LG MULTI V ARNU543B8A4 - Page 3

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Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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TABLE OF CONTENTS
Safety Instructions ......................................................................... 4
Introduction ....................................................................................9
Unit Nomenclature ....................................................................... 11
R410A Refrigerant ....................................................................... 12
General Data ...............................................................................13
Specications − High-Static M2 Chassis ...........................................13
Specications − High-Static M2 and M3 Chassis ...............................14
Specications − High-Static B8 Chassis.............................................15
Specications − Convertible Mid-Static MA Chassis ..........................16
Specications − Mid-Static M2 Chassis..............................................17
Specications − Mid-Static M3 Chassis..............................................18
Specications − Low-Static Ducted L1/L2/L3 Chassis .......................19
Specications − Vertical Air Handling Unit NJ Chassis .......................20
Specications − Vertical Air Handling Unit NK Chassis ......................21
Electrical − Mid and High-Static M2/M3/B8 Chassis ..........................22
Electrical − Low-Static Ducted L1/L2/L3 Chassis ...............................23
Electrical − Vertical Air Handling Unit NJ/NK Chassis ........................24
Dimensions – High-Static Ducted B8 Chassis ....................................25
Dimensions – Mid and High-Static Ducted M2 Chassis .....................26
Dimensions – Mid and High-Static Ducted M3 Chassis .....................27
Dimensions – Mid-Static Ducted MA Chassis ....................................28
Dimensions – Low-Static Ducted L1/L2/L3 Chassis ...........................29
Dimensions – Vertical Air Handling Unit NJ Chassis ..........................30
Dimensions – Vertical Air Handling Unit NK Chassis..........................31
Refrigerant Piping Diagrams ..............................................................32
Installation Guidelines .................................................................33
General Installation Guidelines ...........................................................33
Install Ducted IDU Chassis .................................................................34
Indoor Unit Dimensions ......................................................................35
Duct Connection Dimensions .............................................................36
Maintenance Clearances ....................................................................37
Vertical Install for Convertible Mid Static (MA Only) ...........................38
General Mounting - V-H Air Handler Units ..........................................42
Piping Connections .............................................................................44
Refrigerant Piping ........................................................................45
Condensate Piping ......................................................................49
Wiring ..........................................................................................52
General Information / Separating Wiring and Cables .........................52
Power Wiring / Communication Cable Connections ...........................53
Power Supply / Power Wiring Specications ......................................54
Communications Cable Specications ...............................................55
Indoor Unit Communications Cable Connections ...............................58
Connection Procedure ........................................................................61
LGRED°, HRU Comp, and Gen 4 DIP Switch Settings ......................63
Controller and Opt. Wall-Mounted Sensor Install ...............................64
High-Static Ducted B8 Chassis ..........................................................65
Mid-Static and High-Static Ducted M2 Chassis ..................................67
Mid-Static and High-Static Ducted M3 Chassis ..................................69
Convertible Mid-Static Ducted MA Chassis ........................................71
Low-Static Ducted L1 Chassis ............................................................73
Low-Static Ducted L2/L3 Chassis .......................................................75
Vertical Air Handling Unit NJ Chassis .................................................77
Vertical Air Handling Unit NK Chassis ................................................79
Controls Setup .............................................................................81
Installation Checklist ....................................................................86
Limited Warranty ......................................................................... 88