ecocooling technical sales manual

TechnicalSalesManual

EcoCooling

EnergyEfficientCoolingSolutions

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© EcoCooling Limited 2010

ContentsContents p2How Evaporative Cooling Works p3Fixed Systems – Products p4Fixed Systems – Installations p5Server Room and Data Centre Cooling p6Internal Systems – Products p7Air Distribution p8Installation methods p9Commissioning, Maintenance, Noise and Running Costs p10Control p11Sizing of systems p12Comfort, Humidity and Condensation p13EcoCooling Performance in Various Locations p14Legionnaires Disease p15Frequently asked questions p16

Evaporative cooling is a completely natural way of producing refreshing coolair.

SIMPLE air distribution systems deliver cool, fresh air to provide completebuilding coverage or spot cooling.

Sophisticated process controls together with naturally low water operatingtemperatures assure a hygienic and SAFE cooling unit.

At 10% of the running cost of air conditioning and lower installation costs theEcoCooling evaporative cooler is a truly LOW COST cooling system.

Comparison with Conventional Air Conditioning

Evaporative Air Cooling

• Uses only 10% of the electricity comparedwith conventional air conditioning

• No refrigerants• Supplies 100% fresh cooled air• Low carbon dioxide footprint• Simple engineering• Low purchase cost• Performance improves at high temperatures

Refrigerated Air Conditioning

• High electrical use due to refrigerant circuitcompressor

• Uses environmentally damaging refrigerants• Uses mainly recycled air• High carbon dioxide impact• Complex engineering• High purchase cost• Performance reduces at high temperatures

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How Evaporative CoolingWorks

As warm air passes over wet filter pads waternaturally evaporates into the air. The air iscooled as it gives up the heat required toevaporate the water.

An EcoCooler has filter pads, which are keptsaturated with water when in ‘Cool’ Mode.Water from the sump is pumped over the padsvia a water distribution system.

An axial fan draws the air through the pads andinto the air distribution system. Air passesthrough insect screens prior to the filter pads.

Hygienic and efficient operation of anEcoCooler is maintained by the most advancedwater process controls available.

Only pure water evaporates from the padsduring evaporation. Salts will graduallyconcentrate and will eventually form scaleunless a ‘bleed’ system is used. The water isdrained before the scaling point is reached.

The control systemuses a unique fourlevel water probe todetermine the salinitylevel during theevaporation cycle.This system ensuresthe most efficientwater use and can beeasily adjusted toaccommodatediffering water quality.

Performance

The air off temperature of an EcoCooler isdependent upon the temperature of the air andits relative humidity (RH). Higher temperaturesgive greater cooling. Low RH gives greatercooling.

EcoCooler PerformanceRelative Humidity

Temp 20% 30% 40% 50% 60% 70% 80%200C 10.2 11.6 13.1 14.3 15.6 16.8 17.9250C 13.7 15.4 17.0 18.6 20.0 21.3 22.6300C 17.0 19.1 21.0 22.8 24.4 26.0 27.4350C 20.4 22.9 25.1 27.1 29.0 30.6 32.1

Detailed information about local weather can befound on www.wunderground.com.

The diagram below shows the typical profile fortemperature and humidity on a very hot day ina temperate climate. .

It can be seen that the RH is low when thetemperature is high. This means that themaximum cooling effect occurs at the highesttemperatures.

`

RelativeHumidity

90%RH

RelativeHumidity

90%RH

35%RH

30oC

22oC

20oC

22oCAmbientTemperature

Cooled Temperature

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Fixed Systems – ProductsFixed installations are based on three variantsof EcoCooler; down, side and top discharge.

Down Discharge

Top Discharge

Side Discharge

Factors affecting the choice of EcoCooler are:• Avoidance of roof penetrations• Safe access for installation and

maintenance• Ductwork lengths

Wet BoxesEcoCoolers can be supplied without the fan.These are used as pre-coolers for existingsystems or where higher duty fans arerequired. Wet boxes can be supplied in down,top and side discharge configurations.

At 14,000m3/hr a down discharge wet box hasan air flow resistance of 50Pa.

Services Requirements

Water: Supply minimum 1 bar max 7 bar.Minimum supply 500 L/hr. Sump Capacity 23LCooler is supplied with 300mm flexibleconnector pipe fitted with isolation valve andfinishing in 15mm compression fitting.Electricity: 240V 50Hz. 12A start 8A running.External isolator fitted as standard.Drain: Minimum capacity 2000l/hr to anappropriate drain point in accordance with localwater regulations. The drain valve is suppliedconnected to the controls but not fitted toprevent damage in transit and installation.

Basic SpecificationCirculation Pump: 50W CentrifugalDimensions: Height 950mm, Length 1170mmWidth 1170mm, Volume 1.3m3

Duct Size (Down Discharge): Length 645mmx Width 645mmWeight: Dry 55Kg Operating 92kgWarranty: Two years: parts only dependentupon cooler being installed and maintained byEcoCooling authorised Installer.Control: Cooler is supplied with standard wallcontrol with 30m control cable incorporatingspare cores for timer, alarm, thermostat andhumidistat. The control cable is fitted to thecooler and the wall control is separately packedin the cooler.Fan: 1.5kW axial

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Fixed Systems – InstallationsECPD - Down Discharge CoolersThe down discharge cooler is designed to besupported by a 645mm square plain edgedduct with a minimum up-stand of 250mm.

Extract fans are installed to provide a balancedventilation system. There is a contact in theEcoCooler control system to automatically startan extract fan. Dependent upon local waterregulations the drain is normally run onto theroof. Profiles soaker sheets are sometimesused.

All types of membrane roofs can be finishedwith an appropriately designed up-stand andweather proofing.

ECPT - Top Discharge CoolersTop discharge coolers offer a simple accesssolution. Note that the duct work must becompletely self supporting – no weight must becarried by the cooler.

The duct can be finished in either 630mmround or square duct which can be attached tothe stainless steel top element.

ECPS - Side Discharge InstallationSide discharge coolers are supported fromsimple brackets and are ideal for modern metalclad structures.

Side discharge coolers are easily fitted withsound attenuators to reduce noise levels inbuildings.

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Server Room and Data CentreCooling

Modern IT equipment is robust and has atypical environmental operating range of 10C to35C and a humidity range from 20% to non-condensing. Close control refrigerationequipment is not necessary to maintain theseconditions.

ECPCREC - The EcoCooler Computer RoomEvaporative Cooler is designed to meet thecooling needs of modern IT equipment. This isa modular system based on the standard ECPEcoCooler incorporating a patentedattemperation system.

1 – Fresh air is brought into the system though primaryfiltration and wetted filter pads2 – Evaporative cooling operates during warm periods3 – Low energy axial fan air distribution4 – Patented control system controls air supply temperature5 – Air flow is matched to density of cooling required6 – Hot and cold aisle arrangement of racks is preferred7 – Room is kept at a positive pressure8 – Ceiling void can be used for exhaust path9 – No exhaust fans are used to reduce complexity andenergy use10 – Hot air is exhausted to atmosphere

System DesignThe air flow required of the system isdependent upon the total IT load and the serverdesign. Using a typical T of 10C a singleEcoCooler CREC can support a load of 35kW.The systems can be either fixed or variableflow.

The low energy air distribution system usesaxial fans which can accommodate mostapplications. Where raised floors are used, theoverall design, in particular the floor grillnumbers and position, should reflect thepressure drops and rack cooling load density.

Most systems are controlled centrally. Thisallows fully automatic control and identificationof any fault conditions.

Server and IT operating conditionsThe following must be taken into account whenproviding a cooling solution:

Temperature: In Europe an EcoCooler canprovide 100% compliance against the latestASHRAE[1] standards and meet allmanufacturer environmental specifications.Some early main frame systems require closecontrol and evaporative cooling is not suitable.

Relative Humidity: In Europe an EcoCoolercan provide 99% compliance against ASRAEallowable conditions. Older equipment such aspaper tape and magnetic tape systems are lesstolerant and evaporative cooling is not suitable.

Dust: The filter pads provide an adequatelevel of filtration for modern IT equipment withsealed bearings and closed drives.

Redundancy – The required redundancy is metusing the modular system.

The key benefits of using EcoCoolerscompared with conventional refrigerationbased air conditioning are:

Cost• Over 90% reduction in electricity usage• Lower capital costs• Lower maintenance costs• EcoCoolers qualify for Interest free

loans from the Carbon Trust and Salixschemes.

Engineering• Low energy ventilation system• Low cost spare parts holding• No F gas compliance costs• Simple technology• Ability to cope with very hot days• Allows release of available power for

other activitiesOperational

• External access for maintenance.• No internal space used• Modular system achieves required

redundancy• Simple expansion through modular

designEnvironmental Benefits

• No refrigerants• Less than 10% of the carbon footprint

of conventional air conditioning• Can fit into Carbon Reduction

Commitment energy reduction scheme.

[1] - 2008 ASHRAE Environmental Guidelines for DatacomEquipment

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Internal Systems – ProductsEvaporative coolers can be installed internallywhere there is existing ventilation. The flowrate of ventilation should exceed the totalflow rate of the installed internal cooler.

ECPSDU – Internal Suspended Cooler

Plenum: The stainless steel plenum isdelivered with the louvers closed.

These are opened during commissioning toachieve the desired air flow patterns.

Installation patterns for suspended coolersThere are two options when locatingsuspended coolers. When complete coverageis required then the air flows from the plenumsare alternated to give an interlocking effect.

In more energy intensive operations it ispossible to identify ‘corridors’ betweenmachines and direct the air to exactly where itwill have most effect.

Hot air from the machines rises naturallythrough convection. The corridors are thenfilled with cooled air

BrominatorIn many cases the air being processed iscontaminated and requires the use of abrominator. This supplies a constant flow of0.5ppm bromine to prevent any bio-filmsdeveloping.

A single standard brominator can support up to10 EcoCoolers. It is normal to check and re-fillbromine tablets weekly. When a brominator isused waste water must be directed to a foulsewer.

ECM – Mobile Cooler

Water: Manual fill or mains supply.( 1 bar max7 bar. Minimum supply 300 L/hr. SumpCapacity 90LElectricity: 240V 50Hz. 6A start 3A runningAir flow: 7,000m3/hr

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Air DistributionWith careful design the optimum distributioncan be achieved taking into account thefollowing factors:

• Introduction of cooled air as low aspossible

• Complete coverage or spot cooling• Option of Draught free conditions

System DesignIn all cases it is important that the systems aredesigned to fall within the performance of thefan.

The characteristic pressure curve of the systemmust fall below the stall point of the fanotherwise the flow will be unstable and the flowrate can drop considerably.

8 Way PlenumMany industrial and commercial coolingsystems use an EcoCooling 8 way plenum todistribute the air.

As with all systems it is better to introduce theair as low as possible and extract as high aspossible. This creates stratification in thebuilding. 8 way plenums can be installed aslow as 3.5m.

Metal Ducted SystemsMetal systems can be either completely custombuilt or based on proprietary items. EcoCoolerscan be used for spot cooling using swirldiffusers.

Suspended CeilingsIf a suspended ceiling exists then it is possibleto use the void as a plenum chamber. Thecooled air pressurises this space and ceilingtiles are replaced by diffusers or grills to givethe desired air flow.

Windows are left open to provide naturalextraction. Window openings can be fitted withlimit switches which are linked to the timercontrol circuit. The cooler will then not rununless the window(s) is open.

Fabric DuctsThese can offer draft free conditions and arecommonly used in leisure and commercialapplications.

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Installation MethodsWarehouseA – Down Discharge EcoCoolerB – 8 Way Plenum ChamberC- Extraction Fan (80% to 90% of EcoCoolerflow rate)Doors can be left open because building ispositively pressurised

Printing WorksG – Internal Suspended EcoCoolerH- Extraction FanI – Inlet FanNote total ventilation MUST exceed flow rate ofEcoCooler

OfficeD- Side Discharge EcoCoolerE – Air Distribution through suspended ceilingCar Show RoomF- Top Discharge EcoCoolerG – Fabric duct air distribution

OfficeJ- Side Discharge EcoCoolerK – Sound Attenuator (Silencer)StoreL – Down Discharge EcoCooler

M – Metal Duct air distribution

Some factors to be considered are:• Always bring the cooled air in as low as

possible.• Does the building require positive

pressure?• What noise level is acceptable? Both

internal and external noise should beconsidered.

• Roof access and weather proofing.Sometimes the only solution is to enterthe side of the building.

• If internal systems are used theventilation system capacity must exceedthe flow rate of the internal coolers.

• Is a draught free environment required?If so, consider the use of fabric ducts.

• Consider linking the extract fans to theEcoCooler control system for automaticstart.

• Do not place the EcoCoolers close to theextraction fans to avoid re-circulation.

• Do not place the EcoCoolers close to anyvents which may exhaust contaminatedfumes.

• Consider equipment movement such asfork lifts and cranes in the building toavoid clashes with ductwork or plenums.

A

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CommissioningEcoCoolers are delivered fully assembled andonly require the connection of services and thewall controller.

There are a number of options which can beset on commissioning using a set of dipswitches in the main control panel.

1 – Pre Cool Cycle: This allows the pads tobe saturated prior to the fan starting.2- Water Bleed rate: The water bleed rate,which prevents scaling, is set at 30% which issuitable for most UK applications. This can bevaried from 18% to 46% to accommodatedifferent water properties.3 - 24hr Dry Cycle: The cooler will dry out for30 minutes during every 24 hours of continuousoperation. This can be used in certaincircumstances to improve the hygiene of thecooler.4 – Maximum Speed Setting: The fan speedcan be limited from 1340rpm to 1200rpm and1000rpm to reduce output or reduce noiselevels.5 - Stop Conditions in Automatic: There isthe option to stop completely or remain inspeed 1, vent mode during cool periods.

TestingThe test switch, on the main control panel, isused to check all operations of the cooler. Thetest sequence is:

• Fan speeds 1 to 5• Drain valve• Water inlet valve• Water level probes

All of the other functions, including thermostatand humidistat are shown on the control panelLED for testing.

MaintenanceThe maintenance regime for an EcoCooler isdetermined by:

• The total running hours• The air quality• The water quality

It is normal to maintain EcoCoolers twice peryear.

• Remove the side frames, remove theinsect screens

• Clean the CELdek pads using lowpressure water (it is common to installa hose point on the cooler water supplyso this can be done local to the cooler)

• Clean the insect screens• Manually clean the sump and the water

contact surfaces using the cleanfunction. This is started by holding the‘test’ button in for 10 seconds. TheEcoCooler then fills with water to level

3 and empties so providing acontinuous supply of water for cleaning

• The side frames can then be replacedand the EcoCooler restarted

During the winter the water should be turned offand drained to prevent frost damage.

Pad life is dependent upon the ambient airconditions. With clean air these have a life ofup to 5 years.

NoiseAn EcoCooler generates 74dB at 3m at thestandard fan speed of 1340rpm. For thepurposes of attenuator design the soundspectrum is:

Octave Noise Level63Hz 61.9125Hz 67.1250Hz 71.3500Hz 72.21KHz 73.62KHz 70.04KHz 63.58KHz 56.7

Noise can be reduced during commissioning to:• Dip Switch 6, 1200rpm max; 69dB• Dip Switch 7, 1000rpm max; 64dB

Where external noise levels have to be reducedthen the fan can be relocated into the ductwork.The fan, completed with venturi, can be locatedinto a flat plate. The template for this isavailable from EcoCooling.

Running CostsElectricity and Water are the main runningcosts of an EcoCooler. Their usage isdependent upon:

• Air temperature• Relative Humidity• Flow rate of EcoCooler

EcoCooling can provide a model which, takinglocal weather data, utility costs and runninghours, calculates the total cost.

In the UK the typical running costs averageapproximately 10p per hour per EcoCooler.This includes the cost of water and electricity.Detailed operating cost analysis, based on localweather data, can be performed using theEcoCooling Design Excel spreadsheet..

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ControlThe wall control box is supplied as standardwith EcoCoolers.

The controls are:• Power• Fan speeds 1 to 5• Cooling mode• Automatic Mode• Alarm Light

All functions are controlled using switchesconnected to the main controller usingconventional control cable. The control voltageis 12VAC.

A 30m 16 core control cable connects theEcoCooler with the wall control. The standardcable permits connection of all of the fielditems.

Alarm Light; The alarm light flashes accordingto the fault which is present.

• 1 flash – Slow Fill• 2 flash – Overflow• 3 flashes – Probe error• 4 flashes – Slow evaporation• 5 flashes – Slow drain• 6 flashes – External Alarm

Automatic Mode; In automatic mode thecontrol system monitors a thermostat every 10minutes. If the thermostat shows a closedcontact then the cooler will increase the speedof the fan by one increment up to the maximumspeed 5 with cool mode. If the thermostatshows an open contact then the cooler willdecrease the speed of the fan by oneincrement until it either stays at VENT/Speed 1or shuts down completely according to dipswitch 8 setting.

Off* Off*Vent Speed 1Cool Speed 1Cool Speed 2Cool Speed 3Cool Speed 4Cool Speed 5

Note the OFF/OFF status is only enabled byusing dip switch 8. Default is the cooler willslow down to a minimum of VENT/Speed 1.

If automatic mode is not used then the button isremoved and replaced by a blank which isprovided.

Humidistat; There is an option to use ahumidistat in Automatic Mode. This disablesthe water circulation when the set point isexceeded. All other functions are unaffected.

Timer; Any volt-free contact timer can beconnected to start and stop the EcoCooler.

Fire Alarm; A volt-free link into a fire panelwill shut the cooler down. The EcoCooler willrestart when the contact is closed.

Automatic Start of Extract Fans; A contactis available in the main control panel to start anextract fan.

Drain Pump; A 240VAC supply is available topower a drain pump where gravity drain is notpossible

LED Display; An LED on the main controlboard gives the following information:

• Alarm condition• Thermostat/Humidistat status• Timer Status• Test sequence status

Group Control; Simple control panels can bebuilt to control groups of coolers.

Link to other Control Systems; All functionscan be controlled using volt-free contacts. Thealarm signal is a pulsed 12VAC signal.

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Sizing of SystemsThere are a number of methods of determining the number of coolers required. EcoCooling provides design tools to assist with this.

Air Changes Method This is a method based on principles of ventilation. The volume of the building is calculated and a multiplier applied. This gives an hourly flow rate required from the cooler.

Typical air changes per hour are: • Offices and Shops

o 8 to 10 air changes per hour • Light manufacturing e.g. Warehouse,

packing area o 10-15 acph

• Normal manufacturing e.g. Machine shop, assembly area

o 15-20 acph 1• Heavy manufacturing e.g. Injection

moulding, welding shop o 20-30 acph

• Extreme conditions e.g. Bakery, forge o 30-40 acph

For a warehouse or factory the working volume is that underneath the discharge of the plenum chambers; as shown by the blue shaded area in the diagram below.

In smaller buildings, or where there is a low ceiling, the total volume of the building is used

Example calculation: A bakery is 20m x 24m and it is proposed to fit external EcoCoolers external units with a plenum discharge height of 3.5m.

Volume of working area: 20x24x3.5= 1860m3

Target acph: 30 Target air flow/hour: 30 x 1680 = 50,400m3/hrAir flow rate of EcoCooler; 13,000m3/hrNominal number of coolers required: 50,400 / 13,000 = 3.8 = 4 EcoCoolers

Therefore the proposal would be 4 EcoCoolers together with balanced extract to maintain a small positive pressure.

Energy Balance If the cooling load is known within the building it is possible to calculate the mass flow rate of air, at a given temperature, required to maintain a set exhaust temperature. Local weather conditions must be known to perform this calculation.

An allowance can also be made for stratification in taller buildings.

Spot Cooling The effect of a single cooler can be explained using similar principles to the air changes method. The rate of air changes can be calculated by considering a set of concentric circles with the cooled air entering the centre.

Discharge height; 4m Cooler Type; ECP Air Flow Rate; 12000cm/hr Circular area covered by cooler at the stated air changes per hour ACPH Diameter of circle 5 152.8m 10 38.2m 15 17.0m 20 9.5m 25 6.1m 30 4.2m 35 3.1m 40 2.4m

Design Excel Spreadsheet All of the above methods are included in a single Excel spreadsheet available to all installers and consultants.

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Comfort and HumidityThe purpose of many EcoCooling installationsis to improve the comfort of people. It isgenerally accepted that high temperatures leadto:

• Lower productivity• Greater level of Errors• Greater absenteeism

A correctly specified EcoCooling installation willimprove conditions and can contribute toreducing these problems.

The theory of comfort can explain why theEcoCooler can create comfortable conditions.Comfort is affected by the following:

• Temperature; An EcoCooler reducesthe temperature so improves comfortlevel

• Relative Humidity; An EcoCoolerincreases the humidity level butbecause of the low temperatures thisdoes not offset the improvementgained from the temperature reduction.

• Air movement; An EcoCoolerincreases air flow through a buildingand so improves comfort level

• Work Rate and Clothing; This is notaffected by the installation

A common question is ‘will the rise inhumidity from the EcoCooler make ituncomfortable?’

The relationship between temperature andhumidity can be explained using the concept of‘apparent temperature’. Dr RG Steadmancreated a formula to calculate the apparenttemperature which is shown below. The arrowshows the change an EcoCooler makes.

A clear conclusion is that at air temperaturesbelow 25C the RH has little effect on the

apparent temperature. This is because the skincan sweat as normal. Higher temperaturestogether with higher RH can lead to stressfuland even dangerous conditions

An EcoCooler creates more comfortableconditions by reducing the temperature. Theincrease in humidity levels does not creatediscomfort because the air temperature isbelow 25C.

CondensationWhen air is cooled to its ‘dew point’condensation will occur. A correctly designedand controlled EcoCooler installation will notcreate condensation provided the following isadhered to;

• The ventilation system must bebalanced. Air from an EcoCooler mustbe ventilated fully either withmechanical extraction or appropriatelysized vents.

• At the end of a period of cooling thesystem should run for a time inventilation mode. In Automatic modethe last part of the sequence is alwaysventilation.

• Take care with buildings which haveexisting condensation problems.During hot periods an EcoCoolerproduces air which is a similartemperature to ambient conditions inSpring and Autumn where the RH isroutinely above 90%. If a buildingcurrently has no problems during theseperiods then EcoCoolers will not createcondensation.

• The EcoCooling Excel Designspreadsheet can model the dew pointtemperatures inside buildings. Thiscan be used to evaluate the potentialfor condensation for cooler processesand buildings which are currentlysusceptible to condensation.

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EcoCooler Performance in Various Locations

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AmbientCooled AirMax AmbMax Cool

EcoCooler Performance 2008, England - London


Maximum ambient temperature 30C Maximum water use 87 l/hr

Maximum cooled temperature 20C Average water use 20 l/hr

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Legionnaires DiseaseBackgroundLegionnaires’ disease is a potentially fatal formof pneumonia caused when very small dropletsof water contaminated with legionella bacteriaare inhaled.

It is estimated that there are 20 millionevaporative cooling systems in the Westernworld [1]. There has never been a documentedcase of Legionnaires’ disease associated with awetted media evaporative cooler [2].

Specific Legislation Relating toLegionnaires’ DiseaseIn addition to the Health and Safety at Work Act(HSWA), the Control of Substances Hazardousto Health Regulations (COSHH) and theManagement of Health and Safety at WorkRegulations (MHSWR) the Health and SafetyCommission (HSC) produce an ApprovedCode of Practice (ACOP) Legionnaires’Disease: The control of legionella bacteriain water systems L8.

It is the legal duty of employers and theresponsibility of the managers of premises tocomply with the above by completing a riskassessment on all water systems..Why EcoCoolers are Safe

When a risk assessment is performedaccording to ACOP L8 there are 6 criticalelements which must be addressed:

1 - Avoidance of stagnant water: No deadlegs exist in the system so no stagnationoccurs during normal operation of anEcoCooling cooler. When a unit is switched offthe system automatically drains.

2 - Low water operating temperature: Thetemperature of the water circulating in theevaporative cooler is approximately the “wetbulb temperature” of the air passing over thefilters. In practice this means that, in atemperate climate, the water temperature rarelygoes above 20C as shown even when theambient air temperature exceeds 35C. It isgenerally accepted that Legionella is not a riskwith water temperatures less than 20C

3 - Avoidance of corrosion and scaling: Toprevent corrosion all water contact surfaces areplastic. To control scale an EcoCoolermeasures the quantity of water supplied. Whena concentration factor is reached the sumpempties automatically and replenishes withfresh water. This has the effect of preventing

scale and removing contaminants filtered fromthe air.4 - Use of Biocide (optional): Growth oforganisms filtered from the air is suppressed bysupplying the evaporative cooler with waterwith a low level of biocide from a brominator.5 - No production of aerosols: The design ofEcoCooling coolers is such that only pure waterevaporation without any production of dropletsoccurs as the air passes over the filters. Thisremoves the mechanism for the transmission ofinfections such as Legionnaires’ disease.6 - Maintenance: By the implementation of aprogrammed maintenance system, thestandards of hygiene are continued to provide asafe and secure system.

EcoCooler control systems have acomprehensive set of alarms to validate all ofthe key aspects of water process control and inparticular remove any possibility of stagnation.

• Slow water fill• Slow drain• Slow evaporation• Water probe logic failure

Generic Risk Assessment

When the above are subject to a riskassessment then it is normal for an EcoCoolerto be classified as Low Risk. This is dependentupon installation, commissioning and routinemaintenance being performed according toEcoCooling procedures.

[1] - Evaporative Air-Conditioning: Applications forEnvironmentally Friendly Cooling by Ebel Dijkstra , GertJan Bom , Marja Tummers[2] - ASHRE Guideline 12-2000 Minimising the Risk ofLegionellosis Associated with Building Water Systems

Notification of Cooling Towers andEvaporative CondensersA wetted media evaporative cooler does nothave to be registered with regard to theNotification of Cooling Towers and EvaporativeCondensers Regulations as a wetted mediaevaporative cooler does not fit into theclassification of a Cooling Tower or Evaporativecondenser.

Frequently Asked Questions.Can you catch Legionnaires’ disease from an EcoCooling Evaporative Cooler?

Has anyone ever caught Legionnaires’ disease from an evaporative cooler?

How much will it reduce the temperature?

Is the water re-circulated?

How much water and electricity does an evaporative cooler use?

How much does it cost to run?

How much maintenance is required?

How long do the pads last?

Do the pads clean the air?

Will I get condensation in my building?

Will people feel uncomfortable because of the water added to the air?

EcoCooling Contact Information:

Head Office: EcoCooling LimitedSymonds Business Park, RisbyBury St Edmunds, SuffolkUnited Kingdom IP28 6RE

Web Site: www.ecocooling.orgEnquiries: [email protected]: 00 (44) 1284 810586Fax: 00 (44) 1284 810399 © EcoCooling Limited 2010

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fresh air

low water

refreshing cool air

warm air passes

water distribution system

greater cooling

low cost cooling system

pure water