Repair maint of Central AC Plant Package type AC plant at AF Stn Jaisalmer

M&L for comprehensive maintenance of central water cooled& AIR -cooled AC plants equipments and connected machineries as described below by the authorised representative :- (A) EQUIPMENT DETAILS -

600 TR AC Plant (2x300 TR working + 1x300 TR standby)-01, Make : Blue Star

100 TR AC Plant (2x50 TR working + 1x50 TR standby)-01, Make : Blue Star

78 TR AC Plant (2x39 TR working + 1x39 TR standby)-01, Make : Voltas

52 TR AC Plant (2x26 TR working + 1x26 TR standby)-02, Make : Voltas

50 TR AC Plant (2x25 TR working + 1x25 TR standby)-02, Make : Voltas

50 TR AC Plant (1x50 TR working + 1x50 TR standby)-01, Make : Blue Star

38 TR AC Plant (1x38TR working + 1x38 TR standby)-01, Make : Blue Star

22 TR AC Plant (2x11TR working + 1x11 TR standby)-01, Make : Voltas

17.5 TR AC Plant (2x8.75TR working + 1x8.75 TR standby)-04, Make : Voltas

12 TR AC Plant (1x12 TR working + 1x12 TR standby)-01, Make : Voltas

8.75 TR AC Plant (1x 8.75TR working )-05, Make : Voltas

Connected refrigerant controls like pressure gauges, pressure switches, thermostats & solenoid valves.

Connected water pipe lines & valves

Connected Air ducting, dampers, grills, air diffusers and insulation both acoustic and thermal.

Connected electrical system including distribution boards and MCCB panels

Connected instrumentation, controls and cabling.

Note for item no 1.01 to 1.11

(A) CHILLER SYSTEMS -

1. Check flow switch operation for proper operation.

2. Checking condition and setting of panel controls, operating controls, safety controls to ensure optimum performance, reliability and replacement of the same if found necessary.

3. Cleaning of Pot strainers in water circuit.

4. Lubricating all bearings as required.

5. Checking of alignment of coupling in direct driven components.

6. Checking of AC systems and monitoring for any oil or gas leakages.

7. Checking of pressure controls (HP/LP/OP/WP), refrigerant pressure gauges, water pressure gauges, temperature gauges, expansion valves, refrigerant valves, strainer/driers, thermostats and solenoid valves etc.

(B) CHILLER / CONDENSER WATER PUMP -

4. Checking/rectifying of alignment of coupling in direct driven components.

(C) AHU SYSTEMS -

1. Checking, rectification, repair and replacement of GI ducting, thermal/acoustic insulations, dampers, tinkering, welding and painting to ensure smooth function of the equipments.

3. Checking of AHU fan motor, Impeller housing, shaft and bearings.

4. Checking of belt tension and alignment of motor, tightening of V-belts.

6. Checking the electrical control and set points for operation and adjusting the setting if necessary. Inspect cables for loose/loaded terminals, rectify if necessary.

9. Check for V-belts and filter assembly/canvas cloth condition and replace if required. Note : Cost of V-belts and filter assembly shall be measured and paid under the relevant items of this schedule.

10. Motor terminals shall be checked and properly tightened.

11. Checking of alignment of coupling in directed driven components.

(D) COOLING TOWERS

1. Checking of cooling tower nozzles, sprinklers, cooling tower motors and fans.

4. Checking and rectification of any leakage from valves,Joints or Basin

(F) ALL ELCTRICAL PANELS AND CONTACTORS -

1. Checking the electrical control and set points for operation and adjusting the setting if necessary.

3. Checking electrical panels & cabling at plant room and all control cabling.

(H) FAN COIL UNIT -

(H) CENTRIFUGAL FAN, EXHAUST FAN -

(K) GENERAL -

1. Checking the plant performance.

2. Checking of faulty spare parts of all electrical panels/motor control panel, pump panels, winding of motors and relay etc. and taking out defective spares against repaired or new spares. Note : Cost of new spares will be measured and paid under the relevant items of this schedule.

3. Checking to be done to notice abnormal operational noise in the running of plant/condenser/chilled water pump and corrective action to be taken as required.

4. The contractor should check over heating of compressor/ condensor/chilled water pumps and corrective action be taken as required.

7. Contractor shall ensure proper ground earthing of plant, motors and requisite corrective action is to be taken.

9. Checking of all water pipe lines, water line valves including non-return check valves, water strainers and repair/ rectification/ replacement of defective parts.

10. Checking, maintaining and ensuring smooth function of the equipments without any abnormalities in noise, temperature, pressures and current drawn by the motors and carrying out rectification/repair/replacement of defective parts. Note : Spares to be replaced will be measured and paid under the relevant items of this schedule.

(L) RECOVERIES FOR NON PERFORMANCE -

2. Call made before 1600 Hrs shall have to be attended on same day. Call made after 1600 Hrs shall be attended by 1000 Hrs on next day.

4. The corrective/breakdown maintenance is to be carried out any time during 24hrs inclusive of all Sunday & Holidays.

5. Minor Maintenance :- Inclusive of Repairing and Replacement of all Spares/Components and all other associated accessories which are covered otherwise and attention of all defects other than major defects. (i) Respose Time (Maximum) - 03 hours (ii) Attending Time (Maximum) - 06 hours

6. Major Maintenance :- Inclusive of Repairing and Replacement of all Spares/Components and all other associated accessories which are covered otherwise and attention of all defects other than major defects. (i) Respose Time (Maximum) - 03 hours (ii) Attending Time (Maximum) - 24 hours (Should be in proportion with the type of failure).

7. In case of major complaints such down of system more than 36 hours whenever the standby equipment is not available for service a penalty of Rs 1000/- per day shall be imposed subject to maximum of Rs 15000/- depending upon the continuity of the shutdown.

8. The complaints which cannot be attended to within above specified time limit on technical grounds, be brought to knowledge of Engr-in-charge for taking suitable remidial action.

9. The scope of work includes preventive maintenance of air conditioning plant, etc. The same should be carried out on Saturdays, Sundays and holidays with prior intimation to Engr-in-charge. Contractor shall work out time schedule for carrying out preventive maintenance in consultation with Engr-in-charge.

10. The contractor shall be entirely responsible for all safety precautions required

11. All units of the AC plants like Compressors, pumps, motors, blower, etc. should be maintained in optimum condition. They will be checked for proper functioning and defective spares will be replaced if necessary. Consumables like oil, gas, contactors, switches, valves, etc and jobs like descaling, rewinding, gas charging, oil filling etc. will be measured and paid under the respective items of this schedule.

12. No additional payment shall be made for transportation of equipment from the AC plant site to the Firm's ware house or delivery of the materials to the AC plant site at any point of time.

13. The firm shall make good all the losses occurred during servicing, overhauling, repairing and maintenance of plants without any additional cost.

(M) The following maintenance services are not covered under comprehensive maintenance of Central AC plant -

1. Repair/overhaul of the compressor, condensor, chiller, motor, cooling tower, cooling tower fittings, heating/cooling coils, fans, FCUs, AHU, Sheet metal parts, valves, sensors etc.

2. Repair/replacement of electrical main switch/circuit breaker, main incoming cable, fuses and indication lamps.

3. Repair/replacement of component of main electrical distribution board and distribution power control cabling.

4. Repair/replacement of chilled water and condenser water valves and water piping, and all kind of masonry/ structural work.

5. Ducting and its accessories like dampers of all types, Thermal and acoustic installation, all type of piping and valves, electrical panel cabling, control wiring, bulbs and fuses.

6. Repair/replacement of fine filters and absolute filters.

7. Rewinding job of motors etc.

8. Gas charging job.

9. Compressor oil filling job.

10. Descaling job(s).

11. Cleaning of cooling tower

12. Cleaning of AHU and its filters.

13. Cleaning of Air ducts.

14. Painting of any component of AC plant.

Providing and carrying out a comprehensive technical inspection and detailed condition assessment of the existing ZECO/EDGETECH make Air Handling Unit(s) of installed capacity as per site requirement, through OEM i.e. ZECO Aircon Limited,EDGETECH or their duly authorised / accredited service agency only. The agency shall depute OEM-authorised and technically qualified service engineers to carry out a complete system audit of the AHU installation. The scope of inspection shall include detailed examination and performance assessment of the AHU casing and panels, insulation condition, access doors, air filters (pre-filter / fine filter), cooling and/or heating coils, condensate drain tray and piping, fan and motor assembly, belt and pulley system (where applicable), bearings, vibration isolators, flexible connections, dampers, actuators, mixing box (where provided), fresh air and return air sections, and all associated mechanical accessories.

The inspection shall further include checking of airflow characteristics, fan performance, static and dynamic pressures (where feasible), air leakage, alignment and balancing aspects, noise and vibration levels, and overall mechanical integrity of the unit. Electrical components and controls related to the AHU such as motor starters, VFD (if provided), control wiring, interlocks, sensors, safeties and BMS interface points shall also be inspected for functionality and condition. The agency shall record all relevant operating parameters, identify and list defective, weak, deteriorated or non-functional components, and assess the remaining serviceability and reliability of the AHU under existing operating conditions. Based on the inspection, the OEM / authorised agency shall provide technical observations, engineering recommendations and OEM-recommended corrective actions, including suggested replacement or refurbishment items, if any.

A detailed technical inspection and assessment report shall be prepared and submitted strictly as per the prescribed “Engineering Charges / Technical Evaluation Report” format, and With OEM recommendations

M&L for Servicing & Cleaning of bottom tray and cleaning of cooling coil complete with high pressure vaccum cleaner without damaging cooling coils and fins and remove all the scale and foreign material deposited in side the coil followed with air pressure to sweep up all the particles and ensure through flow of air over the cooling coilof AHU unit and connected itemes by the authorised representative :-

39000 CFM AHU

32000 CFM AHU

20300 CFM AHU

17200 CFM AHU

15000 CFM AHU

14000 CFM AHU

12000 CFM AHU

11000 CFM AHU

10000 CFM AHU

6000 CFM AHU

4500 CFM AHU

M&L for Servicing& cleaning of cooling coil complete with high pressure vaccum cleaner without damaging cooling coils and fins and remove all the scale and foreign material deposited in side the coil followed with air pressure to sweep up all the particles and ensure through flow of air over the cooling coil of AHU unit of Velling Mounted AHU unit and connected itemes by the authorised representative :-

3000 CFM ceiling mounted AHU

2500 CFM ceiling mounted AHU

2000 CFM ceiling mounted AHU

S&F in replacement DX TYPE coil with fins, for air cooled package type 11 tr dual compressor of Votas Model NO DPUASC2110Y same as existing coil area, GI coil casing / blank offs, coil section with row (as existing) with single number of distributers, copper tube material, 12.7mm tube dia, 25 SWG/ 0.5 mm thickness of tube, 4 RD cooling, coil copper head. Note :- (i) Contractor shall carried out complete pump down the system with recovery unit and take all refrigerent Gas from the system in refrigerent bottle with recovery unit and store at safe place for reuse. (ii) Contractor shall arrange necessary T &P and experience technician to carring out cutting of existing copper pipe lines from expansion valves to AHU Coils and supply and fixing with addition alteration to new copper tubing as recommended by OEM. (iii) Cost of following works shall also deemed to be included in the rates quoted by the contractor:- (a) Charging of nitrogen Gas in unit & complete system at 300 psi pressure and checking of any dropping of pressure / leakage up to 72 Hrs after replacement of AHU Coil and cutting and addition alteration with copper tuning. (b) Vaccumisation of complete system for minimum 2 days for dropping of vacuum pressure & rectification of leakage if any. (c) Charging of complete system with R - 22 gas stored in bottle recover from system for maintaining the system pressure up to HP - 175 psi & LP - 65 psi. (d) Measure the inlet and outdoor temperature of package unit and maintain temperature as per required at site. (e) Testing & commissioning of compressor after completion.

Supply and fixing in repair of AHU Shaft bearing (02 Nos in each) of for required size capacity AHU as per site requirement complete all as specified and directed.

Supply and fixing in replacement V-belt of following sizes complete all as specified and directed. Make:-polycab,finner ,havelles

Disconnection and after disconnecting electric connection removing of 50-10HP Chiller /Condenser pump alongwith suction, delivery pipe line, control valves etc and opening for inspection, finding out the unserviceable parts and refixing the disconnected parts after replacing of unserviceable items with new of same size and capacity including testing and commissioning complete all as direted.

Disconnection and after disconnecting electric connection removing of 7.5-0.5HP Chiller /Condenser pump alongwith suction, delivery pipe line, control valves etc and opening for inspection , finding out the unserviceable parts and refixing the disconnected parts after replacing of unserviceable items with new of same size and capacity including testing and commissioning complete all as direted.

M&L for repair of leaking joint of 50-10HP Chiller /Condenser pump alongwith suction, delivery pipe line, header pipe line control valves etc by removing existing broken fitting, rethreading of pipes, greasing, glen- dori and rubber packing of pump set re-connecting of pipe, testing of joint will be include in the unit rate including necessary excavation & earth work in any type of soil/floor complete all as specified & as directed.

M&L for repair of leaking joint of 7.5-0.5 HP Chiller /Condenser pump alongwith suction, delivery pipe line, header pipe line control valves etc by removing existing broken fitting, rethreading of pipes, greasing, glen- dori and rubber packing of pump set re-connecting of pipe, testing of joint will be include in the unit rate including necessary excavation & earth work in any type of soil/floor complete all as specified & as directed.

Dismantling of Centrifugal/Monoblock Motor electric driven of any make, any type & any capacity and cleaning, overhauling including repairing to pump shaft (if required) by remetalling, grinding, polishing and reassembling by necessary machining & welding work including minor spares and replacement of unserviceable spare parts and reassembling the components & testing for function ability, complete, all as specified & directed. Notes :- (i) The spare parts required to be replaced shall be measured and paid for separately as “Supply only” under the relevant items here-in-after. (ii) Unit rate (quoted by the tenderer) shall be deemed to include for all minor spares. The decision of Accepting officer regarding minor spares shall be final, conclusive and binding. (iii) Rectification period for centrifugal pump set should not more than 48 Hrs from the time of intimation to the contractor, fell in which penelty of Rs 1000 on every day of delay, will be laible to the contractor. (iv) Unit rate (quoted by the tenderer) shall be deemed to include loading/unloading and transportation to & from authorised workshop or carrying out servicing onsite as required.

Supply only following spare parts suitable for electric motor of Chiller /Condenser/Cooling tower motor of centrifugal pump/Monoblock pump , 3 phase 440 Volt any make 0.5/3/5/10/30/50 HP capacity as directed by Engineer-in-Charge :-

Bearing bush for motor housing Upper/Lower G.M

Pump bearing as per existing.

Pump Oil seal

Mechnical seal

Impeller

Impeller Key

Star & Rubber Coupling for motor pump

Flange stud with nut & bolts

Motor stud with nut & bolts

Repair to stator slot

Guide / Distance Bush

Rubber gasket suitable for motor pump flage flange, duly cut & drilled holes, 3mm thick, Nylon thread bonded.

Gland nut bolts

Pump shaft for 50/30/20/15 HP

Rotor suitable for 50/30 HP motor

Rotor suitable for 20/15/10 HP motor

Rotor suitable for 5/3 HP motor

Supply and fixing in replacement bakelite terminal plate of 6 way including brass studs, bolts and nuts etc suitable to match any make of 3 phase electric motors and capacity up to 50 HP complete all as specified and directed.

M&L for taking out the burnt winding of electric motor of Chiller /Condenser/Cooling Tower of centrifugal pump/Monoblock pump , 3 phase 440 Volt any make and rewinding the same with new super enamelled copper wire of same gauge and with equal number of turns including insulation material and reassembling the motor including testing, complete, all as specified & directed.

Material and labour for disconnecting electrical supply, dismantling the cooling tower motor from its frame installed at height, loosening coupling hardware, removing anti-vibration mounts, lifting and lowering the motor safely to ground level using hydra/crane with all manpower, slings, tools and safety arrangements; carrying out required servicing/repairs after lowering, such as bearing replacement, gasket replacement, terminal block repair, fan cover repair, rotor key replacement, shaft polishing/remetalling (if required), reassembling and testing; including loading/unloading and transportation of the motor to and from an authorised workshop wherever workshop-level repair is required; and thereafter refixing the motor at its original location, tightening angle-iron frame hardware, re-alignment of coupling, reconnection of electrical supply, and testing & commissioning after installation, complete all as specified and directed.

Material and labour for complete descaling of Cooling Tower (FRP ) of any capacity by stopping the system, draining and removing basin water, cleaning and removing sludge, mud, algae, fungus and scale deposits from basin, fill media, drift eliminators, louvers, sump area, internal FRP surfaces, distribution headers and spray nozzles; removing and washing fill packs, eliminators and louvers; brushing andintially with high-pressure jet cleaning of all accessible internal surfaces; cleaning of fan blades, fan guard, motor top and ventilation slots and after that descaling of basin and water distribution parts with approved chemicals (recommended By OEM); refixing all dismantled components properly, ensuring correct seating of fill packs and louvers; checking fan alignment after cleaning; refilling clean water, ensuring uniform water circulation, and functional testing of cooling tower complete all as specified and directed.

Dismantling of existing worn out electric motor of CT Fan of cooling tower and S&F in repair with testing and commissioning totally enclosed weather proof IP-55, Flange Mounted Extended Shaft electric CT Fan Motor with following specification complete all as specified and as directed:- three phase squirrel cage motor, Capacity 15 HP, 960 RPM, 415V, 50HZ with all connected accessories and all fitting suitable for same as Existing cooling tower . Motor complete all as specified and as directed.

Dismantling of existing worn out electric motor of CT Fan of cooling tower and S&F in repair with testing and commissioning totally enclosed weather proof IP-55, Flange Mounted Extended Shaft electric CT Fan Motor with following specification complete all as specified and as directed:- three phase squirrel cage motor, Capacity 3 HP, 1440 RPM, 415V, 50HZ with all connected accessories and all fitting suitable for same as Existing cooling tower . Motor complete all as specified and as directed.

M&L for servicing the existing rotational sprinkler assembly of cooling tower, including removal of sprinkler head and arms (only as required), cleaning scale/sludge/dust deposits from arms and nozzles, checking free rotation, lubricating rotating points (where applicable), rectifying water-throw direction by adjusting nozzles, ensuring smooth uniform rotation, refixing the assembly in position and testing water distribution, complete all as specified and directed.

M&L for taking down the unserviceable rotational sprinkler assembly of cooling tower, including disconnecting water supply, removing sprinkler head, arms and nozzles, supplying and fixing new aluminium rotational sprinkler assembly of suitable size compatible with existing water distribution system, fixing arms and nozzles correctly, ensuring proper alignment, tightening all joints, connecting the water supply and commissioning the sprinkler to achieve uniform water distribution, complete all as specified and directed.

M & L or Aluminium Fan Assembly for Cooling Tower, Single unit complete with corrosion-resistant aluminium blades, hub, shaft, bearings, coupling, and all necessary fasteners. Fan assembly shall be dynamically balanced, vibration-free, as per existing size . Assembly shall be factory-assembled, tested, and ready for direct installation.

Supply and fixing in repair Fins for cooling towers, Flute size 12mm and 19mm, thickness 0.175mm to 0.20mm, 24" x 12" x 6" (600mm x 300mm x 150mm) or any other size as per sample complete all as specified and directed.

M&L for carrying out complete flushing and cleaning of existing Chilled Water (CHW) pipeline network of AC Plant under full system shutdown, including isolation of chiller and pumps, removal of all CHW strainers (pump suction, AHU/FCU strainers and equipment strainers), draining of entire system through all low-point drains, filling with fresh water and performing high-velocity flushing by operating CHW pumps in manual mode, opening all valves to achieve maximum flow velocity, purging sludge/silt/rust continuously through low-point drains, carrying out mild non-corrosive chemical cleaning (where required) with proper neutralisation, final fresh-water rinse till outlet water becomes clear, re-fixing all strainers after cleaning, refilling the system with fresh water, complete air-venting from all high points, restoring system to original condition, testing the flow and ensuring the CHW pipeline is clean, clear, obstruction-free and fit for commissioning/operation. Complete all as directed by Engineer-in-Charge.”

Taking down existing damaged insulation of Chilled Water (CHW) pipeline of any diameter, removing old insulation material, scraping and cleaning pipe surface to remove rust/dust, preparing surface and providing & fixing new closed-cell elastomeric insulation (NBR/XLPE) of required thickness (13/19/25 mm as per site requirement), sealing all longitudinal and transverse joints with compatible adhesive/foil tape, ensuring complete vapour-barrier protection; and thereafter providing & fixing aluminium sheet cladding of 26 SWG (min.) over the insulated pipeline with proper overlapping, bending around elbows/tees/valves, fixing with stainless-steel bands/rivets, making the system fully weather-proof, UV-proof and condensation-free; complete all as per manufacturer’s instructions and as directed by Engineer-in-Charge Make:-A- flex/Armacell/ALPP

Supply and fixing in replacement cast iron butter fly valves lever operated SS disc type nitrile/EPDM rubber lining PN 16 of following size dai complete all as specified and as directed. (Make: - ADVANCE/ AUDCO/ LEADER/CASTLE/ NVR/ ZOLOTO).

100 mm dia.

80 mm dia.

S&F Non-Return Valve (NRV) in Chilled Water (CHW) pipeline of following size ( mm dia), PN-16 rating, wafer / swing type, body of Cast Iron / Ductile Iron (as specified), stainless steel hinge pin and disc, EPDM seat, suitable for chilled water temperature 5°C–15°C, installed between flanged joints with approved quality gaskets and high-tensile bolts/nuts, including cutting of existing pipeline, alignment, welding/fabrication of required flanges/spools, pressure testing after installation, complete all as directed by Engineer-in-Charge

100 mm dia.

80 mm dia.

Supply (in company sealed cylinders of any capacity) and charging Following refrigerant gas for filling in compressors as per requirement complete all as specified and directed by Engr-in-charge. Make:- Mefron/ Floron/ Refron/Honeywell Note : 1. If the recharged refrigerant gas is leaked within 45 days of running of AC plant, the contractor shall recharge gas (including supply) without any extra cost to the department. 2.Contractor shall provide a Test Certificate (TC) of refrigerant supplied, confirming purity and compliance with relevant standards. 3. Charging shall be strictly carried out using a digital weighing scale, and the weight-charged shall be Monitor jointly by the contractor and the Engineer-in-Charge.

Top up of Polyol-Ester (POE) compressor oil, grade ISO VG-68, compatible with Following refrigerent water-cooled chiller compressors, in original manufacturer sealed drums, including loading, unloading, handling and safe delivery at site. The oil shall be chemically pure, low moisture (max 50 ppm), low acid number (≤0.03 mg KOH/g) and free from contaminants or suspended matter. Supplier shall provide Manufacturer’s Test Certificate confirming viscosity grade, moisture content, acidity and batch details. Oil charging shall be carried out strictly as per OEM recommendations and actual site requirement, ensuring nitrogen-blanketed handling due to hygroscopic nature of POE oils. Payment shall be made on actual quantity charged to the system, complete all as specified and directed by Engineer-in-Charge.

Providing and Carrying out comprehensive technical inspection and assessment of the existing Blue Star Screw chiller plant LCWI-1070FA of a capacity 600TR having 3 unit of 300 TR through with OEM / their accredited or authorised agency onl, the shall depute authorized service engineers to carry out a complete system audit covering the chiller package, compressor, condenser, evaporator, pumps, cooling tower, refrigerant circuit, valves, electrical controls and all associated accessories, record all operating parameters, identify and list defective/weak/non-functional components, verify refrigerant leakage, check safety interlocks, and prepare a detailed assessment report strictly as per required “By Engineering Charges / Technical Evaluation Report” format and OEM-recommended replacement items; preventive maintenance is excluded from this scope and shall be undertaken separately as and when ordered, and no repair or rectification activity shall be carried out during the assessment visit without written approval.

Providing and carrying out comprehensive technical inspection and assessment of the existing Blue Star Scroll compressor water cooled air-conditioning plant, Model No. XWC45052AR2, having three (03) units of 52 TR each, using refrigerant R-407C, through OEM i.e. Blue Star Limited or their accredited / authorised service agency only. The agency shall depute authorised service engineers to carry out a complete system audit covering the packaged AC units, scroll compressors, condenser, evaporator, refrigerant circuit, valves, electrical panels and controls, safety interlocks, sensors and all associated accessories. The inspection shall include recording of all operating parameters, verification of refrigerant leakage, checking of compressor performance (each unit comprising Danfoss scroll compressors, Model No. SZ185S4RC of 13 TR capacity), evaluation of electrical and control systems, and identification and listing of defective / weak / non-functional components. A detailed technical assessment report shall be prepared strictly as per the prescribed “Engineering Charges / Technical Evaluation Report” format, duly supported with photographic evidence and OEM-recommended replacement items, if any. Preventive maintenance is excluded from the scope of this item and no repair, rectification or replacement activity shall be carried out during the assessment visit without prior written approval of the Engineer-in-Charge.

Providing and carrying out comprehensive technical inspection and assessment of the existing Voltas scrool compressor water cooled air-conditioning plant, Model No. WCDS039DPMN3X1P, having three (03) units of 39 TR each, using refrigerant R-407C, through OEM i.e.Tata Voltas Limited or their accredited / authorised service agency only. The agency shall depute authorised service engineers to carry out a complete system audit covering the packaged AC units, scroll compressors, condenser, evaporator, refrigerant circuit, valves, electrical panels and controls, safety interlocks, sensors and all associated accessories. The inspection shall include recording of all operating parameters, verification of refrigerant leakage, checking of compressor performance (each unit comprising Danfoss scroll compressors, Model No. SZ185S4RC of 13 TR capacity), evaluation of electrical and control systems, and identification and listing of defective / weak / non-functional components. A detailed technical assessment report shall be prepared strictly as per the prescribed “Engineering Charges / Technical Evaluation Report” format, duly supported with photographic evidence and OEM-recommended replacement items, if any. Preventive maintenance is excluded from the scope of this item and no repair, rectification or replacement activity shall be carried out during the assessment visit without prior written approval of the Engineer-in-Charge.

Supply, installation, testing and commissioning of new MCS MAGNUM Master Controller REV 11.1 suitable for Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA, Power Supply 400V, 3 Phase, 50 Hz, including disconnection and removal of old controller, supply of new controller with necessary accessories, expansion boards, wiring, terminations, programming, integration with existing plant control system, on-site configuration, functional testing under full load, and handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Supply, installation, testing and commissioning of new MCS MAGNUM Master Controller REV 11.1 suitable for Blue Star Water Cooled Screw Chiller, Model No. XWC-35/45-039/052-AR2 Power Supply 400V, 3 Phase, 50 Hz, including disconnection and removal of old controller, supply of new controller with necessary accessories, expansion boards, wiring, terminations, programming, integration with existing plant control system, on-site configuration, functional testing under full load, and handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Replacement of existing Unsv MCS MAGNUM Display Unit with supply, installation, testing and commissioning of new MCS MAGNUM keypad display with controller suitable for MCS MAGNUM Master Controller REV 11.1 for Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA , including disconnection and removal of old keypad/display, supply of new keypad/display with necessary mounting accessories, wiring terminations, integration with existing controller, on-site configuration, functional testing, and handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Replacement of existing Unsv MCS MAGNUM keypad display with controller Unit with supply, installation, testing and commissioning of new MCS MAGNUM keypad display with controller suitable for MCS MAGNUM Master Controller REV 11.1 for Blue Star Water Cooled Scroll Chiller, Model No. XWC-35/45-039/052-AR2, including disconnection and removal of old keypad/display, supply of new keypad/display with necessary mounting accessories, wiring terminations, integration with existing controller, on-site configuration, functional testing, and handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Replacement of existing Unsv EXV Driver EKD 316 (24V AC/DC) with supply, installation, testing and commissioning of new EXV Driver EKD 316 (24V AC/DC) suitable for Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA , including disconnection and removal of old driver, supply of new driver with necessary mounting accessories, wiring terminations, integration with existing control system, on-site configuration, functional testing, and handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Replacement of existing Unsv MCS Temperature Sensor MCS-T100-20 with supply, installation, testing and commissioning of new MCS Temperature Sensor MCS-T100-20 suitable for Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA , including disconnection and removal of old sensor, supply of new sensor with necessary accessories, wiring terminations, integration with existing control system, on-site configuration, functional testing, and handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

M&L for repair /replacemt of Current Transformer (CT) 100/5A, epoxy resin cast, suitable for Scroll Compressor circuit of Blue Star/Voltas make Chilleras required model , accuracy class 1.0, burden minimum 10 VA, suitable for 415 V, 50 Hz system, complete with mounting, terminal cover and accessories, conforming to IS/IEC standards, including fixing, testing and commissioning, including disconnecting & taking down old unserviceable MCCB, complete all as specified and directed.

Supply and fixing in repair Expansion Valve Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA for Chillar Plant as per existing size complete all as specified and directed.

Supply and fixing in repair Expansion Valve including brazing for Water Cooled Scrool Compressor Danfoss-SZ185S4RC Chiller plant 11 TR for Chillar Plant as per existing size complete all as specified and directed.

Supply and fixing in repair in repair drier filter Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA for Chillar Plant as per existing size complete all as specified and directed.

Supply and fixing in repair/replacement hearmatic sealed drier filter -DN/DCL 305 for Chillar Plant & taking down old unserviceable, complete all as specified and directed. Make: Danfoss/indofoss complete all as specified and directed.

Supply and fixing in repair/replacement hearmatic sealed drier filter -DML 165S(023Z504591) for Chillar Plant & taking down old unserviceable, complete all as specified and directed. Make: Danfoss/indofoss complete all as specified and directed.

Supply and fixing of Brass made Angle Valve 1/4 " X 1/4" as per existing complete all as specified and directed.

Supply and fixing in repair/replacement Crankcase heater Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA for Chillar Plant as per existing size complete all as specified and directed.

Supply and fixing in repair/replacement Crankcase heater -SM- 185- 75W for Chillar Plant & taking down old unserviceable, complete all as specified and directed. Make: Danfoss/indofoss complete all as specified and directed.

Supply and fixing of High pressure (HP) Switch for Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing of Low pressure (LP) Switch for Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair/replacement High pressure (HP) Switch for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency & taking down old unserviceable, complete all as specified and directed.

Supply and fixing in repair/replacement Low pressure (LP) Switch for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency & taking down old unserviceable, complete all as specified and directed.

Supply and fixing of pressure control Switch for scroll Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency & taking down old unserviceable, complete all as specified and directed. Make: Danfoss/indofoss complete all as specified and directed.

Supply and fixing of pressure control Switch for Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing of Moisture indicator for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing of water flow switch for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing of PR. Diff switch RT262A(017D002566) for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing of PRSS. Differential switch IPSD50 for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing of Pressure realase valve 1/2" NPTX 300PSI for Chillar Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing of Chiller controller SPP-PHR AUX 230VAC For scroll chiller Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair/replacement of M M2VPD WOD Range -1-10 AMP(Part NO :ACGSCMPC0015 ) For scroll chiller Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair/replacement of PLC based controller 12 TR series (Model NO :12TRADVSCR V2A R6/5/2 SWBMS) For scroll chiller Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair/replacement of NTC thermister For scroll chiller Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair/replacement of HMI with controller 4.3" for 12/24/26/36TR scroll wc with soft BMS(5-36A) For scroll chiller Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair/replacement of ball valve 5/8" castle For scroll chiller Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair/replacement of ball valve with S. Glass 5/8"(model no:-907205SG) For scroll chiller Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair/replacement of Schrader Vlv-3/8" solder For scroll chiller Plant as per existing size /recommanded by OEM or their accredited / authorised service agency complete all as specified and directed.

Supply and fixing in repair solenoid valve Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA for Chillar Plant as per existing size complete all as specified and directed.

Supply and fixing in repair solenoid Coil Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA for Chillar Plant as per existing size complete all as specified and directed.

Repair/maint and servicing of condensor fan motor for outdoor unit i/c ball bearing, studs, nuts, bolts, washers, gland packing, greasing etc as required complete all as specified and directed.

Supply and fixing in repair Air Purching valve with Ball valve of size 15mm complete all as specified and directed.

M&L for cleaning and servicing the evaporator section of water/air- Cooled package type AC units of each unit have following capacity TR, including opening access panels, brushing and blowing cooling coil, applying non-acid evaporator chemical, rinsing with low-pressure water, cleaning blower wheel, drain tray and drain line, checking airflow, tightening electrical terminals, inspecting insulation and restoring the unit to proper working condition, complete all as specified and directed.

M&L for thorough chemical cleaning of the condenser coil of air-cooled AC units of following TR each unit capacity, involving isolation of power supply, opening of top and side covers, removal of loose dust and debris, uniform application of fin-safe alkaline coil-cleaning chemical, sufficient soaking to dissolve oily deposits and atmospheric contaminants, complete washing with controlled high-pressure water jet, straightening of bent fins to restore airflow, cleaning of fan guard, checking smooth operation of fan motor, tightening of terminals, verifying ampere load and vibration, refixing covers and restoring the unit to normal working condition, followed by performance checking, complete all as specified and directed. Note: Only non-corrosive descaling chemical shall be used. Any tube blockage or damage due to negligent handling shall be rectified by the contractor at his own cost. One condenser of one package unit shall be measured as one job.

Supply and fixing in repair/replacement harmetic sealed design liquid line filter drier having solid desiccant core conisting of molecular sieve and activated alumina with suitable for ductable package type Air Conditioner Plant of capacity 8.75 TR to 22TR following size (in MM) complete all as specified and directed. Make: Danfoss/indofoss complete all as specified and directed.

Providing and carrying out comprehensive technical inspection and assessment of the existing TATA Voltas package type air-cooled air-conditioning plant, Model No. ACDPUAS08.750, having cooling capacity of 8.75 TR with single compressor configuration, through OEM i.e.M/s TATA Voltas Limited or their accredited / authorised service agency only. The agency shall depute authorised service engineers to carry out a complete system audit covering the packaged AC unit, compressor, air-cooled condenser, evaporator, refrigerant circuit, valves, electrical panels and controls, safety interlocks, sensors and all associated accessories. The inspection shall include recording of all operating parameters, verification of refrigerant leakage, checking of compressor performance, evaluation of electrical and control systems, and identification and listing of defective / weak / non-functional components. A detailed technical assessment report shall be prepared strictly as per the prescribed “Engineering Charges / Technical Evaluation Report” format, and OEM-recommended replacement items, if any. Preventive maintenance is excluded from the scope of this item and no repair, rectification or replacement activity shall be carried out during the assessment visit without prior written approval of the Engineer-in-Charge.

Supply and fixing of High pressure (HP) Switch for air cooled package type PSI as per recommanded by OEM or their accredited / authorised service agency complete all as specified and directed. Make : Indfoss/Danfoss as per existing complete all as specified and directed.

Supply and fixing of low pressure (LP) Switch for air cooled package type PSI as per recommanded by OEM or their accredited / authorised service agency complete all as specified and directed. Make : Indfoss/Danfoss as per existing complete all as specified and directed.

Supply, installation, testing and commissioning MPD With display suitable for Voltas make package type air-conditioning plant, Model No. ACDPU-AS0/WSC-8.75, single compressor configuration, including supply of OEM-approved MPD of appropriate current range (7–22 Amp), proper mounting inside the control panel, complete control and sensing wiring with CT connections, setting and calibration of MPD at rated compressor current as per OEM recommendations, adjustment of time delay and protection parameters, functional testing for overload, phase failure and imbalance protections, checking of interlocks and safe operation, and commissioning of the system to ensure reliable protection of compressor motor, complete in all respects, inclusive of all materials, labour, tools, testing instruments and doc

S&F of MPD display / indication module compatible with existing MPD installed , including verification of current indication, status and fault indications, functional testing for correct display of operating parameters and alarms, and commissioning of the system to ensure reliable monitoring, complete in all respects, inclusive of all materials, labour, tools complete all as directed by Engineer-in-Charge.

M&L for MPD transformer (CT) 12v suitable for existing Motor Protection Device installed in Voltas make package type air-cooled air-conditioning plant, Model No. ACDPUAS08.750 of 8.75 TR capacity, including supply of OEM-approved CT of appropriate rating, proper mounting on compressor power cable, correct polarity and secure fixing, termination of secondary wiring up to MPD terminals, verification of current sensing accuracy, functional testing under operating conditions and commissioning to ensure correct current measurement and protection operation ,complete all as directed by Engineer-in-Charge.

M&L for MPD Bakelite fuse 5 AMP suitable for existing MPD Device complete all as directed by Engineer-in-Charge.

M&L for MPD Glass fuse 1 AMP suitable for existing MPD Device complete all as directed by Engineer-in-Charge.

Supply, installation, testing and commissioning of thermostatic expansion valve TXV Type suitable for refrigerant R-407C / R-22, of capacity range 5 TR to 11 TR, compatible with existing air-cooled packaged air-conditioning system and equalization arrangement (as per existing), complete installation with necessary brazing complete all as directed by Engineer-in-Charge.

Repair/Replacement of high pressure interconnecting refrigerant pipe of following sizes between indoor & outdoor units as per specifications and PVC sleeves shall be provided wherever pipe is crossing the wall. Food grade nitrogen shall be used while making brazing joints complete all as specified and directed: -Make- Mandev/ Rajco/ Maxflow

1/2 Inch copper pipe

3/8 Inch copper pipe

5/8 Inch copper pipe

7/8 Inch copper pipe

Repair/Replacement of high pressure interconnecting refrigerant pipe of following sizes closed cell elastomeric nitrile rubber tubular insulation between indoor & outdoor units as per specifications.and PVC sleeves shall be provided wherever pipe is crossing the wall. Food grade nitrogen shall be used while making brazing joints complete all as specified and directed: -Make- Mandev/ Rajco/ Maxflow

7/8 Inch copper pipe

1/2 Inch copper pipe

Supply and fixing in repair complete control wiring with complete interlocking of MPD,FUSE ,blower contactor ,compressor contactor,LP/HP cut out and taking down old unserviceable wiring complete all as specified and directed.

Supply and fixing in repair/replacement LP/HP pressure switch for air cooled package type complete all as specified and directed.

Supply and fixing of Gas Charging Valve air cooled package type 1/4 inche including brazing as per existing complete all as specified and directed.

Supply and fixing of Liquid line valve for Air Conditioner Package unit 11 TR capacity in repair complete all as specified and directed.

Supply, installation, testing and commissioning of return air temperature sensor suitable for existing air-cooled packaged air-conditioning system, compatible with existing controller, of NTC / PTC type (as per existing), including proper mounting in return air path, termination on control panel, checking of sensing accuracy and functional testing, complete all as directed by Engineer-in-Charge.

Supply and Fix in repairs Air Cooled Condensor Coil complete unit having dual compressor 5.5 TR each of Package type AC Plant unit 11 TR capacity as per the Voltas Model No DPUASC2110Y and testing the AC unit complete all as specified and directed. Make: Voltas Model or Equivalent In Blue Star/ Hitachi

M&L for repairing/ Rewinding indoor package unit Blower Motor of following capacity, opening the motor, cutting & removing old and burnt winding wire, rewinding the motor with new super enameled copper winding of size & discription to match with existing including insulating materials, varnishing, drying, replacement of both driven end & non driven end bearings and base plate, reassembling, refixing in same position & connecting including testing and commissioning complete all as specified & directed:-

S&F in replacement of pully for motor/blower suitable for package unit 8.7 TR to 11 TR, including taking down unserviceable parts and refixing same complete all as directed.

S&F in replacement of blowershaft P No 205 bearing (set of two) bearing suitable for package unit 8.7 TR to 11 TR, including taking down unserviceable parts and refixing same complete all as directed.

Supply and fixing of Blower suitable fo package Air Conditioner Plant as required size in repair complete all as specified and directed.

Supply and fixing of Induction Blower Motor capacity 2.0 HP, Three Phase, 415 Volt grade, 50 Hz, AC supply, 1400 RPM, (As per Sample) in repair complete all as specified and directed. Make : CG/Kiroskar/Hindusthan

Supply and fixing of Blower Motor capacity 1.5 HP ,Single Phase, 230 volt, 50 Hz, AC supply, in repair complete all as specified and directed. Model:LK4121AN08003

Supply and fixing of Condensor Motor capacity 0.5 HP as per existing , Single Phase, 415 Volt grade, 50 Hz, AC supply in repair complete all as specified and directed. Make : CG/Kiroskar/Hindusthan

M&L, Running capacitor, 10 MFD for outdoor condenser motor of 0.5hp including taking down old unserviceable complete all as specified and directed. Make: EPCOS / SYSCAP/ ASIAN/TIBCAB

M&L, Running capacitor, 36 MFD for indoor blower fan motor of 0.5hp including taking down old unserviceable complete all as specified and directed. Make: EPCOS / SYSCAP/ ASIAN/TIBCAB

Fire redardent Canvas from pakage unit to inlet duct including accessaries and in repair in return grill with accessaries complete all as specified and directed.

Supply, installation, commissioning and testing Compressor scroll type Copper wound working on R-22, capacity 4-5 TR and compressor shall be equipped with sunction and discharge stop valves, sunctions, strainer, oil pump with oil strainer, high pressures switch and safety valves and gauges oil measuring the sunction and discharge pressure and the coil pressure shall be provied. Compressor shall be provided with unloading starting device and crank case heater system shall be provided including taking down old unserviceable compressor complete all as specified and directed. Make : Copeland Scroll Model Number ZR72KC-TFD-522, or equivalnet of Kirloskar/ELG.

Supply, installation, commissioning and testing of Compressor scroll type Copper wound working on R-407c, Capacity 8.75 TR and compressor shall be equipped with sunction and discharge stop valves, sunctions, strainer, oil pump with oil strainer, high pressures switch and safety valves and gauges oil measuring the sunction and discharge pressure and the coil pressure shall be provied.Compressor shall be provided with unloading starting device and crank case heater system shall be provided including taking down old unserviceable compressor complete all as specified and directed. Make : Danfoss Model Number HCP109T4LC6 or equivalent.

Supply, installation, commissioning and testing of Compressor scroll type Copper wound working on R-22, Model Number:-SANYO C-SB373H8F. and compressor shall be equipped with sunction and discharge stop valves, sunctions, strainer, oil pump with oil strainer, high pressures switch and safety valves and gauges oil measuring the sunction and discharge pressure and the coil pressure shall be provied.Compressor shall be provided with unloading starting device and crank case heater system shall be provided including taking down old unserviceable compressor complete all as specified and directed.

Supply, installation, commissioning and testing of Compressor scroll type Copper wound working on R-407c, Danfoss Model Number :Danfoss SZ185S4RC or equivalent Capacity and compressor shall be equipped with sunction and discharge stop valves, sunctions, strainer, oil pump with oil strainer, high pressures switch and safety valves and gauges oil measuring the sunction and discharge pressure and the coil pressure shall be provied.Compressor shall be provided with unloading starting device and crank case heater system shall be provided including taking down old unserviceable compressor complete all as specified and directed. Make : Danfoss Model Number SZ185S4RC or equivalent.

Supply & fixing MCCB 4 Pole of Following capacity Amps, 50 Hz, 415V with rupturing capacity of 25 kA including spreader terminals including taking down old unserviceable one complete all as specified and directed. Make :- L&T/ Siemens/Legrand/ ABB/ C & S

Supply and fixing in repair MCB TPN 63 Amps, capacity 10 KA, C curve including taking down old unsv one complete all as specified and directed. Make :- L&T/ Siemens/Legrand/ ABB/ C & S

Supply and fixing in repair MCB TP 63 Amps, capacity 10 KA, C curve including taking down old unsv one complete all as specified and directed. Make :- L&T/ Siemens/Legrand/ ABB/ C & S

Supply and fixing in repair MCB TP 40 Amps, capacity 10 KA, C curve including taking down old unsv one complete all as specified and directed. Make :- L&T/ Siemens/Legrand/ ABB/ C & S

Supply and fixing in repair MCB TP 16 Amps, capacity 10 KA, C curve including taking down old unsv one complete all as specified and directed. Make :- L&T/ Siemens/Legrand/ ABB/ C & S

Supply and fixing in repair MCB 2P 10 Amps, capacity 10 KA, C curve including taking down old unsv one complete all as specified and directed. Make :- L&T/ Siemens/Legrand/ ABB/ C & S

Repair/replacement of existing Unsv Contactor 3TS55 (AC-1: 400A, AC-3: 300A, 160kW, 215HP) with Contactor 3TS55 (AC-1: 400A, AC-3: 300A, 160kW, 215HP) suitable for Blue Star Water Cooled Screw Chiller, Model No. LCWX1-1070HA (1054 kW / approx. 300 TR),same size including disconnection and safe removal of old contactor, supply of new contactor with required accessories, proper mounting, wiring terminations, integration with existing power handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Repair/replacement of existing Unsv Contactor 3TF34(AC-1: 55A, AC-3: 32A, 17kW, 23HP) with Contactor 3TF34 (AC-1: 55A, AC-3: 32A, 17kW, 23HP) suitable for Voltas Water Cooled Chiller, Approx. 12 TR),same size including disconnection and safe removal of old contactor, supply of new contactor with required accessories, proper mounting, wiring terminations, integration with existing power handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Repair/replacement of existing Unsv Contactor CHINT-NC1-40 (AC-1: 60A, AC-3: 40A, 18.5kW, 25HP) with Contactor CHINT-NC1-40 (AC-1: 60A, AC-3: 40A, 18.5kW, 25HP) suitable for Blue sta Water Cooled Chiller, Approx. 12 TR),same size including disconnection and safe removal of old contactor, supply of new contactor with required accessories, proper mounting, wiring terminations, integration with existing power handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Repair/replacement of existing Unsv Contactor TC-LC1 FDP,AC1-250A,AC3-150A with Contactor TC-LC1 FDP,(AC1-250A,AC3-150A) suitable for same size including disconnection and safe removal of old contactor, supply of new contactor with required accessories, proper mounting, wiring terminations, integration with existing power handing over in fully operational condition, complete as per OEM standards and as directed by the Engineer-in-Charge.

Supply, fixing and testing in replacement of three pole power contactors of following MNX-Series including NO or NC auxiliary contact block, coil voltage 230 V ,control wiring, thimbles, etc and including taking down of old one complete all as specified and as directed. (Make -L&T/Siemens/ ABB/ C & S.)

Supply, installation, testing and commissioning of thermal overload relay of following Current Rating, MN series, Class-10, suitable for direct mounting on MNX series contactor, complete with 1NO + 1NC auxiliary contacts, manual/auto reset facility, conforming to IS/IEC 60947-4-1, complete in all respects, for following current ratings or equivalent:

4.5 – 7 Amp Range L&T:-MN2 (Cat. Part No.: SS94133OOBO / Schneider Electric – LRD series (matching range)/Siemens – 3RU series (matching range)

6-10 Amp Range L&T:-MN2 (Cat. Part No.: SS94134OOBO / Schneider Electric – LRD series (matching range)/Siemens – 3RU series (matching range)

9-15 Amp Range L&T:-MN2 (Cat. Part No.: SS94135OOBO / Schneider Electric – LRD series (matching range)/Siemens – 3RU series (matching range)

14-23 Amp Range L&T:-MN2 (Cat. Part No.: SS94136OOBO / Schneider Electric – LRD series (matching range)/Siemens – 3RU series (matching range)

20-33 Amp Range L&T:-MN2 (Cat. Part No.: SS94137OOBO / Schneider Electric – LRD series (matching range)/Siemens – 3RU series (matching range)

24-40 Amp Range L&T:-MN2 (Cat. Part No.: SS94138OOBO / Schneider Electric – LRD series (matching range)/Siemens – 3RU series (matching range)

Supply, installation, testing and commissioning of microprocessor based electronic star-delta timer suitable for automatic starting of squirrel cage induction motor, operating on 230 volts AC, 50 Hz, having independently adjustable star period with in-built transition delay to ensure non-overlapping operation of star and delta contactors, provided with dual relay outputs with minimum contact rating of 5 ampere at 230 volts AC, LED status indication for star and delta operation, timing accuracy ±1%, DIN rail / panel mounting arrangement, complete with wiring, terminations, ferrules and testing, of make SELEC model 800SD / 800SD-2 or approved equivalent, complete all as specified and as directed by Engineer-in-Charge.

Supply, installation, testing and commissioning of industrial-duty electronic star-delta timer suitable for continuous operation in motor control panels, operating on 230 volts AC, 50 Hz, having adjustable star-delta changeover time with positive mechanical and electrical separation between star and delta outputs, provided with two changeover relay contacts of minimum rating 5 ampere at 230 volts AC, high surge withstand capability, separate LED indications, stable timing characteristics with accuracy ±1%, panel / DIN rail mounting, complete with all accessories, wiring, termination and commissioning, of make GIC model MICON-175 or approved equivalent, complete all as specified and as directed by Engineer-in-Charge.

Supply & fixing in replacement single phasing preventer type VSP2 complete all as specified and directed. Make :- Minilec/ L&T/ Siemens/Legrand/ ABB/ C & S

Supply & fixing in replacement single phasing preventer type self powerd PMD-02 complete all as specified and directed. Make :- Minilec/ L&T/ Siemens/Legrand/ ABB/ C & S

Supply & fixing in replacement phase Sequence& protection Relay complete all as specified and directed. Make :- Minilec/ L&T/ Siemens/Legrand/ ABB/ C & S

M&L for Supply, fixing of powder coated extruded aluminum rectangular diffusers complete with black anodized extruded aluminum VCD (wherever specified), nuts, bolts, screws etc.complete as required at site all as specified and directed by engineer-in-charge.

(a) Supply air diffusers of required sizes with volume control damper.

(b) Return air diffusers of required sizes without volume control damper

Supply & Fixing of powder coated extruded aluminum lineer supply & return grilles complete with nuts, bolts, screws etc. to make the system complete, as required at site all as specified and directed by engineer-in-charge.

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