8550 REPAIRS / REPLACEMENT TO CENTRAL/ PACKAGE TYPE AC PLANTS AND ALLIED WORKS IN VARIOUS TECHNICAL BUILDINGS AT DRDL KALINGA UNDER AGE (I) Rn D NSTL, VISAKHAPATNAM

Amount

Material and labour for complete periodical servicing of Central Air Conditioner Plants of Capacity 3 x 70 TR (02 working + 01 standby) (Location Near MCC Bldg) Make-Blue star (excluding AHUs and cooling tower ) and checking servicibility of the items like cards, sensors relays, switches etc compressor oil checking , checking of leakage of refrigerant piping etc and descaling of complete chiller plant with suitable descaling chemical viscous compound which should be suitable for descaling of copper tube of chiller, condensers tubes of air conditioning plant . (Note-The arrangement for standard tools and plant shall be included and carried out through authorized vendor of the makes of AC Plant) Make Blue star complete all as specified and directed.NOTE :- (a) The chemical should be non corrosive and non polluting and safe to handle. Part/ Cat No of Descaling chemical compound is RXSOL-41-8865-25 Makes: Scalebreak/Vizag chemical /chemtex/west india chemical /.The qty of chemical is included in the job which is approx of 25 ltrs for each Job. The job includes all units, condensers & Chiller cleaning measures as one job and .Reassly the complete plant after necessary job .Restarting and Maintaining of the required /desired Parametrs shall be provided by the contractor. All the nuts, bolts of CI washers etc as required of suitable sizes to be included in the complete job (b) Proper record has to be maintained duly signed by contractor and Engineer-in-charge. (c) Job of periodical servicing shall be carried on onset of summer as one job and onset of winter as one job to be measured separately.

Material and labour for periodical servicing of AHUs by opening air filter, nut bolts, tray for AHU of 140 TR AC plant at VIB - I (2 units) and MCC Bldg (2 units) including cleaning of air filter panel, cleaning of cooling coil by coil cleaner solution and high pressure water and rectified refrigerant leakage in cooling coil complete with brazing and soldering, opening and disconnectning of AHU motor from blower room checking seviceability of shaft, fan puly fan belt and oiling /greasing complete , replacement unserviciable vibrating pads /spring in side of AHU for equal air flow from blower to defuser of any type /capacity blower complete all as specified and directed. Note:- V belts shall be measured and paid separately as supply only under respective items of this Schedule.

M&L for cleaning/ servicing of cooling tower, FRP type of 140 TR AC (3 x 70 TR) plant, cleaning of PVC/ FRP louvers by scraping inside and outside, cleaning of water tank, cleaning and replacement of damaged/ choked nozzles, replacement of PVC pipe n. exc. 3 mtr in length; arranging, refixing in position of all louvers in correct manner and applying one coat of black bituminous paint inside and outside of water tank, replacement of float valves with new one, cleaning of CT Fan blades, replacement of corroded nuts and bolts as per existing size including replacement of damaged/ broken louvers and unserviceable nozzles all as specified and as directed.

S&F for Liquid line Filter drier -DN/DCL 305 cat part No: 02370014 -46 bar of Make- Danfoss or equivalent of Performer complete all as specified and directed.

S&F for Thermostatic Expansion Valve TDEX with fixed orfice suitable for every type of plants i.e. Refrigerant type. Cat part No:MWP 667BE1414B of Make Danfoss or equivalent make of Parker and Sandhu complete all as specified and directed.

S&F for water pressure flow switch unit Model No : FSW-8-251 of Make as per existing make complete all as specified and directed.

S&F for safety device control Valve Cat Part No. 022-01887,350 PSI Of Make :SAMLAN or equivalent of Danfoss, Parker,Sandhu complete all as specified and directed.

S&F for HRC fuse with holder, 20 Amps 415 V Make: L& T, CE or as per sample as approved by GE complete all as specified and directed.

S&F LWT/EWT ( leaving water temp and Entering water temp ) sensors with probe of best quality as per the plant capacity along with minimum 6 meter of suitable core of copper cable as per existing size complete all as specified and directed. Note: The sensor should be of original make and are capable of sensing the EWT and LWT.of Make Auber Instruments or equivalent to PAC systems and solutions / Nakshika Enterprise.

S&F of RH sensor of Dehumidifier of Make Advance international having model no- AMDH1400 complete all as specified and directed.

M&L for complete leak testing the entire chiller unit of any capcity upto 70 TR consisting of compressors, condensers, chillers with connected chilled piping, expansion valves and all accessories by flushing out the refrigerant gas present in the system, pumping Nitrogen gas at requisite pressure, locating leak positions, rectifying the leaks, including pressure testing and holding the pressure for 48 Hrs for observation for any pressure drop in the system and flushing out the complete system on rectification of leaks if any, vacuumising & de-hydration the complete system with heavy duty vacuum pump and removal of moisture and other foreign particles from the system complete including checking of all safety controls and parameters, testing & commissioning of the AC plant after charging the refrigerant gas all as directed by the Engineer-in-Charge. [Note: Supply & charging refrigerant gas/ Nitrogen gas will be measured and paid separately]

M & L for disconnecting/ Dismantlig (electrically & mechanically) 3 phase, 440 volts, 50 Hz electrical motor from the monoblock pump set of 7.5 HP capacity and shifting to workshop, opening the motor end cover, taking out rotor, taking out burnt stator winding, cleaning the stator and rewinding the motor with appropriate gauge, weight and turns of super enamelled copper wire using proper insulating material, varnishing with Class-I varnish, heating/ baking, reassembling the motor completely and brought back to site, fixing back duly coupled with the pump in prope aignment, connecting and testing complete all as specified. Note: Insulation of windng shall be Class 'B' upto 7.5 HP and Class 'F' for 10 HP and above.

Repair to Microprocessor Electronic PCB Card of Chiller type Central AC plant of Make Blue star / Voltas including all devices like diodes, resistance, capacitor, IC, Thermostat, transformer, relay, switch, indicator, sensors etc. Complete all after disconnecting the PCB card from the Chiller unit and refixing the same after repair and testing complete all as specified and directed.

Supply, installation, testing and commissioning of 3-way modulating spring return mixing valves Electro - Hydraulic motorised actuator type, alongwith temperature controller other standard accessories and matching flanges shut off pressure dps= Min 7 bar, pressure class Pu=10 bar having flow rate 110 USGPM of size 80mm DN complete all as specified and directed. Make- Oventrop, Honeywell

M & L for de-scaling the condenser units of air cooled screw type AC plants of capacity of 320 TR (2 x 160) TR by circulating the approved cleaning agent / diluted chemical cleaning agent to a container of water. Apply the diluted solution to the condenser by pouring it along the fins. wait for 10 minutes so that the chemical can be absorbed inside the coil. Rinse the coil with water till removal inside the condenser coil, removing the scrap and dry all components, refixing the dismantled part, re-connecting with the system etc. including minor repairs all as specified and as directed.

M&L for complete leak testing the entire chiller unit of any capcity above 160 TR per unit consisting of compressors, condensers, chillers, AHUs with connected chilled piping, expansion valves and all accessories by flushing out the refrigerant gas present in the system, pumping Nitrogen gas at requisite pressure, locating leak positions, rectifying the leaks, including pressure testing and holding the pressure for 48 Hrs for observation for any pressure drop in the system and flushing out the complete system on rectification of leaks if any, vaccumising & de-hydration the complete system with heavy duty vaccum pump and removal of moisture and other foreign particles from the system complete including checking of all safety controls and parameters, testing & commissioning of the AC plant after charging the refrigerant gas all as directed by the Engineer-in-Charge. [Note: Supply only refrigerant gas will be measured and paid separately]

M & L for cleaning/ servicing the cooling coil/ blower fan, Filter of AHUs capacity upto 50 TR plant at VIB - II, MPPTF, ASH - I & ASH - II (4 units) by air pressure method using air pressure and cleaning the cooling coil with suitable cleaning agent, cleaning the AHU internally/externally, AHU Motors, scraping the corosion parts of AHU, Motors, tray ets complete , remove the scrap and applying two coat of synthetic enamel paint internally and externally to the AHU, Motors including greasing to AHU blower shaft bearing for smooth functioning, cleaning the AHU filter, replacement of unserviceable V belts etc. all as directed. Note:- V belts shall be measured and paid separately as supply only under respective items of this Schedule.

M & L for disconnecting/ Dismantlig (electrically & mechanically) 3 phase, 440 volts, 50 Hz electrical motor from the monoblock pump set of 5 HP capacity and shifting to workshop, opening the motor end cover, taking out rotor, taking out burnt stator winding, cleaning the stator and rewinding the motor with appropriate gauge, weight and turns of super enamelled copper wire using proper insulating material, varnishing with Class-I varnish, heating/ baking, reassembling the motor completely and brought back to site, fixing back duly coupled with the pump in prope aignment, connecting and testing complete all as specified. Note: Insulation of windng shall be Class 'B' upto 7.5 HP and Class 'F' for 10 HP and above.

M&L for servicing to3 x 22 TR (Blue Star) air cooled package AC unit at K- 4 bldg including washing of evaporator unit, condensing unit, greasing to condensor motor, blower motor for noise free operation, cleaning of drain pipe, cleaning of air filters, tightening of electrical/mechanical connections complete, all as specified and directed by the Engineer-in-Charge.

M & L for Removal of complete corrosion of body and electrical connections of Package Plant 3 x 22 TR (Blue Star) and applying two coats of synthetic enemel paint over a coat of redoxide and fixing with damaging the existing auxilaries/ pipe lines and electrical connections and complete fxing of the compressor / condnser unit fan controll units and testing complete all as specified and directed.

S&F in replacement of old u/s outdoor fan blade of Package AC of capacity 3 x 22 TR, Make Blue star. The fan blade shall be FRP type complete as specified and directed.

Material & Labour for complete leak testing the entire Package AC plant system consisting of 3 x 22 TR capacity consisting of variour makes for compressors, condensors, evaprators, with connected chilled/gas piping, expansion valves and all accessories complete with Nitrogen gas, locating leaks positions, rectifing the leaks and flushing out the complete system including pressure testing and holding the pressure for 48 Hrs for observation for any pressure drop in the system and rectifying complete and filling the regrigrent gas to desired pressure and testing complete all as directed by the Engr in charge

S&F Display unit suitable for indoor unit of Package AC of capacity 22 TR of Make Blue star complete all as specified and directed.

Dismantling AHU of 50 TR capacity AC plant carefully by removing side and top panel removing unserviceable blower shaft bearings,removing motor & blower assembly, replacement of new AHU blower shaft and bearings reassembling blower assembly and refixing electric motor & top side panel in original position with new nut bolts washers & shafts keys & checking the shafts balancing & testing for smooth running all as specified and directed

Supply only Wedge (V) Belts B-2253 LP /B87 for compressor & motor/ AHU & motor. [Make: Fenner/ Yule/ ContiTech]

Supply only Wedge (V) Belts B - 95 for compressor & motor/ AHU & motor. [Make: Fenner/ Yule/ ContiTech]

S&F in replacement Single phase preventer Heavy duty relay for protection against single phasing, phase reversal condition, unbalance condition, with inbuilt timer working on 440V, 50Hz power supply complete all as specified and directed. [Make: Minilec 3NA-30-323 or equivalent in Siemens]

S&F Starter Push Button switch with 1 NO + 1 NC complete working on DC/ AC supply up to 16 Amps capacity by removing of the defective unit all as specified and as directed. [Make: L&T ESBEE/ Siemens]

S&F in replacement 4 pole contactors AC operated rating at 415 Volts, AC1 45 Amps rating with 2NO + 2NC auxiliary contacts with operatabe coil voltage 24 volts to 415 volts AC/DC with front/ side mounted Add On blocks as per site requirement. [Make: ABB/ Siemens/ Schneider/ L&T]

All as per Item above herein before but of AC1 rating 30 Amps

All as per Item aboveherein before but of AC1 rating 60 Amps

S&F in replacement Thermal Overload relay, 18 to 42 Amps, direct mounted on contactors [TA42DU series of make: ABB or equivalent in GE/ L&T]

S&F in repplacement Thermal Overload relay, 22 to 80 Amps, direct mounted on contactors [TA75DU series of make: ABB or equivalent in GE/ L&T]

Supply only Refrigerant gas 'R- 407C' in manufacturer's sealed cylinder.

Supply only Refrigerant gas 'R- 134a' in manufacturer's sealed cylinder. Note (i) Empty cylinder will be returned to contractor on completion of work (ii) Net weight of refrigerant gas shall be measured and paid under these items.

Supply and Replacement of compressor oil for chiller of AC plants of capacity upto 160 TR of Blue star make all as specified and directed by Engr in Charge. NOTE:- Compressor oil will only be used of make recommended by OEM

Supply & refilling of Nitrogen gas in sealed cylinders of pressure rating of 90 psi of each cylinder for checking of leakage in all refrigerant piping and compressors (Empty Cylinders shall be returned to contractor after completion of contract) complete all as specified and as directed.

S&F 25 mm bore ball brass valves, high pressure, with polythene float and fly nut complete, screwed for iron pipe or brass ferrule and fixed in repairs. [Make: Leader/ Zoloto/ Lakshmi/ Sakthi]

S&F 20 mm bore ball brass valves, high pressure, with polythene float and fly nut complete, screwed for iron pipe or brass ferrule and fixed in repairs. [Make: Leader/ Zoloto/ Lakshmi/ Sakthi]

S&F 15 mm bore ball brass valves, high pressure, with polythene float and fly nut complete, screwed for iron pipe or brass ferrule and fixed in repairs. [Make: Leader/ Zoloto/ Lakshmi/ Sakthi]

S&F in replacement pneumatic safety valve for condensers of central AC plants of capacity of 140 TR. [Make: As recommended by OEM of AC plant]

Supply and fixing of water pressure meter dial type up to 14 Kg/cm2 complete all as specified and directed. Make: Guru/Danfoss

Supply and fixing of temperature meter dail type with stop valve 0 to 30 degree centigrade with complete acessories by removing of the old unserviceable meter complete all as specified and directed. Make: H- guru / danfoss/ universal

Removal of the damaged HP/LP cut out, supply and fixing of High Pressure cut out on the compressed / pressurised gas lines complete all as specified and directed.

Removing of the defective unserviceable temperature sensor and supply and fixing of temprature sensor / thermostat controller along with necessary controll wiring and acessories. Make: Simens/ Honey well

M&L for dismantling the existing rusted MS pipe line of any size from their existing position including all accessories complete all specified and directed by Eng in charge.

Material and labour for MS pipe heavy duty laid in trenches all required fittings of 150 mm dia bore all as specified and as directed by the Engineer-in-Charge. (Make: JINDAL/PRAKASH/BANSAL)

Material and labour for MS pipe heavy duty laid in trenches all required fittings of 100 mm dia bore all as specified and as directed by the Engineer-in-Charge. (Make: JINDAL/PRAKASH/BANSAL)

Supply and fixing Pre-filters box type with an efficiency rating of 80 to 90% to capture 10 Micron to 25 Micon size particles of synthetic fiber material of the following size with aluminium frame all as specified and directed by Engr in Charge. Size of pre - filter 24'' x 24" x 2''

All as per item above but Size of pre - filter 25'' x 20'' x 2''

All as per item above but Size of Pre - filter 20'' x 20'' x 2'

M&L for painting the entire air cooled screw/central type AC plants of the following capacities consisting of compressor units, condenser units,control panel, LT Panel (Power supply) , pumps and suction/disharge pipe lines by scrapping and cleaning the old painted surfaces, removing grease/ oil stains with cleaning agents and applying two coats of synthetic enamel paint of approved tint all as specified and as directed. (i) VIB - II, MPPTF, ASH - I & ASH - II Package Plant 300 TR (Blue star)

(ii) All as per Item above herein before but MS bldg 60 TR capacity

(iii) All as per Item above herein before but central type AC Plant of 140 TR (MCC Bldg) capacity

Taking down cement, any description on wire mesh of Chilled water pipe line etc. including raking out joints, hacking for key, scrubbing down with water all as specified and directed.

M & L for cement plaster of ratio 1:3 Rendering 10mm thick on fair faces of brick work or concrete surfaces all as specified and directed by Engr in Charge.

Supply and fix in replacement Butterfly valve 150 mm dia including taking down u/s existing butterfly valve complete all as specified and directed.

Supply and fix in replacement Butterfly valve 100 mm dia including taking down u/s existing butterfly valve complete all as specified and directed.

Excavation in trenches not exceeding 1.5 metre wide and not exc 1.5 metre in depth for foundation of pole or laying of pipein trenches etc and getting out in hard/dense soil complete all as specified and as directed by the Engr-in-Charge. (for MS pipe)

Returning, filling in, including spreading levelling, watering and well ramming in layers not exceeding 25 cm in soft / loose soil complete all as specified and as directed by the Engineer-in-Charge.

Removing excavated materials to a distance not exceeding 50 metre and depositing where directed at a level not exceeding 1.5 metre above the starting point all as specified and as directed by the Engineer-in-Charge.

M & L for dismantling the GI duct and Supply , assembly and erection of GI sheet 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, Gasket and appropriate sealant on longitudinal joints etc complete of size 24 Gauge.

Taking down unserviceable indication lamp and supply, fix and testing indication lamp (LED type) with showing red, yellow and green in colour of 22.5mm dia monitor on LT panel board suitable for 240V AC supply all as specified and directed. Make :- L&T / Binay

S&F in replacement of MCCB, adjustable thermal and adjustable magnetic setting of capacity 160 Amps, 415V, four pole , 36 KA of existing frame at site, complete all as specified and directed

S&F in replacement of MCCB, adjustable thermal and adjustable magnetic setting of capacity 200 Amps, 415V, four pole , 36 KA of existing frame at site, complete all as specified and directed

LAKSHMI SAI CONSTRUCTIONS (BID ID -3090525)