LG ARNU18GTTD4 INSTALLATION INSTRUCTIONS

INSTALLATION MANUAL

AIR

РУССКИЙ ЯЗЫК

ENGLISH

УКРАÏНСЬКА

ITALIANO

ҚАЗАҚ ТІЛІ

ESPAÑOL

БЕЛАРУСКАЯ МОВА

FRANÇAIS DEUTSCH

OʻZBEK TILI

CONDITIONER

Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring standards by
authorized personnel only.
Please retain this installation manual for future reference after reading it thoroughly.

CEILING CASSETTE - 1 WAY

Original instruction
[Representative] LG Electronics Inc. EU Representative : LG Electronics European Shared

Service Center B.V. Krijgsman 1, 1186 DM Amstelveen, The Netherlands

[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu,

Changwon-si, Gyeongsangnam-do, KOREA

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

MFL68686521

Rev.00_052219

www.lg.com

Copyright © 2017 - 2019 LG Electronics Inc. All Rights Reserved.

Table of Contents

TABLE OF CONTENTS

3 INSTALLATION PARTS

4 SAFETY PRECAUTIONS

10 INSTALLATION

10 Selection of the Best Location

12 Ceiling Dimension and Hanging Bolt Location

13 Wiring Connection

14 Installation of Decoration Panel (Panel Type)

15 Installation of Decoration Panel (Grille Type)

16 Drain Piping

17 DIP Switch Setting

18 Group Control Setting

23 Model Designation

23 Airborne Noise Emission

23 Limiting concentration

2 Indoor Unit

Installation Parts

Panel type Grille type

Air Intake

Installation Parts

ENGLISH

Air Outlet

Air Outlet

Installation Tool

Name

Quantity

Shape

Drain hose

1 EA

Name

Quantity

Shape

Air

Intake

Wired Remote Controller

Clamp metal

2 EA

Paper pattern for installation

(Accessory)

Washer for

hanging bracket

1 EA

8 EA

Air

Intake

Plastic band

4 EA

Installation and Owner's manual

Wired Remote Controller

Insulation for

for gas pipe

for liquid pipe

1 EA

(Accessory)

fitting

1 SET

• Screws for fixing panels are attached to decoration panel.

Installation Manual 3

Safety Precautions

Safety Precautions

The following symbols are displayed on indoor and outdoor units.

Read the precautions in this manual
carefully before operating the unit.

This symbol indicates that the Operation
Manual should be read carefully.

To prevent injury to the user or other people and property damage, the following instructions must be
followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

This appliance is filled with flammable
refrigerant (R32)

This symbol indicates that a service
personnel should be handling this
equipment with reference to the
Installation Manual.

!

WARNING

!

CAUTION

n Meanings of symbols used in this manual are as shown below.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

Be sure not to do.

Be sure to follow the instruction.

!

WARNING

Installation

• Compliance with national gas regulations shall be observed.

• Do not use a defective or underrated circuit breaker. Use this appliance
on a dedicated circuit.

- There is risk of fire or electric shock.

• For electrical work, contact the dealer, seller, a qualified electrician, or
an Authorized Service Center.

- Do not disassemble or repair the product. There is risk of fire or

electric shock.

• Always ground the product.

- There is risk of fire or electric shock.

• Install the panel and the cover of control box securely.

- There is risk of fire or electric shock.

• Always install a dedicated circuit and breaker.

- Improper wiring or installation may cause fire or electric shock.

• Use the correctly rated breaker or fuse.

- There is risk of fire or electric shock.

• Do not modify or extend the power cable.

- There is risk of fire or electric shock.

4 Indoor Unit

Safety Precautions

ENGLISH

• Do not install, remove, or re-install the unit by yourself (customer).

- There is risk of fire, electric shock, explosion, or injury.

• Be cautious when unpacking and installing the product.

- Sharp edges could cause injury. Be especially careful of the case

edges and the fins on the condenser and evaporator.

• For installation, always contact the dealer or an Authorized Service
Center.

- There is risk of fire, electric shock, explosion, or injury.

• Do not install the product on a defective installation stand.

- It may cause injury, accident, or damage to the product.

• Be sure the installation area does not deteriorate with age.

- If the base collapses, the air conditioner could fall with it, causing

property damage, product failure, and personal injury.

• Do not turn on the breaker or power under condition that front panel,
cabinet, top cover, control box cover are removed or opened.

- Otherwise, it may cause fire, electric shock, explosion or death.

• Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or
air purge. Do not compress air or Oxygen and Do not use Flammable
gases. Otherwise, it may cause fire or explosion.

- There is the risk of death, injury, fire or explosion.

•

Have all electric work done by a licensed electrician according to "Electric
Facility Engineering Standard" and "Interior Wire Regulations" and the
instructions given in this manual and always use a special circuit.

- If the power source capacity is inadequate or electric work is

performed improperly, electric shock or fire may result.

• Always intstall a dedicated circuit and breaker.

- Improper wiring or installation may cause fire or electric shock.

• The appliance shall be stored in a well-ventilated area where the room
size corresponds to the room area as specified for operation. (for R32)

• The appliance shall be stored in a room without continuously operating
ignition sources (for example: open flames, an operating gas appliance
or an operating electric heater.)

• Keep any required ventilation openings clear of obstruction.

• Mechanical connections shall be accessible for maintenance purposes.

• To prevent the mixing of different types of refrigerants, be sure to check
the type of refrigerant used in the outdoor unit.

Operation

• Do not let the air conditioner run for a long time when the humidity is
very high and a door or a window is left open.

- Moisture may condense and wet or damage furniture.

Installation Manual 5

Safety Precautions

• Take care to ensure that power cable could not be pulled out or
damaged during operation.

- There is risk of fire or electric shock.

• Do not place anything on the power cable.

- There is risk of fire or electric shock.

• Do not plug or unplug the power supply plug during operation.

- There is risk of fire or electric shock.

• Do not touch(operate) the product with wet hands.

- There is risk of fire or electrical shock.

• Do not place a heater or other appliances near the power cable.

- There is risk of fire and electric shock.

• Do not allow water to run into electric parts.

- There is risk of fire, failure of the product, or electric shock.

• Do not store or use flammable gas or combustibles near the product.

- There is risk of fire or failure of product.

• Do not use the product in a tightly closed space for a long time.

- Oxygen deficiency could occur.

• When flammable gas leaks, turn off the gas and open a window for
ventilation before turn the product on.

- Do not use the telephone or turn switches on or off. There is risk of

explosion or fire.

• If strange sounds, smell or smoke comes from product. Turn the
breaker off or disconnect the power supply cable.

- There is risk of electric shock or fire.

• Stop operation and close the window in storm or hurricane.
If possible, remove the product from the window before the hurricane
arrives.

- There is risk of property damage, failure of product, or electric shock.

• Do not open the inlet grill of the product during operation.
(Do not touch the electrostatic filter, if the unit is so equipped.)

- There is risk of physical injury, electric shock, or product failure.

• When the product is soaked (flooded or submerged), contact an
Authorized Service Center.

- There is risk of fire or electric shock.

• Be cautious that water could not enter the product.

- There is risk of fire, electric shock, or product damage.

• Ventilate the product from time to time when operating it together with a
stove, etc.

- There is risk of fire or electric shock.

• Turn the main power off when cleaning or maintaining the product.

- There is risk of electric shock.

6 Indoor Unit

Safety Precautions

ENGLISH

• When the product is not be used for a long time, disconnect the power
supply plug or turn off the breaker.

- There is risk of product damage or failure, or unintended operation.

• Take care to ensure that nobody could step on or fall onto the outdoor
unit.

- This could result in personal injury and product damage.

• When mechanical connectors are reused indoors, sealing parts shall
be renewed. (for R32)

• When flared joints are reused indoors, the flare part shall be re­fabricated. (for R32)

• Periodic ( more than once/year ) cleaning of the dust or salt particles
stuck on the heat exchanger by using water.

• Do not use means to accelerate the defrosting process or to clean,
other than those recommended by the manufacturer.

• Do not pierce or burn refrigerant cycle part.

• Be aware that refrigerants may not contain an odour.

!

CAUTION

Installation

• Always check for gas (refrigerant) leakage after installation or repair of
product.

- Low refrigerant levels may cause failure of product.

• Install the drain hose to ensure that water is drained away properly.

- A bad connection may cause water leakage.

• Keep level even when installing the product.

- To avoid vibration or water leakage.

• Do not install the product where the noise or hot air from the outdoor
unit could damage the neighborhoods.

- It may cause a problem for your neighbors.

• Use two or more people to lift and transport the product.

- Avoid personal injury.

• Do not install the product where it will be exposed to sea wind (salt
spray) directly.

- It may cause corrosion on the product. Corrosion, particularly on the

condenser and evaporator fins, could cause product malfunction or
inefficient operation.

Installation Manual 7

Safety Precautions

• Any person who is involved with working on or breaking into a
refrigerant circuit should hold a current valid certificate from an industry­accredited assessment authority, which authorises their competence to
handle refrigerants safely in accordance with an industry recognised
assessment specification. (for R32)

• The appliance shall be stored so as to prevent mechanical damage
from occurring.

• Refrigerant tubing shall be protected or enclosed to avoid damage.

• Flexible refrigerant connectors (such as connecting lines between the
indoor and outdoor unit) that may be displaced during normal
operations shall be protected against mechanical damage.

• The installation of pipe-work shall be kept to a minimum.

• Pipe-work shall be protected from physical damage.

• A brazed, welded, or mechanical connection shall be made before
opening the valves to permit refrigerant to flow between the
refrigerating system parts.

• Dismantling the unit, treatment of the refrigerant oil and eventual parts
should be done in accordance with local and national standards.

Operation

• Do not expose the skin directly to cool air for long periods of time.
(Don't sit in the draft.)

- This could harm to your health.

• Do not use the product for special purposes, such as preserving foods,
works of art, etc. It is a consumer air conditioner, not a precision
refrigeration system.

- There is risk of damage or loss of property.

• Do not block the inlet or outlet of air flow.

- It may cause product failure.

• Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.

- There is risk of fire, electric shock, or damage to the plastic parts of

the product.

• Do not touch the metal parts of the product when removing the air filter.
They are very sharp!

- There is risk of personal injury.

• Do not step on or put anything on the product. (outdoor units)

- There is risk of personal injury and failure of product.

• Always insert the filter securely. Clean the filter every two weeks or
more often if necessary.

- A dirty filter reduces the efficiency of the air conditioner and could

cause product malfunction or damage.

8 Indoor Unit

Safety Precautions

ENGLISH

• Do not insert hands or other objects through the air inlet or outlet while
the product is operated.

- There are sharp and moving parts that could cause personal injury.

• Do not drink the water drained from the product.

- It is not sanitary and could cause serious health issues.

• Use a firm stool or ladder when cleaning or maintaining the product.

- Be careful and avoid personal injury.

• Replace the all batteries in the remote control with new ones of the
same type. Do not mix old and new batteries or different types of
batteries.

- There is risk of fire or explosion.

• Do not recharge or disassemble the batteries. Do not dispose of
batteries in a fire.

- They may burn or explode.

• If the liquid from the batteries gets onto your skin or clothes, wash it
well with clean water. Do not use the remote if the batteries have
leaked.

- The chemicals in batteries could cause burns or other health hazards.

• If you eat the liquid from the batteries, brush your teeth and see doctor.
Do not use the remote if the batteries have leaked.

- The chemicals in batteries could cause burns or other health hazards.

• Servicing shall only be performed as recommended by the equipment
manufacturer. Maintenance and repair requiring the assistance of other
skilled personnel shall be carried out under the supervision of the
person competent in the use of flammable refrigerants. (for R32)

• Means for disconnection must be incorporated in the fixed wiring in
accordance with the wiring rules.

• If the supply cord is damaged, it must be replaced by the manufacturer,
its service agent or similarly qualified persons in order to avoid a
hazard.

Installation Manual 9

Installation

Floor

Installation

Read completely, then follow step by step.

Selection of the Best Location

• There should not be any heat source or steam near the unit.

• There should not be any obstacles to the air circulation.

• A place where air circulation in the room will be good.

• A place where drainage can be easily obtained.

• A place where noise prevention is taken into consideration.

• Do not install the unit near the door way.

• Ensure the spaces indicated by arrows from the wall, ceiling, or other obstacles.

• The indoor unit must have the maintenance space.

20 ±3

CAUTION

!

Ceiling

Ceiling board

500 or
more

1 000

or more

10 or more

Above 1 800

3 300 or less

Floor

Floor

Ceiling board

200 or more

500 or
more

300 or less

Unit:mm

In case that the unit is installed near the sea, the installation parts may be corroded by
salt. The installation parts (and the unit) should be taken appropriate anti-corrosion
measures.

NOTE

• Avoid the following installation location.

1. Such places as restaurants and kitchen where considerable amount of oil steam and flour is generated.
These may cause heat exchange efficiency reduction, or water drops, drain pump mal-function.
In these cases, take the following actions;

• Make sure that ventilation fan is enough to cover all noxious gases from this place.

• Ensure enough distance from the cooking room to install the air conditioner in such a place where it may
not suck oily steam.

2. Avoid installng air conditioner in such
places where cooking oil or iron powder is
generated.

3. Avoid places where inflammable gas is
generated.

4. Avoid place where noxious gas is
generated.

5. Avoid places near high frequency
generators.

Air conditioner

Take enough
distance

Cooking table

Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.

10 Indoor Unit

Installation

Minimum floor area

(for R32)

- The appliance shall be installed, operated and stored in a room with a floor area larger than the
minimum area.

- Use the graph of table to determine the minimum area.

ENGLISH

Amin (m2)

- m : Total refrigerant amount in the system

- Total refrigerant amount : factory refrigerant charge + additional refrigerant amount

- Amin : minimum area for installation

600

500

400

300

200

100

0

Floor location

m (kg) Amin (m

< 1.224

1.224

12.9

1.4 16.82

1.6 21.97

1.8 27.80

2 34.32

2.2 41.53

2.4 49.42

2.6 58.00

2.8 67.27

3 77.22

3.2 87.86

3.4 99.19

3.6 111.20

3.8 123.90

4 137.29

4.2 151.36

4.4 166.12

0 1.224 2 3 4 5 6 7 8

2

)

-

Floor location

m (kg) Amin (m

4.6 181.56

4.8 197.70

5 214.51

5.2 232.02

5.4 250.21

5.6 269.09

5.8 288.65

6 308.90

6.2 329.84

6.4 351.46

6.6 373.77

6.8 396.76

7 420.45

7.2 444.81

7.4 469.87

7.6 495.61

7.8 522.04

2

)

Wall mounted

m (kg) Amin (m

< 1.224

1.224

1.43

1.4 1.87

1.6 2.44

1.8 3.09

2 3.81

2.2 4.61

2.4 5.49

2.6 6.44

2.8 7.47

3 8.58

3.2 9.76

3.4 11.02

3.6 12.36

3.8 13.77

4 15.25

4.2 16.82

4.4 18.46

2

)

-

Wall mounted

m (kg) Amin (m

4.6 20.17

4.8 21.97

5 23.83

5.2 25.78

5.4 27.80

5.6 29.90

5.8 32.07

6 34.32

6.2 36.65

6.4 39.05

6.6 41.53

6.8 44.08

7 46.72

7.2 49.42

7.4 52.21

7.6 55.07

7.8 58.00

2

)

Ceiling Mounted

m (kg) Amin (m

< 1.224

1.224

0.956

1.4 1.25

1.6 1.63

1.8 2.07

2 2.55

2.2 3.09

2.4 3.68

2.6 4.31

2.8 5.00

3 5.74

3.2 6.54

3.4 7.38

3.6 8.27

3.8 9.22

4 10.21

4.2 11.26

4.4 12.36

2

)

-

Floor standing

Wall mounted

Ceiling mounted

m (kg)

Ceiling Mounted

m (kg) Amin (m

4.6 13.50

4.8 14.70

5 15.96

5.2 17.26

5.4 18.61

5.6 20.01

5.8 21.47

6 22.98

6.2 24.53

6.4 26.14

6.6 27.80

6.8 29.51

7 31.27

7.2 33.09

7.4 34.95

7.6 36.86

7.8 38.83

2

)

Installation Manual 11

Installation

Ceiling Dimension and Hanging Bolt Location

• The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions.

1 385(Ceiling opening)

1 285(Hanging bolt)

50

Ceiling

600

50

Level gauge

CAUTION

!

• This air-conditioner uses a drain pump.

• Install the unit horizontally using a level
gauge.

• During the installation, care should be
taken not to damage electric wires.

• Select and mark the position for fixing bolts
and piping hole.

• Decide the position for fixing bolts slightly
tilted to the drain direction after considering
the direction of drain hose.

• Drill the hole for anchor bolt on the wall.

Hanging bolt

(W3/8 or M10)

Nut

(W3/8 or M10)
Spring washer

(M10)

Keep the length of the bolt
from the bracket to 40 mm

Flat washer for M10
(accessory)

Flat washer for M10

(accessory)
Nut
(W3/8 or M10)

Ceiling board

306

400 4040

600

400 4040

306

250

Paper model
for installation

Adjust the same height

1 180

250

TT Chassis

1 065(Ceiling opening)

965(Hanging bolt)

50

860

TU Chassis

Ceiling

Air conditioner body

Set screw of
paper model (4 pieces)

Open the ceiling board
along the outer edge of the
paper model

448

448

354

50

354

(Unit: mm)

Ceiling board

Ceiling board

466

(Hanging bolt)

(Ceiling opening)

466

(Hanging bolt)

(Ceiling opening)

70 mm

• The following parts are local purchasing.

• The following parts are local purchasing.

① Hanging bolt - W 3/8 or M10

① Hanging bolt - W 3/8 or M10

② Nut - W 3/8 or M10

② Nut - W 3/8 or M10

③ Spring washer - M10

③ Spring washer - M10

④ Plate washer - M10

④ Plate washer - M10

CAUTION

!

CAUTION

!

Tighten the nut and bolt to prevent unit
from falling off.

• When mechanical connectors are reused indoors, sealing parts shall be renewed. (for R32)

• When flared joints are reused indoors, the flare part shall be re-fabricated. (for R32)

12 Indoor Unit

Installation

ENGLISH

Wiring Connection

• Connect the wires to the terminals on the control board individually according to the outdoor unit
connection.

• Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor
unit respectively.

Terminal Block Indoor

1(L) 2(N) 3 4

INDOOR

POWER INPUT

WARNING

!

Make sure that the screws of the terminal are free from looseness.

CAUTION

!

The Power cord connected to the unit should be selected according to the following
specifications.

CAUTION

!

After the confirmation of the above conditions, prepare the wiring as follows:

1) Never fail to have separate power specially for the air conditioner. As for the method of
wiring, follow the circuit diagram pasted on the inside of control box cover.

2) Provide a circuit breaker switch between power source and the unit.

3) The screw which fasten the wiring in the casing of electrical fittings are liable to come
loose from vibrations to which the unit is subjected during the course of transportation.
Check them and make sure that they are all tightly fastened. (If they are loose, it could give
rise to burn-out of the wires.)

4) Confirm the Specification of power source

5) Confirm that electrical capacity is sufficient.

6) Be sure that the starting voltage is maintained at more than 90 % of the rated voltage
marked on the name plate.

7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)

8) Do not install the leakage breaker in a place which is wet or moist.
Water or moist may cause short circuit.

9) The following troubles would be caused by voltage drop-down.

• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance
to the normal function of a overload protection device.

• Proper starting power is not given to the compressor.

Terminal Block of outdoor unit

INTERNET

IDUSODU

A ----BABAB

DRY2DRY1

GND 12 V

Outdoor
Unit

Installation Manual 13

Installation

Installation of Decoration Panel (Panel Type)

The decoration panel has its installation
direction.

Before installing the decoration panel,
always remove the paper template.

1. Open the air outlet vane, and extract side covers.

2. Remove the air inlet panel from the decoration panel.

3.

Hook decoration panel to indoor unit, using hooks attached at the backside of both side of decoration panel.

4. Arrange wires not to get caught between decoration panel and indoor unit.

5. Screw 7 fixing screws. (7, 9, 12 kBtu : 6 screws)

6. Connect the vane motor connector ,display connector and air inlet panel connector.

7. Install the air inlet panel (including the air filter) and side covers.

Air conditioner unit

Mesh

Control box cover

Plasma filter
(applied only to plasma model)

Air inlet panel

Side cover

Decorative panel
fixing screws
(hexagon M6 screws)
(tightening about 20 mm)

Decorative panel

Air outlet vane

CAUTION

!

Install certainly the
decoration panel.
Cool air leakage
causes sweating.
 Waterdrops fall.

14 Indoor Unit

Good example

Fit the insulator (this part) and
be careful for cool air leakage

Bad example

Air conditioner
unit

Ceiling

board

Decoration panel

Air

Air conditioner unit

Cool air leakage

(no good)

Ceiling

board

Decoration
panel

Air conditioner
unit

Ceiling

board

Decoration panel

Decoration
panel

Fit the insulator (this part) and
be careful for cool air leakage

Good example

Air

Cool air leakage

(no good)

Bad example

Ceiling

board

Air conditioner unit

Installation of Decoration Panel (Grille Type)

Installation

ENGLISH

The decoration panel has its installation
direction.

Before installing the decoration panel,
always remove the paper template.

1. Open the air outlet vane, and extract side covers.

2. Remove the air inlet grille from the decoration panel.

3.

Hook decoration panel to indoor unit, using hooks attached at the backside of both side of decoration panel.

4. Arrange wires not to get caught between decoration panel and indoor unit.

5. Screw 7 fixing screws. (7, 9, 12 kBtu : 6 screws)

6. Connect the vane motor connector and display connector. (Plasma connector for plasma model)

7. Install the air inlet grille (including the air filter) and side covers.

Air conditioner unit

Mesh

Control box cover

Side cover

Plasma filter
(applied only to plasma model)

Decorative panel
fixing screws
(hexagon M6 screws)
(tightening about 20 mm)

Air inlet grille

Decorative panel

Air outlet vane

CAUTION

!

Install certainly the
decoration panel.
Cool air leakage
causes sweating.
 Waterdrops fall.

Installation Manual 15

Maintenance
drain port

Upward
routing
not allowed

Pipe clamp

Indoor unit

1/50~1/100

Max 700 mm

Feed water

Drain pump

Drain pan

Flexible drain hose
(accessory)

Main
drain pipe

Glue the joint

Drain
port

Drain hose connection
Use the clip (accessory)

1/50~1/100 slope

Hanger

distance

Hanger bracket

Max 700 mm

Flexible drain hose

Insulation

Metal
clamp

Max 300 mm

1~15 m

Installation

Drain Piping

• Drain piping must have down-slope (1/50 to 1/100): be sure not to
provide up-and-down slope to prevent reversal flow.

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

• The outside diameter of the drain connection on the indoor unit is
32 mm.

Piping material: Polyvinyl chloride pipe VP-25 and
pipe fittings.

Be sure to install heat insulation on the drain piping.

•

Heat insulation material: Polyethylene foam with
thickness more than 8 mm.

Drain Test

The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:

• Connect the main drain pipe to the exterior
and leave it provisionally until the test
comes to an end.

• Feed water to the flexible drain hose and
check the piping for leakage.

• Be sure to check the drain pump for normal
operating and noise when electrical wiring
is complete.

• When the test is complete, connect the
flexible drain hose to the drain port on the
indoor unit.

CAUTION

!

The supplied flexible drain hose should
not be curved, neither screwed.
The curved or screwed hose may cause a
leakage of water.

16 Indoor Unit

DIP Switch Setting

1. Indoor Unit

Function Description Setting Off Setting On Default

Communication

SW1

Cycle

SW2

Group Control

SW3

Dry Contact Mode

SW4

Installation

SW5

Heater linkage

SW6

Ventilator linkage

SW7

Vane selection
(Console)

Region selection

Etc.

SW8

CAUTION

!

For Multi V Models, DIP switch 1, 2, 6, 8 must be set OFF.

N/A (Default)

N/A (Default)

Selection of Master or Slave

Selection of Dry Contact
Mode

Fan continuous operation

N/A

Selection of Ventilator
linkage

Selection of up/down side
Vane

Selection tropical region

Spare

-

-

Master

Wired/Wireless remote

controller

Selection of Manual or Auto

operation Mode

Continuous operation Removall

-

Linkage Removal

Up side + Down side Vane

General model

-

Up side Vane

Tropical model

-

-

Slave

Auto

-

-

Working

Only

-

Installation

ENGLISH

Off

Off

Off

Off

Off

Off

Off

Off

2. Outdoor Unit

In case that the products meet specific conditions, “Auto addressing” function can start automatically
with the improved speed by turning the DIP switch #3 of the outdoor unit and resetting the power.

* Specific conditions:

- All names of the indoor units are ARNU****4.

- The serial number of Multi V super IV (outdoor units) is after October 2013.

DIP switch 7 segment

Outdoor Unit PCB Outdoor Unit DIP Switch

Installation Manual 17

Installation

Group Control Setting

1. Group Control 1

n Wired remote controller 1 + Standard Indoor Units

or

Master Slave Slave Slave

LGAP Network System

GND
Signal
12 V

Display Error Message

Master

Only connect serial signal and

GND lines between indoor units.

n DIP Switch in PCB

¿ Master Setting

- No. 3 Off

¡ Slave Setting

- No. 3 On

Indoor Unit DIP Switch

Some products have no DIP switch on PCB. It is possible to set indoor units to Master or Slave by
using the wireless remote controller instead of DIP switch.
For the details of the setting, please refer to the manual of the wireless remote controller.

1. It is possible to 16 indoor units(Max.) by one wired remote controller.

Set only one indoor unit to Master, set the others to Slave.

2. It is possible to connect with every type of indoor units.

3. It is possible to use wireless remote controller at the same time.

4. It is possible to connect with Dry Contact and Central controller at the same time.

- The Master indoor unit is possible to recognize Dry Contact and Central Controller only.

5. In case that any error occurs at indoor unit, the error code is displayed on the wired remote
controller.

It is possible to control the other indoor units except the error units.

18 Indoor Unit

h It is possible to connect indoor units since Feb. 2009.
h It can be the cause of malfuctions when there is no setting of master and slave.

h In case of Group Control, it is possible to use following functions.

- Selection of operation, stop or mode

- Temperature setting and room temperature check

- Current time change

- Control of flow rate (High/Middle/Low)

- Reservation settings
It is not possible to use some functions.

2. Group Control 2

n Wired remote controllers + Standard Indoor Units

Installation

ENGLISH

LGAP Network System

Slave

GND
Signal
12 V

Master

Donʼt connect serial 12 V line

Display Error Message

MasterMaster

Master

or

Slave

h It is possible to control 16 indoor units(Max.) with the master wired remote control.
h Other than those, it is same with the Group Control 1.

Installation Manual 19

Installation

3. Group Control 3

n Mixture connection with indoor units and Fresh Air Intake Unit

LGAP Network System

Slave

Display Error Message

GND
Signal
12 V

M

FAU

Master

Master

FAU

Slave

Display Error Message

or

Master

N

Master

h In case of connecting with standard indoor unit and Fresh Air Intake Unit, separate Fresh

Air Intake Unit with standard units. (N, M ≤ 16) (Because setting temperature are different.)

h Other than those, it is same with Group Control 1.

FAU

FAU FAU

Standard Standard

Standard

FAU

Standard

20 Indoor Unit

* FAU : Fresh Air Intake Unit
Standard: Standard Indoor Unit

4. 2 Remote Control

n Wired remote controller 2 + Indoor unit 1

Installation

ENGLISH

LGAP Network System

Slave

GND
Signal
12 V

Master

Master

Display Error Message

Slave

Slave

or

Slave

1. It is possible to connect two wired remote controllers (Max.) with one indoor unit.

Set only one indoor unit to Master, set the others to Slave.
Set only one wired remote controller to Master, set the others to Slave.

2. Every types of indoor unit is possible to connect two remote controller.

3. It is possible to use wireless remote controller at the same time.

4. It is possible to connect with Dry Contact and Central controller at the same time.

5. In case that any error occurs at indoor unit, the error code is displayed on the wired
remote controller.

6. There isnʼt limits of indoor unit function.

Installation Manual 21

Installation

5. Accessories for group control setting

It is possible to set group control by using below accessories.

Indoor unit 2 EA + Wired remote controller

h

PZCWRCG3 cable used for connection

Master

PZCWRCG3

Master

CAUTION

!

1 EA Indoor unit 1 EA + Wired remote controller 2 EA

h

PZCWRC2 cable used for connection

Slave

PZCWRC2

Master Slave

• Apply totally enclosed noncombustible conduit in case of local building code Requiring
plenum cable usage.

22 Indoor Unit

ARN U G24 DTT 4

Serial Number

Chassis Name
Electrical Ratings

1 : 1Ø, 115 V, 60 Hz
6 : 1Ø, 220 - 240 V, 50 Hz
3 : 1Ø, 208/230 V, 60 Hz

2 : 1Ø, 220 V, 60 Hz
7 : 1Ø, 100 V, 50/60 Hz
G :

1Ø, 220 - 240 V, 50 Hz/1Ø, 220 V, 60 Hz

Total Cooling Capacity in Btu/h
EX) 5 000 Btu/h ➝ '05' 18 000 Btu/h ➝ '18'

Combination of Inverter Type and Cooling Only or Heat Pump
N : AC Inverter and H/P V : AC Inverter and C/O
U : DC Inverter and H/P and C/O

System with Indoor Unit using R32/R410A

❈ LGETA : U Ex) URN

Combinations of functions
A/B : Basic function L : Neo Plasma(Wall Mounted)
C/D : Plasma(Ceiling Cassette)
G : Low Static K : High Sensible Heat
U : Floor Standing without Case
SE/S8 - R : Mirror V : Silver B : Blue(ART COOL Type Panel Clolr)
SF - E : Red V : Silver G : Gold 1 : Kiss (Photo changeable)
Q : Console Z : Fresh Air Intake Unit

Model Designation

Airborne Noise Emission

The A-weighted sound pressure emitted by this product is below 70 dB.
** The noise level can vary depending on the site.

The figures quoted are emission level and are not necessarily safe working levels. Whilst there is a
correlation between the emission and exposure levels, this cannot be used reliably to determine
whether or not further precautions are required. Factor that influence the actual level of exposure of the
workforce include the characteristics of the work room and the other sources of noise, i.e. the number
of equipment and other adjacent processes and the length of time for which an operator exposed to the
noise. Also, the permissible exposure level can vary from country to country. This information, however,
will enable the user of the equipment to make a better evaluation of the hazard and risk.

Limiting concentration

Limiting concentration is the limit of Freon gas concentration where immediate measures can be
taken without hurting human body when refrigerant leaks in the air. The limiting concentration shall
be described in the unit of kg/m

n Calculate refrigerant concentration

Refrigerant concentration =

Installation

3

(Freon gas weight per unit air volume) for facilitating calculation

Limiting concentration: 0.44 kg/m3(R410A)

Total amount of replenished refrigerant in refrigerant facility (kg)

Capacity of smallest room where indoor unit is installed (m

Installation Manual 23

3

)

ENGLISH

24 Indoor Unit