LG AUUH186C, AUUH306C, AUUH246C INSTALLATION MANUAL

LG Ceiling Duct-Type
Air Conditioner

INSTALLATION MANUAL

LG

IMPORTANT

• 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.

ENGLISH ESPAÑOL

2 Ceiling Duct Type Air Conditioner

Ceiling Duct Type Air Conditioner Installation Manual

TABLE OF CONTENTS

Safety precautions .....3

Installation of Indoor,

Outdoor unit................6

Connecting Pipes to the

Indoor Unit ................15

Connecting Pipes to the

Outdoor Unit .............17

Checking the Drainage

....................................17

Connecting Cables
between Indoor Unit and

Outdoor Unit .............18

Air Purging of the
Connecting Pipes and the

Indoor Unit ...............21

Group Control ...........22

Two Thermistor

System.......................22

E.S.P (External Static

Pressure) Setting......23

How to set E.S.P?. ....24

Installation guide at the

seaside ......................25

•

Four Type “A” screws

•

Connecting cable

•

Pipes: Gas side .....1/2", 5/8", 3/4"

Liquid side .............1/4", 3/8", 1/2"

•

Insulated drain hose

•

Insulation materials

•

Additional Drain hose

(Inner Dia...............25 mm)

•

Level

•

Screw driver

•

Electric drill

•

Hole core drill (ø70 mm)

•

Flaring Tools set

•

Screw driver

•

Hexagonal Wrench
(4 mm/5 mm)

•

Gas-leak Detector

Installation

Requirements

Required Parts Required Tools

Safety Precautions

Installation Manual 3

ENGLISH

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.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage.

Be sure not to do.

Be sure to follow the instruction.

WARNING

■ Installation

Do not use a defective or
underrated circuit breaker.
Use this appliance on a
dedicated circuit.

• There is risk of fire or electric shock.

For electrical work, contact
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.

• Do not disassemble or repair the
product. There is risk of fire or
electric shock.

Always ground the product.

• There is risk of fire or electric
shock.

Install the panel and the cover
of control box securely.

• There is risk of fire or electric shock.

Always install a dedicated
circuit and breaker.

• Improper wiring or installation may
cause fire or electric shock

Use the correctly rated
breaker or fuse.

• There is risk of fire or electric shock.

WARNING

CAUTION

Safety Precautions

4 Ceiling Duct Type Air Conditioner

■ Operation

Do not modify or extend the power cable.

• There is risk of fire or electric shock.

Be cautious when unpacking and installing the
product.

• Sharp edges could cause injury. Be especially careful of
the case edges and the fins on the condenser and
evaporator.

For installation, always contact the dealer or an
Authorized Service Center.

• There is risk of fire, electric shock, explosion, or injury.

Do not install the product on a defective
installation stand.

• It may cause injury, accident, or damage to the product.

Be sure the installation area does not
deteriorate with age.

• If the base collapses, the air conditioner could fall with it,
causing property damage, product failure, and personal
injury.

Do not let the air conditioner run for a long time
when the humidity is very high and a door or a
window is left open.

• Moisture may condense and wet or damage furniture.

Do not store or use flammable gas or
combustibles near the product.

• There is risk of fire or failure of product.

Gasolin

Safety Precautions

Installation Manual 5

ENGLISH

■ Installation

CAUTION

Always check for gas (refrigerant) leakage after
installation or repair of product.

• Low refrigerant levels may cause failure of product.

Install the drain hose to ensure that water is
drained away properly.

• A bad connection may cause water leakage.

Keep level even when installing the product.

• To avoid vibration or water leakage.

Do not install the product where the noise or
hot air from the outdoor unit could damage the
neighborhoods.

• It may cause a problem for your neighbors.

Use two or more people to lift and transport the
product.

• Avoid personal injury.

Do not install the product where it will be
exposed to sea wind (salt spray) directly.

• It may cause corrosion on the product. Corrosion,
particularly on the condenser and evaporator fins, could
cause product malfunction or inefficient operation.

90°

6 Ceiling Duct Type Air Conditioner

Installation of Indoor, Outdoor Unit

1. Selection of the best location

1) Indoor unit

Select location

Install the air conditioner in the location that
satisfies the following conditions.

• The place shall easily bear a load exceeding
four times the indoor unit’s weight.

• The place shall be able to inspect the unit as
the figure.

• The place where the unit shall be leveled.

• The place shall allow easy water

drainage.(Suitable dimension “H” is necessary
to get a slope to drain as figure.)

• The place shall easily connect with the
outdoor unit.

• The place where the unit is not affected by an
electrical noise.

• The place where air circulation in the room will
be good .

• There should not be any heat source or steam
near the unit

2) Outdoor unit

• If an awning is built over the unit to prevent

direct sunlight or rain exposure, be careful
that heat radiation from the condenser is not
restricted.

• There should not be any animals or plants

which could be affected by hot air
discharged.

• Ensure the spaces indicated by arrows from

the wall, ceiling, fence or other obstacles.

More than
300 mm

More than

300 mm
More than
700 mm

Sunroof

Fence or

obstacles

H

600600

Top view

(unit: mm)

Front view

Front

Inspection hole

(600X600)

Control box

1000

Installation of Indoor, Outdoor Unit

Installation of Indoor, Outdoor Unit

Installation Manual 7

ENGLISH

3) Piping length and the elevation

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

A

Oil trap

Outdoor unit

Indoor unit

B

CAUTION:

• Rated performance for refrigerant line length of:7.5 m

• Capacity is based on standard length and maximum allowance length is on

the basis of reliability.

• Improper refrigerant charge may result in abnormal cycle.

• Oil trap should be installed every 10 meters.

Gas Liquid Standard Max. Standard Max.

7.5 50 5 30 35

7.5 50 5 30 35

1/4 "(6.35 mm)

7.5 50 5 30 35

1/2 "(12.7 mm)

1/4 "(6.35 mm)1/2 "(12.7 mm)

1/4 "(6.35 mm)5/8 "(15.88 mm)

Capacity

Pipe Size

Length A(m) Elevation B(m)

*Additional

(Diameter:Ø)

refrigerant(g/m)

18 kBtu/h

24 kBtu/h

30 kBtu/h

8 Ceiling Duct Type Air Conditioner

Installation of Indoor, Outdoor Unit

2. Indoor unit installation

■ 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

CASE 2

POSITION OF CONSOLE BOLT

(Unit:mm)

Drainage hole

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

A

B

CD

(G)

H

I

EF

ABCDEF(G)HI

18 kBtu/h
24 kBtu/h

30 kBtu/h
36 kBtu/h

932 880 355 45.5 450 30 87 750 163

Dimension

Capacity

1232 1182 355 45.5 450 30 87 830 186