LG AUUH488C INSTALLATION MANUAL

ENGLISH ESPAÑOL

LG
Air Conditioner

INSTALLATION MANUAL

LG

website http://www.lgservice.com

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.

2 Air Conditioner

Air Conditioner Installation Manual

TABLE OF CONTENTS

Safety Precautions .....3

Installation of Indoor,

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

The indoor unit

installation...................9

Remote controller

installation.................23

Wiring connection ....24

Connecting Pipes to

the Indoor Unit..........26

Installation to

decorative panel .......28

Indoor unit drain

piping.........................29

Test running..............32

Optional operation....34

Installation guide

at the seaside ............40

•

Connecting cable

• Four Type "A" Screw

• Hanging Bolt
(W 3/8 or M10 length 650 mm)

• Pipes: Gas side

Liquid side

• Insulated drain hose

• Additional Drain hose
Inner Dia

Cassette type............32 mm

Duct type...................25 mm

Convertible type........25 mm

•

Level

•

Screw driver

•

Electric drill

•

Hole core drill (ø70 mm)

• Flaring Tools set

• Torque Wrenches

• Hexagonal Wrench (4 mm, 5 mm)

• Gas-leak detector

•

Owner’s Manual

•

Thermometer

Installation

Requirements

Required Parts Required T ools

Safety Precautions

Installation Manual 3

ENGLISH

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.

WARNING

Be sure not to do.

Be sure to follow the instruction.

Safety Precautions

■ Installation

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.

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 r isk of
fire or electric shock.

Always ground the product.

• There is risk of fire or
electric shock.

WARNING

CAUTION

4 Air Conditioner

Safety Precautions

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.

It is recommended to install the indoor unit
into the one big space, rather than into the
some small spaces.

■ Operation

Gasolin

Installation Manual 5

ENGLISH

Safety Precautions

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.

CAUTION

■ Installation

90˚

6 Air Conditioner

Installation of Indoor, Outdoor Unit

Installation of Indoor, Outdoor Unit

1. Indoor unit
Cassette type

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

• There should not be any obstacles to prevent
the air circulation.

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

• A place where drainage can be easily
obtained.

• A place where noise prevention is taken into
consideration.

• Do not install the unit near the door way.

• Ensure the spaces indicated by arrows from
the wall, ceiling, or other obstacles.

• The indoor unit must keep the maintenance
space.

Duct type

• 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

Selection of the best location

Unit:cm

Ceiling

Ceiling Board

Ceiling Board

30 or more

Above 250

330 or less

100

or more

50 or
more

50 or
more

30 or less

Floor

Top view

(unit: mm)

Front view

Inspection hole

(600 X 600)

Control box

1000

Front

600600

H

Installation of Indoor, Outdoor Unit

Installation Manual 7

ENGLISH

Convertible type

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

• There should not be any obstacles to prevent
the air circulation.

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

• A place where drainage can be easily
obtained.

• A place where noise prevention is taken into
consideration.

• Do not install the unit near the door way.

• Ensure the spaces indicated by arrows from

the wall, ceiling, or other obstacles.

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

200 mm

More than eye-level

More than

200 mm

More than
500 mm

Fence or

obstacles

R

(Ceiling installation)

R

(Floor/Wall installation)

Sunroof

More than

200 mm

More than

200 mm

More than

More than

30cm

500 mm

More than 500 mm

More than 1000 mm

8 Air Conditioner

Installation of Indoor, Outdoor Unit

3. Piping length and the elevation

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

4. Refrigerant Additional Charging Method

For additional charging method, see below table.

<Ref. Addition charging method>

❈ (L1=Main Pipe, L2~L5 : Branch Pipe

CAUTION:

• Rated performance for refrigerant line length of:7.5m

• 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.

• 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 a gas pipe of Ø19.05 by using the socket in the indoor unit and connect
remaining those by cutting or direct insertion to the diameter of pipe.

• Don’t use the liquid pipe by too bending or twisting.

Pipe Length(m)

Total(Main+Branch)
Main Pipe(L1)
Branch Pipe----Total

Each
In out (h1)
In-In (h2)
L1+L2/L3/L4/L5
Indoor-Indoor_(b)

Spec.

110

50
60
15
30

1
65
10

Branch

Main (L1)

h1

b

L2
L3

L4

L5

h2

Single (L1-30)*0.07

Duo (L1-30)*0.07+(L2+L3-20)*A

Trio (L1-30)*0.07+(L2+L3+L4-20)*A

Quartet (L1-30)*0.07+(L2+L3+L4+L5-20)*A

Branch pipe

Liquid side

Ø6.35 0.03
Ø9.52 0.05

A

Installation Manual 9

ENGLISH

• 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.

CAUTION:

•

This air-conditioner uses a drain pump.

• Horizontly install the unit using a
level gauge.

•

During the installation, care should be
taken not to damage electric wires.

• Thoroughly study the following installation locations:

1. In such places as restaurants and kitchens, considerable amount of oil steam and flour
adhere to the turbo fan, the fin of the heat exchanger and the drain pump, resulting in heat
exchange reduction, spraying, dispersing of water drops, drain pump malfunction, etc.
In these cases, take the following actions:

• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has

sufficient capacity so that it draws oily steam which should not flow into the suction of the
air conditioner.

• Make enough distance from a cooking room to install the air conditioner in such a place
where it may not suck in oily steam.

2. Avoid installing air conditioner in such circumstances where cutting oil mist or iron powder is
in suspension in factories, etc.

3. Avoid places where inflammable gas is generated, flows in, is stored or vented.

4. Avoid places where sulfurous acid gas or corrosive gas is generated.

5. Avoid places near high frequency generators.

NOTICE

The indoor unit installation

• The dimensions of the paper model for installing are the same as those of the ceiling opening dimensions.

Ceiling board

Level gauge

Ceiling

Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.

Cooking table

Air conditioner

Take enough
distance

Unit:mm

744 Unit size

744 Unit size

658 (Hanging bolt)

6666

790 (Ceiling opening)

790 (Ceiling opening)

572(Hanging bolt)

109

109

Unit:mm

570 Unit size

570 Unit size

450 (Hanging bolt)

7575

600 (Ceiling opening)

600 (Ceiling opening)

521(Hanging bolt)

39.5

39.5

Unit:mm

840 Unit size

840 Unit size

672 (Hanging bolt)

101.5101.5

875 (Ceiling opening)

875 (Ceiling opening)

785 (Hanging bolt)

45

45

The indoor unit installation

1. Cassette type

10 Air Conditioner

Wall

5~7 mm

Indoor Outdoor

Set screw of
paper model (4 pieces)

Paper model
for installation

Ceiling board

150mm

Adjust the same height

Ceiling board

Ceiling

Flat washer for M10

(accessory)

Keep the length of the bolt

from the bracket to 40mm

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

The Indoor Unit Installation

• The following parts is option.
Hanging Bolt - W 3/8 or M10
Nut - W 3/8 or M10
Spring Washer - M10
Plate Washer - M10

CAUTION:

Tighten the nut and bolt

to prevent unit falling.

• Drill the piping hole on the wall slightly tilted to the
outdoor side using a Ø 70 hole-core drill.

The Indoor Unit Installation

Installation Manual 11

ENGLISH

2. Duct type

CASE 1

POSITION OF SUSPENSION BOLT

• Apply a joint-canvas between the unit and
duct to absorb unnecessary vibration.

• Apply a filter Accessory at air return hole.

(Unit:mm)

Dimension

Capacity

18 kBtu/h
24 kBtu/h

30 kBtu/h
36 kBtu/h

48 kBtu/h

ABCDEF(G)HI

932 880 355 45.5 450 30 87 750 163

1232 1182 355 45.5 450 30 87 830 186

1292 1230 477 56 590 30 120 1006 294

CASE 2

I

A
B

(G)

H

Drainage hole

EF

C

D

• Install the unit leaning to a drainage hole
side as a figure for easy water drainage.

POSITION OF CONSOLE BOLT

• 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

med.

perfor

M10 Nut
M10 SP. washer
M10 washer

M10 washer
M10 SP. washer
M10 Nut

X 4
X 4
X 4

X 4
X 4
X 4

(Local
supply)

(Local
supply)

12 Air Conditioner

The Indoor Unit Installation

CAUTION:

Tighten the nut and bolt top

revent unit falling.

• 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

.

Old building New building

1 Set anchor
2 Plate washer
3 Spring washer
4 Nut

5 Suspension
bolts

• Local supply
Set anchor
Plate washer - M10
Spring washer - M10
Nut - W3/8 or M10
Suspension bolt - W3/8 or M10

The Indoor Unit Installation

Installation Manual 13

ENGLISH

CAUTION

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 5 mm.

Front of view

• The unit must be horizontal or declined to the drain hose connected when finished

installation.

Ceiling

1~3 mm

CORRECT

Drainage hole

CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING

• Always lay the drain with downward
inclination (1/50 to 1/100).
Prevent any upward flow or reverse flow
in any part.

• 5mm or thicker formed thermal insulator
shall always be provided for the drain
pipe.

INCORRECT

Drainage hole

Lay the drain hose with a downward
inclination so water will drain out.

Thermal insulator

Unit

Make sure to be closed.

Drainage hole

(Local supply)

Drainage pipe
(Local supply)

CORRECT

• Install the P-Trap (or U-Trap) to prevent
a water leakage caused by the blocking
of intake air filter.

• Upward routing not
allowed

INCORRECT

Applied U-Trap Dimension

A 70 mm
B 2C
C 2 x SP
SP = External Pressure

(mmAq)

Ex) External Pressure

= 10 mmAq
A 70 mm
B 40 mm
C 20 mm

C

A

B

U-Trap

14 Air Conditioner

The Indoor Unit Installation

3. Convertible type

■

Before Installing, prepare Installation Plates

• 'Installation Plates' are attached at the bottom of
indoor unit.
Detach them by removing each 3 screws at both
sides.

• Detach 'Side Plate (R,L)' by removing each 2
screws on both sides.

• Pull the upper right and left side of 'Inlet Grille' to
the front, and it will stop at slightly tilted position.

• Unhook the 'Inlet hanger' from the 'Hanger
screw' on the both left and right side.

• Detach the 'Inlet Grille' from the Indoor Unit.

Installation on the ceiling

• Measure and mark the position for the
Suspension bolts and the piping hole.

• Drill the hole for anchor nut on the ceiling.

Before secure the Installation Plates, select
the bent direction of the Installion Plate to
the inside or the outside according to the
installation circumstances.

• Drill the piping hole on the wall slightly tilted to
the outdoor side using a ø70 hole-core drill.

Side Plate

Install Plate

Inlet Grille

1)

2)

1076

Suspension

1236

bolt

Center-line for the

Inlet hanger

Hanger

screw

265

piping hole

265

Indoor Outdoor

WALL

5~7 mm

The Indoor Unit Installation

Installation Manual 15

ENGLISH

• Insert the nuts and washer onto the suspension
bolts for locking the suspension bolts on the
ceiling.

• Mount the suspension bolts to the anchor-nuts
firmly.

• Secure the Installation plates onto the
Suspension bolts (adjust level roughly.) using
nuts, washers and spring washers.

• Engage 2 hooks on the both left and right side
of the unit to the lower slot of Installation Plates.

• Adjust a level with a level gauge on the direction
of left-right, back-forth by adjusting suspension
bolts.

• Move the hooks on the unit to the upper slot of
Installation Plates.Then the unit will be declined
to the bottomside so as to drain well.

1)

2)

Suspension

bolts

Spring
washer

Max.

12mm

Anchor nut

Ceiling

Nut

Suspension

bolts

Nut

Washer

Lower slot

Level gauge

Washer

R

Suspension

bolt

Adjust a level

Installation plate

R

Upper slot

R

16 Air Conditioner

The Indoor Unit Installation

1. Install declination of the indoor unit is very important for the drain of the
convertible type air conditioner.

2. Minimum thickness of the insulation for the connecting pipe shall be 7 mm.

3. If the Installation Plates are fixed to horizontal line, the indoor unit after installing
will be declined to the bottomside.

Front of view

• The unit must be horizontal or declined to the drain hose connected when finished
installation.

• The unit must be declined to the bottomside of the unit when finished installation.

Side of view

CAUTION

Ceiling

Drain hose

Ceiling

Ceiling

The Indoor Unit Installation

Installation Manual 17

ENGLISH

• Secure the unit to the Installation Plates with
four M8 bolts and washers.

• Hook up the Inlet Grille Hook to the cabinet.

• Hang the Inlet Hanger to the screw.

• Fit the projection hooks of the side plates to the

'Side Panel' and the 'Front Panel' by
lifting it.

• Fasten the screws.

R

•

Before working, refer to "Connecting pipe to

Indoor Unit" on page 21.

Inlet hanger

R

Hook

Cabinet Bottom

R

1

R

2

18 Air Conditioner

The Indoor Unit Installation

Installation on the Wall

• 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 nut on the wall.

• Drill the piping hole on the wall slightly tilted to
the outdoor side using a ø70 hole-core drill.

• Secure the 'Install Plate' onto the wall with four

anchor bolts, washers and spring washers.

Before secure the Install Plates, select the bent
direction of the 'Install Plate' to the inside or
outside according to the installation
circumstances.

more than

1076

260

265

Wall

Indoor Outdoor

5~7 mm

Spring
washer

Nut

Washer

Anchor nut

Less than

12 mm

Wall

1236

The Indoor Unit Installation

Installation Manual 19

ENGLISH

Install the Indoor unit onto Installation Plate.

• Insert 2 hooks on the both left and right side of
the unit to the inner slot (wall side) of the
Installation Plate.

• Secure the unit to the Installation Plate with four
M8 bolts and washers.

• Hook up the Inlet Grille Hook to the cabinet.

• Hang the Inlet Hanger to the screw.

• Fit the projection hooks of the side plates to the

'Side Panel' and the 'Front Panel' by
lifting it.

• Fasten the screws.

R

2

1

•

Before working, refer to "Connecting pipe

and cable to Indoor Unit" on page 21.

Inner slot

20 Air Conditioner

The Indoor Unit Installation

Installation on the floor

Installation of Mount Bracket.

• Select and mark the position for Mount
Brackets and the piping hole.

• Drill the hole for the anchor nut on the wall.

• Drill the piping hole using a ø70 hole-core drill.

• Secure the Mount Brackets on the wall with four

M4 screws.

Install the indoor unit onto the Mount Brackets.

• Engage the slot at the back of the unit with
Mount Bracket.

• Drill the piping hole with 70mm dia, hole core
drill.

• Piping hole should be slightly slant to the
outdoor side.

After Installing, reassemble detached parts.

• Hang the 'Inlet Grille' and hook the 'Inlet Hanger'
to the Hanger Screw.

• Assemble the 'Side Plates(R,L)' with 2 screws
on both left and right side.

From the left wall
more than 760 mm

From the
right wall
more than 840 mm

Slot

Floor mount

bracket

Wall

Indoor Outdoor

448 mm

5~7 mm

Slot

Wall

Floor mount
bracket

Install plate

Piping hole

The Indoor Unit Installation

Installation Manual 21

ENGLISH

Installation on the ceiling
(Connecting the pipes to the indoor unit)

The pipe can be connected to right side, bottom
or back of the unit.

1. For the Right Side Piping

• After bending an end of the connecting tube,
align the center of the pipings and sufficiently
tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench
until the wrench clicks.

• Connect the Drain Hose insulated to the drain
outlet. Drain hose should be go through under
the Hose Bracket as shown in figure .

• Hang the drain hose on the hose hanger and fix
it to the hole of the hose bracket with a screw.

2. For the Bottom Side Piping

• Remove the knock-out on the bottomside of Inlet
Grille

• Align the center of the pipings and sufficiently
tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench
until the wrench clicks.

• Connect the Drain Hose insulated to the drain
outlet.

• Hang the drain hose on the hose hanger and fix

it to the hole of cabinet bottom with a screw.

Connecting the Drain Hose

• The drain hose can be connected to not only the
right side but also left side of the unit.

• If the drain hose is connected to the left side, it
should go through the cabinet bottom.

• Hang the drain hose on the hose hanger and fix
it to the hole of cabinet bottom with a screw.

R

Drain Hose

Hose Hanger

Piping

Hose

Bracket

1

3

4

5

2

Hose Hanger

Hose
Hanger

R

R

BOTTOM

Drain Hose

22 Air Conditioner

The Indoor Unit Installation

Installation on the wall or floor
(Connecting the pipes to the indoor unit)

1. For the Right Rear Piping

• Remove the knock-out at the back side of the
cabinet.

• After bending an end of the connecting tube,
align the center of the pipings and sufficiently
tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench
until the wrench clicks.

• Connect the Drain Hose insulated to the drain
outlet.

• Tape the Drain Hose to the pipings to avoid
coming off the drain-outlet.

2. For the Right Side Piping

• After bending an end of the connecting tube,
align the center of the pipings and sufficiently
tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench
until the wrench clicks.

• Connect the Drain Hose insulated to the drain
outlet.

• Tape the Drain Hose to the pipings to avoid
coming off the drain-outlet.

3. For the Right Bottom Piping

• Align the center of the pipings and sufficiently
tighten the flare nut with fingers.

• Finally, tighten the flare nut with torque wrench
until the wrench clicks.

• Connect the Drain Hose insulated to the drain
outlet.

Connecting the Drain Hose

• The drain hose can be connected to not only
right side but also left side of the unit.

Piping

Taping

Drain Hose

Piping

Taping

Drain Hose

Piping

Taping

Drain Hose
Connecting

Cable

Drain Hose

REAR

BOTTOM

Installation Manual 23

ENGLISH

Remote Controller Preparation (Convertible type)

Remote control

box body

Cord clamp
(accessory)

Lever carefully

the box open

using a screw

driver, etc.

Front case

The lower part

Face of wall

Under plate

Screw (accessory)

Remote Controller Installation

HO

W TO MOUNT ONTO A WALL

HOW TO INSERT BATTERIES

1. Remove the battery cover from the remote
controller.

• Slide the cover according to the arrow direction.

2. Insert the two batteries.

• Be sure that the (+) and (-) directions are

correct.

• Be sure that both batteries are new.

3. Re-attach the cover.

• Slide it back into position.

• Fix the under plate on the wall

• Separate the under plate from Remote control box.

• Fix the cord clamps on the wall by
ø 3 tapping screws (accessory).

• Fix the remote control cord.

DISASSEMBLING

ELECTRICAL

WIRING

Wire and make sure that terminal

numbers are matched on unit side and

remote controller side.

The maximum length of the cord is 100m.

If the length of the cord exceeds 50m,

use a wire size greater than 0.5mm

2

.

(Main board)

CN REMO

• Do not use rechargeable
batteries, such batteries differ
from standard dry cells in
shape, dimensions, and
performance.

• Romove the batteries from the
remote controller if the air
conditioner is not going to be
used for some long time.

Wired Remote Controller Installation

24 Air Conditioner

Wiring Connection

• Open the control box cover and connect the Remote controller cord and Indoor power wires.

[Air inlet side view]

Control box cover

Indoor

power cord

Remote

controller

cord

Control box cover screw

Terminal Block
(Outdoor Unit)

Terminal Block
(Indoor Unit)

The power cord connected to the outdoor unit should be
complied with the following specifications (Rubber
insulation, type H05RN-F approved by HAR or SAA).

If the supply cord is damaged, it must be replaced by a special cord or assembly available from the manufacturer of its service agent.

The connecting cable connected to the indoor and outdoor
unit should be complied with the following specifications
(Rubber insulation, type H05RN-F approved by HAR or SAA).

CAUTION

20mm

G

N

/Y

L

NORMAL
CROSS-SECTIONAL
AREA 1.25mm

2

NORMAL
CROSS-SECTIONAL
AREA 5.5mm

2

20mm

G

N

/Y

L

WARNING:

Make sure that the screws of the terminal are free from looseness.

Wiring Connection

Installation Manual 25

ENGLISH

Electrical Wiring

Wiring Connection

1. All wiring must comply with LOCAL REGULATIONS.

2. Select a power source that is capable of supplying the current required by the air conditioner.

3. Feed the power source to the unit via a distribution switch board designed for this purpose.

4.The ter minal screws inside the control box may be loose due to vibration during transport.
Check the screws for loose connection.
(Running the air conditioner with loose connection can overload and damage electrical
components.)

5. Always ground the air conditioner with a grounding wire and connector to meet the LOCAL
REGULATION.

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.

Air

Conditioner

Main power source

Circuit Breaker
Use a 50A circuit breaker
or time delay fuse.

1. Open the control board cover
from the outdoor unit by
removing the screws.

2. Connect wires to the terminals
on the control board
individually and secure the
cables onto the control board
with clamp.(Pass through the
designated position)(See Fig.)

3. Secure the control board cover
to the original position with
the screws.

CAUTION: Perform
grounding

• This product should be

grounded.

• Defective grounding could

cause an electric shock.

Connecting the cables to the outdoor unit

Connecting
Cable

Power supply
Cord

26 Air Conditioner

Connecting Pipes to the Indoor Unit

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 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 dedicated
flaring tool for R-410A 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 below.

• 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 =

Outside diameter "A"

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

Connecting Pipes to the Indoor Unit

Preparation of Piping

Installation Manual 27

ENGLISH

Connecting Pipes to the Indoor Unit

1. Form the piping according to its routing. Avoid bending and bending back the same piping point
more than three times. (This will result in hardening the pipe.)

2. After deforming the piping, align centers of the union fitting of the indoor unit and the piping, and
tighten them firmly with wrenches.

3. Connect pipe to the service valve or ball valve which is located below the outdoor unit.

4. After completing the piping connection, be sure to check if there is gas leakage in indoor and
outdoor connection.

After completing the piping connection, execute vacuum drying for the connecting piping and the
indoor unit.
The vacuum drying must be carried out using the service por ts of both the liquid and gas side
valves.

CAUTION:

Use two wrenches and

tighten with regular torque.

Union

Piping Connection

Vacuum drying

Pipe size Torque

mm inch kgf·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

28 Air Conditioner

Installation to Decorative Panel

1.Temporarily fix two decorative panel fixing screws (hexagon M5 screw) on the unit body.
(Tighten by amount 10mm in length.)
The fixing screws (hexagon M5 screw) are included the decorative panel box.

2. Remove the air inlet grille from the decorative panel.(Remove the hook for the air inlet grille
cord.)

3. Hook the decorative panel key hole ( ) on the screws fixed in step above, and slide the
panel so that the screws reach the key hole edge.

4. Retighten completely two temporarily fixed screws and other two screws. (Total 4 screws)

5. Connect the louver motor connector and display connector.

6. After tightening these screws, install the air inlet grille (including the air filter).

Decorative panel fixing screws
(hexagon M5 screws)
Temporally fitting at 2 places
(Tightening about 10 mm)

Install the panel after
making sure that the
piping side of the unit body
matches the piping
indication of the decorative
panel

Control box cover

Piping side

Inlet GrilleInlet GrilleInlet Grille

Inlet GrilleInlet Grille

Louver motor

Decorative panel fixing screws
(Hexagon M5 screw)

The arrow ( ) should point
to the side where the pipes are.

Air conditioner unit

Decorative panel

Key holes

Display

Lead wire for
louver motor and
display

The decorative panel has its installation
direction.

Before installing the decorative panel,
always remove the paper template.

Installation to Decorative Panel

Installation Manual 29

ENGLISH

Indoor Unit Drain Piping

CAUTION:

Install certainly the decorative panel.

Cool air leakage causes sweating.

Water drops fall.

• 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 32 mm.

• Be sure to execute heat insulation on the
drain piping.

• Install the drain raising pipes at a right
angle to the indoor unit and no more than
300 mm from the unit.

The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:

• 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.

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

Maintenance
drain port

Upward
routing
not allowed

Pipe clamp

Indoor unit

700 or less

1 -1.5 m

300 mm or less

Clamp metal(attached) Drain hose(attached)

Drain raising pipe

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)

Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings

Heat insulation material: Polyethylene foam with thickness more than 8 mm.

Drain test

Indoor Unit Drain Piping

30 Air Conditioner

Indoor Unit Drain Piping

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance
(over 120°C).

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), 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
20 mm.

• Stick glass wool on all air conditioners that

are located in ceiling atmosphere.

Indoor unit

Thermal insulator
(accessory)

Fastening band
(accessory)

Refrigerant piping

Heat insulation

Forming the piping

Form 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 tapped piping along the exterior
wall using saddle or equivalent.

Gas side
piping

Main cable

Tube PE

Foam

Connecting
Cable
(For heater)

Connecting
Cable

Trap is required to prevent the electrical parts
from entering the water.

Indoor Unit Drain Piping

Installation Manual 31

ENGLISH

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. Fix the piping onto the wall by saddle or
equivalent.

Trap

Trap

Seal a small opening around
the piping with gum type sealer.

32 Air Conditioner

Test running

1. PRECAUTIONS IN TEST RUNNING

• The initial power supply must provide at least 90% of the rated voltage.
Otherwise, the air conditioner should not be operated.

CAUTION For test run, carry out the cooling operation firstly even during heating

season. If heating operation is carried out firstly, it leads to the trouble
of compressor.Then attention must be paid.

Carry out the test run more than 5 minutes without fail.
(Test run will be cancelled 18 minutes later automatically)

• The test run is started by pressing the room temperature checking button and down timer
button for 3 seconds at the same time.

• To cancel the test run, press any button.

CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETE

• After completing work, be sure to measure and record trial run properties, and store measured
data, etc.

• Measuring items are room temperature, outside temperature, suction temperature, blow out
temperature, wind velocity, wind volume, voltage, current, presence of abnormal vibration and
noise, operating pressure, piping temperature, compressive pressure.

• As to the structure and appearance, check following items.

2. Connection of power supply

1. Connect the power supply cord to the independent power supply.

• Circuit breaker is required.

2. Operate the unit for fifteen minutes or more.

3. Evaluation of the performance

1. Measure the temperature of the
intake and discharge air.

2. Ensure the difference between the
intake temperature and the discharge
one is more than 8°C (Cooling) or
reversely (Heating).

Is the circulation of air adequate?
Is the draining smooth?
Is the heat insulation complete

(refrigerant and drain piping)?

Is there any leakage of refrigerant?

Is the remote controller switch operated?
Is there any faulty wiring?
Are not terminal screws loosened?

M4......118 N.cm{12 kgf.cm} M5......196 N.cm{20 kgf.cm}

M6......245 N.cm{25 kgf.cm} M8......588 N.cm{60 kgf.cm}

Test running

Thermometer

Installation Manual 33

ENGLISH

CAUTION: After the confirmation of the above conditions, prepare the wiring

as follows:

1) Never fail to have an individual power specialized for the air conditioner.
As for the method of wiring, be guided by the circuit diagram pasted on
the inside of control box cover.

2) Provide a circuit breaker switch between power source and the unit.

3) The screw which fasten the wiring in the casing of electrical fittings are
liable to come loose from vibrations to which the unit is subjected
during the course of transportation. Check them and make sure that
they are all tightly fastened. (If they are loose, it could give rise to burn­out of the wires.)

4) Specification of power source

5) Confirm that electrical capacity is sufficient.

6) Be sure that the starting voltage is maintained at more than 90 percent
of the rated voltage marked on the name plate.

7) Confirm that the cable thickness is as specified in the power sources
specification.
(Particularly note the relation between cable length and thickness.)

8) Never fail to equip a leakage breaker where it is wet or moist.

9) The following troubles would be caused by voltage drop-down.

• Vibration of a magnetic switch, damage on the contact point there of, fuse
breaking, disturbance to the normal function of a overload protection device.

• Proper starting power is not given to the compressor.

10) Use only 1 remote-controller contained in the Cassette type indoor unit,
when you combine to use both cassette type indoor unit and different
kind of indoor unit.
After setting the ESP value in the Duct Type Indoor Unit, the main
power turns off and then remove the remote controller.

HAND OVER

Teach the customer the operation and maintenance procedures, using the operation manual
(air filter cleaning, temperature control, etc.).

Test running

34 Air Conditioner

1.Two Thermistor System

(1) Open the rear cover of the wired remote-controller to set the mode.
(2) Select one of three selectable modes as follows.

• Position 1:The room temperature is controlled by the thermistor of the main body.

• Position 2:The room themperature is controlled by the thermistor of the wired remote-

controller, control the temperature according to the position of wired remote­controller.

• Position 3:The room temperature is controlled by lower temperature between the
temperature of main body and of remote-controller sensor.

(3) Move the slide switch to set position.

(4) Close the rear cover and check if it works normally.

CAUTIO

N

:

• Select the position after counselling with a customer.

• In case of cooling mode, room temperature is controlled by the main body sensor.

• To control the room temperature by a wired remote controller, install controller(room

temp. sensor) to sense the temperature more accurately.

• Manufactured in the position 3.

Optional Operation

Optional Operation

TH

R14H

SW TH

REMO
MAIN
2TH

OP7
R18H

R17H

OP6

LO

STAND

SW HIGH

HI

R03S

C070

R04S

R02S

R01S

OP3

OP2 OP1

R19H

R11H

R13H R12H

OP5R16H OP4

R15H

CO1H

REMO

Room T emp . sensor

2TH

MAIN

Position 2
Position 1
Position 3

Slide switch for ceiling height

Slide switch for 2 Thermistor

Installation Manual 35

ENGLISH

2. Adjusting air volume to the height of ceiling (Cassette type)

You can choose the RPM(or air volume) of indoor motor according to the height of ceiling to
supply the comfortable atmosphere to consumers.

Procedure

1. Choose the selectable position in the table after measuring the height of ceiling.

2. In the case of changing the height as "high" or "low", open the rear cover of the wired remote­controller.

3. Move the slide switch to the set position.

4. Close the rear cover and check if it works normally.

Optional Operation

Ceiling height Mode of slide switch Change of air volume Remark

more than 3.3 m High Ceiling Increasing

2.7~3.3 m Standard -

Manufactured in

less than 2.7 m Low Ceiling Decreasing

standard mode

Slide switch for 2 Thermistor

R13H R12H

TH

OP5R16H OP4

CO1H

Low ceiling

Standard
(Default)

High Ceiling

STAND

Slide switch for ceiling height

Lo

Hi

OP3

R14H

SW TH

REMO
MAIN
2TH

STAND

SW HIGH

OP2 OP1

R17H

LO
HI

OP7
R18H

R15H

R19H

R11H

OP6

C070

R03S

R04S

R01S

R02S

36 Air Conditioner

Optional Operation

3. E.S.P.(External Static Pressure) Setting (Duct type)

(1) Open the rear cover of the wired remote-controller to set the mode.
(2) Select one of three selectable modes as follows.

■ Without Zone System

1. Position V-H, F-H:

• This position sets the maximum E.S.P as a default set.

2. Position V-L:

• This position sets the minimum E.S.P as a default set.

■ With Zone System

1. Position V-H:

• Maximum E.S.P setting & Fan speed is varied according to the state of dampers bymicom.

2. Position F-H:

• Maximum E.S.P setting & Fan speed doesn't vary according to the opening & Closing of dampers.

3. Position V-L:

• Minimum E.S.P setting & Fan speed is varied according to the state of dampers bymicom.

* Maximum : 24K-6mmAq

Minimum : 0mmAq

(3) Move the slide switch to set position.

(4) Close the rear cover and check if it works normally.

TH

R14H

SW TH

REMO
MAIN
2TH

OP7
R18H

R17H

OP6

LO

STAND

SW HIGH

HI

R03S

C070

R04S

R02S

R01S

OP3

OP2 OP1

R19H

R11H

R13H R12H

OP5R16H OP4

R15H

CO1H

V-L

V-H

F-H

Slide switch for ceiling height

• Select the position after checking duct work and E.S.P of the unit.

• Maunfactured in the position F-H.

CAUTION:

Installation Manual 37

ENGLISH

Optional Operation

4. How to Set E.S.P?

Preheat

ZONE

Operation unit Program set

Room Temp

MED
LO

AUTO
JET

Heater
Defrost
Filter

Humidify
Out door

Timer

On
Set no. Time

Off

01 03 05 07 09 11 13 15 17 19 21 23

1234

OPERATION

FAN SPEED

SUB FUNCTION

SET TEMP

HI

AUTO SWING

Time

Preheat

ZONE

Operation unit Program set

Room Temp

MED
LO

AUTO
JET

Heater
Defrost
Filter

Humidify
Out door

Timer

On
Set no. Time

Off

01 03 05 07 09 11 13 15 17 19 21 23

1234

OPERATION

FAN SPEED

SUB FUNCTION

SET TEMP

HI

AUTO SWING

Time

Time

SUB FUNCTION

SET TEMP

OPERATIONAUTO SWING

Preheat

ZONE

Operation unit Program set

Room Temp

MED
LO

AUTO
JET

Heater
Defrost
Filter

Humidify
Out door

Timer

On
Set no. Time

Off

01 03 05 07 09 11 13 15 17 19 21 23

1234

FAN SPEED

HI

Time

SUB FUNCTION

SET TEMP

OPERATIONAUTO SWING

Preheat

ZONE

Operation unit Program set

Room Temp

MED
LO

AUTO
JET

Heater
Defrost
Filter

Humidify
Out door

Timer

On
Set no. Time

Off

01 03 05 07 09 11 13 15 17 19 21 23

134

FAN SPEED

HI

2

Timer

1

2

3

5

4

Timer

Procedure of RPM change:

Ex) External Static pressure is 6mmAq for 36 kBtu/h.

• To protect the unit, compressor is designed to be off during E.S.P. setting.

Push the "On/Off" button.
The unit will start.

Push the "Timer" and "Wind" button simultaneously for more then 3 seconds.

Push the "Up" of "Down" button for E.S.P adjustment.
And, adjust the number which you want.(In this example, the number is "220". Refer to the
table 1 on the next page.)

Shift the fan speed mode by pressing the fan speed button.
And then, Adjust numbers of next steps by repeating the stage 3.
(In this example, the numbers are "235" and "243" respectly)

Push the "Timer" and "Wind" button simultaneously for more than 3 seconds.
Then, Wind Data is memorized by the EEPROM of the main PCB.

Note: The range of selection is from 1~254.Since, the display is two Digit only.

If the range selection is above 100 then the third digit will appear in the screen as shown.

38 Air Conditioner

Optional Operation

[Table. 1]

Note: 1. Be sure to set the value refering table 1. Unexpected set value will cause mal-

function.

2.Table 1 is based at 230V. According to the fluctuation of voltage, air flow rate varies.

Static Pressure(mmAq)

CMM(CFM)

Model Name

18 kBtu/h Med 14.5(512) 245 238 235 230

24 kBtu/h Med 16.5(583) 235 230 220 200

30 kBtu/h Med 23(812) 173 173 175 175 170

36 kBtu/h Med 29(1024) 240 238 237 235 230

48 kBtu/h Med 35(1235) 250 245 240 235 230 220 215 210 200

Step

High 16.5(583) 235 230 225 215 180

Low 13(459) 254 252 248 245

High 18(636) 220 205 190 50

Low 14(494) 250 240 235 230

High 26.5(936) 153 150 150 148 130

Low 20(706) 190 190 190 190 190

High 32(1130) 230 230 225 220 150

Low 26.5(936) 245 245 243 243 240 240

High 40(1412) 230 225 220 215 205 200 190 180

Low 30(1059) 255 255 255 250 245 240 235 230

Setting Value

215
240

1
100
210

1
155
190

1
220

150 2 4 6 8 10 12 14

160

225

Installation Manual 39

ENGLISH

Optional Operation

TEST_SW1

LED01T

1234

ZONE SW1

Main PCB

Fig.a Outdoor PCB diagram

C

B

JIG_SW

A

E

D

3. Auto Addressing Method
Addressing work assigns address to each
indoor unit.When firstly installing product or
replacing the indoor unit PCB.Auto Addressing
work should be done for simultaneous
operation.

❈

Work procedure

1) Set JIG_SW and ZONE SW1 correctly.

2) Turn on main power.

3) Press the TEST_SW1 for about 3 seconds
within 3minutes After main power on.(

)

4) After step 3), the LED01T(green LED) rapidly
flickers.When Addressing work is done, green
LED is off, else LED stops flickering and lights
continuously.

5) If you fail to perform the Addressing work,
repeat step 2),3).

5. Outdoor Unit PCB Setting Procedure

1. JIG_SW Setting
The position of the JIG_SW should be on the
right side. If not then please slide the position
to the right.(

)

2. ZONE SW1 Setting
Set the ZONE SW1 as below Table.a (

)

❈ S/W1 is not used.
❈ 1 means S/W up.

0 means S/W down.

❈ SW

, are unnecessary for this unit.

ZONE SW1

Indoor Unit No.

12

34

10

00

11

00

1

1

10

2(Duo)

1(Single)

3(Trio)

4(Quartet)

12

34

12

34

1

1

11

12

34

Table.a ZONE SW1 Setting

40 Air Conditioner

Installation guide at the seaside

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. Otherwise it
needs additional anticorrosion treatment on the heat exchanger.

1.

If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.

2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water

Selecting the location(Outdoor Unit)

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 windbreak not to be exposed to the sea wind.

3) Select a well-drained place.

• It should be strong enough like concrete to prevent
the sea wind from the sea.

• The height and width should be more than 150% of
the outdoor unit.

• It should be keep more than 70 cm of space
between outdoor unit and the windbreak for easy
air flow.

Sea wind Sea wind

Sea wind

Windbreak

CAUTION

Installation guide at the seaside

P/No.: 3828A20601B