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Product BrochureUnderfloor Air ConditioningDENCO -OfficeCoolThe future of high-performanceair conditioning
High level, high26 Ctemperature return airback to the Zone Unitto complete the cycle12 –16 C2Conditioned airunder the floorPR-2013-0008-GB · Subject to modification · R2-01/2016
DH-Points No requirement for large plant rooms Individual control of local environment System redundancy Office space quickly and easily adaptedfor new occupants Construction savings Quiet operation Energy savings Installation can be deferred untilfinal build/let Easy to design Quick easy office modifications possible Quick installation Reduced “slab to slab” height24 COccupants control theirown local environmentdepending on their needs20 CMixed air supplyfrom LECU to roomat low velocityPR-2013-0008-GB · Subject to modification · R2-01/20163
Air Handling Units (AHUs)ChillersBMS or Standalone Control SystemDENCO -OfficeCool components and connectionsComplete system solutionsZone UnitThe Zone Unit provides the primary air conditioning to its zone, with each zone measuring up to 300 m2.Zone Units are draw through vertical type, either top return (Downflow) or bottom return (Upflow) supplyingconditioned air into a raised floor void. Zone Units have all necessary components such as filters, cooling coils,control valves, microprocessor controllers, and EC fans to achieve the required u nderfloor condition with themaximum efficiencies. Options include heating (electrical, low-pressure hot water, or direct expansion),dehumidification and humidification using water vapour. Zone Unit configuration can be either top returnbottom discharge or bottom return bottom discharge, and are available in three standard sizes (from7 kW – 30 kW). Other sizes are available on request.4PR-2013-0008-GB · Subject to modification · R2-01/2016
Zone UnitLECUsLocal Environmental Control Unit (LECU)Each Zone Unit is connected to up to 35 LECUs, which gives the DENCO-OfficeCoolAir Conditioning System the exceptional ability to cope with changing o ffice layoutrequirements. The LECU is an intelligent fan tile, easily positioned anywhere in theraised floor and provides the user with control over their “micro-climate”. Each LECUincludes a fan, a modulating damper and intelligent controller with the option of anelectrical heater and will maintain the locally desired set temperature by re-circulating avarying mixture of air from the room and conditioned air from under the raised floor.Air Handling Unit (AHU)The AHU is sized to meet the fresh air requirements of the offices and delivers the freshair to the return air side of the Zone Unit.ChillerThe Chiller is sized to meet the cooling requirements of the entire building.PR-2013-0008-GB · Subject to modification · R2-01/20165
5671231244124442126Zone Unit3LECU4Return air grilles5AHUCeiling grille6Heat pump7ChillerPR-2013-0008-GB · Subject to modification · R2-01/2016
The DENCO -OfficeCool concept –designed to users specificationsConfigurations for every room size,every requirement and conditionExternal plant spaceThe heat rejection equipment, such as Chillers, Heat Pumps and Air Handling Unitscan all be installed externally.Bottom air supply and return (Upflow type Zone Unit and LECU)Where no ceiling is installed or where the integrity of the space above the raised flooris important, the Zone Unit supplies and returns the air within the access floor space.This space is simply divided into supply and return air plenums with underfloor b arriers.Cooling and heating can be provided by chilled water and low pressure hot water orby heat pumps. The space is conditioned by the Zone Unit, and the LECUs provide theoccupants with the ability to control their space.Benefits at a glanceBottom air supply and high level return(Downflow type Zone Unit and LECU)The Zone Unit supplies conditioned air into the access floor void and hot air is returned tothe Zone Unit at high level. Cooling and heating can be provided by chilled water and lowpressure hot water or by heat pumps. The space is conditioned by the Zone Unit, and theLECUs provide the occupants with the ability to control their space.Bottom air supply and ceiling return(Downflow type Zone Unit and LECU)The Zone Unit supplies conditioned air into the access floor void and hot air is returned Almost cost free relocationcapability Exceptionally quietoperation Local environment controlfor individuals Control of temperatureand humidity for a healthierenvironment Filtration of both freshto the Zone Unit through a suspended ceiling. Cooling and heating can be provided byair and re-circulated air forchilled water and low pressure hot water or by heat pumps. The space is conditioned bya healthier environmentthe Zone Unit, and the LECUs provide the occupants with the ability to control their space.Conditioning by external Air Handling Unit (AHU and LECU)The air conditioning of the space can be done by an externally mounted Air HandlingUnit, which supplies conditioned air through ducts into the access floor. The hot air is Economical operation Easy maintenance withall services at low level inthe raised floor Elimination of draughtsreturned to the Air Handling Unit through the ceiling and duct system. The LECUs providethe occupants with the ability to control their space.PR-2013-0008-GB · Subject to modification · R2-01/20167
ComponentsZone Unit and LECUControls Several controller options available Standard controller pC05 All units can be fitted, as an option,with a Trend interface Various interfaces for buildingmanagement systems, etc. Monitoring displaySensors Water sensor (optional) Sensors for measuring air conditionFilter High-quality EU4Z-Line filter F7 filters, EU7 and washablefilters are also available Differential pressure switch in themicroprocessor control systemindicates necessary filter changeSteam humidifier(optional) Proportional controlZone Unitelectrode steam humidifier Microprocessor control with alarmand diagnosis unit8PR-2013-0008-GB · Subject to modification · R2-01/2016
Cooling coilsLECU and components CW or DX multi-row constructed Inclined, high performance coil withGrilles Rectangular grillesrippled aluminium fins, spaced at 1.8 mm. Aluminium intermediate drip tray witha stainless steel condensate drain traywith U trap 4 row and 6 row coils availableFan section Single forward curved centrifugal fan Integrated single IP 44 closedtype central electric motor Both AC and EC versions are availableFilter (optional)Heating Low pressure hot water, G2 filter in sheet metal frameElectric heater 500 W electric heaterwith coils constructed of3/8" OD copper tube, and mechanicallybonded aluminium fins In heat pump installations, reverse cycleheat pump provides heating through theevaporator/condenser coil Electric Heating (optional), with stainlessControl systemand accessories Handheld IR Remote Controller withIR Receiver PCB LED display with ability to changeair-flow or set pointsteel fins on heating elements and overtemperature thermostatic safety cut outComponents PlantWatch Pro touch screen display PlantVisor for remote system monitoringEC Fans Direct driven variable speedhigh efficiency EC plug fan with 7 backwardcurved three dimensional profiled blades Impeller optimally balanced according toISO1940 and fan speed modulates onstandard settings Variable speed regulation is performedusing a 0–10 V controller signalChilled water control valves Continously modulated2- or 3-way valves Provided with vapourLECUsealed insulationPR-2013-0008-GB · Subject to modification · R2-01/20169
Technical dataEnergy savings, carbon footprintand cost-efficiencyTechnical data indoor unitSelectionGross total capacityGross sensible capacityDehumidification capacityGeneralNumber of filters [Type]EER efficiency ratioHeat exchanger face areaCoolingRefrigerant typeRefrigerating circuitsPressure equipment directive categoryFan2NumberAir volume flowAir volume flowExternal static pressurePower consumptionHumidifier (optional)Humidification capacityPower consumptionHeater (optional)Heating capacityCurrent consumptionHeaterHeating capacityHot water volume flowPressure drop heatingElectricalPower consumption cooling modeCurrent consumption cooling modeCurrent consumption max.ConnectionsCooling - In OutLPHW - In OutHumidifier water feedWater drainH-Version Split SystemSize 010Size 018Size 030Size 8m²2 [G4]4.290.331R410A1SEP2 [G4]2 [G4]4.274.280.580.95Direct Expansion CoolingR410AR410A11SEP23 [G4]2.441.42R410A1 or .12.929Inchmmmmmm5/8" 5/8"20 20152214,3201.20500.3Electrode boiler382.36via Modulating electric heating698.713.1via Low pressure hot water (40 C / 60 C)11.118.20.490.843400 V / 3ph / 50 or 60Hz3.75.957.721435/8" 3/8"20 20152x225/8" 7/8"25 251522861217.426.51.16215.419.9722 x 5/8" 2 x 7/8"32 321522Technical data outdoor unitSelectionNumber of outdoor unitsElectrickWPower consumptionACurrent consumptionACurrent consumption max.ConnectionsInchLiquid lineInchSuction line1. Return air 26 C / 50% R.H. Ambient Air 35 C2. Nominal Airflows101 outdoor unit22.483/8"5/8"1 outdoor unit1 outdoor unit400 V / 3ph / 50 or 60Hz3.45.64.478243/8"5/8"1 or 2 outdoor units3/8"1"PR-2013-0008-GB · Subject to modification · R2-01/20167.59.5241/2"1"
Energy comparison DENCO -OfficeCoolvs traditional FCU and AHU modelDesign advice provided by local Denco-OfficeCoolspecialist office. Specifications and unit schedulesprovided by local DencoHappel office for inclusion into600Costs in design schedules. Life cycle cost analyses (LCCA) canbe provided on request. Full selection carried outby local Denco-OfficeCool specialist office. DX, heatpump and AHU selections provided on request.4002000nJab ar pr ay nFe M A M JuDENCO-OfficeCoollJug pvctAu Se Oc No DeTraditionalO-Version Chilled Water SystemSize 010Size 018Size 030Size 0457.96.41.513.611.12.62318.64.434.327.66.72 [G4]48.950.332 [G4]44.660.582 [G4]64.370.953 00.5Chilled WaterCooling medium volume flow m³/hUnit pressure losskPaMaximum operating pressure barEC Plug Fan32.3417.460.2620.20.583/4 3/420 201522-Electrode boiler382.36via Modulating electric heating698.713.1via Low pressure hot water (40 C / 60 C)11.118.20.490.843400 V / 3ph / 50 or 60Hz0.30.40.70.88171 120 20152x221-1/4 1-1/425 251522861217.426.51.1620.51181-1/2 1-1/232 321522--400 V / 3ph / 50 or 60Hz----PR-2013-0008-GB · Subject to modification · R2-01/2016--11
LECU operation and controlFor flexible office conceptsCooling modeCooling modeIf the room sensor detects that the localreturn air sensorraised modularfloorchosen tempindependentcontrollertemperature is too warm, it interrogates theunderfloor sensor. If the underfloor temperature is below that of the room air, thedamper is modulated open to allow coolingto the space. The damper is modulatedheater(optional)sufficiently to offset the heat gain to thefanfully modulatingdamperfloor voidsensorspace.Heating modeIf the room sensor detects that the localHeating modetemperature is too cold, it interrogates thereturn air sensorraised modularfloorchosen tempindependentcontrollerunderfloor sensor. If the underfloor temperature is above that of the room air, thedamper is modulated open to allow heatingto the space. The damper is modulatedsufficiently to offset the heat loss to theheater(optional)space.fanfully modulatingdamperfloor voidsensorRecirculation modeWhen the room sensor detects that the localtemperature matches the set point, theRecirculation modedamper will be closed and the unit will bereturn air sensorraised modularfloorchosen tempindependentcontrollerin recirculation mode. An adjustable bleeddamper allows sufficient air from the floorvoid to provide the fresh air requirements forthe space.heater(optional)Electric heater mode (optional)fanfully modulatingdamperfloor voidsensorUnder exceptional circumstances, if the roomsensor detects that the local temperature istoo cold and upon interrogation of theunderfloor sensor it is determined that thereElectric heater modeis insufficient heat available, the controllerreturn air sensorchosen tempwill modulate the damper fully closed andinitiate the electric heater battery. The heaterwill be on until such time that either theunder floor temperature increases sufficientlyto meet the heating requirement, or theheater(optional)12raised modularfloorindependentcontrollerroom temperature increases to the set point.fanfully modulatingdamperfloor voidsensorPR-2013-0008-GB · Subject to modification · R2-01/2016
Local Environment Control Unit (LECU)The LECU gives the DENCO-OfficeCool Air Conditioning System an exceptional abilityto cope with the changing work space layout requirements. It is an intelligent fan tile,easily positioned anywhere in the floor of any work space. The LECU operates at 0-10volt (although AC versions with 3 selectable fan speeds are available) and an adjustableset-point to meet users requirements. It maintains the locally desired set temperatureby re-circulating a varying mixture of air from the room and conditioned underfloor air.The LECU has its own frame and can be used with stringerless raised floors. It e xactlymatches a 600 x 600 raised floor panel and only weighs 18 Kg. R elocation of LECUscan be accomplished in minutes and enables the DENCO-OfficeCool Air C onditioningSystem to adapt to your changing work space layout.Adjustment of the LECU operation is available in different forms. At its simplest,adjustment of the set point and fan speed can be done directly via an infra red,hand-held remote control or the optional display mounted on the LECU.The Building Management System (BMS) allows monitoring or adjustment of the setpoint and fan speed as well as monitoring of the entire system using selectablevariables. When the LECU and the Zone Units are networked, the Zone Unit can becontrolled by the average of the readings on the room sensors of the LECUs within anyparticular zone.PR-2013-0008-GB · Subject to modification · R2-01/201613
Control configuration possibilitiesUnder what conditionswhich configuration is used?Zone Unit 2Zone Unit 1Zone Unit 3On Floor TouchScreen GroupControllerRS 485Field CardSerial CardRS 485Field CardSerial CardRS 485Field CardSerial CardData CableBuilding ITinfrastructureLECU 1LECU 1LECU 1LECU 2LECU 2LECU 2Control System / BMS5 m networkcable suppliedwith eachLECUIntranet /InternetLECU 1514LECU 15LECU 15Remote access oruser terminal accessPR-2013-0008-GB · Subject to modification · R2-01/2016
On Floor TouchScreen GroupControllerA fully linked control system provides communicationbetween end users and individual LECUs. With inte -Linked Zone UnitControllersgration possible between the building s own BMSand/or a purpose built control system just for DENCOOfficeCool.DencoHappel’s own purpose written software allowsfor seamless communication of all DENCO-OfficeCoolZone Unit Field CardsBuilding ITbackboneswitchcomponents, with data logging, alarm warnings asstandard. User input is possible from many locationsfor ease of access, quick and easily adjustable tempe rature settings for maximum flexibility and comfortStandard ethernet cable RJ45for all.Other options for layout and operationThere are a number of additional features which allow the users to get the maximum benefit from theDENCO-OfficeCool Air Conditioning System. An onfloor touch screen group controller, or IQView 8, canbe installed in the system. These provide a “mini-headend” capability for smaller installations that have noBMS, or where a BMS is installed, it provides tenants,or users, with the control over the equipmentinstalled at floor plate level.Standalone Control SystemPR-2013-0008-GB · Subject to modification · R2-01/201615
Dimensional drawings and technical dataZone UnitDownflow versionModel sizeUpflow versionZD 10ZD 18ZD 30ZD 45ZU 10ZU 18ZD 30ZD 45Weights and dimensionsWeightkg110180270340125195285355Height (H)mm1,9401,9401,9401,9402,2162,2162,3162,466Width (W)mm6008001,1801,6709041,3041,6842,374Depth (D)mm600600780780600600780780Upflow air configuration (bottom supply, bottom return)ZD 30ZD 30WidthWidthDepthZD 45ZD 45WidthDepthHeightZD 10/18HeightZD 18HeightZD 10DepthWidthDownflow air configuration (bottom supply, top return)ZD 18WidthWidthZD 10/18ZD 30ZD 45ZD 30/4516DepthHeightHeightZD 10WidthDepthWidthPR-2013-0008-GB · Subject to modification · R2-01/2016
LECULECUWeights and dimensionsWeight15 kgHeight (w/o grilles)229 mmWidth frame595 mmDepth frame595 mmWidth489 mmDepth556 mmLECU 230mmECCooling mode, 0Pa pressureVoltageVVolume flowm3/hPower consumptionWCurrentANoise pressureNR*Noise .1932549.4480350.27365710 (max.)491380.343758Noise pressureNR*Noise powerdb(A)ACStepCooling mode, 0Pa pressureVolume flowm3/hPower tA3 (max.)500570.25Optional:Electrical heater500W heating power2.2Cooling capacityca. kWAream²Amount ofLECUsTo calculate approximate number of Zone Units:No. of Zone Units total load / approx. capacity10550318101005302020010453030015*in 3 m distanceRule of ThumbZone Unit sizePR-2013-0008-GB · Subject to modification · R2-01/2016To calculate approximate number of LECUs:Number of LECUs supply airflow / 0.11To double check the number of LECUs:Number of LECU floor plate area / 15 m²17
Your benefitDENCO-OfficeCool is a very modularsolution with systematic sophistication,which promises the following: made-to-measure and space-savingclimate control with maximum reliabilityand energy-efficiency.Certificates Quality Assurance –EN ISO 9001:2008 CE marking for all EUrelevant products Safety of Machinery:QualityAlways focusingon the customerEN 60204-1:2006 A1:2009 Safety of Machinery:N ISO 12100-1:2003 Safety of Machinery:EN ISO 12100-2:2003 EMC Emissions: EN 61000-6-3:2007 EMC Immunity: EN 61000-6-2:2005 Refrigeration Systems:EN 378-1/2/3/4:2008Quality management from development to after-salesWe, the DencoHappel experts for climate and environment solutions, are the Europeanmarket leaders for the entire spectrum of air treatment. Quality is one of our keysuccess factors. Looking back on more than 100 years of experience we have conti nuously improved and optimized our products and business operations, keeping onecentral goal in focus: Exceeding our customers expectations. ASME 918PR-2013-0008-GB · Subject to modification · R2-01/2016
Production facility in Wuhu, ChinaFactory in Wurzen, GermanyLooking inside the DencoHappelsite at Hereford, UKAerial photograph showing the factoryProduction facility in Pune, IndiaThe Turkey location in Istanbulin Liberec, Czech RepublicManufacturing CentersAir treatment competencearound the globeOver the past 100 years the DencoHappel experts for room climate solutions haveestablished an international network of manufacturing sites. Centers of excellencefor air handling units, close control units, decentral air treatment, and clean rooms arelocated in s everal countries throughout Europe and Asia. All of them deal constantlywith the continuous improvement in production processes and optimization accordingto the latest international standards. With a clear focus on standardization, all sites can Global approachInternational quality standardsConstant improvementFlexible standardizationJust in time productionCustomer in focusassure a high level of production flexibility. Furthermore, just in time production withshort delivery times helps fulfil customer requirements. With integrated research anddevelopment facilities, we are able to handle even the most technically demandingprojects. One of our special skills is advanced kn
4 PR-2013-0008-GB · Subject to modification · R2-01/2016 Chillers Air Handling Units (AHUs) BMS or Standalone Control System DENCO -OfficeCool comPonents and connections Complete system solutions Zone Unit The Zone Unit provides the primary air conditioning to its zone, with each zone measuring up to 300 m2. Zone Units are draw
