LG Electronics LA120HPI, LA120HPO, LA090HPO, LA120CPO, LA120CPI Connection of Piping -Outdoor

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Flaring work and connection of piping

ConnectionofPiping -Outdoor

Put a couple drops of refrigerant oil on the face of the flare before assembling taking care not to add any contaminants.

Align the center of the pipings and sufficiently tighten the flare nut by hand.

Finally, tighten the flare nut with torque wrench until the wrench clicks.

•When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench.

Outside diameter		Torque

mm	inch	kgf.cm
Ø6.35	1/4	180~250
Ø9.52	3/8	340~420
Ø12.7	1/2	550~660
Ø15.88	5/8	630~820
Ø19.05	3/4	980~1210

Outdoor unit

Liquid side piping (Smaller diameter)

Gas side piping (Bigger diameter)

Torque wrench

Service Manual 23

Image 23

Contents Room Air Conditioner Table of Contents Install the panel and the cover Safety PrecautionsInstallation Do not use damaged power cords, plugs, or a loose socketOperation Do not install the product on a defective installation standSounds, odors, or smoke comes When flammable gas leaks, turnDo not place a heater or other Do not use the product in a tightThat water is drained away prop Keep level even when installingIng foods, works of art, etc. It is a Product when removingDo not use the product for spe Cial purposes, such as preservIt is not sanitary and could cause DisuseOutlet while the air conditioner is Indoor Unit DimensionsSymbols Used in this Manual 9k, 12k Models Outdoor UnitModels Product SpecificationsInstallation Tools InstallationInstallation Parts Installation Map This Product Contains R-410A Refrigerant Confirm The RefrigerantOutdoor unit Rooftop InstallationsSelect the best Location Indoor unitPiping Length and Elevation Oil trap should be installed every 16.4~23feets 5~7 metersDrain hose junction Preparing Work for InstallationOpen panel front Cover pipe and cover side removeCase of nothing wrong, connect Pipe and the wire. Refer to installationFixing Indoor Unit Flaring Work Flaring work and connection of pipingFoamed polyethylene or equivalent is recommended Connecting the PipingCheck IndoorIndoor unit tubing Flare nut Pipings Wrap the insulation material around the connecting portionBad case For right piping. Follow the instruction below Good caseConnection of Piping -Outdoor Connecting the Cables How to connect wiring to the terminals Connection method of the connecting cableExampleConnecting the cable between indoor unit and outdoor unit Drain piping Checking the DrainageTo check the drainage Forming the Piping Air purging with vacuum pump Air PurgingAir purging Finishing the job Soap water methodEvacuation Charging Panel Front Assembly Evaluation of the performance Prepare remote controllerTest Running Settlement of outdoor unitPump Down Pump Down ProcedureHow to replace picture & photograph Functions OperationFunction of main control Time delay Safety ControlChaos Swing Mode Cooling Operation ModeAuto Operation for Cooling Auto Operation Electronic control modeAuto Operation for Heatingonly Heating Model Healthy DehumidificationAuto Operation for Dehumidificationonly Heating Model Hot-Start Control Heating Operation Modeonly Heating ModelHeating Mode with the Sleep Modeonly Heating Model Cooling or Heating Mode with Sleep Mode Auto ControlCooling Mode with the Sleep Mode Test operation Auto restartForced Operation Cooling Heat pump ModelOperation Indication Lamps Signal ReceptorDisplay Function Self-diagnosis FunctionNd F Button Remote Control OperationsControls To remove the Control Box DisassemblyTo remove the Grille from the Chassis To remove the Motor To remove the Evaporator. Remove hole tubing holdeBefore removing the Turbo Fan Heat Pump/Cooling Only SeriesIndoor Unit Schematic DiagramHeat Pump Series/ Cooling Only Series Outdoor Unit No A20999A PCB ASSEMBLY, Main Top View Bottom View Indoor Unit P.W.B. AssemblyNo A20901C PCB ASSEMBLY, Main Top View Bottom View Outdoor Unit P.W.B. AssemblyDisplay P.W.B. ASM No A20921A PCB AssemblyWiring Diagram Outdoor UnitCooling Only Models, & Heating Models Refrigeration Cycle Diagram Troubleshooting GuidePiping Length and Elevation Air purging of the charge hose ProcedureWay Valve Pumping DownRe-air purging Gas leakage Balance refrigerant of the 3-way valveAll amount of refrigerant leaked EvacuationPurge the air from the charge hose Gas ChargingAfter Evacuation Connect the charge hose to the charging cylinderAdditional gas charging Method of using graphMethod of using equation According to Indoor & Outdoor TemperatureTrouble analysis Cycle PartsProduct does not operate at all Electronic Parts 9k modelProduct is not operate with the remote controller Compressor/Outdoor Fan are unable to drive Nector When indoor Fan does not operateWhen Vertical Louver does not operate When a comunication error occurs Indoor Unit Phenomena in case of connecting errorOutdoor Unit RY-COMP-B Voltage of Connectors according to Indoor Fan SpeedIndoor Unit Exploded ViewOutdoor Unit Parts ListIndoor Replacement Parts ListParts ListOutdoor December No A20926C