SPECIAL REPAIRS / REPLACEMENT OF E/M SERVICES AT BLDG NO P-105, PC-7, SIMULATOR - II AND III AND 2 AMTC AT AFA HYDERABAD

24TR Air-Cooled, Chilled water type unit at SDS Simulator (2 AMTC)

37TR Water cooled, Chilled water type unit at BTA Simulator-II & III

56TR Air-Cooled, Chilled water type unit at Moolgavakar Hall.

22.7TR Air-Cooled, Chilled water type unit at BTA Simulator -I (P-105 Bldg), 14AFH,WT,CRRW and C&B

Supply, install, commissioning & testing of hermetic/semi-hermetic scroll or reciprocating compressor of equal or higher efficiency/rating/capacity etc., suitable for R-407C/R-410A refrigerant and perfectly matching with the existing system including recovery of existing refrigerant using proper recovery unit and safe storage as per environmental norms, disconnecting and removal of electrical connections, suction and discharge lines, and mounting bolts, lifting, positioning, and alignment of the new compressor on vibration isolators with proper foundation bolts, reconnection of suction and discharge piping, brazing/welding with nitrogen purging to prevent oxidatio, replacement of filter drier, sight glass, and necessary accessories to ensure system cleanliness, vacuum evacuation, leak testing of the complete circuit, refilling of refrigerant gas and compressor oil as per OEM recommendations, electrical wiring, testing of control circuits and trial run of the compressor under load condition, ensuring smooth vibration-free operation and recording all operating parameters (current, pressure, temperature) incl taking down old unsv one complete all as specified and as directed & to the entire satisfaction of the Engr-In-Charge. Make : Bitzer / Danfoss / Trane.

24TR Air-Cooled, Chilled water type unit at SDS Simulator (2 AMTC)

22.7TR Air-Cooled, Chilled water type unit at BTA Simulator-I(P-105 Bldg), 14AFH, WT, CRRW and C&B

37TR water-Cooled, Chilled water type unit at BTA Simulator -II & III

56TR Air-Cooled, Chilled water type unit at Moolgavakar Hall.

24TR Air-Cooled, Chilled water type unit at SDS Simulator (2 AMTC)

22.7TR Air-Cooled, Chilled water type unit at BTA Simulator-I(P-105 Bldg), 14AFH, WT, CRRW and C&B

37TR water-Cooled, Chilled water type unit at BTA Simulator -II & III

56TR Air-Cooled, Chilled water type unit at Moolgavakar Hall.

Suitable for 24TR Air-Cooled, Chilled water type unit at SDS Simulator (2 AMTC)

Suitable for 22.7TR Air-Cooled, Chilled water type unit at BTA Simulator -I (P-105 Bldg)

Suitable for 37TR water-Cooled, Chilled water type unit at BTA Simulator -II & III

Suitable for 56TR Air-Cooled, Chilled water type unit.

Suitable for 5.5TR Packaged type Air conditioner Plant

Suitable for 8.75TR Packaged type Air conditioner Plant

Suitable for 11TR Packaged type Air conditioner Plant

24TR Air-Cooled, Chilled water type unit at SDS Simulator (2 AMTC)

22.7TR Air-Cooled, Chilled water type unit at BTA Simulator-I(P-105 Bldg), 14AFH, WT, CRRW and C&B

37TR water-Cooled, Chilled water type unit at BTA Simulator -II & III

56TR Air-Cooled, Chilled water type unit at Moolgavakar Hall.

Supply, install, commissioning & testing of thermal overload relay suitable for operation on 415V, 3-phase AC supply, compatible with the connected motor load incl taking down old unsv one complete all as specified and as directed. Make : Siemens / L&T / Schneider / ABB.

Supply, install, commissioning & testing of MCB 32 A, TP C-Curve suitable for operation on 415V, 50Hz, 3-phase + neutral AC supply, with a breaking capacity of 10 kA (minimum) and rated current incl taking down old unsv one complete all as specified and as directed. Make : Schneider / Siemens / L&T /ABB / Legrand.

Supply, install, commissioning & testing of Low Pressure (LP) and High Pressure (HP) safety cut-outs suitable for Refrigeration and Air-Conditioning systems with adjustable pressure settings, brass or stainless- steel body, compatible for R-22 / R-407 / R-410A refrigerants, and equipped with auto/manual reset feature complete all as specified and as directed. Make : Danfoss / Alco.

Supply, install, commissioning & testing of High-Precision Temperature, Pressure, and Flow Sensors suitable for Air-Cooled Chiller Systems. Sensors shall be compatible with the existing chiller make and control logic (BMS / microprocessor-based controller) and designed for use with refrigerants R-22 / R-407C / R-410A as applicable incl taking down old unsv one complete all as specified and as directed. Make : Honeywell / Johnson Controls / Siemens

Supply, install, commissioning & testing of Motorized Actuators perefectly compatible with existing Air-Cooled Chiller/Water Cooled Chiller of capacity 22.7 to 56 TR. The work includes proper alignment with existing valves, electrical connections, calibration of actuator movement, functional testing and ensuring smooth automatic operation through the chiller control system as per OEM specifications incl taking down old unsv one complete all as specified and as directed. Make : Danfoss/Siemens/Belimo.

Supply, install, commissioning & testing of Y-type Strainer of suitable size as per existing (CI/MS/Brass/SS as applicable/existing) along with & including gaskets, nuts, bolts, washers and ensuring proper alignment complete in all respects as per site requirement including isolation of pipeline, draining of water, dismantling of old unsv/damaged strainer complete all as specified and as directed. Make of Y-type Strainer : Audco / Leader / Zoloto. Make of Gasket & Fastener : Champion / Unbrako / TVS.

Supply, install, commissioning & testing of air grills, diffusers and MS colour-coated dampers perfectly matching with the existing system including dismantling and removal of old unsv ones complete all as specified and as directed.

M&L for repair and replacement of existing damaged GI ducting with new 22 Gauge (0.8 mm thick) sheet, including dismantling of old duct and supply, fabrication (hand fabricated or factory fabricated), installation at site, providing and fixing all necessary accessories such as flanges, gasket, nut bolts, cleats, angle supports, hangers, sealant, and proper alignment, complete with testing, balancing, and commissioning as per standard HVAC specifications complete all as specified and as directed.

AHU Capacity 15000 CFM at SD Simulator (2 AMTC)

AHU Capacity 11806 CFM at BTA simulator-I,14 AFH,WT&CRRW

AHU Capacity 32TR at BTA Simulator-II & III and Kiran Simulator

AHU Capacity 19TR at BTA Simulator-II & III and Kiran Simulator

AHU Capacity 7TR at BTA Simulator-II & III

AHU Capacity 6TR at BTA Simulator-II & III

AHU Capacity 4TR at BTA Simulator-II & III

AHU Capacity 22400 CFM at Moolgavkar Hall

24 TR Air Cooled, Chilled water type unit at SDS Simulator (2 AMTC)

22.7 TR Air Cooled, Chilled water type unit at BTA Simulator PC-7 (P-105 Bldg)

37 TR Water Cooled, Chilled water type unit at BTA Simulator-II & III

56 TR Air Cooled, Chilled water type unit at Moolgavakar Hall

M&L for repairs and overhauling of mono block pump sets (Chiller/Condenser pump sets) by disconnecting and taking out from position, dismantling and re-building the shaft at worn out places, machining to it’s original size, replacement of worn out bush/ball bearings, gland plates, re-conditioning the impeller and gland bushings, replacement of packing, stud bolts etc., applying insulating varnish on the stator and rotor re-winding of burnt 415 V, 3 Phase motors of following capacities with new super enameled copper wire of same gauge and same number of turns as existing, drying up and re-assembling the pump set, installing at it’s original location, connecting up all connections, testing and commissioning complete all as specified and as directed for the following capacities :-

Upto 3.0 HP

Upto 3.0 HP

M&L for servicing/overhauling to Central type AC Plant cleaning of condenser and evaporator coils with approved chemical agents, inspection of compressors, fan motors, and , checking of refrigerant pressures and topping up (if required), cleaning and flushing of strainers and filters, inspection of expansion valves and sensors, testing of safety and control circuits, lubrication of moving parts, and recording of suction/discharge pressures and operating temperatures of chiller units, evaporator coolers, blowing out the dust, rectifying the minor problems, checking of interlock of safety/control devices (LP/HP cut outs & sensors), checking all electrical & electronic connections of PCB/Displays of mother boards, Relays, SPP, PV, Timers,contactors, MCCB/MCBs etc in unit & panels, water pipe line leakages, general cleaning of whole plant, servicing of chiller & condencer pumps,humidifier pumps any capacity/model/make/type and replacement of gland packing in pumps, plant as per existing specification of the following capacities of Central type AC plants complete all as specified and as directed for the following capacities :-

Water cooled, Chilled water type 37 TR Capacity at BTA Simulator II &III

Water cooled, Chilled water type 40 TR Capacity at Kiran Simulator

Air cooled, Chilled water type 56 TR Capacity at Moolgavkar Hall

Air cooled, Chilled water type 22.7 TR Capacity at BTA Simulator I, 14 AFH, WT, CRRW and C&B Hall

Air cooled, Chilled water type 24 TR Capacity at SDS Simulator (2 AMTC)

Supply, installation and commissioning of Nitrile Rubber Insulation of 9 mm thickness with UV-Resistant Aluminum Foil facing to prevent heat gain, condensation and degradation due to solar exposure including dismantling and removal of old or damaged nitrile rubber insulation from ducting exposed to sunlight as per standard HVAC specifications complete all as specified and as directed.

M&L for carrying out R-410A / R-407C / R-134a gas (refrigerant) top-up for Air-Cooled Chiller system to restore normal operating pressure and cooling performance. The work includes checking for refrigerant leakage, rectification of minor leaks (if any), vacuuming of the system, charging with the required refrigerant gas, testing for correct operating parameters such as suction/discharge pressures and super heat, and ensuring stable system performance as per OEM specifications complete all as specified and as directed. Make : DuPont / Honeywell / SRF / or techno-commercially equivalent.

S&F Contactor, AC 3 Ph, MNX type & of current rating 9 to 40 Amps, Coil voltage 415 V AC, 50Hz incl necessary fixing & electrical connection arrangements & testing incl taking down old unsv one complete all as specified and as directed. Make : L&T/ABB/SIEMENS/LEGRAND.

Supply, installation, commissioning & testing of pressure gauges (low pressure and high pressure) suitable for chiller plant refrigerant and water systems.The work includes dismantling of defective gauges (if any), providing new industrial-grade bourdon-type pressure gauges of appropriate pressure range, dial size minimum 100 mm, with stainless steel casing, brass/s.s. connection, and 1/4" or 1/2" BSP male thread as applicable.The gauges shall be properly mounted on existing pressure tapping points using isolating valves, with PTFE sealing, leak testing, and calibration for accurate pressure indication complete all as specified and as directed. Make : WIKA / H-GURU / Fiebig. Pressure Range (typical) : Low Pressure Gauge: 0 to 10 bar (or as per system design/reqmt) High Pressure Gauge: 0 to 25 bar (or as per system design/reqmt)

Supply, installation, commissioning & testing of 50 mm to 63 mm Butterfly Valve suitable for chilled water pipeline, designed for operation at PN 16 pressure rating (or as specified) complete all as specified and as directed. Make : Zoloto Advance/Kirloskar/Audco/L&T

Supply, install, commissioning & testing of UL-Certified Fire Damper (GI construction) with Motorized Actuator (Belimo Make, 230V Spring return type) including necessary accessories and mounting frame incl taking down old unsv one complete all as specified and as directed.

Supply, install, commissioning & testing of Finned Strip Heater Bank 20 KW capacity with control panel fixing inside the duct fixed on insulators for each AHU all as per existing Make/Model & as per site requirement incl testing & taking down old unsv one complete all as specified and as directed. Make : Danfoss or techno-commercially equivalent.

Supply, installation, commissioning & testing of new SMPS controller for Voltas Water-Cooled Chiller including complete rewiring of the Chiller panel board. The work includes proper termination of all control and power connections, cable dressing, functional testing, and ensuring reliable operation of the chiller system in accordance with OEM standards complete all as specified and as directed.

Supply, install, commissioning & testing of HMI display for 3 x 37 TR Water Cooled Chiller unit perfectly compatible with existing chiller plant panel. All work shall be carried out in accordance with relevant standards incl taking down old unsv one complete all as specified and as directed. Make : Voltas (As per existing) NOTE : Work includes (i) Proper wiring, connections, and configuration as per OEM guidelines. (ii) Functional testing to verify all control sequences, sensors, and actuators operate correctly post-replacement. (iii) Ensuring compliance with system operational parameters and commissioning to full functional status.

M&L for removal of existing compressor oil from Air Cooled/Water Cooled chilled water and refilling with new OEM-approved Refrigeration Compressor Oil, including cleaning of oil sump, strainers and pipelines, checking oil level and system performance as per OEM standards complete all as specified and as directed.

M&L for Servicing of FRP Cooling Towers of Water Cooled Central AC Plants of Simulator Complex-South & North PC-7 MK-II and Kiran Simulator by disconnecting all connections, thorough cleaning of FRP Casing Header, replacement of rusted nuts, bolts, washers and greasing/oiling of fan motor and fan bushes/bearing, checking fan assembly, out-let connections, arresting leakage of all joints by applying FRP compound and replacement of existing perished filter screen of PVC fills complete all as specified and as directed.

Supply, install, commissioning & testing of Filter Drier suitable for air-cooled chiller refrigerant circuit, compatible with refrigerant type R-410A / R-407C / R-134a (as applicable).The work includes dismantling of the defective or choked filter drier, supply and brazing/welding of a new filter drier of appropriate capacity and connection, leak testing using nitrogen, vacuuming, and recharging of refrigerant gas as required. The filter drier shall be of copper or steel shell type, containing molecular sieve and desiccant material, suitable for removal of moisture, acid, and contaminants from the refrigerant system to ensure efficient chiller operation. All work shall be carried out as per OEM recommendations and good refrigeration practices complete all as specified and as directed. Make : Danfoss / Alco / Sporlan / Emerson

M&L for carrying out general servicing and preventive maintenance of Package Air-Conditioning Units of various capacities, including thorough cleaning, inspection, testing, and operational checks to ensure optimum performance and reliability of the system complete all as specified and as directed & to the entire satisfaction of the Engr-In-Charge. The work includes : (i) Cleaning of condenser and evaporator coils using coil cleaner chemicals and water jet. (ii) Cleaning and washing of air filters and replacement if found damaged. (iii) Checking and tightening of electrical connections, terminals, and control wiring. (iv) Inspection of compressor health, current, and operating parameters. (v) Lubrication of motor bearings and blower fans. (vi) Checking and cleaning of drain tray and condensate line to prevent clogging. (vii) Inspection and calibration of thermostats, sensors, relays, and contactors. (viii) Checking and topping up refrigerant gas as required at site. (ix) Checking airflow, vibration, and noise levels for smooth operation. (x) Final testing and commissioning of the unit to ensure satisfactory performance. (xi) All works shall be carried out using standard tools and in accordance with OEM recommendations and safety procedures.

Set of 1 x 5.5 TR Capacity

Set of 2 x 5.5 TR Capacity

Set of 3 x 5.5 TR Capacity

Set of 2 x 8.75 TR Capacity

Set of 3 x 8.75 TR Capacity

Set of 3 x 11.0 TR Capacity

Set of 6 x 11.0 TR Capacity

5.5 TR package type unit.

8.75TR package type unit.

11.0TR package type unit.

5.5 TR package type unit.

8.75TR package type unit.

11.0TR package type unit.

Supply, install, commissioning & testing of Hermetically/Semi-hermetically Sealed Compressor of same/higher capacity and specifications as per existing system suitable for Package Air-Conditioning Unit (Voltas/Blue Star/Equivalent), refrigerant recovery, brazing/welding of suction and discharge lines, vacuuming, gas charging (R-22 / R-407C / R-410A as applicable), performance checking complete in all respects as per OEM standards incl taking down old unsv one Replacement of defective compressor suitable for package air-conditioning unit (Voltas / Blue Star / Equivalent) incl taking down old unsv one complete all as specified and as directed. Make : Bitzer / Danfoss / Trane.

5.5 TR package type unit.

8.75TR package type unit.

11.0TR package type unit.

M&L for replacement of damaged / leaking condenser coil suitable for 5.5 TR Package Air-Conditioning Unit (Voltas / Blue Star / Equivalent) including dismantling of existing coil, supply of new Copper Tube–Aluminium Fin Condenser Coil of same size and configuration, installation with proper alignment, brazing of refrigerant connections, nitrogen pressure testing, vacuuming, gas charging (R-22 / R-407C / R-410A as applicable) and performance testing. Work includes all materials, fittings, consumables, tools, and labour complete in all respects as per OEM standards complete all as specified and as directed. Makes: Voltas / Blue Star

5.5 TR package type unit.

8.75TR package type unit.

11.0TR package type unit.

Supply, installation, commissioning & testing of Printed Circuit Board (PCB) suitable for Packaged Air Conditioning System. The work includes dismantling of defective PCB, supply of a new OEM-Compatible Control PCB, proper mounting in the control panel, connection of existing wiring and connectors, ensuring correct polarity and signal alignment, followed by power-on testing, calibration, and verification of communication with sensors, actuators, and display modules. All programming, parameter settings, and configuration shall be carried out as per manufacturer’s specifications to restore full automatic functionality of the chiller unit complete all as specified and as directed. Make : Carrier / Blue Star/Voltas perfectly compatible with the existing model/make/type.

5.5 TR package type unit.

8.75TR package type unit.

11.0TR package type unit.

Supply, install, commissioning & testing of Blower Assembly, including fan wheel, shaft, and housing as per OEM standards/specifications including dismantling and removal of the existing defective blower assembly from the Package Air-Conditioning unit complete all as specified and as directed. The work includes : (i) Disconnection of electrical supply and removal of motor, fan and drive components (belt/shaft as applicable). (ii) Removal of old blower assembly along with supporting mounts and alignment brackets. (iii) Alignment and coupling of blower with motor, including belt/pulley alignment if applicable. (iv) Electrical connections and verification of motor rotation direction. (v) Trial run and performance testing, including airflow, vibration and noise check. (vi) Lubrication of bearings and inspection of all moving parts to ensure smooth operation. (vii) All work shall be carried out by qualified HVAC technicians using approved tools and in accordance with OEM standards and safety procedures. Make : Fenner / PIX / Dunlop / Gates.

5.5 TR Package type unit.

8.75 TR Package type unit.

11.0 TR Package type unit.

M&L for dismantling and removal of the existing defective expansion valve and supply, installation, commissioning & testing of OEM-Compatible Thermal or Electronic Expansion Valve suitable for a Package Air-Conditioning unit complete all as specified and as directed. Makes : Danfoss / Sporlan / Emerson The work includes : (i) Removal of the old expansion valve from the refrigerant line. (ii) Supply and installation of new expansion valve compatible with the unit’s refrigerant type (R-407C / R-410A / R-134a). (iii) Proper connection of capillary or sensing bulb (for thermal expansion valve) and torque-tight fitting on the liquid line. (iv) Leak testing, vacuum evacuation and nitrogen purging of the refrigeration circuit. (v) Refilling of refrigerant and oil top-up if required as per OEM specifications. (vi) Functional testing of the system to ensure correct superheat, subcooling, and stable cooling operation. (vii) All work shall be performed by qualified HVAC technicians following OEM standards and safety procedures.

24TR Air-Cooled, Chilled water type unit at SDS Simulator (2 AMTC)

22.7TR Air-Cooled, Chilled water type unit at BTA Simulator-I(P-105 Bldg), 14AFH, WT, CRRW and C&B

37TR water-Cooled, Chilled water type unit at BTA Simulator -II & III

56TR Air-Cooled, Chilled water type unit at Moolgavakar Hall.

M&L for taking down old unsv Hand Shut Off Valve any type/size & S&F Hand Shut Off Valve (brass) from the refrigerant line after cutting the liquid line and of following sizes/type with necessary welding/brazing etc. incl testing complete all as specified and as directed.

Hand shutt off valve 15/8" dia Make : Danfoss, Model : Danfoss GBC 42S

Hand shutt off valve 5/8" dia Make : Danfoss, Model : Danfoss GBC 16S

Hand shutt off valve 3/8" dia Make : Danfoss, Model : Danfoss GBC 12S

Hand shutt off valve 1/2" dia Make : Danfoss, Model : Danfoss GBC 10S

S&F Digital Hygrometer for temperature and humidity sensors metering sytem wall mounted suitable for Central AC plant AHU Room including fixing on wall with necessary electrical/mechanical connections & testing including taking down the old unserviceable one complete all as specified and as directed. Model : OSR MEDPLUS

S&F Air Filters as per existing type/size/grade of the following sizes for the AHU incl testing complete all as specified and as directed.

600 x 600 x 45 mm with 10 Micron

600 x 300 x 45 mm with 10 Micron

Supply, Installation, Commissioning and Testing of air terminal system of Collection Volume Method (CVM) with the following accessories :

Dynasphere lightning conductor stainless steel as per IEC 61024. The Air terminal shall be placed using the " Collection Volume Method / Field Intensification Method" placement methodology as specified in IEEE‐998. Make ERICO Cat Part No: D/SMKIVSS or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed b& to the entire satisfaction of the Engr-in-Charge. Brief features/ specifications of the same is as follows: aa) Impulse Tested, atleast for 40 KA both +ve and -ve , 8/20 micro-second, resistance between the terminal tip and the sphere should be minimum 10 MΩ before and after the test. ab) Free from Corona effect. ac) Trigger an upward streamer when there is a downward stream. ad) The dome must be insulated from the rod but connected to ground via a dynamic variable impedance. ae) The center grounded electrode tip shall be at least 20mm diameter. af) The terminal must be isolated from the structure using an insulated support mast making an isolated lightning protection system. ag) Air terminal should not be dependent upon batteries or external power supplies for any part of its operation. ah) Streamer Emission should not be ESE type.

5m elevation pole made of AL(aluminium) Mast with a dia of 60mm with a M20 thread at the top to fix the unit. Make ERICO Cat Part No: ALU-5M or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed.

Air terminal Adaptor made up of Brass/SS for the connectivity of Air terminal & the Mast, with suitable terminal clamp made up of SS. Make ERICO Cat Part No: INTCPT-ADM3/4UNC or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed.

Base/ side Bracket to hold the Air terminal mast with suitable fixing accessories, Guy wire support and all required fixing equipment's. Make ERICO Cat Part No: IGUYKIT4MGRIP or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed.

S & F 2 runs of 8 mm Copper Bonded Steel Round Conductor, minimum copper bonding shall be 254 microns having continuous coin form, the conductor core shall consist of low-carbon steel grade for improved flexibility. The copper surface of the conductor should provide high conductivity and corrosion resistance properties, well‐suited as a lightning protection conductor in accordance with IEC 62305‐3 Edition 2.0 standard. The conductor should be certified by UL & IEC 62561-1. The life of CSBS Conductor should be 30 Years. The Cat Part Number & compliance markings should be stamped directly on the conductor at every meter. Make : ERICO Cat Part No: CBSC - 8MM or techno-commercially equivalent of SEIMENS / HARGER complete all as specified and as directed. Note: 2 runs of 8 mm Copper Bonded Steel Conductor shall be measured and paid as one unit length.

S & F Clamp Holder made up of 304 grade SS with SS bolt and nut at every 1 m distance of round conductor. The clamp should be suitable for double run of Copper bonded Steel round conductor size of 8-mm. Make: ERICO Cat Part No: CBSC-8 SADDLE or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed.

Supply, Installation, Commissioning and Testing of Maintenance Free Radial Earthing system comprising of the following :-

Copper Bonded Steel Earth Rod of size 5 feet x 5/8 inch diameter of 4 Nos, earthing system required minimum excavation of 100 mm width x 150 mm depth x 5000 mm length in square pattern Mat Radials which should be 10 meters apart, Auger 4 Nos hole of diameter 4 inch and 5 feet depth in the soil, placing the Earth rods in to the augured hole, hammering the rods to 1 feet depth, Readymade FRP Heavy duty earth chamber (450 mm x 450 mm), Top Cover with minimum 25 ton load bearing capacity, removing excavated material. Make : ERICO Cat Part No: CODE74071020 or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed. Brief features/ specifications of CBSE Rod is as follows : aa) The outer surface must be molecularly bonded with uniform layer of 250 micron Copper, 99.9% pure electrolytic copper coating. ab) Nickel interface must be provided between the copper and steel to avoid the galvanic corrosion. ac) Must be capable of withstanding fusing current of 20 KA. ad) Earth rod must be in compliance with IEC 62305- 2. ae) Tensile strength greater than 80000 PSI on 12 mm. af) High resistance to corrosion.

Ground Enhancement Material (GEM) , Per Bag -11.33 Kgs, Conforming to IEC 62561-7 Standard, Premixing the GEM into slurry form using water (not more than 5 L to 6 L per bag), Pouring the GEM mixture in the augured hole and filling. Make: ERICO Cat Part No: GEM 25A- 25-1lb or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed. Brief features/ specifications of the same is as follows: ba) Must be carbon based superior conductive material. bb) Resistivity must be less than 2 Ω-cm. bc) Must not cause corrosion to copper when in contact. bd) Must not expand or experience any shrinkage once set. be) Must not depend on the continuous presence of water / moisture / salt to maintain its conductivity. bf) Must not decompose or leach out with time. bg) Must not contain hazardous chemicals as per IEC 62561-7 standard. bh) Flexural and possess compressive strength as per relevant standard. bj) Sulphur content must be less than 2%.

Cadweld Materials for Connections between Ground Rod with CBSC conductor by Exothermic reaction. Connections to be made with a semi-permanent graphite mould, which shall hold the conductors to be welded. Weld metal must be a mixture of copper oxide and aluminium. Make : ERICO Cat Part No: 150 PLUS F20 or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed.

8 mm Copper Bonded Steel Round Conductor, minimum copper bonding shall be 254 microns having continuous coin form, the conductor core consists of a low-carbon steel grade for improved flexibility. The copper surface of the conductor should provide high conductivity and corrosion resistance properties, well‐suited as a lightning protection conductor in accordance with the IEC 62305‐3 Edition 2.0 standard. Including excavation depth 30 cm for laying round conductor, removing excavated material, return filling. Make : ERICO Cat Part No: CBSC - 8MM or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed.

S&F Lightning Event Counter, Installed on down conductor, Non resettable mechanical counter, Non electronic without battery or external power source, IP67 enclosure, Triggering impulse < 2 KA, 8/20 micro second, Warning sticker should be provided near to the Down conductor in a visible place. Make : ERICO Cat Part No: LEC-IV or techno-commercially equivalent of SEIMENS/ HARGER complete all as specified and as directed.

Supply, Installation, Commisioning and testing of Maintenance free Chemical Earthing system comprising of the following :-

Copper Bonded Steel Earth Rod of 3 Mtr length & 14.2 mm diameter, augering a hole of diameter 3 inch & 9 feet in depth into the soil, placing the Earth rod into the augered hole, hammering the rod to further 1 feet depth, removing excavated materials. Make : ERICO, Cat No : CODE615800A complete all as specified and as directed. Brief features/specifications of CBSE Rod is as follows :- (a) The outer surface must be molecularly bonded with uniform layer of 250 micron copper, 99.9% pure electrolyte copper coating. (b) Nickel interface must be provided between copper and steel electrode to avoid the galvanic corrosion. (c) Must be capable of withstanding fusing current 20KA @ 1 Sec. (d) Earth rod must be in compliance with IEC 62305-2, NBC-2016 & IEEE 80. (e) Tensile Strength greater than 80000 PSI on 12mm. (f) High resistance to corrosion. (g) Material category number shall be listed in UL site. (h) Rod shall be tested as per IEC 62561-2 standard in compliance with IEC-62305 standard. (j) Manufacturer Make, Cat Part No & UL Markings must be printed on each Rod.

Ground Enhancement Material (GEM) per bag 11.33 Kgs, Confirming to IEC 62561-7 Standard, Premixing the GEM into slurry form using water (not more than 5 to 6 Ltrs per bag). Pouring the GEM mixture in the augured hole and filling. Make : ERICO, Cat No : GEM 25A-25-1 lb or techno-commercially eqvt of Siemens/Harger complete all as specified and as directed. Brief features/specifications of the same is as follows :- (a) Must be carbon based superior conductive material. (b) Resistivity must be less than 2 ohm-cm. (c) Must not cause corrosion to copper when in contact. (d) Must not expand or experiance any shrinkage once set. (e) Must not depend on continuous presence of water/moisture/salt to maintain conductivity. (f) Must not decompose/leach with time. (g) Must not contain hazardous chemicals as per IEC 62561-7. (h) Flexural and possess compressive strength as per relevant standard. (j) Sulphur content must be less than 2%. (k) TCLP Test shall be conducted on the material. (l) Material shall be inline with relevant clause/para of IEEE 80. (m) Corrosion test shall be conducted on the material under both aggressive & non-aggressive conditions. (n) Installation instructions & Material Data Sheet should be printed in each package.

Single run of 10 mm Copper Bonded Steel Round conductor, minimum copper bonding shall be 254 microns having continuous coin form, the conductor core consisting of low carbon steel grade for improved flexibility. The copper surface of the conductor should provide high conductivity and corrosion resistance properties, well-suited as a lightning protection conductor in accordance with IEC 62305-3 & tested as per IEC 62561-2:2012 including excavation depth 50cm for laying round conductor, removing excavated material, return filling &/or fixing with holders made up of 304 grade SS with SS bolt and nut at every 1 m distance of round conductor. The clamp should be suitable for Single run of Copper bonded Steel round conductor size of 10 mm. Make of Conductor : ERICO, Cat Part No: CBSC - 10 mm or techno-commercially eqvt of Siemens/Harger. Make of Saddle : ERICO, Cat Part No : CBSC-10 SADDLE or techno-commercially eqvt of Siemens/Harger complete all as specified and as directed.

Readymade FRP Heavy Duty Chamber of dimensions 450 mm x 450 mm x 450 mm with suitable cover. The chamber must be extended from ground 150 mm with minimum 5 ton load bearing capacity, marking each earth resistance value with Aluminium Name Plate. Make ERICO or techno-commercially eqvt of Siemens/Harger complete all as specified and as directed.

Cadweld materials for connections between Ground Rod with CBSC conductor by Exothermic reaction, connections to be made with semi-permanent graphite mould, which shall hold the conductors to be welded. Weld metal must be a mixture of copper oxide and aluminium, should be compliant with IEEE 80 standards & tested as per IEEE 837-2014 standard. Make : ERICO, Cat No : 150 PLUS F20 or techno-commercially eqvt of Siemens/Harger complete all as specified and as directed.

Common Bus-Bar 250 x 50 x 3 mm for earth connection with suitable base clamps & insulators, providing DD universal pattern for 08 Nos of holes for connections complete all as specified and as directed. Make: ERICO or techno-commercially eqvt of Siemens/Harger.

Taking down old unsv/damaged earthings incl connected items incl making good the disturbed surfaces incl finishing the surfaces even & smooth & matching to the existing/original surfaces complete all as specified and as directed.

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