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Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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TABLE OF CONTENTS
CONTENTS
Safety Instructions ..............................................................................................................4
Introduction ......................................................................................................................... 9
Unit Nomenclature ............................................................................................................11
General Data ....................................................................................................................12
Specications .............................................................................................................................13
Typical Multi F/Multi F Max Systems ..........................................................................................15
Refrigerant Piping Requirements ...............................................................................................17
General Installation Guidelines .........................................................................................18
Location Selection ......................................................................................................................18
Inspection ...................................................................................................................................19
Install Wall-Mounted IDU Chassis ..............................................................................................20
Refrigerant Piping .......................................................................................................................22
Piping Materials and Handling ....................................................................................................30
Piping Preparation ...................................................................................................................... 31
Piping Connections ...........................................................................................................32
IDU to ODU ................................................................................................................................32
Piping Insulation .........................................................................................................................35
Drain Piping ................................................................................................................................ 37
Electrical Wiring ................................................................................................................ 38
Power Wiring Specications and Best Practices ........................................................................ 39
Controller Options .......................................................................................................................40
Indoor Unit Electrical Connections Guidelines ...........................................................................41
Indoor Unit Electrical Connections Procedure ............................................................................42
Self Diagnosis Functions ........................................................................................................... 44
LG SIMS - Self Diagnosis Functions .........................................................................................46
Optional Wall-Mounted Sensor and Controller ...........................................................................48
Troubleshooting ................................................................................................................ 49
Error Codes ...............................................................................................................................49
Cautions for Refrigerant leaks ..........................................................................................50
Refrigerant Leaks .......................................................................................................................50
Installation Checklist ......................................................................................................... 51
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