LG LHN367HV, LUU367HV, LHN247HV, LUU247HV User Manual

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Page 1

DUCTED INDOOR UNITS

INSTALLATION MANUAL

ARNU073BGA4

ARNU093BGA4

ARNU123BGA4

ARNU153BGA4

ARNU183BGA4

ARNU243BGA4

ARNU283BGA4

ARNU363BGA4

ARNU423BGA4

High-Static Ducted Indoor Units

ARNU283BRA4

ARNU363BRA4

ARNU423BRA4

ARNU483BRA4

ARNU543BRA4

ARNU363B8A4

ARNU423B8A4

ARNU483B8A4

ARNU763B8A4

ARNU963B8A4

Low-Static Ducted Indoor Units

ARNU073BHA4

ARNU093BHA4

ARNU123BHA4

ARNU153BHA4

ARNU183BHA4

ARNU243BHA4

Built-In Ducted Indoor Units

ARNU073B3G4

ARNU093B3G4

ARNU123B3G4

Vertical Air Handler

Indoor Units

ARNU123NJA4

ARNU183NJA4

ARNU243NJA4

ARNU153B3G4

ARNU183B4G4

ARNU243B4G4

ARNU073L1G4

ARNU093L1G4

ARNU123L2G4

ARNU153L2G4

ARNU183L2G4

ARNU243L3G4

ARNU303NJA4

ARNU363NJA4

ARNU423NKA4

ARNU483NKA4

ARNU543NKA4

Page 2

PROPRIETARY DATA NOTICE

This document, as well as all reports, illustrations, data, information, and other

materials are the property of LG Electronics U.S.A., Inc., and are

disclosed by LG Electronics U.S.A., Inc., only in confidence.

Do not throw away, destroy, or lose this manual.

Please read carefully and store in a safe place for future reference.

Content familiarity required for proper installation.

The instructions included in this manual must be followed to prevent prod-

uct malfunction, property damage, injury, or death to the user or other

people. Incorrect operation due to ignoring any instructions will cause

harm or damage. A summary of safety precautions begins on page 4.

For more technical materials such as submittals, engineering

databooks, and catalogs, visit www.lghvac.com.

IM_MultiV_Ducted_IDU_5_16

For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice.

©LG Electronics U.S.A., Inc.

This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.

Page 3

TABLE OF CONTENTS

Safety Instructions .........................................................................4

Introduction ....................................................................................9

Unit Nomenclature ....................................................................... 11

R410A Refrigerant .......................................................................12

General Data ...............................................................................13

Specications − High-Static BH Chassis ........................................... 13

Specications − High-Static BG Chassis ........................................... 14

Specications − High-Static BG Chassis ........................................... 15

Specications − High-Static BR/B8 Chassis...................................... 16

Specications − Low-Static B3/B4 Chassis ....................................... 18

Specications − Low-Static Ducted L1/L2/L3 Chassis ...................... 19

Specications − Vertical Air Handler NJ Chassis ............................... 20

Specications − Vertical Air Handler NK Chassis .............................. 21

Electrical − High-Static BH/BG/BR/B8 Chassis ................................. 22

Electrical − Low-Static Built-In B3/B4 Chassis .................................. 23

Electrical − Low-Static Ducted L1/L2/L3 Chassis .............................. 24

Dimensions – High-Static Ducted BH Chassis .................................. 25

Dimensions – High-Static Ducted BG Chassis .................................. 26

Dimensions – High-Static Ducted BR Chassis .................................. 27

Dimensions – High-Static Ducted B8 Chassis ................................... 28

Dimensions – Built-In Low-Static Ducted B3/B4 Chassis .................. 29

Dimensions – Low-Static Ducted L1/L2/L3 Chassis .......................... 30

Dimensions – Vertical Air Handler NJ Chassis .................................. 31

Dimensions – Vertical Air Handler NK Chassis.................................. 32

Refrigerant Piping Diagrams ............................................................. 33

Power and Control Wiring ............................................................46

Overview ............................................................................................ 46

Indoor Unit Communication Cable Connections ................................ 47

Indoor Unit Power Cable Connections .............................................. 50

DIP Switch Settings for Gen4 Equipment .......................................... 52

High-Static Ducted BH Chassis ......................................................... 53

High-Static Ducted BG Chassis ......................................................... 55

High-Static Ducted BR Chassis ......................................................... 57

High-Static Ducted B8 Chassis ......................................................... 59

Low-Static Ducted L1 Chassis ........................................................... 61

Low-Static Ducted L2/L3 Chassis ...................................................... 63

Low-Static Built-In B3/B4 Chassis ..................................................... 65

Vertical Air Handler NJ Chassis ......................................................... 67

Vertical Air Handler NK Chassis ........................................................ 69

Optional Wall-Mounted Sensor and Controller .................................. 71

Controls Setup .............................................................................72

Installation Checklist .................................................................... 76

Installation Manual

General Installation Guidelines ....................................................34

Installation ...................................................................................35

Install Ducted IDU Chassis ................................................................ 35

Indoor Unit Dimensions ..................................................................... 36

Duct Connection Dimensions ............................................................ 37

Maintenance Clearances ................................................................... 38

Piping Connections ............................................................................ 39

Refrigerant Piping ........................................................................40

Condensate Piping ......................................................................44

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 4

SAFETY INSTRUCTIONS

WARNING

DANGER

WARNING

CAUTION

DANGER

The instructions below must be followed to prevent product malfunction, property damage, injury or death to the user or other people. Incorrect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the symbols below.

TABLE OF SYMBOLS

This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

This symbol indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

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.

INSTALLATION

Don’t use or store ammable gas or combustibles near the unit.

There is risk of re, explosion, and physical injury or death.

Do not install, remove, or re-install the unit by yourself (end-user). Ask the dealer or an an LG trained service provider to install the unit.

Improper installation by the user may result in water leakage, re, explosion, electric shock, physical injury or death.

Multi V Ducted Indoor Units

For replacement of an installed unit, always contact an LG trained service provider.

There is risk of re, electric shock, explosion, and physical injury or death.

The outdoor unit is shipped with refrigerant and the service valves closed. Do not open service valves on the unit until all non-condensibles have been removed from the piping system and authorization has been obtained from the commissioning agent.

There is a risk of physical injury or death.

Do not run the compressor with the service valves closed.

There is risk of explosion, physical injury, or death.

Periodically check that the outdoor unit is not damaged.

There is risk of explosion, physical injury, or death.

Replace all control box and panel covers.

If cover panels are not installed securely, dust, water and animals may

enter the unit, causing re, electric shock, and physical injury or death.

Always check for system refrigerant leaks after the unit has been installed or serviced.

Exposure to high concentration levels of refrigerant gas may lead to

illness or death.

Due to our policy of continuous product innovation, some specifications may change without notification.

Do not install the unit using defective hanging, attaching,

or mounting hardware.

There is risk of physical injury or death.

Wear protective gloves when handling equipment.

Sharp edges may cause personal injury.

Dispose of the packing materials safely.

• Packing materials, such as nails and other metal or wooden parts may cause puncture wounds or other injuries.

• Tear apart and throw away plastic packaging bags so that children may not play with them and risk suffocation and death.

Do not install the unit in any location exposed to open

ame or extreme heat. Do not touch the unit with wet hands.

There is risk of re, electric shock, explosion, and physical injury or death.

Install the unit considering the potential for earthquakes.

Improper installation may cause the unit to fall, resulting in physical injury or death.

Do not change the settings of the protection devices.

If the pressure switch, thermal switch, or other protection device is shorted and forced to operate improperly, or parts other than those

specied by LG are used, there is risk of re, electric shock, explosion, and physical injury or death.

If the air conditioner is installed in a small space, take measures to prevent the refrigerant concentration from exceeding safety limits in the event of a refrigerant leak.

Consult the latest edition of ASHRAE (American Society of Heating, Refrigerating, and Air Conditioning Engineers) Standard 15. If the refrigerant leaks and safety limits are exceeded, it could result in personal

Page 5

SAFETY INSTRUCTIONS

CAUTION

INSTALLATION – CONTINUED

injuries or death from oxygen depletion.

Be very careful when transporting the product.

• Do not attempt to carry the product without assistance.

• Some products use polypropylene bands for packaging. Do not use polypropylene bands to lift the unit.

• Suspend the unit from the base at specified positions.

• Support the unit at a minimum of four points to avoid slippage from rigging apparatus.

• Failure to follow these directions may result in minor or moderate physical injury.

Note:

Properly insulate all cold surfaces to prevent “sweating.”

Cold surfaces such as uninsulated pipe can generate condensate that may drip and cause a slippery oor condition and/or water damage to

walls.

When installing the unit in a hospital, mechanical room, or

similar electromagnetic eld (EMF) sensitive environment, provide sufcient protection against electrical noise.

Inverter equipment, power generators, high-frequency medical equipment, or radio communication equipment may cause the air conditioner to operate improperly. The unit may also affect such equipment by creating electrical noise that disturbs medical treatment or image broadcasting.

Do not use the product for special purposes such as preserving foods, works of art, wine coolers, or other precision air conditioning applications. This equipment is designed to provide comfort cooling and heating.

There is risk of property damage.

Do not make refrigerant substitutions. Use R410A only.

If a different refrigerant is used, or air mixes with original refrigerant, the unit will malfunction and become damaged.

Do not install the unit in a noise sensitive area.

When connecting refrigerant tubing, remember to allow for pipe expansion.

Improper piping may cause refrigerant leaks and system malfunction.

Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy R410A refrigerant according to applicable U.S. Environmental Protection Agency (EPA) rules.

Periodically check that the outdoor unit is not damaged.

There is a risk of equipment damage.

Install the unit in a safe location where no one can step on or fall onto it. attaching, or mounting hardware.

Do not install the unit with defective hanging,

There is risk of unit and property damage.

Install the drain hose to ensure adequate drainage.

There is a risk of water leakage and property damage.

Don’t store or use ammable gas/combustibles near the

unit.

There is risk of product failure.

Always check for system refrigerant leaks after the unit has been installed or serviced.

Low refrigerant levels may cause product failure

The unit is shipped with refrigerant and the service valves closed. non-condensibles have been removed from the piping system and authorization to do so has been obtained from the com-missioning agent.

Do not open service valves on the unit until all

There is a risk of refrigerant contamination, refrigerant loss and equipment damage.

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 6

SAFETY INSTRUCTIONS

DANGER

WARNING

WIRING

High voltage electricity is required to operate this system. Adhere to the National Electrical Codes and these instructions when wiring.

Improper connections and inadequate grounding can cause accidental injury or death.

Always ground the unit following local, state, and National Electrical Codes.

The information contained in this manual is intended for use

by an industry-qualied, experienced, trained electrician

familiar with the U.S. National Electric Code (NEC) who is equipped with the proper tools and test instruments.

Failure to carefully read and follow all instructions in this manual can

result in equipment malfunction, property damage, personal injury or

death.

Ensure the unit is connected to a dedicated power source that provides adequate power.

If the power source capacity is inadequate or the electric work is not performed properly, it may result in re, electric shock, physical injury or death.

Note:

Do not cut, lengthen or shorten the communications and power cable between any dry contact unit and its connected

Multi V Ducted Indoor Units

indoor unit. Do not install the unit in a location where the communications and power cable cannot be safely and easily connected between the two units. Do not allow strain on this cable.

Poor cable connections can cause equipment malfunction.

Turn the power off at the nearest disconnect before servicing the equipment.

Electric shock can cause physical injury or death.

Properly size all circuit breakers or fuses.

There is risk of re, electric shock, explosion, physical injury or death.

Refer to local, state, and federal codes, and use power wires

of sufcient current capacity and rating.

Wires that are too small may generate heat and cause a re.

Secure all eld wiring connections with appropriate wire

strain relief.

Improperly securing wires will create undue stress on equipment power lugs. Inadequate connections may generate heat, cause a re and physical injury or death.

Properly tighten all power connections.

Loose wiring may overheat at connection points, causing a re, physical injury or death.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 7

OPERATION

DANGER

WARNING

CAUTION

Do not provide power to or operate the unit if it is ooded

or submerged.

There is risk of re, electric shock, physical injury or death.

Use a dedicated power source for this product.

There is risk of re, electric shock, physical injury or death.

Do not operate the disconnect switch with wet hands.

There is risk of re, electric shock, physical injury or death.

Do not allow water, dirt, or animals to enter the unit.

There is risk of unit failure, re, electric shock, physical injury or death.

Avoid excessive cooling and periodically perform ventilation to the unit.

Inadequate ventilation is a health hazard.

Do not touch refrigerant piping during or after operation.

It can cause burns or frostbite.

Do not operate the unit with the panel(s) or protective cover(s) removed; keep ngers and clothing away from moving parts.

The rotating, hot, cold, and high-voltage parts of the unit can cause physical injury or death.

Periodically check power cable and connection for damage.

Cable must be replaced by the manufacturer, its service agent, or similar qualied persons in order to avoid physical injury and/or electric shock.

Securely attach the electrical cover to the unit.

Non-secured electrical covers can result in burns or electric shock due to

dust or water in the service panel.

Periodically verify the hanging bolts and other hardware securing the unit have not deteriorated.

If the unit falls from its installed location, it can cause property damage, product failure, physical injury or death.

If refrigerant gas leaks out, ventilate the area before operating the unit.

If the unit is mounted in an enclosed, low-lying, or poorly ventilated area and the system develops a refrigerant leak, it may cause re, electric shock, explosion, physical injury or death.

Do not open the inlet grille of the unit during operation. Do not operate the unit with the panels or guards removed. Do not insert hands or other objects through the inlet or outlet when the unit is powered. Do not touch the electro-

static lter, if the unit includes one. The unit contains sharp,

rotating, hot, and high voltage parts that can cause personal

injury and/or electric shock.

Ensure no power is connected to the unit other than as directed in this manual. Remove power from the unit before removing or servicing the unit.

There is risk of unit failure, re, electric shock, physical injury or death.

lter, if the unit includes one.

The unit contains sharp, rotating, hot, and high voltage parts that can cause personal injury and/or electric shock.

Installation Manual

To avoid physical injury, use caution when cleaning or servicing the air conditioner.

Note:

Clean up the site after installation is nished, and check

that no metal scraps, screws, or bits of wiring have been left inside or surrounding the unit.

Do not use this equipment in mission critical or specialpurpose applications such as preserving foods, works of art, wine coolers or refrigeration. This equipment is designed to provide comfort cooling and heating.

Provide power to the compressor crankcase heaters at least six (6) hours before operation begins.

Starting operation with a cold compressor sump(s) may result in severe bearing damage to the compressor(s). Keep the power switch on during

the operational season.

Due to our policy of continuous product innovation, some specifications may change without notification.

Do not block the inlet or outlet.

Unit may malfunction.

Securely attach the electrical cover to the indoor unit. Non-

secured covers can result in re due to dust or water in the

service panel.

Periodically verify the equipment mounts have not deteriorated.

If the base collapses, the unit could fall and cause property damage or

product failure.

Do not allow water, dirt, or animals to enter the unit.

There is risk of unit failure.

Page 8

Multi V Ducted Indoor Units

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 9

Ducted Indoor Units

WARNING

This manual describes how to install LG ducted indoor units (IDU) for Multi V Variable Refrigerant Flow (VRF) heat pump and heat recovery systems. Table 1 lists the available models. Refer to LG’s Multi V Indoor Unit Engineering Manual for complete detailed engineering data and selection procedures.

Safety

Safety of personnel is the primary concern during all procedures. Read and understand the safety summary at the front of this manual. Read and understand this installation procedure before beginning installation. Use the appropriate tools and accessories during installation. Plan your work and do not work alone, if possible. Know how to obtain emergency medical and fire fighting assistance.

Installation Personnel

This equipment is intended for installation by personnel trained in the required construction, mechanical, electrical, and/or other disciplines.

Applicable Codes

Personnel must be familiar with and follow the applicable national, state, and/or local codes.

INTRODUCTION

Figure 1: High-Static Ducted, BG/BR/B8/BH Chassis

Figure 2: Built-In Ducted, B3/B4 Chassis

Installation Manual

Installation work must be performed by trained personnel and in accordance with national wiring standards and all local or other applicable codes. Improper installation can result in re, electric shock, physical injury, or death.

Note:

Please read all instructions before installing this product. Become familiar with the unit, its components and connections, and the order of installation. Incorrect installation can degrade or prevent proper operation.

Required Tools (field provided)

• Level

• Screwdriver

• Electrical lineman pliers

• Electric drill

• Holesaw

• Drill

• Flaring tool set

• Tubing cutter

• Tube/pipe reamer

• Torque wrenches

• Allen wrench

• Gas-leak detector

• Thermometer

Required Parts (field provided)

• Pipes - vapor line and liquid line, with insulation

• 3/8” or 1/2” nuts, at washers, and lock/split washers

• 3/8” or 1/2” threaded hanger rods

• Insulated drain hose

• Additional drain hose

• Connecting cable (power and control)

Due to our policy of continuous product innovation, some specifications may change without notification.

Figure 3: Low-Static Ducted, L1/L2/L3 Chassis

Figure 4: Vertical Air Handler NJ/NK Chassis

Page 10

INTRODUCTION

Unit Model Numbers

High-Static Ducted BG/BR/B8

Built-In Ducted B3/B4

Table 1: Multi V Ducted Indoor Units

ARNU073BGA4 ARNU283BRA4 ARNU363B8A4 ARNU073BHA4

ARNU093BGA4 ARNU363BRA4 ARNU423B8A4 ARNU093BHA4

ARNU123BGA4 ARNU423BRA4 ARNU483B8A4 ARNU123BHA4

ARNU153BGA4 ARNU483BRA4 ARNU763B8A4 ARNU153BHA4

ARNU183BGA4 ARNU543BRA4 ARNU963B8A4 ARNU183BHA4

ARNU243BGA4 ARNU243BHA4

ARNU283BGA4

ARNU363BGA4

ARNU423BGA4

ARNU073B3G4

(shown with optional canvas boot and grill)

Multi V Ducted Indoor Units

Low-Static Ducted L1/L2/L3

Vertical Air Handler

ARNU093B3G4

ARNU123B3G4

ARNU153B3G4

ARNU183B4G4

ARNU243B4G4

ARNU073L1G4

ARNU093L1G4

ARNU123L2G4

ARNU153L2G4

ARNU183L2G4

ARNU243L3G4

ARNU123NJA4

ARNU183NJA4

ARNU243NJA4

ARNU303NJA4

ARNU633NJA4

ARNU423NKA4

ARNU483NKA4

ARNU543NKA4

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 11

Cassette Indoor Units Nomenclature

UNIT NOMENCLATURE

Family

ARN = Multi V Indoor Unit (Refrigerant R410A)

Type

U = Inverter Heat Pump/Heat Recovery

Nominal Capacity (Nominal cooling capacity in Btu/h)

07 = 7,500 09 = 9,600 12 = 12,300 15 = 15,400

Electrical Ratings

3 = 208–230V/60Hz/1Phase

Chassis/Model Type

BG = High-Static Ducted

BR = High-Static Ducted B8 = High-Static Ducted

18 = 19,100 24 = 24,200 28 = 28,000 36 = 36,200

42 = 42,000 48 = 48,000 54 = 54,000 76 = 76,000

B3 = Built-In Ducted B4 = Built-In Ducted

BH = Built-In Ducted

ARN

96 = 96,000

L1 = Low-Static Ducted L2 = Low-Static Ducted L3 = Low-Static Ducted

U 07 3 BG A

NJ = Vertical Air Handler

NK = Vertical Air Handler

Installation Manual

Feature

C = Plasma Filter A = No Plasma Filter G = Low-Static

Generation

4 = Fourth

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 12

R410A REFRIGERANT

WARNING

R410A refrigerant has a higher operating pressure in comparison to R22 refrigerant and, therefore, all piping system materials installed must have a higher resisting pressure than the materials traditionally used in R22 systems.

R410A refrigerant is an azeotrope of R32 and R125, mixed at 50:50, so the ozone depletion potential (ODP) is 0.

• Do not place the refrigerant cylinder in direct sunlight. Refrigerant cylinder may explode causing severe injury or death.

Note:

• Because R410A is a combination of R32 and R125, the required additional refrigerant must be charged in its liquid state. If the

refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.

• Do not heat piping more than necessary during installation. Piping may become soft and fail when pressurized.

• Do not use any piping that has not been approved for use in high-pressure refrigerant systems. Piping wall thickness must comply

with the applicable local, state, and federal codes for the 551 psi design pressure of R410A. Inadequate piping may fail when pressurized.

Multi V Ducted Indoor Units

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 13

Model No.

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

Fan

Type

Motor

Housing

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode Airflow Rate H/M/L (CFM)

High Mode (Factory Set) External Static Pressure (in. wg)

Standard Mode External Static Pressure (in. wg)

High Mode (Factory Set)

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

GENERAL DATA

Specications − High-Static BH Chassis

Table 2: High-Static Ducted BH Chassis IDU Specications

ARNU073BHA4 ARNU093BHA4 ARNU123BHA4 ARNU153BHA4 ARNU183BHA4 ARNU243BHA4

7,500 9,600 12,300 15,400 19,100 24,200

150 150 150 150 150 150

8,500 10,900 13,600 17,100 21,500 27,300

150 150 150 150 150 150

76 76 76 76 76 76

59 59 59 59 59 59

R410A R410A R410A R410A R410A R410A

EEV EEV EEV EEV EEV EEV

58.4 58.4 58.4 58.4 58.4 58.4

68.3 68.3 68.3 68.3 68.3 68.3

2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18

Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco

1 1 1 1 1 1

2 2 2 2 2 2

Brushless Digitally Controlled / Direct

258 / 222 / 198 258 / 222 / 198 307 / 258 / 198 388 / 357 / 307 466 / 413 / 258 618 / 519 / 445

230 / 205 / 191 286 / 230 / 205 339 / 286 / 230 399 / 339 / 230 459 / 399 / 339 565 / 509 / 459

0.23 0.23 0.23 0.23 0.23 0.23

0.31 0.31 0.31 0.31 0.31 0.31

1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare

1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare

1 1 1 1 1 1

Installation Manual

Power Input is rated at high speed.

Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA.

All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable local and national codes. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU−IDU communications cable at any other point.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

Due to our policy of continuous product innovation, some specifications may change without notification.

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Page 14

GENERAL DATA

Specications − High-Static BG Chassis

Table 3: High-Static BG Chassis IDU Specications

Model No. ARNU073BGA4 ARNU093BGA4 ARNU123BGA4 ARNU153BGA4 ARNU183BGA4

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

Fan

Type

Motor

Housing

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode

Multi V Ducted Indoor Units

Airflow Rate H/M/L (CFM) High Mode (Factory Set)

External Static Pressure (in. wg) Standard Mode

External Static Pressure (in. wg) High Mode (Factory Set)

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

Power Input is rated at high speed.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

7,500 9,600 12,300 15,400 19,100

450 450 450 450 450

8,500 10,900 13,600 17,100 21,500

450 450 450 450 450

76 76 76 76 76

59 59 59 59 59

R410A R410A R410A R410A R410A

EEV EEV EEV EEV EEV

83.8 83.8 83.8 83.8 83.8

94.8 94.8 94.8 94.8 94.8

2 x 18 2 x 18 2 x 18 2 x 18 2 x 18

Sirocco Sirocco Sirocco Sirocco Sirocco

1 1 1 1 1

2 2 2 2 2

516 / 484 / 434 533 / 484 / 434 586 / 533 / 484 477 / 427 / 318 547 / 470 / 427

441 / 406 / 332 452 / 406 / 332 477 / 427 / 332 487 / 417 / 293 537 / 487 / 417

0.15 0.15 0.15 0.23 0.23

0.23 0.23 0.23 0.31 0.31

3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare

5/8 Flare 5/8 Flare 5/8 Flare 5/8 Flare 5/8 Flare

1 1 1 1 1

Brushless Digitally Controlled / Direct

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 15

Table 2: High-Static BG Chassis IDU Specications – continued

Model No. ARNU243BGA4 ARNU283BGA4 ARNU363BGA4 ARNU423BGA4

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

24,200 28,000 36,200 42,000

450 450 450 450

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

27,300 31,500 40,600 43,800

450 450 450 450

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

76 76 76 76

59 59 59 59

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

R410A R410A R410A R410A

EEV EEV EEV EEV

83.8 83.8 83.8 83.8

94.8 94.8 94.8 94.8

2 x 18 2 x 18 2 x 18 2 x 18

Fan

Type

Motor

Housing

Sirocco Sirocco Sirocco Sirocco

1 1 1 1

2 2 2 2

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode Airflow Rate H/M/L (CFM)

High Mode (Factory Set) External Static Pressure (in. wg)

Standard Mode External Static Pressure (in. wg)

High Mode (Factory Set)

671 / 576 / 547 893 / 770 / 622 1,003 / 894 / 770 1,130 / 1,003 / 961

671 / 537 / 487 915 / 851 / 770 1,141 / 1,024 / 894 1,218 / 1,141 / 1,084

0.23 0.31 0.31 0.31

0.31 0.39 0.39 0.39

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

Power Input is rated at high speed.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare

5/8 Flare 5/8 Flare 5/8 Flare 5/8 Flare

1 1 1 1

GENERAL DATA

Specications − High-Static BG Chassis

Installation Manual

Brushless Digitally Controlled / Direct

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 16

GENERAL DATA

Specications − High-Static BR/B8 Chassis

Table 4: High-Static BR Chassis IDU Specications

Model No. ARNU283BRA4 ARNU363BRA4 ARNU5423BRA4 ARNU483BRA4 ARNU543BRA4

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

Fan

Type

Motor

Housing

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode Airflow Rate H/M/L (CFM)

Multi V Ducted Indoor Units

High Mode (Factory Set) External Static Pressure (in. wg)

Standard Mode External Static Pressure (in. wg)

High Mode (Factory Set)

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

Power Input is rated at high speed.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

28,000 36,200 42,000 48,100 54,000

450 450 450 450 450

31,500 40,600 43,800 51,200 61,400

450 450 450 450 450

76 76 76 76 76

59 59 59 59 59

R410A R410A R410A R410A R410A

EEV EEV EEV EEV EEV

112 112 112 11 2 112

132 132 132 132 132

2 x 18 2 x 18 2 x 18 2 x 18 2 x 18

Sirocco Sirocco Sirocco Sirocco Sirocco

2 2 2 2 2

1,151 / 1,105 / 1,074 1,430 / 1,151 / 1,105 1,497 / 1,430 / 1,151 1,568 /1,395 / 1,183 1,819/1,678/1,395

1,278 / 1,134 / 1,007 1,381 / 1,176 / 1,049 1,490 / 1,381 / 1,176 1,582/ 1,434 / 1,176 1,801/1,582/1,434

0.39 0.39 0.39 0.39 0.39

0.55 0.55 0.55 0.55 0.55

3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare

5/8 Flare 5/8 Flare 5/8 Flare 5/8 Flare 5/8 Flare

1 1 1 1 1

Brushless Digitally Controlled / Direct

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 17

Model No. ARNU363B8A4 ARNU423B8A4 ARNU483B8A4 ARNU763B8A4 ARNU963B8A4

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

Fan

Type

Motor

Housing

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode Airflow Rate H/M/L (CFM)

High Mode (Factory Set) External Static Pressure (in. wg)

Standard Mode External Static Pressure (in. wg)

High Mode (Factory Set)

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

Table 5: High-Static B8 Chassis IDU Specications

36,200 42,000 48,100 76,400 95,900

800 800 800 800 800

40,600 43,800 51,200 86,000 107,500

800 800 800 800 800

76 76 76 76 76

59 59 59 59 59

R410A R410A R410A R410A R410A

EEV EEV EEV EEV EEV

192 192 192 192 192

222 222 222 222 222

2 x 18 2 x 18 2 x 18 2 x 18 2 x 18

Sirocco Sirocco Sirocco Sirocco Sirocco

2 2 2 2 2

Brushless Digitally Controlled / Direct

1,896 / 1,748 / 1,550 1,963 / 1,786 / 1,589 2,048 / 1,846 / 1,670 2,050 / 1,766 / 1,766 2,684 / 2,260 / 2,260

1,730 / 1,317 / 1,066 1,914 / 1,458 / 1,123 2,019 / 1,518 / 1,200 2,260 / 1,766 / 1,766 2,542 / 2,260 / 2,260

0.35 0.35 0.35 0.59 0.59

0.70 0.70 0.70 0.87 0.87

3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare

3/4 Brazed 3/4 Brazed 3/4 Brazed 3/4 Flare 7/8 Flare

1 1 1 1 1

Installation Manual

Power Input is rated at high speed.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

Due to our policy of continuous product innovation, some specifications may change without notification.

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Page 18

GENERAL DATA

Specications − Low-Static B3/B4 Chassis

Table 6: Low-Static Built-In B3/B4 Chassis IDU Specications

Model No. ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4 ARNU183B4G4 ARNU243B4G4

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

Fan

Type

Motor

Housing

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode Airflow Rate H/M/L (CFM)

Multi V Ducted Indoor Units

High Mode (Factory Set) External Static Pressure (in. wg)

Standard Mode External Static Pressure (in. wg)

High Mode (Factory Set)

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

7,500 9,600 12,300 15,400 19,100 24,200

85 85 85 85 85 115

8,500 10,900 13,600 17,100 21,500 27,300

85 85 85 85 85 115

76 76 76 76 76 76

59 59 59 59 59 59

R410A R410A R410A R410A R410A R410A

EEV EEV EEV EEV EEV EEV

46.3 46.3 46.3 46.3 57.3 57.3

53.3 53.3 53.3 53.3 67.2 67.2

2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18

Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco

2 2 2 2 2 2

3 3 3 3 4 4

283 / 229 / 194 318 / 247 / 212 353 / 283 / 229 388 / 353 / 283 494 / 424 / 353 600 / 530 / 353

0 0 0 0 0 0

0.08 0.08 0.08 0.08 0.08 0.08

1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare

1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare

1 1 1 1 1 1

Brushless Digitally Controlled / Direct

Power Input is rated at high speed.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

Due to our policy of continuous product innovation, some specifications may change without notification.

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Page 19

Model No. ARNU073L1G4 ARNU093L1G4 ARNU123L2G4 ARNU153L2G4 ARNU183L2G4 ARNU243L3G4

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

Fan

Type

Motor

Housing

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode Airflow Rate H/M/L (CFM)

High Mode (Factory Set) External Static Pressure (in. wg)

Standard Mode External Static Pressure (in. wg)

High Mode (Factory Set)

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

GENERAL DATA

Specications − Low-Static Ducted L1/L2/L3 Chassis

Table 7: Low-Static Ducted L1/L2/L3 Chassis IDU Specications

7,500 9,600 12,300 15,400 19,100 24,000

40 40 85 85 85 115

8,500 10,900 13,600 17,100 21,500 27,300

40 40 85 85 85 115

76 76 76 76 76 76

59 59 59 59 59 59

R410A R410A R410A R410A R410A R410A

EEV EEV EEV EEV EEV EEV

38.6 38.6 50.7 50.7 50.7 59.5

47.4 47.4 60.6 60.6 60.6 68.3

2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18

Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco

1 1 2 2 2 2

2 2 3 3 3 4

Brushless Digitally Controlled / Direct

270 / 230 / 200 320 / 250 / 200 360 / 310 / 250 450 / 360 / 310 530 / 450 / 360 710 / 570 / 430

0 0 0 0 0 0

0.1 0.1 0.1 0.1 0.1 0.1

1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare

1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare

1 1 1 1 1 1

Installation Manual

Power Input is rated at high speed.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

Due to our policy of continuous product innovation, some specifications may change without notification.

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Page 20

GENERAL DATA

Specications − Vertical Air Handler NJ Chassis

Table 8: Vertical Air Handler NJ Chassis IDU Specications

Model No. ARNU123NJA4 ARNU183NJA4 ARNU243NJA4 ARNU303NJA4 ARNU363NJA4

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

Fan

Type

Motor

Housing

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode Airflow Rate H/M/L (CFM)

Multi V Ducted Indoor Units

High Mode (Factory Set) External Static Pressure (in. wg)

Standard Mode External Static Pressure (in. wg)

High Mode (Factory Set)

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

12,000 18,000 24,000 30,000 36,000

80 80 120 178 228

13,500 20,000 27,000 34,000 40,000

80 80 120 178 228

76 76 76 76 76

59 59 59 59 59

R410A R410A R410A R410A R410A

EEV EEV EEV EEV EEV

117 117 117 117 121

140 140 140 140 144

2 x 18 2 x 18 2 x 18 2 x 18 2 x 18

Sirocco Sirocco Sirocco Sirocco Sirocco

1 1 1 1 1

530 / 480 / 380 580 / 530 / 480 710 / 640 / 480 880 / 800 / 630 990 / 880 / 800

0.3 0.3 0.3 0.3 0.3

0.5 0.5 0.5 0.5 0.5

1/4 Flare 1/4 Flare 3/8 Flare 3/8 Flare 3/8 Flare

1/2 Flare 1/2 Flare 5/8 Flare 5/8 Flare 5/8 Flare

1 1 1 1 1

Brushless Digitally Controlled / Direct

Power Input is rated at high speed.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

Due to our policy of continuous product innovation, some specifications may change without notification.

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Page 21

Model No. ARNU423NKA4 ARNU483NKA4 ARNU543NKA4

Cooling Mode Performance

Capacity (Btu/h) Power Input1 (W)

Heating Mode Performance

Capacity (Btu/h)

Power Input1 (W)

Entering Mixed Air

Cooling Max. (°F WB)

Heating Min. (°F DB)

Unit Data

Refrigerant Type

Refrigerant Control

Net Unit Weight (lbs.)

Shipping Weight (lbs.)

Communication Cable4 (No. x AWG)

Fan

Type

Motor

Housing

Motor/Drive Airflow Rate H/M/L (CFM)

Standard Mode Airflow Rate H/M/L (CFM)

High Mode (Factory Set) External Static Pressure (in. wg)

Standard Mode External Static Pressure (in. wg)

High Mode (Factory Set)

Piping

Liquid Line (in., O.D.)

Vapor Line (in., O.D.)

Condensate Line (in., I.D.)

Specications − Vertical Air Handler NK Chassis

Table 9: Vertical Air Handler NK Chassis IDU Specications

42,000 48,000 54,000

260 330 366

46,000 54,000 60,000

260 330 366

76 76 76

59 59 59

R410A R410A R410A

EEV EEV EEV

165 165 165

181 181 181

2 x 18 2 x 18 2 x 18

Sirocco Sirocco Sirocco

1 1 1

Brushless Digitally Controlled / Direct

1,250 / 1,100 / 1,000 1,400 / 1,260 / 1,000 1,475 / 1,400 / 1,260

0.3 0.3 0.3

0.5 0.5 0.5

3/8 Flare 3/8 Flare 3/8 Flare

5/8 Flare 5/8 Flare 5/8 Flare

1 1 1

GENERAL DATA

Installation Manual

Power Input is rated at high speed.

EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national

codes. Power Supply (V/Hz/Ø): 208-230/60/1

Due to our policy of continuous product innovation, some specifications may change without notification.

This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft

level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-105%.

Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB).

Heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).

Page 22

GENERAL DATA

Electrical − High-Static BH/BG/BR/B8 Chassis

Table 10: High-Static BH/BG/BR/B8 Chassis Indoor Unit Electrical Data.

Model Voltage Range MCA MOP Rated Amps (A)

Power Supply Power Input (W)

Hz Volts Phase Cooling Heating

BH Units

ARNU073BHA4

ARNU093BHA4 1.32 1.06 150 150

ARNU123BHA4 1.32 1.06 150 150

ARNU153BHA4 1.32 1.06 150 150

ARNU183BHA4 1.32 1.06 150 150

ARNU243BHA4 1.32 1.06 150 150

187-253

1.32

1.06

150 150

60 208-230 1

BG Units

ARNU073BGA4

ARNU093BGA4 3.3 2.65 450 450

ARNU123BGA4

ARNU153BGA4 3.3 2.65 450 450

ARNU183BGA4 3.3 2.65 450 450

ARNU243BGA4 3.3 2.65 450 450

ARNU283BGA4 3.3 2.65 450 450

ARNU363BGA4 3.3 2.65 450 450

ARNU423BGA4 3.3 2.65 450 450

187-253

3.3

3.3 2.65 450 450

2.65

450 450

60 208-230 1

BR Units

ARNU283BRA4

ARNU363BRA4 4.4 3.5 450 450

ARNU423BRA4 4.4 3.5 450 450

Multi V Ducted Indoor Units

ARNU483BRA4 4.4 3.5 450 450

ARNU543BRA4 4.4 3.5 450 450

187-253

4.4

3.5

450 450

60 208-230 1

B8 Units

ARNU363B8A4

ARNU423B8A4 6.5 5.2 800 800

ARNU483B8A4 6.5 5.2 800 800

ARNU763B8A4 6.5 5.2 800 800

ARNU963B8A4

187-253

6.5

6.5 5.2 800 800

5.2

800 800

60 208-230 1

MCA : Minimum Circuit Ampacity. MOP : Maximum Overcurrent Protection.

Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits. Select wire size based on the larger MCA value. Instead of fuse, use circuit breaker.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 23

Electrical − Low-Static Built-In B3/B4 Chassis

Table 11: Low-Static Built-In B3/B4 Chassis Electrical Data.

GENERAL DATA

Model Voltage Range MCA MOP Rated Amps (A)

Power Supply Power Input (W)

Hz Volts Phase Cooling Heating

B3 Units

ARNU073B3G4

ARNU093B3G4 1.0 0.76 85 85

ARNU123B3G4 1.0 0.76 85 85

ARNU153B3G4 1.0 0.76 85 85

187-253

1.0

0.76

85 85

60 208-230 1

B4 Units

ARNU183B4G4

ARNU243B4G4 1.2 0.97 115 115

MCA : Minimum Circuit Ampacity. MOP : Maximum Overcurrent Protection.

187-253

1.2

0.97 60 208-230 1

115 115

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 24

GENERAL DATA

Electrical − Low-Static Ducted L1/L2/L3 Chassis

Table 12: Low-Static Ducted L1/L2/L3 Chassis Electrical Data.

Model Voltage Range MCA MOP Rated Amps (A)

Power Supply Power Input (W)

Hz Volts Phase Cooling Heating

L1 Units

ARNU073L1G4

ARNU093L1G4 0.5 0.4 40 40

208-230

0.5 15

0.4 60 208-230 1

40 40

L2 Units

ARNU123L2G4

ARNU153L2G4 1.0 0.76 85 85

ARNU183L2G4 1.0 0.76 85 85

208-230

1.0

0.76

85 85

60 208-230 1

L3 Units

ARNU243L3G4 208-230 1.2 15 0.97 60 208-230 1 115 115

MCA : Minimum Circuit Ampacity. MOP : Maximum Overcurrent Protection.

Table 13: Vertical Air Handler NJ/NK Chassis Electrical Data.

Model Voltage Range MCA MOP Rated Amps (A)

Multi V Ducted Indoor Units

NJ Units

ARNU123NJA4

ARNU183NJA4 1.4 1.12 228 228

ARNU243NJA4 1.4 1.12 228 228

ARNU303NJA4 1.4 1.12 228 228

ARNU363NJA4 1.4 1.12 228 228

208-230

1.4

1.12

Power Supply Power Input (W)

Hz Volts Phase Cooling Heating

228 228

60 208-230 1

NK Units

ARNU423NKA4

ARNU483NKA4 2.3 1.8 366 366

ARNU543NKA4 2.3 1.8 366 366

MCA : Minimum Circuit Ampacity. MOP : Maximum Overcurrent Protection.

208-230

2.3

1.8

366 366

60 208-230 1

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 25

GENERAL DATA

Dimensions – High-Static Ducted BH Chassis

Installation Manual

Note - All dimensions have

tolerance of ± 0.25 in.

= Center of gravity

C ent

e r o

G r

av i

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 26

GENERAL DATA

Dimensions – High-Static Ducted BG Chassis

Multi V Ducted Indoor Units

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 27

GENERAL DATA

Dimensions – High-Static Ducted BR Chassis

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 28

GENERAL DATA

Dimensions – High-Static Ducted B8 Chassis

Multi V Ducted Indoor Units

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 29

GENERAL DATA

Dimensions – Built-In Low-Static Ducted B3/B4 Chassis

With Suction Grill

A2 C2

With Suction Grill & Suction Canvas

22-5/8

9-13/16

With Suction Grill & Suction Canvas

15-1/8

7-7/16

With Suction Grill

15-1/4

24-5/16

With Suction Grill

7-1/2

2-1/2

8-1/2

10-7/8

Drain

Power Connection

2-3/8

Supply Air

Installation Manual

Liquid

Vapor

Return Air

Accessory

PBSGB30 35-13/16 PBSGB40 46-13/16 14-1/8

A2 B2 C2

Model

7-1/2

19-11/16 (Max)

With Suction Grill & Suction Canvas

14-1/8 2-3/16

2-3/16

Due to our policy of continuous product innovation, some specifications may change without notification.

ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4

ARNU183B4G4 ARNU243B4G4

Accessory A3 B3 C3

PBSC30 32-5/16

PBSC40

32-5/8

43-5/16

43-5/16 1-9/16 to 9-13/1610-11/16

Unit: inches Note: All measurements

have a tolerance of ±1/4 in.

1-9/16 to 9-13/1610-11/16

Page 30

GENERAL DATA

Dimensions – Low-Static Ducted L1/L2/L3 Chassis

7-1/2

3-15/16

3-1/16

4-1/16

11-1/2

2-5/8

Multi V Ducted Indoor Units

Vapor Pipe Connection

Liquid Pipe Connection

Drain Pipe Connection

Power Supply Connection

27-9/16

7-1/2

24-3/4

13/166-1/16

5-5/16 1-3/8

8-11/16

13/16

L1 : 14-7/16 L2 : 22-1/16 L3 : 29-3/4

Top

Air Outlet

Air Inlet

L1 : 2-15/16

L2 : 3-1/16

L3 : 3-3/16

Unit: inches

Note: All measurements have a tolerance of ±1/4 in.

Due to our policy of continuous product innovation, some specifications may change without notification.

ARNU073L1G4 ARNU093L1G4 ARNU123L2G4 ARNU153L2G4 ARNU183L2G4

ARNU243L3G4

ABCD

30-1/2

27-9/16

28-7/8 26

38-3/8 35-7/16 36-3/4 33-7/8

46-1/4

43-5/16

44-5/8 41-3/4

Page 31

Supply Air opening

48-11/16

GENERAL DATA

Dimensions – Vertical Air Handler NJ Chassis

SIDE VIEW

21-1/4

1-5/8

1-9/16

7/8” Wiring knockouts

Installation Manual

1-9/16 1-15/16

2-1/16

12-1/8

21-1/4

TOP VIEW

Return Air opening

1-15/16

7/8” Wiring knockouts

2-1/8

1-11/16” Wiring knockouts

49-5/16

48-11/16

2-9/16

14-5/16

1-1/2

4-11/16

Liquid pipe

Vapor pipe

Drain connection for upflow application

BOTTOM VIEW

Drain connection for horizontal application

Unit: inches Note: All measurements

FRONT VIEW

have a tolerance of ±1/4 in.

Due to our policy of continuous product innovation, some specifications may change without notification.

9-15/16

1-9/16

Page 32

GENERAL DATA

Dimensions – Vertical Air Handler NK Chassis

Supply Air opening

55-3/16

21-1/4

Multi V Ducted Indoor Units

12-1/8

Return Air opening

1-9/16

21-1/4

1-5/8

1-15/16

2-1/16

7/8” Wiring knockouts

2-3/16

1-11/16” Wiring knockouts

1-9/16

55-13/16

7/8” Wiring knockouts

55-3/16

2-9/16

1-1/2

14-1/4

SIDE VIEW

Liquid pipe

Vapor pipe

Drain connection for upflow application

Unit: inches Note: All measurements

have a tolerance of ±1/4 in.

4-11/16

Drain connection for horizontal application

Due to our policy of continuous product innovation, some specifications may change without notification.

16-15/16

FRONT VIEW

1-9/16

Page 33

GENERAL DATA

Refrigerant Piping Diagrams

Figure 5: High-Static Ducted BG/BR/BH, Low-Static Ducted L1/L2L3/B3/B4, and Vertical Air Handler NJ/NK Refrigerant Piping Diagram

lndoor Unit

Vapor

Flare Nut

Vapor

Line

Liquid Line

Flare Nut

Line

Liquid Line

Refrigerant Pipes to Outdoor Unit

Th3

Heat Exchanger

TH3

Sirocco Fan

Heat Exchanger

EEV

Filter

Th2

Sirocco Fan

Filter

Th1

Figure 6: High-Static Ducted B8 Refrigerant Piping Diagram

EEV

Filter

TH2

Check Valve

Solenoid Valve

Filter

TH1

lndoor unit

Flare Nut

Cooling Heating Th1 = Thermistor, Return Air Th2 = Thermistor, Pipe In Th3 = Thermistor, Pipe Out EEV = Electronic Expansion Valve

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 34

GENERAL INSTALLATION GUIDELINES

CAUTION

DANGER

Location Selection

To avoid the possibility of re, do not install the unit in an area where combustible gas may generate, ow, stagnate, or leak. Failure to do so will cause serious bodily injury or death. Before beginning installation, read the safety summary at the beginning of this manual.

Note:

Select a location for installing the wall-mounted indoor unit (IDU) that meets the following conditions:

• Where there is enough structural strength to bear the weight of the unit.

• Operating sound from the unit will not disturb occupants.

• Include enough space for service access.

• Include space for drainage to ensure condensate ows properly out of the unit when it is in cooling mode.

• Use a level indicator to ensure the unit is installed on a level plane.

• Include space for drainage to ensure condensate ows properly out of the unit when it is in cooling mode

Note:

The unit may be damaged, may malfunctioin, and/or will not operate as designed if installed in any of these conditions:

Do not install the unit near a heat or steam source (Figure 7) , or where considerable amounts of oil, iron powder, or flour are used.

These materials may generate condensate, cause a reduction in h eat exchanger efficiency, or malfuction of the condensate drain. If this is a potential problem, install a ventillation fan large enough to vent out these materials

Do not install the unit where it will be subjected to direct thermal radiation from other heat sources.

Do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. There is the possibility of fire.

Do not install the unit in a location where acidic solution and spray (sulfur) are often used.

Do not use the unit in environments where oil, steam, or sulfuric gas are present.

Do not install additional ventilation products on the chassis of the unit.

Do not install the unit near high-frequency generator sources.

Multi V Ducted Indoor Units

Installing in an Area Exposed to Unconditioned Air

In some installation applications, areas (floors, walls) in some rooms may be exposed to unconditioned air. The room may be above or next to an unheated garage or storeroom. To counter this condition:

• Verify that carpet is or will be installed (carpet may increase the temperature by three (3) degrees.

• Install radiant heat or another type of heating system to

the oor.

• Add insulatiion between the oor joists.

Figure 7: Installing Near a Heat or Steam Source

Indoor Unit

Include enough distance

Heat or steam source

Install a ventilation fan with sufficient capacity

Unpack and Inspect for Freight Damage

Table 2 lists shipping and net weights. To help avoid personnel injury and unit damage, use at least two people when carrying a unit by hand.

Note:

Do not unpack the unit and remove protective materials until ready to install. Before opening the shipping container, check the container labeling to verify the unit received is the correct unit. Verify the unit capacity, type, and voltage. Refer to the Nomenclature chart on page 11. Before unpacking, carefully move packaged unit to a work area near installation location. After opening, if unit is damaged, repack unit as it was shipped. RETAIN ALL PACKING MATERIALS. In general, freight damage claims will be denied if the original packing materials are not retained for the claims adjustor to inspect. File a freight claim and order a replacement unit.

1. Place the box on a solid surface right side up.

2. Cut the white reinforced nylon straps, open the top of the box, and fold back all four flaps.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 35

INSTALLATION

WARNING

Install Ducted IDU Chassis

3. Remove the protective cardboard/Styrofoam® top sheet and place to the side.

4. The walls and top panels are not attached to the bottom of the box. Lift the carton by the flaps and remove the box walls and top.

5. Remove the moisture barrier plastic bonnet.

6. Check the unit nameplate data and model number. Verify the unit voltage, and capacities are correct before proceeding.

7. Locate and retain the piping/condensate accessory kit located in the bottom of the box under the refrigerant pipe stubs.

8. Using two people, carefully lift the unit and inspect for freight damage. DO NOT lift by the refrigerant piping or drain pipe stub. Lift by

the hangar brackets or chassis frame only. If damage is found, repack the unit as it was received in the original container.

9. If the unit is undamaged, remove and retain the installation manual. It is located under or on top of the unit.

Figure 8: Typical Threaded Rod Hanger and

Attaching Hardware

Securely install threaded rod hangars (bolts) and hardware to prevent the chassis falling from its installation location.

• There is risk of personnel injury from falling equipment.

Installation work must be performed by trained personnel and in accordance with all local or other applicable codes.

• There is risk of injury to personnel from incorrect installation.

Hanging bolt

(W3/8 or M10)

Spring washer

(M10)

Nut

Flat washer for M10

(accessory)

Installation Manual

Note:

• Ensure the unit is properly installed. Incorrectly installed units can

malfunction

resulting in degraded performance or an inoperative unit/system.

• Securely install threaded rod hangars (bolts) and hardware to prevent

the chassis falling from its installation location. There is risk of equipment orproperty damage from falling equipment.

• Use a level indicator to ensure the chassis is installed on a level plane.

The following parts are field supplied:

• Hanging bolt - W-3/8″ or 1/2″

• Nut - W-3/8″ or M10

• Spring washer - M10

Included with the indoor unit:

Flat washer for M10

(accessory) Nut (W3/8 or M10)

• Flat washer - M10

Roughing In the Indoor Unit

1. Determine the installation location. Ensure the location has enough space to allow necessary duct connections and maintenance access.

2. Securely install the four field-provided threaded rod hangars to the overhead support locations.

3. Hang the chassis from the four field-supplied threaded rod hangars. Refer to the threaded rod hangar details in Figure 8.

4. Use a level to ensure the chassis is level and securely tighten the mounting nuts.

5. If local code requires an auxiliary drain pan under the unit, install a field-provided auxiliary drain pan.

6. Connect ductwork to the unit as necessary.

Roughing-In Wall-Mounted Zone Controllers

Note:

• It may be necessary to use a handy box that is sized in metric units, depending on the controller model. Check with your LG representative to verify which size of handy box is needed for the zone controller in question.

• Use only LG-supplied communications cable. Using field-supplied cable may result in communications problems between the zone con- troller and the indoor unit.

• DO NOT cut the quick-connect plugs off or adjust the length of the cable.

• Keep the communications cable away from high voltage wires and electromagnetic field (EMF) producing equipment.

• Do not route power wiring and communications cables in the same conduit.

• Maintain the minimum distance required between the communications cable and power wiring. The minimum required space between the two is dependent on the voltage of the power wiring. Refer to the appropriate Multi V Outdoor Unit Engineering Manual for minimum distance specifications.

1. Proper indoor unit operation depends on the location of the room sensor. A good location will protect the zone controller from direct

sunlight and external local sources of water vapor, and heated or cooled air. If no mounting height was specified by the building designer, place the handy box approximately fifty-five (55) inches above the finished floor.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 36

INSTALLATION

Airow

Indoor Unit Dimensions

2. Use only LG-provided cable to connect the zone controller. Pull LG communications cable between the zone controller handy box and the

indoor unit. A thirty-three (33) foot length of cable will be found with the wall-mounted zone controller.

3. Store a minimal amount of cable in the handy box. Any additional

cable should be coiled and stored near the indoor unit control panel.

4. If additional cable is needed, order a thirty-three (33) foot LG

Wired Remote Group Control Extension cable (Model No. PZCWRC1).

5. If the cable between the zone controller and the indoor unit is too

long, do not cut the cable and shorten. Coil any spare communications cable, tie-wrap it, and leave it next to the indoor unit location.

6. Zone controller rough-in is complete.

Figure 10: Low-Static Ducted Indoor Unit Dimensions.

Airow

Figure 9: High-Static Ducted Indoor Unit Dimensions.

Multi V Ducted Indoor Units

Table 14: Ducted Indoor Unit Dimensions and Weights.

Chassis

Code

High-Static Ducted Indoor Units

BH 59 34-3/4 17-3/4 10-1/4 4-1/4 36-11/16 14 1 1-7/8

BG 84 46-1/2 17-3/4 11-3/4 4-1/4 48-1/2 14 1 1

BR 112 48-1/2 23-5/16 15 4-7/16 50-1/2 18-3/4 1 1

B8 192 61-5/8 27-1/8 18-1/8 4-11/16 63-7/8 22-7/8 1-3/16 1-3/16

Low-Static Ducted Indoor Units

L1 39 30-1/2 27-9/16 7-1/2 3 28-7/8 24-3/4 5/8 1-3/8

L2 51 38-3/8 27-9/16 7-1/2 3 36-3/4 24-3/4 5/8 1-3/8

L3 60 46-1/4 27-9/16 7-1/2 3 44-5/8 24-3/4 5/8 1-3/8

Low-Static Built-In Ducted Indoor Units

B3 46 32-5/8 22-5/8 7-1/2 1-7/16 33-7/16 15 5/8 3-11/16

B4 57 43-5/16 22-5/8 7-1/2 1-7/16 44-7/16 15 5/8 3-11/16

Case dimensions exclude insulation. Add approximately 1/8" for factory-applied external insulation for each side. High-Static models are insulated on all sides. Low-Static models are

insulated on the bottom and end cold surfaces only between the fan discharge and midway to the rear of the unit.

Weight

(lbs.)

Figure 11: Low-Static Ducted Indoor Unit B3/B4 Dimensions.

Airflow

Major Dimensions (in.)

Mounting Dimensions (in.)

W D H L6 M1 M2 M3 M4

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 37

INSTALLATION

Duct Connection Dimensions

Figure 12: High-Static Ducted (BH, BG, BR, B8) Indoor Unit Duct

Figure 13: Low-Static Ducted (L1/L2/L3) Indoor Unit Duct

Connection Dimensions.

Supply

Return

Figure 14: Low-Static Built-In Ducted (B3, B4) Indoor Unit Duct Connection Dimensions.

Connection Dimensions.

Supply

Return

Installation Manual

Table 15: Duct Connection Dimensions (in.).

Chassis

Code

Type L1 L2 L3

Supply Duct Connection Return Duct Connection

Flange

Depth

Opening Location L5 L6 L7

High-Static Ducted Indoor Units

BH Flange 6-1/4 29-1/2 1-5/8 1-3/16 Rear 6-3/8 29-1/2 7/8 No Flange

BG Flange 7-5/16 32-11/16 6-7/8 1 Rear 7-7/8 41-1/8 1 No Flange

BR Flange 11-5/8 39-5/8 4-9/16 1 Rear 11-1/8 42-15/16 7/8 No Flange

B8 Flange 12-7/16 44-1/4 6-3/4 1 Rear 15-7/16 55 2 1-1/8

Low-Static Ducted Indoor Units

L1 Flange 5-7/8 26 13/16 5/8

L2 Flange 5-7/8 33-13/16 13/16 5/8

Rear 6-1/8 26 3/4 No Flange

Bottom 6-1/16 26 3/4 No Flange

Rear 6-1/8 33-11/16 3/4 No Flange

Bottom 6-1/16 33-13/16 3/4 No Flange

Rear 6-1/8 41-11/16 3/4 No Flange

L3 Flange 5-7/8 41-3/4 13/16 5/8

Bottom 6-1/16 41-11/16 3/4 No Flange

Low-Static Built-In Ducted Indoor Units

B3 Flange 6-7/16 31-5/16 1/2 3/4 Bottom 7 28-9/16 1-1/2 No Flange

B4 Flange 6-7/16 41-5/16 1/2 3/4 Bottom 7 39-9/16 1-1/2 No Flange

Due to our policy of continuous product innovation, some specifications may change without notification.

Flange

Depth

Page 38

GENERAL INSTALLATION GUIDELINES

Maintenance Clearances

Figure 15: High-Static Ducted (BG/BR/B8/BH) Indoor Unit

Maintenance Clearances.

Figure 17: Low-Static Built-In Ducted (B3, B4) Indoor Unit

Maintenance Clearances.

Figure 16: Low-Static Ducted (L1/L2/L3) Indoor Unit

Maintenance Clearances.

Note:

When space is available, best practice would be to leave two (2) to three (3) inches on the end opposite the control panel. Leave adequate room for visual inspection, pipe installation, brazing, power wiring, control wiring, and pipe insulating activities. Provide adequate access to service nearby piping, drain lines, shutoff valves, etc., following the dimension guidelines listed in the table below.

Multi V Ducted Indoor Units

Chassis Code

High-Static Ducted Indoor Units

BH Right End 12 12 10-1/2 Bottom 35 18 11

BG Right End 12 14 12 Bottom 47 18 12

BR Right End 12 14 15 Bottom 49 24 15

B8 Right End 12 14 18 Bottom 62 28 19

Low-Static Ducted Indoor Units

L1 Right End 10 12 8 Bottom 30 25 8

L2 Right End 10 12 8 Bottom 38 25 8

L3 Right End 10 12 8 Bottom 46 25 8

Low-Static Built-In Ducted Indoor Units

B3 Left End 10 12 8 Bottom 34 23 8

B4 Left End 10 12 8 Bottom 44 23 8

*Does not apply when the ceiling surface below can be removed.

Location* C1 C2 C3 Location A1 A2 A3*

Table 16: Minimum Maintenance Clearances (in.).

Control Panel Access Major Maintenance Access

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 39

INSTALLATION

Condensate

Vapor Line

L14

L13

L15

L17

L18

L19

Liquid Line

Air

flow

Piping Connections

Figure 18: High-Static Ducted (BH/BG/BR/B8)

Indoor Unit Piping Connection Dimensions.

L11

L13

L14

Airflo

Condensate

Pump

(Primary)

Vapor Line

L12

Gravity Condensate

Liquid Line

Vapor Line

L17

L16

L15

Figure 19: Low-Static Convertible Ducted (L1/L2/L3) Indoor Unit Piping Connection

Dimensions.

L10

L21

L18

L20

L11

Vapor Line

Condensate

Liquid Line

Auxiliary Drain

Figure 20: Low-Static Ducted Built-In (B3/B4)

Indoor Unit Piping Connection Dimensions.

Table 17: Ducted Indoor Unit Pipe Connections (in.).

Size /

Chassis

Dia.

Liquid Line Vapor Line Condensate Pump Drain Gravity Drain (Plugged)

Conn. L14 L17 Dia.1Conn. L13 L16 Dia.1Conn.2L11 L18 Dia.3Conn.2L12 L15

High-Static Ducted Indoor Units

7-18 BH 1/4 45° Flare 1-7/8 3-15/16 1/2 45° Flare 3-15/16 3-1/4 1.0 Plain 6-9/16 6-3/4 1.0"-14 MPT 1-1/8 6-9/16 24 BH 1/4 45° Flare 1-7/8 3-15/16 5/8 45° Flare 3-15/16 3-1/4 1.0 Plain 6-9/16 6-3/4 1.0"-14 MPT 1-1/8 6-9/16 07-42 BG 3/8 45° Flare 1-7/8 3-15/16 5/8 45° Flare 3-15/16 3-5/16 1.0 Plain 6-9/16 6-3/4 1.0"-14 MPT 6-9/16 1-1/8 28-54 BR 3/8 45° Flare 2-13/16 3-15/16 5/8 45° Flare 4-13/16 3-1/4 1.0 Plain 8-3/4 6-3/4 1.0"-14 MPT 8-3/4 1-1/4 36-76 B8 3/8 45° Flare 2-1/2 5-1/2 3/4 45° Flare 5-1/4 4-3/4 1.0 Plain 7-5/8 6-7/8 1.0"-14 MPT 7-5/8 1-1/4 96 B8 3/8 45° Flare 2-1/2 5-1/2 7/8 45° Flare 5-1/4 4-3/4 1.0 Plain 7-5/8 6-7/8 1.0"-14 MPT 7-5/8 1-1/4

Low-Static Convertible Ducted Indoor Units

Frame

Dia.

Liquid Line Vapor Line Condensate Pump (Primary) Auxiliary Drain Connection

Conn. L6 L9 Dia.1Conn. L7 L10 Dia.1Conn.2L5 L11 Dia.1Conn.2L20 L21

L1 1/4 45° Flare 3-7/8 7-1/4 1/2 45° Flare 3-1/2 4-1/2 1.0 Plain 2 11-1/2 1.0 Plain 6-3/8 9-3/4 L2 1/4 45° Flare 3-7/8 7-1/4 5/8 45° Flare 3-1/2 4-1/2 1.0 Plain 2 11-1/2 1.0 Plain 6-3/8 9-3/4 L3 3/8 45° Flare 3-7/8 7-1/4 5/8 45° Flare 3-1/2 4-1/2 1.0 Plain 2 11-1/2 1.0 Plain 6-3/8 9-3/4

Low-Static Bottom Ducted Indoor Units

Frame

Dia.

Liquid Line Vapor Line Condensate Pump (Primary)

Conn. L14 L17 Dia.1Conn. L15 L18 Dia.1Conn.2L13 L19

B3 1/4 45° Flare 9-7/16 2-9/16 1/2 45° Flare 8-1/2 4-15/16 1.0 Plain 10-7/8 5-1/16 B4 3/8 45° Flare 9-7/16 2-9/16 5/8 45° Flare 8-1/2 4-15/16 1.0 Plain 10-7/8 5-1/16

Inches I.D.

Plastic Resin

14 Threads Per Inch, Straight Thread

Refrigerant Safety

Installation Manual

Verify the maximum refrigerant concentration in the space where the indoor unit will be mounted meets the concentration limit allowed by ASHRAE Standards 15-2010 and 34-2010. There is danger of asphyxiation from oxygen displacement.

ASHRAE Standards 15-2010 and 34-2010 offer guidelines that address refrigerant safety and the maximum allowable concentration of refrigerant in an occupied space. Refrigerant will dissipate into the atmosphere, but a certain volume of air is required for this to occur safely. For R410A refrigerant, the maximum allowable concentration of refrigerant is twenty-six (26) lbs. per 1,000 cubic feet of an occupied space. Buildings with twenty-four (24) hour occupancy allow half of that concentration.

ASHRAE Standards 15 and 34 assume that if a system develops a leak, its entire refrigerant charge will dump into the area where the leak occurs. To meet ASHRAE Standards 15 and 34, calculate the refrigerant concentration that may occur in the smallest room volume on the system, and compare the results to the maximum allowable concentration number.1 Also consult state and local codes in regards to refrigerant safety.

Information about ASHRAE Standard 15-2010 / 34-2010 and addenda current as of the date of this publication.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 40

REFRIGERANT PIPING

WARNING

Piping Preparation

Do not braze in an enclosed location. Do not allow the refrigerant to leak during brazing. Always test for gas leaks before and after brazing.

• If refrigerant combusts, it generates a toxic gas.

Note:

• Do not use kinked pipe.

Braze the pipe to the service valve pipe stub of the outdoor unit. After brazing, check for refrigerant gas leaks. When selecting flare fittings, always use a 45° fitting rated for high-pressure refrigerant R410A. Fittings must also comply with local, state, and federal standards.

Creating a Flare Fitting

One of the main causes of refrigerant leaks is defective flared connections. Use the following procedure to create flared connections.

1. Determine the installation location. Ensure the location has enough space to

allow necessary duct connections and maintenance access.

• Measure the distance between the indoor unit and the outdoor unit.

• Cut the pipes a little longer than measured distance.

2A. Remove the burrs.

Copper

tube

2A. 2B.

Point down

90°

Pipe

Reamer

Slanted Uneven Rough

Copper tube

Flare nut

• Completely remove all burrs from pipe ends.

• When removing burrs, point the end of the copper pipe down to avoid introducing foreign materials into the pipe.

2B. Slide the are nut onto the copper tube.

3. Flare the pipe end.

Multi V Ducted Indoor Units

• Use the proper size aring tool to nish ared connections as shown.

• ALWAYS create a 45° are when working with R410A.

4. Carefully inspect the ared pipe end.

• Compare the geometry with the gure to the right.

• If the are is defective, cut it off and re-do procedure.

• If are looks good, blow the pipe clean with dry nitrogen.

Dimensions of the Flare.

90°

45°

“A”

R=0.4 – 0.8

Incorrect Flare

Surface

Damaged

Handle

Yoke

Red arrow

Cracked

Cone

Uneven

Thickness

Bar

Smooth

Even Length

Bar

Copper pipe

Clamp handle

Inside is shiny with no scratches

Slanted

Pipe Size (in. O.D.) Outside Diameter (mm) “A” Dimension (mm [in.])

1/4 6.35 ~ 9.1 (11/32 - 23/64)

3/8 9.52 ~ 13.2 (1/2 - 33/64)

1/2 12.7 ~ 16.6 (41/64 - 21/32)

5/8 15.88 ~ 19.7 (49/64 - 25/32)

3/4 19.05 ─

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 41

REFRIGERANT PIPING

Tightening Flare Nuts

1. When connecting the are nuts, coat the are (inside and outside) with polyvinyl ether (PVE) refrigeration oil only.

Note:

• Do not use polyolyester (POE) or any other type of mineral oil as a lubricant. These lubricants are not compatible with PVE oil used in this system and create oil sludge leading to equipment damage and system malfunction..

2. Initially hand tighten the are nuts using three (3) or four (4) turns.

3. To nish tightening the are nuts, use both a torque wrench and a backup wrench.

4. After all the piping has been connected and the caps have been tightened, check for refrigerant gas leaks

Loosening Flare Nuts

Always use two (2) wrenches to loosen flare nuts.

Pipe Size (in. O.D.) Outside Diameter (mm) Tightening Torque (ft-lbs.)

1/4 6.35 13.0 - 18.0

3/8 9.52 24.6 - 30.4

1/2 12.7 39.8 - 47.7

5/8 15.88 45.4 - 59.3

3/4 19.05 71.5 - 87.5

Keep Pipes Capped While Storing.

Piping Materials and Handling

Pipes used for the refrigerant piping system must include the specified thickness, and the interior must be clean. While handling and storing, do not bend or damage the pipes, and take care not to contaminate the interior with dust, moisture, etc. Keep refrigerant pipe dry, clean, and airtight.

Installation Manual

Possible Problems

Solutions

Clean Airtight

No moisture should be inside the piping. No dust should be inside the piping. No leaks should occur.

Moisture

- Significant hydrolysis of refrigerant oil.

- Refrigerant oil degradation.

- Poor insulation of the compressor.

- System does not operate properly.

- EEVs, capillary tubes are clogged.

- Remove moisture from the piping.

- Piping ends should remain capped until connections are complete.

- Do not install piping on a rainy day.

- Connect piping properly at the unit’s side.

- Remove caps only after the piping is cut, the burrs are removed, and after passing the piping through the walls.

- Evacuate system to a minimum of 500 microns and insure the vacuum holds at that level for 24 hours

Due to our policy of continuous product innovation, some specifications may change without notification.

- Refrigerant oil degradation.

- Poor insulation of the compressor.

- System does not operate properly.

- EEVs and capillary tubes become clogged.

- Remove dust from the piping.

- Piping ends should remain capped until connections are complete.

- Connect piping properly at the side of the unit.

- Remove caps only after the piping is cut and burrs are removed.

- Retain the cap on the piping when passing it through walls, etc.

Dust

Leaks

- Refrigerant gas leaks/shortages.

- Refrigerant oil degradation.

- Poor insulation of the compressor.

- System does not operate properly.

- Test system for air tightness.

- Perform brazing procedures that comply with all applicable standards.

- Perform flaring procedures that comply with all applicable standards.

- Perform flanging procedures that comply with all applicable standards.

- Ensure that refrigerant lines are pressure tested to 550 psig.

Page 42

REFRIGERANT PIPING

WARNING

Refrigerant Safety

Verify the maximum refrigerant concentration level in the space where the indoor unit will be mounted meets the concentration limit for the application. There is risk of asphyxiation from oxygen depletion.

Information about ASHRAE Standard 15-2010/34-2010 and addenda current as of the date of this publication.

Brazing

Note:

It is imperative to keep the piping system free of contaminants and debris such as copper burrs, slag, or carbon dust during installation.

1. All joints are brazed in the field. Multi V IV refrigeration system components contain very small capillary tubes, small orifices, electronic

expansion valves, oil separators, and heat exchangers that can easily become blocked. Proper system operation depends on the installer using best practices and utmost care while assembling the piping system.

• Store pipe stock in a dry place and keep stored pipe capped and clean.

• Purge all pipe sections clean with dry nitrogen prior to assembly.

2. Proper system operation depends on the installer using best practices and the utmost care while assembling the piping system.

• Use adapters to assemble different sizes of pipe.

• Always use a non-oxidizing material for brazing. Do not use ux, soft solder, or anti-oxidant agents. If the proper material is not used,

Multi V Ducted Indoor Units

oxidized lm may accumulate and clog or damage the compressors. Flux can harm the copper piping or refrigerant oil.

• Use a tubing cutter; do not use a saw to cut pipe. De-bur and clean all cuts before assembly.

3. Brazing joints:

• Use a dry nitrogen purge operating at a minimum pressure of three (3) psig and maintain a steady ow.

• Use a 15% silver phosphorous copper brazing alloy to avoid overheating and produce good ow.

• Protect isolation valves, electronic expansion valves, and other heat-sensitive control components from excessive heat with a wet rag or heat barrier spray.

Figure 21: Using Nitrogen Gas During Brazing

Refrigerant Pipe

Regulator

Welding Point

Nitrogen gas

3.0 psi or less

Do not block outlet side. When pressure inside pipe is above atmospheric pressure, pinhole leaks can occur.

Due to our policy of continuous product innovation, some specifications may change without notification.

Tape

(no air bubbles)

Auxiliary Valve

Nitrogen

Gas

Tank

Page 43

REFRIGERANT PIPING

A + B ~ 12" – 19"

No Clearance

Overlap Insulation Where the Port and the Piping Meet

Insulation for Indoor Unit Port (Field Supplied)

Insulation for Refrigerant Piping (Field Supplied)

Insulation Clip (Field Supplied)

A properly installed pipe system will have sufficient support so that pipes will not sag during the life of the system. As necessary, place supports closer for segments where potential sagging could occur. Maximum spacing of pipe supports must meet local codes.

Figure 22: Pipe Support at Indoor Unit. Figure 23: Typical Pipe Support Location—Change in Pipe Direction.

Max. 12"

~ 12" – 19"

Refrigerant Pipe Connections

Indoor units come with flare type connections. It is the installer’s option to use the flare fittings provided or braze the indoor unit to the refrigerant piping system.

Flare Fittings

• All unit are ttings are 45° and rate for high-pressure R410A refrigerant.

• Properly form all are ttings using best practices.

• Place a drop of PVE oil on the outside of the are tting before tightening.

Figure 24: Typical Refrigerant Line Flare Fitting Insulation Detail

Installation Manual

Note:

• Do not use any other type of oil (including traditional POE refrigeration oil) as a lubricant. Failure to follow this procedure may lead to restrictions in the refrigeration components.

• Do not over-tighten flare nuts. Excessive tightening will cause fittings to crack.

Note:

Multi V refrigeration system components contain very small capillary tubes, small orices, electronic expansion valves, oil separators, and heat exchangers that can easily become blocked.

Insulate Refrigerant Pipes

Sufficiently insulate all cold surfaces to prevent moisture forming. All pipes must be insulated and each pipe must be separately wrapped. Refer to Figure 24 and Figure 25. Use field-provided one-half (1/2) inch thick (or thicker) closed-cell insulation. The thickness may need to be increased based on ambient conditions and local codes.

Wrap all refrigerant and condensate piping including field-provided isolation ball valves and flexible pipe connection kits provided by LG. Glue all insulation joints with no air gaps between insulation segments, and between insulation segments and the unit case. Ensure insulation material fits snugly against the refrigeration pipe with no air space between the pipe surface and the surrounding insulation.

Figure 25: No Air Gap in Pipe Insulation to Indoor Unit Frame.

Protect insulation inside hangers and supports with a second insulation layer. Ensure insulation on all pipe passing through pipe hangers, inside conduit, and/or sleeves is not compressed.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 44

CONDENSATE PIPING

1/50~1/100 slope

Hanger distance

3.3~4.9 feet Hanger Bracket

Flexible drain hose

Insulation

Metal clamp

Max.

11-13/16 inches

PVC Piping

PVC Elbow

Drain pump

All ducted indoor units except the vertical air handler have a factorymounted condensate pump that runs continuously while the unit is in cooling mode. The pump has an internal high-level float switch that stops the unit if the water level in the pan rises too high.

All ducted indoor units have a flexible drain hose kit and one or two clamps. The hose can be used to connect the condensate pipe to the condensate pump connection. On high-static units, there is the option to directly connect a one (1) inch FPT fitting to the drain pan’s gravity drain connection.

B3, B4 Frame Built In Ducted

NJ, NK Frame Vertical/Horizontal

Table 18: Indoor Unit Drainage Specications.

Indoor Unit Drain Type

BH, BG, BR, B8 Frame

High Static Ducted

Low Static Ducted

Air Handler Unit

27 in. Lift

Drain Pump,

Factory Installed

Gravity Ø1

Drain Pipe Dia.

(ID, in.)

Ø1L1, L2, L3 Frame

Note:

When making condensate pipe connections, be careful not to exert lateral force on the drain nipple. Internal damage

may occur. Refer to Table 17 for condensate pipe connection sizes.

Condensate Pump Connection

All ducted units have a condensate pump except the vertical air handler unit. Note the following when connecting the condensate pipe to the unit.

• Indoor units DO NOT come with check valves or a backow prevention device. If check valves are needed, they must be eld supplied.

• The maximum lift of all condensate pumps is 27 in.-wg.

• Measure lift distance from the bottom surface of the indoor unit, NOT from the condensate pipe connection.

• Slope all horizontal condensate pipe segments a minimum of 1/4 inch per foot away from the indoor unit.

Ducted Unit Drain Information

When the bottom surface of the indoor unit is at an elevation below the receiving building drain line connection, install an inverted trap at the top of the condensate pump discharge riser before connection to the building drain pipe.

Figure 26: High Static, Low Static, Built In Ducted Indoor Unit Drain

Pump to Drain Piping System

When the receiving drain line is mounted horizontal, connect the inverted trap to the top half of the pipe. The connection point of the inverted trap to the building drain pipe should always be to the top half of the pipe and should never be over 45° either side of the upper

Multi V Ducted Indoor Units

most point of the horizontal building drain line.

If connecting to a vertical drain line or plumbing system vent line, connect the IDU condensate pump discharge line using a Y-45 fitting with the double end of the Y-45 fitting facing up. When connecting to a vertical drain line include an inverted trap at the top of the IDU condensate pump discharge riser before connection to the Y-45 fitting.

Gravity Condensate Pipe Connection

High-static indoor units (BH/BG/BR/B8) have an auxiliary gravity condensate drain connection just below the condensate pump pipe connection on the control panel end of the unit. This connection may be used instead of using the condensate pump.

• Verify the unit is installed with a slight cant toward the gravity drain connection.

• Remove the rubber plug before connecting the condensate line to the indoor unit.

• The gravity condensate line must be equipped with a conden-

sate trap for proper condensate ow. Refer to Figure 26 for trap

details.

• All horizontal segments of condensate pipe should be sloped a minimum of 1/4 inch per foot away from the indoor unit.

• Use materials acceptable by local code.

Due to our policy of continuous product innovation, some specifications may change without notification.

Figure 27: Gravity Condensate Trap..

U-Trap

Where:

A = 2-1/2"

B ≥ 2 x C

C ≤ 2 x External Static Pressure (in.-wg)

Page 45

CONDENSATE PIPING

(

)

(

)

U-Trap

A ≥

2-9/16 inch B ≥ 2C C ≥ 2 x SP

SP = External Pressure

(in. WG)

Ex) External Pressure

= 0.4 in. WG A ≥ 2-9/16 inches B ≥ 1-7/12 inches C ≥ 13/16 inches

Applied U-Trap Dimensions

• Install the U-Trap to prevent leaks caused by blocking the intake air filter.

3/4 inch

connector

Insulation Requir ed

Insulation Not Required

Properly Fitting Insulation

Vertical/Horizontal Air Handler Unit Drain Information

Note:

Install a eld-supplied external condensate pan underneath the entire vertical air handler unit to avoid damage due to condensate overow.

Vertical / Horizontal Air Handler units have a gravity drain.

• Avoid blocking lter access panel when connecting drain lines.

• An additional external condensate line should run from the unit into the pan.

• The entire condensate line should be drained from the external condensate pan.

• Point the drain hose downward for easy drain ow.

Do not use pipe joint connection or PVC/CPVC for the unit

•

drain line connection. Use Teon® tape.

Install the Condensation Drain Pipe

• Drain piping must slope down or ow may reverse back to unit.

• During drain piping connection, be careful not to exert extra force on the drain port on the indoor unit.

• Refer to Table 17 for drain pipe sizing.

• Use polyvinyl chloride pipe.

• Install insulation on the drain piping.

• Use polyethylene foam greater than 5/16 inch thick for insulation.

1. Refer to Figure 30 and plan the drain pipe routing so that the pipe will slope downward from the indoor unit to its end drain location.

Figure 30: Drain Piping Slope.

Figure 28: Vertical / Horizontal Air Handler Unit Drain Piping System.

Figure 29: Vertical / Horizontal Air Handler Unit U-Trap Specications.

Installation Manual

Pipe clamp

Upward routing not allowed

Indoor unit

Maintenance drain port

2. Connect the provided flexible drain pipe to the main drain pipe.

3. Pour water into the flexible pipe as shown in Figure 33 to test for leaks. Repair leaks if necessary.

4. Route the flexible drain pipe to the indoor unit and connect the flexible drain pipe to the drain port of the indoor unit.

5. Install field-supplied thermal insulation on the flexible drain pipe and position snugly against indoor unit.

Figure 32: Do Not Sharply Bend Drain Pipe.

Flexible drain hose

Due to our policy of continuous product innovation, some specifications may change without notification.

Figure 31: Properly Insulating the Drainage Piping.

Figure 33: Testing the Drain Pipe.

Pour water to test for proper drainage and no leaks

Drain Pump

Drain pan

Flexible drain hose

Main drain pipe

Drain port

Glue the joint

Drain hose clip (provided)

Page 46

POWER AND CONTROL WIRING

DANGER

WARNING

Overview

Connecting Power and Control Wiring

Indoor unit installation best practices are to connect control wiring (low voltage) and then connect power wiring (high voltage). Do not apply power to the indoor unit or any Multi V system component until authorized to do so by the system commissioning agent.

High voltage electricity is required to operate this system. Adhere to the National Electrical Codes and these instructions when wiring.

Improper connections and inadequate grounding can cause accidental injury or death.

Always ground the unit following local, state, and National Electrical Codes.

Improper connections and inadequate grounding can cause accidental injury or death.

Properly size all circuit breakers or fuses.

There is risk of re, electric shock, explosion, physical injury or death.

The information contained in this manual is intended for use by a trained electrician familiar with applicable local codes and the U.S. National Electric Code (NEC), and who is equipped with the proper tools and test instruments.

Failure to carefully read and follow all instructions in this manual can result in personal injury or death.

Connect the indoor unit input power cable but do not apply power to the indoor unit until authorized to do so by the system commissioning agent.

Inappropriate power connection can result in personal injury or death.

Ensure the unit is connected to a dedicated power source that provides adequate power.

If the power source capacity is inadequate or the electric work is not performed properly, it may result in re, electric shock, physical injury or death.

Refer to local, state, and federal codes, and use power wires of sufcient current capacity and rating.

Wires that are too small may generate heat and cause a re, resulting in physical injury or death.

Multi V Ducted Indoor Units

Secure all eld wiring connections with appropriate wire strain relief.

Improperly securing wires will create undue stress on equipment power lugs. Inadequate connections may generate heat, cause a re and physical injury or death.

Properly tighten all power connections.

Loose wiring may overheat at connection points, causing a re, physical injury or death.

Note:

Connect the indoor unit input power cable but do not apply power to the indoor unit until authorized to do so by the system commissioning agent.

Inappropriate power connection can result in equipment damage and will void the LG limited liability warranty.

Do not cut, lengthen or shorten the communications and power cable between a zone controller or dry contact unit and its connected indoor unit. Do not install the zone controller or dry contact unit in a location where the communications and power cable cannot be safely and easily connected between the two units. Do not allow strain on this cable.

Poor cable connections can cause equipment malfunction.

The information contained in this manual is intended for use by an industry-qualied, experienced, trained

electrician familiar with applicable local codes and the U.S. National Electric Code (NEC), and who is equipped with the proper tools and test instruments.

Failure to carefully read and follow all instructions in this manual can result in equipment malfunction or property damage and will void the LG limited liability warranty.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 47

Indoor Unit Communication Cable Connections

Note:

Failure to follow any of these power and communications wiring guidelines or instructions will likely cause communications errors and unit malfunction.

Polarity matters. When connecting the communications cable conductors at each Multi V system component, be careful the conductor connected to the IDU(A) terminal on the outdoor unit is connected to the A/3(A) terminal at each indoor unit. The conductor connected to the IDU(B) terminal on the outdoor unit must be connected to the B/4(B) terminals at each indoor unit. Cross connecting the A/3(A) and B/4(B) terminals will cause communications errors and system malfunction.

Note:

The minimum distance required between power wires and the communications cable is voltage/amperage dependent and in cases where either are relatively high the minimum distance may be more than two (2) inches. Refer to the appropriate LG Multi V Outdoor Unit Engineering Manual on www.lg-vrf.com for detailed

information.

• Keep communications cables away from line voltage wiring, lighting ballasts, and other devices emitting EMF energy. Maintain a minimum of two (2) inches between line voltage wires and communications or zone controller cables.

• Field provide a minimum of 18-2 AWG, stranded and shielded, PVC or vinyl jacket communications wiring between the indoor units, heat recovery boxes (if applicable), and outdoor units.

• The outdoor/indoor unit communications cable must be run between components in a daisy chain

conguration. Star or wye congurations are not allowed.

• Refer to the wiring connection diagrams for the appropriate unit (Figure 34 through Figure 40) Connect the communications cables to the A/3(A) and B/4(B) terminals at indoor units and/or heat recovery units. Maintain polarity throughout the communications bus. Be sure A/3(A) terminals are connected to A/3(A) terminals and B/4(B) terminals are connected to B/4(B) terminals.

• Ground the shield of the communications cable at one end only, at the master outdoor unit.

WIRING

Installation Manual

Don’ts

• Never use wire caps and never splice communications cables.

• Star and Wye communications cable congurations are not acceptable.

• Never connect zone controllers or other central control products such as AC Smart, PDI, or LG building management system gateway products to the IDU/ODU communications cable.

Communication Cable Connection

Note:

When connecting the communications bus between the outdoor unit, indoor unit(s), and heat recovery unit(s), it does not matter what physical path or route the wire takes. The installer may use discretion when choosing the order the components are connected to the communications bus, but must maintain the daisy chain and polarity conguration.

1. If not already done so, read Connecting Power and Control Wiring on the previous page.

2. Remove a knock-out plug from the control box. Remember the communications cable and the power cable must enter the control box through different knockouts.

3. Field-install a plastic or rubber grommet in the knockout hole to prevent wire chafng.

4. If using conduit, connect the conduit to the control box using field-provided fittings and industry bestpractice procedures.

5. Provide at least three (3) to four (4) inches of slack cable at each indoor unit.

6. Secure the communications cable to the inside surface of the control box using a field provide nylon wire clamp.

7. Strip approximately half of an inch of insulation from each communications cable conductor. At each indoor unit, insert the conductors under the terminal screw.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 48

WIRING

Lock nut

Conduit mounting plate

Conduit

L(L1)N(L2)

A B

Power Supply

High Voltage

(208/230V)

Communications

BG, BR, B8 Frame Terminals

Indoor Unit Terminal Block

L(L1) N(L2)

A------ABB

GND 12V

DRY2DRY1

INTERNETIDUSODU

Outdoor Unit Terminal Block

Power Input 208-230V /

60 Hz / 1 Phase

Ground

YL RD

A B

Wired Controller

Outdoor Unit Terminal Block

Indoor Unit Communications Cable Connections

8. Securely tighten the terminal screws to prevent the communications conductors from coming loose from the terminal block.

9. Secure the communications cable in appropriate locations outside the indoor unit to prevent damage to the cable or injury to maintenance personnel.

Figure 34: Location of Power Wiring and Communications Cable Terminals in the High Static

and Low Static Ducted Indoor Units

Multi V Ducted Indoor Units

Indoor Unit Terminal Block

L(L1) N(L2)

Ground

Power Input

208-230V /

60 Hz / 1 Phase

Figure 35: Terminal Block in the High Static (BH, BG, BR, B8 Frame) Ducted Indoor Units

Figure 36: Terminal Block in the Low Static (L1, L2, L2 Frame) Ducted Indoor Units

INTERNETIDUSODU

3(A) 4(B)

Due to our policy of continuous product innovation, some specifications may change without notification.

A------ABB

DRY2DRY1

GND 12V

Page 49

WIRING

Power Wiring Through Optional Access Hole

Communication Cable Through Optional Access Hole

3(A) 4(B)

Indoor Unit Terminal Block

Power Input

208-230V /

60 Hz / 1 Phase

Ground

L(L1)N(L2)

A------ABB

GND12V

DRY2DRY1

INTERNETIDUSODU

Outdoor Unit Terminal Block

Lock nut

Conduit

Power Supply

High Voltage

(208/230V)

Communications

3(A) 4(B)

L(L1)N(L2)

YL RD BK

B3, B4 Frame Terminals

Indoor Unit Terminal Block

A------ABB

GND 12V

DRY2DRY1

INTERNETIDUSODU

Outdoor Unit Terminal Block

YL RD

A B

Wired Controller

L(L1) N(L2)

Power Input 208-230V /

60 Hz / 1 Phase

Ground

Indoor Unit Communication Cable Connections

Figure 37: Location of Power Wiring and Communications Cable Terminals in the Built In Ducted Indoor Unit

Figure 38: Terminal Block in the Built In Ducted Indoor Units

Installation Manual

Figure 39: Location of Power Wiring and Communications Cable Terminals

in the Vertical/Horizontal Air Handler Unit

Figure 40: Terminal Block in the Vertical / Horizontal Air Handler Units

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 50

WIRING

DANGER

WARNING

Indoor Unit Power Cable Connections

Connecting Power and Control Wiring

High voltage electricity is required to operate this system. Adhere to the National Electrical Codes and these instructions when wiring.

Improper connections and inadequate grounding can cause accidental injury or death.

Always ground the unit following local, state, and National Electrical Codes.

Improper connections and inadequate grounding can cause accidental injury or death.

Properly size all circuit breakers or fuses.

There is risk of re, electric shock, explosion, physical injury or death.

Failure to carefully read and follow all instructions in this manual can result in personal injury or death.

Connect the indoor unit input power cable but do not apply power to the indoor unit until authorized to do so by the system commissioning agent.

Inappropriate power connection can result in personal injury or death.

Ensure the unit is connected to a dedicated power source that provides adequate power.

If the power source capacity is inadequate or the electric work is not performed properly, it may result in re, electric shock, physical injury or death.

Refer to local, state, and federal codes, and use power wires of sufcient current capacity

and rating.

Multi V Ducted Indoor Units

Wires that are too small may generate heat and cause a re.

Secure all eld wiring connections with appropriate wire strain relief.

Improperly securing wires will create undue stress on equipment power lugs. Inadequate connections may generate heat, cause a re and physical injury or death.

Properly tighten all power connections.

Loose wiring may overheat at connection points, causing a re, physical injury or death.

Note:

Connect the indoor unit input power cable but do not apply power to the indoor unit until authorized to do so by the system commissioning agent.

Inappropriate power connection can result in equipment damage and will void the LG limited liability warranty.

Failure to carefully read and follow all instructions in this manual can result in equipment malfunction or property damage and will void the LG limited liability warranty.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 51

WIRING

Indoor Unit Power Cable Connections

Read and understand all power-related DANGER and WARNING statements in this manual before working with power cables. Ensure the power source is disconnected from the indoor unit’s power input cable before connecting the cable.

Improper connections and inadequate grounding can cause accidental injury or death.

Note:

Keep line voltage power away from the communications terminals. Line voltage power applied to the communications terminals will damage the indoor unit control board and it will have to be replaced. Maintain a minimum of two (2) inches between line voltage wires and communications or zone controller cables.

Size all eld provided electrical components per NEC and local code. Always use copper wire.

Power Wiring Instructions

1. If not already done so, read Connecting Power and Control Wiring on page 50.

2. Provide clean 208/60/1 power to the unit. Maximum acceptable power fluctuation range is 188 volts to 253 volts.

3. To access the power and communications terminal block on high-static ducted units (BH/BG/BR/B8) and low-static built-in units (B3/B4), remove the control box cover.

4. To access the power and communications terminal block on low-static ducted units (L1/L2/L3), the terminal block is behind the end panel of the case. Refer to Figure 19.

5. Remove a knock-out plug from the control box. Do not use the same knock-out as the communications and zone controller cables.

6. To prevent wire chafing, install a field-supplied plastic or rubber grommet in the hole just created by removing the knock-out plug.

7. If using conduit, follow industry best practice procedures to connect the conduit to the control box using field-provided fittings.

8. Provide enough slack wire at each indoor unit to connect to the terminal block without tension on the wire. Route the wire through the conduit (if used) and into the control box. Be sure to keep a minimum of two (2) inches of spacing between the power wiring and the communications wiring.

9. Secure power wiring to the inside surface of the control box using a field-provided nylon wire clamp.

10. If needed, secure the power wiring in appropriate locations outside the indoor unit to prevent damage to the wire or injury to maintenance personnel.

11. Strip approximately half (1/2) of an inch of insulation from each of the power wire conductors. Tightly crimp a spade connector to the Hot, Neutral and Ground Wires. Insert the spade connector under the appropriate terminal block screw and tighten. Refer to Figure 34 through Figure 40 for details of the terminal block wiring of the unit being installed.

12. Securely tighten the terminal screws to prevent the conductors from coming loose.

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 52

WIRING

ODU/WSU DIP Switch No. 3

DIP Switch Settings for Gen4 Equipment

Generation 4 Equipment

The latest versions of LG’s indoor units and outdoor (air/water source) units are designated Generation 4 (Gen 4). For Gen 4 units to operate with Gen 4 features, the air conditioning system must meet the following requirements:

• All indoor units, heat recovery units, and air/water source units

must be Gen 4.

• All air/water source units must have Gen 4 software

installed.

• Air/water source units DIP switch 3 must be set to ON

(factory default setting is OFF).

• All controllers must support Gen 4 features.

Figure 41 shows the ODU DIP switch. Table 19 lists how combining different components will affect system operation. Table 20 lists the serial numbers of air and water source units that have Gen 4 software. All air and water source units, indoor units, heat recovery units, and controllers in a system must be Gen 4 compatible or the system will not operate with Gen 4 features.

Table 19: System Component Combinations and Operation Status

Air / Water

Source Units*

Indoor Unit(s)**

Heat Recovery

Unit(s)

Gen 4 Gen 4 ONLY Model 2A ONLY Must be ON System will operate WITH Gen. 4 features.

Multi V Ducted Indoor Units

Gen 4 Gen 4 ONLY Model 2A ONLY OFF System will operate but WITHOUT Gen. 4 features.

Gen 4 Gen 4 ONLY

Gen 4

Gen 2

Any combination of

Gen 2 and Gen 4

Any combination of

Gen 2 and Gen 4

Any combination of

Gen 2 and Gen 4

Any combination of

Models 1A, 2A

Model 2A ONLY

Any combination of

Models 1A, 2A

Any combination of

Models 0A****, 1A, 2A

Figure 41: Location and Setting of ODU DIP Switch 3

OFF

1 2 76543

Outdoor Unit DIP

Switch No. 3

Must be OFF

(factory default)

Must be OFF

(factory default)

Must be OFF

Does NOT include Gen. 4 features. System will not operate if DIP Switch No. 3 is ON, and an error code will be generated.

(factory default)

N/A*** Does not include Gen. 4 features.

OFF

1 2 76543

Operation Status

*Gen 4 Air/Water Source Units = Multi V IV or Multi V Water IV with Gen 4 software (see table below for Gen 4 serial numbers) or Multi V S. Gen 2 Air/Water Source Units = Multi V II, Multi V III, Multi V IV without Gen. 4 software, Multi V Water II, Multi V Water IV without Gen. 4 software, Multi V Mini, Multi V Water Mini, or Multi V Space II.

**Gen 4 Indoor Units model numbers end in “4”; Gen 2 Indoor Units model numbers end in “2” or an “A”, including Hydro Kit.

***DIP Switch No. 3 on Gen 2 air/water source units is not related to Gen 4 features as it is with Gen 4 air/water source units.

****0A Model Heat Recovery units are not for use with Multi V IV, Multi V Water IV, or Multi V III heat recovery systems.

Table 20: Serial Numbers of Air/Water Source Units with Gen 4 Software

Air/Water Source Unit

Model Type

Multi V IV Air Source

Heat Pump

Multi V Air Source

Heat Recovery

Multi V IV Water Source

Heat Pump

Multi V IV Water Source

Heat Recovery

Serial Number of Air/Water

Source Units with

502********* and Higher 503********* and Higher 504********* and Higher

Gen 4 Software

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 53

High-Static Ducted BH Chassis

Figure 42: High-Static Ducted BH Chassis Wiring Diagram

WIRING

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 54

WIRING

High-Static Ducted BH Chassis

Table 21: High-Static Ducted BH Chassis Wiring Diagram

CONNECTOR PURPOSE FUNCTION

CN-POWER

CN-MOTOR1

CN-DAMPER

CN-ZONE

CN-EXT

CN-EEV

CN-OPTION

CN-DISPLAY

CN-PTC

CN-CC

CN-HUMID

CN-LEAK

CN-FLOAT

CN-PIPE/OUT

CN-WF

CN-AIRC

CN-PIPE/IN

CN-ROOM

CN-REMO

CN-D/PUMP

Multi V Ducted Indoor Units

CN-485

AC Power supply AC Power line

Fan motor output Motor output of BLDC

N / A N / A

Zone controller Zone controller connection

External on / off controller External on / off Controller connection

EEV Output EEV control output

Optional PCB EPROM Option PCB connection

Display Display of indoor status

Auxiliary heater Connection for Auxiliary Heater

Dry contact Dry Contact connection

N / A N / A

Leak detector Leak detector connection

Float switch input Float switch sensing

Discharge pipe sensor Pipe out thermistor

N / A N / A

Suction pipe sensor Pipe in thermistor

Room sensor Room air thermistor

Wired remote controller Wired remote control connection

Drain pump output AC output for drain pump

Communication Connection between indoor and outdoor units

Table 22: BH Chassis DIP Switch Settings

DIP Switch Setting Off On Remarks

SW3

GROUP CONTROL Master Slave

SW4

SW5

*For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

DRY CONTACT

MODE

CONTINUOUS FAN Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

1. On: Indoor unit fan will always operate at a set fan speed, except when the system is off, or the outdoor unit is in defrost mode (when the oudoor unit is in defrost mode, the fan will operate at super low fan speed)

2. Off: Indoor unit fan speed can be changed by on / off

Page 55

WIRING

High-Static Ducted BG Chassis

Optional Connections

Figure 43 shows the control board for the BG chassis. Connect optional equipment to the control board as required for your system.

Figure 43: High-Static Ducted BG Chassis Wiring Diagram

Installation Manual

BG-MEZ61897818

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 56

WIRING

High-Static Ducted BG Chassis

Table 23: High-Static Ducted BG Chassis Wiring Diagram

CONNECTOR PURPOSE FUNCTION

CN-POWER

CN-MOTOR1

CN-VM

CN-DAMPER

CN-ZONE

CN-EXT

CN-EEV

CN-OPTION

CN-DISPLAY

CN-PTC

CN-CC

CN-HUMID

CN-LEAK

CN-FLOAT

CN-PIPE/OUT

CN-WF

CN-AIRC

CN-PIPE/IN

CN-ROOM

CN-REMO

Multi V Ducted Indoor Units

CN-D/PUMP

CN-485

AC Power supply AC Power line

Fan motor output Motor output of BLDC

Sub PCB to Main PCB power supply Power supply connection

N / A N / A

Zone controller Zone controller connection

External on / off controller External on / off Controller connection

EEV Output EEV control output

Optional PCB EPROM Option PCB connection

Display Display of indoor status

Auxiliary heater Connection for Auxiliary Heater

Dry contact Dry Contact connection

N / A N / A

Leak detector Leak detector connection

Float switch input Float switch sensing

Discharge pipe sensor Pipe out thermistor

N / A N / A

Suction pipe sensor Pipe in thermistor

Room sensor Room air thermistor

Wired remote controller Wired remote control connection

Drain pump output AC output for drain pump

Communication Connection between indoor and outdoor units

Table 24: BG Chassis DIP Switch Settings.

DIP Switch Setting Off On Remarks

SW3

GROUP CONTROL Master Slave

SW4

SW5

*For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

DRY CONTACT

MODE

CONTINUOUS FAN Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

2. Off: Indoor unit fan speed can be changed by on / off

Page 57

WIRING

High-Static Ducted BR Chassis

Optional Connections

Figure 44 shows the control board for the BR chassis. Connect optional equipment to the control board as required for your system.

Figure 44: High-Static Ducted BR Chassis Wiring Diagram

Installation Manual

BR-MEZ66590610

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 58

WIRING

High-Static Ducted BR Chassis

Table 25: High-Static Ducted BR Chassis Wiring Diagram

CONNECTOR PURPOSE FUNCTION

CN-POWER

CN-MOTOR1

CN-MOTOR2

CN-VM

CN-DAMPER

CN-ZONE

CN-EXT

CN-EEV

CN-OPTION

CN-DISPLAY

CN-PTC

CN-CC

CN-LEAK

CN-FLOAT

CN-PIPE/OUT

CN-WF

CN-HUMID

CN-AIRC

CN-PIPE/IN

CN-ROOM

Multi V Ducted Indoor Units

CN-REMO

CN-D/PUMP

CN-485

AC Power supply AC Power line

Fan motor output Motor output of BLDC

Sub PCB to Main PCB power supply Power supply connection

N / A N / A

Zone controller Zone controller connection

External on / off controller External on / off Controller connection

EEV Output EEV control output

Optional PCB EPROM Option PCB connection

Display Display of indoor status

Auxiliary heater Connection for Auxiliary Heater

Dry contact Dry Contact connection

Leak detector Leak detector connection

Float switch input Float switch sensing

Discharge pipe sensor Pipe out thermistor

N / A N / A

Suction pipe sensor Pipe in thermistor

Room sensor Room air thermistor

Wired remote controller Wired remote control connection

Drain pump output AC output for drain pump

Communication Connection between indoor and outdoor units

Table 26: BR Chassis DIP Switch Settings.

DIP Switch Setting Off On Remarks

SW3

GROUP CONTROL Master Slave

SW4

SW5

*For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

DRY CONTACT

MODE

CONTINUOUS FAN Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master /

Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

2. Off: Indoor unit fan speed can be changed by on / off

Page 59

WIRING

High-Static Ducted B8 Chassis

Optional Connections

Figure 45 shows the control board for the B8 chassis. Connect optional equipment to the control board as required for your system.

Figure 45: High-Static Ducted B8 Chassis Wiring Diagram

Installation Manual

B8-MEZ66590612

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 60

WIRING

High-Static Ducted B8 Chassis

Table 27: High-Static Ducted B8 Chassis Wiring Diagram

CONNECTOR PURPOSE FUNCTION

CN-POWER

CN-MOTOR1

CN-MOTOR2

CN-VM

CN-DAMPER

CN-ZONE

CN-EXT

CN-EEV

CN-OPTION

CN-DISPLAY

CN-PTC

CN-CC

CN-LEAK

CN-FLOAT

CN-PIPE/OUT

CN-WF

CN-HUMID

CN-AIRC

CN-PIPE/IN

CN-ROOM

Multi V Ducted Indoor Units

CN-REMO

CN-D/PUMP

CN-485

AC Power supply AC Power line

Fan motor output Motor output of BLDC

Sub PCB to Main PCB power supply Power supply connection

N / A N / A

Zone controller Zone controller connection

External on / off controller External on / off Controller connection

EEV Output EEV control output

Optional PCB EPROM Option PCB connection

Display Display of indoor status

Auxiliary heater Connection for Auxiliary Heater

Dry contact Dry Contact connection

Leak detector Leak detector connection

Float switch input Float switch sensing

Discharge pipe sensor Pipe out thermistor

N / A N / A

Suction pipe sensor Pipe in thermistor

Room sensor Room air thermistor

Wired remote controller Wired remote control connection

Drain pump output AC output for drain pump

Communication Connection between indoor and outdoor units

Table 28: B8 Unit DIP Switch Settings.

DIP Switch Setting Off On Remarks

SW3

GROUP CONTROL Master Slave

SW4

SW5

*For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

DRY CONTACT

MODE

CONTINUOUS FAN Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master /

Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

2. Off: Indoor unit fan speed can be changed by on / off

Page 61

WIRING

Low-Static Ducted L1 Chassis

Optional Connections

Figure 46 shows the control board for the L1 chassis. Connect optional equipment to the control board as required for your system.

Figure 46: Low-Static Ducted L1 Chassis Wiring Diagram

Installation Manual

L1-MEZ66590602

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 62

WIRING

Low-Static Ducted L1 Chassis

Table 29: Low-Static Ducted L1 Chassis Wiring Diagram

CONNECTOR PURPOSE FUNCTION

CN-POWER

CN-MOTOR1

CN-DAMPER

CN-ZONE

CN-EXT

CN-EEV

CN-OPTION

CN-DISPLAY

CN-PTC

CN-CC

CN-AIRC

CN-LEAK

CN-WF

CN-HUMID

CN-FLOAT

CN-PIPE/OUT

CN-PIPE/IN

CN-ROOM

CN-REMO

CN-D/PUMP

Multi V Ducted Indoor Units

CN-485

AC Power supply AC Power line

Fan motor output Motor output of BLDC

N / A N / A

Zone controller Zone controller connection

External on / off controller External on / off Controller connection

EEV Output EEV control output

Optional PCB EPROM Option PCB connection

Display Display of indoor status

Auxiliary heater Connection for Auxiliary Heater

Dry contact Dry Contact connection

N / A N / A

Leak detector Leak detector connection

N / A N / A

Float switch input Float switch sensing

Discharge pipe sensor Pipe out thermistor

Suction pipe sensor Pipe in thermistor

Room sensor Room air thermistor

Wired remote controller Wired remote control connection

Drain pump output AC output for drain pump

Communication Connection between indoor and outdoor units

Table 30: L1 Unit DIP Switch Settings.

DIP Switch Setting Off On Remarks

SW3

GROUP CONTROL Master Slave

SW4

SW5

*For Gen 4 Multi V ducted indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

DRY CONTACT

MODE

CONTINUOUS FAN Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master /

Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

2. Off: Indoor unit fan speed can be changed by on / off

Page 63

WIRING

Low-Static Ducted L2/L3 Chassis

Optional Connections

Figure 47 shows the control board for the L2/L3 chassis. Connect optional equipment to the control board as required for your system.

Figure 47: Low-Static Ducted L2/L3 Chassis Wiring Diagram

Installation Manual

L2L3-MEZ66590604

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 64

WIRING

Low-Static Ducted L2/L3 Chassis

Table 31: Low-Static Ducted L2/L3 Chassis Wiring Diagram

CONNECTOR PURPOSE FUNCTION

CN-POWER

CN-MOTOR1

CN-MOTOR2

CN-DAMPER

CN-ZONE

CN-EXT

CN-EEV

CN-OPTION

CN-DISPLAY

CN-PTC

CN-CC

CN-AIRC

CN-LEAK

CN-WF

CN-HUMID

CN-FLOAT

CN-PIPE/OUT

CN-PIPE/IN

CN-ROOM

CN-REMO

Multi V Ducted Indoor Units

CN-D/PUMP

CN-485

AC Power supply AC Power line

Fan motor output Motor output of BLDC

N / A N / A

Zone controller Zone controller connection

External on / off controller External on / off Controller connection

EEV Output EEV control output

Optional PCB EPROM Option PCB connection

Display Display of indoor status

Auxiliary heater Connection for Auxiliary Heater

Dry contact Dry Contact connection

N / A N / A

Leak detector Leak detector connection

N / A N / A

Float switch input Float switch sensing

Discharge pipe sensor Pipe out thermistor

Suction pipe sensor Pipe in thermistor

Room sensor Room air thermistor

Wired remote controller Wired remote control connection

Drain pump output AC output for drain pump

Communication Connection between indoor and outdoor units

Table 32: L2, L3 Unit DIP Switch Settings.

DIP Switch Setting Off On Remarks

SW3

GROUP CONTROL Master Slave

SW4

SW5

*For Gen 4 Multi V ducted indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

DRY CONTACT

MODE

CONTINUOUS FAN Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master /

Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

2. Off: Indoor unit fan speed can be changed by on / off

Page 65

WIRING

Low-Static Built-In B3/B4 Chassis

Optional Connections

Figure 48 shows the control board for the L1 chassis. Connect optional equipment to the control board as required for your system.

Figure 48: Low-Static Built-In B3/B4 Chassis Wiring Diagram

Installation Manual

B3B4-MEZ51186311

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 66

WIRING

Low-Static Built-In B3/B4 Chassis

Table 33: Low-Static Built-In B3/B4 Chassis Wiring Diagram

CONNECTOR PURPOSE FUNCTION

CN-POWER

CN-MOTOR1

CN-MOTOR2

CN-VM

CN-FLOAT

CN-ZONE

CN-EEV

CN-OPTION

CN-EXT

CN-DISPLAY

CN-CC

CN-PTC

CN-PIPE/OUT

CN-LEAK

CN-PIPE/IN

CN-REMO

CN-ROOM

AC Power supply AC Power line

Fan motor output Motor output of BLDC

Sub PC power supply Power supply connection

Float switch input Float switch sensing

Zone controller Zone controller connection

EEV Output EEV control output

Optional PCB EPROM Option PCB connection

External ON / OFF controller External ON / OFF controller connection

Display Display of indoor status

Dry contact Dry Contact connection

Auxiliary heater Connection for Auxiliary Heater

Discharge pipe sensor Pipe out thermistor

Refrigerant leak detector Refrigerant leak detector connection

Suction pipe sensor Pipe in thermistor

Wired remote controller Wired remote control connection

Room sensor Room air thermistor

CN-D/PUMP

Multi V Ducted Indoor Units

CN-485

Drain pump output AC output for drain pump

Communication Connection between indoor and outdoor units

Table 34: B3, B4 Unit DIP Switch Settings.

DIP Switch Setting Off On Remarks

SW3

SW4

SW5

*For Gen 4 Multi V ducted indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

GROUP CONTROL Master Slave

DRY CONTACT

MODE

CONTINUOUS FAN Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master /

Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

2. Off: Indoor unit fan speed can be changed by on / off

Page 67

WIRING

Vertical Air Handler NJ Chassis

Optional Connections

Figure 49 shows the control board for the NJ chassis. Connect optional equipment to the control board as required for your system.

Figure 49: Vertical Air Handler NJ Chassis Wiring Diagram

Installation Manual

NJ-MEZ62689314

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 68

WIRING

Vertical Air Handler NJ Chassis

Table 35: NJ Frame Wiring Diagram Legend.

Terminal Purpose Function

CN-POWER AC Power supply AC Power line

CN-MOTOR1 Fan motor output Motor output of BLDC

RV-VM Sub PC power supply Power supply connection

CN_OUT Heater Connection for heater

CN-FLOAT Float switch input Float switch sensing

CN-ZONE Zone controller Zone controller connection

CN-EEV EEV Output EEV control output

CN-OPTION Optional PCB EPROM Option PCB connection

CN-EXT

CN-DISPLAY Display Display of indoor status

CN-CC Dry contact Dry Contact connection

CN-PTC

CN-PIPE/OUT (RD) Discharge pipe sensor Pipe out thermistor

CN-LEAK (VI) Refrigerant leak detector Refrigerant leak detector connection

CN-PIPE/IN (WH) Suction pipe sensor Pipe in thermistor

CN-REMO (GN) Wired remote controller Wired remote control connection

CN-ROOM (YL) Room sensor Room air thermistor

CN-D/PUMP Drain pump output AC output for drain pump

CN-485 Communication Connection between indoor and outdoor units

External ON / OFF controller External ON / OFF controller connection

Auxiliary heater Auxiliary heater connection

Multi V Ducted Indoor Units

Table 36: NJ Frame DIP Switch Settings.

DIP Switch Setting Off On Remarks

SW3

GROUP CONTROL Master Slave

SW4

SW5

SW6

*For Gen 4 Multi V vertical air handler indoor units, DIP switches 1, 2, 7 and 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

DRY CONTACT

MODE

CONTINUOUS FAN Off On

HEATER INTERLOCK Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

2. Off: Indoor unit fan speed can be changed by on / off

Selects heater interlock function for vertical air handler units

1. On: Automatic (heater will automatically operate during heating mode)

2. Off: Manual (heater needs to be manually turned on during heating mode)

Page 69

WIRING

Vertical Air Handler NK Chassis

Optional Connections

Figure 49 shows the control board for the NK chassis. Connect optional equipment to the control board as required for your system.

Figure 50: Vertical Air Handler NK Chassis Wiring Diagram

Installation Manual

NK-MEZ62689315

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 70

WIRING

Vertical Air Handler NK Chassis

Table 37: NK Frame Wiring Diagram Legend.

Terminal Purpose Function

CN-POWER AC Power supply AC Power line

CN-MOTOR1 Fan motor output Motor output of BLDC

RV-VM Sub PC power supply Power supply connection

CN_OUT Heater Connection for heater

CN-FLOAT Float switch input Float switch sensing

CN-ZONE Zone controller Zone controller connection

CN-EEV EEV Output EEV control output

CN-OPTION Optional PCB EPROM Option PCB connection

CN-EXT

CN-DISPLAY Display Display of indoor status

CN-CC Dry contact Dry Contact connection

CN-PTC

CN-PIPE/OUT (RD) Discharge pipe sensor Pipe out thermistor

CN-LEAK (VI) Refrigerant leak detector Refrigerant leak detector connection

CN-PIPE/IN (WH) Suction pipe sensor Pipe in thermistor

CN-REMO (GN) Wired remote controller Wired remote control connection

CN-ROOM (YL) Room sensor Room air thermistor

CN-D/PUMP Drain pump output AC output for drain pump

CN-485 Communication Connection between indoor and outdoor units

External ON / OFF controller External ON / OFF controller connection

Auxiliary heater Auxiliary heater connection

Multi V Ducted Indoor Units

Table 38: NK Frame DIP Switch Settings.

DIP Switch Setting Off On Remarks

SW3

GROUP CONTROL Master Slave

SW4

SW5

SW6

*For Gen 4 Multi V vertical air handler indoor units, DIP switches 1, 2, 7 and 8 must be set to OFF. These DIP switches are used for other models.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

DRY CONTACT

MODE

CONTINUOUS FAN Off On

HEATER INTERLOCK Off On

Variable Auto

Due to our policy of continuous product innovation, some specifications may change without notification.

Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units.

2. Off: Indoor unit fan speed can be changed by on / off

Selects heater interlock function for vertical air handler units

1. On: Automatic (heater will automatically operate during heating mode)

2. Off: Manual (heater needs to be manually turned on during heating mode)

Page 71

WIRING

Optional Wall-Mounted Sensor and Controller

Wall-Mounted Sensor Installation

Proper indoor unit operation depends on the location of the room sensor. A good location will protect the zone controller from direct sunlight and external local sources of water vapor, and heated or cooled air. If no mounting height was specified by the building designer, place the handy box approximately fifty-five (55) inches above the finished floor.

• It may be necessary to use a handy box that is sized in metric units, depending on the controller model. Check with your LG representative

to verify which size of handy box is needed for the zone controller in question.

• Use only LG-supplied communications cable. Using eld-supplied cable may result in communications problems between the zone control-

ler and the indoor unit.

• Maintain the minimum distance required between the communications cable and power wiring. The minimum required space between

the two is dependent on the voltage of the power wiring. Refer to the appropriate Multi V Outdoor Unit Engineering Manual for minimum

distance specications.

Do not route power wiring and communications cables in the same conduit.

Do not cut the quick-connect plugs off or adjust the length of the cable. Keep the communications cable away from high voltage wires

and electromagnetic field (EMF) producing equipment.

Wall-Mounted Controller Installation

Since the room temperature sensor is inside the remote controller, the remote controller should be installed in a place away from direct sunlight, high humidity and direct supply of hot or cold air to maintain proper space temperature. Install the remote controller about 5 ft above the floor in an area with good air circulation and an average temperature.

Do not install the remote controller where it can be affected by the following:

• Drafts or dead spots behind doors and in corners

• Hot or cold air from ducts

• Radiant heat from sun or appliances

• Concealed pipes and chimneys

• Uncontrolled areas such as an outside wall behind the remote controller

This remote controller is equipped with a seven segment LED display. For proper display of the remote controller LEDs, the remote controller should be installed properly as shown below. The standard height is 4 - 5 ft from floor level.

1. Pull communications cable between the zone controller handy box (if used) and the indoor unit. The wall-mounted zone controller comes with a thirty (33) foot length of cable.

2. Store a minimal amount of cable in the handy box. Any additional cable should be coiled and stored near the indoor unit control panel.

3. If additional cable length is needed, order a thirty-three (33) foot LG Wired Remote Group Control Extension cable (Model No. PZCWRC1).

4. If the cable between the zone controller and the indoor unit is too long, do not cut the cable and shorten. Coil any spare communications cable, tie-wrap it, and leave it next to the indoor unit location.

Figure 51: Wired Remote Controller Installation

yes

Remote Controller

5ft

TEMP

ote Controller Rem

TEMP

Remote Controller

TEMP

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 72

CONTROLS SETUP

Controlling the Indoor Unit

The method and configuration of controlling the indoor unit will vary according to your system’s requirements.

• It is possible to control up to 16 indoor units with one wired remote controller.

• Set only one indoor unit in a group to master; set the others to slave.

• This indoor unit can be connected in a control group with any other types of LG indoor units.

• It is possible to use a wireless remote controller at the same time as the wall controller.

• It is possible to connect a dry contact and central controller at the same time (to a master indoor unit only).

• A central controller can control all indoor units in a group by controlling the master unit of the group.

• Slave indoor units can not be individually controlled by the central controller.

DIP Switch Settings

Refer to Figure 52. If the indoor unit is a master, set switch 3 of the indoor unit’s DIP switch to Off. If the indoor unit is a slave, set switch 3 of the indoor unit’s DIP switch to On.

Figure 52: Ducted IDU Master/Slave DIP Switch Settings

To Select MASTER:

No. 3: Off

To Select SLAVE:

No. 3: On

Switch Function name Off On Remarks

3 Group Control Master Slave

Multi V Ducted Indoor Units

4 Dry Contact Mode Variable Auto

5 Continuous Fan Off On

DIP Switch Setting Off On Remarks

SW6

HEATER INTERLOCK Off On

Table 39: Ducted IDUs DIP Switch Settings

Group control setting using 7-Day Programmable Controller; selects Master/Slave on each indoor unit

Sets operation mode for optional Dry Contact accessory:

1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting)

2. Auto: For Dry Contact, it is always Auto mode

Selects continuous fan for ducted indoor units:

2. Off: Indoor unit fan speed can be changed by on/off

Table 40: NJ, NK Frame Additional DIP Switch Settings.

Selects heater interlock function for vertical air handler units

1. On: Automatic (heater will automatically operate during heating mode)

2. Off: Manual (heater needs to be manually turned on during heating mode)

*For use with Multi V systems, switches 1, 2, 6, 7, and 8 MUST be set to Off for ducted IDUs.

**To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV Engineering Manual for additional information. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 73

CONTROLS SETUP

Group Control

Figure 53, Figure 54, and Figure 55 show examples of typical control configurations. Figure 53 shows one wired remote controller configured as a Master to control a group of indoor units. Figure 54 shows two wired remote controllers, one configured as a Master and the other as a Slave. Figure 55 shows a system with indoor units and fresh air units configured as two groups, each with a Master wired controller. Configure the fresh air units as one group and the standard indoor units as another group. Figure 56 shows both a correct and an incorrect control configuration for this type of mixed unit system.

Figure 53: Group Control - Method 1

LGAP Network System

LGMV

AC Smart

ACP Bacnet/ACP LON

(Optional)

Other Building

Mgmt System

(Optional)

Dry

Contact

(Optional)

LGMV

Dry

Contact

(Optional)

Master

Display

Error

Message

Slave Slave

▪ Connect Signal and GND lines between slave indoor units ▪ Do not connect 12V line between slave indoor units

Slave

Figure 54: Group Control - Method 2

LGAP Network System

AC Smart

Slave

ACP Bacnet/ACP LON

(Optional)

Slave

Other Building Mgmt System

Installation Manual

GNDSignal12V

(Optional)

Slave

Display

Error

Message

Master

Due to our policy of continuous product innovation, some specifications may change without notification.

▪ Connect Signal and GND lines between slave indoor units

▪ Do not connect 12V line between slave indoor units

Display

Error

Message

Slave

GNDSignal12V

Page 74

CONTROLS SETUP

ZC: Zone Controller

Figure 55: Group Control - Method 3

LGAP Network System

LGMV

Dry

Contact

(Optional)

Multi V Ducted Indoor Units

ACP Bacnet/ACP LON

(Optional)

Master

FAU

Master

Display

Error

Message

AC Smart

FAU

Slave

Display

Error

Message

Figure 56: Control Wiring with Standard IDU and Fresh Air Unit

Other Building

Mgmt System

(Optional)

Slave

▪ Connect Signal and GND lines to slave indoor units

▪ Do not connect 12V line to slave indoor units

GNDSignal12V

Correct Control Wiring Incorrect Control Wiring

FAU FAU StandardStandard

ZC ZC

Due to our policy of continuous product innovation, some specifications may change without notification.

FAU: Fresh Air Intake Unit Standard: Standard Indoor Unit

StandardStandard

Page 75

Remote Control

Figure 57 shows an example of a remote control configuration.

LGAP Network System

LGMV

Dry

Contact

(Optional)

Master

Figure 57: Remote Control

AC Smart

Remote

Sensor

ACP Bacnet/ACP LON

(Optional)

CONTROLS SETUP

Other Building

Mgmt System

(Optional)

Installation Manual

Master

Display

Error

Message

GNDSignal12V

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 76

INSTALLATION CHECKLIST

PAGE 1 of 2

System ID No.: _________________________________________________ Indoor Unit ID.: ____________________________________

Checked by: __________________________________ Date:__________________ Signature: ___________________________________

Rough-In N/A Not Complete Complete

Packing materials and literature removed from fan discharge. Airflow direction correct. Fan wheels spin without obstruction. Unit is properly supported – mounting bolts tight. Unit is level (condensate pump installations). Unit is canted toward gravity drain pan nipple (gravity drain installations only). Recommended minimum service clearances followed. Air filter is clean and properly installed. Does local code require a secondary drain pan under the indoor unit? Is a secondary drain line connected

to the pan?

Ductwork N/A Not Complete Complete

All seams sealed – no air leaks. High-static models only – minimum external static pressure requirements met. Ductwork is properly sized considering the available external static pressure rating of the indoor unit fan. No kinks present in the flexible ductwork. Ductwork is properly supported. Ductwork balancing dampers have been installed and are correctly adjusted or open. Grilles and registers are properly sized and installed.

Refrigerant Piping N/A Not Complete Complete

A dry nitrogen purge rate of three (3) psig was maintained during all brazing activity. PVE refrigerant oil was used as a lubricant on flare fittings (POE type was NOT used). Field formed pipe flares are 45°. Flare fittings were properly tightened. Refrigerant pipe is properly supported to keep lateral pressure off unit connections. Refrigerant shutoff valves are full port design with integral Schrader port rated for R410A (option).

4-Way Cassette Indoor Unit

Shutoff valves have the same internal pipe diameter as the connected pipe (option). Two shutoff valves were installed; one (1) high pressure liquid, one (1) low pressure vapor (option). Shutoff valves installed with Schrader port between the indoor unit and the ball of the valve (option).

Condensate System N/A Not Complete Complete

Condensate pipe is properly sized and supported to keep lateral pressure off unit connections. Condensate pipe horizontal segments are sloped a minimum of 1/4"/100' of pipe away from the indoor unit. Condensate pipe and drain traps were sized using LG recommendations. Field-provided condensate line check valve was installed in the condensate pipe riser (option). Condensate traps were installed on gravity drain pipes (High-Static models only). Condensate line vertical rise between indoor unit bottom and high point of the line does not exceed 27-1/2". Condensate pump power has been disconnected (High-Static indoor unit gravity-drain installations only). Condensate pump riser intersects the building main drain using an inverted trap with connection to the top half

of the drain line with no more of a ±45° of vertical. If required by local code, is a secondary high level condensate shutoff switch present/wired properly (factory

provided internal high level float switch will shut down cooling operation if high water level in the pan is detected)?

Insulation N/A Not Complete Complete

Additional housing, refrigerant and condensate pipe insulation has been supplemented to prevent sweating while operating if indoor unit installed in abnormal environmental conditions. (Optional - job condition specific.)

All pipes are independently insulated. All insulation seams and joints are airtight. Insulation is not compressed. Double layer insulation is provided at pipe supports and wall penetrations.

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 77

INSTALLATION CHECKLIST

PAGE 2 of 2

System ID No.: _________________________________________________ Indoor Unit ID.: ____________________________________

Checked by: __________________________________ Date:__________________ Signature: ___________________________________

Electrical N/A Not Complete Complete

Power provided is single phase, ±10% of indoor unit nameplate specifications. Power wires properly sized and protected per NEC and local codes. Indoor unit is properly grounded. Power and communications conductors are separated by the recommended minimum distance. Terminal block screws are tight. Power wires are not in contact with terminals 3(A) and / or 4(B). Line voltage

wires have spade connectors installed. Power wires are properly secured to the control box case to prevent wire tension at the terminal block. Wires are protected from chaffing at control box and conduit pipe penetrations. (Optional) Smoke detector is properly installed and wired. New batteries are installed (if applicable). Low voltage control cables are properly secured to the control panel case. Terminal block screws are tight and

the cable is protected from sharp edges at control box case and conduit openings. Cables are installed at recommended distances from high voltage and EMF generating equipment. Outdoor unit / Indoor unit communications cable (terminals 3[A] and 4[B]). Field provided communications cable is 18-2 stranded and shielded. All terminations are made at the terminal

block. No inline splices or wire caps are present. Communications cable is plenum rated. Communications cable shield is tied back and is grounded at only ONE end.

Wall Mounted Zone Controller Communications N/A Not Complete Complete

LG factory provided zone controller stranded, shielded (white jacket) cable was used between the zone controller(s) and indoor unit(s).

Zone controller cable has not been cut, spliced, or tied together with wire caps. Factory plugs are present. Cable is securely plugged into the socket on the zone controller or the three screw terminals (controller model

specific); Yellow to “Y”, Red to “R”, and Black to “B”. Zone controller DIP switches have been adjusted for the application’s space temperature sensing strategy.

Indoor Unit Control Panel N/A Not Complete Complete

Zone controller cable is securely plugged into the CN-REMO socket on the indoor unit circuit board. If an optional remote temperature sensor was installed, the associated cable is plugged into socket CN-ROOM

(the factory return air thermistor has been unplugged). Indoor unit DIP switches have been adjusted for application (group control-master/slave; continuous fan

operation; dry contact). If a gravity drain primary condensate system is used (condensate pipe ONLY connected to the lowest nipple)

the CN-D / Pump plugged has been removed from the socket on the control board (High-Static models only). All plugs are properly seated in the sockets on the control board. Power and communications cables are properly restrained and separated.

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 78

Multi V Ducted Indoor Units

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 79

Who to call for assistance

Freight Damage and Unit Replacements Your LG Manufacturer Representative Missing Parts Your LG Manufacturer Representative Freight Damage and Unit Replacements Your LG Manufacturer Representative Received Wrong Indoor Unit Model Your LG Manufacturer Representative Installation, Startup, and Commissioning Technical Assistance 1-888-865-3026

For warranty information, visit www.lghvac.com.

Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

Page 80

LG Electronics

20001747 ISO 9001: 2008

LG ELECTRONICS INC.

Commercial Air Conditioning Division

11405 Old Roswell Road

Alpharetta, Georgia 30009

www.lghvac.com

LG Customer Information Center, Commercial Products

1-888-865-3026 USA

Follow the prompts for commercial A/C products and parts.

IM_MultiV_Ducted_IDU_5_16

Supersedes: IM-MultiV-DuctedIDU-08-14