LG Multi V ARNU18GTQB4 User manual

Ceiling Cassette
Original instruction
INSTALLATION MANUAL
AIR
CONDITIONER
www.lg.com
MFL68686515
Rev.08_071222
Copyright © 2017 - 2022 LG Electronics Inc. All Rights Reserved.
Please read this installation manual completely before installing the product.
Please retain this installation manual for future reference after reading it thoroughly.
РУССКИЙ ЯЗЫК
УКРАÏНСЬКА
ҚАЗАҚ ТІЛІ
БЕЛАРУСКАЯ МОВА
OʻZBEK TILI
BAHASA INDONESIA
Tiếng Việt TÜRKÇE
ENGLISH ITALIANO ESPAÑOL
FRANÇAIS
DEUTSCH
ΕΛΛΗΝΙΚΆ
ČEŠTINA
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ

2Indoor Unit
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
TABLE OF CONTENTS

Installation Manual 3
Installation Parts
ENGLISH
Air filter
Air
Intake
Air Outlet Wired Remote Controller
(Accessory)
Air
Intake
Air Outlet Wired Remote Controller
(Accessory)
Air filter
Wired Remote Controller
(Accessory) Wired Remote Controller (Accessory)
Air
Intake Air
Intake
Air Outlet
Air Outlet
Air Outlet
Air Intake
Wired Remote Controller
(Accessory)
Air filter
Air
Intake
Wired Remote Controller
(Accessory)
Air filter
Air Outlet
Installation Parts
Name
Quantity
Shape
Clamp metal
2 EA
Drain hose
1 EA
for gas pipe
for liquid pipe
Insulation for
fitting
1 SET
8 EA
Washer for
hanging Bracket Clamp
(Tie Wrap)
4 EA
• Screws for fixing panels are attached to decoration panel.
Installation Tool

4Indoor Unit
Safety Instructions
Safety Instructions
The following symbols are displayed on indoor and outdoor units.
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.
WARNING
!
Read the precautions in
this manual carefully
before operating the unit.
This appliance is filled
with flammable refrigerant
(for R32)
This symbol indicates that
the Operation Manual
should be read carefully.
This symbol indicates that
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.
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.
!
!
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.
!

Installation Manual 5
Safety Instructions
ENGLISH
• 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.

6Indoor Unit
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 Install 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.
• The appliance shall be installed in accordance with the
national wiring regulation.
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.

Installation Manual 7
Safety Instructions
ENGLISH
• 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.

8Indoor Unit
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.
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.
CAUTION
!

Installation Manual 9
Safety Instructions
ENGLISH
• 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.

10 Indoor Unit
Safety Instructions
• Do not install the unit in potentially explosive atmospheres.
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.