LG ARNU423NKA4.AMBBLUS User Manual

Vertical Air Handling UnitPlease read this installation manual completely before installing the product.Installation work must be performed in accorda

10 Vertical Air Handling Unit• Position unit for plenum installation.• The plenum should be secured in order to support the installation of adapter ca

Installation Manual 11ENGLISHInstallationDuct work• Over 10 screws should be used for joining supply duct with the unit.• To prevent vibration transm

12 Vertical Air Handling Unit• It is particular that the units should not be installed in such a manner that the access panels facing upor down• It sh

Installation Manual 13ENGLISHInstallationPreparation of PipingCut the pipes1. Use the pipes purchased locally.2. Measure the distance between the ind

14 Vertical Air Handling UnitNote: Overlap the connection pipe insulation material and the indoor unit pipe insulation material. Bindthem together wit

Installation Manual 15ENGLISHInstallation3214561 Refrigerant piping 4 Taping2 Pipe to be brazed 5 Valve3 Nitrogen 6 Pressure-reducing valveAlways blo

16 Vertical Air Handling UnitInstallationNitrogen substitution methodWelding, as when heating without nitrogen substitution a large amount of the oxid

Installation Manual 17ENGLISHInstallationRecommendInsulationInsulate the joint and tubes completely.Thermal insullaton : All thermal insulation must

18 Vertical Air Handling UnitInstallation• The drainage performance has to be optimized by installing both primary and secondary drain linesalong with

Installation Manual 19ENGLISHInstallationMore than 2 inch(51mm)Drainage holeU-TrapBCA ≥ 2-9/16 inch (70mm) B ≥ 2CC ≥ 2 x SPSP = External Pressur

2 Vertical Air Handling UnitIMPORTANT!CAUTION: Improper installation, adjustment, alteration, service or maintenance can void the warranty.The weight

20 Vertical Air Handling UnitInstallationConnect the wires to the terminals on the control board individually according to the outdoor unitconnection.

Installation Manual 21ENGLISHInstallationAfter the confirmation of the above conditions, prepare the wiring as follows:1) Never fail to have individu

22 Vertical Air Handling UnitInstallationCAUTION :The connecting cable connected to the indoor and outdoor unit should be complied with the fol-lowing

Installation Manual 23InstallationENGLISHElectric HeaterTerminal BlockHeater CableRelayHeater CoilBracketBi metal※ If you want to know more optional

24 Vertical Air Handling UnitInstallationDip Switch SettingFor Multi V Models, DIP switch 1, 2, 6, 8 must be set OFF.CAUTIONFunction Description Setti

Installation Manual 25ENGLISHInstallationGroup Control SettingMasterGNDSignal12 VLGAP Network SystemMaster Slave Slave SlaveDisplay Error MessageOnly

26 Vertical Air Handling UnitInstallationGNDSignal12 VLGAP Network SystemMaster Master Slave SlaveDonʼt connect serial 12V lineorDisplay Error Message

Installation Manual 27ENGLISHInstallationGNDSignal12 VLGAP Network SystemMNMasterSlaveDisplay Error MessageMasterFAUSlaveFAUMasterorMaster MasterDisp

28 Vertical Air Handling UnitInstallationLGAP Network SystemMasterSlaveGNDSignal12 VorDisplay Error MessageMasterSlaveSlaveSlave4. 2 Remote Controln W

Installation Manual 29ENGLISHInstallationThe A-weighted sound pressure emitted by this product is below 70 dB.** The noise level can vary depending o

Installation Manual 3ENGLISHVertical Air Handling Unit Installation ManualTABLE OF CONTENTSo Four type "A" screwso Pipes: Gas sideLiquid si

30 Vertical Air Handling UnitProduct DataExternal Static Pressure & Air FlowProduct DataAir handler units are UL Listed up to 0.5 in.wc external s

Installation Manual 31ENGLISHHeater Capacity(kW) Static pressure drop (in.wc)0 05 – 0.0110 – 0.0215 – 0.0420 – 0.06Electric Heater Static pressure dr

32 Vertical Air Handling UnitProduct DataAir Filter (Field supply) Static pressure drop factorsIf the air filter has been installed, then the ESP val

US1. Please call the installing contractor of your product, as warranty service will be provided by them.2. If you have service issues that have not b

Wiring knockouts for conduit Wiring knockouts for conduit Refrigerant connectionsDrain connections for horizontal applicationFilter accessDrain connec

ENGLISHFeatureInstallation Manual 5Duct Connection Dimensions<Top> <Front> <Bottom> <Side-right> Refrigerant connections Drai

Safety Precautions6 Vertical Air Handling UnitSafety PrecautionsTo prevent injury to the user or other people and property damage, the following instr

Safety PrecautionsENGLISHInstallation Manual 7Do not allow water to run intoelectric parts.• It may cause There is risk of fire,failure of the produ

8 Vertical Air Handling UnitSafety PrecautionsCAUTIONn InstallationAlways check for gas (refrigerant) leakageafter installation or repair of product.•

Installation Manual 9ENGLISHInstallation• Where optimum air distribution can be ensured.• Where nothing blocks air passage and install the duct work.