SPECIAL REPAIR/ REPLACEMENT OF WATER COOLED CENTRAL AC PLANT AT WSA III AT AF STN NAL

EXPANSION TANK FOR CHILLED WATER PIPING- Supply and fixing rigid PVC Expansion tank duly insulated with 50 mm thick TF quality thermocol with and finished with GI chikcen wire mesh and aluminum cladding with connected pipes, valves and pressure gauges with inlet, outlet, drain and over flow connections with all valves of 500Ltrs. capacity complete all as specified and d

WATER-COOLED TYPE SCROLL CHILLER UNIT : Supply, Installation, Testing and Commissioning of factory mounted, Microprocessor controlled AHRI Certified water-cooled scroll chillers with controller, Mimimum Nominal capacity 25 TR , Refrigerent R410A/R 407C, Total capacity of the plant should not less than 50 TR, (2 Nos X 25 TR Working + 1 No X 25 TR Standby) with multi hermetically sealed scroll compressors, shell & tube type water cooled condensor and DX-Shell & Tube type evaporator duly insulated, electronic/ thermostatic expansion valve with extl. equlizer, filter dryer,HP/LP pressure switch, internal refrigerent piping, all wiring work included, mounted on a common iron/MS base frame & all as per specification including the following :- (a) Frame work for mounting the above condenser, chiller, compressor and motor with base plate comple

(k) Mode- Auto/ manual, compressor restart protection, 10 sec time delay between system, 5 Deg C anti freeze protection, (l) Units shall incorporate single phase preventor, reverse phasing, phase imbalancing , phase failure, overload tripping , temp and gauge, flow switch etc for protection and smooth functioning of then chiller plant. (m) AC plant will maintain humidity 55+-5% and temperature 23 degree centigrade+- 2 degree centigrade. (n) Chiller unit shall 3 BEE. star rated (o) Control panel of chiller should be equiped with tpoch screen display Note :- Contractor will submit chiller unit data and specification with parameters before place order of AC units for accepting

(c) AHU with 6 row deep Chilled water cooling coil & 2 row deep Heating coil(AHRI certified as per test standard ARI-410 & UL Certified for safety)with plain aluminium fins of 0.15mm thickness(11/12 Nos of Fins per inch for CHW coil & 8/10 Nos of fins per inch for HW coil) unless specified otherwise. Tube material shall be copper with dia of tube 12.7mm & thickness of tubes-0.41mm Coil casing /blank offs will be provides of GI material. 20 Gauge SS304 tray duly insulated with 13 mm closed cell nitride insulation. Header material will be MS and unit base will be G.S.S. base channel. Drain pipe dia shall be 50mm with U-trap of same size. (d) The minimum efficiency class of the motor shall be equivalent to IE5. The motor shall be Permanent magnet external rotor motor with integrated electronics and suitable for continuous operation. The speed of the motor shall be varied with an external 0-10V/PWM control signal. The fan in totality shall be of most efficient type so that the power Consumption and noise level is minimal. The motor shall be minimum IP55 protection class. (e) Controller module with RS 485 port compatible with BMS, on board protocol following 1. EC fan operation status 2. Chilled water valve operation status 3. AHU Airflow (CFM) 4. AHU power consumption 5. Controller shall also have fire trip alarm to shut AHU in case of signal from fire panel

te with anti-vibration pads /springs. (b) Initial/first charge of refrigerant gas & compressor oil. (c) The chiller operation parameters shall be :- Chilled water in 54 ºF(12.0º C) & Chilled water out 44 ºF (6.7ºC) (d) Max operating pressure 150 psig (water side/condenser side) (e) Condenser water out 95.0 ºF (35 ºC) & Condenser water in 84.99 ºF (29.44 ºC) (f) evaporator fouling factor 0.000018 m² ºC/W or 0.0001 sq ft hr ° f/btu (g) Condenser fouling factor 0.000044 m² ºC/W or 0.00025 sq ft hr ° f/btu (h) Chilling machine COP (at AHRI conditions) shall be min 4.4 and IPLV of min 5.2 & all performance requirements at ARI 550/590-1998 test condition. (j) Microprocessor shall activate audible/ visual and general alarm in event of low/high temp, low/ high humidity etc.

CHILLED/CONDENSER WATER PUMP:- Supply, testing commissioning of monoblock pump set of 3.0 HP (2.2 KW) suction/delivery of size 65 mm x 50 mm CI casted, Speed 2900RPM, head 22 Mtrs, discharge, 6.4LPS, Stainless steel impeller & pump shaft, mechanical seal, including 3.0 HP electric motor, copper wounded with 'B' class insulation & IP-65 protected, Cast Iron body, suitable for 3 phase, 50Hz, voltage range 300 to 440 Volts, ISI Marked, including making all electrical connections and testing for any leakage complete all as specified and directed by Engineer-in-Charge.

HOT WATER PUMP:-Supply, testing commissioning of monoblock pump set of 3.0 HP (2.2 KW) suction/delivery of size 50 mm x 40 mm CI casted, Speed 2900RPM, head 22 Mtrs, discharge, 138LPM, Stainless steel impeller & pump shaft, mechanical seal, including 3.0 HP electric motor, copper wounded with 'B' class insulation & IP-65 protected, Cast Iron body, suitable for 3 phase, 50Hz, voltage range 300 to 440 Volts, ISI Marked, including making all electrical connections and testing for any leakage complete all as specified and directed by Engineer-in-Charge.

irected.

AIR HANDLING UNIT: Supplying, installing, testing and commissioning of double skin Floor Mounted Air Handling Unit of nominal capacity -19000CFM with insulated panel- 25mm thick, CFC free PUF injected of 40kg/Cum denisity 0.6mm pre coated GI outer skin & 0.6 mm Plan GI inner skin with 25mm thick hollow extruded Al profile with smart AHU Controllers) along with all fixing accessories, angle iron work for base frame and necessary PCC work, complete all as specified and directed by Engr-in-Charge and comprising of following: (a) EC fan section shall be equipped with a Single Inlet Centrifugal Impeller with High Efficiency Backward curved blades and external rotor EC (Electronically Commutated) motor, energy optimized for operation without spiral housing for high efficiency and favorable acoustic behavior. The high efficiency backward curved impeller made of welded aluminium sheet/ high performance composite material, with external rotor motor balanced together statically and dynamically according to DIN ISO 1940. The EC fan should be capable of being fitted in horizontal or vertical position in the AHU, depending on the application including with internal wiring. (b) 50mm thick Pre filter (EU-4) in supply air stream with efficiency 90 % down to 10 micron & Media of filter -synthetic(non woven type).

24SWG (0.63mm thickness)

22SWG (0.80mm thickness)

AHU Control Panel:- Supply and installation, testing, commissioning, factory made, CPRI approved, Indoor type LT panel board of suitable size confirming to IS:5039 with IP-54 protection, made out of 2.0 mm thick CRCA sheet , 415 Volt, 3 phase , 50 HZ supply mounted on and including MS angle section 40mm x 40mm x 5 mm frame with front openable, Dust & varmin proof , gasket, TPN busbar shall be insulated with colour coated heat shrinkable sleeves and shall be mounted on proper insulator, gland, welding hinges of dust proof, overall powder coated complete all as specifed and directed & Consisting of the following equipments including

Air Distribution System/ Duct Work (Factory made/ Site Fabricated) : Designing, supplying, fabrication, installation and testing of GSS sheet metal ducting complete with TDF flange rectangular/square duct made out of 'L' shaped hollow profile, duly factory boxed, incl all accessories such as Corner, Cleat, Carriage bolt, EDPM rubberGasket and appropriate sealant on longitudinal joints etc complete with spliter damper, duct damper, vanes etc fabricated out of galvanised sheet class VII 120gm/ sqm zinc coating conforming to lS 277&IS 655 all as required and as per IS specification , complete with GI nut bolts, supporting Structure, MS angle & rods work etc and as per approved drawings complete all as specified and directed for the following gauges :- Note : 1. The cost is inclusive of duct with reinforcement/ strengthening, ait tight joints, incl accessories painting with black colour paint for duct sides behind the grills. 2. The gasket should be used in case for all duct shall be fire retardant type.

All as per item no 10 but dia of MS Pipe 80mm

All as per item no 10 but dia of MS Pipe 65mm

All as per item no 11 but dia of MS Pipe 40mm

All as per item no 12 but dia of MS Pipe 80mm

All as per item no 12 but dia of MS Pipe 65mm

Supply and fixing cast iron butter fly valves lever operated SS disc type nitrile/EPDM rubber lining PN 16 of dia 100 mm complete all as specified and directed.

ditto- all as per item No. 13 above but 80 mm dia.

ditto- all as per item No. 13 above but 65 mm dia.

ditto- all as per item No. 13 above but 50 mm dia.

ditto- all as per item No. 13 above but 40 mm dia.

Supply and fixing cast iron Y strainer flanged ends with SS perforated sheet screen of size 100 mm complete all as specified and directed.

ditto- all as per item No. 14 above but 80 mm dia.

ditto- all as per item No. 14 above but 50 mm dia.

Supply and fixing cast iron non return valves of dia 80 mm pressure class PN 1.6 including nuts, bolts, washers, gaskets, etc for Central type AC plants complete all as specified and directed by Engineer-in-Charge.

Supplying and fixing in replacement 5000 Litre capacity Rotational moulded polyethylene water storage tank, triple layered, food grain plastic (cylindrical, vertical with closed top), hoisted and fixed in position on existing wall, stage, roof or RCC staging complete all as specified in SSR Part-I including supply and connecting tank nipple, float valve etc., making complete connection of inlet and out let pipe, fixing of GI pipe (over flow) & washout to the nearest rain water drain complete all as specified and as directed.

Supply, installation, testing and commissioning of size 80 mm dia , precise balancing, double regulation type cast iron balancing valve having FG 200 cast iron body conforming to IS 210: 2009, copper alloy trim, stainless steel 2 Cr. 13 stem, 2.4 MPa body test pressure & PN 10, maximum working pressure and standard flange ends duly insulated with FM approved highly- flexible, closed-cell thermal insulation of elastomeric foam based on synthetic rubber (NBR) of apppropriate thickness laminated with 12 micron aluminium foil facing with reinforced glass scrim along with adhesives and other necessary accessories complete all as specified and

ditto- all as per item No. 18 above but 50 mm dia.

S & F of 4" bourdon tube pressure gauge conforming to EN 837-1, having copper alloy process connection & pressure element, plastic black pointer & case, plastic crystal-clear window, snap-fitted in case, accuracy class 2.5, scale range 0- 25 bar with accessories, etc. complete all as specified and directed.

S & F of 6" dual scale (°F/°C), lower mount (radial), bimetal thernometer having 0.5 NPT process connection, Grade A accuracy class as per ASME B40.200, stem diameter 6.35 mm, laminated safety glass window, stainless steel 304 case, steam, process connection & joint, aluminium dial & pointer, IP67 protection, scale range 0- 50 °C with accessories, etc. complete all as specified and directed.

Material and Labour for frame work with angle iron for frame support, with fabrication, welding joining including cutting tops to shape as directed, drilling holes, notching for wire, etc.; flat iron fillets (for securing wire mesh etc.) including all necessary drilling, bolting or riveting, etc., and similar work conforming to Fe-290 Gde E-165 complete all as specified and as directed by Engr-In-charge.

Supply, installation of corrugated, best quality, Pvc Drain pipe 25 mm and complete allas specified.

Supply, installation,testing & commissioning of Water Flow Switch having 100mm dia pipe including control wiring with complete all as specified and directed.

ditto- all as per item No. 23 above but 50 mm dia.

Material & Labour for Supply, fixing of powder coated extruded aluminum rectangular diffusers of required sizes with black anodized extruded aluminum volume control damper, nuts, bolts, screws etc. complete all as specified and directed by engineer-in-charge.

Material & Labour for Supply, fixing of powder coated extruded aluminum rectangular diffusers of required sizes without volume control damper, along with nuts, bolts, screws etc. complete all as specified and directed by engineer-in-charge.

Supply & Fixing of powder coated extruded aluminum supply & return grills complete with fixing accessories like nuts, bolts, screws etc. complete all as specified and directed by engineer-in-charge.

HOT WATER GENERATOR:- Supply, Installation, testing and commissioning of new Hot water Generator set of capacity 36 kW Vertical indoor type, working pressure 100, seamless copper tube, electric immersion (water resistance) type heater, test pressure 250, auto step controller, high/low level cut-off , water flow rate-103.2LPM, water holding cap.-40ltr, 50mm resin bonded fiber glass wool insulation, 0.6mm aluminium sheet clading with all connected accessories, control panel accessories etc complete all as specified and as directed.

CONDENSER WATER PIPING : Supply, laying / fixing, testing and commissioning of MS pipe , Class 'C' confirming to IS 1239/3589 complete Nominal Dia 100 mm , condenser water piping including necessary fittings viz. bends, tees, reducers, flanges, air purge valves, drain valves, structural support, necessary clamps, vibration isolators, etc. including painting and supporting / fixing the pipe in excavated trenches or on floor / wall / ceiling with clamps, hangers, angles, channels (using anchor fastners) with necessary accessories complete all as specified and directed.

Supply, install, testing and commissioning of Central AC Plant, which have following units and accessories are as under:-

Material & Labour for earthing with galvanized steel earth plate electrode of size 60cmx60cm x6mm thick buried directly in ground (earth pit not less than 2.25m deep below the ground level) with top edge of the plate not less than 1.5m below normal ground level, connected to the galvanized earth lead by means of bolts, nuts check nuts and washers of galvanized iron strip 32x6mm as earth lead as shown in electrical plate No. 3 of SSR Part-I connected to earthing test point all as specified or indicated including testing on completion including GI strip up to 7.5mtr and necessary excavation and earth work in soft/loose soil, returning filling, disposal of surplus soil, earth pit in PCC 1:3:6 type C-1 using 20mm graded stone aggregate pit, funnel, 20mm dia GI medium grade watering pipe, 40 mm dia GI light grade earth lead protection pipe and pre-cast earth pit cover 50mm thick made of RCC (1:1.5:3) type A1 duly reinforced with 8mm dia TMT bar @100mm c/c both ways, one lifting handle made out of 10mm dia TMT bar 250mm long embedded in cover slab and cover, wire, copper lugs etc mesh, charcoal and common salt in alternate layer of 15cm thick including taking down old unserviceable one complete all as specified and directed.

Supply and fixing of earth continuity conductor or main earthing lead (GI strip extension) of size 32 X 6mm fixed to plinth or buried in ground or drawn in GI pipe or any other situation as indicated for loop earthing etc complete all as specified and directed.

S & F GI cable tray of size 150mm x 50 mm and thickness 3.00 mm including painting work complete all as specified & directed.

Supply installation ,testing and commissioning of flexible fire retardent Canvas connector clothe including fitting accessories complete all as specified and directed by Engr-in-Charge

Supply only rubber mat LT 1.1KV volt grade 1mtrx 2mtr x 10mm

Supply and laying sub main wiring complete with 03 runs (Phase, Neutral & Earthing colour code) of single core 10 sqmm fire retardant low smoke and halogen (FRLSH) PVC insulated copper conductor cable multistranded and sheathed LT 1100 V grade drawn through and including concealed non metallic flexible conduit minimum dia 20mm ISI marked and accessories surface fixed on wall /floor etc all as specified. Note:- 03 runs of cable and 01 run of flexible conduit shall be measured as one unit for measurement purposes.

Dismantling old false ceiling any type and S&F false ceiling with power coated GI grid of size 600x600 mm using main Tee of size 24x28x0.40 mm prepunched to accept cross tee of size 24x28x0.40 mm and wall angles of size 25x25x0.40 mm fixed with wall around of size with and including 4 mm thick fiber cement board white colour designer tiles as approved by GE of size 595x595 mm placed in the grid and held in position duly suspended by 4 mm dia GI wire hanger from the roof with holding down clips, butter fly clips and necessary provision for light fixture etc complete as per manufacturers instructions and as per site requirement complete all as specified and directed.

Supply, laying and testing cable XLPE Insulated ,screened, PVC bedded,galvanized steel strip or wire armoured,electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 50sq mm 3.5 core with complete all as specified and directed

All as above per item No 36.00 here-in-before but size 25 sqmm, 4 core.

All as above per item No 36.00 here-in-before but size 16 sqmm, 4 core.

Demolition of brick or stone masonary built in cement mortar incl all quoins, arches, pillar etc. complete all as specified & directed.

Material and labour for brickwork with sub class 'B' bricks, straight or curved on plan exc 6m mean radius ,built in cement mortar 1:6 .

Material and labour 100mm thick cement concrete type D-2,1:4:8 (using 40mm graded crushed stone aggregate )as in sub base complete all as specified and as directed by Engineer-in-charge.

M&L for plastering 10 mm thick on fair faces of brick work in cement mortar 1:4 and finishing the surface even & smooth (without using extra cement), for foundations/wall of electric installations complete all as specified and directed

M&L for Preparation of new plastered surfaces of walls and applying two coats of whitewash complete all as specified and directed by engineer in charge.

Supply, laying and testing cable XLPE Insulated ,screened, PVC bedded,galvanized steel strip or wire armoured,electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 120sq mm 3.5 core with complete all as specified and directed

Supply and fixing 4 pole, MCCB 250A, 50HZ, 415V with rupturing capacity 35/36KA

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 mtr deep in soft loose soil for laying / taking up/ taking down of cables and getting out and levelling of bottom suface to required level all as specified and directed by Engineer- in- Charge.

Returning filling in Including spreading, levelling. Watering and well ramming soil in layers not exceeding 25 cm thick all as specified and directed.

Removing excavated material (ie soil) from site to a distance n. exc 50 mtrs away and depositing where directed at a level n. exc. 1.5 mtr above the starting point all as specified and directed by Engineer-in-Charge.

Material and labour for tiba sand for filling in trenches below and around underground cables for cushioning of cables etc, complete all as specified.

S&F sub class B bricks having minimum compressive strength 75 Kg/ Sqcm laid in trenches for cable protection etc complete all as directed by Engineer-in-Charge.

Boring of holes under road, pavement, hard standing by trenchless without damage nearby electric cable, water pipe line etc including HDPE pipe of 100mm dia suitable for 0.4 mpa working pressure complete all as specified and directed.

Supply, laying testing of GI pipe medium grade 40MM dia laid in trenches / floor/ fixing on pole / wall /in hard standing including necessary fittings etc complete all as specified & directed by Eng- in-Charge. Sizes are following:-