LG A6UW368FA0 User manual

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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.
P/NO : 3828A20567B
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

2Room Air Conditioner
Multi Type Air Conditioner Installation Manual
TABLE OF CONTENTS
The following should be
always observed for safety ....................................3~5
Installation of indoor, outdoor unit .....................6~12
Flaring work and connection of piping.............13~16
Connecting the Cable between Indoor Unit and
Outdoor Unit........................................................17~18
Checking the Drainage, Forming the Pipings
and Long pipe Setting ........................................19~20
Air Purging...........................................................21~22
Panel Front Assembly ..............................................23
Test running...............................................................24
Combination indoor units ........................................25
❏Level gauge
❏Screw driver
❏Electric drill
❏Hole core drill (ø50mm)
❏Horizontal meter
❏Flaring tool set
❏Specified torque wrenches
1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(different depending on model No.)
❏Spanner .................Half union
❏A glass of water
❏Screw driver
❏Hexagonal wrench(4mm)
❏Gas-leak detector
❏Vacuum pump
❏Gauge manifold
❏Owner's manual
❏Thermometer
❏Holder Remote Control
Installation Requirements Required Tools

Installation Parts Provided
Installation Manual 3
ENGLISH
Installation Parts Provided
Type "A" screws and plastic anchors
Type "B" screws Holder Remote Control
Installation plate
Standard Type
more than
70cm
more than
30cm
more than
30cm
Air Outlet
Air Intake
(side, rear)
Connection pipe
Drain hose
Connecting wire
Control cover
more than
30cm

4Room Air Conditioner
Do not disassemble or repair the product.
• Contact your dealer or service center.
Always earth the product.
• It will cause fire or electric shock.
Do not handle the flamable gas or explosive
materials near the product.
• Otherwise, it may cause fire or failure of
product.
Do not install where flamable gas could
leak.
• Otherwise, it may cause esplosion or fire.
Do not install the product on an defected
installation stand.
• Otherwise, It may cause injury or accident.
Be cautious when unpack and install the
product.
• Sharp edges could cause injury.
For electric work, contact the dealer or
service center.
• Otherwise, It will cause fire or electric shock.
Do not use damaged power cable.
• It will cause fire or electric shock.
For installation, always contact the dealer or
service center.
• Otherwise, it may cause fire, electric shock,
explosion or injury."
Do not install the product on an defected
installation stand.
• Otherwise, It may cause injury or accident
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness
is classified by the following indications.
■Meanings of 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.
WARNING
Be sure not to do.
Be sure to follow the instruction.
Safety Precautions

Installation Manual 5
ENGLISH
Safety Precautions
If strange sound, smell or smoke come from
product, turn the breaker off or disconnect
the power supply cable.
• Otherwise, it may cause electric shock or fire.
Do not put the heater, etc. near the power
cable.
• Otherwise, it may cause fire and electric shock.
Cover the electric part.
• Otherwise, it may cause fire or electric shock.
Do not turn the breaker on/off or
connect/disconnect the power supply plug
during operation.
• Otherwise, it may cause fire or electric shock.
Do not open the suction inlet of the product
during operation.
• Otherwise, it may cause electric shock or
failure.
Do not touch the metal parts of the product
when removing the air filter.
• Otherwise, it may cause personal injury.
Always inspect gas leakage after
installation and repair of product.
• Otherwise, it may cause failure of product.
Install the drain hose to ensure that drain
can be securely done.
• Otherwise, it may cause water leakage.
Keep the level even in installing the
product.
• Otherwise, it may cause vibration or water
leakage.
Do not install the product where the noise
or hot wind from the outdoor unit could
give any casualty to the neighborhood
• Otherwise, it may cause dispute with the
neighborhoods.
Do not step or put anyting on the product.
• Otherwise, it may cause personal injury and
failure of product.
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.
Always intstall an circuit breaker and main
breaker.
• No installation may cause fire and electric
shock.
Do not touch(operate) product with wet
hands.
• Otherwise, it may cause fire or electric shock.
CAUTION

6Room Air Conditioner
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 spaces indicated by arrows from
the wall, ceiling, fence or other obstacles.
6. Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
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 that the spaces indicated by arrows
around front, back and side of the unit.
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 noise
from the air conditioner do 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.
Select the best location
More than 5cm
More than
5cm
More than 2.3m More than
5cm
More than 10cm
More than 5cm
More than 2.3m
More than 5cm
More than 10cm
More than 50cm
More than 2m
More than 50cm
more than
70cm
more than
30cm
more than
30cm
CAUTION: Install the indoor unit
on the wall where the height from
the floors more than 2.3 meters.

h1
ABranch Pipe
Main Pipe
Distributor
Distributor
B
h2
Distributor Type
Installation of Indoor, Outdoor Unit
Installation Manual 7
ENGLISH
Distributor Type (m)
Piping length and elevation
36k 100 40 60 20 30 15
42k 125 55 70 20 30 15
48k 135 55 80 20 30 15
54k 145 55 90 20 30 15
Capacity
(Btu/h) Total Length
Max Main Pipe
Length (A/B)
Total Branch
Pipe Length
Max Branch
Pipe Length
Max Elevation
(h1)
In - In Elevation
(h2)
CAUTION: Capacity is based on standard length and maximum allowance
length is on the basis of reliability. Oil trap should be installed every 5~7
meters.

Installation of Indoor, Outdoor Unit
Refrigerant charge
8Room Air Conditioner
The calculation of the additional charge should be taken in account for the length of extra pipe.
•Total main pipe(A+B+C) = 30m
•Each branch pipe
a = 10m
b = 8m
c = 5m
d = 3m
e = 10m
✽Note : If additional charge value after calculation comes out to be negative, then do not
consider additional charge.
❖
Additional Charge
= (30-10) x 50
+ ((10+8+5+3+10)-35) x 25
= 1000 + 25 = 1025g
A
ex) A7UW428FA0
A
B
C
abc
7k 9k 9k
de
9k 18k
Standard length(m) Additional refrigerant(g/m) Standard length(m) Additional refrigerant(g/m)
30
35
40
45
Additional charge(g) = Main piping additional refrigerant + Branch piping additional refrigerant
Main piping additional refrigerant = (Total main piping length - standard length) x Additional refrigerant
Branch piping additional refrigerant = (Total branch piping length - standard length) x Additional refrigerant
Main piping length Branch piping length
7k/9k/12k/18k/24k : 25
A6UW368FA0
A7UW428FA0
A8UW488FA0
A9UW548FA0
Model
5
10
10
10
40
50
50
50
Additional Charge Caculcation Example-1

Installation Manual 9
ENGLISH
Installation of Indoor, Outdoor Unit
Caution
Regulation for refrigerant leakage(in Europe)
: the amount of refrigerant leakage should satisfy the following equation for human
safety.
❐If the above equation can not be satisfied, then follow the following steps.
- Selection of air conditioning system: select one of the next
1. Effective opening part Installation
2. Reconfirmation of outdoor unit capacity and piping length
3. Reduction of the amount of refrigerant
4. 2 or more security device installation of alarm for gas leakage
- Change indoor unit type
:
installation position should be over 2m from the floor (Wall mounted type →Cassette type)
- Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
- Limitation in piping work
: design for earthquake-proof and prevention against thermal stress
Total amount of refrigerant in the system 0.3 ( kg / m3)
Volume of the room at which indoor unit of the least capacity is installed

10 Room Air Conditioner
Installation of Indoor, Outdoor Unit
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 plate
Installation Plate
Type "A" screw
Installation plate
Ø70mm
Left rear piping Right rear piping
C
D
B
AØ70mm
(SQ, SR, ST, SU)
Left rear piping Right rear piping
B
A
D
C
Installation plate
(SZ)
SQ(7k~9k) 75 12 80 12
SR(9k~12k) 0 40 20 40
ST(18k~24k) 105 0 210 0
SZ(7k) 35 33 156 33
SU(9k~12k) 92 44 67 44
CHASSIS (Grade) Distance (mm)
ABCD

Installation Manual 11
ENGLISH
Installation of Indoor, Outdoor Unit
Preparing work for Installation (Artcool Type Only)
Open panel front
1. First, push the front panel backward and lift it up to remove the two screws.
2. The moment of lifting the both lower parts of panel front, you can hear sound this panel came
out, In this time panel front is separated
3. After pull down this panel a bit, and separate connecting wire with product.
Remove cover pipe and cover side
1. Remove two screws(for fixing cover pipe)
2. Pull up the cover side of desired connecting
direction, then cover side is separated.
3. In case of connecting direction is left or right,
path through the hole of cover side.
CAUTION: After removing the pipe
hole, cut the burr for safety.
When connecting pipe path through rear
wall, don’t remove the hole.
NOTICE
Drain hose junction
1. Remove the rubber stopple of desired
direction of drainage.
2. As the following picture, Insert drain hose in
the handle of drain pan, and join drain hose
and connecting hose.
Panel Front
Connector
Pipe hole
rubber cap
Only one
desiring direction
Connecting
part
Adhesive
Drain
hose

12 Room Air Conditioner
Installation of Indoor, Outdoor Unit
• Drill the piping hole with a ø70mm hole core drill. Drill the piping hole at either the right or the
left with the hole slightly slanted to the outdoor side.
Drill a hole in the wall
5-7mm
(3/16"~5/16")
Indoor
WALL
Outdoor
5-7mm
(0.2"~0.3")
Indoor
WALL
Outdoor
Standard / Artcool Deluxe type Artcool type
Sticking the installation guide map and fixing Indoor unit (Artcool Type Only)
Plastic anchors
INSTALLATION GUIDE MAP
10mm
INSTALLATION GU
INSTAIIATION GUIDE MAP
Put an Installation Guide Map on the desired surface.
Make a hole with diameter of 6mm and depth of
30-35mm when piercing a screw point.
Drive the fore plastic anchors into drilled points.
Hang the hole of product at the upper screws.
(In this time, Remove the map)
(Falling attention)
Check the fixed product with light power.
Adjust level even by level guage and fix to installation
for reference on the well.
Drill the piercing part for connecting pipe as diameter
50mm. (In case of piercing rear surface)
Refer to No. 5 on this page when making a hole in the wall.
First, Drive the two points of the upper parts by screws
(Leave 10mm for hanging product)
Drive the lower parts after facing the hole of product
with plastic anchors, and fix completely the upper
screws.
In case of nothing wrong in the matter, connect the pipe
and the wire. (Installation manual reference)
Horizontality
INSTALLATION GUIDE MAP
Plastic anchors
INSTALLATION GUIDE MAP
INSTALLATION GUIDE MAP
Hanger hole
(Rear side of
product)

Installation Manual 13
ENGLISH
Flaring Work and Connection of Piping
Flaring Work and Connection of Piping
Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the
following procedure.
Cut the pipes and the cable.
1. Use the piping kit accessory or the pipes
purchased locally.
2. Measure the distance between the indoor and
the outdoor unit.
3. Cut the pipes a little longer than measured
distance.
4. Cut the cable 1.5m longer than the pipe length.
Burrs removal
1. Completely remove all burrs from the cut cross
section of pipe/tube.
2. Put the end of the copper tube/pipe in a
downward direction as you remove burrs in
order to avoid dropping burrs into the tubing.
Putting nut on
• Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube having
completed burr removal.
(not possible to put them on after flaring work)
Flaring work
• Carry out flaring work using flaring tool as shown
below.
• Firmly hold copper pipe in a die in the dimension
shown in the table above.
Copper
pipe
90°Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Outside diameter A
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"

14 Room Air Conditioner
Flaring Work and Connection of Piping
Check
1. Compare the flared work with figure below.
2. If flare is noted to be defective, cut off the
flared section and do flaring work again.
Preparing the indoor unit's piping and drain hose for installation through the wall.
1. Route the indoor tubing and the drain hose in the direction of rear left or right
2. Tape the tubing, drain hose and the connecting cable. Be sure that the drain hose is located at
the lowest side of the bundle. Locating at the upper side can cause drain pan to overflow inside
the unit.
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =
Connection of piping - Indoor
Drain hose
Drain hose
Drain hose
Connecting
pipe
Connecting cable
Tape
Drain hose
Connecting
cable
Gas side piping
Liquid side piping
Drain hose
Loop
Connecting
cable
Loop
Gas side
piping
Liquid side
piping
Drain hose
CAUTION: If the drain hose is routed inside the room, insulate the hose with
an insulation material* so that dripping from "sweating"(condensation) will
not damage furniture or floors.
*Foamed polyethylene or equivalent is recommended.

Installation Manual 15
ENGLISH
Flaring Work and Connection of Piping
Indoor unit installation
1. Hook the indoor unit onto the upper portion of
the installation plate.(Engage the two hooks
of the rear top of the indoor unit with the
upper edge of the installation plate.) Ensure
that the hooks are properly seated on the
installation plate by moving it left and right.
Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots(clicking sound).
Connecting the pipings to the in door
unit and drain hose to drain pipe
1. Align the center of the pipings and sufficiently
tighten the flare nut by hand.
2. Tighten the flare nut with a wrench.
3. When extending the drain hose at the indoor
unit, install the drain pipe.
Wrap the insulation material around
the connecting portion.
1. Overlap the connection pipe insulation
material and the indoor unit pipe 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.
Drain hose
Connecting
cable
Indoor unit tubing Flare nut Pipings
Torque wrench
Indoor unit tubing
Spanner (fixed)
Connection pipe
Flare nut
mm inch kg.m
Ø6.35 1/4 1.8~2.5
Ø9.52 3/8 3.4~4.2
Ø12.7 1/2 5.5~6.6
Ø15.88 5/8 6.3~8.2
Ø19.05 3/4 9.9~12.1
Outside diameter Torque
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
Plastic bands Insulation material
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Vinyl tape
(wide) Wrap with vinyl tape
Indoor
unit pipe
Pipe

16 Room Air Conditioner
Flaring Work and Connection of Piping
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.
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
CAUTION: Installation Information (For right piping)
For right piping, follow the instruction below.
Good case
• Press on the upper side of clamp and unfold
the tubing to downward slowly.
Bad case
• Following bending type from left to right could
cause problem of pipe damage.
Align the center of the piping and sufficiently
tighten the flare nut by hand.
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.
Socket(Included in Outdoor Unit)
Outdoor
unit
BD
unit
Gas side piping
Liquid side piping
Torque wrench
Outdoor unit
Connection of piping - Outdoor
Outside diameter Torque
mm inch kg.m
Ø6.35 1/4 1.8~2.5
Ø9.52 3/8 3.4~4.2
Ø12.7 1/2 5.5~6.6
Ø15.88 5/8 6.3~8.2
Ø19.05 3/4 9.9~12.1

Flaring Work and Connection of Piping
Installation Manual 17
ENGLISH
Piping Connection Size(A6UW368FA0)
A6UW368FA0 B B B B B B
BD Unit
AA
A
Branch unit
BB
A
A6UW368FA0
1. While piping installation you must use the connector
2. Align the center of the pipings and
sufficiently tighten the flare nut by
hand.
Gas Liquid
Ø19.05 ➔ Ø15.88 Ø9.52 ➔ Ø6.35
Liquid
Gas
mm
mm
AB
Adjust to indoor unit
piping size
Ø6.35
Ø15.88
3. 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.
ab
ab
ab
[Connector]
Socket(Included in Outdoor Unit)
Outdoor
unit
BD
unit

18 Room Air Conditioner
Flaring Work and Connection of Piping
Piping connection size(A7UW42/A8UW48/A9UW548FA0)
A7UW428FA0
A8UW488FA0
A9UW548FA0
A7UW428FA0
A8UW488FA0
A9UW548FA0
A9UW548FA0
Ø19.05Gas mm
Adjust to indoor unit
piping size
Ø9.52Liquid mm
BA
A
BB
BD Unit
Branch unit
A
A
A
BBBBBB
BD Unit
Branch unit
A
A
A
A
BBBBBB
BD Unit
BBB

Installation Manual 19
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 earth wire should be longer than the common wires.
The circuit diagram is not subject to change without notice.
When installing, refer to the circuit diagram behind the panel front of Indoor Unit the wiring
diagram on the Control Cover Inside Outdoor Unit.
Connect the cable to the Indoor unit.
CAUTION:
•The circuit diagram is not subject to change without notice.
•Be sure to connect wires according to the wiring diagram.
•Connect the wires firmly, so that not to be pulled out easily.
•Connect the wires according to color codes by referring the wiring diagram.
CAUTION: Provide a circuit
breaker between power source
and the unit as shown below.
CAUTION: The power cord connected to the outdoor unit should be complied
with the following specifications (Cable type approved by HAR or SAA).
The power connecting cable connected to the indoor and outdoor unit
should be complied with the following specifications (Type "B" approved by
HAR or SAA).
Air
Conditioner
Main power source
Circuit Breaker
Use a circuit breaker
or time delay fuse.
GN/YL 20mm
36k 42k 48k 54k
2.5 3.5 3.5 3.5
Cable Type H05RN-F
NORMAL CROSS
SECTIONAL AREA
Grade
(mm2)
NORMAL
CROSS-SECTIONAL
AREA 0.75mm
2
H05VV-F
ø7.5mm
GN/YL 20mm

20 Room Air Conditioner
Connecting the Cable between Indoor Unit and Outdoor Unit
Connect the cable to the Outdoor unit.
1. Remove the cover control 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. Refix the cover control to the original position
with the screw.
4. Use a recongnized circuit breaker between
the power source and the unit. A
disconnection device to adequately
disconnect all supply lines must be fitted.
Circuit
Breaker
(A)
Grade (Btu/h)
36k 42k 48k 54k
20 20 20 20
Power cord
Connecting
cable
Cover control
Terminal block
Outdoor unit
Over 5mm
Holder for
power supply
cord
Loosen terminal screw
Terminal block
RSTN
CAUTION: After the confirmation of the above conditions, prepare the wiring
as follows.
1. Never fail to have an individual power circuit specifically for the air conditioner. As
for the method of wiring, be guided by the circuit diagram posted on the inside of
control cover.
2. Firmly tighten the terminal screws to prevent them loosening. After tightening, pull
the wires lightly to confirm that they do not move. (If they are loose the unit, the unit
will not operate normally or it can cause burn-out of the wires.)
3. Specification of power source.
4. Confirm that electrical capacity is sufficient.
5. See to that the starting voltage is maintained at more than 90 percent of the rated
voltage marked on the name plate.
6. Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness.
7. Do not install an earth leakage circuit breaker in a wet or moist area.
8. The following would be caused by voltage drop.
•Vibration of a magnetic switch, which will damage the contact point, fuse breaking,
disturbance of the normal function of the overload.
9. The means for disconnection from a power supply shall be incorporated in the fixed
wiring and have an air gap contact separation of at least 3mm in each active(phase)
conductors.