SPECIAL REPAIRS TO CENTRAL AC PLANT IN C AND R COMPLEX UNDER GE (I) GOS

M&L for design, supply, installation, commissioning and testing of Chilled water type Air Conditioning plant complete with all accessories all as specified for 3D Class room for Areas hatched in the drawing and marked as AC to meet design parameters given in Annexure ‘A’ having min capacity 3 X 22 TR (min) Two working and one standby comprising of the following :- (a) CHILLER UNIT- Water cooled Chillers meeting ECBC norms each having a capacity of 22 TR (min) comprising of semi hermetic/hermetic scroll type compressors of OEM make only with refrigent circuit, having automatic capacity control,HP/LP and oil pressure cutouts, nacessary insulation to chiller and refrigerant pipe and Sq cage induction motor of adequate capacity for operation on 3-phase 415 +/- 10% Volts 50 Hz A.C. Supply and drive arrangement as per manufacturer's design and standard specifications with shell and tube type water cooled Condenser with MS shell and copper tubes with integral fins complete with safety valve to match the capacity of compressor and insulated shell and tube type water cooled flooded evaporator with MS shell and seamless copper tubes ,flow switches at condenser and chiller outlet, compact refrigeration system including refrigerant piping,Refrigerant and oil ready for use on connecting electric power and cooling tower. Using zero ozone depleting potential and energy efficient as refrigerant preferably such as R-410/ R-407c with all accessories, display/guage panel of various parameters including microprocessor based control pannel for controlling various chiller operating parameters all as per manufacturer's design and specification etc complete -03 Nos ( Two working simultaneously and One Standby) and Earthing with Galvanised iron earth plate electrode 600 x 600 mm & 6 mm thick.The job also includes removal old plant along with all connected items and handover to MES

(b) CONDENSOR WATER STORAGE AND CIRCULATATING SYSTEM : Comprising of following based on undermentioned parameters :- (a) Condensor water inlet Temp - 32.22*C (b) Condensor water outlet Temp - 36.39*C (c) Condensor water flow - 3 gpm/Ton (d) Fouling Factor - 0.0001 Dec 'F' Sq Ft Hr/BTU (e) Maximum Permissible Pressure Drop - 10 M of Water head. (f) Digital temperature thermometer - 01 No

(i) Supply, installation, testing and commissioning of Horizontal split casing condenser water centrifugal pump sets with bronze impeller for condenser water recirculation complete with TEFC ,3 phase sq.cage induction motor with class "F" insulation working on 415 volts AC base plate,coupling guard,vibration isolators,SSshaft,factory fitted mechanical seal,flexible pipe connector at inlet and outlet etc.conforming to techenical specification and Campatible with above chiller unit of suitable H.P considering flow rate nearly 3 gpm/ton & min efficiency 80 %)-02 No. (each of 100% capacity, two working). (ii) The pipe size of 150 mm and below should be M.S 'C' class as per IS-1239 and above 150 mm shall be ERW pipe confirming to IS-3589-2001 with necessary insulation as applicable of appropriate dia for recirculation of water from condenser to cooling tower and return including connection from make up water tank and water circulating pumps complete with all pipe fittings, like valves tees,elbows flanges including Y strainer in main pipe line,non return valves,Butterfly valve,Gate valve and sluice valve etc all as required at site as per standard practice SSR Part-I and IS - One Lot ( Sizes of pipe selected should be in accordance with optimized system design and specified by the manufacturer).

(iii) Supply, installation, testing and commissioning of Electro static type non chemical scale preventor of suitable capacity having stainless steel shall Sl 304 as Negative elctrode & catalytic (copper) metal electrode with nylon plug as positive electrode including control panel for power supply (Single phase 220 V AC). Equipment shall be capable of removing hardness upto 1000 PPM and making all necessary arrangement all as per manufacturers recommendations. Qty 01 No.

(iv) 02 Nos. FRP Induced draft type cooling tower Cross /counter flow,twin/four cell,direct/gear driven,site erected cooling tower of 100 % capacity based on the parameters given below and complete with PVC fill/louvers,Drift eliminator,TEFC motor of suitable capacity, SPDP, 1.00 Service factor ,propeller fan,FRP sump and steel ladder FRP body to with stand sufficient wind velocity, vibrations and earth quake suitable foe Gopalpur condition. Fan and motor assembly confirming to minimum IP-55 protection for out door operation. Sprinkler head mounted on ball bearings designed to take both Radial and vertical thrust. Mechanical equipment support and all other steel components shall be HDG Steel. etc.The cooling tower shall conform to technical specification given in the tender. The max allowable sound power at a distance of one mtr from the cooling tower shall be less than 75 db. The cooling tower model shall be to suit site and design condition.-02 Nos (One working and one Stand by). Design Parameters / Guidelines : (a) Designed wet bulb temp - 26.1*C (b) Water Inlet Temp -36.39*C (c) Water Outlet Temp -32.22*C

(v) HDPE water tank of suitable capacity not less than 5000 ltr,ISI marked complete with inlet, outlet & overflow connection & float valves etc. Including pipe more than medium grade complete with fitting valves etc for connecting cooling tower sump & storage tank all as required and specified. -01 Nos. NOTE - Necessary platform for make up water tank and connected pipes and piping to be included in the rate quoted against above item.

(c) CHILLED WATER DISTRIBUTION SYSTEM : Comprising of following based on undermentioned parameters/ Guidelines (a) Chilled water inlet Temp - 12.22*C (b) Chilled water outlet Temp - 6.67*C (c) Fouling Factor - 0.0005 BTU (d) Maximum permissible pressure drop 10 Mtrs of Water head

(i) Horizontal split casing water centrifugal pump sets with bronze impeller for chilled water recirculation complete with TEFC 3 phase sq.cage induction motor with class "F" insulation working on 415 volts AC base plate,coupling guard,vibration isolators,SS shaft,factory fitted mechanical seal, flexible pipe connector at inlet and outlet etc.conforming to technical specification and campatible with above chiller unit of suitable H.P considering suitable flow rate & min efficiency 80 %) -02 Nos. (each of 100% capacity, 01 No. working ).The Chilled water pumps shall also include the cost of thermal insulation. (ii) The pipe size of 150 mm and below should be M.S 'C' class as per IS-1239 and above 150 mm shall be ERW pipe confirming to IS-3589-2001. Rigid section of fibre glass wool uniform density (80 Kgsm Cub Mtr Minimum) and with a 'K' value of not more than 0.034 Kal/h²-m²- C/ 10 Metre at 10°C mean temparature shall be used.

(iii)- Supply installation testing and commissioning of chilled water expansion tank of suitable duly pressurised complete with piping connections, safety relif valve, drain valve, pressure gauge etc complete as per specification. Tank construction as per ASME, Shall Material - Carbon steel, Blader - Heavy duty Butyl Rubber, System Connection - Forged steel with proper insulation as per requirement with safety working pressure of 3.5 Bar minimum. (iv) Supply and install NRV of suitable size and capacity on discharge side of each chiller pump. (v) Condensate drain piping made up of minimum Grade 'B' GI pipe with suitable for the system as proper insulation as per IS and NBC staindards.

(d) HOT WATER DISTRIBUTION SYSTEM : Comprising of following : (i) Supply, installation, testing and commissioning of electricalley operated Hot water generator of suitable capacity having 1 mm thick stainless steel lining with heaters arranged in banks and controlled by electronic controller and thermo stat so that required quantity of hot water at designed temparature and with nominal variations could be supplied including 75 mm thick fibre glass mineral wool insulation finished with 1.25 mm thick G.I sheet clading painted with heat resistant paint.The Hot water generator cylindrical in shape fabricated and of minimum 10 mm thickness in robus welded construction. It shall be completing with necessary supports for free standing floor, such that the bottom of the shell is 300 mm above the floor level. (ii) Supply ,installation,testing and commissioning of Monoblock hot water centrifugal pump sets with bronze impeller for hot water recirculation complete with TEFC Sq .Cage induction motor with class "F" insulation,base plate,vibration isolators etc. conforming to standard techanical specification . The Hot water pumps shall include thermal insulation.The Capacity of motor shall be decided as per design conditions - 02 Nos of 100 % capacity(both working).