Repair/maintenance of Central AC Plants at A area at Military Station Kanasar

Amount

M&L for comprehensive maintenance, periodical inspection, servicing / calibration of 07 Nos Air conditioning plants having 2X55 TR Air cooled chiller (01 Working and 01 stand by) installed at Kanasar Mil Stn, by OEM service professional and calibration of all the sensor, gauges connected to the system, checking of refrigerant gas pressure, capillary tube, coils as per AC plant, for smooth and efficient functioning, complete all as specified and as directed. Note :- Contractor shall submit the serviceability report.

M&L for maintenance, periodical inspection, servicing / repairs of AHUs of capacity 55 TR, 10000 CFM including replacement of all pre fine filter (micro filter) Qty 20 & fresh air filters Qty 20 rectangular shape as per installed on site, lathe / filing work for proper alignment of pulley / shaft, greasing to all moving parts complete all as specified and as directed.

M&L for identification of leakage location of refrigerant gas, repairing the copper tube / condenser valves by brazing, doing vaccum and pressure testing by nitrogen gas and Supply and charging of refrigerant R134a including transportation of accessories complete all as specified and as directed.

Supply and fixing in replacement (micro computer control) microprocessor based PLC power supply card / compressor card with RAM (control system with mother board) including display with suitable cord installed in 55 TR chiller unit of make Blue star model XAC2YS-060 having 3 Nos scroll compressor for controlling temperature, compressor cut off/on, sensor input-output interface, solenoid valve & expansion valve controller as per installed on site complete all as specified and as directed.

Supply and fixing in replacement microprocessor based PLC power supply card / compressor card with RAM (control system with mother board) including display with suitable cord installed in 80 TR chiller unit having screw compressor of make Carrier model 30HXY100A for commanding compressor, valves, controlling temperature, compressor cut off/on, sensor input-output interface, solenoid valve & expansion valve controller as per installed on site complete all as specified and as directed.

Supply and fix in replacement Expansion valve card (EXV) with display and manual / auto operation function installed in 80 TR chiller unit having screw compressor of make Carrier model 30HXY100A as per installed on site complete all as specified and as directed.

Supply and fix in replacement Electronic type Expansion valve installed in 80 TR chiller unit having screw compressor of make Carrier model 30HXY100A as per installed on site and as directed.

Supply and fix in replacement thermal Expansion valve with capillary tube of capacity 30 TR, 104 KW for R407 refrigerant gas installed in 55 TR chiller unit as per installed on site and as directed.

Supply and fix in replacement thermal Expansion valve with capillary tube of capacity 18 TR, 63 KW for R407 refrigerant gas installed in 55 TR chiller unit as per installed on site and as directed.

Supply and fix in replacement two way solenoid valve along with operating coil as per installed in 55 TR chiller unit all as directed.

Supply and fix in replacement water temperature sensor immersion probes & thermoelectric type compatible with electronic control motherboard of central AC plant of capacity 55 TR as per existing installed on site complete all specified and as directed.

Supply and fix in replacement duct humidity & temperature sensor electric type compatible with (BMS) Building Management System as per existing installed on site complete all specified and directed by Engineer-in-Charge. Make :- Sauter / Siemens or equivalent as approved by GE.

Supply and fix in replacement water temperature sensor thermoelectric type compatible with (BMS) Building Management System as per existing installed on site complete all specified and directed by Engineer-in-Charge. Make :- Sauter / Siemens or equivalent as approved by GE.

Supply and fix in replacement High Pressure and Low Pressure transducer with thermoelectric sensor and operating switch as per installed in 55 TR chiller unit all as directed.

Supply and fixing in replacement water flow switch & sensor suitable for more than 1000 LPM flow rate along with sensor (water/ liquid flow switch) for 55 TR AC Plant complete all as directed.

M&L for taking down pump & motor of capacity 7.5 HP to 10 HP, demolition of existing PCC foundation and making new PCC foundation of size 1.5m x 0.6m x 100 mm thick in PCC 1:2:4 Type B1 using 20mm graded crushed stone aggregate, along with grouting of new MS bolts of suitable size and fixing new chassis for pump & motor complete all as specified and as directed. Note :- Chassis made of MS iron will be measured and paid for separately.

M&L for mild steel frame work of angle iron, channels, etc for mounting of pump & motor, made of C / U / L section MS iron of required size and shape including necessary cutting, bending, welding, etc, with and including painting to all steel surfaces with two coats of synthetic enamel paint of approved tint over a coat of red oxide zinc chrome primer complete all as specified and as directed including dismantling and taking down old frame work. Notes :- (i) Size, section and shape of steel sections shall be as directed. (ii) Weight of paint & primer shall not be considered for payment purpose and quoted rate shall deemed to be included this aspect.

M&L for overhauling and rewinding of 80 TR screw compressor from authorised service station including the following works :- (a) Disconnection of defective compressor from base including removing the suction valve, discharge valve / liquid injection line, oil valve, refrigerant piping. (b) Defective compressor - loading / unloading from base to ground and lifting/ shifting/ loading of compressor in vehicle and transportation from site to authorised workshop for repair. (c) The repair includes the rewinding of compressor motor with super quality copper conductor of suitable size, replacing all type of bearings, seals, bushes shafts. (d) After repairing of compressor - collection of compressor, transport to original installed on site. (e) Fixing of compressor on base, fixing of suction valve, discharge valve, NRV, liquid line injection valve, vapor injection valve oil & refrigerant piping connection installation & testing complete all as specified and as directed.

M&L for following works :- (a) Pressure testing, leakage testing in all system and rectification of leakage, if any. (b) Dismantling and removing of chiller, both side end, and MS pipe line and again taking the leak test of the chillers tubes after fixing the cork and repairing of leak tube through dead plug. (c) Taking the hydraulic test of the chiller and taking the leak test after replacing Qty 10 copper tube 10 feet long, 15 mm dia, 16 gauge thickness all as directed and specified by Engineer-in-Charge. (d) Cleaning / flushing the chillers shell with CTC chemical, cleaning/flushing the condenser shell with CTC chemical, flushing the system of suction, discharge, liquid line, oil separator tank, NRV by using nitrogen and CTC chemical. (e) Vaccumising / dehydration of the system upto 10 days with cold trap/ice/salt complete. (f) Pressure testing in the system, taking/ rectifying the leaks and holding the pressure including of nitrogen gas cylinder, vaccumising the system and holding of 24 Hrs, break the vaccum with R-134 and revaccum the system. (g) Servicing of electrical panel, compressor, contactor, checked and set right, control wiring/inter locking, safety controls complete. (h) Filling the refrigerant gas with R134a upto suitable pressure and testing the chiller to the entire satisfaction of GE. Note :- Refrigerant gas R134a shall be measured and paid for separately.

M&L for taking down / disconnecting of motor of capacity 2 HP to 3 HP by removing all electrical connection from panel/ starter/ foundation and coupling, transport from site to workshop and back after repairing including all required material such as bearings, terminals, rewinding with super enameled copper wire of existing gauge, varnishing etc, re-installing the same and testing including painting and writing of MES /SM No complete all as specified and as directed.

M&L for taking down / disconnecting of motor of capacity 7.5 HP to 10 HP by removing all electrical connection from panel/ starter/ foundation and coupling, transport from site to workshop and back after repairing including all required material such as bearings, terminals, rewinding with super enameled copper wire of existing gauge, varnishing etc, re-installing the same and testing including painting and writing of MES /SM No complete all as specified and as directed.

Dismantling and strip opening of unserviceable centrifugal pump set of capacity 7.5 HP to 10 HP, segregating of serviceable/ unserviceable parts, cleaning of serviceable parts, making necessary modification/ lathe work for converting seal packing into gland packing, replacing old seal cap by new Cast Iron gland cap, assembling of pump carefully including replacement of worn-out parts grinding and polishing of shaft for fixing of bushes necking bushes nut and bolts etc. Making proper size of keys for fixing of impeller etc, getting coupled to the pump with motor, testing for rated discharge of water including transportation to the site for installing complete all as specified and as directed. Notes :- (i) Spare parts shall be measured and paid for separately as “Supply only” under relevant items of this Schedule. (ii) The rate quoted shall include the minor extras. In case of any dispute between contractor & GE regarding this aspect, the decision of Accepting Officer shall be final & binding. (iii) Spare parts for repair shall be procured from manufacturer’s authorised dealer only. (iv) All tools, testing instruments shall be arranged by the contractor including necessary transport. (v) The fixing/labour element for spare parts catered here-in-after as “Supply only” shall be deemed to be included in the quoted rate of this item.

Supply only following spare parts for centrifugal pump set 7.5 HP to 10 HP required to be replaced under item No 22.00 here-in-before :-

Ball bearing. Make : SKF/NBC

Gun metal bush.

Neck ring for impeller.

Gun metal impeller with key.

Pump motor rubber coupling tyre with nuts and bolts.

Supply and fixing in replacement Power contactor 3 Pole, AC3, 415 Volts, 65 Amps, model No 3TS47 of make Siemens or equivalent in makes mentioned in Appendix ‘B’ here-in-after as per existing specification complete all as specified and as directed.

Supply and fixing in replacement Power contactor 3 Pole NO/NC type of capacity 18 Amps as per existing specification complete all as specified and as directed.

Supply and fixing in replacement Power contactor 3 Pole NO/NC type of capacity 25 Amps as per existing specification complete all as specified and as directed.

Supply and fixing in replacement Power contactor 3 Pole NO/NC type of capacity 32 Amps as per existing specification complete all as specified and as directed.

Supply and fixing in replacement auxiliary Power contactor 3 Pole NO/ NC type to be mounted on power contactor of capacity 18/ 25/ 32 Amps as per existing specification complete all as specified and as directed.

Supply and fixing in replacement semi automatic Star Delta starter upto 20 HP adjustable type, 415V, 50HZ, 3 Phase alongwith single phase preventer and thermal overload relay all as directed and as specified.

Supply and fixing insulation to AC GI sheet duct with the help of insulating foam of thickness 15mm thick and fixing expended metal of suitable size, cut to length bent to shape required and tying with and including annealed mild steel wire not less than 0.9mm dia over insulation foam and rendering 15mm thick in CM (1:4) on wire mesh finished even & smooth without using extra cement and painting to match the similar location complete all as specified and as directed.

Supply and fixing in replacement universal flex joint (rubber bellow) sphere shape having flange ends for connecting pipe of size 80 mm dia by flange complete all as specified and as directed.

Supply and fixing in replacement universal flex joint (rubber bellow) sphere shape having flange ends for connecting pipe of size 40 mm dia by flange complete all as specified and as directed.

Supply and fix in replacement V shape fan belt of size B45 complete all as specified and as directed. Make :- Fenner or equivalent as approved by GE.

Supply and fix in replacement V shape fan belt of size B93 complete all as specified and as directed. Make :- Fenner or equivalent as approved by GE.

Supply and fix in replacement V shape fan belt of size B120 complete all as specified and as directed. Make :- Fenner or equivalent as approved by GE.

Supply and fix in replacement transformer of capacity 1.5 VA single phase having 220 V AC input and 13 V AC output as per existing installed on site complete all as specified and as directed.

Supply and fix in replacement motorized valve suitable for 80 mm dia pipe having technical specification as power AC 220 V, torque 50N.M, current rating 0.24A, operating time 20S, having manual and auto option complete all as specified and as directed.

Supply and fix in replacement castle motorized valve suitable for 40 mm dia pipe having technical specification as power AC 220 V, torque 50N.M, current rating 0.24A, operating time 20S, having manual and auto option complete all as specified and as directed.

Supply and fix in replacement water pressure gauge meter stainless steel body 63 mm dia, having upto 7 bar range to be fix in 80 / 100 / 125 / 150 mm bore MS pipe complete all as specified and as directed. Make :- Baumer or equivalent as approved by GE. Note :- Welding / drilling / threading work for fixing of meter is included in he unit quoted rate of this item.

rajesh builders

Panwar Electricals