LG UU36WH, UU37WH, UU49WH, UU42WH, UU43WH Installation Manual

P/NO : MFL40910618

www.lg.com

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 : High Efficiency Inverter

ENGLISH

ITALIANO

ESPAÑOL

FRANÇAIS DEUTSCH

Single A Air Conditioner Installation Manual

CONTENTS

Safety Precautions ..............................................................................................3

Installation of Outdoor Unit................................................................................6

Wiring Connection.............................................................................................10

Connecting Pipes ..............................................................................................13

Leakage test and Evacuation ...........................................................................17

Test running .......................................................................................................19

Self-diagnosis Function....................................................................................21

Installation Guide at the Seaside .....................................................................22

2 Air Conditioner

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.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

■ Installation

Be sure not to do.

Be sure to follow the instruction.

Safety Precautions

Always perform grounding.

• Otherwise, it may cause
electrical shock.

Donʼt use a power cord, a
plug or a loose socket which
is damaged.

• Otherwise, it may cause a fire
or electrical shock.

For installation of the product,
always contact the service
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 3

Safety Precautions

ENGLISH

4 Air Conditioner

Safety Precautions

Do not install the product at a place that there
is concern of falling down.

• Otherwise, it may result in personal injury.

Use caution when unpacking and installing.

• Sharp edges may cause injury.

Take the power plug out if
necessary, holding the head
of the plug and do not touch
it with wet hands.

• Otherwise, it may cause a fire
or electrical shock.

Do not use the power cord
near the heating tools.

• Otherwise, it may cause a fire
and electrical shock.

Do not open the suction
inlet of the indoor/outdoor
unit during operation.

• Otherwise, it may electrical
shock and failure.

Do not allow water to run
into electrical parts.

• Otherwise, it may cause the
failure of machine or electrical
shock.

Hold the plug by the head
when taking it out.

• It may cause electric shock
and damage.

Never touch the metal parts
of the unit when removing
the filter.

• They are sharp and may
cause injury.

Do not 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.

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.

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.

Installation Manual 5

Safety Precautions

ENGLISH

■ 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

1. Installation Places

• 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.

• Ensure that the spaces indicated by arrows
around front, back and side of the unit.

• Do not place animals and plants in the path of
the warm air.

• Take the air conditioner weight into account
and select a place where noise and vibration
are minimum.

• Select a place so that the warm air and noise
from the air conditioner do not disturb
neighbors.

More than
300mm

Fence or

obstacles

More than 700mm

More than 600mm

More than

More than

300mm

300mm

More than
300mm

Sunroof

Installation of Outdoor Unit

Installation of Outdoor Unit

2. Piping length and the elevation

■ Single Operation

If installed tube is shorter than 7.5 m, additional charging is not necessary.
Additional Refrigerant = (A -7.5) x Additional refrigerant (g)

6 Air Conditioner

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

Unit : mm

Model

Pipe Size mm(inch) Length A(m) Elevation B(m)

Additional

refrigerant

(g/m)

Gas Liquid Standard Max. Standard Max.

UU36WH/UU37WH
UU42WH/UU43WH
UU48WH/UU49WH

Ø15.88

(5/8)

Ø9.52

(3/8)

5 75 5 30 40

Installation of Outdoor Unit

• When installing the branch pipe, direction and angle of installation is not limited.

• Take care so that burrs and foreign material may not enter into the cutting surface when
connecting.

• Connect remaining those by cutting or direct insertion to the diameter of pipe.

■ Synchro Operation

Install the branch pipe so that pipe length and difference between high and low will not exceed
below Spec.

[Unit : m]

Branch

L1

H1

A

A

L2

L3

L4

L5

H2

Remote

Controller

Pipe Length & Height

Total(L1+L2+L3+L4+L5)

Main Pipe(L1)

Branch Pipe (L2+L3+L4+L5)

Each

Indoor-Outdoor (H1)

Indoor-Indoor (H2)

(L1+L2),(L1+L3),(L1+L4),(L1+L5)

A

Spec(MAX.)

80

45

40

15

30

1

70

10

Installation Manual 7

ENGLISH

■ Refrigerant Additional Charging Method

For additional charging method, see below table.

Indoor Unit Refrigerant Additional charging (g)

Duo
Trio

Quartet

Refrigerant = (L1-b) x B + (L2 + L3) x C
Refrigerant = (L1-b) x B + (L2 + L3 + L4) x C
Refrigerant = (L1-b) x B + (L2 + L3 + L4 + L5) x C

C

(g/m)

Pipe Diameter.

(mm)

Ø 6.35

Ø 9.52

35

40

b

(m)

Model

UU36WH/UU37WH
UU42WH/UU43WH
UU48WH/UU49WH

B

(g/m)

7.5 40

b : Rated performance for refrigerant line length.
C : Additional charging Refrigerant of Branch Liquid Pipe.
B : Additional charging Refrigerant of Main Liquid Pipe.

NOTICE

CAUTION:

• Capacity is based on standard length and maximum allowance length is on the
basis of reliability.

• Improper refrigerant charge may result in abnormal cycle.