LG MS07AH2 Installation Manual

Name

Quantity Shape

Installation plate

1 EA

Cloth tape

Connector

1 EA

Type "A" screw

5 EA

Type "B" screw

2 EA

Type "C" screw

2 EA

Remote control

holder

1 EA

1 EA(18 kBtu/h)
(24 kBtu/h)

The feature can be changed according to type of model.

Type “B” screw

ڸØ 9.52(3/8) ƥ Ø 12.7(1/2)
ڹ Ø 9.52(3/8) ƥ Ø 6.35(1/4)
ں Ø 15.88(5/8) ƥ Ø 12.7(1/2)

More than

300

More than

300

Sunroof

Fence or

obstacles

More than

700

More than

600

(Unit : mm)

Pipe

Reamer

Point down

1 2 3

54 6 7

INSTALLATION MANUAL AIR CONDITIONER

TYPE : WALL MOUNTED
Original instruction

ENGLISH

Operation

• 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 cable.

-

Scratches or peeling insulation on the power cables may
result in fire or electric shock, and should be replaced.

• 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.

• 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.

•

Air conditioners should not be installed in areas where

corrosive gases, such as acid or alkaline gas, are produced.

• 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.

• If outdoor unit is installed close to the sea-side, it
should avoid direct exposure to the sea wind.

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

• Always install an earth leakage circuit breaker in a wet
or moist area.

•

The earth wire should be longer than the common wires.

• As for the method of wiring, be guided by the circuit

diagram posted on the inside of control cover.

• 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.

• Confirm that electrical capacity is sufficient.

• 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.

• Open the terminal cover block before connecting the

indoor side wire.

• The indoor unit can be dropped from the wall, when

the indoor unit is not screwed correct position on the
install plate.

• To avoid nitrogen entering the refrigerant system in a
liquid state, the top of the cylinder must be higher than
its bottom when you pressurize the system.

• Inert gas (nitrogen) should be used when you check
plumbing leaks, cleaning or repairs of pipes etc.

- If you are using combustible gases including oxygen,

product may have the risk of fires and explosions.

• Installation work must be performed in accordance
with the national wiring standards by authorized
personnel only.

• This equipment shall be provided with a supply
conductor complying with the national regulation.

Operation

• 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.

• Means for disconnection must be incorporated in the
fixed wiring in accordance with the wiring rules.

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

- They are sharp and may cause injury.

• 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.

CAUTION

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.

• Install at places where it can endure the weight and
vibration/noise of the outdoor unit.

• Keep level parallel in installing the product.

- Otherwise, it may cause vibration or water leakage.

!

• Do not use copper pipes having a collapsed.

- Otherwise, the expansion valve or capillary tube may
become blocked with contaminants.

• For R410A model, use piping, flare nut and tools which
is specified for R410A refrigerant.

- Using of (R22) piping, flare nut and tools may cause

abnormally high pressure in the refrigerant cycle
(piping), and possibly result in explosion and injury.

• It is desirable that the amount of residual oil less than
40 mg/10m.

• If air enters the refrigerant system, an excessively high
pressure results, causing equipment damage or injury.

• Always check for gas (refrigerant) leakage after
installation or repair of product. Low refrigerant levels
may cause failure of product.

• Ensure that you grab the chassis when you lift the
unit.

- If you lift the unit with the panel held, it may result in

serious injury or product failure.

• Do not turn on the breaker or power under condition
that front panel, cabinet, top cover, control box cover
are removed or opened. Otherwise, it may cause fire,
electric shock, explosion or death.

• Make the connections securely so that the outside
force of the cable may not be applied to the terminals.

- Inadequate connection and fastening may generate

heat and cause a fire.

• After pump down, power must be turned off before
removing the pipe.

-

When operating this product without connecting the pipe,
there will be high pressure inside the compressor due to
the entry of air, possibly causing explosion or injury.

• If the supply cord is damaged, it must be replaced by
the manufacturer, its service agent or similarly
qualified persons in order to avoid a hazard.

• The information contained in the manual is intended
for use by a qualified service technician familiar with
safety procedures and equipped with the proper tools
and test instruments.

• Failure to carefully read and follow all instructions in
this manual can result in equipment malfunction,
property damage, personal injury and/or death.

• When the power cord is to be replaced, replacement
work shall be performed by authorized personnel only
using only genuine replacement parts.

• Air conditioner shall be disconnected from its power
source during service and when replacing parts.

Installation

• Always perform grounding.

- Otherwise, it may cause electrical shock.

• Don’t 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.

• 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.

• Thickness of copper pipes used are as shown “Flaring
work” Table.

- Never use copper pipes thinner than that in the table

even when it is available on the market.

IMPORTANT SAFETY INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE USING THE
APPLIANCE.

Always comply with the following precautions to avoid
dangerous situations and ensure peak performance of
your product.

WARNING

It can result in serious injury or death when the directions
are ignored.

CAUTION

It can result in minor injury or product damage when the
directions are ignored.

WARNING

• Installation or repairs made by unqualified persons can
result in hazards to you and others.

• Air conditioner Shall be installed in accordance with
national wiring regulations.

!

!

!

MFL70500702

Rev.00_101618

Copyright © 2018 LG Electronics Inc. All Rights Reserved.

MFL70500702 2018. 10. 19. 오오 9:37 Page 1

INTRODUCTION

Symbols used in this Manual

This symbol alerts you to the risk of electric shock.

This symbol alerts you to hazards that may cause harm to the air conditioner.

!

This symbol indicates special notes.

!

Features

Air filter

Air outlet

Air deflector

(Vertical louver & Horizontal vane)

Air Intake Vents

Air Outlet Vents

* The feature can be changed according to type of model.

Plasmaster Ionizer

Front grille
Signal receiver
Display

On/Off button

Connecting
Wires

Piping

Drain Hose

Base Plate

INSTALLATION MAP

Installation plate
Sleeve
Bushing-Sleeve

Putty(Gum Type Sealant)

Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.

Vinyl tape (Wide)

• Apply after carrying out a
drainage test.

• To carry out the drainage

Saddle

* The feature can be changed according a type of model.
* Work to the vinyl tape should up from below.

NOTE

!

• You should purchase the installation parts. (lt can be changed according to market)

test, remove the air filters
and pour water into the heat
exchanger.

Gas side piping (Optional Parts)
Liquid side piping (Optional Parts)
Additional drain pipe

Vinyl tape (Narrow)
Drain hose
Connecting cable
(Optional Parts)

Fixing Installation Plate

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 Horizontal
meter.

Installation Plate

Type "A" Screws

Chassis

Hook

Installation Plate

Type "A" Screws

Chassis

Hook

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.

Place a level on raised tab

Unit Outline

C Type : 418 C Type : 418

Ø 65

Installation Plate

C Type

Left rear piping

Place a level on raised tab

Unit Outline

C Type: 494 C Type: 504

Ø 65

Left rear piping

C Type: 134

Measuring Tape

83

Measuring Tape

C Type : 134C Type : 98

Hanger

Ø 65

194152

(Unit : mm)

Ø 65

83

C Type: 150

(Unit : mm)

Right rear piping

Right rear piping

Drill a Hole in the Wall

- Drill the piping hole with a Ø 65 mm hole
core drill. Drill the piping hole at either the
right or the left with the hole slightly slanted
to the outdoor side.

WALL

Indoor

Outdoor

5-7 mm

(3/16"~5/16")

Flaring Work

Main cause for gas leakage is due to defect of
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 1.5 m longer than the pipe

length.

Copper

pipe

90°

Slanted Uneven Rough

3 Pull back the tubing holder.
4 Remove pipe port cover and positioning

the tubing

Indoor unit back side view

Right

* The feature can be changed according to

type of model.

Assembly of chassis cover

1 Insert 4 hooks of the chassis cover into

gap of the chassis certainly.

2 Push the 6 point hook to assemble chassis

cover. Push the chassis cover ①→②.

NOTE

!

To protect the chassis cover bended,
assembly chassis cover correctly.

Tubing holder

Left

Backwards

Good case

- Press on the tubing cover and unfold the
tubing to downward slowly. And then bend
to the left side slowly.

* The feature can be changed according to

type of model.

Bad case

- Following bending case from right to left

directly may cause damage to the tubing.

* The feature can be changed according to

type of model.

NOTE

!

Installation Information. For right piping.
Follow the instruction above.

INSTALLATION PARTS

Screws for fixing panels are attached to decoration panel.
When Indoor unit (18,24 kBtu/h) is connected to the Multi Outdoor unit, use the connector.

INSTALLATION TOOLS

Figure FigureName

Screw driver

Electric drill

Measuring tape, Knife

Hole core drill

Spanner

Torque wrench

Hexagonal wrench

Gas-leak detector

Name

Multi-meter

Ammeter

Thermometer,

Level

Flaring tool set

INSTALLATION

Select the best Location

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

- Select a place where there are no obstacles
around of the unit.

- Make sure that condensation drainage can
be conveniently routed away.

- Do not install near a doorway.

- Ensure that the interval between a wall and
the left (or right) of the unit is more than
100mm. The unit should be installed as high
as possible on the wall, allowing a minimum
of 200 mm from ceiling.

- Use a metal detector to locate studs to
prevent unnecessary damage to the wall.

More than

100

* The feature can be changed according to

type of model.

NOTE

!

The gap between the indoor unit and
ceiling is needed more than 200 mm for
disassemble the air filter.

More than 200

More than

100

(Unit : mm)

Outdoor unit

- 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 space around the back and
sides is more than 300 mm. The space in
front of the unit should be more than 700 mm
of space.

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

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

- Select a place where the warm air and noise
from the air conditioner do not disturb
neighbors.

* The feature can be changed according to

type of model.

Burrs removal

1 Completely remove all burrs from the cut

cross section of pipe/tube.

2 While removing burrs put the end of the

copper tube/pipe in a downward direction
while removing burrs location is also
changed 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 finishing
flare work)

Copper tube

Flare nut

Check

1 Compare the flared work with the figure

2 If a flared section is defective, cut it off

Smooth all round

Even length

all round

<Wing nut type>

<Clutch type>

"A"

Bar

by.

and do flaring work again.

Bar

Copper pipe

Clamp handle

Inside is shiny without scratches

= Improper flaring =

Inclined

damaged

Surface

Handle

Yoke

Cone

Red arrow mark

Cracked Uneven

thickness

Connecting the Piping

1 Pull the cover at the bottom of the indoor

Flaring work

1 Firmly hold copper pipe in a bar with the

dimension shown in below table.

2 Carry out flaring work with the flaring tool.

Pipe diameter

Inch (mm)

Ø1/4 (Ø6.35)

Ø3/8 (Ø9.52)

Ø1/2 (Ø12.7)

Ø5/8 (Ø15.88)

A inch (mm)

Wing nut type Clutch type

0.04~0.07 (1.1~1.8) 0~0.02 (0~0.5)

unit. Pull the cover ①→②.

2 Remove the cover from the indoor unit.

Installation of Indoor Unit

1 Hook the indoor unit onto the upper

portion of the installation plate.( engage
the three hooks at the 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

Installation plate

2

Unlock the tubing holder from the chassis
and mount between the chassis and
installation plate in order to separate the
bottom side of the indoor unit from the wall.

View

Tubing Holder

Slide up the metal
plate cover

Terminal block

Connecting cable

Cable retainer

*

The feature can be changed according to the
type of model.

Piping

1 Insert the connecting cable through the

bottom side of indoor unit and connect the
cable (You can see detail contents in
'Connecting the cables' section)

<Left side piping>

1(L) 2(N) 3(C)

<Left side piping>

Tape

Connecting
cable

Drain hose

<Right side piping>

<Right side piping>

2 Secure the cable onto the control board

with the cable retainer.

3 Tape the tubing pipe, drain hose and the

connection cable. Be sure that the drain
hose is located at the lowest side of the
bundle. Locating at the upper side can
cause overflow from the drain pan through
the inside of the unit.

Drain hose

View

1(L) 2(N) 3(C)

Connecting
cable

Drain hose

Connecting pipe

Slide up the metal
plate cover

Terminal block

Connecting cable

Cable retainer

Tape

Connecting pipe

Outside Diameter Torque

Connecting the installation pipe
and drain hose to the indoor unit.

1 Align the center of the pipes and

sufficiently tighten the flare nut by hand.

* When Indoor unit (6.6 kW) is connected to

the Multi Outdoor unit, use the connector.

2 Tighten the flare nut with a wrench.

3 When needed to extend the drain hose of

indoor unit, assembly the drain pipe as
shown on the drawing.

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 may be no gap.

2 Set the tubing cutting line upward.

Wrap the area which accommodates the
rear piping housing section with vinyl tape.

3 For left rear piping, bundle the piping and

drain hose together by wrapping them
cloth tape over the range within which
they fit into the rear piping housing
section.

* Wrap the piping of the indoor unit that are

visible from the outside with vinyl tape.

mm inch kgf.cm N.m
Ø 6.35 1/4 180~250 17.6~24.5
Ø 9.52 3/8 340~420 33.3~41.2
Ø 12.7 1/2 550~660 53.9~64.7

Ø 15.88 5/8 630~820 61.7~80.4

Vinyl tape(narrow)

Connection pipe

Connecting cable

Cloth tape

Wrap with cloth tape

Indoor unit pipe

Pipe

Gas Pipe

Liquid Pipe

Cutting Line

Cutting Line

Good Case Bad Case

* Tubing cutting line have to be upward.

Use round pressure terminals for connections
to the power terminal block.

1 Mount the tubing holder in the original

position.

2 Ensure that the hooks are properly seated

on the installation plate by moving it left
and right.

3 Press the lower left and right sides of the

unit against the installation plate until the
hooks engage into their slots (clicking
sound).

4 Finish the assembly by screwing the unit

to the installation plate by using two pieces
of type "C" screws. And assemble a
chassis cover.

* The feature can be changed according to

type of model.

Finishing the indoor unit
installation

CAUTION

According to 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 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 cause burn-out of
the wires.)

3 Specification of power source.
4 Confirm that electrical capacity is

sufficient.

5 See 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 Always 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 3 mm in each
active(phase) conductors.

10 Open the terminal cover block before

connecting the indoor side wire.

!

CAUTION

The indoor unit can be dropped from the
wall, the indoor unit is not screwed
correct position on the install plate.

To avoid the gap between the indoor unit
and wall , screw the indoor unit to the
install plate correctly.

!

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 tapes.

- 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 exteri-

or wall using saddle or equivalent.

* The feature can be changed according to

type of model.

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 using saddle or

equivalent.

Air Purging

The air and moisture remaining in the
refrigerant system have undesirable effects as
indicated below.

1 Pressure in the system rises.
2 Operating current rises.
3 Cooling(or heating) efficiency drops.
4 Moisture in the refrigerant circuit may

freeze and block capillary tubing.

5 Water may lead to corrosion of parts in the

refrigeration system.

Therefore, after evacuating the system, take a
leak test for the piping and tubing between
the indoor and outdoor unit.

Air purging with vacuum pump

1 Preparation

- Check that each tube(both liquid and gas
side tubes) between the indoor and out­door units have been properly connected
and all wiring for the test run has been
completed. Remove the service valve
caps from both the gas and the liquid side
on the outdoor unit. Note that both the
liquid and the gas side service valves on
the outdoor unit are kept closed at this
stage.

* The feature can be changed according

a type of model.

- When the desired vacuum is reached, close
the knob of the 3-way valve and stop the
vacuum pump.

- With a service valve wrench, turn the valve
of liquid side counter-clockwise to fully open
the valve

- Turn the valve of gas side counter-clockwise
to fully open the valve

- Loosen the charge hose connected to the
gas side service port slightly to release the
pressure, then remove the hose.

- Replace the flare nut and its bonnet on the
gas side service port and fasten the flare nut
securely with an adjustable wrench. This
process is very important to prevent leakage
from the system

- Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
This completes air purging with a vacuum
pump.

- Replace the pipe cover to the outdoor unit by
one screw. Now the air conditioner is ready
for test run.

Finishing the Job

Required time for evacuation when 30 gal/h

vacuum pump is used

If tubing length is

less than 10 m

(33 ft)

If tubing length is
longer than 10 m

(33 ft)

10 min. or more 15 min. or more

* The feature can be changed according

a type of model.

Connecting the Cables

Indoor 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.)

Insert the connecting cable through the bot­tom side of indoor unit and connect the cable.

(1) Open the Decor
(2) Unscrew the screw of C/Box
(3) Slide up the Metal Plate Cover
(4) Connect the connecting cable
(5) After complete connect the cables, should

assemble the Metal Plate Cover by screw.

* The feature can be changed according a

type of model.

Power
connecting cable

1(L) 2(N) 3(C)

The power connecting cable with indoor and
outdoor unit should be selected according to
the following national wiring regulations.
The supply cords of parts of appliances for
outdoor use shall not be lighter than poly­chloroprene sheathed flexible cord.
(code designation 60245 IEC 57, H05RN-F)

- Connect the wires to the terminals on the
control board individually.

- Secure the cable onto the control board with
the cord clamp.

- If the supply cord is damaged, it must be
replaced by the manufacturer, its service
agent or similarly qualified persons in order
to avoid a hazard.

(mm2)

NOMINAL

CROSS

SECTlONAL

AREA

Grade

9,12,18,24kBtu/h

0.75

NOTE

!

The power cord connected to unit should
be selected according to the following
national wiring regulations. The supply
cords of parts of appliances for outdoor
use shall not be lighter than
polychloroprene sheathed flexible cord.
(code designation 60245 IEC 57, H05RN-F)

CAUTION

- The circuit diagram is a subject to
change without notice.

- The earth wire should be longer than the
common wires.

- When installing, refer to the circuit
diagram on the chassis cover.

- Connect the wires firmly so that they
may not be pulled out easily.

- Connect the wires according to color
codes, referring to the wiring diagram.

!

Checking the Drainage

1 Pour a glass of water on the evaporator.
2 Ensure the water flows through the drain

hose of the indoor unit without any
leakage and goes out the drain exit.

* The feature can be changed according to

type of model.

To check the drainage.

1 The drain hose should point downward for

easy drain flow.

2 Do not make drain piping like the

following.

* The feature can be changed according to

type of model.

Do not raise

Water
leakage

Tip of drain hose
dipped in water

Water
leakage

Ditch

Less than
50 mm gap

Accumulated
drain water

Air

Waving

Water
leakage

Drain piping

Downward slope

2 Leak test

- Connect the manifold valve(with pressure
gauges) and dry nitrogen gas cylinder to
this service port with charge hoses.

- Do a leak test of all joints of the tubing(both
indoor and outdoor) and both gas and liquid
side service valves. Bubbles indicate a leak.
Be sure to wipe off the soap with a clean
cloth.

- After the system is found to be free of leaks,
relieve the nitrogen pressure by loosening
the charge hose connector at the nitrogen
cylinder. When the system pressure is
reduced to normal, disconnect the hose from
the cylinder.

- Remove the caps from the 2-way and 3-way
valves.

- Remove the service-port cap from the 3-way
valve.

- Apply a soap water or a liquid neutral
detergent on the indoor unit connection or
outdoor unit connections by a soft brush to
check for leakage of the connecting points of
the piping.

- If bubbles come out, the pipes have leakage.

- Connect the charge hose end described in
the preceding steps to the vacuum pump to
evacuate the tubing and indoor unit. Confirm
the "Lo" knob of the pressure Gauge is open.
Then, run the vacuum pump. The operation
time for evacuation varies with tubing length
and capacity of the pump. The following
table shows the time required for
evacuation.

Soap water method

Evacuation

NOTE

!

Be sure to use a manifold valve for air
purging. If it is not available, use a stop valve
for this purpose. The knob of the 3-way
valve must always be kept close.

- Pressurize the system to maximum

17.6 kg/cm

2

G (R22 model) or 28.1 kg/cm2G
(R410A model) with dry nitrogen gas and
close the cylinder valve when the gauge
reading reaches 17.6 kg/cm2G (R22 model)
or 28.1 kg/cm

2

G (R410A model). Next step

is leak test with liquid soap.

CAUTION

To avoid nitrogen entering the refrigerant
system in a liquid state, the top of the
cylinder must be higher than its bottom
when you pressurize the system. Usually,
the cylinder is used in a vertical standing
position.

!

WARNING

There is a risk of fire and explosion.

Inert gas (nitrogen) should be used
when you check plumbing leaks, cleaning
or repairs of pipes etc. If you are using
combustible gases including oxygen,
product may have the risk of fires and
explosions.

!

Test Running

- Check that all tubing and wiring are properly
connected.

- Check that the gas and liquid side service
valves are fully open.

1 Remove the battery cover by pulling it

according to the arrow direction.

2 Insert new batteries making sure that the

(+) and (–) of battery are installed correctly.

3 Reattach the cover by pushing it back into

position.

- If you press and hold the On/Off button for
3 – 5 seconds instead of 6 seconds, the unit
will switch to the test operation.

- In the test operation, the unit blows out
strong air for cooling for 18 minutes and then
returns to the factory default settings.

Prepare remote controller

NOTE

!

• Use 2 AAA(1.5 V) batteries. Do not use
rechargeable batteries.

• Remove the batteries from the remote
controller if the system is not used for a
long time.

Test operation

1 Fix the outdoor unit with a bolt and nut

(Ø 10 mm) tightly and horizontally on a
concrete or rigid mount.

2 When installing on the wall, roof or

rooftop, anchor the mounting base
securely with a nail or wire assuming the
influence of wind and earthquake.

3 If the vibration of the unit is transmitted to

the pipe, secure the unit with an anti­vibration rubber.

Operate the unit for 15~20 minutes, then
check the system refrigerant charge:

1 Measure the pressure of the gas side

service valve.

2 Measure the air temperature from inlet and

outlet of air conditioner.

3 Ensure the difference between the inlet

and outlet temperature is more than 8 °C.

4 For reference; the gas side pressure at

optimum condition is shown on table.
(cooling)

The air conditioner is now ready to use.

* The feature can be changed according

a type of model.

Settlement of outdoor unit

Evaluation of the performance

Refrigerant

Outside ambient

TEMP.

The pressure of the

gas side service valve.

R22 35 °C (95 °F)

4~5 kg/cm2G

(56.8~71.0 P.S.I.G.)

R410A 35 °C (95 °F)

8.5~9.5 kg/cm2G

(120~135 P.S.I.G.)

This is performed when the unit is relocated
or the refrigerant circuit is serviced.

Pump Down means collecting all refrigerant
into the outdoor unit without the loss of
refrigerant.

- Connect a low-pressure gauge manifold hose
to the charge port on the gas side service
valve.

- Open the gas side service valve halfway and
purge the air in the manifold hose using the
refrigerant.

- Close the liquid side service valve(all the
way).

- Turn on the unit's operating switch and start
the cooling operation.

- When the low-pressure gauge reading
becomes 1 to 0.5 kg/cm

2

G(14.2 to 7.1
P.S.I.G.), fully close the gas side valve and
then quickly turn off the unit. Now Pump
Down procedure is completed, and all
refrigerant is collected into the outdoor unit.

Pump Down

Pump Down Procedure

NOTE

!

If the actual pressure is higher than shown,
the system is most likely over-charged, and
charge should be removed. If the actual
pressure are lower than shown, the system
is most likely undercharged, and charge
should be added.

NOTE

!

Be sure to perform Pump Down procedure
in the cooling mode.

WARNING

It may cause explosion or injury.
After pump down, power must be turned

off before removing the pipe.
When operating this product without
connecting the pipe, there will be high
pressure insidce the compressor due to
the entry of air, possibly causing
explosion or injury.

!

Manual the decor, air filter Assembly & Disassembly

Disassemble the decor

1 Turn off the power and unplug the power cord.
2 Pull the decor at the bottom of the indoor unit.

Assemble the decor

1

Turn off the power and unplug the power cord.

2 Insert 3 or 4 hooks of the decor into gap of

the indoor unit certainly.

Disassemble the air filter

1

Turn off the power and unplug the power cord.

2

Hold the knob of the air filter, Lift it up slightly.

3

Remove the decor from the indoor unit.

3 Hold the knob of the air filter, lift it up

slightly and remove it from the unit.

3

Push the nooks to assemble the decor.

Assemble the air filter

1

Turn off the power and unplug the power cord.

2 Insert the hooks of the air filter into the

front grille.

3

Push down hooks to assemble the air filter.

4 Check side of the front grille for the air filter

assembled correctly.

NOTE

!

lf the air filter is not assembled correctly, Dust
and other substance come into the indoor unit.
lf look at the indoor unit from higher than it,
can assemble the air filter easily.

CAUTION

The air filter can be broken when it is
bended.

!

Installation guide at the
seaside

Selecting the location
(Outdoor Unit)

If the outdoor unit is to be installed close to
the seaside, then direct exposure to the sea
wind should be avoided.

Install the outdoor unit on the opposite side of
the sea wind direction.

In case of installing the outdoor unit on the
sea side, setup a windbreak to prevent sea
wind.

- 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.

- Keep more than 70 cm of space between
outdoor unit and the windbreak for easy air
flow.

Select a well-drained place.

Sea wind

Sea wind

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

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

* Do not use seawater when you clean up

the heat exchanger.

Sea wind

Windbreak

CAUTION

- Air conditioners should not be installed in
areas where corrosive gases, such as acid
or alkaline gas, are produced.

- 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.

- 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.

!

Precautions about installation in regions with extreme snowfall and cold
temperatures

To ensure the outdoor unit operates properly, certain measures are required in locations where there
is a possibility of heavy snowfall or severe wind chill or cold :

1 Prepare for severe winter wind chills and heavy snowfall, even in areas of the country where these

are unusual phenomena.

2 Position the outdoor unit so that its airflow fans are not buried by direct, heavy snowfall.

If snow piles up and blocks the airflow, the system may malfunction.

3 Remove any snow that has accumulated 100 mm or more on the top of the outdoor unit.
4 Place the outdoor unit on a raised platform at least 500 mm higher than the aver- age annual

snowfall for the area. If the frame width is wider than the outdoor unit, snow may accumulate.

5 Install a snow protection hood.
6 To prevent snow and heavy rain from entering the outdoor unit, install the suction and dis- charge

ducts facing away from direct winds.

7 Additionally, the following conditions should be taken into consideration when the unit operates in

defrost mode:

- If the outdoor unit is installed in a highly humid environment (near an ocean, lake, etc.), en- sure
that the site is well-ventilated and has a lot of natural light. (Example: Install on a rooftop.)

TIPS FOR SAVING ENERGY

Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:

• Do not cool excessively indoors. This may be harmful for your health and may consume more electricity.

• Block sunlight with blinds or curtains while you are operating the air conditioner.

• Keep doors or windows closed tightly while you are operating the air conditioner.

• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.

• Speed up the fan to cool or warm indoor air quickly, in a short period of time.

• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air conditioner is used
for many hours.

• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the air flow or
weaken the cooling / dehumidifying functions.

For your records

Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:

Model number :

Serial number :

You can find them on a label on the side of each unit.

Dealer’s name :

Date of purchase :

- Memo -

98 10 11

1312 14 15

MFL70500702 2018. 10. 19. 오오 9:37 Page 2

Indoor unit tubing Flare nut Pipes

Spanner
(fixed)

Flare nut

Torque wrench

Indoor unit tubing

Drain pipe

Indoor unit drain hose

Vinyl tape(narrow)

Adhesive

Connection
pipe

Pipe

Insulation material

Wrap with cloth tape

Over

5 mm

Round pressure

terminal

Power wire

Type 'C' screw

Saddle

Pipe

Vinyl tape(narrow)

Wrap with
vinyl tape(wide)

Drain hose

Seal a small opening
around the pipings
with gum type sealant.

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

Connecting cable

Pipings

Taping

Drain hose

Seal a small opening
around the pipings
with gum type sealant.

Trap

Trap

Outdoor unit

3-way valve

3-way or

2-way valve

Gas side

Liquid side

Cap

Outdoor unit

Manifold valve

Pressure
gauge

Open Close

Vacuum pump

Drain hose

Cloth tape

45±5 mm

10±3 mm

GN/Y

L

20 mm

Leakage
checking

Connecting area

drain hose

Drain pan

Drain

hose
Leakage
checking

Indoor unit

Outdoor unit

Pressure
gauge

Charge hose

Nitrogen gas
cylinder(in vertical
standing position)

Manifold valve

Bolt

Tubing connection

Decor

Power

Power

connecting cable

connecting cable

Inlet temperature

Discharge air

Discharge
temperature