LG ARNU07GTRB4 INSTALLATION INSTRUCTIONS

INSTALLATION MANUAL

AIR

РУССКИЙ ЯЗЫК

ENGLISH

ITALIANO ESPAÑOL

УКРАÏНСЬКА

ҚАЗАҚ ТІЛІ

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
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

MFL68686515

Rev.01_101419

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

www.lg.com

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

Table of contents

TABLE OF CONTENTS

3 INSTALLATION PARTS

4 SAFETY INSTRUCTIONS

12 INSTALLATION

12 Selection of the best location

14 Ceiling dimension and hanging bolt location

17 Wiring Connection

20 Installation of Decoration Panel (4 WAY)

21 Installation of Decoration Panel (2 WAY)

22 Installation of Decoration Panel (1 WAY)

23 Drain Piping

24 Ceiling Height Selection

25 DIP Switch Setting

26 Group Control Setting

31 Model Designation

31 Airborne Noise Emission

31 Limiting concentration

2 Indoor Unit

Installation Parts

Air Outlet

Air Outlet

Anti-bacteria filter

Air

Intake

Wired Remote Controller(Accessory)

Anti-bacteria filter

Air Intake

Wired Remote Controller

(Accessory)

Installation Parts

ENGLISH

Air Outlet

Air Outlet

Air

Intake

Wired Remote Controller

(Accessory)

Installation Tool

Name

Quantity

Shape

Drain hose

1 EA

Clamp metal

2 EA

• Screws for fixing panels are attached to decoration panel.

Washer for

hanging backet

8 EA

Clamp

(Tie Wrap)

4 EA

Air

Intake

Insulation for

fitting

1 SET

for gas pipe

for liquid pipe

Wired Remote Controller

(Accessory)

(Other)

• manual

Installation Manual 3

Safety Instructions

Safety Instructions

The following symbols are displayed on indoor and outdoor units.

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

This appliance is filled
with flammable refrigerant
(for R32)

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

a service personnel

should be handling this

equipment with reference

to the Installation Manual.

The following safety guidelines are intended to prevent
unforeseen risks or damage from unsafe or incorrect
operation of the appliance.

The guidelines are separated into ‘WARNING’ and
‘CAUTION’ as described below.

This symbol is displayed to indicate matters and

!

operations that can cause risk.
Read the part with this symbol carefully and follow the
instructions in order to avoid risk.

!

WARNING

This indicates that the failure to follow the instructions can
cause serious injury or death.

!

CAUTION

This indicates that the failure to follow the instructions can
cause the minor injury or damage to the product.

!

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.

4 Indoor Unit

Safety Instructions

• 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.

• 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.

ENGLISH

Installation Manual 5

Safety Instructions

• 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.

• 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.

6 Indoor Unit

Safety Instructions

• 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.

ENGLISH

Installation Manual 7

Safety Instructions

• 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.

• 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
re-fabricated. (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.

8 Indoor Unit

Safety Instructions

• 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.

• Any person who is involved with working on or breaking into
a refrigerant circuit should hold a current valid certificate
from an industry-accredited 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.

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

ENGLISH

Installation Manual 9

Safety Instructions

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.

• 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.

10 Indoor Unit

Safety Instructions

• 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)

• 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.

ENGLISH

Installation Manual 11

Installation

Annexed sheet

Or

Packing corrugated

cardboard on the

bottom

Installation

Read completely, then follow step by step.

Selection of the best location

• If the temperature might rise above 30 ℃ or the humidity might rise above RH 80 %, attach the
Dew-Protective kit or use another insulation to the indoor body.
h Dew Protective kit is sold separately.

Use glass wool material or polyethylene foam and make sure at least 10 mm thick.

• 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.

2, 1 WAY

4 WAY

Ceiling

Ceiling Board

500 or

more

1 000

or more

Above 1 800

3 000 or less

Floor

Ceiling Board

300 or more

500 or

more

300 or less

Unit:mm

Ceiling

Ceiling Board

500 or

more

1 000

or more

Above 2 500

4 000 or less

Floor

Ceiling Board

300 or more

500 or

more

300 or less

Unit:mm

1 WAY 2 WAY

!

CAUTION

20 ±3

21±3

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.

h Please use an annexed sheet or the corrugated

cardboard on the bottom of packing as
installation sheet.

h When using the bottom sheet, please use it after

separating the installation sheet from packing of
the product floor by using a knife etc as a picture
below.

12 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

Floor location

2

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 13

Installation

Unit:mm

TM/TN/TP/TM-A/TP-B Chassis

875(Ceiling opening)

787(Hanging bolt)

684

(Hanging bolt)

671

875

(Ceiling opening)

840 Unit size

840 Unit size

Unit:mm

TQ/TR Chassis

585~660(Ceiling opening)

517

461

517

585~660(Ceiling opening)

523

570

570

319

Ceiling board

Level gauge

Ceiling

(Unit: mm)

TT Chassis

TU Chassis

1 285(Hanging bolt)

1 385(Ceiling opening)

50

250

600

50

466

(Ceiling opening)

1 180

448

600

250

965(Hanging bolt)

1 065(Ceiling opening)

50

50

860

448

306

400 4040

400 4040

306

354

(Hanging bolt)

466

(Ceiling opening)

354

(Hanging bolt)

410(Hanging bolt)

600

116

642 (Ceiling opening)

unit: mm

1 033 (Ceiling opening)

855 (Hanging bolt)

830

60

Ceiling dimension and hanging bolt location

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

4 WAY

2 WAY

1 WAY

14 Indoor Unit

Installation

!

CAUTION

• This air-conditioner uses a drain pump.

• Install the unit horizontally using a level
gauge.

• During the installation, care should be taken

• 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.

not to damage electric wires.

NOTICE

• 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.

ENGLISH

Installation Manual 15

Installation

Ceiling board

Hanging bolt

(W3/8 or M10)

(W3/8 or M10)

Nut

Flat washer for M10

(accessory)

Flat washer for M10

(accessory)
Nut
(W3/8 or M10)

• The following parts are local purchasing.

① Hanging Bolt - W 3/8 or M10
② Nut - W 3/8 or M10
③ Spring Washer - M10
④ Plate Washer - M10

4 WAY

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

2 WAY

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

1 WAY

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

Ceiling board

Ceiling board

Adjust the

same height

Ceiling board

Ceiling

Air Conditioner body

Keep the length of 15 mm(TM,TN,TP
chassis), 31~34 mm(TQ,TR chassis)
between the air conditioner bottom
surface and the ceiling surface

Paper model
for installation

Paper pattern
for installation

Set screw of
paper model (4 pieces)

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

Ceiling

Air Conditioner body

Ceiling

Air conditioner body

105 mm(TM,TN,TP chassis),
180 mm(TQ,TR chassis)

Ceiling board

Ceiling board

Ceiling board

Set screw of
paper pattern (4 pieces)

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

Ceiling board

90 mm

70 mm

16 Indoor Unit

Paper model
for installation

Adjust the same height

Set screw of
paper model (4 pieces)

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

Installation

Power supply cord

Transmission cord
Remote controller cord

Power supply cord

Transmission cord

Remote
controller cord

Power supply cord
Transmission cord

Remote
controller cord

!

CAUTION

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

•

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)

Wiring Connection

4 WAY

• Connect the wires to the terminals on the control box 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.

<TM/TN/TP> < TM-A/TP-B >

• While connecting wired remote controller, insertits connector to the "CN-REMO" housing of the main PCBA
and make the remote controller cord tightly by using clamp cord.

<TM/TN/TP> < TM-A/TP-B >

ENGLISH

(CN-REMO)

Clamp CordRemote Controller Connector

(CN-REMO)

Clamp CordRemote Controller Connector

Installation Manual 17

Installation

• TQ/TR Chassis

• TM/TN/TP Chassis

COMMUNICATION LINE(IDU-ODU)

Terminal Block

Indoor

L(L1) N(L2)

INDOOR

POWER INPUT

ABA - - --BAB

GND 12 VDRY2DRY1INTERNET

Terminal Block of outdoor unit

IDUSODU

Outdoor
Unit

Terminal Block

Indoor

L(L3) N(L4)

TO AIR

FRESH KIT

Terminal Block

Indoor

AB

INDOOR

POWER INPUT

Terminal Block Indoor

1(L) 2(N) 3 4

INDOOR

POWER INPUT

A----BABAB

GND 12 V

DRY2DRY1

INTERNET

Terminal Block of outdoor unit

IDUSODU

Outdoor
Unit

• TM-A/TP-B(*B4)

COMMUNICATION LINE(IDU-ODU)

Terminal Block

Indoor

L(L1)

N(L2)

ABA - - --B--

--

GND 12 VDRY2DRY1

Terminal Block of outdoor unit

IDUSODU

Outdoor
Unit

Terminal Block

Indoor

3(A) 4(B)

• TM-A(*A4)

COMMUNICATION LINE(IDU-ODU)

Terminal Block

Indoor

L(L1)

N(L2)

INDOOR

POWER INPUT

ABA - - --B--

--

GND 12 VDRY2DRY1

Terminal Block of outdoor unit

IDUSODU

Outdoor
Unit

Terminal Block

Indoor

Terminal Block

Indoor

3(A) 4(B)

4 WAY

2 WAY

INDOOR POWER INPUT

※ Resistance measurement position for incorrect wiring.

• Communication and Power Cable

1. Communication Cable : CVV-SB 1.0~1.5x2C

2. Power Cable : H07RN-F 1.5x3C

Terminal Block

Indoor

Terminal

Block

Indoor

1(L) 2(N) 3 4

Terminal Block of outdoor unit

SODU IDU INTERNET DRY1 DRY2 GND 12 V

BA

B

A B A - - - -

Outdoor unit

1 WAY

18 Indoor Unit

Terminal Block Indoor

1(L) 2(N) 3 4

INDOOR

POWER INPUT

Terminal Block of outdoor unit

IDUSODU

A ----BABAB

INTERNET

DRY2DRY1

GND 12 V

Outdoor
Unit

Installation

!

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.

ENGLISH

HAND OVER

Teach the customer the operation and maintenance procedures, using the operation manual.
(air filter cleaning, temperature control, etc.)

Installation Manual 19

Installation

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

Inlet GrilleInlet GrilleInlet Grille

Installation of Decoration Panel (4 WAY)

The decoration panel has its installation
direction.

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

1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by
amount 10 mm in length.)
The fixing screws (hexagon M5 screw) are included the indoor unit box.

2. Remove the air inlet grille from the decoration panel. (Remove the hook for the air inlet grille cord.)

3. Hook the decoration panel key hole ( ) on the screws fixed in step above, and slide the panel so
that the screws reach the key hole edge.

4. Retighten completely two temporarily fixed screws and other two screws. (Total 4 screws)

5. Connect the louver motor connector and display connector.

6. After tightening these screws, install the air inlet grille (including the air filter).

Piping side

Air conditioner unit

Decoration panel fixing screws
(hexagon M5 screws)
Temporally fitting at 2 places
(Tightening about 10 mm)

Decoration panel

Control box cover

Louver motor

Display
Lead wire for

louver motor and
display

!

CAUTION

Install certainly the
decoration panel.
Cool air leakage causes
sweating.
 Water drops fall.

20 Indoor Unit

Decoration panel fixing screws
(Hexagon M5 screw)

Installation of Decoration Panel (2 WAY)

Installation

ENGLISH

The decoration panel has its
installation direction.

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

1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body.
(Tighten by amount 10 mm in length.) The fixing screws (hexagon M5 screw) are
included the indoor unit box.
Remove the air inlet grille from the decoration panel. (Remove the hook for the air inlet grille cord.)

2.

3. Hook the decoration panel key hole ( ) on the screws fixed in step above, and slide
the panel so that the screws reach the key hole edge.
Retighten completely two temporarily fixed screws and other two screws. (Total 4 screws)

4.

5. Connect the louver motor connector and display connector.

6. After tightening these screws, install the air inlet grille (including the air filter).

Air conditioner unit

Decorative panel

Louver motor

Decorative panel fixing screws
(hexagon M5 screws)
Temporary fitting at 2 poles
(Tightening about 10 mm)

Decorative panel
fixing screws
(Hexagon M4 screw)

Piping side

Control box cover

Display

Lead wire for louver motor
and display

!

CAUTION

Install certainly the
decoration panel.
Cool air leakage causes
sweating.
 Water drops fall.

Inlet Grille

Good example Bad example

Air conditioner

Decoration panel

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

unit

Ceiling

board

Cool air leakage

(no good)

Air conditioner
unit

Ceiling

board

Decoration panel

Installation Manual 21

Installation

Installation of Decoration Panel (1 WAY)

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)

Decorative panel

Air outlet vane

Air inlet panel

Side cover

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

Side cover

Decorative panel

Air outlet vane

CAUTION

!

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

22 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

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

Air inlet grille

Air conditioner unit

Air

Cool air leakage

(no good)

Ceiling

board

Decoration
panel

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

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.

Installation

ENGLISH

!

CAUTION

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

Installation Manual 23

Installation

1/50~1/100

MAX 700 mm

Elbow

Drain pump

Unit

Drain pipe
(Local supply)

Thermal insulator

(Local supply)

Attention

1. Possible drain-head height is up to 700 mm. So, it
must be installed below 700 mm.

2. Keep the drain hose downward up to 1/50~1/100
inclination.
Prevent any upward flow or reverse flow in any
part.

3. 5 mm or thicker formed thermal insulator is
provided for the drain pipe.

4. Upward routing is not allowed.

5. Be sure to check the drain pump for normal
operation and abnormal noise when electrical
wiring is complete.

Ceiling Height Selection

The ceiling type indoor unit is available to adjust indoor airflow rate by Installer setting of the wired remote
controller for better service. Please select the height level from the below table.

4 WAY

<Ceiling Height Selection Table>

Ceiling Height

1.6~8.3 kW 10.0~14.5 kW

Up to 2.3 m Up to 2.7 m Low Decrease the indoor airflow rate 1 step from standard level

Above 2.3 m, up to 2.7 m Above 2.7 m, up to 3.2 m Standard Set the indoor airflow rate as standard level

Above 2.7 m, up to 3.1 m Above 3.2 m, up to 3.6 m High Increase indoor airflow rate 1 step from standard level

Above 3.1 m, up to 3.6 m Above 3.6 m, up to 4.2 m Super high Increase indoor airflow rate 2 steps from standard level

Ceiling height of ‘Very high’ function may not exist depending on the indoor unit.
For the details, refer to the product manual.

24 Indoor Unit

Selection

Level

Description

Installation

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

Selection of Manual or Auto

Continuous operation Removall

-

-

Master

Wired/Wireless remote

controller

operation Mode

-

Linkage Removal

Up side + Down side Vane

General model

-

-

-

Slave

Auto

-

-

Working

Up side Vane

Only

Tropical model

-

Off

Off

Off

Off

Off

Off

Off

Off

ENGLISH

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 25

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.

26 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

LGAP Network System

or

Installation

ENGLISH

Master

Master

Donʼt connect serial 12 V line

Display

Error Message

MasterMaster

Slave

Slave

GND
Signal
12 V

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 27

Installation

3. Group Control 3

n Mixture connection with indoor units and Fresh Air Intake Unit

LGAP Network System

or

FAU

Master

Master

FAU

Slave

Display Error Message

Master

N

Master

Display Error Message

Slave

GND
Signal
12 V

M

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

Standard Standard

FAU FAU

Standard Standard

FAU

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

28 Indoor Unit

4. 2 Remote Control

n Wired remote controller 2 + Indoor unit 1

or

LGAP Network System

Installation

ENGLISH

GND
Signal
12 V

Master

Master

Display

Error Message

Slave

Slave

Slave

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 29

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

h

PZCWRCG3 cable used for connection

h

PZCWRC2 cable used for connection

PZCWRCG3

Master

Slave

PZCWRC2

Master Slave

Master

!

CAUTION

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

30 Indoor Unit

ARN U G48 CTM 4

Serial Number

Chassis Name
4 WAY : TM, TN, TP, TQ, TR

2 WAT : TL, TS
1 WAY : TT, TU

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)

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 31

3

)

ENGLISH

32 Indoor Unit