Table of Contents
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General Data .............................................................................................................................................. 8
Unit Nomenclature ................................................................................................................................... 8
Specifications .......................................................................................................................................... 9
Electrical ................................................................................................................................................ 11
Location Selection ................................................................................................................................. 12
General Installation Guidelines .............................................................................................................. 14
Oceanside Applications ......................................................................................................................... 14
Required Outdoor Unit Clearances .......................................................................................................15
Required Indoor Unit Clearances ..........................................................................................................20
Horizontal Right Installation ................................................................................................................... 22
Vertical Downflow Installation ................................................................................................................23
Installing Ductwork ................................................................................................................................ 26
Refrigerant Safety/Device Connection Limitations ................................................................................27
Selecting Field Supplied Piping ............................................................................................................. 28
Copper Expansion and Contraction .......................................................................................................29
Piping Handling ..................................................................................................................................... 31
Refrigerant System Engineering ............................................................................................................ 32
Flaring and Brazing Procedures ............................................................................................................ 35
Refrigerant Piping Connections ............................................................................................................. 37
Installation Overview ............................................................................................................................. 37
Directional Pipe Formation .................................................................................................................... 38
Outdoor Unit Connections ..................................................................................................................... 39
Indoor Unit Connections ........................................................................................................................ 40
Drain Hose ............................................................................................................................................. 41
Bundling and Cutting Line ..................................................................................................................... 42
Electrical System Installation ................................................................................................................. 45
General Information and Safety Guidelines ...........................................................................................45
Power Wiring Specifications and Best Practices ...................................................................................46
Wall Controller Installation ..................................................................................................................... 49
External Static Pressure Setting Values ................................................................................................50
Indoor Unit Electrical Connections ........................................................................................................ 51
Outdoor Unit Electrical Connections ...................................................................................................... 52
Indoor Unit Wiring Diagram ................................................................................................................... 53
Outdoor Unit Wiring Diagram LUU188HV, LUU248HV .........................................................................54
NK/NJ Chassis Wiring Diagram Legend ................................................................................................56
NJ/NK Chassis DIP Switch Settings ...................................................................................................... 57
Final Installation Procedures ................................................................................................................. 58
Triple Leak / Pressure Check ................................................................................................................ 58
Triple Leak / Pressure and Evacuation Procedures ..............................................................................59
Triple Evacuation Procedure ................................................................................................................. 60
Trim Charge, Test Run ...........................................................................................................................61
Pump Down, Cooling Only Mode ..........................................................................................................62
LG SIMS - Self Diagnosis Functions .................................................................................................... 63
Error Codes .......................................................................................................................................... 65
Refrigerant Leaks .................................................................................................................................. 67
Installation Checklist ............................................................................................................................... 68
Due to our policy of continuous product innovation, some specifications may change without notification.
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