SPECIAL REPAIRS TO BER AC PLANT FOR COMCEN (KAJ) AND TELEPHONE EXCHANGE AT NAVAL STATION KARANJA

Amount

Dismantling the existing chilled water Type central AC plant 11 TR ( 3 x 5.5 TR) capacity complete set at COMCEN AC plant along with the following accessories: (a)compressor (03 Nos) ,(b) condenser (03 Nos) ,(c) compressor motor (03 Nos),(d) condensor pump motor (02 Nos), (e) AHUs 5523 CFM (01 Nos), (f) cooling tower (01 Nos) (g) AHU ducting (approx 350 sqm), (h) steel support for AHU ducting(approx 40 KG), (j) Main contrl Panel board (01 Nos),(k) AHU panel (01 Nos)(l) All sizes of LT cable (approx 40 RM), (m) GI pipe line (approx 40 RM), (n) Connected valves (18 Nos), (o) Connected pressure gauge (18 Nos) and connected foundation of compressors, motors, cooling tower etc complete all as specified and directed. Note:- Old dismantled plant with all equipments and accessory complete shall be deposited to AGE E/M-II store yard.

Designing, supplying, installing, testing and commissioning of chilled water type central air conditioning plant of capacity 13 TR (Approx) Inverter Scroll chiller of capacity- 13TR (01 Nos working and 01 No standby) with all equipments and accessories complete and comprising of the following :-Two Nos of water cooled chiller unit factory assembled with nominal cooling capacity appox. 13TR ,duly prewired and run tested at the factory with capacity modulation in steps to maintain inside condition as under:- Temp - 23 ± 2 °C, RH - 60 ± 5 %, Air changes 1 /Hrs, operational period 24 Hrs, Occupancy 18 No

Intelligent:- Microprocessor control to ensure ease of operation significant power saving to reduced maint cost and lower instance of break downs. (a) Digital setting of temp levels enable setting of desired temperature level accurately to ensure optical cooling and significant power saving . (b) Auto distribution load to ensure when the air condition is less than full capacity of the chiller microprocessor automatically to keep only the required compressor on and switch off rest. Moreover controller ensures all compressors evenly switched ON or OFF at regular interval to ensure efficient running of the chiller and ensure equal load on all the compressors. (c) BMS capability to ensure PC monitoring and remote connectivity features. (d) Protection mechanism:- The controller to protect the compressor from accidental phase reversal or single phasing errors .In built anti freeze protection ensure cutoff before freezing point to ensure lower instances of breakdown. (e) Non volatile memory:- all setting on the controller are stored in the non volatile memory and stop through power failure for avoiding the need to reset the parameters after every power failure. (f) Self diagnostics: - to help in identifying fault very quickly .technical fault can be detected and displayed on the controller to make trouble shooting simple. g) Auto start:- The controller restart automatically with its original setting after the restoration of power supply

(a) (i) Two Nos chillers each comprising of two compressor of 13 TON hermatically sealed units using R - 410 A refrigerant complete with suction and discharge shut off valves, automatic capacity control with the thermostats and solenoid valves, built in suction strainer, oil pump, hot gas muffler, heat wheel, oil pressure, safety switch etc all as specified and as directed by Engr-in charge.

(ii) Two Nos shell and tube type water cooled condenser for each compressor with fouling factor 0.00025 F ft2 hr/Btu and Min rate of flow of water 45.5 USGPM and max flow of water 52 USGPM ,water inlet/outlet temp 29.44 degree/35 degree centrigrade MS Shell and integrally finned copper tubes complete with safety valve, drain valve, water inlet and out valves, hot gas inlet and liquid outlet isolating valves, thermometer and pressure gauges at water inlet/outlet and purge valve all as specified.

(iii) Two Nos shell and tube type DX chiller with thermal insulation, temperature of water entering the chiller 12.2 deg C, temperature of water leaving of the chiller 6.7 deg C, including refrigerant inlet and outlet connections with isolating valves, expansion valves, water inlet and outlet valves, temperature and pressure gauges at water inlet and outlet, drain and vent, stop valves complete all as specified.

(iv) Two Nos stands fabricated out of MS powder coated chiller base frame of suitable size for mounting compressor, motor, and condenser.

(v) Two set of neoprene rubber anti-vibration ribbed pads with MS channel in foundation etc complete as per manufacturer's instructions for installation of the plant.

(vi) First charge of R - 410 A refrigerant and Compressor oil for the complete plant.

(vii) Bright annealed copper heavy duty refrigerant piping for suction, discharge and liquid line compete with fitting valves. suction line should be insulated.

(b) Condenser water cooling arrangement comprising of the following :-

(i) Two Nos EEC Series (Engery efficient) monoblock centrifugal condenser cooling water pumping sets of suitable capacity not less than 2 HP to achieve desired dishcarge and head alongwith necessary valves in suction and delivery line each of 100% capacity (01 Nos working and 01 Nos Standby) and suitable for operation on 3 phase 50 cycles, 415 volts AC supply along with hydraulic vane type water meter for flow measurement and providing a pressure gauge in each pump set of suitable capacity including suitable foundation with neoprene rubber anti vibration ribbed pads all as specified.

(ii) One No single Cell type corrosion resistant, fire retardant, FRP induced draft, rectangular type counter flow cooling tower of capacity 120% of plant running capacity with maximum allowable temperature 50 degree centigrade, drift loss 0.005% of water circulation of Make: Mihir/ Paharpur// polo/ Delta/ Advance with suitable foundation and float valve of suitable size and make up PVC three layered, closed lid, cylindrical shaped, ISI marked water tank of 3000 Ltrs capacity, (of Syntex Company ) mounted on suitable stagging as specified.

(iii) One lot of condenser water piping of MS 'C' Class piping as per IS1239 from make up tank to cooling tower, from cooling tower to condenser and return complete with fittings, valves, pot/ Y strainers etc.

(c) Chilled water circulation arrangement comprising of the following :-

(i) Two Nos monoblock centrifugal pumpsets of of suitable capacity not less than 2 HP for circulating chilled water alongwith necessary valves in suction and delevery line each of 100% capacity (01 Nos working and 01 Nos Standby) and suitable for operation on 3 phase 50 cycles, 415 volts AC supply, along with one number pressure gauge in each pump set of suitable capacity including suitable foundation with neoprene rubber antivibration ribbed pads all as specified.

(ii) Chilled water piping :- (a) A lot of MS 'C' class piping , ISI marked pipe of Make Tata/ Jindal with all fittings such as bends, elbow, tees, reducers, tees supports, flow indicators etc of suitable sizes as per site requirement to maintain the continuous and constant flow of chilled water from chiller unit to AHUs so that designed conditions can be met with.The chilled water pipe line network shall be laid under ground , above ground, floor, roof, a long wall etc. chilled water pipe line shall be insulated with EPS section of 50mm thickness with and including applying bitumenous compound and AL cladding with 27 gauge AL sheet to avoid the heatloss including water pipe line. Bidder shall ensure the quality of line insulation and adequate insulation be provided so that chilled water temperature of 8- 9Degree celcius can be maintained at AHUs inlet point. (b) A lot of butter fly valve, gate valve, sluice valve in chilled piping network to maintain required flow in each branch line as per approved layout diagram

(iii) Condensate water drain piping with GI pipe-B class conforming to IS:1239 of suitable size including all fittings like anchor fasteners, couplings, bends, elbows, tees, thrust, blocks, wooden blocks, flanges, welding as required including insulation as specified.

(iv) Chilled water make up ISI marked, three layered, closed lid, cylindrical shaped tank of syntex company having capacity 500 ltrs and thermally insulated with 50 mm thick EPS TF quality sheet of suitable sizes having density not less than 65 Kg/ Cu.m , thermal conductiivity 0.334 w /MK at '0' degree centigrade with protecting covering of 27 gauge aluminium cladding and supporting piping connections, valves, fittings etc all as directed and specified and as directed by engr -in charge.

(d) One Nos Air handling unit with not less than 7200 dehumidified air CFM ,static pressur 50mm WG suitable capacity with chiller unit of sectionalised construction, factory made double skinned six row deep cooling coil and 50 mm TSP complete with all accessories controls etc as per OEM specifications and comprising :-

(i) Cooling coils of copper tube with aluminium fins.

(ii) Prefilter, plenum and fire dampers in the supply air duct.

(iii) Heating Kits, strip type of min capacity 9 KW arranged in banks to serve as relative humidity control of conditioned space including providing switchgears, accessories, measuring devices, etc all as specified and directed complete with controls

(iv) Blowers for AHU complete with suitable electric motor, TEFC squiral cage induction motors for operation on 415 Volt, 3 phase, AC supply, with V Belt and belts guard

(v) Insulation of AHUs all as specified

(e) 01 Lot of air distribution system comprising of supply air ducts from AHU to all conditioned space and return air duct as per site requirement from conditioned space to AHU's etc including providing insulation to avoide condensation and effective designed condition in air conditioned space of all building including interconnectors as required from AHU to the conditioned space comprising of class VIII galvanised sheet with suitable supporting arrangements and bracing, supply / return/ fresh air grilles on sheet metal frame work duly painted /finished to match with the exisiting ceiling. Fire dampers operated with fusiable link shall be provided. NOTE:(i) The AC Duct drawing shall be produced for approval of Accepting Officer before fabrication of AC Duct work.

(ii) Any other connected work not mentioned above but considered necessary for maintaining the designed conditions of all buildings successful installation, commissioning and operation and efficient performance of the plant are deemed to be included into scope of work and quoted rates.

(iii) By pass valve shall be provided with each AHU to by pass the chilled water circulation on attaining the desired temperature in the conditioned space

(iv) Masonary work connected with the installation of plant, excavation for laying of pipe line, foundation for cooling tower and other equipments, cutting holes and making good the same etc

(v) Controls and instruments such as thermostats, humidistats, airstats solenoid valves etc for fully automatic operation of the plant.

(f) AHU Control panel - one Nos cubical wall mounted, indoor LT panel, dust and vermin proof factory fabricated, CPRI approved make, made out of not less than 2 mm thick CRCA sheet and powder coated protection class IP-52 suitable for operation on 3 phase 50 Hz, 415 volts, including internal wiring with 1100 volts grade single core, PVC insulated, FRLS, multistranded copper conductor cables of suitable current carrying capacity complete and comprising of the following accessories :-

(i) One set of 200 Amps rated copper bus bar suitable for 3 phase 4 wire, 415 volts mounted on PVC/ hygroscopic insulators and PVC colour coded Sleeves of R,Y, B and green colour complete arranged in separate compartment. -01 set.

(ii) Incoming MCCB, 4P, 40 Amps, 35 KA at 415 Volts - 01 No

(iii) Outgoing MCCB, TP, 16 Amps, 25 KA, 415 volts - 01 Nos (For heater bank)

(iv) Outgoing MCCB, TP, 16 Amps, 25 KA, 415 Volts - 01 No (For AHU motor)

(v) LED Phase indicating lamps RYB - 01 Set for each outgoing and incoming connection.

(vii) Single phase preventor for motors.

(g) Main Control Panel : Each Job- 01 No Supplying, fixing, testing and commissioning, cubical, floor mounted, indoor, LT panel, protection class IP-52, CPRI approved make dust and vermin proof made out of not less than 2mm thick CRCA sheet and 50X50X6 mm angle iron frame, powder coated, suitable for operation on 3 phase 50 Hz, 415 volts, including internal wiring with 1100 volts grade single core, PVC insulated, FRLS, multistranded copper conductor cables of suitable current carrying capacity complete and comprising of the following accessories :-

(i) One set of suitable rated copper bus bar suitable for 3 phase, 4 wire, 415 volts system mounted on PVC/ hygroscopic insulators and PVC colour coaded sleeves of R, Y, B and green colour, complete arranged in seperate compartment - 01 Set

(ii) Incoming MCCB 100 Amps 415 volts 50 KA with micro process release-01 No

(iii) Outgoing, MCCB TP, 32 Amps, 35 kA at 415 Volts with thermal magnectic release and adjustable overload (70 % to 100 %) - 02 No (For Compressor)

(iv) Outgoing MCCB TP, 6 Amps, 25 kA at 415 Volts with thermal magnetic release and adjustable overload (70% to 100 %) -05 Nos (For CT Fan motor and condenser pumps, chiller pumps).

(v) Outgoing MCCB 4P, 40 Amps, 25 KA at 415 Volts with thermal magnetic release and adjustable overload - 01 No (For AHU control panel)

(vii) Digital KWH (Energy) meter, Tamper proof, 3 phase, 415 Volts, 50Hz, CT operated of not less than 100 Amps Capacity - 01 No.

(viii) LED Phase indicating lamps RYB for incoming and each outgoing circuit connection.

(x) Fully automatic, star-delta starter having protection against single phasing, under voltage, overvoltage, short circuit current for all motors.

NOTE : - (i) Main LT pannel shall be installed in AC plant Room. (ii) AHU & Main LT panel The MCCB above 63 amp rating tobe provide with microprocessers based adjustable thermal & magantic releases. (iii) The provision of inter lockin wiring between compressor motor, condenser pump, AHU, cooling tower, chiller pumps, thermostats, solenoid switch shall be provided. (iv) The electric connections from main LT pannel to each devices such as motors, AHU, compressor etc shall be proviced by XLPE insulated, multistranded , 1100 volts grade copper conductor cable of adequate sizes. The cables shall run over the cable tray made of GI sheet of not less than 1.6 mm thick provided with fasteners, hangers etc as per the engr-in-charge directions . (v) LT pannel shall be compartmentalised comprising of cable gallaries, busbar chamber, compartment for each MCCB/MCB/ Starter etc duly marked with connected machineries etc.

(i) Any civil work involved in installation of panel board deemed to be included in item rate.

(ii) Engineer- in- Charge shall ensure that panel shall be manufactured as per approved drawing only. Contractor shall arrange inspection for panel at factory premises before dispatch. (iii) The contractor shall submit the constructional / general arrangement drawing for approval of GE

(h)Digital temperature and RH measuring sensor and RH & temperature control shall be installed in AHU room and in rooms OIC COMCEN, COMCEN office, NEWN room, Console room. DLC room and MDF room where AC is provisioned. The RH and temperature control shall ensure fully automatic operation of compressors and loading / undloading. The entire system shall be. The LCD display panel showing Temperature and Humiditywith control wiring and switches of all buildings shall be installed in AC Plant room.

(j) M & L for earthing complete, with GI earth plate electrode of size 60cm x 60 cm x 6mm thick burried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of the plate not less than 1.5m below the normal ground level connected with GI Strip 32 x 6mm by means of bolts, nuts, check nuts and washers of galvanised iron steel including necessary excavation and earth work in any type of soil , removing surplus soil to a distance not exc 50, with and including PCC chamber in PCC (1:2:4), type B1, using (20mm graded stone aggregate), having outer dimensions 60 cm X 60 cm X 60 cm and internal dimensions 30 cm X 30 cm X 30 cm, "mild steel angle iron frame" made out of MS angle iron of size 40 x 40 x 6mm thick duly painted with two coats of synthetic enamel paint over one coat of red oxide zinc chrome primer hinged with an including 10 mm thick CI cover with handle, watering arrangment with funnel internally secured with wire mesh with 20 mm dia medium grade pipe for watering, 40 mm dia light grade, GI pipe for lead protection form electrode to Test Point/ Pannels/ accessories in & including alternate layers of charcoal dust and common salt complete all as shown in electrical " Plate No 3" and connected and indicated including testing on completion- Each -6 ( Location : AC Plant)

Notes for Earthing: (i) GI strip and necessary Gi protection pipe upto Equipment and rate for the same is deemed to be included in unit rate of lumpsum of AC plants. (ii) The unit rate shall also includes for wire mesh, funnel, excavation, returning & filling, PCC chamber, pit, RCC Cover & test point. (iii) Earth pit shall be provided atleast 500mm away from the earth pit .

(C) M & L for water softening plant (FRP body) of feed flow rate 1.2 cubic meter/hr to remove the imparting impurities from water , hardness of water is effectively reduced by exchanging the sodium ions. Automatic & manual operations including auto multiport value and butterfly valve complete all as specified and directed . Each Job - 1

Comprehensive maintenance comprising of routine, preventive and breakdown maintenance of chilled water type central air conditioning plant of capacity 13 x 2 TR (One working and one standby) standby comprising of AHU installed, comprising of all devices and accessories through out 12 months on all days including sundays and holidays for a period of 03 years after expiry of defects liability period (i.e. 24 months after completion of all Phase II tests) complete all as specified and as directed by Engr-in-charge as shown below:-

1st year after expiry of defect liability period.

2nd year after expiry of defect liability period.

3rd year after expiry of defect liability period.

Manning and operation of chilled water type central AC plant of capacity 13 x 2 TR (One working and one standby) standby comprising of AHU installed, for a period of 60 (sixty) months [for three shifts of eight hours duration (0600 hrs to 1400 hrs, 1400 hrs to 2200 hrs and 2200 hrs to 0600 hrs)] for all days including sundays and holidays with all instruments and controls complete as specified as under and as directed by Engr-in-charge.

First year (11 Months after completion of phase I test)

Second year (11 Months after completion of 4.01 here-in-before)

Third year (11 Months after completion of 4.02 here-in-before)

Fourth year (11 Months after completion of 4.03 here-in-before)

Fifth year (11 Months after completion of 4.04 here-in-before)

Sixth year (05 Months after completion of 4.05 here-in-before)

Notes for item Nos 3.00 to 3.03 and 4.00 to 4.06: (a) The contractor shall be responsible for periodical maintenance, as per maintenance schedule attached and specified including renewal/ replacement of parts, fittings/ fixtures filling of refrigerant gas etc., required for smooth functioning of the plant as per manufacturers instructions.

(b) The Contractor shall employ refrigeration mechanic having minimum ITI qualification from Govt Recognised institute with adequate knowledge & minimum 3 years experience in maint /operation of AC plants. The operator must competent to carry out the minor maint all as directed by Engr-in-charge. (Total number of operators required per day are 03 Nos)

(c) Contractor shall pay the wages to the employees through e-payment i.e Adhaar linked bank accounts (credit to their bank account). Engineer-in-charge shall ensure that e-payment made to employees and their wages shall not be less than minimum wages fixed by state Govt or Central Govt whichever is more. Monthly e-banking statement shall be furnished by the contractor to the Engr-in-charge and the same shall be kept in record duly verified.

(d) It is the responsibility of contractor to deposit the employees provident fund (EPF) to the concerned authority as per the prevaling scales as laid down by Ministry of labour for all operator/ helper (as appliable) and necessary proof to this regard shall be submitted to the Engineer-in-charge for verification & record. The quoted rates shall be deemed to be included of above provisions. In case contractor fails to produce the proof of EPF, the same shall be recovered from his dues as per the prevailing scale plus 15 percent. (e) The contractor shall maintain all the registers under various labour law rules, 2017 and shall be produced to the Engineer-in-Charge as well as officers detailed by central labour department.

(f) Each shift duration shall be 8 hours & duty timing will be decided by Engr-in-Charge. (g) The unit rate quoted shall deemed to be included for cost of labour for daily routine maintenance for trouble free functioning of installation. (h) In case of any abnormal noise/ complaint the plant should be put off and same should be brought to the notice of Engr-in-charge.

(i) The operator employed by the contractor shall be capable of carrying out minor repair/ maintenance & should have well experience in AC plants as applicable. (j) The quoted rate is deemed to be inclusive of cotton waste, cleaning material etc., and contractor will ensure general area cleanliness and upkeep of the installation on daily basis. (k) The quoted rate is deemed to be inclusive of tools and testing instruments required for operation and maintenance of AC plants. (l) The rate quoted shall deemed to be inclusive of safety gear and required tools for minor maintenance. In case of failure to provide tools kit and safety kit (spanner sets, hand gloves), a penalty of Rs 3000/- will be recovered and levied. (m) The Contractor shall not employ same tradesman continuously for more than 11 months during the Contract period. (n) The contractor shall provide 02 uniforms to each operator and design of uniform shall be got approved. In case of failure, a penalty of Rs 2000/- per uniform will be levied and recovered from their dues. (o) In case of failure due to absence of operative staff, the contractor shall be liable to pay compensation at twice the cost of a day’s Manning & Operation derived from pro rate of Sch ‘A’ quoted rates. (p) The Contractor shall maintain proper records of all kinds of daily, weekly, monthly, quarterly, half yearly and yearly or whatsoever maintenance is carried out during contract period in a binded book / register and shall obtain the signature of Engineer-in-Charge every fortnightly. (q) The contractor shall provide board at proper location near each installations duly writting the name of operators and Mobile Numbers shiftwise.

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Pneumatic Engineers Pvt. Ltd.

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