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TABLE OF CONTENTS
About LG Electronics, Inc. ............................................................................................................................................................................................. 3
Duct-Free Split (DFS) Systems ...................................................................................................................................................................................... 3
Unit Nomenclature .......................................................................................................................................................................................................... 9
Four-Way Ceiling Cassette System Data................................................................................................................................................................. 7-35
Product Features and Benets ..................................................................................................................................................................................... 8
General Data ........................................................................................................................................................................................................... 9-12
Electrical Data ............................................................................................................................................................................................................ 13
Dimensions ............................................................................................................................................................................................................ 14-19
Acoustic Data ........................................................................................................................................................................................................ 20-21
Air Velocity and Temperature Distribution .............................................................................................................................................................. 22-24
Refrigerant Flow Diagrams .................................................................................................................................................................................... 25-28
Wiring Diagrams .................................................................................................................................................................................................... 29-33
Accessories ........................................................................................................................................................................................................... 34-35
Performance Data .................................................................................................................................................................................................... 36-46
Cooling Capacity Tables ........................................................................................................................................................................................ 37-42
Heating Capacity Tables ........................................................................................................................................................................................ 43-45
Application Guidelines ............................................................................................................................................................................................ 47-62
Equipment Selection Procedure ............................................................................................................................................................................ 48-49
Building Ventilation Design Guide ......................................................................................................................................................................... 50-54
Placement Considerations ..................................................................................................................................................................................... 55-62
Refrigerant Piping Design & Layout Best Practices ............................................................................................................................................ 63-72
Design Guideline Summary ........................................................................................................................................................................................ 64
Selecting Field-Supplied Copper Tubing ............................................................................................................................................................... 65-66
Refrigerant Piping System Layout ......................................................................................................................................................................... 66-70
Piping Insulation ......................................................................................................................................................................................................... 71
Condensate Drain Piping ............................................................................................................................................................................................ 72
Electrical and Mechanical Specications ............................................................................................................................................................. 73-78
Electrical Connections ........................................................................................................................................................................................... 73-75
Mechanical Specications ..................................................................................................................................................................................... 77-78
Acronyms ...................................................................................................................................................................................................................... 79
TABLE OF SYMBOLS
DANGER
This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING
This symbol indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION
This symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury.
Note:
This symbol indicates situations that may result in equipment or property damage accidents only.
This symbol indicates an action that should not be performed.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
4 | INTRODUCTION
Four-Way Ceiling Cassette System Engineering Manual
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