting to bus-bar with all connecting accessories and modification in busbar (if Necessary), connection complete and testing after completion, all as specified and directed, of following capacities:-

MCCB 400 Amps, 4 pole,36 kA,50Hz,Thermal magnetic release,lcs=100% lcu.

MCCB 250 Amps, 4 pole,36 kA,50Hz,Thermal magnetic release,lcs=100% lcu.

MCCB 125 Amps, 4 pole,25 kA,50Hz,Thermal magnetic release,lcs=100% lcu.

MCCB 100 Amps, 4 pole,16 KA,50Hz,Thermal magnetic release,lcs=100% lcu.

MCCB 63 Amps, 4 pole,16 KA,50Hz,Thermal magnetic release,lcs=100% lcu.

S&F in repair, MCBs in existing FP/panel with all connecting accessories and modification in busbar (if Necessary), connection complete and testing after completion, all as specified and directed, of following capacities:-

MCB TP 20 to 50A.

MCB SP 6-25A.

S&F in repair, 3-pole power contactors in existing control panel of AC Plant, connecting to bus-bar with all connecting accessories and modification in busbar (if Necessary), connection complete and testing after completion, all as specified and directed, of following capacities :-

Contactor AC-3 45A.

Contactor AC-3 25A.

Contactor AC-3 32A.

Contactor AC-3 18A.

Contactor AC-3 9A.

S&F in repair, thermal over load relays in existing motor control starter panel of AC Plant, connecting to contactor with all connecting accessories and connection complete and testing after completion, all as specified and directed, of following capacities:-

Thermal Over load relay range 20 Amps to 33 Amps of 80A MAX.

Thermal Over load relay range 14 Amps to 23 Amps of 63A MAX.

Thermal Over load relay range 9 Amps to 15 Amps of 50A MAX.

S&F as in repair, Digital soft starter for motor rating 53 Amps AC-1 duty, 79 Amps AC-3 duty, 415 volt, 50 Hz, three phase supply consisting of line contactor, by pass contactor, semiconductor fuses, microprocessor based with all protections/ SPD and connected control wire including following features in steel sheet enclosure of IP-43 rating suitable for motor pump of capacity upto 20 HP including taking out old unserviceable starter all as specified and as directed by Engineer-in-charge.

(a) Control Voltage from 94VAC to 484VAC. (b) Constant current. (c) XLR-8 Adaptive acceleration control for pumps. (d) Kickstart. (e) XLR-8 Adaptive deceleration control for pumps. (f) Forward / Reverse Jog/VFD. (g) Comprehensive motor protection. (h) Large LCD Keypad. (j) Auto Start / stop. (k) 2 motor data sets. (l) Fully programmable overload trip. (m) 5 digital inputs, 4 digital outputs. (n) analog output. (o) Built-in RTD & Thermistor inputs. (p) 99 event logs with time stamping. (q) Starter communication timeout. (r) Network communication trip (s) Auto detection of inline or inside. (t) delta power connection. (u) Programmable auto start/stop. (v) 24 VDC auxiliary power supply. (w) Power through operation allows to run soft starter even with one SCR shorted. (x) Emergency run operation current ratings are based on 300% starting current. (y) 10 starts per hour, 10 seconds starting time and ambient temperature of 45°C.

S&F as in repairs Direct on line(DOL) Star-Delta starter for motor rating AC-3 duty, 415 volt, 50 Hz, three phase supply suitable for 5 HP capacity pumpset including taking out old unserviceable starter all as specified and as directed by Engineer-in-charge.

Supply and charging refrigerant gas R134/R32/R407/R410A or equivalent existing gas as per OEM for gas charging for ACs/ water coolers/ refrigerators complete one time for topping up or making full qty as per the pressure requirement of plant and /testing for any leakage and rectifying the same as directed by Engineer in Charge and testing on full load condition for 8 Hrs period. Make: Mafron/ Freon/ Floron. Note :- (i) Empty cylinder shall be returned to contractor. (ii) Payment shall be made for net weight of gas and necessary receipt voucher shall be submitted on this effect.

S&F as in repair/replacement of the following spares suitable for AC plants of capacity 5/8.5/10/16/36 TR AC plant of make :- Carrier/Bluestar/Voltas complete all as specified and directed.

Pressure gauge of HP size 4" dia of rating 0 - 300 PSI.

Water pressure gauge of 4 " dia of range 0 - 7 Kg /sqcm or 0 - 100 PSI.

Pressure gauge of LP OP (low pressure /oil pressure) size 4" dia of rating -30 to 150 PSI.

HP cut out Type MP - 5 suitable for R - 22 gas.

LP/HP combination cut out MP - 15 Suitable for R 22 gas.

Safety shut off valve GBC 42S of size 1-5/8".

Compressor oil suitable for 36TR.

6/10 mfd capacitor suitable for cooling fan motor.

20 mfd capacitor suitable for cooling fan motor.

Condensor fan motor including blade1/5 HP.

Condensor fan motor including blade 3/4 HP.

Micro computer control with PCB complete for package AC unit 5 to 16 TR.

Air cooled condensor out door type with tank and copper tube for discharge line unit assembly including contactor capacitor suitable for capacity 5/5.5/8.5 TR.

Timer 800SD compressor motor starter.

Single phase preventor.

Stainless steel fan guard grill for Condenser fan suitable for out door unit of capacity upto 16 TR.

Butterfly valve of size 100mm bore.

Non-return valve of size 100mm bore.

Drier core

Expansion Valve.

Solenoid control valve.

S&F as in repairs pre filter of AHU having 90% down to 10 micron as per existing any size including taking down uniserviceable complete all as specified and as directed.

M&L for dismantling old unserviceable compressor & supply, installation, testing & commissioning of scroll compressor all as per existing make and type 3 ph 415 V 50 Hz of capacity not less than 5.5/5 TR & connecting suction, discharge line by jointing with copper rod & oxygen flame and making electric connections & wiring with microprocessor control panel & sensor complete all as specified and directed. Note: (i) The cost of any other sensing/protective device Eqpt required to make the plant functional related to compressor shall be included in quoted rates. (ii) The cost of hiring of technician from the OEM of compressor for installation & commissioning shall be included in quoted rate.

All as per item No 30.00 above but outdoor unit of package unit of capacity 8.5 TR.

M&L for earthing complete with galvanized steel earth plate electrode 600 mm x 600 mm x 6.0 mm thick buried directly in ground vertically to a depth not less than 2.25 meter deep below ground level with top edge earth plate at a depth not less than 1.5M below normal ground level connected to galvanized iron strip 25 X 4 mm (upto 7.5 metres) by means of bolts, nuts check nuts and washers of galvanized steel and connected to main switch board or main control board as directed and including provision of concrete pit in PCC (1:3:6) type C1, pre-cast RCC (1:2:4) type B1 cover slab 45 cm x 45 cm x 5 cm reinforced with 8 mm dia. TMT bars @ 150 mm centre to centre both ways, with one handle for lifting made out of 8 mm dia MS bar, provision of funnel, wire mesh, 20 mm bore galvanized steel tubing (Medium grade) for watering, charcoal or coke and salt in alternate layers, 40 mm bore galvanized steel tubing medium grade for protection of earth lead connection, necessary excavation and earth work in any type of soil and including necessary testing and dismantling of existing unsv earthing complete all as shown in Figure 15A of IS 3043 :1987, complete all as specified and directed.

Supply and fixing in replacement of indoor Thermometer with Digital Hygrometer and Humidity gauge., The hygrometer shall be able to measures Humidity and temperature, records level to display highs and lows, magnatic backing for convinient placement and able to display temprature in both Celsius and Farenheit all as specified and directed. Make-Acu Rite 00325 or equivalent as approved by GE.

Supply and fixing in replacement of Psychrometer shall be able to measure -20C to 50C Humidity and temprature, hanging on wall type all as specified and directed by Engr-in-Charge.

Dismantling old U/s duct and Supply , assembly and erection of GI sheet with TDF flange rectangular/square duct made out of 'L' shaped hollow profile, duly factory boxed, incl all accessories such as Corner, Cleat, Carriage bolt, Gasket and appropriate sealant on longitudinal joints etc complete of size as following as under:-

22 Gauge

24 Gauge

Dismantling old U/s duct and M&L for duct insulation 40mm thickness with resin bonded fibre glass wool roll of density 24 kg/Cum, with factory laminated aluminium vapour barrier, thickness of insulation as specified and including the following:- (a) M&L for cleaning the duct 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 duct joints are sealed against any leakage. (b) M&L for applying rubber based adhesive CPRX compound. (c) M&L for sealing of all longitudinal joints and circular overlaps with and including Aluminium foil tape 50 mm wide, to make the insulation leakproof. (d) M & L for securing the insulation with and including mechanically fastened nylon/steel straps of size 12 mm/50 mm at maximum intervals of 1.2 mtr.

Supply and lay M S Pipes heavy grade with all fittings laid in floors or fixed to walls and ceilings etc of sizes as shown including dismantling old unserviceable pipes.

100mm bore

80mm bore

M & L for Insulation of M S Pipe with nitrile insulation of 25 mm thick final finished with 26 G aluminium cladding complete of sizes as shown including dismanlting old worn out cladding.

100mm bore

80mm bore

Note for Item No 1 to 38: The MCCBs shall be thermal adjustable type with ICs=100%ICu and all the spares of AC plant considered shall be as per OEM approved suitable all as per existing. It is responsibility of contractor to engage required manpower as per requirement and take necessary measures to run the plant in event of breakdown to the satisfaction of user and as directed by Eng- in-charge .Considering the sensitive nature of installation the contractor shall always be in a position to make alternate standby arrangement in case of break down. Contractor shall keep his spares ready in advance for carrying out repairs without any delay. Any breakdown/complaint shall be attended within 2 Hrs and defects shall be rectified within 24 Hrs of time otherwise a recovery of Rs 5000/Hr due to non-functional of AC plant shall be attributed to Contractor without any further claim. The cost for same is deemed to be included in scope of item. The repairs to be carried out by experienced/authorized service engineer/mechanic and the credentials for the same to be submitted for approval of GE before commencement of work.

Tropical Refrigeration (BID ID -3079802)

M/s Karbhagam Sales Agency (BID ID -3078301)