SPECIAL REPAIR /REPLACEMENT OF CERTAIN BER AC PLANTS AT AIR FORCE STATION HALWARA UNDER GE (AF) HALWARA

Amount

Dismantling and taking down old unserviceable Chiller palnt 30 TR x 3 Nos complete including motor, pump, pipe line, Valves , ducts , diffusers and dampers and depositing it in MES store and making good the disturbed portion complete all as specified and directed by Engineer in Charge.

Design,Supply, install , testing and commissioning of Water Cooled Scroll Chillers, with multi compressors, comprising of Semi - Hermetic/Hermetic/ Open Type Compressors, DX Evaporator, Shell and Tube Condenser,suitable expansion device, suitable for operation on R - 22 /R - 407 C/R 410a refrigerants and of nominal capacity not less than 30 TR (each) circulation rate of 610 LPM (160 GPM) (nominal) each comprising of the following complete as per specification and as required. Compressor automatic capacity control, safety switches, forced feed lubrication insulated chiller, water flow switch, vibration isolators, integral refrigerant piping and wiring, automatic and safety controls mounted in central console panel and all mounted on a steel frame (complete as per specifications), suitable for 415volt 50Hz cycles, 3 phase AC supply, including all required accessories as specied and as directed by Engineer in Charge. Refrigerant - R-134A/ R - 407 C/R 410A Evaporator fouling factor -0.0001 (British Units) Condenser fouling factor-0.00025 (British Units) ( 2 units working & 01 standby) Note :(i) Design of Chiller plant shall be approved by accepting officer before incorporating the same on ground. (ii) The design condition of the plant should be able to meet the desired temeprature of 20°C+2 °C, with RH of 55% as per the weather conditions of Halwara during Summer, Monsoon & Winter. (iii)The plant shall be designed such that the desired temperature is maintained by running only 2 units at a time and 01 shall be on standby. (02 working & 01 Standby)

Design ,Supply, installation, testing and commissioning of electrical Hot water Generator of vertical construction equipped with sufficient number of flanges and electric emersion heaters. The pressure vessel shall be constructed as per ASME standards and insulated on all sides with 50 mm thick fiberglass with 0.6mm Aluminium cladding as per specifications.The hot water generator shall be equipped with all automatic and safety controls such as manual reset, high temperature water cutout, step controller, on/off switch, pilot light,low water cut off 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 hot water generator shall be suitable for 415 volts, 50 Hz, 3phase power supply.The entire hot water generator shall be factory assembled and tested.Including 02 Nos Hot generator pump of suitable capacity as required at site. Note :(i) Design of Hot water generator shall be approved by the accepting officer before incorporating the same on ground. (ii) The design condition of the plant should be able top meet the desired temeprature of 20°C+2 °C , with RH of 55% as per the weather conditions of Halwara during Summer, Monsoon & Winter.

Design,Supply, installation, testing and commissioning of induced drafttop discharge counterflow type FRP Cooling Tower (Rectangular/Roundbottle shape) with FRP body and base, water spray headers, cooling tower fills, fan with motor, supporting baseframes, as per manufacturer's standard instructions suitable for Chiller plant designed as mentioned in item ser No 2 above with the cooling tower capacity not less than 70 TR. The cooling tower shall have the following features:- FRP Water basin, PVC Filling with integral louvers and drift eliminators complete with hot water basin either fitted with spray nozzles or having self rotating sprinklers, statically and dynamically balanced axial flow type fan-direct driven or driven through reduction gear box with TEFC induction motor with high efficiency class , suction screen, make-up quick fill arrangement, overflow and drain connections with necessary valves and suitable inspection ladder, access arrangement for cooling tower interior , Range: 4.2 Deg. C/ 7.5 Deg. F Condenser water inlet/outlet temp-90-97 Deg F Wet Bulb Approach: 2.78 Deg. C/ 5 Deg. F Note : Design shall be approved by the accepting officer before incorporating the same on ground.

Design ,Supplying, erection, testing and commissioning of chilled water pump set for chilled waer suitable for plant as mentioned in Item ser No 2 above. The pump to be disigned with 2 working and 01 standby concept. The pumpset to have followiung specifications TEFC squirrel cage induction motor with class 'F' insulations & efficiency class EFF1 4pole synchronous speed , operating on 415 volts ,3 phase , 50 Hz A.C suply, Min. pump efficiency at duty conditions shall not be less than 75% complete all as specified and as directed by Engineer in Charge. Note : Design shall be approved by the accepting officer before incorporating the same on ground.

Design ,Supplying, erection, testing and commissioning of condensor water pump set capable of delivering 360GPM /1360LPM of water against a head of 22 mtr. Each pump shall comprise of following as required as per specifications and as directed by Engineer in Charge :- End suction Horizontal monoblock type, 1 NO- 5 HP, TEFC squirrel cage induction motor with class 'F' insulations & efficiency class EFF1 , 4pole synchronous speed , operating on 415 volts ,3 phase , 50 Hz A.C supply Min. pump efficiency at duty conditions shall not be less than 75%. The scope of work shall also include positioning of pump at location complete all as specified and as directed by Engineer in Charge. Note : Design shall be approved by the accepting officer before incorporating the same on ground.

Supply and fixing of M S Pipes heavy grade with all fittings laid in floors or fixed to walls and ceilings with and including necessary clamps, vibration isolators and fittings etc required at site for chilled water insulation pipe complete all as specified and as directed by Engineer in Charge for following sizes:-

100 mm dia

80 mm dia

Material and labour for insulation of MS pipe with PUF slab 40 mm thick with and including applying bituminuous compound and GI cladding with 26 gauge GI sheet complete all as specified and as directed by Engineer in Charge for the following sizes:-

100 mm dia

80 mm dia

Supply and fixing of M S Pipes heavy grade with all fittings laid in floors or fixed to walls and ceilings with and including necessary clamps, vibration isolators and fittings etc required at site for condenser water pipe complete all as specified and as directed by Engineer in Charge for following sizes:-

125 mm dia

100 mm dia

50 mm dia

25 mm dia

Supply and fixing of PN-10 butterfly valves (insulated pipe) in position with and including flanges,bolts, nuts gaskets etc. complete all as specified and as directed by Engineer in Charge for following sizes:-

100 mm dia

80 mm dia

50 mm dia

25 mm dia

Supply and fixing of PN-10 butterfly valves (condenser pipe) in position with and including flanges,bolts, nuts gaskets etc. complete all as specified and as directed by Engineer in Charge for following sizes:-

125 mm dia

100 mm dia

50 mm dia

25 mm dia

Supply and fixing of ball valves of size 25mm dia in position with and including flanges, bolts, nuts gaskets etc. complete all as specified and as directed by Engineer in Charge.

Supply and fixing of 3 way modulating insulated Control valves of size 80 mm dia complete with electrical actuator, heavy duty PN 10 cast iron body with nylon coated S.G. iron disk, water sealant lining, stainless steel shaft, control lever with thermostat, control wiring, accessories if any like transformer etc.. Insulation shall be as per the connected chilled water piping complete all as specified and as directed by Engineer in Charge.

Supply and fixing of PN-10 non return insulated valves of size 80 mm dia in position complete with all requirement complete all as specified and as directed by Engineer in Charge.

Supply and fixing PN-10 non return valves of size 125 mm dia in position complete with all requirement complete all as specified and as directed by Engineer in Charge.

Supply and fixing of PN-10 Y-strainer having CI body & bronze mesh duly insulated as per specifications and as directed by Engineer in Charge for following sizes:-

80 mm dia

125 mm dia

Supply and fixing of balancing valve built in measuring facility as per requirement at site complete all as specified and as directed by Engineer in harge for the following sizes:-

100 mm dia

80 mm dia

Supply and fixing of Pressure gauge 4" Dial 0-21 Kg as specified in SSR P-I Rating compllete all as specified and as directed by Engineer in Charge.

Supply and fixing of industrial type thermometer in the chilled water lines conforming to specification and as directed by Engineer in Charge.

Supply and fixing of flowswitch in the chilled water lines conforming to specification and as directed by Engineer in Charge.

Supply, installation, testing and commissioning of one soft makeup water tank for cooling tower makeup, pvc tank of 5000 ltrs capacity with and including required GI piping network and quick fill valve, overflow connection and valves complete all as specified and as directed by Engineer in Charge. Note:- The price quoted by bidder is deemed to be inclusive of staging of tank on a masonary /steel frame work etc at site.

Supply and fixing of PVC open Expansion tank of capacity 500 Ltr with and including full XLPE foam insulation complete all as specified and as directed by Engineer in Charge.

Material & Labour for framed work such as grills, gratings etc with ends of bars shouldered and or riveted or forged into spikes framed guard bars barred iron doors , ladders , framed baulsters walk ways, railings framework of water tanks and similar works confirming to Fe 290 Gde 165 complete all as specified and as directed by Engineer in Charge.

Supply and fixing of PVC drain pipe (Condensate drain pipe) insulated with 6 mm thick closed cell polyethylene insulation of 40 mm dia pipe,10 kgf/cm2 fixed to walls, ceilings or in floors etc.with and including fittings, supports as per specifications complete all as specified and as directed by Engineer in Charge.

Supply and fixing of MS tube, medium grade complete with all fiitngs laid in floor/ trench/wall complete all as specified and diected by Engineer in Charge for following sizes :-

50 mm dia

25mm dia

Supply, assembly and erection of GI sheet of size 20 Gauge with TDF flange rectangular/square duct made out of 'L' shaped hollow profile, duly factory boxed with and including all required accessories such as Corner, Cleat, Carriage bolt, Gasket, appropriate sealant etc on longitudinal joints etc complete all as apecified and as directed by Engineer in Charge.

Supplying, installing & testing of Powder coated Extruded aluminum supply air grilles with volume control damper complete all as specified and as directed by Engineer in Charge. Note:- All grilles shall be Single louvered.

Supplying, installing & testing of Powder coated Extruded aluminum return/exhaust air grilles without volume control damper complete all as specified and as directed by Engineer in Charge. Note:- All grilles shall be Single louvered.

Supplying, installing & testing of Powder coated Extruded aluminum supply air diffusers with VCD complete all as specified and as directed by Engineer in Charge.

Supplying, installing & testing of Powder coated Extruded aluminum return air diffusers without VCD complete all as specified and as directed by Engineer in Charge.

Supply, Installation and Testing of Acoustic lining 12 mm thick inside ducts using Non Fibrous fire retardant cross-linked polyethylene foam of 30+/- 3 Kg/m3 density & thickness of 12mm having porous surface on one side & a flat surface on other side using Synthetic rubber based Adhesive preferably Low VOC & high strength characteristic(Initial portion of ducting and main plenum) with anti microbial properties as per ASME G21 and G22 complete all as specified and as directed by Engineer in Charge.

Supply and applying of Closed Cell nitrile rubber thermal insulation material 25mm thick with aluminium foil protected. The Nominal Density of Material Should be 45-55 kg/m³ , having a thermal conductivity of 0.035 w/m°k at 23°C,mean temperature. The material shall conform to BS 476 parts 6 & 7, in a manner to be classified as ‘Class O’ complete all as specified and as directed by Engineer in Charge.

Supplying, installing and testing of Fresh Air inlet louver with volume control damper & bird scree, Aluminium extruded fresh air louver with VCD & Bird screen complete all as specified and as directed by Engineer in Charge.

Supplying, fabricating, installing and testing of double canvas flexible connection for constructed of standard material as per the drawings/ specifications fire retardant not less than 500 GSM.

Supply, installation, testing and commissioning of GI volume control duct damper complete with neoprene rubber gaskets, nuts, bolts, screws linkages, flanges etc, as per specifications and complete all as specified and as directed by Engineer in Charge.

Supplying, Fixing, testing and commissioning of fire dampers and actuator as followed of required sizes with and including control wiring, the damper shall be motorized and spring return so as to close the damper in the event of power failure automatically and open the same in case of power being restored. The spring return action shall be inbuilt mechanism and not externally mounted. The damper shall also be closed in the event of fire signal as per specifications and complete all as specified and as directed by Engineer in Charge.

Fire damper

Actuator

(v) One (1) Nos. TPN 16A MCB (Master controller) (vi) One (1) Nos. TPN 9A Contactor (Master controller) (vii) Space for TPN 16A MCB (viii) 02 Nos 20 Amp 4 Pole MPCB with starter suitable for 3.7 KW motor with on/off indication lamp and push button including auxiliary relay with contacts for hot water pump. (ix) MCCB 125 Amp 4 Pole for Hot water generator.

Material & Labour for laying XLPE insulated, armoured heavy duty electric cable with aluminium conductor 1100 Volt grade complete all as specified and as directed by Engineer in Charge of following sizes :-

3.5 core 185 Sq mm

3.5core 50 Sq mm

4 core 16 Sq mm

4 core 10 Sq mm

4 core 6 Sq mm

4 core 4 Sq mm

Suplly and fixing 2 core 1.5 sqmm PVC insulated multi stranded copper conductor cable 1100 volts grade suitable for control wiring all as specified and directed by Engr-in-Charge.

Suplly and fixing 3 core 1.5 sqmm PVC insulated multi stranded copper conductor cable 1100 volts grade suitable for control wiring all as specified and directed by Engr-in-Charge.

Material & labour for earthing with steel earth plate electrode 600 X 600X 6.00 mm thick buried directly in ground vertically at a depth not less than 2.25 meter below normal ground level with top edge of earth plate at a depth not less than 1.5 meter below normal ground level, earth plate surrounded from all sides by 15 cm thick packed layer of charcoal duct and common salt filling in alternate layers and electrode connections by using GI stip 32X 6 mm as earthing lead (upto the boby of the equipment) by means of bolts, nuts, check nuts and washers made of galvanised iron and thimbles and protected by light grade 40mm dia GI pipe connected to main switch board or main control board and GI pipe medium grade 20mm bore for watering and including funnel, wire mesh, RCC pit cover and PCC chamber pit with PCC (1:3:6) type C-2 using 40 mm graded stone aggregate, including excavation and earth work in any type of soil, returning, filling in approved soil and disposal of soil, returning, filling in approved soil and disposal of surplus soil to a distance not exceeding 50m all as specified and shown in electrical plate No. 3 of SSR 2020 (Part-I) complete all and as directed by Engineer in Charge.

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m deep and getting it out in soft/loose soil including forming bottom surface to required level for laying pipes/ cables complete all as specified and directed by Engineer in Charge.

Returning, filling in excavated soil including spreading, leveling, watering, well ramming in layers not exceeding 25cm complete all as specified and directed by Engineer in Charge.

Removing the surplus excavated soil to a distance not exceeding 50m and depositing where directed at a level not exceeding 1.5 m above starting point complete all as specified and directed by Engineer in Charge.

Material & Labour for sand cushioning in trenches and well ramming in layers 8 cm below and 15 cm above the cable with fine dry sand for cable protection complete all as specified and directed. Note:- Punned thickness 18 cm shall be measured for payment purpose

Material & Labour for brick protection with sub class B bricks old size laid dry flat in trenches over cable with longest dimention perpendicular to the axis of the cable includig taking out old bricks complete all as specified and directed

SHRI RAMSONS PROJECTS CORPORATION (BID ID -3413100)