LG Multi V Art Cool ARNU093SFA4 Installation and operation manual

WALL-MOUNTED INDOOR UNIT
ENGINEERING MANUAL
Art Cool™Mirror Wall-Mounted
5,500 to 24,200 Btu/h
Standard Wall-Mounted
5,500 to 35,500 Btu/h
Art Cool™Gallery
9,600 and 12,300 Btu/h

For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice.
© 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.
This document is for design purposes only.
A summary list of safety precautions is on page 3.
To access additional technical documentation such as submittals, outdoor
unit engineering manuals, installation, service, product data performance,
general best practice, and building ventilation manuals, as well as white
papers, catalogs, LATS software programs, and more, log in to
www.lghvac.com.

INTRODUCTION |3
Introduction
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
TABLE OF CONTENTS
Unit Nomenclature................................................................................. 4
LATS Overview ................................................................................... 5-6
Refrigerant Charge Worksheet.......................................................... 7-9
Art Cool™ Gallery Indoor Units .................................................... 10-23
Mechanical Specications ..................................................................11
General Data ..................................................................................... 12
Electrical Data ................................................................................... 13
External Dimensions.......................................................................... 14
Electrical Wiring Diagram .................................................................. 15
Refrigerant Flow Diagram.................................................................. 16
Acoustic Data ............................................................................... 17-18
Air Velocity / Temperature Distribution............................................... 19
Capacity Tables ............................................................................ 20-23
Art Cool™ Mirror Wall-Mounted Indoor Units.............................. 24-64
Mechanical Specications ............................................................ 25-26
General Data ..................................................................................... 27
Electrical Data ................................................................................... 28
External Dimensions..................................................................... 29-30
Electrical Wiring Diagram .................................................................. 31
Refrigerant Flow Diagram.................................................................. 32
Acoustic Data ............................................................................... 33-36
Air Velocity / Temperature Distribution.......................................... 37-50
Capacity Tables ............................................................................ 51-64
Standard Wall-Mounted Indoor Units ......................................... 65-113
Mechanical Specications ............................................................ 66-67
General Data ................................................................................ 68-69
Electrical Data ................................................................................... 70
External Dimensions..................................................................... 71-73
Electrical Wiring Diagram ............................................................. 74-75
Refrigerant Flow Diagram.................................................................. 76
Acoustic Data ............................................................................... 77-80
Air Velocity / Temperature Distribution.......................................... 81-95
Capacity Tables .......................................................................... 96-113
Application Guidelines............................................................... 114-122
Selecting the Best Location..............................................................115
General Mounting......................................................................116-117
General Drain Piping Information ..............................................118-119
Wiring Guidelines ..................................................................... 120-122
Wired Controller Placement............................................................. 122
Acronyms........................................................................................... 123
TABLE OF SYMBOLS
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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.
This symbol indicates situations that may result in equipment or property damage accidents only.
This symbol indicates an action must not be completed.
DANGER
CAUTION

4|INTRODUCTION
MULTI V Wall-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
ARN U07 3TN C
Generation
2 = Second
4 = Fourth
A = Second, Revision A
Electrical Ratings
3 = 208–230V/60Hz/1Ph
05 = 5
07 = 7
09 = 9
12 = 12
15 = 15
18 = 18
24 = 24
28 = 28
30 = 30
36 = 36
42 = 42
48 = 48
54 = 54
76 = 76
96 = 96
Type
U = DC Inverter Heat Pump
Family
ARN = Multi V Indoor Unit
(Refrigerant R410A)
Feature
A, C, D, L, R = Standard*
G = Low Static
U = Uncased
Indoor Unit Capacity (Mbh)
Model
4
*Filter accessories are available separately. Always follow all local, state, and national building codes with the use of this or any
product.
UNIT NOMENCLATURE
B8 = Ducted (high static)
BH = Ducted (high static)
CE = Floor Standing (small frame)
CF = Floor Standing (large frame)
L1 = Ducted (low static)
L2 = Ducted (low static)
L3 = Ducted (low static)
M2 = Ducted (high static)
M3 = Ducted (high static)
NJ = Vertical/Horizontal Air Handling
Unit
NK = Vertical/Horizontal Air Handling
Unit
SF = Wall Mounted / Art Cool™ Gallery
SJ = Wall Mounted / Art Cool Mirror
SK = Wall Mounted / Art Cool Mirror
SV = Wall Mounted / Standard
TT = 1-Way Ceiling Cassette
TU = 1-Way Ceiling Cassette
TS = 2-Way Ceiling Cassette
TM = 4-Way Ceiling Cassette
TN = 4-Way Ceiling Cassette
TQ = 4-Way Ceiling Cassette
TR = 4-Way Ceiling Cassette

INTRODUCTION |5
Introduction
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
LG Air Conditioner Technical Solution (LATS) Software
A properly designed and installed refrigerant piping system is critical to the optimal performance of LG air-conditioning systems. To assist
engineers, LG offers, free of charge, LG Air Conditioner Technical Solution (LATS) software—a total design solution for LG air conditioning
systems.
To reduce the risk of designing an improper applied system or one that will not operate correctly, LG requires that LATS software be used on all
projects.
Formats
LATS is available to LG customers in three user interfaces: LATS HVAC, LATS CAD2, and LATS REVIT. All three LATS formats are available
through www.myLGHVAC.com, or contact an LG Sales Representative.
LATS HVAC is a Windows®-based application that aids engineers in designing LG Variable Refrigerant Flow (VRF), Multi F / Multi F MAX,
Single-Zone, and Energy Recovery Ventilator (ERV) systems.
*Windows® is a registered mark of Microsoft® Corporation.
LATS CAD2 combines the LG LATS program with AutoCAD®
software**. It permits engineers to layout and validate LG Multi V
Variable Refrigerant Flow (VRF), Multi F / Multi F MAX, Single-Zone,
and Energy Recovery Ventilator (ERV) systems directly into CAD
drawings.
LATS Revit integrates the LG LATS program with Revit®software**.
It permits engineers to layout and validate Multi V VRF systems
directly into Revit drawings.
**AutoCAD® and Revit® are both registered marks of Autodesk, Inc.
Features
All LG product design criteria have been loaded into the program,
making LATS simple to use: double click or drag and drop the
component choices. Build systems in Tree Mode where the
refrigerant system can be viewed. Switch to a Schematic diagram to see the electrical and communications wiring.
LATS software permits the user to input region data, indoor and outdoor design temperatures, modify humidity default values, zoning, specify
type and size of outdoor units and indoor units, and input air flow and external static pressure (ESP) for ducted indoor units.
The program can also:
LG AIR CONDITIONER
TECHNICAL SOLUTION (LATS)
• Import building loads from a separate Excel file.
• Present options for outdoor unit auto selection.
• Automatically calculate component capacity based on design
conditions for the chosen region.
• Verify if the height differences between the various system
components are within system limits.
• Provide the correct size of each refrigerant piping segment and LG
Y-Branches and Headers.
• Adjust overall piping system length when elbows are added.
• Check for component piping limitations and flag if any parameters
are broken.
• Factor operation and capacity for defrost operation.
• Calculate refrigerant charge, noting any additional trim charge.
• Suggest accessories for indoor units and outdoor units.
• Run system simulation.
Features depend on which LATS program is being used, and the type of system being designed.
Figure 1: Example of LATS CAD2.

6|INTRODUCTION
MULTI V Wall-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
LATS Generates a Complete Project Report
LATS software also generates a report containing project design parameters, cooling and heating design data, system component perfor-
mance, and capacity data. The report includes system combination ratio and refrigerant charge calculations; and provides detailed bill of
material, including outdoor units, indoor units, control devices, accessories, refrigerant pipe sizes segregated by building, by system, by pipe
size, and by pipe segments. LATS can generate an Excel GERP report that can imported into the LG SOPS pricing and ordering system.
Proper Design to Install Procedure
LG encourages a two report design-to-install-procedure. After the
design engineer determines building / zone loads and other details,
the engineer opens the LATS program and inputs the project’s infor-
mation. When the design is complete, the “Auto Piping” and “System
Check” functions must be used to verify piping sizes, limitations, and
if any design errors are present. If errors are found, engineers must
adjust the design, and run Auto Piping and System Check again.
When the design passes the checks, then the engineer prints out
a project “Shop Drawing” (LATS Tree Diagram) and provides it to
the installing contractor. The contractor must follow the LATS Tree
Diagram when building the piping system, but oftentimes the design
changes on the building site:
• Architect has changed location and/or purpose of room(s).
• Outdoor unit cannot be placed where originally intended.
• Structural elements prevent routing the piping as planned.
• Air conditioning system conflicts with other building systems
(plumbing, gas lines, etc.).
The contractor must mark any deviation from the design on the Shop Drawing, including as-built straight lines and elbows. This “Mark Up”
drawing must be returned to the design engineer or Rep, who must input contractor changes into the LATS file. (Copy the original LATS soft-
ware file, save and rename as a separate file, and modify all piping lengths by double-clicking on each length and editing information.) Like
the shop drawing, the Auto Piping and System Check must also be run on this new “As Built” drawing. The design engineer or Rep must then
provide the final As Built file to the contractor. The Mark Up version must be compared to the As Built version for:
• Differences in pipe diameter(s). If incorrect diameters have been installed, the piping must be changed out. If pipe diameters have changed,
check to see if Y-Branches will also need to be changed.
• Changes to outdoor unit and indoor unit capacities. Capacities changes may impact line length changes.
• Additional refrigerant charge quantity (“Trim Charge”). Trim charge will change if piping lengths and diameters change. The As Built version
must reflect installed piping lengths to ensure correct trim charge.
All documents submitted by the contractor, as well as the Shop Drawing and the As Built Drawing files must be provided for commissioning
purposes. Model and serial numbers for all system components must also be submitted. If the steps previously detailed are not followed,
and all documents are not provided to the commissioning agent, the project runs the risk of not being commissioned and voiding any limited
warranty LG offers on the equipment.
LG AIR CONDITIONER
TECHNICAL SOLUTION (LATS)
Figure 2: Example of a LATS Tree Diagram.

INTRODUCTION |7
Introduction
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Multi V 5 System R410A Refrigerant Charge Calculator (lbs.)
REFRIGERANT CHARGE WORKSHEET
1CF (Ref.) = Correction Factor for Refrigerant Charge. 2For refrigerant charge purposes, consider only the liquid line; ignore the vapor line(s).
System Tag or ID:
Job Name: __________________________________________
Project Manager: ____________________________________ Date: ______________
Line # Description Chassis I.D. Size Quantity CF (Ref.)1Total (lbs.)
1 Linear feet of 1/4" liquid line tubing2— — 0.015
2 Linear feet of 3/8" liquid line tubing2— — 0.041
3 Linear feet of 1/2" liquid line tubing2— — 0.079
4 Linear feet of 5/8" liquid line tubing2— — 0.116
5 Linear feet of 3/4" liquid line tubing2— — 0.179
6 Linear feet of 7/8" liquid line tubing2— — 0.238
7 Linear feet of 1" liquid line tubing2— — 0.323
8 Standard + Art Cool Mirror SJ, SK 5k to 15k 0.53
9 Standard + Art Cool Mirror SJ, SK 18k to 24k 0.62
10 Standard SV 30k to 36k 1.01
11 Art Cool Gallery SF 9k to 12k 0.22
12 1-Way Cassette TU 7k to 12k 0.44
13 1-Way Cassette TT 18k to 24k 0.64
14 2-Way Cassette TS 18k to 24k 0.75
15 4-Way 2' x 2' Cassette TR 5k to 7k 0.40
16 4-Way 2' x 2' Cassette TR 9k to 12k 0.55
17 4-Way 2' x 2' Cassette TQ 15k to 18k 0.71
18 4-Way 3' x 3' Cassette TN 7k to 24k 0.88
19 4-Way 3' x 3' Cassette TM 28k to 36k 1.08
20 4-Way 3’ x 3’ Cassette TM 42k to 48k 1.41
21 High Static Ducted BH 7k to 24k 0.57
22 High Static Ducted M2 7k to 24k 0.77
23 High Static Ducted M2 28k to 42k 1.15
24 High Static Ducted M3 28k to 54k 1.35
25 High Static Ducted B8 36k to 96k 2.20
26 Low Static Ducted, Low Static Ducted Bottom Return L1 5k to 9k 0.31
27 Low Static Ducted, Low Static Ducted Bottom Return L2 12k to 18k 0.42
28 Low Static Ducted, Low Static Ducted Bottom Return L3 21k to 24k 0.55
29 Vertical / Horizontal Air Handling Unit NJ 12k to 30k 1.04
30 Vertical / Horizontal Air Handling Unit NJ 36k 1.57
31 Vertical / Horizontal Air Handling Unit NK 42k to 54k 2.00
32 Floor Standing CE (U) 7k to 15k 0.37
33 Floor Standing CF (U) 18k to 24k 0.82
34 HRU: PRHR022A/023A, 032A/033A, 042A/043A, 063A, 083A — — 1.1
35 ADDITIONAL Refrigerant Charge Required (Sum of lines 1 – 34)
36 Outdoor Unit Factory Refrigerant Charge
36A ARUM072*TE5 72k 14.3
36B ARUM096*TE5 96k 23.2
36C ARUM121*TE5 121k 23.2
36D ARUM144*TE5 144k 26.5
36E ARUM168*TE5 168k 26.5
36F ARUM192*TE5 192k 30.9
36G ARUM216*TE5 216k 37.5
36H ARUM241*TE5 241k 37.5
37 Total ODU FACTORY Refrigerant Charge (Sum of factory refrigerant charges for all ODUs in the system, lines 36A -36H)
38 TOTAL SYSTEM CHARGE
Sum of Additional Refrigerant Charge Required (line 35) and Total ODU Factory Refrigerant Charge (line 37)

8|INTRODUCTION
MULTI V Wall-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Water IV System R410A Refrigerant Charge Calculator (lbs.)
REFRIGERANT CHARGE WORKSHEET
1CF (Ref.) = Correction Factor for Refrigerant Charge. 2For refrigerant charge purposes, consider only the liquid line; ignore the vapor line(s).
System Tag or ID:
Job Name: __________________________________________
Project Manager: ____________________________________ Date: ______________
Line # Description Chassis I.D. Size Quantity CF (Ref.)1Total (lbs.)
1 Linear feet of 1/4" liquid line tubing2— — 0.015
2 Linear feet of 3/8" liquid line tubing2— — 0.041
3 Linear feet of 1/2" liquid line tubing2— — 0.079
4 Linear feet of 5/8" liquid line tubing2— — 0.116
5 Linear feet of 3/4" liquid line tubing2— — 0.179
6 Linear feet of 7/8" liquid line tubing2— — 0.238
7 Linear feet of 1" liquid line tubing2— — 0.323
8 Standard + Art Cool Mirror SJ, SK 5k to 15k 0.53
9 Standard + Art Cool Mirror SJ, SK 18k to 24k 0.62
10 Standard SV 30k to 36k 1.01
11 Art Cool Gallery SF 9k to 12k 0.22
12 1-Way Cassette TU 7k to 12k 0.44
13 1-Way Cassette TT 18k to 24k 0.64
14 2-Way Cassette TS 18k to 24k 0.75
15 4-Way 2' x 2' Cassette TR 5k to 7k 0.40
16 4-Way 2' x 2' Cassette TR 9k to 12k 0.55
17 4-Way 2' x 2' Cassette TQ 15k to 18k 0.71
18 4-Way 3' x 3' Cassette TN 7k to 24k 0.88
19 4-Way 3' x 3' Cassette TM 28k to 36k 1.08
20 4-Way 3’ x 3’ Cassette TM 42k to 48k 1.41
21 High Static Ducted BH 7k to 24k 0.57
22 High Static Ducted M2 7k to 24k 0.77
23 High Static Ducted M2 28k to 42k 1.15
24 High Static Ducted M3 28k to 54k 1.35
25 High Static Ducted B8 36k to 96k 2.20
26 Low Static Ducted, Low Static Ducted Bottom Return L1 5k to 9k 0.31
27 Low Static Ducted, Low Static Ducted Bottom Return L2 12k to 18k 0.42
28 Low Static Ducted, Low Static Ducted Bottom Return L3 21k to 24k 0.55
29 Vertical / Horizontal Air Handling Unit NJ 12k to 30k 1.04
30 Vertical / Horizontal Air Handling Unit NJ 36k 1.57
31 Vertical / Horizontal Air Handling Unit NK 42k to 54k 2.00
32 Floor Standing CE (U) 7k to 15k 0.37
33 Floor Standing CF (U) 18k to 24k 0.82
34 HRU: PRHR022A/023A, 032A/033A, 042A/043A, 063A, 083A — — 1.1
35 ADDITIONAL Refrigerant Charge Required (Sum of lines 1 – 34)
36 Water-Source Unit Factory
Refrigerant Charge
ARW*072BAS4, ARW*096BAS4, ARW*121BAS4, ARW*144BAS4 10.42
ARW*072DAS4, ARW*096DAS4, ARW*121DAS4 10.42
ARW*144DAS4, ARW*192DAS4 11.66
37 Total WSU FACTORY Refrigerant Charge (Sum of factory refrigerant charges for all WSUs in the system)
38 TOTAL SYSTEM CHARGE
Sum of Additional Refrigerant Charge Required (line 35) and Total WSU Factory Refrigerant Charge (line 37)

INTRODUCTION |9
Introduction
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Multi V S System R410A Refrigerant Charge Calculator (lbs.)
REFRIGERANT CHARGE WORKSHEET
1CF (Ref.) = Correction Factor for Refrigerant Charge. 2For refrigerant charge purposes, consider only the liquid line; ignore the vapor line(s).
System Tag or ID:
Job Name: __________________________________________
Project Manager: ____________________________________ Date: ______________
Line # Description Chassis I.D. Size Quantity CF (Ref.)1Total (lbs.)
1 Linear feet of 1/4" liquid line tubing2— — 0.015
2 Linear feet of 3/8" liquid line tubing2— — 0.041
3 Linear feet of 1/2" liquid line tubing2— — 0.079
4 Linear feet of 5/8" liquid line tubing2— — 0.116
5 Linear feet of 3/4" liquid line tubing2— — 0.179
6 Linear feet of 7/8" liquid line tubing2— — 0.238
7 Linear feet of 1" liquid line tubing2— — 0.323
8 Standard + Art Cool Mirror SJ, SK 5k to 15k 0.53
9 Standard + Art Cool Mirror SJ, SK 18k to 24k 0.62
10 Standard SV 30k to 36k 1.01
11 Art Cool Gallery SF 9k to 12k 0.22
12 1-Way Cassette TU 7k to 12k 0.44
13 1-Way Cassette TT 18k to 24k 0.64
14 2-Way Cassette TS 18k to 24k 0.75
15 4-Way 2' x 2' Cassette TR 5k to 7k 0.40
16 4-Way 2' x 2' Cassette TR 9k to 12k 0.55
17 4-Way 2' x 2' Cassette TQ 15k to 18k 0.71
18 4-Way 3' x 3' Cassette TN 7k to 24k 0.88
19 4-Way 3' x 3' Cassette TM 28k to 36k 1.08
20 4-Way 3’ x 3’ Cassette TM 42k to 48k 1.41
21 High Static Ducted BH 7k to 24k 0.57
22 High Static Ducted M2 7k to 24k 0.77
23 High Static Ducted M2 28k to 42k 1.15
24 High Static Ducted M3 28k to 54k 1.35
25 High Static Ducted B8 36k to 96k 2.20
26 Low Static Ducted, Low Static Ducted Bottom Return L1 5k to 9k 0.31
27 Low Static Ducted, Low Static Ducted Bottom Return L2 12k to 18k 0.42
28 Low Static Ducted, Low Static Ducted Bottom Return L3 21k to 24k 0.55
29 Vertical / Horizontal Air Handling Unit NJ 12k to 30k 1.04
30 Vertical / Horizontal Air Handling Unit NJ 36k 1.57
31 Vertical / Horizontal Air Handling Unit NK 42k to 54k 2.00
32 Floor Standing CE (U) 7k to 15k 0.37
33 Floor Standing CF (U) 18k to 24k 0.82
34 HRU: PRHR022A/023A, 032A/ 033A, 042A/ 043A, 063A, 083A — — 1.1
35 ADDITIONAL Refrigerant Charge Required (Sum of lines 1 – 34)
36 Total ODU FACTORY Refrigerant Charge
(Choose One)
36A ARUN024GSS4 0
36B ARUN038GSS4 0
36C ARUN048GSS4 0
36D ARUN053GSS4 0
36F ARUN060GSS4 0
36G ARUB060GSS4 0
37 TOTAL SYSTEM CHARGE
Sum of Additional Refrigerant Charge Required (line 35) and Total ODU Factory Refrigerant Charge (from lines 36A through 36G)

ART COOLTM GALLERY
Mechanical Specifications on page 11
General Data on page 12
Electrical Data on page 13
External Dimensions on page 14
Electrical Wiring Diagram on page 15
Refrigerant Flow Diagrams on page 16
Acoustic Data on page 17
Air Velocity / Temperature Distribution on page 19
Capacity Tables on page 20

ART COOLTM | 11
Art CoolTM Gallery
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
ART COOLTM GALLERY
Mechanical Specications
Casing
Units are designed to mount on a vertical surface and come com-
plete with an installation mounting guide and a separate hanging
bracket. The unit case is manufactured with coated metal. Cold
surfaces are covered with a coated polystyrene insulating material.
Finish
The unit case has a light gray / silver matte finish. The front surface
of the unit has a flat glass panel and frame that can accommodate a
20″ x 20″ photograph, picture or artwork.
Fan Assembly and Control
The indoor unit has a single, direct-drive, turbo fan. The fan wheel
is made of high strength ABS HT-700 polymeric resin. The fan motor
is a Brushless Digitally Controlled (BLDC) design with permanently
lubricated and sealed ball bearings. The fan motor includes thermal,
overcurrent and low RPM protection. The fan/motor assembly is
mounted on vibration attenuating rubber grommets. The fan impeller
is statically and dynamically balanced. The fan speed is controlled
using a microprocessor-based, direct digital control algorithm that
provides a high fan speed in cooling thermal ON and low fan speed
in cooling thermal OFF, high fan speed in heating thermal ON and
fan off in heating thermal OFF. The fan speeds can be field adjusted
between low, medium, and high speeds. The fan speed algorithm
provides a field selectable, fixed-speed or auto-speed setting that
adjusts the fan speed to simulate natural airflow.
Air Filter
Return air is filtered with a removable, washable filter with anti-fun-
gal treatment. Filter access is from the front of the unit without the
use of tools.
Airflow Guide Vanes
The indoor unit is provided with motorized sweeping guide vanes
that automatically change the direction of airflow from side-to-side
and up-and-down.
Microprocessor Control
The unit is provided with an integrated microprocessor controller ca-
pable of performing functions necessary to operate the system with-
out the use of a wall-mounted controller. A temperature thermistor is
factory mounted in the return air stream. All unit operation param-
eters, excluding the operating schedule, are stored in non-volatile
memory resident on the unit microprocessor. Operating schedules
are stored in select models of the optional, wall-mounted, local or
central controllers. The field-supplied communication cable between
the indoor unit(s) and outdoor unit is to be a minimum of 18 AWG,
2 conductor, stranded, and shielded cable (RS-485), terminated via
screw terminals on the control boards. The microprocessor control
provides the following functions: auto addressing, self-diagnostics,
auto restart following power restoration, test run, and will operate the
indoor unit using one of five operation modes:
1. Auto Changeover (Heat Recovery only)
2. Heating
3. Cooling
4. Dry
5. Fan Only
For Heat Recovery systems the Auto Changeover setting automati-
cally switches control of the indoor unit between Cooling and Heating
modes based on space temperature conditions. For Heat Pump
systems, heated or cooled air delivery
is dependent upon outdoor unit
operating mode.
In Heating mode, the microprocessor
control will activate indoor unit opera-
tion when the indoor room temperature
falls below set-point temperature.
At which point, a signal is sent to
the outdoor unit to begin the heating
cycle. The indoor unit fan operation
is delayed until coil pipe temperature
reaches 76°F. Significant airflow is
generated when pipe temperature
reaches 80°F. A field-selectable option maintains fan operation for
30 minutes following cooling cycle operations. The unit is equipped
with an infrared receiver designed to communicate with an LG
wireless remote controller. In lieu of wireless remote or factory return
air thermistor, screw terminals on the microprocessor circuit board
accommodate various models of wall-mounted local controllers.
The unit microprocessor is capable of accepting space temperature
readings concurrently or individually from either:
1. Wall-mounted wired controller(s)
2. Factory-mounted return air thermistor
A single indoor unit has the capability of being controlled by up to
two local wired controllers. The microprocessor controls space tem-
perature using the value provided by the temperature sensor sensing
a space temperature that is farthest away from the temperature
set-point. The microprocessor control provides a cooling or heating
mode test cycle that operates the unit for eighteen (18) minutes
without regard to the space temperature. If the system is provided
with an optional wall-mounted local or central controller, displayed di-
agnostic codes are specific, alpha-numeric, and provide the service
technician with a reason for the code displayed.
Handling Condensate
The unit is designed for gravity draining of condensate. LG provides
a factory insulated flexible drain hose. If condensate lift/pumps are
needed for the application, they are to be field provided.
Condensate Drain Pan
The condensate drain pan is constructed of expandable polystyrene
resin (EPS).
Coil
The indoor unit coil is constructed with grooved design copper tubes
with slit coil fins, two (2) rows, eighteen (18) fins per inch.
Controls Features
• Auto changeover (Heat
Recovery only)
• Auto operation
• Auto clean (coil dry; requires
wireless controller)
• External on/off control
• Dual thermistor control
• Dual setpoint control*
• Filter life and power consump-
tion display*
• Group control
• Forced operation
• Hot start
• Self diagnostics
• Timer (on/off)
• Weekly schedule
• Auto direction/swing (up/down)
• Fan speed control
• Jet cool (fast cooling)
*To enable Generation 4 features,
outdoor unit DIP Switch No. 3
must be set to ON. Please refer
to the Multi V 5, Multi V IV, Multi
V Water IV, Multi V S Engineering
Manual for additional information.

12 |ART COOLTM
MULTI V Wall-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
ART COOL GALLERY
General Data
Table 1: Art Cool Gallery (SF Frames) Indoor Unit General Data.
Model No. ARNU093SFA4 ARNU123SFA4
Cooling Mode Performance
Capacity (Btu/h) 9,600 12,300
Power Input1(W) 35 35
H/M/L Power Input at Factory Default (W) 28 /16 / 10 32 / 20 /12
Heating Mode Performance
Capacity (Btu/h) 10,900 13,600
Power Input1(W) 35 35
H/M/L Power Input at Factory Default (W) 28 /16 / 10 32 / 20 /12
Entering Mixed Air
Cooling Max (°F WB)276 76
Heating Min (°F DB)259 59
Unit Data
Refrigerant Type3R410A R410A
Refrigerant Control EEV EEV
Sound Pressure4dB(A) (H/M/L) 38 / 32 / 27 44 / 38 / 32
Net Unit Weight (lbs.) 33.1 33.1
Shipping Weight (lbs.) 38.1 38.1
Communication Cable5 (No. x AWG) 2 x 18 2 x 18
Fan
Type Turbo Fan Turbo Fan
Quantity 1 1
Motor/Drive Brushless Digitally Controlled / Direct
Airflow Rate H/M/L (CFM) 286 / 222 / 148 328 / 272 / 212
Piping
Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare
Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare
Condensate Line (in., I.D.) 5/8 5/8
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.
All capacities are net with a combination ratio between 95-105%.
Rated capacity is certified under AHRI Standard 1230. Ratings are subject to change
without notice. Current certified ratings are available at www.ahridirectory.org.
1Max. power input is rated at maximum setting value.
2Low ambient performance with LGRED° heat technology is included in Multi V 5 Air
Source Units produced after February 2019.
3Take 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.
4Sound Pressure levels are tested in an anechoic chamber under ISO Standard 3745.
5All 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.

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Electrical Data
Model Number Voltage
Range MCA MOP Rated Amps (A)
Power Supply Power Input (W)
Hz Volts Phase Max.
Cooling
Max.
Heating
H / M/ L at
Factory Default
SF Frames
ARNU093SFA4 187-253 0.4 15 0.3 60 208-230 1 35 35 28 /16 / 10
ARNU123SFA4 0.4 15 0.3 35 35 32 / 20 /12
Table 2: Art Cool Gallery Wall-Mounted Indoor Unit Electrical Data.
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 the circuit breaker.
Max. power input is rated at maximum setting value.

14 |ART COOLTM
MULTI V Wall-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
External Dimensions
Figure 3: ARNU093SFA4 and ARNU123SFA4 Dimensions.
SF Frame
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Piping Access Hole
Attachment Hole
Attachment Hole
23-5/8 5-3/4
19-11/16
20-11/16
Air Outlet Grille
Air Outlet Grille
Air Outlet Grille
Air Inlet Grille
23-5/8
Unit: inches
Note: All measurements
have a tolerance of 1/4 in.

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© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Electrical Wiring Diagram
SF Frame
Figure 4: ARNU093SFA4 and ARNU123SFA4 Wiring Diagram.
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PCB Connection Purpose Function
CN-TH3 Pipe out thermistor Pipe out thermistor connection
CN-TH2 Pipe in thermistor Pipe in thermistor connection
CN-TH1 Return air thermistor Return air thermistor connection
CN-UD Step motor Step motor output
CN-LR1 Step motor Step motor output
CN-LR2 Step motor Step motor output
CN-REMO Wired remote controller Wired remote controller connection
CN-EEV EEV output EEV control output
CN-EXT1 External on/off controller External on/off controller connection
CN-CC Dry contact Dry contact connection
CN-485 Communication Connection between indoor and outdoor units
Table 3: SF Frame Wiring Diagram Legend.
*To enable Generation 4 features, outdoor unit DIP switch no. 3 must be set to ON. Please refer to the Multi V 5, Multi V IV, Multi V Water IV, Multi V
S
Engineering Manual for additional information.

16 |ART COOLTM
MULTI V Wall-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
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Refrigerant Flow Diagram
Figure 5: SF Frame Piping Diagram.
Thermistor Description
TH1 Return air thermistor
TH2 Pipe in thermistor
TH3 Pipe out thermistor
Table 4: SF Frame Refrigerant Pipe Connection Port Diameters.
Table 5: SF Frame Thermistors.
SF Frame
Model Liquid (inch) Vapor (inch)
SF Frames
ARNU093SFA4 1/4 Flare 1/2 Flare
ARNU123SFA4 1/4 Flare 1/2 Flare
Strainer
Strainer

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Acoustic Data
Sound Pressure Levels
• Measurements are taken 3.3 ft away from the front of the unit.
• Sound pressure levels are measured in dB(A) with a tolerance of ±3.
• Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745.
Operating Conditions:
• Power source: 220V/60 Hz
• Sound level will vary depending on a range of factors including the construction
(acoustic absorption coefficient) of a particular room in which the unit was installed.
Figure 6: Sound Pressure Measurement Location.
Table 6: Art Cool Gallery Indoor Unit Sound Pressure Levels.
Figure 7: ARNU093SFA4 and ARNU123SFA4 Sound Pressure Level Diagrams.
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Sound Pressure Levels dB(A)
Model High Fan Speed Medium Fan Speed Low Fan Speed
SF Frames
ARNU093SFA4 38.0 32.0 27.0
ARNU123SFA4 44.0 38.0 32.0
ARNU093SFA4 ARNU123SFA4
2.6ft
3.3ft
Microphone

18 |ART COOLTM
MULTI V Wall-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Acoustic Data
Sound Power Levels
ART COOL GALLERY
• Data is valid under diffuse field conditions.
• Data is valid under nominal operating conditions.
• Sound power level is measured using rated conditions, and tested in a
reverberation room per ISO 3741 standards.
• Sound level will vary depending on a range of factors such as con-
struction (acoustic absorption coefficient) of particular area in which
the equipment is installed.
• Reference acoustic intensity: 0dB = 10E-6μW/m2
Table 7: Art Cool Gallery Indoor Unit Sound Power Levels.
Model Sound Power Levels dB(A)
High Fan Speed
SF Frames
ARNU093SFA4 48.0
ARNU123SFA4 54.0
Figure 8: ARNU093SFA4 and ARNU123SFA4 Sound Power Level Diagrams.
ARNU093SFA4 ARNU123SFA4

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Air Velocity / Temperature Distribution
ARNU093SFA4, ARNU123SFA4
Figure 9: ARNU093SFA4.
Figure 10: ARNU123SFA4.
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Cooling
Discharge angle: 40°
Heating
Discharge angle: 50°
0.5(1.6) 1.0(3.3)
1.5(4.9)
2.0(6.6)
17(62.6)
19(66.2)
15(59)
11(51.8)
13(55.4)
Air velocity (m/s [ft./s])
Temperature (°C [°F])
2.7m (8.9 ft.)
2m (6.6 ft.)
1m (3.3 ft.)
0m (0)
5m (16.4 ft.) 4m (13.1 ft.) 3m (9.8 ft.) 2m (6.6 ft.) 1m (3.3 ft.) 0m (0)
2.7m (8.9 ft.)
2m (6.6 ft.)
1m (3.3 ft.)
0m (0)
5m (16.4 ft.) 4m (13.1 ft.) 3m (9.8 ft.) 2m (6.6 ft.) 1m (3.3 ft.) 0m (0)
0.5(1.6) 1.0(3.3)
1.5(4.9)
2.0(6.6)
33(91.4) 37(98.6)
35(95)
39(102.2)
41(105.8)
43(109.4)
Air velocity (m/s [ft./s])
Temperature (°C [°F])
2.7m (8.9 ft.)
2m (6.6 ft.)
1m (3.3 ft.)
0m (0)
5m (16.4 ft.) 4m (13.1 ft.) 3m (9.8 ft.) 2m (6.6 ft.) 1m (3.3 ft.) 0m (0)
2.7m (8.9 ft.)
2m (6.6 ft.)
1m (3.3 ft.)
0m (0)
5m (16.4 ft.) 4m (13.1 ft.) 3m (9.8 ft.) 2m (6.6 ft.) 1m (3.3 ft.) 0m (0)
Cooling
Discharge angle: 40°
35(95)
33(91.4) 37(98.6) 39(102.2)
41(105.8)
43(109.4)
45(113)
0.5(1.6) 1.0(3.3)
1.5(4.9)
2.0(6.6)
2.5(8.2)
Air velocity (m/s [ft./s])
Temperature (°C [°F])
2.7m (8.9 ft.)
2m (6.6 ft.)
1m (3.3 ft.)
0m (0)
5m (16.4 ft.) 4m (13.1 ft.) 3m (9.8 ft.) 2m (6.6 ft.) 1m (3.3 ft.) 0m (0)
2.7m (8.9 ft.)
2m (6.6 ft.)
1m (3.3 ft.)
0m (0)
5m (16.4 ft.) 4m (13.1 ft.) 3m (9.8 ft.) 2m (6.6 ft.) 1m (3.3 ft.) 0m (0)
Heating
Discharge angle: 50°
0.5(1.6) 1.0(3.3)
1.5(4.9)
2.0(6.6)
19(66.2) 17(62.6)
15(59)
13(55.4)
11(51.8)
Air velocity (m/s [ft./s])
Temperature (°C [°F])
2.7m (8.9 ft.)
2m (6.6 ft.)
1m (3.3 ft.)
0m (0)
5m (16.4 ft.) 4m (13.1 ft.) 3m (9.8 ft.) 2m (6.6 ft.) 1m (3.3 ft.) 0m (0)
2.7m (8.9 ft.)
2m (6.6 ft.)
1m (3.3 ft.)
0m (0)
5m (16.4 ft.) 4m (13.1 ft.) 3m (9.8 ft.) 2m (6.6 ft.) 1m (3.3 ft.) 0m (0)

20 |ART COOLTM
MULTI V Wall-Mounted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
© LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Cooling Capacity Tables
Table 8: ARNU093SFA4 Cooling Capacity Table.
ARNU093SFA4
ART COOL GALLERY
Model No. /
Capacity Index
Outdoor
Air
Temp.
(°F DB)
Indoor Air Temperature (°F DB / WB)
68 / 57 73 / 61 79 / 64 80 / 67 85 / 70 88 / 73 91 / 76
TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC
ARNU093SFA4/
9.6
-9.9 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
-5 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
0 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
56.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
10 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
14 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
20 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
23 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
25 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
30 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
35 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
40 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
45 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
50 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
55 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.4 7.3
60 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.3 7.3
65 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 12.1 7.2
70 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 11.9 7.1
75 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.4 7.3 11.6 6.9
80 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.8 7.4 11.1 7.3 11.3 6.9
85 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.6 7.3 10.8 7.0 11.0 6.6
90 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.5 7.2 10.6 6.9 10.8 6.5
95 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.3 7.2 10.5 6.8 10.6 6.4
100 6.3 5.3 7.7 6.1 8.6 6.5 9.6 6.9 10.1 7.1 10.3 6.7 10.5 6.4
105 6.3 5.3 7.3 5.8 8.2 6.2 9.2 6.6 9.6 6.6 9.9 6.5 10.2 6.2
110 6.2 5.1 6.9 5.5 7.7 5.8 8.6 6.2 9.0 6.2 9.4 6.2 9.8 6.0
115 6.0 5.0 6.6 5.2 7.2 5.4 8.1 5.9 8.5 5.9 8.9 5.9 9.4 5.8
118 5.9 4.8 6.2 4.9 6.9 5.1 7.8 5.6 8.1 5.6 8.5 5.6 9.0 5.6
122 5.7 4.7 5.9 4.7 6.5 4.8 7.4 5.3 7.7 5.3 8.1 5.3 8.7 5.3
Low ambient performance with LGRED° heat technology is included in Multi V 5 Air Source Units produced after February 2019.
TC: Total Capacity (MBh); SHC: Sensible Heat Capacity (MBh).
Cooling range with the Low Ambient Baffle Kit (sold separately) installed on the outdoor
unit(s) is -9.9°F to +122°F, and is achieved only when all indoor units are operating in
cooling mode. Does not impact heat recovery system synchronous operating range.
The System Combination Ratio must be between 50–130%.
Rated capacity is certified under AHRI Standard 1230. Ratings are subject to change
without notice.
Current certified ratings are available at www.ahridirectory.org.
For outdoor unit performance data, see the respective outdoor unit performance data
manuals on https://lghvac.com/commercial.