SPECIAL REPAIR TO AIR CONDITIONING PLANT OF WSA AT 1 WG AF

Amount

1. Design, Supply, Installation, Testing and Commissioning of water cooled scroll chiller of capacity not less than 35 TR having eco friendly refrigerant R-410A with Inverter driver technology having COP 4.4 which are equipped with intermediate discharge valve and a variable frequency drive with microprocessor controller, with multiple scroll compressors, with suitable TEFC motor, water cooled condenser, evaporater, suction, discharge shut off valves, ressure switches, refrigerant piping, base frame, insulation, controls, vibration isolators, automatic capacity control systems if applicable, oil pump, drive package, strainers, and refrigerant throttling device to suit the chiller all as specified and/ or directed etc., complete. The capacity of water chilling package unit shall not be less than 35TR at the following specified conditions. Chilled water inlet temperature: 54 ° F, Chilled water outlet temperature 44 ° F, Condenser water inlet temperature: 85 ° F, Condenser water outlet temperature: 95 ° F, Evaporater fouling factor: 0.0001 Sq ft Hr F/ Btu in FPS units, Condenser fouling factor: 0.00025 Sq ft Hr ° F/ Btu in FPS units. RCC / Cement concrete foundation for the unit as per OEM recommendation. Chilling machines as described above Note : - The machine shall be taken inside in CKD condition so as to not to damage the existing building. Any temporary removal of any Door/Window/Tiles/Floor etc. item shall be made good in original condition by the contractor.

Primary Chilled water pump Supplying, installing, testing and commissioning of CENTRIFUGAL SPLIT CASING / END SUCTION PUMPS, factory mounted on a common base with electric motor for recirculation of water for the central air conditioning system. End suction, vertical split case design, in cast iron bronze fitted construction specifically designed for quiet operation for chilled water cooling systems as directed by Engineer-in-Charge. All pumps shall be provided with mechanical seal and aligned properly as required. The pump motor shall be suitable for 415 +1-10% volts, 50 cycles, 3 phase power supply. The quoted price shall include cost of thermal insulation and cladding of chilled water pumps. Secondary chilled water pumps shall be suitable for operation on Adjustable frequency drives. Pumps with performance characteristics as given below. 1 No Monobloc type pump 1 No. Suitable HP, TEFC squirrel cage induction motor with class 'F' insulation, 2900 rpm , operating on 415 +/- 10% volts, 3 phase, 50 Hz A.C. supply. Lot - Expended Polystyrene (TF quantity) insulation not less than 50mm thick duly cladded between aluminum sheets of 0.5mm thickness and properly clamped to pump in two semicircular sections as per specifications. 2 EACH. - 150 mm dia. dial type pressure gauges. Lot - Mounting frame with Anti vibration pads. Lot - RCC/cement concrete foundation for the pump unit. Operating parameters Water flow rate = 204 USGPM Head = 65ft ot 20 Mtr. Motor HP = 10.0 HP (Suggested) Quantity ( 1 W 1 S)

Secondary Chilled water pump Supply, installing, testing and commissioning of Secondary Variable Speed Pumping System consisting of adjustable frequency drive (AFD) for each pump. 1 No. microprocessor based pump controller per zone housed within the enclosure of one of the AFD with pumping software duly downloaded & single / multiple differential pressure sensor / transmitters as per the site requirement. The entire system along with secondary pumps must be sourced from pumping system supplier only, for unit responsibility. Secondary chilled water pumps comprising of the following The system shall be complete in all respects and suitable for following ratings. . 2 no. split casing type pump. 2 No. Suitable HP, TEFC squirrel cage induction motor with class 'F' insulation, 1450 rpm, operating on 415 +/- 10% volts, 3 phase, 50 Hz A.C. supply. Lot - Expended Polystyrene (TF quantity) insulation not less than 50mm thick duly cladded between aluminum sheets of 0.5mm thickness and properly clamped to pump in two semicircular sections as per specifications. 4 EACH. - 150 mm dia dial type pressure gauges. Lot - Mounting frame with Anti vibration pads. Lot - RCC/cement concrete foundation for the pump unit. 1 Lot Microprocessor based BMS compatible, variable frequency speed controller complete with necessary fittings and wiring 1 Lot Controllers suitable to control 2 EACH. pumps separately Lot -Sensor / Transformer Water flow rate for each pump : 204 USGPM Head : 65 feet /20 Mtr. Motor HP : 10 HP (Suggested) (1 No. standby pump included in above quantity) Qty ( Lot includes 2 pumps and 1 controller) Note: All, pumps, Motors, VFD, controller and software etc are to be sourced from the same vendor. All VFD shall have separate controller. The VFD shall not behave in master and slave format.

Condenser water pumps 1 no. split casing type pump. 1 No. Suitable HP, squirrel cage induction motor with class 'F' insulation, 1450 rpm, operating on 415 +/- 10% volts, 3 phase, 50 Hz A.C. supply. 2 EACH. - 150 mm dia. dial type pressure gauges. Lot - Mounting frame with Anti vibration pads. Lot - RCC/cement concrete foundation for the pump unit. Operating parameters Water flow rate = 140 USGPM Head = 65 Ft. of water /20 Mtr. Motor HP = 10 HP (Suggested) Quantity indicated includes one standby Quantity

Supply, Installation, testing and commissioning of factory built floor mounted double skin type air handling units made of 23+/-2 mm thick panels consisting of G.I. Casing of thickness 0.6 mm outside layer 0.6 mm thickness inside layer with polyurethane foam (PUF) insulation of density not less than 38 Kg/Cum factory injected between them by injection molding machine complete with 6 row deep cooling coil with aluminum finned copper tubes, filter sections with 50 mm thick metal washable synthetic type air pre-filters, belt drive package with TEFC drive motor suitable for 415+ 10% volts, 50 HZ, 3 Phase, A.C. supply, drain connections, stainless steel drain pan, necessary vibration isolation arrangement, foundations, etc. complete as per specifications and of following capacities. The AHU shall be capable of Delivering 10000 CFM at 65 mm static,with Pre filters section, cooling coil, backward curved blower. The cost of distributers shall be part of the AHU. All coils for Air handling units shall be 120% capacity of the capacity indicated. Additional rows if required shall be provided at no extra cost. Note:-(i) Temperature logger which shows the inside and outside conditions including RH with minimum 1 month memory data of (temp & RH) will be installed in each AHU room.

Supply, installation, testing and commissioning of 3-way motorized valves suitable for Chilled water as well as hot water application complete with Electrical / Electronic actuator, necessary wiring and required accessories for proper operation and control of valves of 80mm diameter size including Modulating Thermostat with control wiring etc. as per specification.

Supply of HVAC dedicated VFDs of capacity 10HP with IP 55 enclosures with Mains disconnect, complying with the tender specifications and having: (a) Built-in dual 5% impedance DC link reactor (harmonic filters) on the positive and negative rails of the DC bus of the VFD. (b) Built-in EMC Filters (electromagnetic compatibility filters) for VFDs for restriction of conducted emissions to comply with IEC61800: 3 (unrestricted distribution):2004 Category C 3. (c) Three-feedback PID controller having capability to simultaneously accept 3 feedback signals from temperature sensors or pressure sensors for process optimization and accordingly regulate the speed of the AHUs. (d) Additional 3 PID controllers to control external devices such as chilled water modulating valve, fresh air damper, etc. thus reducing the number of I/Os in DDC Controllers & improving system reliability. (e) Automatic Energy Optimization / Load dependent flux optimization functionality for maximum energy savings. (f) MODBUS RTU as the communication protocol between BMS & VFDs. (g) VFDs not meeting above requirements shall provide external disconnect, external harmonic filters, additional external EMC Filters to comply with IEC61800: 3 (unrestricted distribution):2004 Category C 3, external PLCs / DDCs to achieve 3 Feedback PID Controller functionality and external devices controlling capabilities. (h) The VFD cost shall include suitable PID controller for regulating the flow of air by controlling the frequency of VFD.

Supplying, installation, testing and commissioning of electrical HW generator of capacity note less than 45KW equipped with sufficient number of electrical immersion heaters. The pressure vessel shall be constructed as per ASME standards and insulated on all sides with 100 mm thick fiber glass and cladded with 0.80 mm aluminum sheet in a neat and clean manner. The generator shall be equipped with all automatic and safety controls such as manual reset high temperature water outlet, step controller and recycling relay, 'ON' 'OFF' switch thermostats, pilot light, low water cutoff and other controls as per manufacturers recommendations. All basic controls and terminals shall be located in an integral control cabinet factory wired and tested. The generator shall be suitable for 415 +/- 10% volts, 50 cycle, 3 phase power supply. The entire generator shall be factory assembled and tested at 350 PSI pressure. The Hot Water Generator shall be of following capacity made of 8 mm MS sheet and dish end made of 10 mm capacity of the capacity indicated. Additional rows if required shall be provided at no extra cost. Hr o F/Btu in FPS units. RCC/cement concrete foundationfor the unit as per OEM recommendation. Chilling machines as described above Note :- The machine shall be taken inside in CKD condition so as to not to damage the existing building. Any temporary

Factory wired Winter Heating package comprising of strip heater of capacity 45KW, MS frame duly painted, Humidistat, Thermostat, Internal wiring within the bank and complete as per instructions of engineer in charge of following capacity. (Heater Battery)

Supply, Installation,Testing and commissioning of 1000 Litre INSULATED PRESSURISED CLOSED WATER EXPANSION TANK suitable for total volume of water in chilled water circuit along with necessary accessories such as 2 EACH pumps (1working +1standby) with Pressure Transmitter and interconnecting Pipe & Isolating Valve. The tank shall be pre-charged.Expansion tank Shall be with replaceable heavy duty butyl rubber bladder. The tank shall have 50 MM system connection and 20 mm drain and charging valve connection to facilitate the on site charging of nitrogen in the tank. The tank shall be fitted with lifting rings and a floor mounting skirt for vertical installation. The tank must be constructed in accordance with IS-STANDARD 2825-1969 suitable for 125 PSI working pressure. The complete system shall be sourced from single manufacturer and supplied and installed with all accessories and safety fixtures required for proper functioning of the complete hydronic system. Chilled water closed vessel pressurized expansion tank as described above shall be duly insulated with 50 mm thick EPS insulating material and cladded with aluminum Sheet (20G) as specified.and as mentioned in the drawings and specifications.

Supply Installation Testing and commissioning of MS pan type Humidifier with controls, immersion type heaters of capacity 3.5 KW controls and humidistat, foundation etc.

MS Condensing Water Pipe Supply, fixing in position, testing and commissioning of the following over ground MS class ‘C’ pipes of following diameter cut to required lengths and installed with all welded joints, complete with the necessary fittings like elbows, tees and reducers, sockets etc. excluding valves for condenser water lines. Note: MS pipe upto 150 mm dia shall be 'C' class as per BIS 1239 Part-I. All pipes above 150mm dia shall be MS factory rolled having following wall thickness. (ii) Mounting arrangement of pipes on brick/PCC block/MS angle iron is included under this item. (a) 150 mm dia MS pipes

(b) 100 mm dia MS pipes

(c) 65 mm dia MS pipes

(d) 50 mm dia MS pipes

Supplying, fixing, testing and commissioning of Butterfly Valves as per specification. (a) 150 mm dia valves.

(b) 100 mm dia valves.

(c) 65 mm dia Valves.

(d) 50 mm dia Valves.

Supplying, fixing, testing and commissioning of Balancing 100mm dia Valves as per specification.

Supplying, fixing, testing and commissioning of Check Valves of size 100mm dia as per specification.

Supplying, fixing, testing and commissioning of Y-Strainer 100 mm dia valves as per specification.

Supply, fixing in position, testing and commissioning of the following Over Ground/ Under Ground MS class ‘C’ pipes of following diameter cut to required lengths and installed with all welded joints, complete with the necessary fittings like elbows, tees and reducers, sockets etc. excluding valves for Chilled / Hot water lines but including insulation as per specifications. Note:- Mounting arrangement of pipes on brick/PCC block/MS angle iron is included under this item. (a) 125 mm dia MS pipes

(b) 100 mm dia MS pipes

(c ) 80 mm dia MS pipes

(d) 65 mm dia MS pipes

(e ) 50 mm dia MS pipes Note:- Excavation will be paid seprately.

Supply and fixing in position the following butterfly valves duly insulated as per specifications. (a) 125 mm dia Valves.

(b) 100 mm dia Valves.

(c ) 80 mm dia Valves.

(d) 65 mm dia Valves.

(e ) 50 mm dia MS Valves.

Supply and fixing in position following balancing valves 80mm dia duly insulated as per specifications.

Supply and fixing in position following Check valves 80mm dia duly insulated as per specifications.

Supply and fixing in position following Y strainers valves of size 80mm dia duly insulated as per specifications.

Supplying, installation, testing and commissioning of Auto air vents.

Supply and fixing in position the industrial type pressure gauges with gun metal ball valves.

Supply and fixing in position the mercury-in- glass industrial type thermometers.

Supply and fixing in position the following CPVC heavy grade 32mm dia pipes min 3 mm thick pipes cut to required lengths and installed with all screwed joints with the necessary elbows, tees and reducers etc as per specifications.

AIR DISTRIBUTION Supply, Installation, Testing and Commissioning of site fabricated galvanised steel sheet (GSS) ducting as per the relevant IS of following thickness including necessary supports, adjustable dampers, vanes, etc complete as per specifications. (a) 24 gauge galvanised sheet steel

(b) 22 gauge galvanised sheet steel

(c ) 20 gauge galvanised sheet steel

Supply, fabrication, installation and testing the flexible connections constructed of fire resistance flexible double canvas sleeve as per the approved shop drawings.

Supply, installation and testing of GI construction Louver dampers within ducts to be provided with suitable ducts lever and quadrants for manual control of volume of air flow and for proper balancing of the air distribution system.

Fire Damper with Control Mechanism Fire Damper Supplying, fixing, testing and commissioning of motor actuated Fire Dampers of at least 1.5 hour fire rating in supply air duct at wall crossing of AHU room/as and where required, of requires sizes including control wiring. The damper shall be motorized and spring return so as to close the damper in the event of a fire signal which shall be provided by smoke sensor/detector in AHU room as per specifications and as required. The spring return action shall be in-built mechanism and not externally mounted. The control wiring shall be interlocked ion such a way that along with actuation of damper-closing mechanism, the AHU fan motor gets automatically switched off. Fire damper as described above, as per specifications and complete in all respects.

Electric actuator with necessary linkage to actuate fire dampers complete with required wiring and associated accessories. Note: Fire dampers shall be supplied with sensors/actuators/control etc duly factory fitted and tested at manufacturers works and certificate to this effect produced along with delivery of fire damper.

Supply, Installation, Testing and Balancing of Powder coated extruded aluminum construction Linear Grilles with removable core as per approved drawings and specifications. Quoted price shall be without volume control damper at the location of supply air collar

Supply, installation, testing and balancing of powder coated extruded aluminum square shape ceiling diffusers with removable core and anti smudge ring as per specifications. Quoted price shall be without volume control damper at the location of supply air collar

Supplying & fixing of opposed blade aluminum construction volume control dampers in supply air duct collars as per approved drawings and specifications.

Supply, installation, testing and balancing of inlet air louvers with bird screen and volume damper for fresh air in powder coated extruded aluminum construction as per specifications and approved shop drawings.

THERMAL INSULATION Supply and fixing of UL approved acoustic lining on A C ducts with 19 mm thick Nitrile foam Class O accoustic insulation including Anti Microbial coating providing adhesive, adhesive tapes etc. as per specifications.

THERMAL INSULATION Supply and fixing of UL approved thermal insulation on A C ducts with 13 mm thick Class O Nitrile Rubber insulation including providing adhesive, adhesive tapes etc. as per specifications.

Supply and fixing of UL approved Underdeck thermal insulation for the roofs with 25 mm thick closed cell nitrile rubber insulation of class ‘O’ Fire rating conforming to BS 476 Part 6 including providing adhesive, adhesive tapes etc. as per specifications.

Supply, laying testing and commissioning of 1100 volt grade armored XLPE. insulated and sheathed aluminium / copper Power conductor cables of sizes as below, on cable trays with suitable clamps, saddles, hooks, bolts etc. complete as per specifications and as required. The quoted rate shall include the cost of proper dressing of cables and also providing identification tags as required. (a) 3.5 core 300 Sq.mm Al cable.

(b) 3.5 core 70 Sq.mm Al cable

(c ) 3.5 core 50 Sq.mm Al cable

(d) 4 core 16 Sq. mm Al cable

(e ) 4 core 6 Sq. mm Al cable

Supply, laying testing and commissioning of of size 4 core 1.5 Sqmm 1100 volt grade armored XLPE insulated and sheathed copper conductor control cables of sizes as below, on existing cable trays including terminations with suitable clamps, saddles, hooks, bolts etc. complete as per specifications and as required.

Supplying and Installation powder coated GI perforated type Cable trays manufactured as per the specifications given in the tender including all the tray accessories including supports, bends, anchor fasteners, GI hardware etc. (a) 300 mm wide x 40mm x 2 mm thick

(b) 150 mm wide x 40mm x 1.6 mm thick

Supply and fixing of GI earthing conductor of following sizes completely as required. (a) 25 x 6 mm GI strip

(b) 8 SWG Copper wire

Supply and fixing for Isolator switch for fans motors, etc with sheet metal enclosure, rain protection wtc as required to suit site condition.

DISMANTLING AND DEPOSTING TO E/M STORE YARD Dismantling of Existing Central Plant Comprising of the following Reciprocating type chillers 30 TR 3 EACH Condensor water pumps 2 EACH Chilled water pumps 2 EACH Main Electrical panel with cabling work Cooling tower Air Handling Unit Piping for chilled water and condensor water AHU panels GI Duct plenum within AHU room. Cables Other Misc items within the plant room and upto Cooling toer including existing foundations. Note:- (a) Contractor/ bidder shall submit complete design for the Central AC plant comprising of heat load calculations, working drawings of complete AC plant supported with design/calculations duly vetted by IIT Except IIT Jammu of each component (chiller, water pumps, VFD's, boiler, piping and ducts) within one month of the date of commencement of work through GE for the approval of Accepting Officer before execution of the work. (b) Contractor/bidder will be responsible for performance guarantee of complete AC plant to achieve the inside design conditions round the clock throughout the year with overall COP of the system not less than 4.7. (c) Lump sum quoted by the bidders shall be deemed to be inclusive of any design changes of Air Conditioning Plant and vetting of the same by IIT Except IIT Jammu. Nothing extra shall be payable on this account.

(d) Rates quoted by the contractor shall be for complete finished work including cost of all labor material, scaffolding, finishing as required with tools, plants, cartage, lift, taxes, tollage, octroi, royalties etc. All works shall be executed as per BoQ, particular specification, drawings and instructions of engineer in-charge and shall include the supply and installation at site of all the equipment, ancillary materials as specified and all such items what- so-ever which may be required to fulfill the desired intent and purpose. All materials shall be as per ISI specification and with IS certification marked wherever applicable. The material shall be duly approved by engineer in-charge before incorporation in the work. (e) Lump sum quoted by the bidders shall be deemed to be inclusive of Air Conditioning Plant and all other items including successful testing & commissioning. Bidders shall quote their rates accordingly. Bidders shall also visit the site before

Excavation in trenches not exc. 1.5m wide and not exc. 1.5m depth and getting out for laying of underground cable etc in any type of soil complete all as specified and directed.

Material and labour for dry & clean sand cushioning in trenches spreading and consolidation 8cm thick before laying the cable and 15cm of sand after laying the cable and punned the same up 18cm complete all as specified and directed.

Material and labour for supplying and laying un-reinforced precast concrete cable cover class LV, type-I, flat, size 250 x 150 x 40 mm complete all as specified and directed.

Returning, filling in, including spreading, levelling watering and well ramming in layers not exc. 25cm thick in any type of soil complete all as specified and directed.

Removing of excavated soil to a distance not exc. 50 metre and depositing where directed at a level not exceeding 1.5m above the starting point, complete all as specified and directed.

SATISH AND CO (BID ID -3040439)