LG ARNU073TUC4 User manual

CEILING CASSETTE INDOOR UNIT
INSTALLATION MANUAL
4-Way 3’ x 3’ Models:
• ARNU243TPC4
• ARNU283TPC4
• ARNU363TNC4
• ARNU423TMC4
• ARNU483TMC4
1-Way Models:
• ARNU073TUC4
• ARNU093TUC4
• ARNU123TUC4
• ARNU183TTC4
• ARNU243TTC4
4-Way 2’ x 2’ Models:
• ARNU053TRC4
• ARNU073TRC4
• ARNU093TRC4
• ARNU123TRC4
• ARNU153TQC4
• ARNU183TQC4
2-Way Models:
• ARNU183TLC4
• ARNU243TLC4

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-CeilingCassette-01-15

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...................................................................................................................................................... 7
Ceiling Cassette Indoor Units....................................................................................................................................... 7
Safety ........................................................................................................................................................................... 7
Required Tools (eld provided) ..................................................................................................................................... 7
Required Parts (eld provided)..................................................................................................................................... 7
Unit Nomenclature........................................................................................................................................... 9
R410A Refrigerant......................................................................................................................................... 10
General Data ................................................................................................................................................. 11
Specications ............................................................................................................................................................. 12
Dimensions ................................................................................................................................................................ 15
Electrical Data ............................................................................................................................................................ 25
Refrigerant Piping Diagrams ...................................................................................................................................... 26
General Installation Guidelines...................................................................................................................... 27
Location Selection ...................................................................................................................................................... 27
Required Clearances.................................................................................................................................................. 27
Inspection ................................................................................................................................................................... 28
Unpack and Inspect for Freight Damage.................................................................................................................... 28
Installation ..................................................................................................................................................... 29
Install Cassette Chassis ............................................................................................................................................. 29
Refrigerant Piping.......................................................................................................................................... 31
Refrigerant Safety....................................................................................................................................................... 33
Refrigerant Pipe Connections..................................................................................................................................... 34
Insulate Refrigerant Pipes .......................................................................................................................................... 34
Wiring ............................................................................................................................................................ 35
4-Way Cassette Chassis ............................................................................................................................................ 35
4-Way Cassette TR, TQ Chassis................................................................................................................................ 36
4-Way Cassette TP, TN, TM Chassis.......................................................................................................................... 38
2-Way Cassette TL Chassis ....................................................................................................................................... 40
1-Way Cassette TT, TU Chassis................................................................................................................................. 43
Optional Wall-Mounted Sensor and Controller ........................................................................................................... 46
Wall-Mounted Sensor Installation............................................................................................................................... 46
Wall-Mounted Controller Installation........................................................................................................................... 46
Install Decoration Panel................................................................................................................................. 47
4-Way Cassette .......................................................................................................................................................... 47
2-Way Cassette .......................................................................................................................................................... 48
1-Way Cassette .......................................................................................................................................................... 49
Drain Pipe Installation.................................................................................................................................... 50
Install the Condensation Drain Pipe ........................................................................................................................... 50
Controls Setup............................................................................................................................................... 51
Installation Checklist...................................................................................................................................... 55

4
Multi V Ceiling Cassette 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 an
authorized 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 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 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 pip 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 preserv-
ing 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 location where no one can step on
or fall onto it. Do not install the unit with defective hanging,
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 system
and authorization to do so has been obtained from the com-
missioning agent.
There is a risk of refrigerant contamination, refrigerant loss and equip-
ment damage.

6
Multi V Ceiling Cassette 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.
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 communica-
tions 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 electrostatic 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.
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
with the unit is plugged in. Do not touch the electrostatic
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.
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.
CAUTION
To avoid physical injury, use caution when cleaning or
servicing the air conditioner.

8
Multi V Ceiling Cassette 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.

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.
INTRODUCTION
Ceiling Cassette Indoor Units
This manual describes how to install the LG Electronics, Inc. 4-Way,
2-Way, and 1-Way Ceiling Cassette indoor units (IDU) for Multi V
Variable Refrigerant Flow (VRF) heat pump and heat recovery sys-
tems. 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 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.
• Connecting cable (power and control)
• Pipes - vapor line and liquid line, with insulation
• 3/8” or 1/2” Threaded hanger rods
• 3/8” or 1/2” nuts, at washers, and lock/split washers
• Insulated drain hose
• Additional drain hose
• 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
WARNING
Installation work must be performed by trained, authorized 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 and can prevent proper operation of the unit.
Note:
Please read all instructions before installing this product. Become familiar
with the unit, it’s components and connections, and the order of installa-
tion. Incorrect installation can degrade or prevent proper operation.
Figure 1: 4-Way TQ, TR, TM, TN, TP Chassis
Filter
Supply Air
Return Air
Wired
Remote Controller
(Optional)
TEMP
Figure 2: 2-Way TL Chassis
Filter
Return Air
Supply Air
RemoteCont rolle r
TEMP
Wired Remote Controller (Optional)
Figure 3: 1-Way TU, TT Chassis
Wired Remote Controller (Optional)
Filter
Return Air
Supply Air
RemoteController
TEMP
Required Tools (field provided)
Required Parts (field provided)

10
Multi V Ceiling Cassette 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.
Unit Model Number
Ceiling Cassette: 4-Way (2' x 2')
ARNU053TRC4
ARNU073TRC4
ARNU093TRC4
ARNU123TRC4
ARNU153TQC4
ARNU183TQC4
Ceiling Cassette: 4-Way (3′ x 3′) ARNU243TPC4
ARNU283TPC4
ARNU363TNC4
ARNU423TMC4
ARNU483TMC4
Ceiling Cassette: 2-Way
ARNU183TLC4
ARNU243TLC4
Ceiling Cassette 1-Way ARNU073TUC4
ARNU093TUC4
ARNU123TUC4
ARNU183TTC4
ARNU243TTC4
Table 1: Multi V Cassette Indoor Units
INTRODUCTION

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.
Cassette Indoor Units Nomenclature
ARN U05 3TR C
Generation
4 = Fourth
TP = 4-Way Ceiling Cassette (3’x3’)
TN = 4-Way Ceiling Cassette (3’x3’)
TM = 4-Way Ceiling Cassette (3’x3’)
TR = 4-Way Ceiling Cassette (2’x2’)
TQ = 4-Way Ceiling Cassette (2’x2’)
TL = 2-Way Ceiling Cassette
TU = 1-Way Ceiling Cassette
TT = 1-Way Ceiling Cassette
Electrical Ratings
3 = 208–230V/60Hz/1Phase
Nominal Capacity
(Nominal cooling capacity in Btu/h)
Type
U = Inverter Heat Pump/Heat Recovery
Family
ARN = Multi V Indoor Unit (Refrigerant R410A)
4
Feature
C = Plasma Filter
05 = 5,500
07 = 7,500
09 = 9,600
12 = 12,300
15 = 15,400
18 = 19,100
24 = 24,200
28 = 28,000
36 = 36,200
42 = 42,000
48 = 48,000
UNIT NOMENCLATURE
Chassis/Model Type

12
Multi V Ceiling Cassette 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.
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
• To prevent the refrigerant cylinder from exploding, do not place it in direct sunlight.
• Do not use any piping that has not been approved for use in high-pressure refrigerant systems.
• To prevent the piping from softening, do not heat it more than necessary during installation.
• Piping wall thickness must comply with the applicable local, state, and federal codes for the 551 psi design pressure of R410A.
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.

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.
Table 2: 4-Way Cassette Indoor Units Specications
GENERAL DATA
Type
4-Way Ceiling Cassette – 2 ft x 2 ft Models – TR/TQ Chassis
ARNU053TRC4 ARNU073TRC4 ARNU093TRC4 ARNU123TRC4 ARNU153TQC4 ARNU183TQC4
Cooling Mode Performance
Capacity (Btu/h) 5,500 7,500 9,600 12,300 15,400 19,100
Power Input1(W) 30 30 30 30 30 30
Heating Mode Performance
Capacity (Btu/h) 6,100 8,500 10,900 13,600 17,100 21,500
Power Input1(W) 30 30 30 30 30 30
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
Net Unit Weight (lbs) 29 29 32 32 35 35
Shipping Weight (lbs) 34 34 38 38 40 40
Grille Weight (lbs) 777777
Grille Shipping Weight (lbs) 11 11 11 11 11 11
Communication Cable3
(No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18
Fan
Quantity 111111
Airflow Rate H/M/L (CFM) 265 / 247 / 212 265 / 247 / 212 283 / 265 / 251 307 / 283 / 247 388 / 353 / 328 396 / 388 / 353
Piping
Liquid Line (in, OD) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare
Vapor Line (in, OD) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare
Condensate Line (in, ID) 111111
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.
3All 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 com-
munications 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
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).
Specications

14
Multi V Ceiling Cassette 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
Table 2: 4-Way Cassette Indoor Units Specications – continued
Type
4-Way Ceiling Cassette – 3 ft x 3 ft Models – TP, TN, TM Chassis
ARNU243TPC4 ARNU283TPC4 ARNU363TNC4 ARNU423TMC4 ARNU483TMC4
Cooling Mode Performance
Capacity (Btu/h) 24 200 28 000 36 200 42 000 48 100
Power Input1(W) 33 33 144 144 144
Heating Mode Performance
Capacity (Btu/h) 27 300 31 500 40 600 43 800 51 200
Power Input1(W) 33 33 144 144 144
Entering Mixed Air
Cooling Max (°F WB) 76 76 76 76 76
Heating Min (°F DB) 59 59 59 59 59
Unit Data
Refrigerant Type2R410A R410A R410A R410A R410A
Refrigerant Control EEV EEV EEV EEV EEV
Net Unit Weight (lbs) 48 48 54 59 59
Shipping Weight (lbs) 58 58 64 69 69
Grille Weight (lbs) 13 13 13 13 13
Grille Shipping Weight (lbs) 20 20 20 20 20
Communication Cable3
(No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18
Fan
Quantity 11111
Airflow Rate H/M/L (CFM) 600 / 530 / 459 671 / 565 / 494 883 / 777 / 706 1059 / 918 / 812 1130 / 953 / 883
Piping
Liquid Line (in, OD) 3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare
Vapor Line (in, OD) 5/8 Flare 5/8 Flare 5/8 Flare 5/8 Flare 5/8 Flare
Condensate Line (in, ID) 11111
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.
3All 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 com-
munications 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
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).
Specications

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
Table 2: 2-Way Cassette Indoor Units Specications
Type
2-Way Ceiling Cassette – TL Chassis
ARNU183TLC4 ARNU243TLC4
Cooling Mode Performance
Capacity (Btu/h) 19,100 24,200
Power Input1(W) 144 144
Heating Mode Performance
Capacity (Btu/h) 21,500 27,300
Power Input1(W) 144 144
Entering Mixed Air
Cooling Max (°F WB) 76 76
Heating Min (°F DB) 59 59
Unit Data
Refrigerant Type2R410A R410A
Refrigerant Control EEV EEV
Net Unit Weight (lbs) 56 56
Shipping Weight (lbs) 66 66
Grille Weight (lbs) 13 13
Grille Shipping Weight (lbs) 20 20
Communication Cable3
(No. x AWG) 2 x 18 2 x 18
Fan
Quantity 1 1
Airflow Rate H/M/L (CFM) 565/530/424 742/671/600
Piping
Liquid Line (in, OD) 3/8 Flare 3/8 Flare
Vapor Line (in, OD) 5/8 Flare 5/8 Flare
Condensate Line (in, ID) 1 1
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.
3All 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 com-
munications 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
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).
Specications

16
Multi V Ceiling Cassette 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
Table 2: 1-Way Cassette Indoor Units Specications
Type
1-Way Ceiling Cassette – TU, TT Chassis
ARNU073TUC4 ARNU093TUC4 ARNU123TUC4 ARNU183TTC4 ARNU243TTC4
Cooling Mode Performance
Capacity (Btu/h) 7 500 9 600 12 300 19 100 24 200
Power Input1(W) 40 40 40 70 70
Heating Mode Performance
Capacity (Btu/h) 8 500 10 900 13 600 21 500 24 200
Power Input1(W) 40 40 40 70 70
Entering Mixed Air
Cooling Max (°F WB) 76 76 76 76 76
Heating Min (°F DB) 59 59 59 59 59
Unit Data
Refrigerant Type2R410A R410A R410A R410A R410A
Refrigerant Control EEV EEV EEV EEV EEV
Net Unit Weight (lbs) 33 33 33 42 42
Shipping Weight (lbs) 40 40 40 49 49
Grille Weight (lbs) 10 10 10 13 13
Grille Shipping Weight (lbs) 16 16 16 20 20
Communication Cable3
(No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18
Fan
Quantity 11111
Airflow Rate H/M/L (CFM) 290 / 258 / 226 325 / 304 / 290 353 / 325 / 290 470 / 427 / 385 515 / 470 / 406
Piping
Liquid Line (in, OD) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare
Vapor Line (in, OD) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare
Condensate Line (in, ID) 11111
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.
3All 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 com-
munications 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
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).
Specications

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
Dimensions – TR Chassis

18
Multi V Ceiling Cassette 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 – TQ Chassis

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 DATA
Dimensions – TP Chassis

20
Multi V Ceiling Cassette 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 – TN Chassis