Lg Lmu246hv, Lmu369hv Installation Guide

ENGLISH

P/No: MFL39817319

FLEX MULTI SPLIT INSTALLATION

INSTRUCTIONS

FRANÇAIS ESPAÑOL

2 Multi Air Conditioner

Multi Air Conditioner Installation Manual

TABLE OF CONTENTS

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

Product Introduction .............................................................4

Indoor Unit.........................................................................4

Outdoor Unit......................................................................4

Safety Precautions ................................................................5

Installation of Indoor, Outdoor Unit.....................................8

Select the best location ....................................................8

Seaside Applications and Installation..............................10

Piping length and elevation .............................................11

Installation............................................................................12

Connecting the piping .....................................................12

How To Fix ......................................................................15

Wiring Connection...........................................................16

Conduit connection .........................................................16

Ceiling dimension and hanging bolt location ..................17

How to Fix .......................................................................18

Wiring Connection...........................................................18

Conduit connection .........................................................18

Installation of wired Remote Controller ...........................20

Wired remote controller switch information.....................21

Trial Operation.................................................................22

Celsius/Fahrenheit Switching..........................................23

Setting the Central-Control Address ...............................24

ESP Function ..................................................................25

Ceiling dimension and hanging bolt location ..................26

Wiring Connection...........................................................27

Conduit connection .........................................................27

Installation of Wired Remote Controller(Optional) ..........28

Installation of Decorative Panel ......................................30

Drain Piping.....................................................................32

Flaring Work and Connection of Piping............................35

Flaring work.....................................................................35

Connection of piping - Outdoor .......................................36

Connecting the Cable between Indoor Unit and

Outdoor Unit.........................................................................37

Connect the cable to the Indoor unit...............................37

Connect the cable to the Outdoor unit. ...........................38

Connection method of the connecting cable(Example) ..39

Checking the Drainage, Insulating the Pipe and Special

Piping Applications .............................................................40

Insulating the Pipe and Special Piping Applications .......40

Long Pipe Setting ................................................................41

Air Purging and Evacuation ...............................................42

Leak Checking ................................................................42

Evacuation.......................................................................43

Charging ...............................................................................44

Combination indoor units...................................................45

❏ Level gauge
❏ Screw driver
❏ Electric drill
❏ Hole core drill (ø50mm)

❏ Flaring tool set
❏ Specified torque wrenches

1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(different depending on model No.)

❏ Adjustable wrench

❏ A glass of water
❏ Screw driver

❏ Hexagonal wrench(4mm)
❏ Refrigerant Gas Leak Detector
❏ Vacuum pump
❏ Gauge manifold

❏ Owner's manual
❏ Thermometer
❏ Remote Control Holder

Installation Requirements

Required Tools

Installation Manual 3

ENGLISH

Installation Parts Provided

Installation Parts Provided

[Standard /Artcool Mirror Type]

Type 1 Type 2

Installation plate Installation plate

Type "B" screw Type "B" screw

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

[Cealing Concealed Duct Type]

Name

Quantity

Clamp metal

1 EA

Insulation for

fitting

1 set

Screws for

duct flanges

1 set

Remote control holderRemote control holder

Clamp

8 EA

Conduit
Bracket

1 EA

Shape

[Cealing Cassette Type]

Name

Quantity

Shape

Drain hose

1 EA

Clamp metal

1 EA

for gas pipe

for liquid pipe

Washer for

hanging backet

8 EA

Clamp

8 EA 1 EA

Conduit
Bracket

Conduit Bracket

Screw(M4) 2EA

Conduit Bracket

Screw(M4) 2EA

Insulation for Remote

fitting

1 SET 1 EA

for gas pipe

for liquid pipe

control holder

Here is a brief introduction of the indoor and outdoor units. Please see the information specific to
your indoor unit type.

Product Introduction

4 Multi Air Conditioner

Product Introduction

more than

70 cm

(27.6 inch)

more than

60 cm

(23.6 inch)

more than

30 cm

(1

1.8 inch)

more than

30 cm

(11.8 inch)

Air Outlet

Air Intake

(side, rear)

Connection pipe
Drain hose

Connecting wire

Control cover

more than 30 cm

(11.8 inch)

Signal receiver

Front panel

Air discharge

ON/OFF button

Power cord

Plasma filter

Air inlet
Air filter

Air inlet

Plasma filter (Optional)

Air filter

Air outlet

Front grille
ON/OFF button

Signal

receiver

Grille tab

Flap

(Horizontal blade)

Louvers

(Vertical blades)

Cabinet

Air Discharge

Air Inlet

Signal receiver

Front Panel

Air outlet vents

Air Inlet

[Standard Type]

[Cealing Concealed Duct Type]

[Artcool Mirror Type]

[Ceiling Cassette Type]

Air outlet vents

Base plate

Connection pipe
Drain hose

Connecting wire

Air intake vents

Indoor Unit

Outdoor Unit

Installation Manual 5

ENGLISH

Safety Precautions

To prevent the injury of the user or other people and property damage, the following instructions
must be followed.

■ Be sure to read before installing the air conditioner.

■ Be sure to observe the cautions specified here as they include important items related to safety.

■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is

classified by the following indications.

■ The meanings of the symbols used in this manual are as shown below.

WARNING

CAUTION

This symbol indicates the possibility of death or serious injury.

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

WARNING

■ Installation

Be sure not to do.

Be sure to follow the instruction.

Safety Precautions

Always perform grounding.

• Otherwise, it may cause
electrical shock.

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

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

For installation of the product,
always contact the service
center or a professional
installation agency.

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

Securely attach the electrical
part cover to the indoor unit
and the service panel to the
outdoor unit.

• If the electrical part cover of the
indoor unit and the service
panel of the outdoor unit are not
attached securely, it could result
in a fire or electric shock due to
dust, water, etc.

Always install an air leakage
breaker and a dedicated
switching board.

• No installation may cause a fire
and electrical shock.

Do not keep or use flammable
gases or combustibles near
the air conditioner.

• Otherwise, it may cause a fire
or the failure of product.

Ensure that an installation frame of the
outdoor unit is not damaged due to use for a
long time.

• It may cause injury or an accident.

Do not disassemble or repair the product
randomly.

• It will cause a fire or electrical shock.

6 Multi Air Conditioner

Safety Precautions

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

• Otherwise, it may result in personal injury.

Use caution when unpacking and installing.

• Sharp edges may cause injury.

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

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

Do not use the power cord
near the heating tools.

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

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

• Otherwise, it may electrical
shock and failure.

Do not allow water to run
into electrical parts.

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

Hold the plug by the head
when taking it out.

• It may cause electric shock
and damage.

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

• They are sharp and may
cause injury.

Do not share the outlet with
other appliances.

• It will cause an electric shock
or a fire due to heat
generation.

Do not use the damaged
power cord.

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

Do not modify or extend the
power cord randomly.

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

Take care so that the power
cord may not be pulled
during operation.

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

Unplug the unit if strange
sounds, smell, or smoke
comes from it.

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

Keep the flames away.

• Otherwise, it may cause a fire.

Do not step on the indoor/outdoor unit and
do not put anything on it.

• It may cause an injury through dropping of the
unit or falling down.

Do not place a heavy object on the power
cord.

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

When the product is submerged into water,
always contact the service center.

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

Take care so that children may not step on
the outdoor unit.

• Otherwise, children may be seriously injured
due to falling down.

■ Operation

Installation Manual 7

ENGLISH

Safety Precautions

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.

Keep level parallel in installing the product.

• Otherwise, it may cause vibration or water
leakage.

Avoid excessive cooling and perform
ventilation sometimes.

• Otherwise, it may do harm to your health.

Use a soft cloth to clean. Do not use wax,
thinner, or a strong detergent.

• The appearance of the air conditioner may
deteriorate, change color, or develop surface
flaws.

Do not use an appliance for special purposes
such as preserving animals vegetables,
precision machine, or art articles.

• Otherwise, it may damage your properties.

Do not place obstacles around the flow inlet
or outlet.

• Otherwise, it may cause the failure of
appliance or an accident.

■ Operation

8 Multi Air Conditioner

Installation of Indoor, Outdoor Unit

Installation of Indoor, Outdoor Unit

Read completely, then follow step by step.

Indoor unit

1. Do not have any heat or steam near the unit.

2. Select a place where there are no obstacles
in front of the unit.

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

4. Do not install near a doorway.

5. Ensure the unit is unobstructed, allow proper
space on all sides according to the arrows
and distance measurements in the figures.

6. Use a Metal Detector or Metal Scanner to
locate studs to prevent unnecessary damage
to the wall.

Select the best location

Top view

Front view

600(23 19/32)

600(23 19/32)

7 5/16

Front

1000(39 3/8)

H=13/16 or more

A

B

Capacity(Btu/h class)

AB

9/12k 600(23 5/8) 900(35 15/32)

18k 600(23 5/8) 1100(43 5/16)

Unit:mm(inch)

Ceiling

False ceiling

False ceiling

20(13/16) or more

1500

(59 1/16)

or more

1500(59 1/16) or

more

Above 2500(98 7/16)

3300(129 15/16) or less

1500(59 1/16)or

more

Floor

[Cealing Concealed Duct Type] [Cealing Cassette Type]

More than 200(7 7/8)

More than
2300(90 9/16)

More than

100(3 15/16)

More than

100(3 15/16)

Unit:mm(inch)

[Standard /Artcool Mirror Type]

Outdoor unit

1. If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the condenser is not
restricted.

2. Ensure the unit is unobstructed, allow proper
space on all sides according to the arrows
and distance measurements in the figures.

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

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

5.

Select a place so that the warm air and sound
from the air conditioner does not disturb
neighbors.

Rooftop Installations:

If the outdoor unit is installed on a roof
structure, be sure to level the unit. Ensure the
roof structure and anchoring method are
adequate for the unit location. Consult local
codes regarding rooftop mounting.

Installation of Indoor, Outdoor Unit

Installation Manual 9

ENGLISH

300(11 13/16) or more

300(11 13/16) or more

Unit:mm(inch)

10 Multi Air Conditioner

Seaside Applications and Installation

Installation of Indoor, Outdoor Unit

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.

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 windbreaker/barrier, to lessen the unit's exposure to sea air

3) Select a well-drained place.

• It should be strong enough (like concrete) to obstruct
the wind from the sea.

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

• A minimum of 70cm (27 1/16 inches)

of space between outdoor unit and the windbreak

for easy air flow.

Sea wind Sea wind

Sea wind

Windbreaker/Barrier

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

1. Selecting the location(Outdoor Unit)

Installation Manual 11

ENGLISH

Installation of Indoor, Outdoor Unit

Multi Piping Type

Piping length and elevation

36k 75(246) 25(82) 3(10) 15(49) 7.5(25) 48k

Outdoor Unit

Capacity

(Btu/h class)

Max total length

of all pipes

(A+B)/(A+B+C)/

(A+B+C+D)

Max length of

each pipe
(A/B/C/D)

Min length of

each pipe
(A/B/C/D)

Max Elevation
between each

indoor unit and

outdoor unit (h1)

Max elevation

between indoor

units (h2)

Max.Combination

of Indoor unit

(Btu/h class)

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

9k 9.52(3/8) 6.35(1/4) 7.5(25) 20(0.22)

12k 9.52(3/8) 6.35(1/4) 7.5(25) 20(0.22)

18k 12.7(1/2) 6.35(1/4) 7.5(25) 20(0.22)

Gas Liquid

Standard

Pipe Length

Unit : m(ft)

Additional

Refrigerant

Unit : g/m(oz/ft)

Indoor unit

Capacity

(Btu/h class)

Pipe Diameter

Unit : mm(inch)

Unit : m(ft)

A

B

h2

C

D

h1

12 Multi Air Conditioner

Installation

1. Prepare the indoor unit's piping and drain
hose for installation through the wall.

2. Remove the plastic tubing retainer(see the
illustration on the right) and pull the tubing
and drain hose away from chassis.

3. Route the indoor tubing and the drain hose to
the required piping hole position.

4. Insert the piping, drain hose, and the
connecting cable into the piping hole.

5.

Insert the connecting cable into the indoor unit.

• Don't connect the cable to the indoor unit.

• Make a small loop with the cable for easy
connection later.

6. Tape the drain hose and the connecting
cables.

7. Indoor unit installation

• Hang the indoor unit from the hooks at the
top of the installation plate.

• Insert the spacer etc. between the indoor
unit and the installation plate and separate
the bottom of the indoor unit from the wall.

Connecting
pipe

Connecting cable

Tape

Drain hose

For right rear piping For left rear piping

Installation

Connecting the piping

[Standard /Artcool Mirror Type]

Connecting

cable

Drain pipe

Indoor unit

Spacer

Installation plate

80(33/16)

Installation

Installation Manual 13

ENGLISH

8. Connecting the piping to the indoor unit and
drain hose to drain pipe.

1) Align the center of the pipes and

sufficiently tighten the flare nut by hand.

2) Tighten the flare nut with a wrench.

3) Next, extend the indoor unit's drain hose.

Then attach the drain pipe.

mm inch kgf.m (lbf·ft)
Ø6.35 1/4 1.8~2.5 (13~18)
Ø9.52 3/8 3.4~4.2 (24~30)
Ø12.7 1/2 5.5~6.6 (40~48)

Outside diameter Torque

Installation Information. For left piping. Follow the instruction below.

Good case

• Press on the upper side of clamp and unfold the tubing to slowly downward.

Bad case

• Bending the pipe from right to left may cause damage to the tubing.

Indoor unit tubing Flare nut Pipes

Wrench

Indoor unit tubing

Open-end wrench (fixed)

Flare nut

Connection pipe

Drain pipe

Adhesive

Indoor unit drain hose

Vinyl tape(narrow)

14 Multi Air Conditioner

Installation

9. Wrap the insulation material around the
connecting portion.

1) Overlap the connection pipe insulation and

the indoor unit pipe heat insulation
material. Bind them together with vinyl
tape so that there is no gap.

2) Wrap the area which accommodates the

rear piping housing section with vinyl tape.

3) Bundle the piping and drain hose together

by wrapping them with vinyl tape over the
range within which they fit into the rear
piping housing section.

10. Reroute the pipings and the drain hose

across the back of the chassis.

11. Indoor unit installation

1) Remove the spacer.

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).

Vinyl tape(narrow)

Connection
pipe

Connecting cable

Indoor
unit piping

Pipe

Vinyl tape
(wide)

Wrap with vinyl tape

Drain hose

Vinyl tape(narrow)

Pipe

Wrap with
vinyl tape(wide)

Plastic bands

Insulation material

Piping for
passage through
piping hole

Connecting

Drain hose

Installation

Installation Manual 15

ENGLISH

The wall you select should be strong and
solid enough to prevent vibration

1. Mount the installation plate on the wall with
type "A" screws. If mounting the unit on a
concrete wall, use anchor bolts.

• Mount the installation plate horizontally by

aligning the centerline using a level.

2. Measure the wall and mark the centerline.
It is also important to use caution
concerning the location of the installation
plate-routing of the wiring to power outlets
is through the walls typically. Drilling the
hole through the wall for piping connections
must be done safely.

Chassis

Hook

Installation Plate

Type “A”

Left rear piping Right rear piping

Ø70mm

Ø70mm

110(4 11/32)

110(4 11/32)

90(3 17/32)

70(2 3/4)

Left rear piping Right rear piping

Ø70mm

133mm

Ø70mm

100mm

How To Fix

Chassis

Hook

Installation Plate

Type “A”

<9/12 kBtu/h class>

<18 kBtu/h class>

Installation

16 Multi Air Conditioner

Wiring Connection

1. Connect the wires to the terminals on the
control board individually according to the
outdoor unit connection.

• Ensure that the color of the wires of outdoor
unit and the terminal No. are the same as
those of indoor unit respectively.

2. Attach the Grille onto the cabinet.

• Grasp the lower left and right side of the
Grille and engage four tabs on the top inside
edge of the chassis.

• Press the Grille toward the chassis until it
goes back into place.

Conduit connection

1. Set the connecting cable into the terminal
block of indoor unit, and tighten set screw to
lock the conduit bracket to the indoor unit.

2. Join the conduit and the conduit bracket
together.

Connecting cable

Lock nut

Conduit

Conduit
bracket

Terminal Block in Indoor

1(L1) 2(L2) 3 4

Connected to Outdoor Unit

Connecting cable

Installation

Installation Manual 17

ENGLISH

[Cealing Concealed Duct Type]

Ceiling dimension and hanging bolt location

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(inch)

Dimension

Capacity
Btu/h class

ABCDEFGHI

850 900 383 570 93.5 190 20.6 795 163

9/12k

(33 15/32) (35 15/32) (15 3/32) (22 7/16) (3 11/16) (7 1/2) (13/16) (31 5/16) (6 13/32)

1130 1180 383 570 93.5 190 20.6 1065 163

18k

(44 1/2) (46 1/2) (15 3/32) (22 7/16) (3 11/16) (7 1/2) (13/16) (41 15/16) (6 13/32)

G

1/100

B
A

H

Drainage hole

M10 Nut
M10 SP. washer
M10 washer

X 4
X 4
X 4

CE

I

(Local
supply)

D

F

M10 washer
M10 SP. washer
M10 Nut

X 4
X 4
X 4

(Local
supply)

18 Multi Air Conditioner

Installation

• 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.

How to Fix

CAUTION : Tighten the nut and bolt to prevent unit falling.

Connect the wires to the terminals on the control board individually according to the outdoor unit connection.

• Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively.

Wiring Connection

B1/B2 Series

Conduit connection

1. Remove the busing rubber product attached on the indoor unit.

2. Set the connecting cable into the terminal block of indoor unit, and tighten set screw to lock the
conduit bracket to the indoor unit.

3. Join the conduit and the conduit bracket together.

Lock nut

Conduit
mounting
plate

Conduit

Old building New building

1 Set anchor

2 Plate washer
3 Spring washer

4 Nut

5 Suspension
bolts

Terminal Block of Indoor Unit

1(L1) 2(L2) 3

Connected to outdooor unit

Installation

Installation Manual 19

ENGLISH

CAUTION

Front of view

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 19mm(1/32 inch).

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

INSULATION, OTHERS

Insulate the joint and tubes completely.

All thermal insulation must comply with local requirement.

INDOOR UNIT

■ After all workings are finished, check the working and operation.

• Air distribution ............... Is the air circulation good?

• Drain ............................. Is the drainage smoothly and no sweating?

• Gas leakage ................. Is the piping connection correctly?

• Wiring ........................... Is the wiring connection correctly?

• Lock-bolt ....................... Is the lock-bolt of compressor loosened?

• Insulation....................... Is the unit fully insulated?

• Ground .......................... Is the unit safely grounded?

THERMAL INSULATION

TEST AND CHECK

Ceiling

Drainage hole

Drain Pump use

Refrigerant pipe and thermal

insulator(Local supply)

Hose clip for thermal insulator

Thermal insulator for refrigerant pipe

(Local supply)

(Local supply)

Union for gas pipe

Union for liquid pipe

Thermal insulator for refrigerant pipe
(Local supply)

Hose clip for thermal insulator(Local supply)

Make sure that there is no clearance here.

Thermal insulator for
piping(Local supply)

Overlap with thermal
insulator for piping.

Felt

Rubber

Insulation

No clearance

Cabinet

20 Multi Air Conditioner

Installation

Installation of wired Remote Controller

1

Put the installation paper on the place and determine
the position and height of the fixing screws of the wired
remote controller.

• Refer to the printed side of the installation paper.

2

Plug the connecting cable into the indoor unit.

• The product is being shipped with the cable
connected only to the remote controller.
Fix the connecting cable with the cable rack.

3

Remove the installation paper before installing the
remote controller so that it can fit at the right place.

* Do not embed the remote controller into the wall.

(It may cause the breakdown of the
temperature sensor.)

* If you want to install a number of remote

controller at the same place in a vertical line,
install them at regular intervals of 20mm(1/32 inch).
(It may cause the breakdown of the temperature sensor.)

* Do not install the cable with a distance of 50m(164ft) or longer.

(This can cause communication error.)

* When installing the cable, check whether the connector between the remote controller and the

product is installed properly. The connector will not be connected when installed in opposite
sides.

❏ Supply the power after connecting wired remote controller.

When you need to change wired remote controller, switch off the main power and change it.
If the wired remote controller is changed before switching off the main power, the option function
of the indoor unit can't be used. (option function like "slo" fan speed selection)

The position of the fixing screws

Side of

remote Controller

Side of

Indoor Unit

Main frame

Fixing the

remote controller

Main

indoor unit

CN-M CN-ZONEC

J15

C01K

IC01A

CN-DISP

LO1K

J14

CN-REMO

Red Yellow Brown

C07D

LO1D

LO2K

20mm(1/32 inch)

Installation

Installation Manual 21

ENGLISH

Wired remote controller switch information

Group control switch

1. For individual control/Master use

2. For group control/Slave use

Ceiling height selection switch

1. Low ceiling

2. Standard ceiling

3. High ceiling

Product selection switch

1. Cooling Only product

2. Heat Pump product

Indoor temperature sensor selection
switch

1. Use the temperature sensor on the remote
controller.

2. Use the temperature sensor on the product.

3. Use the sensors on the product and remote
controller.

• When changing the product selection switch and group control switch, the power must be
reconnected to reflect the changes.

• The central control could operate inappropriately depends on indoor unit type, when the remote
controller is set as slave.

Group Control

Ceiling Height/Default E.S.P

3
2
1

S/W 1

Select Product

Room Temp. Sensing

SWGR

2
1

SWHI

SWPD

2
1

SWTH

321

22 Multi Air Conditioner

Installation

Trial Operation

The trial operation is to check the installation status of the product. The temperature will not be
controlled during trial operation. Instead the product will operate in several modes such as cooling,
strong wind, comp-on.

1

If you want to set the trial operation mode, press
the mode button and the Fan speed button same
time for three seconds.

2

Then the product will begin the trial operation and
the display will be like as shown on left side
picture.

3

If you want to cancel the trial operation mode, just
press the On/Off button.

4

The trail operation will be shut down
automatically after 18 minutes and system will go
to the standby mode.

■ Necessary functions before using

PQRCUCS0C

Defrost Preheat

MODE

TEMP

FAN

SPEED

TEMP

Out door

Room Temp

Total on

Central Run

Installation Manual 23

ENGLISH

Installation

Celsius/Fahrenheit Switching

1

If you want to change the temperature unit as
the Celsius or Fahrenheit, press the
Temperature control button(▼) and the Fan
speed button same time for three seconds to
enter the setting Mode.

2

Press the temperature control button to change
the unit.
Ex) Setting unit as Fahrenheit.

3

After setting, press the Temperature control
button(▼) and the Fan speed button same time
for three seconds to exit the setting Mode.
The system will automatically release without
input after 30 seconds.

PQRCUCS0C

Defrost Preheat Out door

Room Temp

Total on

Central Run

MODE

TEMP

FAN

SPEED

TEMP

Defrost Preheat

Out door

Room Temp

Central Run

Total on

Defrost Preheat

Out door

Room Temp

Central Run

Total on

<Setting as Celsius> <Setting as Fahrenheit>

Defrost Preheat Out door

Room Temp

Total on

Central Run

24 Multi Air Conditioner

Installation

Setting the Central-Control Address

Note : The remote controller displays 'HL' if central controller has locked the remote controller .

1

If you want to set the address on the display
panel, press both temperature control buttons
(▲/▼) same time for three seconds.

2

Press the temperature-increasing button to change
the group number. Press the temperature-decreasing
button to change the indoor unit number.
e.g. As shown on the left side panel, it displays 23.

Group No. : 2
Indoor Unit No. : 3

3

Set the address by pressing both temperature
control buttons again(s/t) at the same time for
three seconds.

• If you connect the indoor unit to the central controller, you should set the network
address of the indoor unit so that the central controller could recognize it.

• The center-control address is composed of the group number and the indoor-unit
number.

Please set the address while using the central controller.

You don't need to set address if you don't use central controller.

PQRCUCS0C

Defrost Preheat

Out door

Room Temp

Total on

Central Run

MODE

TEMP

FAN

SPEED

TEMP

Group No.

Indoor Unit No.

MODE

TEMP

FAN

SPEED

TEMP

Installation

Installation Manual 25

ENGLISH

ESP Function

1

Press the mode button and the temperature
increasing button(▲) same time for three
seconds.

2

Set the volume of each fan speed(Low, Medium, Hi)
by using the temperature control button. Press the
fan speed button to select the fan speed.
The value of E.S.P can be adjusted from 1 to 255.

3

If you press the On/Off button while setting the ESP
function, it will be canceled. (The picture on the left
side is the example of setting the Hi wind to ESP

10.)

4

Press the mode button and the temperature
increasing button (▲) same time for three
seconds. Then the ESP setting will be activated
after the temperature display flashes three times.

E.S.P function is setting the volume of each fan speed. It is for the convenience of installation. It is
recommended that you should not use this function while using the remote controller.

EX)

❈ The E.S.P value is set at the proper value at the

factory. So it is highly recommended that you should
not change the E.S.P value at your discretion.

PQRCUCS0C

Defrost Preheat

Out door

Room Temp

Total on

Central Run

MODE

TEMP

FAN

SPEED

TEMP

Lo

Med

Static pressure(mmAq)

Model name

AMNW09GB1A0

[LMDN095HV]

AMNW12GB1A0

[LMDN125HV]

AMNW18GB2A0

[LMDN185HV]

200

Setting the Low wind to 210 Setting the Medium wind to 175

100

01234

Step(H/M/L)

8.5 CMM(300cfm) 75 84 94 104 114

7.5 CMM(265cfm) 69 77 88 99 110

6.5 CMM(230cfm) 62 71 83 95 106

9.5 CMM(336cfm) 82 90 99 109 118

8.5 CMM(300cfm) 75 84 94 104 114

7.5 CMM(265cfm) 69 77 88 99 110
15 CMM(530cfm) 90 97 105 114 122

13.5 CMM(477cfm) 82 90 99 109 119

11.5 CMM(406cfm) 75 84 93 103 114

Setting value

26 Multi Air Conditioner

Installation

[Cealing Cassette Type]

Ceiling dimension and hanging bolt location

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

• Avoid the following installation location.

1. Such places as restaurants and kitchen where considerable amount of oil steam and flour is generated.
These may cause heat exchange efficiency reduction, or water drops, drain pump mal-function.
In these cases, take the following actions;

• Make sure that ventilation fan is enough to cover all noxious gases from this place.

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

2. Avoid installng air conditioner in such places where
cooking oil or iron powder is generated.

3. Avoid places where inflammable gas is generated.

4. Avoid place where noxious gas is
generated.

5. Avoid places near high frequency
generators.

CAUTION :

• This air-conditioner uses a drain pump.

• Install the unit horizontally using a level gauge.

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

• 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.

Ceiling

Ceiling board

Level gauge

585~660(23 1/16~26) (Ceiling Opening)

517(20 3/8)

570(22 15/32)

Unit Size

523(20 19/32)

570(22 15/32)
Unit Size

319(12 9/16)

461(18 5/32)

517(20 3/8)

585~660(23 1/16~26) (Ceiling Opening)

Unit: mm(inch)

NOTICE

Air conditioner

Take enough
distance

Cooking table

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

Installation

Installation Manual 27

ENGLISH

• The following parts are local purchasing.

① Hanging Bolt - W 3/8 or M10

② Nut - W 3/8 or M10

③ Spring Washer - M10

④ Plate Washer - M10

CAUTION : Tighten the nut and bolt to
prevent unit from falling off.

Wiring Connection

How to Fix

Connecting Cable

Conduit

Screw

Conduit bracket

Conduit connection

• Remove the busing rubber product attached on the indoor unit.

• Join the conduit and the conduit bracket together using nut.

• Set the connecting cable into the terminal block of indoor unit, and tighten set screw to lock the
conduit bracket to the indoor unit.

• Open the control box cover and connect the remote control cord and indoor power wires.

Ceiling

Hanging bolt

(W3/8 or M10)

Nut

(W3/8 or M10)
Spring washer

(M10)

Keep the length of the bolt

from the bracket to 40mm(1-1/2 inch)

Flat washer for M10

(accessory)

Flat washer for M10

(accessory)
Nut
(W3/8 or M10)

Ceiling board

Air Conditioner body

Keep the length of 15~18mm(5/8~3/4 inch)
between the air conditioner bottom surface
and the ceiling surface

Set screw of

Paper model
for installation

paper model (4 pieces)

Open the ceiling board
along the outer edge of the
paper model

150mm

(5-7/8 inch)

Ceiling board

TQ/TR series

Terminal Block of Indoor Unit

1(L1) 2(L2) 3 4 5

TO AIR
FRESH

Connected to outdoor unit

KIT

OPTION

28 Multi Air Conditioner

Installation

Installation of Wired Remote Controller(Optional)

1. Connect the wired remote controller cable
to the wired remote controller installation
board as shown in the right picture.

2. After fixing the cable to the guide slot,
attach the wired remote controller
installation board at the desired location.

• Before fixing the wired remote controller cable

to the guide slot, remove any clogged part of
the case in the direction to install before the
installation.

3. After locating the wired remote
controller installation board at the
desired location, screw the unit firmly.
(When there is a buried box, install the
wired remote controller board to fit the

buried box.)

• Use the screw provided.

4. After fixing the top part of the wired
remote controller to the installation
board as shown in beside picture, press
the bottom part to assemble the
controller to itʼs board.

When disassemble the wired remote controller
from the installation board, use the driver as
shown in the right picture and insert it into the
hole with the arrow. And when you pull the driver
in the front direction, the wired remote controller
will be separated.

12V Red wire

SIG Yellow wire

GND Black wire

❊ The wired remote controller cable is connected as factory default.

installation board>

12V SIG GND

<Front side of

Top

Bottom

Red
Yellow
Black

installation board>

Fixate the remote
controller cable
to the guide slot.

Use the screws
for fixate the unit
firmly on the wall.

Installation board

Wall

Side

Remote Controller
Cable

<Rear side of

Wall
Side

Guide slot

Wall
Side

Wall

Side

Wall

Side

Installation

Installation Manual 29

ENGLISH

5. Use the connecting cable to connect the indoor unit and the wired remote
controller.

6. When the distance between the wired remote controller and the indoor unit is
10m and above, use the extension cable.

When installing the wired remote controller, do not bury it in the wall.
(It can cause damage in the temperature sensor.)
Do not install the cable to be 50m or above.
(It can cause communication error.)

• When installing the extension cable, check the connecting direction of the connector of the remote
controller side and the product side for correct installation.

• If you install the extension cable in the opposite direction, the connector will not be connected.

• Specification of extension cable: 2547 1007 22# 2 core 3 shield 5 or above.

CAUTION

Check whether the connector
is connected correctly.

Indoor
unit side

Connecting cable

30 Multi Air Conditioner

Installation

Installation of Decorative Panel

The decorative panel has its installation direction.
Before installing the decorative panel, always remove the paper template.

1. Remove the packing and take out air inlet
grille from front panel.

2. Remove the Corner covers of the panel.

3. Fit the panel on the unit by inserting
hooks as shown in picture.

4. Insert two screws on diagonal corners of
panel. Do not tighten the bolts
completely. (The fixing screws are
included in the indoor unit box.)
Check the alignment of panel with the
ceiling. Height can be adjusted using
hanging bolts as shown in picture. Insert
the other two screws and tighten all
screws completely.

Front grille

Coner cover

Hook clip

Hook

Installation

Installation Manual 31

ENGLISH

5. Fit the corner covers.

6. Open two screws of control panel cover.

7. Connect one display connector and two
vane control connectors of front panel to
indoor unit PCB.
The position marking on PCB is as:
Display connector : CN-DISPLAY
Vane control connector: CN-VANE 1,2

8. Close the cover for control box.

9. Install the air inlet grille and Filter on the
panel.

Screw

CN-VANE 1,2

CN-DISPLAY

32 Multi Air Conditioner

Installation

CAUTION:

Install certainly the decorative panel.

Cool air leakage causes sweating.  Water drops fall.

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

HEAT INSULATION

1. Use the heat insulation material for the refrigerant piping which has an excellent heat­resistance [over 120°C(248°F)].

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(73.4°F)],
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 20mm.

• Stick glass wool on all air conditioners that are located in ceiling atmosphere.

Drain Piping

1. The drain hose should point downward for
optimum drainage.

2. Incorrect Installation Examples:

Downward slope

Do not raise

Accumulated
drain water

Tip of drain hose
dipped in water

Air

Kinking

Water
leakage

Water
leakage

Ditch

Less than 50mm
(1 31/32 inch) gap

Water
leakage

[Standard /Artcool Mirror Type]

Indoor unit

Fastening band
(accessory)

Refrigerant piping

Thermal insulator
(accessory)

Installation

Installation Manual 33

ENGLISH

CAUTION : The supplied
flexible drain hose should not
be curved, neither screwed.
The curved or screwed hose
may cause a leakage of water.

[Cealing Concealed Duct/Cealing Cassette Type]

• 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 32mm(1 1/4 inch).

•

Be sure to install heat insulation on the drain piping.

Piping material: Polyvinyl chloride pipe inner
diometes Ø 25mm(1 inch) and pipe fittings

• 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.

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

Heat insulation material: Polyethylene foam
with thickness more than 8mm(5/16 inch).

Drain test

Maintenance
drain port

Upward
routing
not allowed

Pipe clamp

Indoor unit

1/50~1/100

MAX : 700 mm(27 9/16 inch)

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)

1/50~1/100

Flexible drain hoseFlexible drain hoseFlexible drain hose

❈ The figure can be changed according to model.

34 Multi Air Conditioner

Installation

Attention

1. Possible drain-head height is up to
700mm(27 9/16 inch). So, it must be
installed below 700mm(27 9/16 inch).

2. Keep the drain hose downward up to
1/50~1/100 inclination.
Prevent any upward flow or reverse flow in
any part.

3. 5mm(3/16 inch) or thicker formed thermal
insulator is provided for the drain pipe.

4. Upward routing is not allowed.

5. Be sure to check the drain pump for normal
operation and abnormal noise when
electrical wiring is complete.

1/50~1/100

MAX 700mm
(27 9/16 inch)

Elbow

Drain pump

Unit

Drain pipe
(Local supply)

Thermal insulator

(Local supply)

Wall

Drain hose

Flaring Work and Connection of Piping

Installation Manual 35

ENGLISH

Flaring Work and Connection of Piping

Flaring work

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(4.9ft) 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 flaring tool

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.

■ If flare is noted to be defective, cut off

the flared section and do flaring work
again.

mm inch mm inch
Ø6.35 1/4 1.1~1.3 0.04~0.05
Ø9.52 3/8 1.5~1.7 0.06~0.07
Ø12.7 1/2 1.6~1.8 0.06~0.07

Outside diameter A

Copper

tube

Point down

Bar

Copper pipe

Smooth all round

Even length

all round

Slanted Uneven Rough

90

Pipe

Reamer

Flare nut

Copper tube

Bar

"A"

Clamp handle

Inside is shining without scratches.

Inclined

Red arrow mark

= Improper flaring =

Surface

damaged

Cracked Uneven

Handle

Yoke

Cone

thickness

36 Multi Air Conditioner

Flaring Work and Connection of Piping

Align the center of the piping and sufficiently
tighten the flare nut by hand.

Connecting pipe order

1) A~D-UNIT gas side pipe

2) A~D-UNIT liquid side pipe

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

• When tightening the flare nut with torque
wrench ensure the direction for tightening
follows the arrow on the wrench.

Main gas
side valve

Main liquid
side valve

Gas side piping

Liquid
side piping

A-UNIT

B-UNIT

C-UNIT
D-UNIT

Outdoor unit(36 kBtu/h class)

Connection of piping - Outdoor

Outside diameter Torque

mm inch kgf.m(lbf.ft)

Ø6.35 1/4

1.8~2.5 (13~18)

Ø9.52 3/8

3.4~4.2 (24~30)

Ø12.7 1/2

5.5~6.6 (40~48)

(Only Indoor Units
18 kBtu/h class )

Connecting the Cable between Indoor Unit and Outdoor Unit

Installation Manual 37

ENGLISH

Connecting the Cable between Indoor Unit and Outdoor 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.)

The ground wire should be longer than the common wires.
The circuit diagram is not subject to change without notice.
When installing, refer to the electrical diagram behind the front panel of Indoor Unit.
The wiring for the outdoor unit can be found on the inside of the Outdoor Unit control cover.

Connect the cable to the Indoor unit.

RECOMMENDATION:

• The circuit diagram is subject to change without notice.

• Be sure to connect wires according to the wiring diagram.

• Connect the wires firmly, so that they can not be pulled out easily.

• Connect the wires according to color codes by referring to the wiring diagram.

RECOMMENDATION:

Provide a
circuit breaker between power
source and the outdoor unit as
shown below.

RECOMMENDATION:

The power cord connected to the outdoor unit should be
comply with the following specifications: ETL recognized and CSA certified.

GN/YL

Line voltage
(208/230V)

AWG12

GN/YL

AWG18

RECOMMENDATION:

When using the separate wires as the power cord, please

secure the separate wires into the control box panel using tie wraps to hold all
wires together in place.

36 kBtu/h class

The power connecting cable connected to the indoor
and outdoor unit should be comply with the
following specifications: ETL recognized and CSA
certified.

Outdoor Unit

Capacity

(Btu/h class)

Power source

Fuse or breaker

Capacity

36k 1ø,208/230V 25A

Main power source

Air

Conditioner

Circuit Breaker
Use a circuit breaker
or time delay fuse.

38 Multi Air Conditioner

Connecting the Cable between Indoor Unit and Outdoor Unit

Connect the cable to the Outdoor unit.

1. Remove the control cover from the unit by loosening the screw.
Connect the wires to the terminals on the control board individually as the following.

2. Secure the cable onto the control board with the holder (clamper).

3. Re-attach the cover control to the original position using the screws.

:

1. Separately wire the high and low voltage lines.

2. Use heat resistant electrical wiring capable of withstanding temperatures up to 75°C(167°F).

3. Use outdoor and waterproof connection cable NRTL(UL, ETL, CSA...) listed and rated more than
300V for the connection between indoor and outdoor unit. (For example, Type SJO-WA), and this
cable should be enclosed in conduit.

WARNING:

• Be sure to comply with local and national codes while running the wire from the

indoor unit to the outdoor unit(size of wire and wiring method, etc).

• Every wire must be connected firmly.

• No wire should be allowed to touch refrigerant tubing, the compressor or any

moving parts.

C UNIT

D UNIT

1(L1) 2(L2) 3 1(L1) 2(L2) 3

A Unit B Unit

1(L1) 2(L2) 3(B) 3(A) 1(L1) 2(L2) 3(C) 3(D)

POWER SUPPLY A UNIT

B UNIT

Indoor Unit Terminal Block Indoor Unit Terminal Block

1(L1) 2(L2) 3

C Unit

Indoor Unit Terminal Block

1(L1) 2(L2) 3

D Unit

Indoor Unit Terminal Block

L1 L2

36 kBtu/h class

Outdoor unit

Terminal
block

Conduit hole

Power supply
cable

Connecting cable
(to the indoor unit)

Screw

Cover control

NOTICE

Connecting the Cable between Indoor Unit and Outdoor Unit

Installation Manual 39

ENGLISH

(1) Remove the side panel and knockouts of conduit

panel. (for low voltage line)
(2) Pull out connection cable through conduit.
(3) After conduit to the panel, fix nut to the opposite

side of panel.
(4) Pass the connection cabel through the hole.
(5) Properly connect the cable on the terminal block.
(6) Fix the connection cable with cord clamp

provided on the unit not to have strain at the

terminal when the connection cable is pulled

outside up to a 35 pound weight

WARNING: Loose wiring may cause
the terminal to overheat or result in
unit malfunction. A fire hazard may
also exist. Therefore, be sure all
wiring is tightly connected.

When connecting each power wire to the
corresponding terminal, follow instructions "How
to connect wiring to the terminals" and fasten the
wire tightly with the fixing screw of the terminal
plate.

How to connect wiring to the terminals

◼ For strand wiring
(1) Cut the wire end with a wire cutter or wire-

cutting pliers, then strip the insulation to
expose the strand wiring about 10 mm(3/8").

(2) Using a screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using a round terminal fastener or pliers,

securely clamp each stripped wire end with a
round terminal.

(4) Position the round terminal wire, and replace

and tighten the terminal screw using a
screwdriver.

Connection method of the connecting cable(Example)

Power supply cable

Connecting Cable

Strip 10 mm(3/8")

Round
terminal

Connecting cable

Loosening the
terminal block
screw

Fastening the
wire tightly

Strand wire

Terminal
block

Side panel

Cord clamp

Conduit hole

Power supply cable
(1Ø, 208/230V)

Connecting cable
(1Ø, 208/230V)

Taping
(for sealing)

Lock nut
(field supply)

Conduit
(field supply)

Conduit panel

Indoor Unit A
Indoor Unit B

Indoor Unit C
Indoor Unit D

40 Multi Air Conditioner

Checking the Drainage, Insulating the Pipe and Special Piping Applications

Insulating the Pipe and Special Piping Applications

Insulate 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 taped piping along the exterior

wall using saddle or equivalent.

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. Secure the piping onto the wall using a

saddle or equivalent.

Plastic
band

Taping

Drain hose

Pipings

Connecting
cable

Power supply
cord

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

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

Trap

Trap

Checking the Drainage, Insulating the Pipe and Special Piping Applications

Checking the drainage

1. Remove the Air Filter.

2. Check the drainage.

• Spray one or two glasses of water upon the
evaporator.

• Ensure that water flows drain hose of indoor
unit without any leakage.

❈ The figure can be changed according to model.

Long Pipe Setting

Installation Manual 41

ENGLISH

Long Pipe Setting

1

SW01N

234

1. Open the top cover of outdoor unit.

2. Select one of the two selectable modes as follows.

3. Set the Zone as shown in Fig.

4. Close the top cover and check whether the product works normally.

WARNING: Do not open the top cover or Set the pipe length when
operating the product.

42 Multi Air Conditioner

Air Purging and Evacuation

Air Purging and Evacuation

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, the indoor/outdoor unit and connecting tube must be checked for leaks, and vacuumed
to remove incondensible gas and moisture in the system.

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 sides
on the outdoor unit. Check that both the liquid and
the gas side service valves on the outdoor unit
are kept closed at this stage.

Leakage test

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

CAUTION: Be sure to use a

manifold valve for leak testing.
The high side manifold valve must
always be kept closed.

• Pressurize the system to no more than 150

P.S.I.G. with dry nitrogen gas and close the
cylinder valve when the gauge reading
reached 150 P.S.I.G. Next, test for leaks 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.

:

Leakage testing shoud be done
for each indoor unit connection set,
separately.

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

2. 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.

Leak Checking

❈ The figure can be changed according to model.

NOTICE

Outdoor unit

Manifold valve

Pressure
gauge

Indoor unit

Lo Hi

Charge hose

Nitrogen gas
cylinder(in vertical
standing position)

Installation Manual 43

ENGLISH

Air Purging and Evacuation

1. 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 manifold valve is
open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump.

[Each Room] The vacuum pump must be
operated less than 0.8torr of the gage
pressure.

2. When the desired vacuum is reached, close
the "Lo" knob of the manifold valve and stop
the vacuum pump.

Finishing the job

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

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

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

4. 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.

5. Replace the valve caps at both gas and liquid
side service valves and fasten them tight.

This completes air purging with a vacuum
pump.

The air conditioner is now ready for test
running.

: Repeat evacuation procedure for each

indoor unit.

NOTICE

Indoor unit

Outdoor unit

Lo Hi

Manifold valve

Vacuum pump

Pressure
gauge

Open

Close

Evacuation

❈ The figure can be changed according to model.

Important:

If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge
using the charge amount specified on the Unit`s specification label.

Additional charge(oz ) = (Total Installation Piping Length-Standard Total Piping Length) x 0.22

44 Multi Air Conditioner

Charging

Charging

■ If installed total piping length is more than standard total length, additional refrigerant charging is

necessary.
Below standard total piping length, additional refrigerant charging is not required.

36k 75(246) 25(82) 3(10) 20(0.22) 30(98.4)

Outdoor Unit

Capacity (Btu/h

class)

Max total length of all
pipes (A+B)/(A+B+C)/

(A+B+C+D)

Max length of each

pipe (A/B/C/D)

Min length of each

pipe (A/B/C/D)

Additional Refrigerant

Unit : g/m (oz/ft)

Standard Total Piping

Length (No Add`l

refrigerant)

Unit:m(ft)

❈ If the total additional charge value after calculation comes out to be negative, then do not

consider additional charge.

Each branch pipe
a=82ft
b=16ft
c=49ft

Additional Charge
= {(82+16+49)-123} x 0.22 = 5.28 oz

A

a

b

c

9k

9k

9k

Ex) A4UW363FA2

Installation Manual 45

ENGLISH

Combination indoor units

Combination indoor units

:

1. The total capacity(in Btu/h unit) of connected indoor unit models represents the total sum of the figures
expressed in the indoor model name.

2. Combinations in which the total capacity of the connected indoor units exceeds the capacity of the
outdoor unit will reduce the capacity of each indoor unit below the rated capacity during simultaneous
operation. Therefore, if circumstances allows, combine indoor units within the capacity of the outdoor unit

The indoor units connectable to the outdoor unit are shown below

Type

Standard

Type

Artcool

Mirror

Type

Ceiling

Concealed

Duct Type

Ceiling

Cassette

Type

NOTICE

Chassis

Name

AMNW09GDEL1

SE

S5

SE

S8

B1

B2

TR

TQ

[LMN095HV(T)]

AMNW09GDER1
[LMAN095HV(T)]

AMNW09GB1A0

[LMDN095HV]

Indoor Unit Capacity (Btu/h class)

9k 12k 18k 36 k

Model Name

AMNW12GDEL1

[LMN125HV(T)]

AMNW12GDER1
[LMAN125HV(T)]

AMNW12GB1A0

[LMDN125HV]

AMNW12GTRA0

[LMCN125HV]

AMNW18GD5L1

[LMN185HV(T)]

AMNW18GD8R1
[LMAN185HV(T)]

AMNW18GB2A0

[LMDN185HV]

AMNW18GTQA0

[LMCN185HV]

Outdoor Unit Capacity (Btu/h class)

Connectable Combination

O

O

O

O

O

O

O

O

46 Multi Air Conditioner