CL20 Rear Cooler - Aqua Cooling Solutions Ltd

CL20 Rear CoolerNew Generation ComputerRoom CoolingTechnical Data

Overview and PrincipleData centres are the powerhouse of today’s globaleconomy, without modern computing power appliedto all facets of today’s advanced economies, thequality of life would be very different.However great the benefits, there is one unfortunatefact that today’s data centres are highly inefficient, intheir use of energy and their subsequent effect on theglobal climate.ColdLogik replaces the traditional approach to datacentre cooling, allowing loads of up to 45kW percabinet with the added benefit of removing real estateproblems inherent with hot aisle cold aisle and aislecontainment designs.The waste heat generated by equipment within thecabinet is removed at source by water cooling, withoutthe risk of leakage in the data centre by utilising theleak prevention system.ColdLogik allows cooling water temperatures to risefrom the traditional 6ºC to between 14ºC & 21ºC;reducing chiller size and energy costs and increasingthe availability of energy efficient ‘free cooling’.The ColdLogik Management System ‘CMS’ allowsthe doors to operate individually or as a system tomaintain the room at the correct temperature evenwith external heat loads and eliminates the riskof condensation.2

The complete solutionto all your cooling needsCL20 Rear CoolerCL20 Rear Coolers are fitted to the back of anenclosure typically being IEC 297 3 and EIA STD 310compliant. The Coolers have been designed to removeheat generated by the active equipment directly atsource thus preventing hot exhaust air entering intothe room, ensuring optimum thermal and energyperformance.Ambient air is pulled into the cabinet via the activeequipment fans. The hot exhaust air produced by theactive equipment then passes over a heat exchangermatrix either by its own velocity or pulled through viaEC centrifugal fans mounted within the door; heat isthen transferred and rejected to coolant. The resultingchilled air then passes back into the room at thepredetermined room ambient temperature.The CL20 Rear Cooler is available in both passive andactive models, with the passive version relying solelyupon the active equipment fans producing enough airvolume to, in effect ‘self cool’.The CL20 Rear Cooler has a number of applicationsand fit out scenarios such as being sited withinan existing data centre, working in harmony withthe incumbent computer room air-conditioning,providing high density cooling, a reduction in energyconsumption and the removal of hot spot problems.To achieve this the Coolers can either be retrofittedto existing ‘OEM’ cabinets using an interface frameor fitted directly to a ColdLogik compliant USpace6210 cabinet.However, to gain the optimum energy performancefrom a ColdLogik solution the CL20 Rear Coolershould be deployed as a single source solution i.e.the Coolers should be used to control the entirecomputer room/data centre without the need ofany additional air-conditioning products, includingretrofit scenarios.3

Overview and PrincipleColdLogik Management System ‘CMS’The key element to controlling the room environment is theCMS; each rear cooler is intelligently managed for optimumefficiency by embedded computers that continually adjustthe operational parameters in response to the heat removaldemands placed on the system. By making continual loadadjustments the CMS Controllers maintain the room ambienttemperature.ChillerOur chiller systems use the latest technology with either high efficiency scrollcompressors or oil less magnetically driven centrifugal compressors both with highEER and ESEER energy figures. Our custom built units from 10 to 2500kW can caterfor any ambient from -40ºC to +55ºC or adverse environmental conditions. Thechillers can be supplied complete as a stand-alone package with pumps and tanksor as part of a larger system. The chiller controls communicate directly with theColdLogik system controller and can vary the water temperature as required.Free Cooling ModuleFree cooling modules can be supplied as a factory fitted extra within the chillercubicle when space is at premium or as a separate self-contained unit. All the unitsare designed to the closest ambient for the desired system water temperature whichat worse case is only 3ºC. Our free coolers are all fitted with inverter driven energyefficient fans to increase energy saving when ambient falls below the point of freecooling. A free cooling module can be fitted to an existing facility when changing froma standard CRAC to a ColdLogik system.4

The complete solutionto all your cooling needsCL20 Rear CoolerLeak Prevention System ‘LPS’The patent pending LPS works by putting the data centre loop including therear coolers on a negative pressure circuit the whole data centre is safe frompotential leaks in places where it can be least afforded. In the unlikely event saya coupling became loose or a hole was drilled into a pipe, air would be pulledinto the gap/hole, thereby preventing water from escaping. The resulting airnow in the circuit is drawn through to a tank inside or outside the chiller, whereit is finally vented out of the system and prevented from continuing backaround the loop. Inline sensors detect a pressure drop this in turn provides awarning alerting the user to the problem. Importantly the ColdLogik systemwill continue to work, with no notable effect to its cooling capabilities. As withall aspects of the ColdLogik system the LPS can be retrofitted to an existingcircuit and is modular in design and therefore scalable, so as your data centregrows so can ColdLogik.Cooling Distribution Unit ‘CL150’In many cases it is necessary to tap off an existing chiller which already supplieschilled water to other on site services at 6˚C. If chilled water from the primarycircuit were to remain at this temperature condensate would be induced withinthe coolers. The CL150 Cooling Distribution Unit ‘CDU’ has been designed toprovide close control cooling to the rear coolers eliminating the potential ofcondensate. The process side, otherwise known as the secondary circuit isa sealed pressurised system with the heat extracted from the coolers beingrejected to a raw chilled water circuit via a stainless steel plate heat exchanger.5

CL20 Rear Cooler RangeProduct DefinitionsCL20 C4 Rear CoolerAvailable in three variants; each of the C4’s arecapable of 25kW maximum ‘sensible cooling’.The performance of any coil relies upon airflowpassing over the coil matrix, but in the case of theC4 variants, which are supplied passive (i.e. noactive fans fitted as standard) they are howeverpreconfigured to allow for fans to be retrofitted.For the optimum performance an airflow of3100m³/h evenly spread over the coil is required.Most equipment manufactures are beginning toproduce increasingly energy efficient product, onearea in particular is the type of fans being used.An example of this is the new highly energy efficientDell 1U servers, which produce a negligible volumeof air. To overcome this problem the CL20 C4range is equipped to allow fans to be retrofittedpost installation.CL20 C4ncThe C4nc is the basic version of the rear cooler withno fan management system, no communicationprotocol and no coolant control, however theretrofitting of thermostatically controlled fans doesoffer some degree of room ambient air control;Fixed speed fans are also available.CL20 C4ccThe C4cc has the additional ability to control the flowrate of coolant around the coil, when combined withoptional thermostatically controlled fans the C4cc canbe programmed to control the air off temperature; thisin turn can help to control the overall room ambienttemperature. Additionally the C4cc can be set up toswitch the chiller supply water temperature to providean even greater amount of heat adjustment. Aswith the C4nc version there is no option for remotecommunication although local monitoring is possible.C. CL20 C4scThe C4sc version comes with the full ColdLogik Management Systemcontrol. Please see page 16 for full explanation.NB: One or more fans can be factory fitted to each of the above RearCoolers at point of order.6

The complete solutionto all your cooling needsCL20 Rear CoolerCL20 Rear Cooler RangeProduct DefinitionsCL20 C8sc CoolerThe CL20 C8sc is capable of a maximum 35kWof ‘sensible’ cooling and comes complete with theColdLogik Management System ‘CMS’.The C8sc is designed to run at the optimumperformance at all times, ensuring maximum energysavings. The CMS tracks the air off and watertemperatures, by doing so it is able make minoradjustments thereby ensuring the room ambienttemperature is maintained at all times.CL20 C12sc CoolerThe CL20 C12sc is capable of a maximum 45kWof ‘sensible’ cooling and comes complete with theColdLogik Management System ‘CMS’.As with the C8sc the C12sc is designed to run at theoptimum performance; even when not requiring a highdensity cooling this CL20 Cooler is the most energyefficient.ColdLogik ManagementSystem ‘CMS’The CMS lies at the heart of the ColdLogik solution.The room ambient temperature is controlled locallyby the ColdLogik Management System – it achievesthis by automatically adjusting the fan speed, waterflow rate, and, where necessary, alters the outputwater temperature from the chiller, resulting in aconsistent delivery of cooled air into the data centre,with no operator intervention. The whole process canalso be overseen and controlled at individual cabinetlevel, room level and remotely via any of the industrystandard communication protocols, allowing remoteadministration. The ColdLogik Management Systemis 2U high and can be fitted either rack mounted or ontop of the cabinet.‘CMS’ ensures that all variants of the ColdLogiksystem operates on a ‘Sensible Cooling’ principle, thatis to say ‘water above dew point’, ensuring that thesystem remains a condensate free operation.7

CL20 Rear Cooler RangeProduct DefinitionsCL20 Interface FrameOne of the biggest advantages of the CL20 Cooler isthe ability to be retrofitted onto an existing cabinet.The Interface Frame has been designed to be auniversal product, so all standard and some nonstandardenclosures can be accommodated. It shouldbe noted that the Interface Frame allows a securefixing of the rear cooler without transferring anyadditional weight to the existing cabinet.The Interface Frame brings many of the benefitsof the CL20 Cooler family but without the needto decommission old cabinets or even entire datacentres. By working in harmony with the incumbentair conditioning system many of the benefits of theColdLogik system can be realised, e.g. removal ofhot spot problems, if there is a need to increase thecabinet kW density, if the need is to reduce carbonfootprint, save HVAC energy and transfer the energyto housing more active equipment or simply tosave money.8

The complete solutionto all your cooling needsCL20 Rear CoolerZero Aisle CoolerThe CL20 Zero Aisle Cooler provides an alternativemethod to fitting a CL20 Rear cooler onto the USpace6210 Cabinet or retrofitting to OEM cabinets. Safety,convenience and space saving are the key elementsof this unique patent applied for design. Unlike ahinged door which typically takes up 600mm to800mm of aisle space the Zero Aisle cooler whichmoves from front to rear on overhead runnersand floor based wheels takes up no more than itsriginal footprint.When fully retracted the distance between the back ofthe cabinet and the rear of the cooler is an impressive900mm of clearance, allowing for near unrestrictedaccess and working space. One other impressivefeature with this system is the ability for the runnersto mount to the ceiling without fixing on top ofthe cabinet.9

Technical InformationCL20 C4 Rear Door CoolerModelRangeHeights UWidthsWeightDryWetPowerC4nc – MaxC4sc – MaxFansBackward Curved Centrifugal Fans incorporatingEC technologyAir flowSpeed rotationIP44 ratedLess than 71 dBA @ 1m sound power per fan (full load)CoilVolume capacityPressure dropFluid flowNominal performance (Sensible Cooling)Maximum performance (Sensible Cooling)Coil Delta TNominal calculations are based upon:RDC Pipe ConnectionsRecommended fittings:RDC Hoses42U & 48U600mm & 800mmOther sizes available on request63.4Kg76.0Kg110v – 8A & 240v 4A110v – 10A & 240v - 5A(Inclusive of ColdLogik Management System see page ???)0 to 5 fans1050 m 3 /hr each max100% v 3030rpm5.0 litres20* kPa2.2* m 3 /hrUp to 20 kWUp to 25 kW14°C water at full duty = 7.9°C18°C water at full duty = 6.8°C14°C water 10.4kW = 4°C18°C water 9.6kW = 3.6°C(i) air off equipment @ 48˚C(ii) maximum air off coil @ 24˚C(iii) chilled water supplied @ 14˚C(iv) return water temperature @ 21.9˚C(v) return fluid velocity 0.87m/s*Nominal figures22mm Copper pipe flow and return tailsTo suit negative pressure circuit – Male BSP to Quick Release Swivel CouplerTo suit positive pressure circuit – Male BSP or TectiteNB. Site pipework connections to suit.22mm O/D 19mm I/DTo suit negative pressure circuit - PTFE Hydraline FX (smooth bore)with stainless steel overbraidTo suit positive circuit - EPDM Rubber with stainless steel overbraid10

The complete solutionto all your cooling needsCL20 Rear CoolerCL20 C4 Coil DutykW30.025.020.015.010.05.00.020 22 24 26 28 30 32 34 36 38 40 42 44 46 48Server Exit Temperature ˚C18kW Duty @ 18˚cwater supply @ 2.2m³/hr flow rate with air flow2400m³/h20kW Duty @ 14˚cwater supply @ 2.2m³/hr flow rate with air flow2400m³/h25kW Duty @ 14˚cwater supply @ 3.85m³/hr flow rate with air flow3100m³/hNominal Duty2 Row CoilAir flow 2400 m³/hrPressure drop overcoil kPa2014˚C Chilled Water@ 2.2m³/hr flowEnergy Efficient2 Row CoilAir flow 2400 m³/hrPressure drop overcoil kPa2018˚C Chilled Water@ 2.2m³/hr flowMaximum Duty2 Row CoilAir flow 3100m³/hPressure drop overcoil kPa4114˚C Chilled Water@ 3.85m³/hr flowServerexitDutyAir-offcoilServerexitDutyAir-offcoilServerexitDutyAir-offcoil˚C kW ˚C20 3.5 15.722 4.6 16.324 5.8 16.826 6.9 17.428 8.1 18.030 9.3 18.532 10.4 19.134 11.6 19.636 12.8 20.238 14.0 20.840 15.2 21.342 16.4 21.944 17.6 22.546 18.8 23.048 20.0 23.6˚C kW ˚C20 2.5 18.322 3 19.224 3.6 19.726 4.8 20.228 6.0 20.830 7.2 21.432 8.4 21.934 9.6 22.536 10.8 23.038 12.0 23.640 13.2 24.142 14.4 24.644 15.6 25.246 16.8 25.748 18.0 26.3˚C kW ˚C48°C 25.1 24°C11

Technical InformationCL20 C8 Rear Door CoolerModelRangeHeights UWidths42U & 48U600mm & 800mmWeightDryWetPowerC8 - MaxFansBackward Curved Centrifugal Fans incorporatingEC technologyCurrent consumption eachAir flowSpeed rotationIP44 ratedLess than 71 dBA @ 1m sound power per fan (full load)CoilVolume capacityPressure dropFluid flowNominal performance (Sensible Cooling)Maximum performance (Sensible Cooling)Coil Delta TNominal calculations are based upon:RDC Pipe ConnectionsRecommended fittings:RDC Hoses63.4Kg76.0Kg110v – 10A & 240v - 5A(Inclusive of ColdLogik Management System see page ???)5 fans0.8A max1050 m 3 /hr each100% v 3030rpm5.0 litres37* kPa3.6* m 3 /hrUp to 30 kWUp to 35 kW14°C water at full duty = 7.2°C18°C water at full duty = 6.35°C14°C water 10.4kW = 3.7°C18°C water 9.6kW = 2.96°C(i) return water temperature @ 21.2˚C(ii) return fluid velocity 1.42m/s*Nominal figures22mm Copper pipe flow and return tailsTo suit negative pressure circuit – Male BSP to Quick Release Swivel CouplerTo suit positive pressure circuit – Male BSP or TectiteNB. Site pipework connections to suit.22mm O/D 19mm I/DTo suit negative pressure circuit - PTFE Hydraline FX (smooth bore)with stainless steel overbraidTo suit positive circuit - EPDM Rubber with stainless steel overbraid12

The complete solutionto all your cooling needsCL20 Rear CoolerCL20 C8 Coil Duty40.035.030.025.020.015.010.05.026.6kW Duty @ 18˚cwater supply @ 3.6m³/hr flow rate with air flow3770 m³/h30kW Duty @ 14˚cwater supply @ 3.6m³/hr flow rate with air flow3770m³/h35kW Duty @ 14˚cwater supply @ 5.35m³/hr flow rate with air flow4400m³/h0.030 32 34 36 38 40 42 44 46 48Server Exit Temperature ˚CNominal Duty2 Row CoilAir flow 3770 m³/hrPressure drop overcoil kPa3714˚C Chilled Water@ 3.6m³/hr flowEnergy Efficient2 Row CoilAir flow 3770 m³/hrPressure drop overcoil kPa3718˚C Chilled Water@ 3.6m³/hr flowMaximum Duty2 Row CoilAir Flow 4400m³/hPressure drop overcoil kPa6814˚C Chilled Water@ 3.85m³/hr flowServerexitDutyAir-offcoilServerexitDutyAir-offcoilServerexitDutyAir-offcoil˚C kW ˚C30.0 14.1 18.932.0 15.9 19.534.0 17.7 20.136.0 19.4 20.738.0 21.2 21.340.0 23.0 21.942.0 24.7 22.544.0 26.5 23.146.0 28.3 23.748.0 30.0 24.3˚C kW ˚C30.0 10.6 21.632.0 12.4 22.234.0 14.2 22.836.0 15.9 23.438.0 17.7 24.040.0 19.5 24.642.0 21.3 25.244.0 23.0 25.846.0 24.8 26.448.0 26.6 27.0˚C kW ˚C48 35 24.513

Technical InformationCL20 C12 Rear Door CoolerModelRangeHeights UWidthsWeightDryWetPowerC8 - MaxFansBackward Curved Centrifugal Fans incorporatingEC technologyCurrent consumption eachAir flowSpeed rotationIP44 ratedLess than 71 dBA @ 1m sound power per fan (full load)CoilVolume capacityPressure dropFluid flowNominal performance (Sensible Cooling)Maximum performance (Sensible Cooling)Coil Delta TNominal calculations are based upon:RDC Pipe ConnectionsRecommended fittings:RDC Hoses42U & 48U600mm & 800mmOther sizes available on request65.8Kg78.0Kg110v – 10A & 240v - 5A(Inclusive of ColdLogik Management System see page ??)0 to 5 fans0.8A max1050 m 3 /hr each100% v 3030rpm7.4 litres17* kPa3.25* m 3 /hrUp to 40 kWUp to 45 kW14°C water at full duty = 12.7°C18°C water at full duty = 11.2°C14°C water 10.4kW = 7.45°C18°C water 9.6kW = 5.99°C(i) return water temperature @ 26.6˚C(ii) return fluid velocity 0.72m/s*Nominal figures22mm Copper pipe flow and return tailsTo suit negative pressure circuit – Male BSP to Quick Release Swivel CouplerTo suit positive pressure circuit – Male BSP or TectiteNB. Site pipework connections to suit.22mm O/D 19mm I/DTo suit negative pressure circuit - PTFE Hydraline FX (smooth bore)with stainless steel overbraidTo suit positive circuit - EPDM Rubber with stainless steel overbraid14

The complete solutionto all your cooling needsCL20 Rear CoolerCL20 C12 Coil DutykW50.045.040.035.030.025.020.015.036kW Duty @ 18˚cwater supply @ 2.75m³/hr flow rate with air flow5075 m³/h40.7kW Duty @ 14˚cwater supply @ 2.75m³/hr flow rate with air flow5075m³/h45kW Duty @ 14˚cwater supply @ 5.2m³/hr flow rate with air flow5075m³/h10.05.00.030 32 34 36 38 40 42 44 46 48Server Exit Temperature ˚CNominal Duty3 Row CoilAir flow 5075 m³/hrPressure drop overcoil kPa1714˚C Chilled Water@ 2.75m³/hr flowEnergy Efficient3 Row CoilAir flow 5075 m³/hrPressure drop overcoil kPa1718˚C Chilled Water@ 2.75m³/hr flowMaximum Duty3 Row CoilAir Flow 5075m³/hPressure drop overcoil kPa3514˚C Chilled Water@ 5.2m³/hr flowServerexitDutyAir-offcoilServerexitDutyAir-offcoilServerexitDutyAir-offcoil˚C kW ˚C30.0 19.1 18.832.0 21.5 19.434.0 23.9 20.036.0 26.3 20.638.0 28.7 21.240.0 31.1 21.842.0 33.5 22.444.0 35.9 23.046.0 38.3 23.648.0 40.7 24.2˚C kW ˚C30.0 14.4 21.632.0 16.8 22.234.0 19.2 22.836.0 21.6 23.438.0 23.9 24.040.0 26.4 24.542.0 28.8 25.144.0 31.2 25.746.0 33.6 26.348.0 36.0 26.9˚C kW ˚C48 45 21.615

Technical InformationColdLogik Management SystemFeaturesThe CMS is configurable to suit each individualinstallation.• Coolant flow control (0-10v)• Integral 24v AC motorised valve supply• 0-10v & 5v PWM EC fan control• Single or dual bank fan speed control• Fan periodic functionality test• Chiller regulation based on room values andset point• Industry standards thresholds and differentialson all user definable parameters• Dual and single power supply change over option• Valve (Coolant) opening monitoring• Return water monitoring• Individual fan monitoring• Single or dual bank fan speed monitoring• Standard communication protocols Modbus,Transparent Local Area Network ‘TLAN’ & Fieldbussystem (all other industry standards available)• Chiller regulation monitoring• Full status monitoring via network• Network BMS or voltfree contact connections• Room monitoring• Valve open alarm• Individual Fan fail Alarm• Common alarm (BMS & Volt free contact)• Local door alarm indicator, colour change on LOGO• Power fail alarm• Leak prevention alarm• High & low temperature alarm• User definable periodic preventative maintenancealarms• Full alarm log (requires commissioning tool orsystem monitoring to access)• User definable time delays on alarm functionsSystem Options• Programming key for simplistic transfer ofcommissioning data to another CMS• Local Individual Cabinet display screen• System display monitor & log up to 200 CMS• System monitoring software (PC based)• Commissioning tool• Any industry standard protocol network cardsPower• 110-240v 2A-1A Max input• ColdLogik Management System IEC C13 input16

The complete solutionto all your cooling needsCL20 Rear CoolerCL20 Rear Cooler Product GuideThis Documenta. This is not a controlled document.b. Distributed copies will not be updated.c. This document has been designed for viewing as a PDF file and double sided printing (subject to copyright –see below) for a hard copy.d. Copies of this document can be obtained from Aqua Cooling Solutions.Copyright NoticeThe confidential information contained in this document is provided solely for use by Aqua Cooling Solutionsemployees and system owners, and is not to be released to, or produced for, anyone else. Neither is it to beused for reproduction of this unit or any of its components. All specifications are nominal and subject to changewithout prior notice as design improvements occur.DisclaimerAqua Cooling Solutions shall not be liable for any damages resulting from miss- application or misuse of itsproducts.General StatementQuality Management SystemProduct is manufactured to ISO 9001:2008 Quality management standards. This standard covers allmanufacturing areas and associated processes.Product StandardsUnless otherwise stated products marketed and supplied by Aqua Cooling Solutions, when installed and operatedin accordance with Aqua Cooling Solutions instructions, conform to EMC directive and essential Health andSafety requirements of the Machinery Directive 91/368/EEC93/44/EEC & 93/68/EEC. This includes the EMCcompatibility directive 89/336/EEC. As standard, units comply with an IP21 rating. The standards are also metwhere compliance to TUV, UL CE and CSA are specific market requirements attained for that product.17