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LG VRF APPLICATIONforAIR HANDLING UNITDx Coils

VRF AHU Dx Coils Ventilation and conditions Basic on AHU designing and selection– Weather conditions– Air quality/comfort conditions Dx application and components LG VRF AHU Dx solutions– HEX (coils) structure: single, multiply– Refrigerant flow control: EEV, TEX Control solutions

VRF AHU Dx CoilsWeather statistic average temperature and Relative humidity in MontenegroPodgorica

VRF AHU Dx CoilsSolutions: Fresh Air SupplyFresh Air supply heating/Cooling loadHealth & ComfortThe increase of living in closed space and concentration of polluted material gives badeffect on human health.Gas-phaseParticleGas-phase pollutedpolluted materialmaterialParticle pollutedpolluted materialmaterialMaterial Main reasonHealthMaterialMain reasonHealthDustoutdoor air , clothesallergyMite’s excretion,fiber particlecarpet,pet,food scrap ,miteallergytobaccolung cancer, etc.Bacteriapeople, outdoor airindoor air pollution indexCO2body, combustionno direct harmfulnessexcept high concentrationCOatmosphere pollution,tobaccodeadly poisonous eventhough low concentrationNO2atmosphere pollution,tobaccolung stimulationHCHOveneer boardadiabatic materialeye,skin re pollutioneye,skin,mucousmembrane stimulationO3radiation,Atmosphere pollutioneye,skinupper airway stimulationMoldconstruction material,outdoor airallergyRnsoil,stone,underground waterlung cancerPollenoutdoor airallergyodorbody,tobaccoheat/cooling systemdiscomfortAsbestosadiabatic materiallung cancer,skin diseasetumor,etc. Smoke

VRF AHU Dx CoilsAir quality and VentilationCR 1752, EN 152511. Demand by person, and Function/Category2. Air quality - ventilationEfficiency of ventilationAir flow demand

VRF AHU Dx CoilsSelection Complex Solution by air quality concerning building load calculationHeating/cooling loads involved with a building include outside attributes such as external temp, solar radiation,wind and humidity as well as inside attributes such as human heat, heat from lighting and electronicappliances, in addition to loads generable thru exterior walling structure and windows of the building. Sucharchitectural/environmental elements cause heating/cooling loads to take place.External tempWindHumiditySolar radiationOutdoor unitHeat transferHeat from human,lighting, devicePipe/duct systemIndoor unitBased on indoorTemp/humidityBuilding loads (q)Cool(heat remove)heat(heat added)Heat lossSystem processHeat lossSystem functionEfficiency lowered

VRF AHU Dx CoilsDesigning gnDesign HumidityHumidityCleannessCleannessAirAir currentcurrent17 28 40 70 %Floating dust: 0.15 mg/ CO: 10 ppmCO2: 1000 ppmUnder 0.5 m/sSummerWinterOrdinary building(office/residence)26 , 50 %22 , 50%Commercial building(bank/department)26 , 50 %21 , 50%Industrial building(factory)28 , 50 %20 , 50%CO2 StandardIndoor design spec.1,000 ppmOutdoor design spec.350 ppmCategoriesCoolingHeatingAir velocity(m/s)0.1 0.250.13 0.181.7 2 Gap betweenup and downding to different countries, these regulations might be different

VRF AHU Dx CoilsTo calculate/estimate capacity of HVAC system, in either individualized or centralized system, considerationsshall be taken on loads required in terms of building load, heat source system, distribution system & airconditioning system.Cooling load subject to externalTemp/building characteristicsBuilding loadCapacity of outdoor unitConsidering system functionsArrangement of indoorunit For better coolingTerminal UnitDistributionHeaderSolar Roof Wall Glass windowHeat sourceChiller35 OutsideAHU24 RemoveloadFCU/convector Ext air entry VentilateHuman light, equipment Lighting Human body EquipmentRemoveloadBoilerHeat pumpIDURefrigerantpipe

VRF AHU Dx CoilsVentilationVentilation TypeType 11Exhaust FanSupply Fan Supply Fan and Exhaust Fan. The pressure in the room can becontrolled by two fans.IndoorVentilationVentilation TypeType 22 Fresh outdoor air is mechanically supply.Supply FanIndoorNaturalExhaust The room is in positive pressure. (ex.surgery theatre,clean room)VentilationVentilation TypeType 33NaturalSupplyIndoorExhaust Fan The stale air in the room ismechanically discharged. The room is in negative pressure. (ex.kitchen, bathroom)

VRF AHU Dx Coils

VRF AHU Dx Coils

VRF AHU Dx Coils

VRF AHU Dx CoilsHEATING: different concept – different energy consumptionHEATING: different concept – different initial cost%40Temperature [ C]%405%10 %15 %20%25%30%Temperature [ C]40%5%10 %15 %20%25%30%Temperature [ 42/m³]320ir [kg1201.5041001.522801.54601.561.58 51.601.6121.641.661.68051%1.36Den1.3% sity0 o%f mois0tu% 0 % 90 % 00 % 417 red a862010504051.40[k J/ 60100%1.62 122025303540Absolute moisture content [g/kg]1.602402061.56180151.54200101.52 21.5814051601.740Air pressure: 1,013.3 hPaMontenegroWinter comfort range[DIN EN 13779:2004]51.501001.701.724001.681.36Den1.3% sity0 o%f mois0tu% 0 % 90 % 00 % 4 4417 red 20-2-4-6-8-10-12-14-16MontenegroWinter comfort range-18Air pressure: 1,013.3 hPa[DIN EN 13779:2004]-20152025303540Absolute moisture content [g/kg]501201.661.48601.641.4620201.62 11.4440401.601.4280601.561.403[k J/ 002601.501.58220120[k J/ kg]1401.4818016042001.462401.442801.422/m³]320ir [kg3401.36Den1.3% sity0 o%f mois0tu% 0 % 90 % 00 % 417 red 220181614121086420-2-4-6-8-10-12-14-16-18-20heat recovery – no humidification – heatingTotal heat transfer – Enthalpy HEX5%10 %15 %20%25%30%heat recovery – humidification – heatingSensible heat transfer – Plate HEXpreheating – humidification – post heating1.701.721.740Air pressure: 1,013.3 hPa510152021%MontenegroWinter comfort range[DIN EN 13779:2004]25303540Absolute moisture content [g/kg]

VRF AHU Dx CoilsCOOLING: different concept – different energy consumptionCOOLING: different concept – different initial cost40%5%10 %15 %20%25%30%Temperature [ C]40%5%10 %15 %20%25%30%Temperature [ C]40%5%10 %15 %20%25%30%36032028030024026025303540Absolute moisture content [g/kg]20051%202201516010180531.501201.740Air pressure: 1,013.3 hPa241.481401.72MontenegroSummer comfort range[DIN EN 1.6801.68[kg/m³]1001.661% 0 % 0 % .34%9107is0tured .601.42[k J/kg]1.561.40En 6025303540Absolute moisture content Air pressure: 1,013.3 hPa1.481401.72MontenegroBehaglichkeitsfeld im SommerASHRAE 19973801.701.46001.684/m³]1001.661.44ir [kg401.642151% 0 % 0 % .3498010a20201.621.42heat recovery - coolingDe1n .36% sity0 o%f mois0tu%07 kg]21.5014031.481801.462201.4424013001.42101.30% 1086420-2-4-6-8-10-12-14-16-18-20mixing - cooling1.36Den% sity0 o%f mois0tu% 0 % 90 %7 red a8ir650[kg/m³]260Temperature [ C]cooling only1.381.701.721.740Air pressure: 1,013.3 hPa5101566%20MontenegroSummer comfort range[DIN EN 13779:2004]25303540Absolute moisture content [g/kg]

VRF AHU Dx Coils

VRF AHU Dx Coils

VRF AHU Dx CoilsLGE AE CONTROL SOLUTIONS :Room temperature (exhaust) controlledIt means higher capacity IDUControl:Temperature sensorDDCBMSAPPLIATION RANGE: depends onVRF (-25 C) DX COIL air in temperature min. 5 C!Supply air controlledtIN 5 C !Dx coillFresh air supply systemsControl:AI: 0-10VDDC/PLCBMSAPPLICATION RANGE: depend on VRF DX COIL air in temperature 5 CHeat Recovery

VRF AHU Dx CoilsLGE AE CONTROL SOLUTIONS :

COMMUNICATION KITControlled byRemote controller or Dry contact viaDDCCommunication KitSupport LG Centralized controllers(PRCKA1)Controlled byDDCLG Centralized controllers are notCommunication Kitapplicable(PRDCA0)Not applicableMultiple AHUs EEV kits with Indoor units1 AHU 1 EEV Kit without indoor units1REFRIGERANT CONTROLLERTXV : Thermal Expansion ValveEEV : Electronic Expansion ValveEEV Kit(PRLK048A0PRLL096A0)2 Models 10HP 20HPMultiple EEV kits in 1 MULTI V system(PRCKA1 only)123 80HP1TXV Kit(Expansion Kit)PATX13A0EPATX20A0EPATX25A0EPATX30A0EPATX35A0E5 Models 16HP 26HP 36HP 46HP 56HP1 TXV kit in 1 MULTI V system1

Multiple EEV Kits( 80HP) or Single TXV Kit( 56HP)Option 3Option 1RETRUN AIROption 2PRCKA1EEV or TXV Kit* Option 1 : LG Remote controller, Option 2 : LG Dry contact DDC(Field supply), Option 3 : LG Centralized controlSingle EEV( 20HP) or TXV Kit( 56HP)Multiple EEV Kits( 80HP) or Single TXV Kit( 56HP)SUPPLY AIR via DDCOption 1PRCKA1PRDCA0IO moduleOption 11EEV or TXVKitEEV or TXVKit** Option 1 : LG Remote controller(monitoring only)*** Option 1 : LG Remote controller, Option 2 : LG Centralized controlOption 2

Simple AHU control with return(room) air control (When applying PRCKA1 model)CONCEPT - Simple AHU control with return(room) air control (When applying PRCKA1model)ConceptMULTI V Series!! Centralized controlLG Centralized controllers (Optional item)CEN A-B? HOW DOES IT WORKBACnetModbusLonworksLANIDU A-BLG Wiredremote controllerRoom airTB 12-13-14Return airPipe inTB 4-5AHUPower Supply(220-230V)TB 1-2-3CoilPipe out* Fan output signal should be connected to relay coil.Direct connection from AHU comm. kit to fan will cause a critical product damage.Fan outputsignal*(220-230V)ControlpanelFieldsupply

RA PRCKA1 – How does it work? #11 AHU Comm. Kit senses return/room air(selectable) temperatureLG Wiredremote controllerRoom airReturn air

RA PRCKA1 -MULTI V SeriesHow does it work? #21 AHU Comm. Kit senses return/room air(selectable) temperature2 If return(room) air is higher than setting temperature, outdoor unit will start operation (based on cooling operation)IDU A-BLG Wiredremote controllerRoom airReturn airCoil

RA PRCKA1 -MULTI V SeriesHow does it work? #31 AHU Comm. Kit senses return/room air(selectable) temperature2 If return(room) air is higher than setting temperature, outdoor unit will start operation3 AHU Comm. Kit outputs fan signal(220-230V) according to return(room) air conditionIDU A-BLG Wiredremote controllerRoom airReturn airFan FFOFFCoil

Summary of return air control with PRCKA1LG Centralized controllersMULTI V SeriesCEN A-BLANIDU A-BLG Wiredremote controllerBACnetModbusLonworksAHU Communication KIT(Model : PRCKA1)TB 12-13-14AHU #1Main featuresPowerSupply220-230 VTB 4-5- For simple AHU control with return air controlTB 1-2-3: Refrigerant coil on/off, mode change, fan on/off, etcCoil- Support LG Centralized controllersFanSignalOutput- EEV Kit or TXV(Expansion) Kit can be applicableFunctionBy LG Remote controllerControlAHU Comm. Kit ON/OFFOOutdoor unit operation(Compressor operation)-ModeMonitorLG Wiredremote controllerLG Wired remotecontrollerOAHU #2OFan/Heating/Coolin (room) air temperatureCooling 18 30 Heating 16 30 OSupply air temperature control viaDDCWith IO Module(PVDSMN000)-Error status-OTB 1-2-3CoilFan StepPowerSupply220-230 VTB 4-5To Indoor units orother AHUsFanSignalOutput

Supply air control via DDC with PRDCA0ConceptCONCEPT - SA control via DDC with PRDCA0LG Wiredremote controller(for only monitoring)MULTI V SeriesAHU Controller(Filed supply)DI signalsDO signalsODU Centralized control0 10 V, AI signalsODU-AHU Communication KitSupply air temp.Sensor(Field supply)Fan Return airControlpanelFan power(Field installation)ONONOFFOFF

Summary of supply air control with PRDCA0MULTI V SeriesCEN A-BAHU Controller(Filed supply)IDU A-BAHU CommunicationKIT(Model : PRDCA0)AHUOn// OffOff controlcontrol&& orModeAITB#119-20-21Fan controlcontrol&& monitormonitorFanOutdoorunitunit controlcontrolviaviaDDC)DDC)(SupplyRoom temperaturetemperatureRoomLG Wiredremote controller(for only monitoring)Control specification for DDC wiringDI DI DIDO DO DOPowerSupply220-230 VTB#1 23-24TB#1 11-12FunctionTB#11-2-3CoilFanSignalOutputBy AHU Comm. Kit (PRDCA0)ControlMonitorAHU Comm. Kit ON/OFFDigital input(Non voltage)Digital output(Non voltage)Outdoor unit operation(Compressor operation)-Digital outputModeFan/Heating/CoolingDigital inputFan/Defrost/Heating/CoolingDigital outputFan StepHigh/Mid/LowDigital inputHigh/Mid/LowDigital outputReturn(room) air temperatureCooling 18 30 Heating 16 30 DC 0 10V InputWith remotecontroller(PQRCVSL0QW)Supply air temperature control viaDDC40 100%DC 0 10V Input-Error status-Digital output

VRF AHU Dx CoilsSummary of supply air control with PRDCA0: AI 0 -10VTarget pressures/temperatureHEX – Coils in AHUs