LG LMN097HVT User manual

P/NO : MFL68280101
INSTALLATION MANUAL
AIR 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.
TYPE : Multi Type
http://www.lghvac.com
www.lg.com
ENGLISH FRANÇAIS ESPAÑOL

FLEX MULTI SPLIT INSTALLATION
INSTRUCTIONS

Installation Manual 3
Multi Air Conditioner Installation Manual
TABLE OF CONTENTS
Installation Parts Provided ...................................................4
Safety Precautions ................................................................5
Installation of Indoor, Outdoor Unit .....................................8
Select the best location ....................................................8
Seaside Applications and Installation ..............................10
Seasonal Wind And Cautions In Winter...........................11
Piping length and elevation .............................................12
Installation............................................................................14
Connecting the piping......................................................14
How To Fix.......................................................................18
Wiring Connection ...........................................................19
Conduit connection..........................................................19
Ceiling dimension and hanging bolt location ...................20
How to Fix .......................................................................21
Wiring Connection ...........................................................21
Conduit connection..........................................................21
Installation of Wired Remote Controller(Optional)...........22
Installation of Decorative Panel.......................................24
Drain Piping.....................................................................26
Flaring Work and Connection of Piping ............................29
Flaring work.....................................................................29
Connection of piping - Outdoor .......................................30
Installation .......................................................................33
Installation of The Main Unit............................................34
Connecting the Cable between Indoor Unit, Distributor
Unit and Outdoor Unit .........................................................35
Connect the cable to the Indoor unit. ..............................35
Connect the cable to the Distributor unit .........................36
Connect the cable to the Outdoor unit.............................37
Connection method of the connecting cable(Example)...39
Checking the Drainage, Insulating the Pipe and Special
Piping Applications .............................................................40
Checking the drainage ....................................................40
Insulating the Pipe and Special Piping Applications........40
Air Purging and Evacuation................................................41
Leak Checking.................................................................41
Evacuation.......................................................................42
Charging ...............................................................................43
Installation PI485 .................................................................45
Test Running ........................................................................46
Function................................................................................47
Dip S/W Setting ...............................................................47
Forced Cooling Operation ...............................................48
Wiring Error Check ..........................................................49
Saving Power Consumption ............................................49
Night Quiet Mode ............................................................50
Mode Lock.......................................................................51
Pcb Display(18/24k Model Only) .....................................52
Combination indoor units ...................................................53
oLevel gauge
oScrew driver
oElectric drill
oHole core drill (ø50mm)
oFlaring tool set
oSpecified torque wrenches
1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(different depending on model No.)
oAdjustable wrench
oA glass of water
oScrew driver
oHexagonal wrench(4mm)
oRefrigerant Gas Leak Detector
oVacuum pump
oGauge manifold
oOwner's manual
oThermometer
oRemote Control Holder
Installation Requirements Required Tools
ENGLISH

4Multi Air Conditioner
Installation Parts Provided
Installation Parts Provided
[Wall mounted / ART COOL Mirror]
[Ceiling Concealed Duct Type]
[Ceiling Cassette Type]
Type "A" screw Type "A" screw
Type "B" screw Type "B" screw
Remote control holderRemote control holder
Type 1 Type 2
Installation plate Installation plate
Type “A” screw Type “A” screw
Type "B" screw Type "C" screw Type "B" screw Type "C" screw
Remote control holderRemote control holder
Type 3 Type 4
Installation plate Installation plate
Name
Quantity
Shape for gas pipe
for liquid pipe
Clamp metal
1 EA
Insulation for
fitting
1 set
Clamp
8 EA
Screws for
duct flanges
1 set
Conduit Bracket
Screw(M4) 2EA
Conduit
Bracket
1 EA
Name
Quantity
Shape for gas pipe
Conduit Bracket
Screw(M4) 2EA
for liquid pipe
Clamp metal
1 EA
Insulation for Remote
control holder
fitting
1 SET 1 EA
Drain hose
1 EA
Clamp Conduit
Bracket
8 EA
Washer for
hanging backet
8 EA 1 EA

Installation Manual 5
Product Introduction
ENGLISH
hThe figure can be changed according to model.
To prevent the injury of the user or other people and property damage, the following instructions
must be followed.
nBe sure to read before installing the air conditioner.
nBe sure to observe the cautions specified here as they include important items related to safety.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
nThe meanings of the symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
WARNING
nInstallation
Be sure not to do.
Be sure to follow the instruction.
Safety Precautions
Always perform grounding.
• Otherwise, it may cause electri-
cal shock.
Donʼt use a power cord, a
plug or a loose socket which
is damaged.
• Otherwise, it may cause a fire or
electrical shock.
For installation of the product,
always contact the service cen-
ter or a professional installation
agency.
• Otherwise, it may cause a fire,
electrical shock, explosion or in-
jury.
Securely attach the electrical
part cover to the indoor unit
and the service panel to the
outdoor unit.
• If the electrical part cover of the
indoor unit and the service panel
of the outdoor unit are not at-
tached securely, it could result in
a fire or electric shock due to
dust, water, etc.
Always install an air leakage
breaker and a dedicated
switching board.
• No installation may cause a fire
and electrical shock.
Do not keep or use flammable
gases or combustibles near
the air conditioner.
• Otherwise, it may cause a fire or
the failure of product.
Ensure that an installation frame of the out-
door unit is not damaged due to use for a long
time.
• It may cause injury or an accident.
Do not disassemble or repair the product ran-
domly.
• It will cause a fire or electrical shock.

6Multi Air Conditioner
Safety Precautions
Do not install the product at a place that there
is concern of falling down.
• Otherwise, it may result in personal injury.
Use caution when unpacking and installing.
• Sharp edges may cause injury.
Take the power plug out if
necessary, holding the head
of the plug and do not touch
it with wet hands.
• Otherwise, it may cause a fire
or electrical shock.
Do not use the power cord
near the heating tools.
• Otherwise, it may cause a fire
and electrical shock.
Do not open the suction
inlet of the indoor/outdoor
unit during operation.
• Otherwise, it may electrical
shock and failure.
Do not allow water to run
into electrical parts.
• Otherwise, it may cause the
failure of machine or electrical
shock.
Hold the plug by the head
when taking it out.
• It may cause electric shock
and damage.
Never touch the metal parts
of the unit when removing
the filter.
• They are sharp and may
cause injury.
Do not step on the
indoor/outdoor unit and do
not put anything on it.
• It may cause an injury through
dropping of the unit or falling
down.
Do not place a heavy object
on the power cord.
• Otherwise, it may cause a fire
or electrical shock.
When the product is sub-
merged into water, always
contact the service center.
• Otherwise, it may cause a fire
or electrical shock.
Do not share the outlet with
other appliances.
•
It will cause an electric shock or
a fire due to heat generation.
Do not use the damaged
power cord.
• Otherwise, it may cause a fire
or electrical shock.
Do not modify or extend the
power cord randomly.
• Otherwise, it may cause a fire
or electrical shock.
Take care so that the power
cord may not be pulled dur-
ing operation.
• Otherwise, it may cause a fire
or electrical shock.
Unplug the unit if strange
sounds, smell, or smoke
comes from it.
• Otherwise, it may cause elec-
trical shock or a fire.
Keep the flames away.
• Otherwise, it may cause a fire.
Take care so that children may not step on the outdoor unit.
• Otherwise, children may be seriously injured due to falling down.
nOperation
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.

Installation Manual 7
Safety Precautions
ENGLISH
CAUTION
nInstallation
Install the drain hose to ensure that drain
can be securely done.
• Otherwise, it may cause water leakage.
Install the product so that the noise or hot
wind from the outdoor unit may not cause
any damage to the neighbors.
• Otherwise, it may cause dispute with the neigh-
bors.
Always inspect gas leakage after the instal-
lation and repair of product.
• Otherwise, it may cause the failure of product.
Keep level parallel in installing the product.
• Otherwise, it may cause vibration or water leak-
age.
Avoid excessive cooling and perform venti-
lation sometimes.
• Otherwise, it may do harm to your health.
Use a soft cloth to clean. Do not use wax,
thinner, or a strong detergent.
• The appearance of the air conditioner may de-
teriorate, change color, or develop surface
flaws.
Do not use an appliance for special purposes
such as preserving animals vegetables, preci-
sion machine, or art articles.
• Otherwise, it may damage your properties.
Do not place obstacles around the flow inlet
or outlet.
• Otherwise, it may cause the failure of appliance
or an accident.
nOperation

8Multi Air Conditioner
Safety Precautions
Installation of Indoor, Outdoor Unit
Read completely, then follow step by step.
Indoor unit
1. Do not have any heat or steam near the unit.
2. Select a place where there are no obstacles in
front of the unit.
3. Make sure that condensation drainage can be
conveniently routed away.
4. Do not install near a doorway.
5. Ensure the unit is unobstructed, allow proper
space on all sides according to the arrows and
distance measurements in the figures.
6.
Use a Metal Detector or Metal Scanner to locate
studs to prevent unnecessary damage to the wall.
Select the best location
Top view
Front view
H=20(25/32) or more
Service Space
Ceiling
A
B
Capacity(Btu/h class) AB
9/12k 600(23-5/8) 900(35-7/16)
18k 600(23-5/8) 1100(43-5/16)
Unit:mm(inch)
[Ceiling Concealed Duct Type] [Ceiling Cassette Type]
[ART COOL Gallery]
* Suitable dimention “H” is necessary to get a slope to
drain as show in the figure.
600
(23-5/8)
600
(23-5/8)
Inspection hole
[600(23-5/8) x 600(23-5/8)]
Control box
Ceiling
Ceiling Board Ceiling Board
Floor
Unit:mm(inch)
At least 1800(70-
7
/
8
)
3600(141-
23
/
32
) or less
1000(39-
3
/
8
)
or more
500(19-
11
/ 16 )
or more
10(
13/32
)
or more
500(19-
11
/ 16 )
or more
300(11-
13
/
16
) or less
30(1-3/16)
±3(1/8)
More than
200(7-87/100)
More than
500(19-11/16)
More than
1500(59-11/200)
More than
500(19-11/16)
More than 200(7-7/8)
Recommended height
2000(78-3/4)
More than
100(3-15/16)
More than
100(3-15/16)
Unit:mm(inch)
[Wall mounted / ART COOL Mirror]
❈ Note : remove obstructions to prevent blockage of airflow path

Installation Manual 9
Installation of Indoor, Outdoor Unit
ENGLISH
Outdoor unit
1. If an awning is built over the unit to prevent di-
rect sunlight or rain exposure, make sure that
heat radiation from the condenser is not re-
stricted.
2. Ensure the unit is unobstructed, allow proper
space on all sides according to the arrows
and distance measurements in the figures.
3. Do not place animals and plants in the path of
the warm air.
4. Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.
5.
Select a place so that the warm air and sound
from the air conditioner does not disturb
neighbors.
Rooftop Installations:
If the outdoor unit is installed on a roof structure,
be sure to level the unit. Ensure the roof struc-
ture and anchoring method are adequate for the
unit location. Consult local codes regarding
rooftop mounting.
more than
700 (27 9/16)
more than
300 (11 13/16)
more than
600 (23 21/32)
more than
300 (11 13/16)
more than
600 (23 21/32)
Unit:mm(inch)

10 Multi Air Conditioner
Installation of Indoor, Outdoor Unit
Seaside Applications and Installation
1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are
produced.
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result
corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could
cause product malfunction or inefficient performance.
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind.
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.
Install the outdoor unit on the opposite side of the sea wind direction.
2)
In case, to install the outdoor unit on the seaside, set up a windbreaker/barrier, to lessen the unit's exposure to sea air
3) Select a well-drained place.
• It should be strong enough (like concrete) to obstruct
the wind from the sea.
• The height and width should be more than 150% of
the outdoor unit.
• A minimum of 70cm (27 1/16 inches)
of space between outdoor unit and the windbreak
for easy air flow.
Sea wind Sea wind
Sea wind
Windbreaker/Barrier
Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger
using water is recommended.
1. Selecting the location(Outdoor Unit)