INSTALLATION MANUAL AIR CONDITIONER

INSTALLATION MANUALAIR CONDITIONER Please read this installation manual completely before installing the product. Installation work must be performed in accordance with the national wiringstandards by authorized personnel only. Please retain this installation manual for future reference after reading itthoroughly.TYPE : AHU EEV KitModel : PRLK096A0www.lg.comP/NO : MFL50024803

AHU EEV Kit Installation ManualTABLE OF CONTENTSn Safety Precautions.3n Installation Scene.4n Supplies.5n Part Description.6n EEV Kit(PRLK096A0).6n EEV Kit Installation .7n Mechanical installation.7-8n Brazing work .9-10n Electrical work .11n Thermistors Installation.12n Pipe thermistors installation.12-14n Troubleshooting .152 AHU EEV Kit

Safety PrecautionsSafety PrecautionsTo prevent injury to the user or other people and property damage, the following instructions must be followed.n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness isclassified by the following indications.WARNINGThis symbol indicates the possibility of death or serious injury.CAUTIONThis symbol indicates the possibility of injury or damage.n Meanings of symbols used in this manual are as shown below.Be sure not to do.Be sure to follow the instruction.WARNINGn InstallationDon't touch with thehands while the power isonUse standardparts(connector).For electrical work, contactthe dealer, seller, a qualifiedelectrician, or an AuthorizedService Center. There is risk of fire or electricshock. Do not disassemble or repairthe product. There is risk of fireor electric shock. Do not disassemble or repairthe product. There is risk of fireor electric shock.Use the correctly ratedbreaker or fuse.Do not install, remove, or reinstall the unit by yourself(customer).For installation, alwayscontact the dealer or anAuthorized Service Center. There is risk of fire or electricshock. There is risk of fire, electricshock, explosion, or injury. There is risk of fire, electricshock, explosion, or injury.n OperationWhen the product is soaked (flooded orsubmerged), contact an Authorized ServiceCenter.Be cautious that water could not enter theproduct. There is risk of fire or electric shock. There is risk of fire, electric shock, or productdamage.Installation Manual 3

Installation SceneInstallation SceneSignalPipeThermistorAir flowRefrigerant flow(Cooling)Refrigerant flow(Heating)91037684215Parts and componentsNo.NameRemarks1Air Handling UnitField supply2Outdoor UnitMulti V3AHU Control Kit(PRCKA0)-4AHU EEV Kit(PRLK096A0)-5Field pipingField supply6Control kit wiring(Power supply and communication between control kit and outdoor unit)7Pipe thermistors (EBG61287703 / BG61287704)Evaporator (In/Out) control of Air Handling Unit8Room thermistor (EBG36949303)Return air control9Remote controller(PQRCUSA0)Optional accessory10Dry contact PCB(PQDSBNGCM0)Optional accessoryWiring connections4 AHU EEV Kit

SuppliesSuppliesPRLK096A0ComponentsAHU EEV KitInstallation A)11Weight(kg)Dimension(mm)Model lation Manual 5

Part DescriptionPart DescriptionEEV Kit(PRLK096A0)134425678No.Part NameQuantity(EA)1Panel upper12Bracket23Terminal box14Cable gland25Insulator tube16EEV assembly (EEV, Strainer, Tube)17Support tie wrap18Panel base16 AHU EEV Kit

EEV Kit InstallationEEV Kit InstallationMechanical installation1. Remove the EEV Kit box cover by unscrewing the screw(4EA).2. Drill 4 holes on correct position and fix the EEV Kit box securely with 4 screws(Field supply)through the provided holes Ø6 mm(Reference the length of the holes Ø6)338 mm190 mmProvided holesØ6 mm (4EA)Pipe sizeØ12.7 mm(1/2")Installation Manual 7

EEV Kit InstallationMechanical installation3. Prepare the inlet/outlet field piping just in front of the connection(do not braze yet).4. Remove the pipe fixing bracket(C) by unscrewing 4 x M4.5. Remove the Pipe insulation.6. Braze the field piping.A. Inlet coming from the outdoor unitB. Outlet to evaporatorEC. Pipe fixing bracket(2EA)D. Pipe insulationDE. EEV AssemblyF. Field pipe(Inlet / Outlet)C(2EA)BAFFCAUTIONn Make sure to cool the filters and EEV body with a wet cloth and make sure the bodytemperature does not exceed 120 C during brazing.n Make sure that the other parts such as electrical box, tie wraps and wires protected fromdirect brazing flames during brazing.8 AHU EEV Kit

EEV Kit InstallationBrazing work7. After brazing, put the Pipe insulation(D) on the EEV Assembly(E) and fold the Pipeinsulation(D) mentioned below (after pealing off the liner).8. Secure the pipe fixing bracket(C:2EA) in place again (4 x M4)FoldLiner9. Make sure that field pipes are fully insulated.Field pipe insulation must reach up to the insulation you have put back in place as perprocedure step 7. Make sure that there is no gap between both ends in order to avoidcondensation dripping (finish the connection with tape eventually).Installation Manual 9

EEV Kit InstallationBrazing workCAUTIONn Be sure to carry out a nitrogen blow when brazing.Brazing without carrying out nitrogen replacement or releasing nitrogen into the piping willcreate large quantities of oxidized film on the inside of the pipes, adversely affectingvalves and compressors in the refrigerating system and preventing normal operation.n When brazing while inserting nitrogen into the piping, nitrogen must be set to 0.02 MPawith a pressure-reducing valve(just enough so that it can be felt on the skin).abecdbrazingffa Refrigerant pipingc Tapinge Pressure-reducing valveb Part to be brazedd Hands valvef Nitrogenn The leakage test is executed by pressurizing nitrogen gas up to 3.8MPa(38.7kgf/cm2)(The test must be done with the service valve of the outdoor unit closed and the gas mustbe pressurized at the liquid pipe, gas pipe and high/low pressure common pipe of theoutdoor unit), and the pressure of the nitrogen gas must not drop for 24 hours.n For more details, refer to the manual of the outdoor unit.10 AHU EEV Kit

EEV Kit InstallationElectrical work10. Open the terminal box cover(A).11. Pass EEV cable(Field supply, 6 wires) from the AHU Control Kit through cable gland and connectthe cable wires into the terminal connector(C) following instructions as describe in step 12. Routethe cable out of the EEV Kit box according to figure below and fix with the support tie wrap(D).DetailACBDEEVBRRDBLORYLWHEEA. Terminal box coverB. Cable glandC. Terminal connectorD. Support tie wrapE. Electric wiring work(Field supply, 6 wires)12. Use a screwdriver( ) and follow indicated instructions for connecting cable wires into theterminal connector according to the circuit diagram.DetailField connect wiresNOTEEEVBRRDBLORYLWHEEVConnectLabelBRField workRDBLORYLWH1. BR : BROWN2. RD : RED3. BL : BLUE4. OR : ORANGE5. YL : YELLOW6. WH : WHITECAUTIONn Before connecting the wires(Field supply), make sure to compare with the Connectlabel between EEV Kit and Control Kit.n Make sure to connect the wires according to the circuit diagram in Control Kit.13. Make sure that field wiring and insulation is not squeezed when closing the EEV Kit box cover.14. Close the EEV Kit box cover(4 x M4).Installation Manual 11

Thermistors InstallationThermistors InstallationPipe thermistors InstallationLocation of the pipe thermistorsA correct installation of the thermistors is required to ensure a good operation :1. Pipe In (EBG61287703): Install the thermistor behind the distributor on the coldest pass the heat exchanger(contact your heat exchanger dealer).2. Pipe Out (EBG61287704): Install the thermistor at the outlet of the heat exchanger as close as possible to theheat exchanger.Evaluation must be done to check if the evaporator is protected against freeze-up.Execute test operation and check for freeze-up.1 Pipe In(Suction pipe)2 Pipe Out(Discharge pipe)12(Air Handling Unit)12 AHU EEV Kit

Thermistors InstallationPipe thermistors InstallationInstallation of the pipe thermistor cable1. Put the thermistor cable in a separate protective tube.2. Always add a pull-relief to the thermistor cable to avoid atrain on the thermistor cable andloosening of the thermistor. Strain on the thermistor cable or loosening of the thermistormay result in bad contact and incorrect temperature measurement.1245 Fixation of the pipe thermistors (Field work)1. Fix the thermistor with insulating aluminum tape (Field supply) in order to ensure a goodheat transference.2. Put the supplied piece of rubber around the thermistor (EBG61287703/04) in order toavoid loosening of the thermistor after some years.3. Fasten the thermistor with 2 tie wraps.4. Insulate the thermistor with the supplied insulation sheet.1234Installation Manual 13

Thermistors InstallationPipe thermistors InstallationFixation of the pipe thermistors (Field work)1. Fix the thermistor with insulating aluminum tape (Field supply) in order to ensure a goodheat transference.2. Put the supplied piece of rubber around the thermistor (EBG61287703/04) in order toavoid loosening of the thermistor after some years.3. Fasten the thermistor with 2 tie wraps.4. Insulate the thermistor with the supplied insulation sheet.INSTRUCTIONn Put the thermistor wire slightly top to avoid water accumulation on down of the thermistor.n Make good between thermistor and evaporator. Put the top of the thermistors on theevaporator, this is the most sensitive point of the thermistor.212114 AHU EEV Kit45 Most sensitive point of the thermistorMaximize the contact

TroubleshootingTroubleshootingProblemAHU EEV Kitdoes not workCauseRemedyWiring is wrongCheck the electrical connection of the EEV KitPiping is wrongCheck the piping connection between the EEV Kitand outdoor unitInstallation Manual 15

16 AHU EEV Kit

brazing e f EEV Kit Installation n Be sure to carry out a nitrogen blow when brazing. Brazing without carrying out nitrogen replacement or releasing nitrogen into the piping will create large quantities of oxid