LG ARNU15GB1G2 INSTALLATION INSTRUCTIONS

INSTALLATION MANUAL

AIR CONDITIONER

•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.

TYPE : Ceiling Concealed Duct - Low Static

www.lg.com

P/NO : MFL42803109

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Ceiling Concealed Duct - Low Static Type Indoor Unit Installation Manual

TABLE OF CONTENTS

Installation Requirements			Required Parts
Safety Precautions	.................3
Introduction.............................	6

Installation

Four type "A" screws

Connecting cable

Selection of the best location

................................................7

Ceiling opening dimension
and hanging bolt location ......	8
Indoor Unit Installation...........	9
Wiring Connection .................	9
Part name and functions.....	10
Checking the Drainage........	11
Installation of Wired
Remote Controller ...............	15

Name and function of wired remote controller(Accessory)...17

Pipes: Gas side Liquid side

(Refer to Product Data)

Insulation materials

Additional drain pipe

Required Tools

Level gauge

Screw driver

Electric drill

Hole core drill

Flaring tool set

Specified torque wrenches (different depending on model No.)

Spanner .......Half union

A glass of water

Screw driver

Hexagonal wrench

Gas-leak detector

Vacuum pump

Gauge manifold

Owner's manual

Thermometer

Dip Switch Setting ...............	18
Group Control Setting..........	19
How to Set E.S.P? ................	24

2 Indoor Unit

Safety Precautions

Safety Precautions

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

νBe sure to read before installing the air conditioner.

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

νIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

This symbol indicates the possibility of death or serious injury.

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

ν Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

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ν Installation

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

•There is risk of fire or electric shock.

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

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

Always ground the product.

•There is risk of fire or electric shock.

Install the panel and the cover of control box securely.

•There is risk of fire or electric shock.

Always install a dedicated circuit and breaker.

•Improper wiring or installation may cause fire or electric shock.

Use the correctly rated breaker or fuse.

•There is risk of fire or electric shock.

Installation Manual 3

Safety Precautions

Do not modify or extend the power cable.

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

•There is risk of fire or electric shock.

•Moisture may condense and wet or damage furniture.

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

For installation, always con-	Do not install the product on	Be sure the installation area
tact the dealer or an	a defective installation stand.	does not deteriorate with age.
Authorized Service Center.

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

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

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

Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and Do not use Flammable gases.

Otherwise, it may cause fire or explosion.

• There is the risk of death, injury, fire or explosion.

ν Operation

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

• There is risk of fire or failure of product.

4 Indoor Unit

				Safety Precautions
ν Installation
Always check for gas (refrig-		Install the drain hose to		Keep level even when
erant) leakage after installa-		ensure that water is drained		installing the product.
tion or repair of product.		away properly.
• Low refrigerant levels may		• A bad connection may cause		• To avoid vibration or water
cause failure of product.		water leakage.		leakage.
Do not install the product		Use two or more people to lift		Do not install the product
where the noise or hot air from		and transport the product.		where it will be exposed to
the outdoor unit could dam-				sea wind (salt spray) directly.
age the neighborhoods.
• It may cause a problem for		• Avoid personal injury.		• It may cause corrosion on the
your neighbors.				product. Corrosion, particularly
				on the condenser and evapora-
				tor fins, could cause product
				malfunction or inefficient opera-
				tion.

PTIf you eat the liquid from the batteries, brush your teeth and see doctor.

Do not use the remote if the batteries have leaked.

• The chemicals in batteries could cause burns or other health hazards.

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Installation Manual 5

Introduction

Introduction

Symbols Used in this Manual

This symbol alerts you to the risk of electric shock.

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

NOTICE This symbol indicates special notes.

Features

Low static Duct type

Air outlet vents

Air filters

Wired Remote Controller

6 Indoor Unit

Installation

Installation

Selection of the best location

Indoor unit

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

•The place shall easily bear a load exceeding four times the indoor unitʼs 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.

	Inspection hole
	(600 x 600)
	Control box
600	600

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

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

Confirm the positional relationship between the unit and suspension bolts.

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

Side view (unit: mm)

H=20 or more

•Suitable dimension "H" is necessary to get a slooe to drain as aiven in the fiaure

			(Length: mm)
				Low static Duct type
	Capacity(Btu/h)	A	B
	7/9/12/15k	600	900
	18/24k	600	1100

A(Min)	B(Min)

Ceiling

Service Space

A

	[Inspection Hole Standard]		B
	Number of	Distance between	Remarks
	Inspection hole	False ceiling & Actual ceiling
	1	More than 100cm	Sufficient space in the ceiling for servicing.
	2	20cm to 100cm	Insufficient space. Difficult for servicing
	Hole size should be	Less than 20cm	Minimum height for motor replacement.
	more than the size of IDU.

Installation Manual 7

Installation

Ceiling dimension and hanging bolt location

Installation of Unit

Install the unit above the ceiling correctly.

CASE 1

POSITION OF SUSPENSION BOLT

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

•Apply a filter Accessory at air return hole.

(Unit:mm)

Dimension
	A	B	C	D	E	F	G	H	I	J
Capacity(Btu/h)
7/9/12/15k BTU/h	850	900	383	575	93	190	21	795	163	820
18/24k BTU/h	1130	1180	383	575	93	190	21	1065	163	1100

B

A

J

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						F
				I

		H
Drainage hole		Drain Pump use

CASE 2

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

POSITION OF CONSOLE BOLT

•A place where the unit will be leveled and that can support the weight of the unit.

•A place where the unit can withstand its vibration.

•A place where service can be easily performed.

M10 Nut	X 4
M10 washer	X 4
M10 washer	X 4
M10 Nut	X 8

8 Indoor Unit

Installation

Indoor Unit Installation

•Select and mark the position for fixing bolts.

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

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

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

•Mount the suspension bolts to the set anchor firmly.

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

Old building		New building

1 Set anchor

2 Plate washer

3 Spring washer

4 Nut

5 Suspension

bolts

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.

B1/B2 Series

Terminal Block Indoor

Terminal Block Indoor

Outdoor unit

Indoor unit

Central controller

Outdoor unit

L(L1)

N(L2)

3

4

SODU

SODU

IDU

IDU

INTERNET

DRY1

DRY2

GND

12V

INDOOR POWER INPUT

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

CAUTION : The Power cord connected to the unit should be selected according to the following specifications.

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Installation Manual 9