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Safety Precautions ...................................................................................................................................................................................................... 4-7
Installation... .............................................................................................................................................................................................................. 4-5
Wiring ....................................................................................................................................................................................... 6
Operation ................................................................................................................................................................................. 7
Nomenclature ���������������������������������������������������������� 8
Water Source Unit Specifications ............................................................................................................................................................................ 9-16
General and Electrical Data .......................................................................................................................................................................................... 9
Dimensions ................................................................................................................................................................................................................. 10
Refrigerant Circuits ................................................................................................................................................................................................ 11-13
Wiring Diagram ........................................................................................................................................................................................................... 14
Accessories ........................................................................................................................................................................................................... 15-16
Installation ��������������������������������������������������������� 17-62
Placement Considerations .......................................................................................................................................................................................... 17
Transporting / Lifting the Water Source Unit ............................................................................................................................................................... 18
Minimum Space Requirements .................................................................................................................................................................................. 19
General Mounting / Anchoring the Water Source Unit ................................................................................................................................................ 20
Refrigerant Piping Installation ............................................................................................................................................................................... 21-40
Computer-assisted Refrigerant Pipe Design .............................................................................................................................................................. 21
System Engineering .............................................................................................................................................................................................. 22-30
Pipe Sizing ............................................................................................................................................................................................................. 31-34
Refrigerant Pipe Connections ................................................................................................................................................................................ 35-37
Insulating the Refrigerant Piping System .............................................................................................................................................................. 38-39
Pressure Testing ........................................................................................................................................................................................................ 40
Water Circuit Installation ...................................................................................................................................................................................... 41-117
Piping System Specifications ................................................................................................................................................................................ 43-46
Flow Switches and Solenoid Valves ...................................................................................................................................................................... 47-48
Variable Water Flow Control Kit ............................................................................................................................................................................. 49-56
Electrical System Installation ................................................................................................................................................................................. 57-62
General Information ....................................................................................................................................................................................................57
Power Wiring .............................................................................................................................................................................................................. 58
Wiring and Cable Terminations ................................................................................................................................................................................... 59
Communications Cables ........................................................................................................................................................................................ 60-62
Pre-commissioning and Maintenance ................................................................................................................................................................... 63-78
Preparing the Electrical System ................................................................................................................................................................................. 63
Indoor Unit Auto Addressing Auto Addressing ....................................................................................................................................................... 63-66
Group Control ............................................................................................................................................................................................................. 67
Central Control ...................................................................................................................................................................................................... 67-69
Indoor Unit Temperature Sensing Strategy / Air Balance ........................................................................................................................................... 70
Prepare the Refrigerant Piping System ...................................................................................................................................................................... 71
Preparing / Balancing the Water Circuit ...................................................................................................................................................................... 72
Prepare Pre-commissioning Package Documents ..................................................................................................................................................... 73
Initiate a Request ........................................................................................................................................................................................................ 73
Maintaining the Heat Exchanger ................................................................................................................................................................................ 74
General Maintenance Schedule ............................................................................................................................................................................ 75-76
Error Codes .............................................................................................................................................................................................................. 77-82
LG Monitoring View (LGMV) Diagnostic Software ................................................................................................................................................. 77-78
Error Code Tables .................................................................................................................................................................................................. 79-81
Checklists ................................................................................................................................................................................................................. 83-90
Configuration Worksheet ............................................................................................................................................................................................ 83
Installation Checklist .............................................................................................................................................................................................. 84-85
Pre-commissioning Checklist ................................................................................................................................................................................ 86-89
Refrigerant Charge Worksheet ................................................................................................................................................................................... 90
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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