letter of association

8/3/2019 Letter of Association

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PROPOSED CENTRAL FOR 9 GREEN PARK AT PUNE

DESIGN BRIEFON BUILDING SERVICES(HVAC, ELECTRICAL, FIRE ALARM, BAS, PLUMBING/SANITARY& FIRE

PROTECTION WORKS)

GENERAL :

The Building utilities have been planned in accordance with Internationalpractice followed in such types of Retail Centers as per standard codes ofpractice. It is intended to present in the following, an overall view of thedesign criteria adopted for the Air-conditioning & Ventilation services.

The proposed building consists of the following:

S. No. Description Area (Sqmtr) Area (Sqft)

1. PARKING LVL.1 1562 168072. PARKING LVL.2 3870 416413. PARKING LVL.3 4081 439124. PARKING LVL.4 4881 525205. PARKING LVL.5 6453 694346. PARKING LVL.6 8122 873937. PARKING LVL.7 8122 873938. STILT FLOOR 8122 87393

9. 4 BHK 2 BLDS 12852 13828810. 5 BHK 2 BLDS 17442 187676

GRAND TOTAL 75507 812455

In order to optimize the initial capital & operating cost of services, thelocation of HT Substation, DG set, A/c Plant, Fire & Water Supply pumpsplay a very important role in terms of saving in cost of expensive cableslength & minimising the line losses and similarly the length of condenserwater piping between A/c plant & cooling towers, piping between watertanks and pumps including location of various load centres in the building.

This report spells out the brief design concepts to be adopted in this projectfor various services relating to HVAC, Plumbing, Water supply, Fire,Electrical (Internal, External, including Substation) and Building automationsystem as follows:

1.0 HVAC System2.0 Electrical System, Fire Alarm & Building Automation System (BAS)3.0 Plumbing/Sanitary/Water & Waste Water Treatment.4.0 Fire Protection & Sprinkler System.


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1.0 HVAC SYSTEM :

1.1 The basis of design for central air conditioning is as follows:-

Outside Weather Data:

i. Location - Pune

a) Latitude (oN) - 18 31' N

Outside Thermal Data

Summer Monsoon

a. Dry Bulb 104F (40.0C) 83F (28.33C)

b. Wet Bulb 76F (24.4C) 79F (26.1C)

1.2 INSIDE DESIGN CONDITIONS :

Summer/Monsoon

a. Dry Bulb 72 2F (22 + 1C)

b. Relative Humidity Not exceeding 60%

Inside dry bulb shall be maintained within +1C by using suitable controls.

1.3 DESIGN BASIS FOR COOLING LOAD CALCULATION :

AREA RH NO. OFLIGHTINGLOAD

ACLOAD

Sr. No AREA NAME Sq. ftcfm/sq

ft CFM %PERSO

N watt TR

1 GUEST RM 174 4.43 770.39 50 2 261.0 1.93

2 LVL ROOM 412 3.09 1274.62 50 4 618 3.19

3 BED RM 1 174 4.62 804.07 50 2 261 2.01

4 BED RM 2 262 2.86 750.54 50 2 393 1.88

5 BED RM 3 168 3.15 529.64 50 2 252 1.32

10.32

TOTAL FOR BDLG 1 330.3408

6 GUEST ROOM 174 3.18 553.80 50 2 261 1.38

7 LIVING ROOM 312 3.37 1052.25 50 4 468 2.63

8 DINNING ROOM 177 5.57 986.56 50 4 265.5 2.47

9 DRESSER 1 72.5 3.76 272.39 50 1 108.75 0.68

10 BED ROOM 1 168 2.95 494.92 50 2 252 1.24

11 BED ROOM 2 193 3.68 709.95 50 2 289.5 1.77

12 DRESSER 2 55 3.24 178.23 50 1 82.5 0.45

13 BED ROOM 3 200 5.15 1029.19 50 2 300 2.57

14 BED ROOM 4 168 3.26 547.00 50 2 252 1.37

14.56

TOTAL FOR BGLD 2 524.1861


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15 GUEST ROOM 174 3.18 553.80 50 2 261 1.38

16 LIVING ROOM 312 3.37 1052.25 50 4 468 2.63

17 DINNING ROOM 177 5.57 986.56 50 4 265.5 2.47

18 DRESSER 1 72.5 3.76 272.39 50 1 108.75 0.68

19 BED ROOM 1 168 2.95 494.92 50 2 252 1.24

20 BED ROOM 2 193 3.68 709.95 50 2 289.5 1.77

21 DRESSER 2 55 3.24 178.23 50 1 82.5 0.45

22 BED ROOM 3 200 5.15 1029.19 50 2 300 2.57

23 BED ROOM 4 168 3.26 547.00 50 2 252 1.37

14.56

TOTAL FOR BGLD 3 524.1861

24 GUEST RM 174 4.43 770.39 50 2 261.0 1.93

25 LVL ROOM 412 3.09 1274.62 50 4 618 3.19

26 BED RM 1 174 4.62 804.07 50 2 261 2.01

27 BED RM 2 262 2.86 750.54 50 2 393 1.88

28 BED RM 3 168 3.15 529.64 50 2 252 1.32

10.32 TOTAL FOR BGLD 4 330.3408

TOTAL 1709.05

1.3.1 Basement (Parking etc.):

a) General Ventilation and Exhaust : 12 Air changes/hr.

b) Additional in case of Fire : 18 Air Changes/hr.

c) Total in case of Fire : 30 Air Changes/hr.

1.3.2 Toilets : 12 to 15 Air Changes / Hr.

1.3.3 Kitchen : 60 Air Changes / hr. (approx.).Exhaust Hoods to be considered forthe final design of exhaust &ventilation system).

1.3.4 Auditorium / Corridors : 12 Air Changes / Hr. for Smoke Exhaust

1.4 INSULATION:

Roof shall be insulated with 50 mm thick PUF or equivalent. Window Glass shall bedouble reflective type to minimize energy consumption.

1.5 PROPOSAL:

Total cooling load comes out to be 1710 TR (Refer Annexure- H1). It is proposed toinstall central VRV system for each building separately and by using BTU meter supplyto each apartment.

1.6 SYSTEM DESCRIPTION:


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Central air conditioning system has been designed to provide year round airconditioning for Central during Summer/Monsoon by providing a VRV system.

We proposed VRV system for new one as it is more efficient than chiller air conditioning

system. Proposed VRV system can be extend in future as per further modification ofarea very easily.

The working of VRV system is as follows:

Variable Refrigerant Volume (VRV) System. An engineered direct exchange (DX) multi-split system incorporating at least one variable capacity compressor distributingrefrigerant through a piping network to fan coil units each capable of individual zonetemperature control, through proprietary multiple indoor zone temperature controldevices and common communications network.

VRV heat-recovery multi-split system. A split system air-conditioner or heat pump

incorporating a single refrigerant circuit, with one or more outdoor units at least onevariable-speed compressor or an alternate compressor combination for varying thecapacity of the system by three or more steps, multiple indoor fan coil units, each ofwhich is individually metered and individually controlled by a proprietary control deviceand common communications network. This system is capable of operating as an air-conditioner or as a heat pump. The system is also capable of providing simultaneousheating and cooling operation, where recovered energy from the indoor units operatingin one mode can be transferred to one or more other indoor units operating in the othermode. Variable refrigerant flow implies 3 or more steps of control on common,interconnecting piping.

VRV multi-split system. A split system air-conditioner or heat pump incorporating a

single refrigerant circuit, with one or more outdoor units, at least one variable speedcompressor or an alternative compressor combination for varying the capacity of thesystem by three or more steps, multiple indoor fan coil units, each of which isindividually metered and individually controlled by a proprietary control device andcommon communications network. The system shall be capable of operating either asan air conditioner or a heat pump.


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Figure VRV schematic diagram

VRV is very simplified refrigerant piping system having more flexible than water piping.

The basic model of a variable refrigerant flow system (VRV system) used as a testedcombination shall consist of an outdoor unit (an outdoor unit can include multipleoutdoor units that have been manifold into a single refrigeration system, with a specificmodel number) that is matched with between 2 and 5 indoor units (for systems withnominal cooling capacities greater than 150,000 Btu/h (43,846 W), the number of indoor

units may be as high as 8 to be able to test non-ducted indoor unit combinations).The indoor units shall: Represent the highest sales model family as determined by typeof indoor unit e.g. ceiling cassette, wall-mounted, ceiling concealed, etc. If 5 areinsufficient to reach capacity another model family can be used for testing.Together, have a nominal cooling capacity between 95% and 105% of the nominalcooling capacity of the outdoor unit.Not, individually, have a nominal cooling capacity greater than 50% of the nominalcooling capacity of the outdoor unit, unless the nominal cooling capacity of the outdoorunit is 24,000 Btu/h (7,016 W) or less.Have a fan speed that is consistent with the manufacturer's specifications.All have the same external static pressure.

Air conditioning system will be provided with 100% emergency DG backup.

1.7 NOISE CRITERION:

All air conditioning equipment and materials (like pumps, chillers, motors, ducts, grilles,acoustic lining etc) will be selected, designed and installed in such a manner that theinside noise criterion for all conditioned spaces will be in the range NC-35 to NC-40.


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2.0 ELECTRICAL, FIRE ALARM & BUILDING AUTOMATION

SYSTEM:

2.1 GENERAL:

Electrical system shall be designed meeting the International Standards and complyingto the Indian Electricity rule. The electrical system shall be so designed that it is reliableand flexible to meet not only present requirements but also suitable for future loadgrowth, if any. Following are the brief design criteria proposed to be adopted for theelectrical installation.

2.2 POWER SUPPLY SOURCE:

Power supply to complex is envisaged to be provided by State Electricity Board at33 KV from the nearest grid. It is proposed to set up one no. 33KV substationexclusively to cater power requirement of this Complex. Power shall be stepped down to433V for further distribution. Besides this, captive power requirement is also envisaged

through DG Sets.

2.3 ELECTRICAL POWER REQUIREMENT

Estimated power demand for Complex has been worked out to 4200 KVA based on thepreliminary layout & details provided by the Architect and keeping in mind the normsand requirement of such type of Buildings/Facility.

2.4 33 KV/433V SUBSTATION

33 KV/433 KV substation is being proposed at Ground floor. This Substation will have2 Nos. 2250 KVA, 33 KV/433V Step down transformer, 3 panel 33 KV, 1500 MVA VCB

Switchboard. A metering panel along with HT breakers with over current and earth faultprotection shall be provided near the main gate of the Complex.

2.5 MV POWER DISTRIBUTION SYSTEM:

Power supply from Transformer to main LT Panel is being proposed through bus ducts.

65kA fault level M.V switchgears shall be provided with ACBs/MCCBs of adequateratings & with appropriate protections, aluminium busbars in cubicle compartmentalizeddesign. The connections further from M.V Switchgear shall be done using 1100 Voltgrade XLPE insulated aluminium conductor cables to various load centres such as AC

Plant, Plumbing etc.

2.6 POWER FACTOR IMPROVEMENT SYSTEM:

Adequate capacity of capacitor panels in bank formations is being proposed for powerfactor improvement. This besides meeting the requirement of electricity authority hasadded advantage of reducing the overall electricity demand on the supply authority thus,enhancing the overall economy, as maximum demand reduces substantially theelectricity bills also reduces in the same proportion.

The capacitors shall be connected to the main buses. Automatic Power FactorCorrection Relay (APFCR) shall be provided to sense the power factor and switching on

the capacitor bank as per the system requirement. The power factor thus shall bemaintained at around 0.95.


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2.7 EMERGENCY POWER SYSTEM:

Seeing the power supply shortage / load shedding and considering the necessity ofelectricity in the complex, it is proposed to provide 100% power backup to meet therequirement of electrical power under power failure load shedding condition. Adequatesize of DG Sets shall be provided for this purpose to take care of the total loadrequirement. Based on the preliminary calculation 2 Nos. 2000kVA and 1 No. 1250 kVADG Sets will be provided. These sets will be auto starting type and will be controlled andsynchronized through PLC to achieve economy of operation by selecting the desired no.of set for operation at any point of time.

2.8 POWER DISTRIBUTION:

Distribution & switching arrangement at various load centre has been planned keepingin view the provision of isolation and also the level of fault protection desired. Design ofdistribution system shall be such that maximum voltage drop at the farthest point from

the transformer supply point is kept within the prescribed norms. The main switchgearwill be rated for 50 KA fault level while secondary & sub panels for 35 KA & 25 KA etc.Power to various floors will be provided through a floor panel fed from Main DistributionBoard located at Basement in LT Panel room. Metering arrangement is provided on thispanel for monitoring of the power consumption of each tenant.

2.8.1 Distribution Boards:

For normal light and power distribution, distribution boards comprising of the followingshall be used:

i) MCCBs/MCBs : Incoming

ii) MCBs : Outgoing

iii) Earth leakage circuit breaker shall be provided in all the board in requiredcombination with a 30 mA & 100 mA leakage current setting for the safety ofhuman beings.

2.9 CABLING/WIRING:

33kV XLPE cables shall be designed on the basis of short circuit rating of 1500 MVAand full load current required at 33KV. Adequate sized XLPE insulated PVC sheathedaluminium conductor, 1100V grade MV power cables conforming to IS: 1554-1989 shall

be provided for power distribution in GI cable trays/under ground. However appropriatescreened copper/wires will be used for all special services and communication circuits.Separate shafts shall be provided for power and signal cabling.


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2.10 LIGHTING

The general lighting of various areas shall be planned to provide the followingilluminations:

S.NO. AREA DESCRIPTION TYPE OF LIGHTING

1. Common Area Compact fluorescent lamps

2. Service, Plant room etc. Fluorescent lights

4. Roads & Landscape Lighting HPSV / HPMV

6. Houses Fluorescent Lights

Lighting for outdoor areas, Roads etc shall have a combination Mercury Vapour andenergy efficient high pressure sodium vapors (HPSV) lamps. General lighting shall bedone using post-top lanterns or Bollard light or CFL lights. For building lighting energyefficient high-pressure sodium vapor (HPSV) lamps shall be used.

Landscape lighting shall be provided as per requirement of architect in accordance toactual use & Aesthetically suitable to provide the natural view further enriched by underwater light & fountains etc.

2.11 WIRING INSTALLATION:

The electrical wiring installation will conform to IS Standard (IS:732-1989). Thecomplete wiring installation concealed or exposed will be installed in heavy gauge rigidsteel conduit (black steel). The wiring for light and small convenience power outlets shallbe with PVC insulated copper conductor wires confirming to IS:694. The lighting circuitwiring/point wiring shall be carried out with 2.5 Sq. copper conductor while power wiring

shall be carried out with 4 Sq. copper conductor wires. Colour code shall be maintainedfor the entire wiring installation i.e. Red, Yellow and Blue for the phases and black forthe neutral and green for earthing.

2.12 EARTHING SYSTEM:

Safety in using electrical energy is of paramount importance considering its dangers.The earthing system will be in conformity with the IS:3043-1987. All non-current carryingmetal parts forming part of the electrical system shall be connected to the groundingsystem. The requirement of Indian Electricity Rules and Statutory requirement of localElectricity authority shall also be met fully.

i) Substation earthing (copper earthing) a) Transformer neutral earthing

b) DG Sets neutral earthing.

c) Telephone Exchange and UPSneutral earthing.


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ii) Protective earthing (GI earthing) a) HT panel body earthingb) Trans. & DG set body earthingc) LT Panelsd) Power Panele) Equipments

iii) Lighting circuit a) Insulated copper earthing wire

2.13 LIGHTNING PROTECTION SYSTEM:

Since this is a high rise commercial complex, the lightning protection will be required.The lightning protection system shall consist of batteries of air terminators at the terracelevel connected directly to earth termination through down comer strips.

The strips shall be 20 x 3 mm size GI and the system resistance will be in accordancewith the IS: 2309-1989. Separate earthing stations shall be provided for earthing ofdown conductors.

2.14 TELEPHONE SYSTEM:

Incoming telephone cables will run underground from the property boundary to thecentral MDF room.

The central MDF room will be provided in the basement.

Telephone cabling and risers will be provided throughout the Building with Sub-Distribution Frames telephone tag block located at each floor or area for final connectionof lines to the offices/restaurants.

2.15 FIRE ALARM SYSTEM:

An Analogue Addressable Fire Alarm System is proposed to be installed. The main firealarm panel shall be installed in the security control room at the Ground Floor andrepeater panels shall be installed at the appropriate location and Security Room at theMain Gate of the Complex.

The addressable smoke and heat detectors are proposed to be installed in all areas. Alldetectors installed in air conditioned areas will be linked to the specific AHU or FCU foralarm and controls. The hooters (annunciators) shall be strobe cum hooters whereverthe noise level is high. The whole system design shall be in accordance with NFPA. Thedetectors shall be as per IS: 2189; the specification and sensitivity shall be as per

IS:2176.

2.16 PUBLIC ADDRESS SYSTEM:

Public address is proposed for the entire complex. Main control panel and all necessaryassociated equipments such as pre-amplifiers, power amplifiers etc. shall be provided inSecurity room at the Main Gate of the Complex.

2.17 BUILDING AUTOMATION SYSTEM:

In order to have economy in operation and maintenance of the system alongwith a centralmonitoring facility, building automation system using network controller (NCUs) direct

digital controllers (DDC) technology will be provided for the controlling of chilling machinesand various pumps fan etc in HVAC works. Besides this, it shall also be hooked up to HT


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panel, DG Sets, Transformer, LT panel, Pumps Fans etc. The fire alarm system shall befully integrated to achieve economy in operations.

2.17.2 Cooling System

An operator can display a diagram of the entire cooling system and immediately knowwhich pumps chillers and cooling towers are operating. The data on the screen isautomatically updated every few seconds. The operator can immediately see the effecton important operational data such as the chilled water temperature as buildingcondition change.

Having all this information on one screen helps the maintenance personnel get the bigpicture. Modern Building Automation System allow the operator to control equipmentdirectly from the diagram he simply points at the symbol using the computer mouseand commands the equipment to start or stop.

2.17.3 Fire System

Diagrams are also used to assist the operator in emergencies. When a fire alarmoccurs, a floor plan can be automatically displayed giving the operator the criticalinformation he needs to be effected.

In emergencies, it is important that the operator is presented with all of the informationhe needs to make the correct decisions. A floor plan showing which zones are in alarmand the escape routes can mean the difference between a situation which is undercontrol and a disaster.

The building Automation System can be programmed to take immediate action in the

event of fire. For example, lights in escape routes can be turned on, air conditioningequipment can be used for the smoke control. The Building Automation can also printout detailed instruction for the operator.

2.17.4 Summary

Building Automation System details given as per Annexure- E4 enclosed.

2.18 FUEL (HSD) STORAGE & SUPPLY SYSTEM (OPTIONAL):

Fuel storage system for DG Sets consisting of two numbers underground HSD storagetank shall be provided.


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3.0 PLUMBING /SANITARY / WATER & WASTE WATER

TREATMENT:

3.1 CODE AND REGULATION:

Plumbing/Sanitary systems will be designed and installed in conformance with thefollowing codes and standards:

Regulations of the local authority.

National Building Code (NBC).

Manual on water supply and treatments published by Central Public Health andEnvironment Engineering Organization Ministry of Urban Development, Govt. Of India.

Manual on sewerage and sewage treatment published by Central Public Healthand Environment Engineering Organization Ministry of Urban Development, Govt. of India.

Relevant BIS Codes.

3.2 WATER REQUIREMENT / CONSUMPTION :

Domestic water requirement shall be as per code requirement.

WATER STORAGE:

Underground & overhead water storage shall be as per code requirement.

3.4 WATER SUPPLY SYSTEM:

The water supply from City Water Supply (Municipal Main), Borewells & Truck fillpoint shall be brought to underground fire storage tank and overflow from firestorage tank shall be taken to raw water storage tank in order to replenish thefire storage water.

The water from raw water storage tank shall be pumped through dual mediapressure sand filter and shall be taken to the underground Domestic water tank(Assuming the Borewell water & Municipal water are of potable quality).

The water from Raw Water Storage Tank shall be pumped through dual mediapressure sand filter and water softener and taken into underground soft waterstorage tank. The water from underground soft water storage tank shall bepumped through battery of two pumps (one working & one Stand by) toOverhead Soft Water Storage Tank from where the water supply under gravityshall be provided to Cooling Tower.

Water from Domestic Water Storage Tank shall be pumped through VFD basedhydro pneumatic system to all toilet / kitchen /pantry area & overhead fire waterstorage tank.

The Domestic Water Supply to each cooler shall be provided through AQUAGUARD or equivalent water purifier unit.


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3.5 WATER TREATMENT:

The following water filtration & bacteriological treatment is proposed to handleparameters in accordance to that for potable domestic water supply.

i. Filtration: Pressurized through dual media pressure sandfilters/Activated carbon filter.

ii. Bacteriological treatment by Chlorination/UV treatment.

Final treatment process will only be decided when test report for borewell water sampleis taken at the start of monsoon, during high flood and during normal period.

3.6 HOT WATER SYSTEM:

Hot water for domestic use shall be provided through independent domestic waterElectric Heaters (Geysers) in each toilet (if required) /kitchen.

3.7 SEWERAGE:

Drainage system for soil & waste is based on the most efficient, functional design, minimummaintenance after installation and available side topography to minimize the excavationwork in laying the pipes, two pipe system (soil and waste) is proposed to carry soil andwaste separately from the building under gravity.

Waste pipes are connected to manhole through gully trap and soil pipes are to be directlyconnected to the manhole.

The main drainage is carried through a battery of manholes and finally discharged intoSewage Treatment Plant (STP).

BASIS OF DESIGN FOR SEWERAGE:

The sewer lines have been designed for three times A.V. D.W.F. (Av. DryWeather Flow) in relation to the water supply demand.

It has been assumed that 80% of the domestic water supply shall find itsway into the proposed sewer.

All the sewer have been designed to run half full.

Necessary provision for laying S.W. / R.C.C sewer lines and manholesetc. have been made in the scheme.

Grease trap for kitchens is also provided before kitchen waste is discharged intoSewage.

3.8 GREASE TRAP:

A central grease traps will be provided for Restaurant kitchen before discharging it into theSewage Treatment Plant [STP] through waste line.


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3.9 SEWAGE TREATMENT PLANT:

Sewage Treatment Plant of 176M3/day shall be provided.

The Waste Water Treatment System will be treated using an extended aerationactivated sludge type system consisting of following system:

Component I [ Pre Treatment]:

a. Screen Chambers.b. Collection cum Equalisation Tankc. Solids handling sewage transfer pumps

Component II [Secondary / Biological Treatment] :

a. Aeration Tank

b. Clarifier Tankc. Chlorine Contact Tankd. Chlorine Dosing Systeme. Aerobic Sludge Digester cum Thickener Tankf. Sludge Disposal Pump

Component III [Tertiary Treatment] :

a. Filter Feed/Backwash Pumpsb. Pressure Filter c. Activated Carbon Filter d. Irrigation Water Tank

e. Irrigation Water Transfer Pumps

PROCESS DESCRIPTION:

Sewage generated from various sources including waste water generated from the kitchen &pantry after passing through a oil & grease trap will be carried through battery ofmanholes inter connected through soil pipes under gravity flow and will be collected in thecollection cum equalisation tank after passing through screen chambers near thepackage STP.

Manually cleaned bar screens will be installed in the screen chamber to screen of any largepieces.

Coarse bubble aeration system will be provided to keep the sewage in homogenouscondition.

From the Collection cum Equalisation Tank, the waste water will be pumped via twosubmersible solids handling pumps (1 working + 1 standby) into adjoining aeration tank.

In the aeration tank waste water will be mixed with micro-organisms in presence ofdissolved oxygen.

Micro-organisms will assimilate organic impurities. The mixed liquor suspended solids(MLSS) will be maintained at levels of 3,500 mg/l 4,000 mg/l. The bottom of the

aeration tank will be covered with submerged air diffusers. Submerged air diffusers willprovide mixing and oxygen for the needs of micro-organisms.


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Compressed air will be supplied through two positive displacement (roots type) common airblowers (1 working + 1 standby) for collection cum equalisation tank and aeration tank.

From the aeration tank mixed liquor will flow by gravity into adjoining clarifier tank. The

solids will settle in the clarifier tank. Sludge recycle air eductor pumps will pump thesettled sludge from the bottom of clarifier tank back to the aeration tank for maintainingdesired MLSS level. Clarifier tank will also be provided with a skimmer system to pumpfloating scum back to the aeration tank to keep the clarifier surface clean.

Overflow weir with scum baffle will be provided in the clarifiers to take treated wastewater out of the clarifier.

From the clarifier, treated waste water will flow via gravity into adjoining chlorine contacttank. In this tank chlorine will be added in the form of calcium or sodium hypochlorite.This tank will have baffles for intimate mixing. A free residual chlorine level of 0.3 0.5mg/l will be maintained.

Treated waste water after chlorine contact tank will be clear, odourless, low BOD (30 mg/l),low suspended solids and can be disposed directly to public drain.

For improving the treated waste water quality, treated waste water after chlorine contacttank will be passed through Pressure Sand Filter followed by Activated Carbon Filter forfurther reduction of Suspended Solids, BOD, COD, etc. so as to make it suitable forirrigation, plantation purpose, etc.

Treated water after filtration system will be clear, odourless, low BOD (20 mg/l), lowsuspended solids (10 mg/l).

The filter water will be stored in the Irrigation Water Tank, 2 Nos. (1W+1S) Irrigation WaterTransfer Pumps will be provided for irrigation purpose.

Excess sludge from the bottom of clarifier tank will be periodically wasted in the AerobicSludge Digester cum Thickener by use of air eductor pumps.

3.10 STORM WATER DRAINAGE SYSTEM :

Storm water drainage systems will be designed based on a rainfall intensity of 80 mm perhour. Rainwater harvesting pit of size 3m dia x 3.5m effective depth shall be provided.

Storm water drainage system will be provided for the building roof drainage and the sitedrainage.

The Storm water will be collected by gravity through catch basin, storm water manhole andRCC pipe and finally discharge to the Rainwater Harvesting Pit.

Overflow of rainwater harvesting pit shall be discharged to city storm water drain/stormwater sump.


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4.0 FIRE PROTECTION AND SPRINKLER SYSTEM:

ANNEXURE- F-1

MINIMUM FIRE FIGHTING REQUIREMENT AS PER NATIONAL BUILDING

CODE OF INDIA 2005 PART IV TABLE 23FOR EACH BUILDING

Type of Building Occupancy [Mixed Occupancy]Residential apartment /Houses(A-4)

Height of BuildingResidential apartment /Houses(A-4)-more than 60 m height

S. No. Description

Minimum Fire Fighting

Requirement

1. Fire Extinguishers Required

2. Hose Reel Required

3. Dry Riser Not Required

4. Wet Riser Required

5. Down Comer Not Required

6. Yard Hydrant Required

7. Automatic Sprinkler System Required

8. Manually operated electric fire alarmsystem Required

9. Automatic detection and alarm system Required

10.Underground static water storage tankcapacity

1,00,000 Liters

11. Terrace tank capacity 25,000 Liters

12.

Pump capacity for pump nearunderground static water storage tank(Fire Pump) with minimum pressure of3.5Kg/cm2 at terrace level

Two electric and one diesel pump ofcapacity 2280 LPM and one

electrical pump (Jockey Pump) ofcapacity 180 LPM

13.

Pump capacity at the terrace tank

level with minimum pressure of2.0Kg/cm2

Not Required


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4.1 SYSTEM DESCRIPTION :

The Fire Fighting System shall consist of Jockey pump, Electrical Driven Fire HydrantPump, Sprinkler Pump and Common Diesel Pump for Sprinkler & Fire hydrant (Internal& External), Air vessel, associated instruments, cabling, piping, valves, control paneletc. has been provided as per NBC requirement. Jockey pump shall maintain all waterlines for Hydrants & Sprinklers fully charged under pressure for full Automatic operationin case of fire.

4.2 YARD HYDRANT & INTERNAL WET RISERS:

The Yard hydrant shall cover the entire building externally with Hydrant points (yardhydrant) at appropriate location with hose boxes, hoses etc. These yard Hydrants will befed from an external ring. The internal hydrant system comprising of 1 No. Fire HoseReel Drum with rubber hose and nozzle, single outland landing valves, 2 length of 15 mlong, 63 mm dia hose with male and female coupling, branch pipe and Firemans Axe.

4.3 FIRE WATER SOURCE:Three Nos. under ground RCC water storage tanks each of 100M3 capacity has beencreated within the Complex. A pump house adjacent to the fire storage tank. Wherevarious fire water pumps and associated equipments would be located & 25M3

overhead tank for the Sprinkler system shall be provided.

4.4 PRESSURISATION SYSTEM :

This system shall comprises of one (1) No. Electric Motor Driven Jockey Pump,pressure vessel.

The hydrant system shall be kept pressurised all the times. The jockey pump shall start

automatically upon getting impulse from pressure switch of the pressure vessel. Thepump shall stop automatically. The jockey pump shall take care of the leakages in thesystem, pipe lines, valves etc.

4.5 MODE OF OPERATION:

a) In the event of fire, when one or more valves are opened, the water from thejockey pump will compensate water demand. If the water demand is not able tobe met by above, the relevant pressure fall in the header shall start the AC Motordriven fire pump through pressure switches, automatically. In case of failure ofelectricity or failure of pump to start or the pump not meeting the required waterdemand, the standby diesel pump set shall start automatically. However,

shutting down of the pumps shall be manual except for the jockey pump, whichshall start & stop automatically through pressure switches.

b) The setting of the pressure switches shall be adjustable so that any desirablesequence of starting may be achieved at site.

c) In addition to auto start arrangements, the main pump shall also have an overriding manual starting facility by push button arrangement in case of anemergency.


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4.6 FIRE BRIGADE INLET CONNECTION:

Fire brigade inlet connection shall be of gun metal with three four/way 63 mm diainstantaneous type inlets with leak proof built in type check valves and 150 mm diaflanged outlet connections feeding to the main fire grid. The collecting head shallconform to IS-904.

4.7 PRESSURE VESSEL :

To compensate for slight losses of pressure in the system and to provide an air cushionfor counteracting pressure surges/water hammer in the pipe work air vessel conformingto IS:3844 shall be furnished in the pump room near fire pump. The air vessel shallnormally be half full with water and remaining filled with air, which shall be undercompression when the system is in normal operation.

4.8 HAND HOLD APPLICATIONS:

Fire extinguishing hand appliances like 4.5kg CO2, and water type CO2 and ABC typeFire Extinguisher shall be provided at different location in the building as required.

4.9 SPRINKLER SYSTEM:

The automatic sprinkler system shall be provided in the entire building and the sprinklerheads shall be distributed as per the TAC/NBC so as to cover every 9 to 12 sqmtr. areawith each sprinkler head. The sprinkler pump shall be suitable for automatic operationwhen there is a drop of pressure in the system. Sprinklers shall be provided throughoutthe complex with separate sprinkler risers as required. Installation control valves and ahydraulic alarm in the basement shall be provided. An electrical sensor flow switch shallbe provided on each floor and connected to fire control panel so that it would bepossible to identify the location and the affected floor immediately.


18/25

ANNEXURE-F2

CAPACITY/HEAD OF FIRE FIGHTING PUMPS

Type of Building Occupancy - Residential apartment /Houses

Height and Covered Area - 75 m

Capacity/Head of Fire Fighting Pumps

As per NBC Part IV

S.No. Description Qty Flow Rate

(LPM)

Head

(M)

1. Main Hydrant Pump 1 No. 2280 1282. Standby Diesel Driven Fire Pump 1 No. 2280 128

3. Electrical Driven Jockey Pump 1 No. 180 128

4. Sprinkler Pump 1 No. 2280 128

PUMPING HEAD CALCULATION :

Pumping Head = Static Head + 3.5 Kg/Sq. cm pressure at Hydraulicallyfarthest Landing Valve + Friction Losses

= 7+ 35.0 + 10.0

= 120 MSay = 120 M

The Head of Pump selected is120 MWC that is 12.8Kg/Sq.cm which is more than the

required head of 12.0 Kg/Sq.cm and hence o.k.


19/25

ANNEXURE I

AREA STATEMENT

S. No. Description Area (Sqmtr) Area (Sqft)

1. PARKING LVL.1 1562 168072. PARKING LVL.2 3870 416413. PARKING LVL.3 4081 439124. PARKING LVL.4 4881 525205. PARKING LVL.5 6453 694346. PARKING LVL.6 8122 873937. PARKING LVL.7 8122 873938. STILT FLOOR 8122 87393

Actual superstructure

9. 4 BHK 2 BLDS 12852 13828810. 5 BHK 2 BLDS 17442 187676

GRAND TOTAL 75507 812455

SAY = 75600 Sqmtr.


20/25

ANNEXURE- II

[A] POPULATION ESTIMATION FOR APPARTMENT

OCCUPANCY (POPULATION)

Total Covered Area (Superstructure) = 30294M2 (Refer Annexure I)

Total no of Apartment = 136

Say, = 150

Considering 5 person per apartment (Refer Annexure-III)

Occupancy (Population) = 150*5

= 750 persons

Considering 15% population growth = 750x _15_(Refer Annexure-IV) 100

= 112.5persons

Say = 115 persons

Total Population = 750+115

= 865 persons

Say = 870 persons

Population to be served = 870 persons


21/25

ANNEXURE- III

Population Projection As Per IS: 12183 (Part I) 1987 [Code of Practice For Plumbing

In Multi Storeyed Building Part I Water Supply]

S.No. TYPE OF BUINDING POPULATION PROJECTION

1 Residence 5 Person Per Dwelling Unit

2Offices / CommercialBuilding

1 Person / 10 to 15 m2 of Plinth Area

3 School Strength of School Plus Teaching And Other Staff

4 HostelsNumber of Beds Plus 4.5 x Wardens Residence PlusStaff

5 HotelsNumber of Beds Plus Staff Plus Requirement ofRestaurant Seats

6 HospitalsNumber of Beds Plus Staff Plus (ResidentialRequirement if any should also be added)

IMPORTANT NOTE:

Five to 15 Percent additional population depending on the usage of the building shall beAdded for visitors and flotation population likely to use the building facilities.


22/25

ANNEXURE- IV

DOMESTIC WATER REQUIREMENT

A) Domestic Water Requirement for Apartment :

S.No. DescriptionWater Consumption

Liters/day

1.Estimated Population 870 Person (Refer Annexure II)1000 Person @ 135 liters/day/person

117450

2. Filter back wash and make up for water body and fountain 15,000

TOTAL 1,32,000Liters/day

Total Domestic Water Requirement 132,000 Liters/day


23/25

ANNEXURE VII

WATER FLOW RATE FOR DG SET AS PER MANUFACTURE

RECOMMENDATION

S. No. KVA Rating Water Flow Rate (LPM)

1. 125 121

2. 250/285 240/275

3. 320 400

4. 380 300

5. 500/625 531/540

6. 750 625

7. 1000 900

8. 1250/1500 1300

9. 1875/2000 1760

1. Drift Loss 0.05%

2. Evaporation Loss 1.6%


24/25

ANNEXURE- VIII

UNDERGROUND & OVERHEAD WATER STORAGE TANK

S. No. Description of Tanks Qty (Nos.) Capacity(M3)

Total Capacity(M3)

A)UNDERGROUNDWATER STORAGETANK :

1 Raw Water Tank 1 85 85

2 Domestic Water Tank 2 85 170

3 Fire Water Tank 1 100 100

B)OVERHEAD WATERSTORAGE TANK

1 Domestic Water Tank 2 50 100

2 Fire Water Tank 4 25 100

Notes : -i) It is proposed to provide R.C.C underground tanks for a capacity equivalent to one day

water requirements for domestic purpose.

ii) It is proposed to provide R.C.C overhead tank for a capacity equivalent to half-day waterrequirement for domestic purpose.

iii) Capacity of underground & overhead fire tank shall be as per NBC 2005 Part IV.

iv) It is proposed to provide R.C.C overhead tank for capacity equivalent to four/fivehours of daily soft water requirements.


25/25

ANNEXURE IX

DESIGN BASIS / CALCULATION FOR SELECTION OF TUBE WELL / BOREWELL

Tube Well

Total daily water requirement = 132,000 liters / day= 132 KLPD

Assuming on Average yield of Tube well = 5500 liters / hour

Considering pumping hour = 12 hours

No. of Tube Well Required = Daily Water Requirement___Pumping Hour x Discharge of Tube Well

= 13200012 x 5500

= 2 Nos.

No. of Tube Well Required = 2 Nos.

Stand by tube well provided (10%) = 0.2 No.

Total Nos. of Tube well proposed = 2 + 0.2

= 2.2

Say = 2 Nos.

Total No. of Tube well Proposed For = 2 Nos.

It is proposed to provide 2 Nos. Tube wells to meet the entire water requirement

letter of association

Documents