P/NO : MFL39817319
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
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ENGLISH FRANÇAIS ESPAÑOL
FLEX MULTI SPLIT INSTALLATION
INSTRUCTIONS
Installation Manual 3
Multi Air Conditioner Installation Manual
TABLE OF CONTENTS
Installation Parts Provided ...................................................4
Product Introduction .............................................................5
Indoor Unit.........................................................................5
Outdoor Unit......................................................................5
Safety Precautions ................................................................6
Installation of Indoor, Outdoor Unit.....................................9
Select the best location ....................................................9
Seaside Applications and Installation ..............................11
Piping length and elevation.............................................12
Installation............................................................................13
Connecting the piping .....................................................13
How To Fix ......................................................................17
Wiring Connection...........................................................18
Conduit connection .........................................................18
Ceiling dimension and hanging bolt location ..................19
How to Fix .......................................................................20
Wiring Connection...........................................................20
Conduit connection .........................................................20
Installation of wired Remote Controller ...........................22
Wired remote controller switch information.....................23
Trial Operation.................................................................24
Celsius/Fahrenheit Switching..........................................25
Setting the Central-Control Address ...............................26
ESP Function ..................................................................27
Ceiling dimension and hanging bolt location ..................28
Wiring Connection...........................................................29
Conduit connection .........................................................29
Installation of Wired Remote Controller(Optional) ..........30
Installation of Decorative Panel ......................................32
Drain Piping.....................................................................34
Flaring Work and Connection of Piping............................37
Flaring work.....................................................................37
Connection of piping - Outdoor .......................................38
Connecting the Cable between Indoor Unit and
Outdoor Unit.........................................................................39
Connect the cable to the Indoor unit...............................39
Connect the cable to the Outdoor unit. ...........................40
Connection method of the connecting cable(Example) ..41
Checking the Drainage, Insulating the Pipe and Special
Piping Applications .............................................................42
Insulating the Pipe and Special Piping Applications .......42
Long Pipe Setting ................................................................43
Air Purging and Evacuation ...............................................44
Leak Checking ................................................................44
Evacuation.......................................................................45
Charging ...............................................................................46
Combination indoor units...................................................47
❏ Level gauge
❏ Screw driver
❏ Electric drill
❏ Hole core drill (ø50mm)
❏ Flaring tool set
❏ Specified torque wrenches
1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(different depending on model No.)
❏ Adjustable wrench
❏ A glass of water
❏ Screw driver
❏ Hexagonal wrench(4mm)
❏ Refrigerant Gas Leak Detector
❏ Vacuum pump
❏ Gauge manifold
❏ Owner's manual
❏ Thermometer
❏ Remote Control Holder
Installation Requirements
Required Tools
ENGLISH
4 Multi Air Conditioner
Installation Parts Provided
Installation Parts Provided
[Standard / Standard Libero / Artcool 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
ENGLISH
Product Introduction
Here is a brief introduction of the indoor and outdoor units. Please see the information specific to
your indoor unit type.
Product Introduction
more than
70
more than
more than
30 cm
(1
1.8 inch)
more than
30 cm
(11.8 inch)
Air Intake
(side, rear)
Connection pipe
Drain hose
Connecting wire
Control cover
more than 30 cm
(11.8 inch)
Signal receiver
Front panel
Air discharge
ON/OFF button
Power cord
Plasma filter
Air inlet
Air filter
Air inlet
Plasma filter (Optional)
Air filter
Air outlet
Front grille
ON/OFF button
Signal
receiver
Grille tab
Flap
(Horizontal blade)
Louvers
(Vertical blades)
Cabinet
Air Discharge
Air Inlet
Signal receiver
Front Panel
Air outlet vents
Air Inlet
[Standard Type]
[Ceiling Concealed Duct Type]
[Standard Libero Type]
[Artcool Mirror Type]
[Ceiling Cassette Type]
Operation lamp
Signal Receiver
ON/OFF button
Air inlet
Plasma filter
Air filter
Front grille
Vertical louver
Air outlet
Horizontal vaneHorizontal vaneHorizontal vane
Air inlet
Front grille
On/ Off button
Signal receiver
Operation lamp
Plasma filter
Air filter
[Artcool Libero Type]
Air outlet
Vertical Louver
Horizontal Vane
more than
30 cm
(1
1.8 inch)
Air outlet vents
Base plate
Connection pipe
Drain hose
Connecting wire
Air intake vents
Horizontal vane
Indoor Unit
Outdoor Unit
❈ The figure can be changed according to model.
6 Multi Air Conditioner
Safety Precautions
To prevent the injury of the user or other people and property damage, the following instructions
must be followed.
■ Be sure to read before installing the air conditioner.
■ Be sure to observe the cautions specified here as they include important items related to safety.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■ The 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
■ Installation
Be sure not to do.
Be sure to follow the instruction.
Safety Precautions
Always perform grounding.
• Otherwise, it may cause
electrical shock.
Don’t 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
center or a professional
installation agency.
• Otherwise, it may cause a fire,
electrical shock, explosion or
injury.
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
attached 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
outdoor 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
randomly.
• It will cause a fire or electrical shock.
Installation Manual 7
ENGLISH
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
submerged 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
during 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
electrical 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.
■ Operation
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.
8 Multi Air Conditioner
Safety Precautions
CAUTION
■ Installation
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
neighbors.
Always inspect gas leakage after the
installation 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
leakage.
Avoid excessive cooling and perform
ventilation 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
deteriorate, change color, or develop surface
flaws.
Do not use an appliance for special purposes
such as preserving animals vegetables,
precision 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.
■ Operation
Installation Manual 9
ENGLISH
Installation of Indoor, Outdoor Unit
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]
* 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(7-7/8)
Recommended height
2000(78-3/4)
More than
100(3-15/16)
More than
100(3-15/16)
Unit:mm(inch)
[Standard/Standard Libero/Artcool Mirror/Artcool Libero Type]
❈
Note : remove obstructions to prevent blockage of airflow path
10 Multi Air Conditioner
Installation of Indoor, Outdoor Unit
Outdoor unit
1. If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the condenser is not
restricted.
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 structure 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 300
(11 13/16)
more than 600
(23 21/32)
more than 300
(11 13/16)
more than 300
(11 13/16)
Unit:mm(inch)
Unit:mm(inch)
Installation Manual 11
ENGLISH
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)
12 Multi Air Conditioner
Installation of Indoor, Outdoor Unit
Multi Piping Type
Piping length and elevation
h2
A
B
C
D
h1
CAUTION: Capacity is based on standard length and maximum allowance
length is on the basis of reliability.
9k 9.52(3/8) 6.35(1/4) 7.5(25) 20(0.22)
12k 9.52(3/8) 6.35(1/4) 7.5(25) 20(0.22)
18k 12.7(1/2) 6.35(1/4) 7.5(25) 20(0.22)
Gas Liquid
Standard
Pipe Length
Unit : m(ft)
Additional
Refrigerant
Unit : g/m(oz/ft)
Indoor unit
Capacity
(Btu/h class)
Pipe Diameter
Unit : mm(inch)
Unit : m(ft)
18k 50(164) 25(82) 3(10) 15(49) 7.5(25) 24k
24k 75(246) 25(82) 3(10) 15(49) 7.5(25) 33k
36k 75(246) 25(82) 3(10) 15(49) 7.5(25) 48k
Outdoor Unit
Capacity
(Btu/h class)
Max total length
of all pipes
(A+B)/(A+B+C)/
(A+B+C+D)
Max length of
each pipe
(A/B/C/D)
Min length of
each pipe
(A/B/C/D)
Max Elevation
between each
indoor unit and
outdoor unit (h1)
Max elevation
between indoor
units (h2)
Max.Combination
of Indoor unit
(Btu/h class)
Installation Manual 13
ENGLISH
Installation
# Standard / Artcool Mirror Type
1. Prepare the indoor unit's piping and drain
hose for installation through the wall.
2. Remove the plastic tubing retainer(see the
illustration on the right) and pull the tubing
and drain hose away from chassis.
3. Route the indoor tubing and the drain hose to
the required piping hole position.
4. Insert the piping, drain hose, and the
connecting cable into the piping hole.
5.
Insert the connecting cable into the indoor unit.
• Don't connect the cable to the indoor unit.
• Make a small loop with the cable for easy
connection later.
6. Tape the tubing and drain hose.
7. Indoor unit installation
• Hang the indoor unit from the hooks at the
top of the installation plate.
• Insert the spacer etc. between the indoor
unit and the installation plate and separate
the bottom of the indoor unit from the wall.
Drain pipe
Connecting
pipe
Tape
Drain hose
Installation plate
Spacer
Indoor unit
80(3 5/32)
For right rear piping For left rear piping
Installation
Connecting the piping
[Standard / Standard Libero / Artcool Mirror Type]
14 Multi Air Conditioner
Installation
# Standard Libero / Artcool Libero Type
1. Pull the screw cap at the bottom of the in-
door unit
2. Remove the chassis cover from the unit by
loosing screws
3. Pull back the tubing holder.
4. Remove pipe port cover and positioning
the tubing
Chassis cover
Right
Indoor unit back side view
Tubing holder
Backwards
Left
Pipe Port
5. Indoor unit installation
1) Hook the indoor unit onto the upper portion of
the installation plate.( engage the three
hooks at the top of the indoor unit with the
upper edge of the installation plate) Ensure
that the hooks are properly seated on the in-
stallation plate by moving it left and right
2) Unlock the tubing holder from the chassis
and mount between the chassis and installa-
tion plate in order to separate the bottom side
of the indoor unit from the wall
Tubing Holder
Installation plate
Installation Manual 15
ENGLISH
Installation
Connecting the piping to the indoor unit
and drain hose to drain pipe.
1. Align the center of the pipes and
sufficiently tighten the flare nut by hand.
2. Tighten the flare nut with a wrench.
3. Next, extend the indoor unit's drain hose.
Then attach the drain pipe.
Indoor unit tubing Flare nut Pipes
Wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
mm inch kgf.m (lbf·ft)
Ø6.35 1/4 1.8~2.5 (13~18)
Ø9.52 3/8 3.4~4.2 (24~30)
Ø12.7 1/2 5.5~6.6 (40~48)
Outside diameter Torque
Installation Information. For left piping. Follow the instruction below.
Good case
• Press on the upper side of clamp and unfold the tubing to slowly downward.
Bad case
• Bending the pipe from right to left may cause damage to the tubing.
16 Multi Air Conditioner
Installation
Wrap the insulation material around the
connecting portion.
1. Overlap the connection pipe insulation and the
indoor unit pipe heat insulation material. Bind
them together with vinyl tape so that there is no
gap.
2. Wrap the area which accommodates the rear
piping housing section with vinyl tape.
3. Bundle the piping and drain hose together by
wrapping them with vinyl tape over the range
within which they fit into the rear piping housing
section.
Reroute the pipings and the drain hose across
the back of the chassis.
Finishing the indoor unit installation
# Standard / Artcool Mirror Type
1. Remove the spacer.
2. Ensure that the hooks are properly seated on
the installation plate by moving it left and right.
3. Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots(clicking sound).
# Standard Libero / Artcool Libero Type
1.
Mount the tubing holder in the original positon.
2.
Ensure that the hooks are properly seated on the
installation plate by moving it left and right.
3. Press the lower left and right sides of the unit
against the installation plate until the hooks en-
gage into their slots (clicking sound).
4.
Finish the assembly by screwing the unit to the
installation plate by using two pieces of type "C"
screws. And assemble a chassis cover.
Plastic bands
Insulation material
Vinyl tape(narrow)
Connection pipe
Vinyl tape (wide)
Wrap with vinyl tape
Indoor unit pipe
Pipe
Drain hose
Vinyl tape(wide)
Piping for
passage through
piping hole
Drain hose
Connecting
Type 'C' screw
If the split type Indoor unit is installed in a wall having hole or opening near by or back side of the
unit, then the air from other side of the wall can come inside the condition space through that hole
/ opening. That air can cause unwanted dew / water droplet formation when it comes in contact
with body of the indoor unit. So all hole or opening on the wall must be blocked very well to avoid
water dropping from the body of the unit.
Installation Manual 17
ENGLISH
Installation
The wall you select should be strong and solid enough to prevent vibration
1. Mount the installation plate on the wall with
type "A" screws. If mounting the unit on a concrete wall, use anchor bolts.
• Mount the installation plate horizontally by aligning the centerline using a level.
2. Measure the wall and mark the centerline. It is also important to use caution concerning the
location of the installation plate-routing of the wiring to power outlets is through the walls
typically. Drilling the hole through the wall for piping connections must be done safely.
How To Fix
Installation of filters
1) Detach two attached tapes from the plasma
filter.
Plasma Filter
Ø70
(2 3/4)
Ø70
(2 3/4)
110(4 11/32)
110
(4 11/32)
90
(3 17/32)
70
(2 3/4)
Chassis
Hook
Installation Plate
Type “A”
Left rear piping Right rear piping
Ø70
(2 3/4)
133(5 1/4)
Ø70
(2 3/4)
100(3 15/16)
Chassis
Hook
Installation Plate
Type “A”
Left rear piping Right rear piping
Ø70
(2 3/4)
133(5 1/4)
95(5 3/4)
217(8 17/32)
175(6 7/8)
442(17 13/32) 442(17 13/32)
Ø70
(2 3/4)
Installation Plate
Enganche
del chasis
Type "A" Screws
Right rear piping
Left rear piping
Installation Plate
Place a level on raised tab
Unit Outline
Ø70
(2 3/4)
Ø70
(2 3/4)
69(2 23/32)
56(2 7/32)
207(8 5/32)
105(4 1/8)
460(18 1/8) 570(22 7/16)
Installation Plate
Enganche
del chasis
Type "A" Screws
Left rear piping
Installation Plate
Place a level on raised tab
Unit Outline
Right
rear
piping
Measuring Tape
Hanger
Measuring Tape
<Type 1> <Type 2>
<Type 3> <Type 4>
Indoor Type
Capacity (kBtu/h)
Type
Standard / Standard Libero /
Artcool Mirror / Artcool Libero
9/12
Type 1 / Type 3
18
Type 2 / Type 4
18 Multi Air Conditioner
Installation
Wiring Connection
1. 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.
2. Attach the Grille onto the cabinet.
• Grasp the lower left and right side of the
Grille and engage four tabs on the top inside
edge of the chassis.
• Press the Grille toward the chassis until it
goes back into place.
Connecting cable
Conduit connection
1. Set the connecting cable into the terminal
block of indoor unit, and tighten set screw to
lock the conduit bracket to the indoor unit.
2. Join the conduit and the conduit bracket
together.
Connecting cable
Lock nut
Conduit
Conduit
bracket
Terminal Block in Indoor
1(L1) 2(L2) 3 4
Connected to Outdoor Unit
View
Terminal block
Connecting cable
Cable retainer
CAUTION :
Must use
the elbow type (L-Type)
conduit.
Installation Manual 19
ENGLISH
Installation
[Ceiling Concealed Duct Type]
Ceiling dimension and hanging bolt location
Installation of Unit
Install the unit above the ceiling correctly.
• Apply a joint-canvas between the unit and duct
to absorb unnecessary vibration.
• Apply a filter Accessory at air return hole.
• Install the unit leaning to a drainage hole side as
a figure for easy water drainage.
• A place where the unit will be leveled and that
can support the weight of the unit.
• A place where the unit can withstand its
vibration.
• A place where service can be easily performed.
CASE 1
POSITION OF SUSPENSION BOLT
CE
G
D
A
B
M10 Nut
M10 SP. washer
M10 washer
X 4
X 4
(Local
supply)
X 4
M10 Nut
M10 SP. washer
M10 washer
X 4
X 4
(Local
supply)
X 4
1/100
I
F
H
Drainage hole
CASE 2
POSITION OF CONSOLE BOLT
Unit:mm(inch)
9/12k
850 900 383 570 93.5 190 20.6 795 163
(33 15/32) (35 15/32) (15 3/32) (22 7/16) (3 11/16) (7 1/2) (13/16) (31 5/16) (6 13/32)
18k
1130 1180 383 570 93.5 190 20.6 1065 163
(44 1/2) (46 1/2) (15 3/32) (22 7/16) (3 11/16) (7 1/2) (13/16) (41 15/16) (6 13/32)
Dimension
Capacity
Btu/h class
ABCDEFGH I
20 Multi Air Conditioner
Installation
• Select and mark the position for fixing
bolts.
• Drill the hole for set anchor on the face of
ceiling.
• Insert the set anchor and washer onto the
suspension bolts for locking the
suspension bolts on the ceiling.
• Mount the suspension bolts to the set
anchor firmly.
• Secure the installation plates onto the
suspension bolts (adjust level roughly)
using nuts, washers and spring washers.
1 Set anchor
Old building New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
bolts
How to Fix
CAUTION : Tighten the nut and bolt to prevent unit falling.
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 of Indoor Unit
1(L1) 2(L2) 3
Connected to outdooor unit
Wiring Connection
B1/B2 Series
Conduit connection
1. Remove the busing rubber product attached on the indoor unit.
2. Set the connecting cable into the terminal block of indoor unit, and tighten set screw to lock the
conduit bracket to the indoor unit.
3. Join the conduit and the conduit bracket together.
Lock nut
Conduit
mounting
plate
Conduit
Installation Manual 21
ENGLISH
Installation
CAUTION
Ceiling
Drain Pump use
Drainage hole
Front of view
1. Install declination of the indoor unit is very important for the drain of the duct type air conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 19mm(1/32 inch).
• The unit must be horizontal or declined to the drain hose connected when
finished installation.
INSULATION, OTHERS
Insulate the joint and tubes completely.
All thermal insulation must comply with local requirement.
INDOOR UNIT
■ After all workings are finished, check the working and operation.
• Air distribution ............... Is the air circulation good?
• Drain ............................. Is the drainage smoothly and no sweating?
• Gas leakage ................. Is the piping connection correctly?
• Wiring ........................... Is the wiring connection correctly?
• Lock-bolt ....................... Is the lock-bolt of compressor loosened?
• Insulation....................... Is the unit fully insulated?
• Ground .......................... Is the unit safely grounded?
THERMAL INSULATION
TEST AND CHECK
Make sure that there is no clearance here.
Overlap with thermal
insulator for piping.
Thermal insulator for refrigerant pipe
(Local supply)
Thermal insulator for
piping(Local supply)
Hose clip for thermal insulator(Local supply)
Union for gas pipe
Refrigerant pipe and thermal
insulator(Local supply)
Union for liquid pipe
Thermal insulator for refrigerant pipe
(Local supply)
Hose clip for thermal insulator
(Local supply)
Felt
Rubber
Insulation
No clearance
Cabinet
22 Multi Air Conditioner
Installation
Installation of wired Remote Controller
CN-REMO
LO2K
J15
LO1K
LO1D
C07D
C01K
J14
CN-DISP
CN-M CN-ZONEC
IC01A
The position of the fixing screws
Side of
remote Controller
Side of
Indoor Unit
Main
indoor unit
Red Yellow Brown
Main frame
Fixing the
remote controller
20mm(25/32 inch)
1
Put the installation paper on the place and determine
the position and height of the fixing screws of the wired
remote controller.
• Refer to the printed side of the installation paper.
2
Plug the connecting cable into the indoor unit.
• The product is being shipped with the cable
connected only to the remote controller.
Fix the connecting cable with the cable rack.
3
Remove the installation paper before installing the
remote controller so that it can fit at the right place.
* Do not embed the remote controller into the wall.
(It may cause the breakdown of the
temperature sensor.)
* If you want to install a number of remote
controller at the same place in a vertical line,
install them at regular intervals of 20mm(25/32 inch).
(It may cause the breakdown of the temperature sensor.)
* Do not install the cable with a distance of 50m(164ft) or longer.
(This can cause communication error.)
* When installing the cable, check whether the connector between the remote controller and the
product is installed properly. The connector will not be connected when installed in opposite
sides.
❏ Supply the power after connecting wired remote controller.
When you need to change wired remote controller, switch off the main power and change it.
If the wired remote controller is changed before switching off the main power, the option function
of the indoor unit can't be used. (option function like "slo" fan speed selection)
Installation Manual 23
ENGLISH
Installation
Wired remote controller switch information
Group control switch
1. For individual control/Master use
2. For group control/Slave use
Ceiling height selection switch
1. Low ceiling
2. Standard ceiling
3. High ceiling
Product selection switch
1. Cooling Only product
2. Heat Pump product
Indoor temperature sensor selection
switch
1. Use the temperature sensor on the remote
controller.
2. Use the temperature sensor on the product.
3. Use the sensors on the product and remote
controller.
• When changing the product selection switch and group control switch, the power must be
reconnected to reflect the changes.
• The central control could operate inappropriately depends on indoor unit type, when the remote
controller is set as slave.
S/W 1
SWGR
SWHI
Room Temp. Sensing
Ceiling Height/Default E.S.P
Group Control
3
1
2
2
SWPD
SWTH
Select Product
2
1
1
321
24 Multi Air Conditioner
Installation
Trial Operation
The trial operation is to check the installation status of the product. The temperature will not be
controlled during trial operation. Instead the product will operate in several modes such as cooling,
strong wind, comp-on.
Out door
Room Temp
Total on
Central Run
Defrost Preheat
PQRCUCS0C
FAN
SPEED
MODE
TEMP
TEMP
1
If you want to set the trial operation mode, press
the mode button and the Fan speed button same
time for three seconds.
2
Then the product will begin the trial operation and
the display will be like as shown on left side
picture.
3
If you want to cancel the trial operation mode, just
press the On/Off button.
4
The trail operation will be shut down
automatically after 18 minutes and system will go
to the standby mode.
■ Necessary functions before using
Installation Manual 25
ENGLISH
Installation
Celsius/Fahrenheit Switching
FAN
SPEED
MODE
Out door
Room Temp
Total on
Central Run
Defrost Preheat
Room Temp
Total on
Central Run
Defrost Preheat Out door
Out door
Room Temp
Total on
Central Run
Defrost Preheat
<Setting as Celsius> <Setting as Fahrenheit>
TEMP
TEMP
Room Temp
Total on
Central Run
Defrost Preheat Out door
PQRCUCS0C
1
If you want to change the temperature unit as
the Celsius or Fahrenheit, press the
Temperature control button(▼) and the Fan
speed button same time for three seconds to
enter the setting Mode.
2
Press the temperature control button to change
the unit.
Ex) Setting unit as Fahrenheit.
3
After setting, press the Temperature control
button(▼) and the Fan speed button same time
for three seconds to exit the setting Mode.
The system will automatically release without
input after 30 seconds.
26 Multi Air Conditioner
Installation
Setting the Central-Control Address
Note : The remote controller displays 'HL' if central controller has locked the remote controller .
Out door
Room Temp
Total on
Central Run
Defrost Preheat
PQRCUCS0C
FAN
SPEED
MODE
FAN
SPEED
MODE
Group No.
Indoor Unit No.
TEMP
TEMP
TEMP
TEMP
1
If you want to set the address on the display
panel, press both temperature control buttons
(▲/▼) same time for three seconds.
2
Press the temperature-increasing button to change
the group number. Press the temperature-decreasing
button to change the indoor unit number.
e.g. As shown on the left side panel, it displays 23.
Group No. : 2
Indoor Unit No. : 3
3
Set the address by pressing both temperature
control buttons again(s/t) at the same time for
three seconds.
• If you connect the indoor unit to the central controller, you should set the network
address of the indoor unit so that the central controller could recognize it.
• The center-control address is composed of the group number and the indoor-unit
number.
Please set the address while using the central controller.
You don't need to set address if you don't use central controller.
Installation Manual 27
ENGLISH
Installation
ESP Function
Out door
Room Temp
Total on
Central Run
Defrost Preheat
PQRCUCS0C
FAN
SPEED
MODE
Lo
Med
200
100
Setting the Low wind to 210 Setting the Medium wind to 175
TEMP
TEMP
1
Press the mode button and the temperature
increasing button(▲) same time for three
seconds.
2
Set the volume of each fan speed(Low, Medium, Hi)
by using the temperature control button. Press the
fan speed button to select the fan speed.
The value of E.S.P can be adjusted from 1 to 255.
3
If you press the On/Off button while setting the ESP
function, it will be canceled. (The picture on the left
side is the example of setting the Hi wind to ESP
10.)
4
Press the mode button and the temperature
increasing button (▲) same time for three
seconds. Then the ESP setting will be activated
after the temperature display flashes three times.
E.S.P function is setting the volume of each fan speed. It is for the convenience of installation. It is
recommended that you should not use this function while using the remote controller.
EX)
❈ The E.S.P value is set at the proper value at the
factory. So it is highly recommended that you should
not change the E.S.P value at your discretion.
Static pressure(mmAq)
Setting value
01234
Model name
Step(H/M/L)
8.5 CMM(300cfm) 75 84 94 104 114
7.5 CMM(265cfm) 69 77 88 99 110
6.5 CMM(230cfm) 62 71 83 95 106
9.5 CMM(335cfm) 82 90 99 109 118
8.5 CMM(300cfm) 75 84 94 104 114
7.5 CMM(265cfm) 69 77 88 99 110
15 CMM(530cfm) 90 97 105 114 122
13.5 CMM(477cfm) 82 90 99 109 119
11.5 CMM(406cfm) 75 84 93 103 114
AMNW09GB1A0
[LMDN095HV]
AMNW12GB1A0
[LMDN125HV]
AMNW18GB2A0
[LMDN185HV]
28 Multi Air Conditioner
Installation
[Ceiling Cassette Type]
Ceiling dimension and hanging bolt location
Level gauge
Ceiling
Ceiling board
Unit: mm(inch)
585~660(23 1/16~26) (Ceiling Opening)
517(20 3/8)
461(18 5/32)
517(20 3/8)
585~660(23 1/16~26) (Ceiling Opening)
523(20 19/32)
570(22 15/32)
Unit Size
570(22 15/32)
Unit Size
319(12 9/16)
• The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions.
• 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.
NOTICE
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.
Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.
Cooking table
Air conditioner
Take enough
distance
Installation Manual 29
ENGLISH
Installation
Set screw of
paper model (4 pieces)
Paper model
for installation
Ceiling board
150mm
(5-7/8 inch)
Ceiling board
Ceiling
Flat washer for M10
(accessory)
Keep the length of the bolt
from the bracket to 40mm(1-9/16 inch)
Open the ceiling board
along the outer edge of the
paper model
Flat washer for M10
(accessory)
Hanging bolt
(W3/8 or M10)
Nut
(W3/8 or M10)
Nut
(W3/8 or M10)
Spring washer
(M10)
Air Conditioner body
Keep the length of 31~34mm(1.22~1.34inch)
between the air conditioner bottom surfac
e and the ceiling surface
• 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
CAUTION : Tighten the nut and bolt to
prevent unit from falling off.
Wiring Connection
How to Fix
1(L1) 2(L2) 3 4 5
Terminal Block of Indoor Unit
Connected to outdoor unit
OPTION
TO AIR
FRESH
KIT
TQ/TR series
Connecting Cable
Conduit
Screw
Conduit bracket
Conduit connection
• Remove the busing rubber product attached on the indoor unit.
• Join the conduit and the conduit bracket together using nut.
• Set the connecting cable into the terminal block of indoor unit, and tighten set screw to lock the
conduit bracket to the indoor unit.
• Open the control box cover and connect the remote control cord and indoor power wires.
30 Multi Air Conditioner
Installation
Installation of Wired Remote Controller(Optional)
1
2
3
2
3
<Wire guide grooves>
1. Please fix tightly using provided screw after placing remote controller setup board
on the place where you like to setup.
- Please set it up not to bend because poor setup could take place if setup board bends.
Please set up remote controller board fit to the reclamation box if there is a reclamation box.
- Install the product so as not to make a gap with the wall side and to prevent shaking after the installation.
2. Can set up Wired remote controller cable into three directions.
- Setup direction: the surface of wall reclamation, upper, right
- If setting up remote controller cable into upper and right side, please set up after removing remote con-
troller cable guide groove.
❈
Remove guide groove with long nose.
①
Reclamation to the surface of the wall
②
Upper part guide groove
③
Right part guide groove
Installation Manual 31
ENGLISH
Installation
Wall
Side
Wall
Side
Wall
Side
Wall
Side
<Connecting order>
<Separating order>
3. Please fix remote controller upper part into
the setup board attached to the surface of the
wall, as the picture below, and then, connect
with setup board by pressing lower part.
- Please connect not to make a gap at the remote controller
and setup board’s upper and lower, right and left part.
- Before assembly with the installation board, arrange the
Cable not to interfere with circuit parts.
When separating remote controller from setup
board, as the picture below, after inserting into
the lower separating hole using screw driver
and then, spinning clockwise, remote con-
troller is separated.
- There are two separating holes. Please individually sepa-
rate one at a time.
- Please be careful not to damage the inside
components when separating.
4. Please connect indoor unit and remote controller using connection cable.
5. Please use extension cable if the distance between wired remote controller and in-
door unit is more than 10m(32.8ft).
Please check if connector is normally connected.
Connecting cable
Indoor
Unit side
When installing the wired remote controller, do not bury it in the wall.
(It can cause damage in the temperature sensor.)
Do not install the cable to be 50m(164ft) or above.
(It can cause communication error.)
• When installing the extension cable, check the connecting direction of the connector of the remote con-
troller side and the product side for correct installation.
• If you install the extension cable in the opposite direction, the connector will not be connected.
• Specification of extension cable: 2547 1007 22# 2 core 3 shield 5 or above.
CAUTION
12V Red
Signal Yellow
GND Black
32 Multi Air Conditioner
Installation
Installation of Decorative Panel
The decorative panel has its installation direction.
Before installing the decorative panel, always remove the paper template.
1. Remove the packing and take out air inlet
grille from front panel.
2. Remove the Corner covers of the panel.
3. Fit the panel on the unit by inserting
hooks as shown in picture.
4. Insert two screws on diagonal corners of
panel. Do not tighten the bolts
completely. (The fixing screws are
included in the indoor unit box.)
Check the alignment of panel with the
ceiling. Height can be adjusted using
hanging bolts as shown in picture. Insert
the other two screws and tighten all
screws completely.
Front grille
Coner cover
Hook clip
Hook
Installation Manual 33
ENGLISH
Installation
5. Fit the corner covers.
6. Open two screws of control panel cover.
7. Connect one display connector and two
vane control connectors of front panel to
indoor unit PCB.
The position marking on PCB is as:
Display connector : CN-DISPLAY
Vane control connector: CN-VANE 1,2
8. Close the cover for control box.
9. Install the air inlet grille and Filter on the
panel.
Screw
CN-VANE 1,2
CN-DISPLA
Y
34 Multi Air Conditioner
Installation
CAUTION:
Install certainly the decorative panel.
Cool air leakage causes sweating. Water drops fall.
Air conditioner
unit
Ceiling
board
Decorative panel
Decorative
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
Flexible drain hose
HEAT INSULATION
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-
resistance [over 120°C(248°F)].
2. Precautions in high humidity
circumstance:
This air conditioner has been tested
according to the "KS Standard
Conditions with Mist" and confirmed
that there is not any default. However, if
it is operated for a long time in high
humid atmosphere [dew point
temperature: more than 23°C(73.4°F)],
water drops are liable to fall. In this
case, add heat insulation material
according to the following procedure:
• Heat insulation material to be prepared... Adiabatic glass wool with thickness 10 to 20mm.
• Stick glass wool on all air conditioners that are located in ceiling atmosphere.
Indoor unit
Thermal insulator
(accessory)
Fastening band
(accessory)
Refrigerant piping
Drain Piping
1. The drain hose should point downward for
optimum drainage.
2. Incorrect Installation Examples:
Downward slope
Do not raise
Accumulated
drain water
Tip of drain hose
dipped in water
Air
Kinking
Water
leakage
Water
leakage
Ditch
Less than 50mm
(1 31/32 inch) gap
Water
leakage
[Standard / Standard Libero / Artcool Mirror Type]
Installation Manual 35
ENGLISH
Installation
CAUTION : The supplied
flexible drain hose should not
be curved, neither screwed.
The curved or screwed hose
may cause a leakage of water.
[Ceiling Concealed Duct/Ceiling Cassette Type]
• 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 32mm(1 1/4 inch).
•
Be sure to install heat insulation on the drain piping.
Piping material: Polyvinyl chloride pipe inner
diometes Ø 25mm(1 inch) and pipe fittings
• 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.
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
Heat insulation material: Polyethylene foam
with thickness more than 8mm(5/16 inch).
Drain test
Maintenance
drain port
Upward
routing
not allowed
Pipe clamp
Indoor unit
1/50~1/100
Flexible drain hose
MAX : 700 mm(27 9/16 inch)
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)
Flexible drain hose
1/50~1/100
Flexible drain hoseFlexible drain hoseFlexible drain hose
❈ The figure can be changed according to model.
36 Multi Air Conditioner
Installation
Attention
1. Possible drain-head height is up to
700mm(27 9/16 inch). So, it must be
installed below 700mm(27 9/16 inch).
2. Keep the drain hose downward up to
1/50~1/100 inclination.
Prevent any upward flow or reverse flow in
any part.
3. 5mm(3/16 inch) 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.
1/50~1/100
MAX 700mm
(27 9/16 inch)
Elbow
Drain pump
Unit
Drain pipe
(Local supply)
Thermal insulator
(Local supply)
Wall
Drain hose
Installation Manual 37
ENGLISH
Flaring Work and Connection of Piping
Flaring Work and Connection of Piping
Flaring work
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
1) Cut the pipes and the cable.
■ Use the accessory piping kit or the pipes
purchased locally.
■ Measure the distance between the
indoor and the outdoor unit.
■ Cut the pipes a little longer than
measured distance.
■ Cut the cable 1.5m(4.9ft) longer than the
pipe length.
2) Burrs removal
■ Completely remove all burrs from the cut
cross section of pipe/tube.
■ Put the end of the copper tube/pipe to
downward direction as you remove burrs
in order to avoid to let burrs drop in the
tubing.
3) Putting nut on
■ Remove flare nuts attached to indoor
and outdoor units, than put them on
pipe/tube having completed burr
removal.
(Not possible to put them on after flaring
work)
4) Flaring work
■ Carry out flaring work using flaring tool
as shown below.
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
5) Check
■ Compare the flared work with figure.
■ If flare is noted to be defective, cut off
the flared section and do flaring work
again.
Copper
tube
90
Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
mm inch mm inch
Ø6.35 1/4 1.1~1.3 0.04~0.05
Ø9.52 3/8 1.5~1.7 0.06~0.07
Ø12.7 1/2 1.6~1.8 0.06~0.07
Outside diameter A
38 Multi Air Conditioner
Flaring Work and Connection of Piping
Align the center of the piping and sufficiently
tighten the flare nut by hand.
Connecting pipe order
1) A~D-UNIT gas side pipe
2) A~D-UNIT liquid side pipe
Finally, tighten the flare nut with torque wrench
until the wrench clicks.
• When tightening the flare nut with torque
wrench ensure the direction for tightening
follows the arrow on the wrench.
Main gas
side valve
Main liquid
side valve
Gas side piping
Liquid
side piping
A-UNIT
B-UNIT
C-UNIT
D-UNIT
Outdoor unit(36 kBtu/h class)
Connection of piping - Outdoor
Outside diameter Torque
mm inch kgf.m(lbf.ft)
Ø6.35 1/4
1.8~2.5 (13~18)
Ø9.52 3/8
3.4~4.2 (24~30)
Ø12.7 1/2
5.5~6.6 (40~48)
(Only Indoor Units
18 kBtu/h class )
Installation Manual 39
ENGLISH
Connecting the Cable between Indoor Unit and Outdoor Unit
Connecting the Cable between Indoor Unit and Outdoor Unit
Connect the cable to the indoor unit by connecting the wires to the terminals on the control
board individually according to the outdoor unit connection. (Ensure that the color of the wires
of the outdoor unit and the terminal No. are the same as those of the indoor unit.)
The ground wire should be longer than the common wires.
The circuit diagram is not subject to change without notice.
When installing, refer to the electrical diagram behind the front panel of Indoor Unit.
The wiring for the outdoor unit can be found on the inside of the Outdoor Unit control cover.
Connect the cable to the Indoor unit.
RECOMMENDATION:
• The circuit diagram is subject to change without notice.
• Be sure to connect wires according to the wiring diagram.
• Connect the wires firmly, so that they can not be pulled out easily.
• Connect the wires according to color codes by referring to the wiring diagram.
RECOMMENDATION:
Provide a
circuit breaker between power
source and the outdoor unit as
shown below.
RECOMMENDATION:
The power cord connected to the outdoor unit should
comply with the following specifications: NRTL Recognized(for example, UL or
ETL recognized and CSA certified).
Air
Conditioner
Main power source
Circuit Breaker
Use a circuit breaker
or time delay fuse.
Line voltage
(208/230V)
GN/YL
20mm
(25/32 inch)
GN/YL
20mm
(25/32 inch)
RECOMMENDATION: When using separate wires as the power cord, please secure
separate wires in the control box panel using tie wraps to hold all wires in place.
■ Power supply cable
■ Connecting cable
Outdoor Unit
Capacity
(Btu/h class)
Power source
Fuse or breaker
Capacity
18k 1ø,208/230V 15A
24/36k 1ø,208/230V 25A
The minimum recommended wire size for the 18kBtu/h unit
is AWG 14-3, the minimum wire size for the 24/36kBtu/h
unit is AWG 12-3.
As always, final wire selection is governed by local codes
and should be installed by a licensed professional
contractor.
The power connecting cable between the outdoor and
indoor units must comply with the following specifications:
NRTL Recognized (for example, UL or ETL recognized and
CSA certified).
AWG 18-4 is the minimum recommended wire size,
however, the selected conductors must comply with local
codes and be suitable for installation in wet locations.
40 Multi Air Conditioner
Connecting the Cable between Indoor Unit and Outdoor Unit
Connect the cable to the Outdoor unit.
1. Remove the control cover from the unit by
loosening the screw.
Connect the wires to the terminals on the
control board individually as the following.
2. Secure the cable onto the control board with the
holder (clamper).
3. Re-attach the cover control to the original
position using the screws.
:
1. Use connection cable NRTL(UL, ETL, CAS…) listed and stranded copper(4) THHN conductors,
sunlight (UV) resistant ROHS compliant PVC jacket 600V direct burial listed, approved for wet
conditions. Temperature rated for –20℃(-4℉) to 90℃(194℉). And this cable should be enclosed
in conduit.
WARNING:
• Be sure to comply with local and national codes while running the wire from the indoor unit to
the outdoor unit(size of wire and wiring method, etc).
• Every wire must be connected firmly.
• No wire should be allowed to touch refrigerant tubing, the compressor or any moving parts.
• The communication wirings of air conditioner should be separate and isolated from external
device’s electric wiring such as computers, elevator, radio & Television broadcasting facilities,
as well as medical imaging offices.
NOTICE
1(L1) 2(L2) 3 1(L1) 2(L2) 3
Indoor Unit Terminal Block
A Unit
Indoor Unit Terminal Block
B Unit
L1 L2 1(L1) 2(L2) 3(A) 3(B)
POWER SUPPLY A UNIT
B UNIT
C UNIT
D UNIT
1(L1) 2(L2) 3 1(L1) 2(L2) 3
A Unit B Unit
1(L1) 2(L2) 3(B) 3(A) 1(L1) 2(L2) 3(C) 3(D)
POWER SUPPLY A UNIT
B UNIT
Indoor Unit Terminal Block Indoor Unit Terminal Block
1(L1) 2(L2) 3
C Unit
Indoor Unit Terminal Block
1(L1) 2(L2) 3
D Unit
Indoor Unit Terminal Block
L1 L2
36k Only
18kBtu/h class
24/36 kBtu/h class
Outdoor unit
Terminal
block
Conduit hole
Power supply
cable
Connecting cable
(to the indoor unit)
Screw
Cover control
Installation Manual 41
ENGLISH
Connecting the Cable between Indoor Unit and Outdoor Unit
(1) Remove the side panel and knockouts of conduit
panel. (for low voltage line)
(2) Pull out connection cable through conduit.
(3) After conduit to the panel, fix nut to the opposite
side of panel.
(4) Pass the connection cabel through the hole.
(5) Properly connect the cable on the terminal block.
(6) Fix the connection cable with cord clamp
provided on the unit not to have strain at the
terminal when the connection cable is pulled
outside up to a 35 pound weight
WARNING: Loose wiring may cause
the terminal to overheat or result in
unit malfunction. A fire hazard may
also exist. Therefore, be sure all
wiring is tightly connected.
When connecting each power wire to the
corresponding terminal, follow instructions "How
to connect wiring to the terminals" and fasten the
wire tightly with the fixing screw of the terminal
plate.
How to connect wiring to the terminals
◼ For strand wiring
(1) Cut the wire end with a wire cutter or wire-
cutting pliers, then strip the insulation to
expose the strand wiring about 10 mm(3/8").
(2) Using a screwdriver, remove the terminal
screw(s) on the terminal plate.
(3) Using a round terminal fastener or pliers,
securely clamp each stripped wire end with a
round terminal.
(4) Position the round terminal wire, and replace
and tighten the terminal screw using a
screwdriver.
Connection method of the connecting cable(Example)
Power supply cable
Connecting Cable
Strip 10 mm(3/8")
Round
terminal
Connecting cable
Loosening the
terminal block
screw
Fastening the
wire tightly
Strand wire
Terminal
block
Side panel
Cord clamp
Conduit hole
Power supply cable
(1Ø, 208/230V)
Connecting cable
(1Ø, 208/230V)
Taping
(for sealing)
Lock nut
(field supply)
Conduit
(field supply)
Conduit panel
Indoor Unit A
Indoor Unit B
Indoor Unit C
Indoor Unit D
42 Multi Air Conditioner
Checking the Drainage, Insulating the Pipe and Special Piping Applications
Insulating the Pipe and Special Piping Applications
Insulate the piping by wrapping the
connecting portion of the indoor unit
with insulation material and secure it
with two kinds of vinyl tape.
• If you want to connect an additional drain
hose, the end of the drain outlet should be
routed above the ground. Secure the drain
hose appropriately.
In cases where the outdoor unit is
installed below the indoor unit
perform the following:
1. Tape the piping, drain hose and connecting
cable from down to up.
2. Secure the taped piping along the exterior
wall using saddle or equivalent.
In cases where the Outdoor unit is
installed above the Indoor unit
perform the following.
1. Tape the piping and connecting cable from
down to up.
2. Secure the taped piping along the exterior
wall. Form a trap to prevent water entering
the room.
3. Secure the piping onto the wall using a
saddle or equivalent.
Plastic
band
Taping
Drain hose
Pipings
Seal a small
opening around
the pipings with
gum type sealant.
Seal a small opening
around the pipings
with gum type sealant.
Trap
Trap
Checking the Drainage, Insulating the Pipe and Special Piping Applications
Checking the drainage
1. Remove the Air Filter.
2. Check the drainage.
• Spray one or two glasses of water upon the
evaporator.
• Ensure that water flows drain hose of indoor
unit without any leakage.
❈ The figure can be changed according to model.
Installation Manual 43
ENGLISH
Long Pipe Setting
Long Pipe Setting
1
SW01N
234
1. Open the top cover of outdoor unit.
2. Select one of the two selectable modes as follows.
3. Set the Zone as shown in Fig.
4. Close the top cover and check whether the product works normally.
WARNING: Do not open the top cover or Set the pipe length when
operating the product.
44 Multi Air Conditioner
Air Purging and Evacuation
Air Purging and Evacuation
Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
1. Pressure in the system rises.
2. Operating current rises.
3. Cooling(or heating) efficiency drops.
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.
5. Water may lead to corrosion of parts in the refrigeration system.
Therefore, the indoor/outdoor unit and connecting tube must be checked for leaks, and vacuumed
to remove incondensible gas and moisture in the system.
Preparation
• Check that each tube(both liquid and gas side
tubes) between the indoor and outdoor units have
been properly connected and all wiring for the test
run has been completed. Remove the service
valve caps from both the gas and the liquid sides
on the outdoor unit. Check that both the liquid and
the gas side service valves on the outdoor unit
are kept closed at this stage.
Leakage test
• Connect the manifold valve(with pressure gauges)
and dry nitrogen gas cylinder to this service port
with charge hoses.
CAUTION: Be sure to use a
manifold valve for leak testing.
The high side manifold valve must
always be kept closed.
• Pressurize the system to no more than 550
P.S.I.G. with dry nitrogen gas and close the
cylinder valve when the gauge reading
reached 550 P.S.I.G. Next, test for leaks with
liquid soap.
CAUTION:
To avoid nitrogen
entering the refrigerant system in a
liquid state, the top of the cylinder must be
higher than its bottom when you
pressurize the system. Usually, the cylinder
is used in a vertical standing position.
:
Leakage testing shoud be done
for each indoor unit connection set,
separately.
1. Do a leakage test of all joints of the
tubing(both indoor and outdoor) and both gas
and liquid side service valves with soap
bubbles.
Bubbles indicate a leak. Be sure to wipe off
the soap with a clean cloth.
2. After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening
the charge hose connector at the nitrogen
cylinder. When the system pressure is
reduced to normal, disconnect the hose from
the cylinder.
NOTICE
Leak Checking
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Pressure
gauge
❈ The figure can be changed according to model.
Installation Manual 45
ENGLISH
Air Purging and Evacuation
1. Connect the charge hose end described in
the preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump.
[Each Room] The vacuum pump must be
operated less than 0.8torr of the gage
pressure.
2. When the desired vacuum is reached, close
the "Lo" knob of the manifold valve and stop
the vacuum pump.
Finishing the job
1. With a service valve wrench, turn the valve
stem of liquid side valve counter-clockwise to
fully open the valve.
2. Turn the valve stem of gas side valve
counter-clockwise to fully open the valve.
3. Loosen the charge hose connected to the
gas side service port slightly to release the
pressure, then remove the hose.
4. Replace the flare nut and its bonnet on the
gas side service port and fasten the flare nut
securely with an adjustable wrench. This
process is very important to prevent leakage
from the system.
5. Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
This completes air purging with a vacuum
pump.
The air conditioner is now ready for test
running.
: Repeat evacuation procedure for each
indoor unit.
NOTICE
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Vacuum pump
Pressure
gauge
Open
Close
Evacuation
❈ The figure can be changed according to model.
46 Multi Air Conditioner
Charging
Important:
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge
using the charge amount specified on the Unit`s specification label.
Additional charge(oz ) = (Total Installation Piping Length-Standard Total Piping Length) x 0.22
Charging
■ If installed total piping length is more than standard total length, additional refrigerant charging is
necessary.
Below standard total piping length, additional refrigerant charging is not required.
18k 50(164) 25(82) 3(9.8) 20(0.22) 15(49.2)
24k 75(246) 25(82) 3(9.8) 20(0.22) 22.5(74)
36k 75(246) 25(82) 3(9.8) 20(0.22) 30(98.4)
Outdoor Unit
Capacity (Btu/h
class)
Max total length of all
pipes (A+B)/(A+B+C)/
(A+B+C+D)
Max length of each
pipe (A/B/C/D)
Min length of each
pipe (A/B/C/D)
Additional Refrigerant
Unit : g/m (oz/ft)
Standard Total Piping
Length (No Add`l
refrigerant)
Unit:m(ft)
❈ If the total additional charge value after calculation comes out to be negative, then do not
consider additional charge.
Each branch pipe
a=82ft
b=16ft
c=49ft
Additional Charge
= {(82+16+49)-98.4} x 0.22 = 10.69 oz
A
a
b
c
9k
9k
9k
Ex) A4UW363FA2
Installation Manual 47
ENGLISH
Combination indoor units
Combination indoor units
:
1. The total capacity(in Btu/h unit) of connected indoor unit models represents the total sum of the figures
expressed in the indoor model name.
2. Combinations in which the total capacity of the connected indoor units exceeds the capacity of the
outdoor unit will reduce the capacity of each indoor unit below the rated capacity during simultaneous
operation. Therefore, if circumstances allows, combine indoor units within the capacity of the outdoor unit
NOTICE
9k 12k 18k 24 k18 k 36 k
AMNW18GD5L1
[LMN185HV(T)]
Indoor Unit Capacity (Btu/h class)
Model Name
Chassis
Name
Type
Standard
Type
Artcool
Artcool
Libero
Type
Mirror
Type
SE
AMNW09GDER1
AMNW09GDBR0
[LMAN096HVT]
AMNW12GDBR0
[LMAN126HVT]
AMNW18GDCR0
[LMAN186HVT]
[LMAN095HV(T)]
Outdoor Unit Capacity (Btu/h class)
Connectable Combination
SE
S5
AMNW09GDEL1
[LMN095HV(T)]
AMNW12GDEL1
[LMN125HV(T)]
AMNW18GD8R1
[LMAN185HV(T)]
Ceiling
Concealed
Duct Type
AMNW09GB1A0
[LMDN095HV]
AMNW12GB1A0
[LMDN125HV]
B2
B1
AMNW18GB2A0
[LMDN185HV]
Ceiling
Cassette
Type
TR
AMNW12GTRA0
[LMCN125HV]
TQ
AMNW12GDER1
[LMAN125HV(T)]
S8
Standard
Libero
Type
SB
SB
SC
AMNW09GDBL0
[LMN096HVT]
AMNW09GEBA0
[LMEN096HVT]
AMNW18GDCL0
[LMN186HVT]
AMNW18GECA0
[LMEN186HVT]
AMNW12GDBL0
[LMN126HVT]
AMNW12GEBA0
[LMEN126HVT]
SC
AMNW18GTQA0
[LMCN185HV]
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
OO
O
O
O
O
O
The indoor units connectable to the outdoor unit are shown below
48 Multi Air Conditioner
US
1. Please call the installing contractor of your product, as warranty service will be provided by them.
2. If you have service issues that have not been addressed by the contractor, please call 1-888-865-3026.
CANADA
Service call Number # : (888) LG Canada, (888) 542-2623
