LG AMNQ12GL2A0 INSTALLATION MANUAL

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Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring standards
by authorized personnel only.
Please retain this installation manual for future reference after reading it thoroughly.

Ceilling Concealed Duct
Original instruction

INSTALLATION MANUAL

AIR
CONDITIONER

ENGLISH

*MFL67448535*

Rev. : 00(06T18)

Copyright © 2016 - 2018 LG Electronics Inc. All Rights Reserved.

• 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 :

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:

ENGLISH

TIPS FOR SAVING ENERGY

2

TIPS FOR SAVING ENERGY

3

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

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.

• Installation MUST conform with local building codes or, in the absence of local codes, with
the Nation Electrical Code NFPA 70/ANSI C1-1003 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.

• 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.

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.

• 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.

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 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.

• 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 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.

• Keep level parallel in installing the product. - Otherwise, it may cause vibration or water leakage.

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.

!

ENGLISH

IMPORTANT SAFETY INSTRUCTIONS

4

ENGLISH

5

2 TIPS FOR SAVING

ENERGY

3 IMPORTANT SAFETY

INSTRUCTIONS

6 INTRODUCTION

7 INSTALLATION OF

INDOOR

7 Selection of the best location

8 Ceiling dimension and hanging bolt

location

9 Indoor Unit Installation

9 Wiring Connection

10 Part name and functions

11 Indoor Unit Drain Piping

12 Drain test

12 Heat insulation

13 REMOTE CONTROLLER

INSTALLATION

15 Wired remote controller installation

16 OPTIONAL OPERATION

16 Installer Setting -Test Run Mode

17 Installer Setting - Setting Address of

Central Control

18 Installer Setting -Thermistor

19 Installer Setting-Group Setting

20 Installer Setting-Dry Contact Mode

Setting

21 Installer Setting -Celsius / Fahrenheit

24 HOW TO SET E.S.P?

TABLE OF CONTENTS

TABLE OF CONTENTS

Switching

22 Installer Setting -Optional Function

Setting

23 Installer Setting -Remote controller

Mode Lock

24 Installer Setting -E.S.P.

26 Installer Setting -Static Pressure Step

Setting

28 DIP SWITCH SETTING

6

ENGLISH

INTRODUCTION

Air outlet vents

Air filters

Control box

Air intake vents

TEMP

FAN
SPEED

OPER
MODE

Wired Remote Controller

INTRODUCTION

Top view

Side view

Unit: mm(inch)

eiling

B

INSTALLATION OF INDOOR

INSTALLATION OF INDOOR

7

ENGLISH

Selection of the best location

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

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

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

- The place where the unit shall be leveled.

- The place shall easily connect with the out­door unit.

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

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

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

Unit: mm(inch)

600

Inspection hole

(600 x 600)

Air outlet

Control box

600

Capacity (kBtu/h) A B

9 800 800

12 / 18 800 1000

24 800 1200

A(Min)

B(Min)

(Unit: mm)

C

* Suitable dimension "H" is necessary to get a

slope to drain as shown in the figure

Confirm the positional relationship between
the unit and suspension bolts.

- Installation the ceiling opening to clean the
filter or service under the product.

Service Space

A

Air outlet

H=20 or more

8

E

Drainage hole

ENGLISH

INSTALLATION OF INDOOR

Ceiling dimension and hanging
bolt location

Install the unit above the ceiling correctly.

CASE 1

osition of suspension Bolt

P

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

- Apply a filter Accessory at air return hole.

G

C

D

J
A

B

I

F

H

CASE 2

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

osition of console Bolt

P

- 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.

M10 Nut

M10 SP. washer

M10 washer

M10 washer

M10 SP. washer

M10 Nut

X 4

X 4

X 4

X 4

X 4

X 4

(Local
supply)

(Local
supply)

(Unit:mm)

Dimension

Capacity
(kBtu/h)

12/18 933 972 628 700 36 190 20 860 155 900

A B C D E F G H I J

9 733 772 628 700 36 190 20 660 155 700

24 11331172 628 700 36 190 20 1060 155 1100

INSTALLATION OF INDOOR

ENGLISH

9

Wiring Connection

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.

- 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.

1 Set anchor

Old building New building

2 Plate washer

3 Spring washer

4 Nut

5 Suspension
bolts

CAUTION

Tighten the nut and bolt to prevent unit
falling.

!

CAUTION

The Power cord connected to the unit
should be selected according to the fol­lowing specifications. (Cable type CV ap­proved by IEC 60502-1)

!

Terminal Block

Indoor

Terminal Block

Indoor

1(L) 2(N) 3

Outdoor unitIndoor unit

Terminal Block outdoor

1(L) 2(N) 3

20mm

GN/YL

NORMAL
CROSS-SECTIONAL
AREA 2.5mm

2

WARNING

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

!

Indoor Unit Installation

- Select and mark the position for fixing bolts.

- Drill the hole for set anchor on the face of
ceiling.

10

INSTALLATION OF INDOOR

ENGLISH

Caution for gradient of unit and
drain piping

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

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

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

Ceiling

Ceiling

1/100~1/50

Drainage hole

CORRECT

INCORRECT

Drainage hole

• Install declination of the indoor unit is
very important for the drain of the duct
type air conditioner.

• Minimum thickness of the insulation for
the connecting pipe shall be 5 mm.

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

CAUTION

!

Drainage holeMake sure to be closed.

Unit

Drainage pipe
(Local supply)

Thermal insulator

(Local supply)

- Low static duct type in case of suction from
bottom side.

- In case of suction from bottom size, bend
the Panel rear and screw with cabinet case.

Air outlet

Air Filter

Panel Rear

Air outlet

Air Filter

Panel Rear

Air outlet

Air Filter

Panel Rear

Part name and functions

- Low static duct type in case of suction from
back side.