LG A5UW306FA3, A5UW406FA3, A8UW486FA3, A9UW566FA3, A7UW428FA3 Installation 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.

TYPE : MULTI

P/NO : 3828A20567H

ENGLISH

ITALIANO

ESPAÑOL FRANÇAIS

DEUTSCH

2 Multi Air Conditioner

Multi Type Air Conditioner Installation Manual

CONTENTS

Installation Parts Provided.........................................3

Safety Precautions..................................................4~5

Installation of indoor, outdoor unit .....................6~11

Flaring work and connection of piping.............12~21

Connecting the Cable between Indoor Unit and

Outdoor Unit........................................................22~24

Checking the Drainage, Forming the Pipings

and Long pipe Setting ........................................25~27

Air Purging and Evacuation.....................................28

Panel Front Assembly ..............................................30

Installation PI485.......................................................31

Test running...............................................................33

Combination indoor units ........................................34

Max Combination Capacity ......................................35

Installation guide at the seaside..............................36

Seasonal wind and cautions in winter....................36

❏ Level gauge
❏ Screw driver
❏ Electric drill
❏ Hole core drill (ø65mm)
❏ 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

Installation plate

Type "B" screws

Type "A" screw (6 EA) Type "A" screw (8 EA) Type "A" screw (7 EA)

Holder Remote Control

Type "A" screw and plastic anchors

Standard Type

5. Copper pipe (Liquid side)

6. Copper pipe (Gas side)

7. Connecting cable

more than

30cm

more than

60cm

more than

60cm

more than

70cm

more than

30cm

more than

30cm

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

more than

60cm

more than

60cm

4 Multi 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 a defected
installation stand.

• Otherwise, It may cause injury or accident.

Be cautious when unpacking and installing
the product.

• Sharp edges could cause injury.

Do not use damaged power cable.

• It will cause fire or electric shock.

Always intstall a circuit breaker and main
breaker.

• No installation may cause fire and electric
shock.

For installation, always contact the dealer or
service center.

• Otherwise, it may cause fire, electric shock,
explosion or injury."

For electric work, contact the dealer or
service center.

• Otherwise, It will cause fire or electric shock.

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

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 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.

Do not step or put anyting on the product.

• Otherwise, it may cause personal injury and
failure of product.

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 while 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 touch(operate) product with wet
hands.

• Otherwise, it may cause fire or electric shock.

If strange sound, smell or smoke come from
product, turn the breaker off.

• Otherwise, it may cause electric shock or fire.

CAUTION

Fix the outdoor unit on the floor.

• Otherwise, it can be blown away by the strong
wind. It will cause injury or accident.

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.

6 Multi 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 20cm

More than

10cm

More than 2.3m

More than

10cm

More than 20cm

More than

10cm

More than 2.3m

More than

10cm

More than 20cm

More

than 50cm

More than 1.5m

More

than 50cm

More than 20cm

More than

10cm

More than 2.3m

More than

10cm

more than

70cm

more than

30cm

more than

30cm

more than

30cm

more than

30cm

more than 60cm

more than

60cm

more than

60cm

more than

70cm

more than 60cm

CAUTION: Install the indoor unit
on the wall where the height from
the floors more than 2.3 meters.
(ART COOL Type Only 1.5m)

Installation of Indoor, Outdoor Unit

Installation Manual 7

ENGLISH

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.

Chassis

Hook

Installation Plate

Type “A”

Installation plate

Left rear piping Right rear piping

Ø70mm

Ø70mm

105mm

105mm

55mm

65mm

<Type 1>

<Type 1>

45mm

140mm

Ø 70mm

65mm

45mm

Ø 70mm

Installation plate

Left rear piping

Right rear piping

<Type 3>

Installation plate

Left rear piping Right rear piping

Ø70mm

133mm

101mm 101mm

Ø70mm

100mm

<Type 2>

Chassis

Hook

Installation Plate

Type “A”

<Type 2>

Fixing Installation Plate

Wall mounted 7,9,12 1/3

/ART COOL Mirror 18, 24 2

Indoor Type

Capacity

(kBtu/h)

Type

Installation Plate

Type “A”

<Type 3>

Installation of Indoor, Outdoor Unit

8 Multi Air Conditioner

h2

h1

h1

A

A

Branch Pipe

Main Pipe

Distributor

Distributor

B

B

h2

Multi Piping Type Distributor Type

Multi Piping Type (Unit: m)

Distributor Type (Unit: m)

Piping length and elevation

18 40 25 15 7.5
21 50 25 15 7.5

24/27 70 25 15 7.5

30 75 25 15 7.5
40 85 25 15 7.5

Capacity(kBtu/h) Total Length Max Length(A/B)

Max Elevation

(h1)

In - In Elevation

(h2)

40 100 50 50 15 30 15

1Ø 48 135 55 80 15 30 15

56 145 55 90 15 30 15
42 125 55 70 15 30 15

3Ø 48 135 55 80 15 30 15

54 145 55 90 15 30 15

Phase

Capacity

(kBtu/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. If outdoor unit is at higher elevation than
the indoor units, after 24m of vertical height, 1 oil trap is required.

Installation of Indoor, Outdoor Unit

Installation Manual 9

ENGLISH

Refrigerant charge

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

❖

Additional Charge

=((30-5) x 50 + (10-5) x 20 + (8-5) x 20
+ (5-5) x 20 + (3-5) x 20 + (10-5) x 20)

- (7-5) x 100 = 1270g

A

Ex) A7UW406FA3

A

B

C

abc

7k 9k 9k

d

e

9k

18k

■ Multiple Piping Models

■ Distributor type Models

Additional charge (g) = ((A Room Installation Length – Standard Length ) x 20g/m

+ (B Room Installation Length – Standard Length ) x 20g/m +.. )

- CF(Correction Factor) x 150

❈ CF = Max. number of connectable indoor unit – Total number of connected indoor unit

Additional charge (g) = (( Total Main piping Length - Main Standard Length ) x 50g/m

+ (A Room Branch Length – Standard Length ) x 20g/m
+ (B Room Branch Length – Standard Length ) x 20g/m
+ (C Room Branch Length – Standard Length ) x 20g/m +.. )

- CF(Correction Factor) x 100

❈ CF = Max. number of connectable indoor unit – Total number of connected indoor unit

Additional Charge Calculation Example-1

Model

Standard
length(m)

Max piping for

one room(m)

Max total Piping

Length(m)

Additional

Charge(g/m)

A3UW186FA3[FM19AH]

7.5 25 40 20

A3UW216FA3/4[FM21AH]

7.5 25 50 20

A4UW246FA3/4[FM25AH]

7.5 25 70 20

A4UW276FA3[FM27AH]

7.5 25 70 20

A5UW306FA3[FM30AH]

7.5 25 75 20

A5UW406FA3[FM38AH]

7.5 25 85 20

Multiple Piping Models

ModelPhase

Main Piping length Branch piping length

Standard

length(m)

Additional

refrigerant(g/m)

Standard

length(m)

Additional

refrigerant(g/m)

A7UW406FA2/3[FM40AH]

550520

1Ø

A8UW486FA3[FM48AH]

550520

A9UW566FA3[FM56AH]

550520

A7UW428FA3[FM41AH]

550520

3Ø

A8UW488FA3[FM49AH]

550520

A9UW548FA3[FM57AH]

550520

Distributor type Models

10 Multi Air Conditioner

Installation of Indoor, Outdoor Unit

Preparing work for Installation (ART COOL 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

Panel Front

Connector

Pipe hole

rubber cap

Only one

desiring direction

Connecting

part

Adhesive

Drain
hose

Installation Manual 11

ENGLISH

Installation of Indoor, Outdoor Unit

• Drill the piping hole with a Ø65mm 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

Sticking the installation guide map and fixing Indoor unit (ART COOL Type Only)

Plastic anchors

INSTALLATION GUIDE MAP

10mm

INSTALLATION GU

INSTAIIATIO

N G

UID

E M

AP

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 four 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 wall.

Drill the piercing part for connecting pipe as diameter
Ø65mm. (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

INSTA

LLATIO

N G

UIDE M

A

P

Hanger hole

(Rear side of

product)

12 Multi Air Conditioner

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 bar in the dimension

shown in the table below.

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"

Flaring Work and Connection of Piping