LG Multi V User manual

FLOOR-STANDING INDOOR UNIT
INSTALLATION MANUAL
GEN 4 Floor Standing Cased Models:
• ARNU073CEA4
• ARNU093CEA4
• ARNU123CEA4
• ARNU153CEA4
• ARNU183CFA4
• ARNU243CFA4
GEN 4 Floor Standing Uncased Models:
• ARNU073CEU4
• ARNU093CEU4
• ARNU123CEU4
• ARNU153CEU4
• ARNU183CFU4
• ARNU243CFU4

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.
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.
For more technical materials such as submittals, engineering
databooks, and catalogs, visit www.lghvac.com.
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.
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.
IM_MultiV_IV_FloorStanding_8_17

3
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
TABLE OF CONTENTS
CONTENTS
Proprietary Data Notice ................................................................................................................................... 2
Safety Instructions........................................................................................................................................... 4
Introduction...................................................................................................................................................... 8
Floor-Standing Indoor Units.......................................................................................................................................... 8
Safety ........................................................................................................................................................................... 8
Required Tools (eld provided) ..................................................................................................................................... 8
Required Parts (eld provided)..................................................................................................................................... 8
Unit Nomenclature......................................................................................................................................... 10
R410A Refrigerant......................................................................................................................................... 11
General Data ................................................................................................................................................. 12
Specications ............................................................................................................................................................. 12
Dimensions ................................................................................................................................................................ 14
Electrical Data ............................................................................................................................................................ 16
Refrigerant Piping Diagram ........................................................................................................................................ 17
General Installation Guidelines...................................................................................................................... 18
Location Selection ...................................................................................................................................................... 18
Required Clearances.................................................................................................................................................. 19
Unpack and Inspect for Freight Damage.................................................................................................................... 19
Installation ..................................................................................................................................................... 20
Install Floor-Standing Units ........................................................................................................................................ 20
Refrigerant Piping.......................................................................................................................................... 21
Drilling the Piping Hole in the Wall.............................................................................................................................. 21
Piping Preparations .................................................................................................................................................... 21
Piping Materials and Handling.................................................................................................................................... 23
Refrigerant Safety....................................................................................................................................................... 23
Brazing ....................................................................................................................................................................... 24
Refrigerant Piping Connections.................................................................................................................................. 25
Insulating the Piping ................................................................................................................................................... 25
Condensate Drain Piping............................................................................................................................... 26
Install the Condensate Drain Pipe.............................................................................................................................. 26
Wiring ............................................................................................................................................................ 27
Connecting Power and Control Wiring ....................................................................................................................... 27
Indoor Unit Communications Cable Connections....................................................................................................... 28
Communications and Power Cable Connection......................................................................................................... 29
DIP Switch Settings for Gen4 Indoor Units................................................................................................................. 30
Floor-Standing Cassette Cased and Uncased Chassis ............................................................................................ 31
Wall-Mounted Sensor Installation............................................................................................................................... 33
Wall-Mounted Controller Installation........................................................................................................................... 33
Controls Setup............................................................................................................................................... 34
Installation Checklist...................................................................................................................................... 38

4
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
The instructions below must be followed to prevent product malfunction, property damage, injury or death to the user or other people. Incor-
rect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the symbols below.
SAFETY INSTRUCTIONS
WARNING
Do not install, remove, or re-install the unit by yourself
(customer). Ask the dealer or an authorized technician to
install the unit.
Improper installation by the user may result in water leakage, re,
explosion, electric shock, physical injury or death.
For replacement of an installed unit, always contact a trained
LG 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 com-
missioning 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.
Do not install the unit using a defective stand.
There is risk of physical injury or death.
Wear protective gloves when handling equipment.
Sharp edges may cause personal injury.
Dispose 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 mea-
sures to prevent the refrigerant concentration from exceed-
ing 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 re-
frigerant leaks and safety limits are exceeded, it could result in personal
injuries or death from oxygen depletion
DANGER
This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING
This symbol indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION
This symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or
moderate injury.
Note:
This symbol Indicates situations that may result in equipment or property damage accidents only.
This symbol indicates an action that should not be performed.
TABLE OF SYMBOLS
INSTALLATION
DANGER
Don’t use or store ammable gas or combustibles near the unit.
There is risk of product failure, re, explosion, and physical injury or death.

5
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
CAUTION
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 a minimum of four points to avoid slippage from rigging apparatus.
SAFETY INSTRUCTIONS
INSTALLATION – CONTINUED
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 equip-
ment, 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 pre-
serving 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 be 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 ac-
cording 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, stable location where no one can
step on or fall onto it. Do not install the unit with defective
attaching or mounting hardware.
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. Do not open service valves on the unit until all
non-condensibles have been removed from the piping sys-
tem and authorization to do so has been obtained from the
commissioning agent.
There is a risk of refrigerant contamination, refrigerant loss and equip-
ment damage.

6
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
SAFETY INSTRUCTIONS
WIRING
DANGER
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.
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.
WARNING
The information contained in this manual is intended for use
by an industry-qualied, experienced, certied 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 per-
formed properly, it may result in re, electric shock, physical injury or death.
Do not turn on the breaker or power under condition if the
front panel, cabinet, top cover, control box cover are re-
moved or opened.
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.
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:
Do not cut, lengthen or shorten the communications and
power cable between any dry contact unit and its connected
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.

7
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
OPERATION
DANGER
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.
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 operat-
ing 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.
SAFETY INSTRUCTIONS
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 special-
purpose 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.
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 deterio-
rated.
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.
WARNING
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 the 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.
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.
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.
Do not use the remote if the batteries have leaked. If the
liquid from the batteries gets onto skin or clothes, wash it
well with clean water
Battery chemicals could cause burns or other injuries.
CAUTION
To avoid physical injury, turn off main power and use caution
when cleaning or servicing the air conditioner.
There is risk of electric shock.

8
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
INTRODUCTION
Floor-Standing Indoor Units
This manual describes how to install LG Cased and Uncased Floor-
Standing indoor units (IDU) for Multi V Variable Refrigerant Flow
(VRF) heat pump and heat recovery systems. Table 1 lists the avail-
able 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 instal-
lation. 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. In the event of a conflict between any
applicable code and the instructions in this manual, comply with the
applicable code.
Required Parts (field provided)
• Connecting cable (power and control)
• Pipes - vapor line and liquid line, with insulation
• Additional drain hose
• Type “A” Screws (Four [4] Each)
WARNING
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:
• 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 prevent proper operation of the unit.
• Please read all instructions before installing this product. Become familiar with the unit’s components and connections, and the order of
installation. Incorrect installation can degrade or prevent proper operation.
Figure 1: Cased Floor-Standing Indoor Unit.
Required Tools (field provided)
• Drain Hose (One [1] Each)
• Screws (Five [5] Each)
• Insulation (One [1] Each for Vapor Pipe; One [1] Each for Liquid Pipe)
• Cable Ties (Eight [8]) Each)
• Conduit Mounting Plate (One [1] Each)
Figure 2: Uncased Floor-Standing Indoor Unit.
Required Parts (factory provided)
• Level
• JIS and other screwdrivers
• Electrical lineman pliers
• Electric drill
• Holesaw
• Drill
• Flaring tool set
• Tubing cutter
• Tube/pipe reamer
• Torque wrenches
• Allen wrench
• Gas-leak detector
• Thermometer

9
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Unit Model Number
Cased ARNU073CEA4
ARNU093CEA4
ARNU123CEA4
ARNU153CEA4
ARNU183CFA4
ARNU243CFA4
Uncased ARNU073CEU4
ARNU093CEU4
ARNU123CEU4
ARNU153CEU4
ARNU183CFA4
ARNU243CFA4
Table 1: Multi V Floor-Standing Indoor Units
INTRODUCTION

10
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Floor Standing Indoor Units Nomenclature
UNIT NOMENCLATURE
ARN U07 3TN C
Generation
2 = Second
4 = Fourth
A = Second, Revision A
Electrical Ratings
3 = 208–230V/60Hz/1Ph
05 = 5,000 Btu/h
07 = 7,000 Btu/h
09 = 9,000 Btu/h
12 = 12,000 Btu/h
15 = 15,000 Btu/h
18 = 18,000 Btu/h
24 = 24,000 Btu/h
Type
U = DC Inverter Heat Pump
Family
ARN = Multi V Indoor Unit
(Refrigerant R410A)
CE = Floor Standing (small frame)
CF = Floor Standing (large frame)
U = Uncased
Indoor Unit Nominal Capacity
Model
4
Feature

11
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
R410A REFRIGERANT
R410A Refrigerant
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.
WARNING
Do not place 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.

12
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Table 2: Cased Floor-Standing Indoor Units Specications.
GENERAL DATA
Specications
Model No. ARNU073CEA4 ARNU093CEA4 ARNU123CEA4 ARNU153CEA4 ARNU183CFA4 ARNU243CFA4
Cooling Mode Performance
Capacity (Btu/h) 7,500 9,600 12,300 15,400 19,100 24,200
Power Input1(W) 85 85 85 85 115 115
Heating Mode Performance
Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 27,300
Power Input1(W) 85 85 85 85 115 115
Entering Mixed Air
Cooling Max. (°F WB) 76 76 76 76 76 76
Heating Min. (°F DB) 59 59 59 59 59 59
Unit Data
Refrigerant Type2R410A R410A R410A R410A R410A R410A
Refrigerant Control EEV EEV EEV EEV EEV EEV
Sound Pressure3dB(A) (H/M/L) 35 / 33 / 31 36 / 34 / 32 37 / 35 / 33 38 / 37 / 35 40 / 37 / 34 43 / 40 / 37
Net Unit Weight (lbs.) 59.5 59.5 59.5 59.5 75.0 75.0
Shipping Weight (lbs.) 68.3 68.3 68.3 68.3 86.0 86.0
Communication Cable4
(No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18
Fan
Type Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco
Motor 2 2 2 2 2 2
Housing 3 3 3 3 4 4
Motor/Drive Brushless Digitally Controlled / Direct
Airflow Rate H/M/L (CFM)
High Mode (Factory Set) 300 / 265 / 229 335 / 300 / 265 371 / 335 / 300 406 / 353 / 335 565 / 494 / 424 635 / 565 / 494
External Static Pressure (in. wg)
High Mode (Factory Set) 0 0 0 0 0 0
Piping
Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare
Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare
Condensate Line (in., I.D.) 1 1 1 1 1 1
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes.
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 combina-
tion 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).
1Power Input is rated at high speed.
2Take 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.
3Sound Pressure levels are tested in an anechoic chamber under ISO Standard 3745.
4All communication cable to be minimum 18 AWG, 2-conductor, twisted, 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
communication cable at any other point.

13
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA
Table 3: Uncased Floor-Standing Indoor Unit Specications.
Specications
EEV: Electronic Expansion Valve
Power wiring is field supplied and must comply with the applicable local and national
codes.
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 combina-
tion 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).
1Power Input is rated at high speed.
2Take 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.
3Sound Pressure levels are tested in an anechoic chamber under ISO Standard 3745.
4All communication cable to be minimum 18 AWG, 2-conductor, twisted, 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
communication cable at any other point.
Model No. ARNU073CEU4 ARNU093CEU4 ARNU123CEU4 ARNU153CEU4 ARNU183CFU4 ARNU243CFU4
Cooling Mode Performance
Capacity (Btu/h) 7,500 9,600 12,300 15,400 19,100 24,200
Power Input1(W) 85 85 85 85 115 115
Heating Mode Performance
Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 27,300
Power Input1(W) 85 85 85 85 115 115
Entering Mixed Air
Cooling Max. (°F WB) 76 76 76 76 76 76
Heating Min. (°F DB) 59 59 59 59 59 59
Unit Data
Refrigerant Type2R410A R410A R410A R410A R410A R410A
Refrigerant Control EEV EEV EEV EEV EEV EEV
Sound Pressure3dB(A) (H/M/L) 35 / 33 / 31 36 / 34 / 32 37 / 35 / 33 38 / 37 / 35 40 / 37 / 34 43 / 40 / 37
Net Unit Weight (lbs.) 46.3 46.3 46.3 46.3 58.4 58.4
Shipping Weight (lbs.) 56.2 56.2 56.2 56.2 68.3 68.3
Communication Cable4
(No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18
Fan
Type Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco
Motor 2 2 2 2 2 2
Housing 3 3 3 3 4 4
Motor/Drive Brushless Digitally Controlled / Direct
Airflow Rate H/M/L (CFM)
High Mode (Factory Set) 300 / 265 / 229 335 / 300 / 265 371 / 335 / 300 406 / 353 / 335 565 / 494 /
424
635 / 565 /
494
External Static Pressure (in. wg)
High Mode (Factory Set) 0 0 0 0 0 0
Piping
Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare
Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare
Condensate Line (in., I.D.) 1 1 1 1 1 1

14
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA
Dimensions – CEA Cased, CEU Uncased Units
With Case
42
42
5-13/16 5-13/16
15/16
2-3/4 25
8
Air Supply
Air Return
Unit: inches
Note: All measurements
have a tolerance of ±1/4 in.
Without Case
38-1/2
31-5/16
25-3/16
1/2
3/4
2-1/2
7-15/16
6-5/16 1/2
WModel
ARNU073CEA4
ARNU093CEA4
ARNU123CEA4
ARNU153CEA4
H
42 25 8
ARNU073CEU4
ARNU093CEU4
ARNU123CEU4
ARNU153CEU4
38-1/2 25-3/16 7-15/16
D

15
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA
Dimensions – CFA Cased, CFU Uncased Units
8
52-15/16
25
2-3/4
5-13/16
41-1/4
1-15/16
5-13/16
7-1/2
6-5/16
49-7/16
43-1/4
42-3/16
4-5/16
1-3/16
3-3/16
5-11/16
2-3/4
13/16
25-5/32
8
With Case
Unit: inches
Note: All measurements
have a tolerance
of ±1/4 in.
Without Case
Air Supply
Air Return
1/2
W
Model
ARNU183CFA4
ARNU243CFA4
H
52-15/16 25 8
ARNU183CFU4
ARNU243CFU4 49-7/16 25-3/16 7-1/2
D

16
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA
Electrical Data
• MCA = Minimum circuit ampacity; MOP = Maximum overcurrent protection
• Units must be connected to an electrical power system that supplies voltage within the listed range limits
• Select wire size based on the larger MCA value
• Use circuit breakers instead of fuses
Table 4: Floor Standing (CEA, CFA [Cased]; CEU, CFU [Uncased]) Indoor Unit.
Electrical Data
Model Voltage Range MCA MOP Rated Amps (A) Power Supply Power Input (W)
Hz Volts Phase Cooling Heating
CEA / CFA (Cased) Units
ARNU073CEA4
208-230
1.0
15
0.76
60 208-230 1
85 85
ARNU093CEA4 1.0 0.76 85 85
ARNU123CEA4 1.0 0.76 85 85
ARNU153CEA4 1.0 0.76 85 85
ARNU183CFA4 1.2 15 0.97 115 115
ARNU243CFA4 1.2 0.97 115 115
CEU / CFU (Uncased) Units
ARNU073CEU4
208-230
1.0
15
0.76
60 208-230 1
85 85
ARNU093CEU4 1.0 0.76 85 85
ARNU123CEU4 1.0 0.76 85 85
ARNU153CEU4 1.0 0.76 85 85
ARNU183CFU4 1.2 15 0.97 115 115
ARNU243CFU4 1.2 0.97 115 115

17
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA
Refrigerant Piping Diagrams
Figure 3: Refrigerant Piping Diagram CEA and CFA Cased, CEU and CFU Uncased Chassis
Heat Exchanger
Sirocco Fan
TH3
TH1
TH2
lndoor unit
EEV Heating
Cooling
Filter
Filter

18
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Location Selection
DANGER
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.
Select a location for installing Floor-Standing Indoor Units (IDU) that meets the following conditions:
• Where the oor / wall is solid and has enough structural strength to bear the weight of the indoor 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 and away from the unit when it is in cooling mode.
• Use a level indicator to ensure the unit is installed on a level plane.
• Use a stud nder to locate studs easily, preventing unnecessary damage to the wall.
• Where air circulation will not be blocked and following the required clearances.
• Install the indoor unit in a location where it can be easily connected to the outdoor unit / heat recovery unit.
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.
Do not install the unit near a doorway.
GENERAL INSTALLATION GUIDELINES
The unit may be damaged, may malfunction, and / or will not operate as designed if installed in any of the conditions listed.
Note:
The unit should not be installed near a heat or steam source, or where considerable amounts of oil, iron powder, or our are used. (These mate-
rials may generate condensate, cause a reduction in heat exchanger efciency, or the drain to malfunction. If this is a potential problem, install a
ventilation fan large enough to vent out these materials.)
Location Selection
Installing in an Area Exposed to Unconditioned Air
In some installation applications, areas (floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an
unheated garage or storeroom). To countermeasure:
• Verify that carpet is or will be installed (carpet may increase the temperature by three [3] degrees).
• Add insulation between the oor joists.
• Install radiant heat or another type of heating system to the oor.
Note:
• Indoor units (IDUs) should not be placed in an environment where the IDUs may be exposed to harmful volatile organic compounds (VOCs)
or in environments where there is improper air make up or supply or inadequate ventilation. If there are concerns about VOCs in the
environment where the IDUs are installed, proper air make up or supply and/ or adequate ventilation should be provided. Additionally, in
buildings where IDUs will be exposed to VOCs consider a factory-applied epoxy coating to the fan coils for each IDU.
• If the unit is installed near a body of water, the installation parts are at risk of corroding. Appropriate anti-corrosion methods should be taken
for the unit and all installation parts.

19
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL INSTALLATION GUIDELINES
Unpack and Inspect for Freight Damage
CAUTION
Shipping and net weights of the wall-mounted indoor units are listed in Tables 2 and 3. To help avoid injury to personnel and damage to the unit, use
at least two people when carrying a unit by hand.
Do not unpack the unit and remove the protective materials until ready to install. Before unpacking, carefully move the packaged unit to a
work area near the installation location.
After opening, if the unit is damaged, repack the unit as it was shipped to you. RETAIN ALL PACKING MATERIALS. In general, freight dam-
age claims will be denied if the original packing materials are not retained for the claims adjustor to inspect. Call your supervisor on how to
proceed with filing a freight claim and to order a replacement unit.
Note:
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 “Indoor Units Nomenclature” on page 10.
Required Clearances / Inspection
Required Clearances
Figure 1: Selecting the Best Location / Minimum Clearance Requirements — Floor Standing Indoor Units.
3/4 or
more
5-7/8
or
more
3-15/16
or
more
6-7/8
or
more
Front
Base
Supply air
direction
Return air
direction
39-3/8
or
more
Window
B
Maintenance area
Window
A
25-3/4
2-3/16 or more
Cased
Uncased
3/4 or
more
5-7/8
or
more
3-15/16
or
more
6-7/8
or
more
Front
Base
Supply air
direction
Return air
direction
39-3/8
or
more
Window
B
Maintenance area
Window
A
25-3/4
2-3/16 or more
Cased
Uncased
Indoor Unit A
(Inch)
B
(Inch)
Floor Standing Cased and Uncased CEA / CEU Frames ≥31 ≥42-1/2
Floor Standing Cased and Uncased CFA / CFU Frames ≥42 ≥53-1/2
Table 5: Floor Standing Minimum Maintenance Requirements.

20
Multi V Floor-Standing Indoor Unit
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
INSTALLATION
Inspection / General Mounting / Mounting the Installation Plate
WARNING
• Installation mount must be securely installed to prevent the chassis falling from its installation
location. There is risk of personnel injury from falling equipment.
• When choosing a location for the installation mount, be sure to take into consideration
routing of wiring for power outlets within the wall. Touching wiring can cause serious bodily
injury or death.
• 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.
Note:
• Installation mount must be securely installed to prevent the chassis falling from its installa-
tion location. There is risk of property damage from falling equipment.
• Ensure the unit is properly installed. Incorrectly installed units can result in degraded perfor-
mance or an inoperative unit / system.
• Use a level indicator to ensure the installation mount and chassis are installed on a level plane.
General Mounting
1. Use the installation mount. To provide stabilization, floor standing indoor units
need to be secured to a wall. Ensure the wall is strong enough to bear the
weight of the unit. If necessary, reinforce the wall before installing the unit.
2. Mark the appropriate location on the wall for the holes, then drill the holes.
3. Apply the installation mount and install the Floor Standing indoor unit.
Type A (Inch)
Floor Standing Cased and Uncased CEA / CEU Frames 33-3/4
Floor Standing Cased and Uncased CFA / CFU Frames 44-3/4
Table 6: Location of the Wall Bolts for Floor Standing Indoor Units.
Note:
• The unit requires a minimum clearance of 3-15/16 inches below the unit for air intake.
• Verify that the floor standing indoor unit is level so that drainage flows smoothly. If there is an incline, water may leak.
• Depending on the shape and type of the wall surface, the indoor unit operating sound may be louder.
7-13/16
A
7-5/8
Unit: Inch
Figure 2: Bolt Pitch for Floor Standing Indoor Units.
Opening / Closing the Front Panel
1. Open the lid of control panel on both the left and right sides.
2. Remove the screws on both the left and right sides.
3. Remove the front panel from the floor-standing indoor unit.
To close the front panel, reverse the steps listed above.
(1)
(1)
(2)
(2)
(3)
Figure 3: Opening / Closing the Front Panel.
1. Before opening the shipping container, verify you have the correct unit as described in the previous Note.
2. Place the box on a solid surface right side up.
3. Cut the white reinforced nylon straps.
4. Open the top of the box and fold back all four flaps.
5. Remove any protective cardboard/Styrofoam®top sheets and place to the side.
6. Lift the cardboard carton by the flaps and remove the box walls and top and place it to the side.
7. Remove any moisture barrier plastic bonnet.
8. Check the unit nameplate data and model number. Verify the unit voltage, and capacities are correct before proceeding.
9. Locate and retain the factory-supplied parts.
10. 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 chassis only. If damage is found, repack the unit as it was received in the original container.
11.If the unit is undamaged, remove and retain the installation manual.
Unpack and Inspect for Freight Damage, continued.