LG LMNH182BTG0 Installation Manual

ENGLISH

LG Multi Type
Air Conditioner

(Ceiling Duct Type)

INSTALLATION MANUAL

LG

IMPORTANT

• Please read this installation manual completely before
installing the product.

• When the power cord is damaged, replacement work shall
be performed by authorized personnel only.

• 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.

website http://www.lgservice.com
e-mail http://lgservice.com/techsup.html

ESPAÑOL

2 Multi Type Air Conditioner

Multi Type Air Conditioner Installation Manual

TABLE OF CONTENTS

Safety Precautions..............3

Introduction .........................6

Installation of Indoor...........7

Connecting Pipes to the

Indoor Unit.........................12

Connecting Pipes to the ..14

Checking the Drainage .....14

Connecting Cables

between Indoor Unit .........15

Group Control....................17

Two Thermistor system ....17

E.S.P.(External Static

Pressure) Setting...............18

How to Set E.S.P? .............19

Installation

Requirements

Required Parts Required Tools

•

Four Type “A” screws

•

Connecting cable

•

Level

•

Screw driver

•

Electric drill

•

Hole core drill (ø70mm)

•

Pipes: Gas side...........

1

/2", 3/8"

Liquid side...........................

1

/4"

•

Insulated drain hose

•

Insulation materials

•

Flaring Tools set

•

Additional Drain hose

(Inner Dia...............25mm)

•

Screw driver

•

Hexagonal Wrench (4mm/5mm)

•

Gas-leak Detector

Safety Precautions

Installation Manual 3

ENGLISH

To prevent injury to 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.

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

This symbol indicates the possibility of death or serious injury.

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

■ Installation

Be sure not to do.

Be sure to follow the instruction.

Safety Precautions

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.

Safety Precautions

■ Operation

4 Multi Type Air Conditioner

Do not modify or extend
the power cable.

• There is risk of fire or electric
shock.

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

• Moisture may condense and
wet or damage furniture.

Be cautious when
unpacking and installing
the product.

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

For installation, always
contact the dealer or an
Authorized Service Center.

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

Do not install the product
on a defective installation
stand.

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

Be sure the installation
area does not deteriorate
with age.

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

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

• There is risk of fire or failure of product.

Gasolin

Installation Manual 5

ENGLISH

Safety Precautions

Always check for gas
(refrigerant) leakage after
installation or repair of
product.

• Low refrigerant levels may
cause failure of product.

Install the drain hose to
ensure that water is
drained away properly.

• A bad connection may cause
water leakage.

Keep level even when
installing the product.

• To avoid vibration or water
leakage.

Do not install the product
where the noise or hot air
from the outdoor unit could
damage the neighborhoods.

• It may cause a problem for
your neighbors.

Use two or more people to
lift and transport the
product.

• Avoid personal injury.

Do not install the product
where it will be exposed to
sea wind (salt spray)
directly.

• It may cause corrosion on the
product. Corrosion, particularly
on the condenser and evaporator
fins, could cause product
malfunction or inefficient
operation.

■ Installation

90˚

6 Multi Type Air Conditioner

Introduction

This symbol alerts you to the risk of electric shock.

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

This symbol indicates special notes.

NOTICE

Introduction

Symbols Used in this Manual

Features

Air filters

Air intake vents

Remote Controller

Air outlet vents

Installation Manual 7

ENGLISH

Installation of Indoor

Installation of Indoor

Selection of the best location

1) Indoor unit

Select 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 allow easy water

drainage.(Suitable dimension “H” is necessary
to get a slope to drain as figure.)

• The place shall easily connect with the
outdoor unit.

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

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

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

H

600600

Top view

(unit: mm)

Front view

Inspection hole

(600X600)

Control box

Indoor unit installation

■ 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.

CASE 1

POSITION OF SUSPENSION BOLT

(Unit:mm)

9/12k 708 678 434 51 537 455 230 172

18k 1058 1028 434 51 537 805 230 172
24k 1258 1228 434 51 537 1075 230 172

Dimension

Capacity

ABCDEFGH

Drainage hole

A
B

CD

1-3 mm

F

H

G

E

8 Multi Type Air Conditioner

• 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.

CAUTION: Tighten the nut and bolt
to prevent unit falling

1 Set anchor

Old building New building

2 Plate washer
3 Spring washer

4 Nut
5 Suspension

bolts

Installation of Indoor

• 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 2

POSITION OF CONSOLE BOLT

M10 Nut
M10 SP. washer
M10 washer

X 4
X 4

(Local
supply)

X 4

M10 Nut

M10 SP. washer

M10 washer

X 4
X 4

(Local
supply)

X 4

Installation Manual 9

ENGLISH

Installation of Indoor

Ceiling

CAUTION

1~3mm

Drainage hole

Drainage hole

U-Trap

B

C

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

(mmAq)

Ex) External Pressure

= 10mmAq
A ≥ 70mm
B ≥ 40mm
C ≥ 20mm

A

Make sure to be closed.

Unit

Drainage pipe
(Local supply)

Thermal insulator

(Local supply)

Drainage hole

CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING

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

Front of view

• 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.

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

Applied U-Trap Dimension

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 5mm.

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

installation.

CORRECT

CORRECT

INCORRECT

INCORRECT

• Upward routing not
allowed

10 Multi Type Air Conditioner

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

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

INSULATION, OTHERS

Insulate the joint and tubes completely.

All thermal insulation must comply with local requirement.

INDOOR UNIT

REFRIGERANT PIPE

• Insulate and tape both the gas pipe and
liquid pipe.

■ 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?

• Service Valve Lock-bolt Is the lock-bolt of Service Valve loosened?

THERMAL INSULATION

TEST AND CHECK

Make sure that there is no clearance here.

Overlap with thermal
insulator for piping.

Thermal insulator for refrigerant pipe
(Local supply)

Thermal insulator for
piping(Local supply)

Hose clip for thermal insulator(Local supply)

Union for liquid pipe

Refrigerant pipe and thermal
insulator(Local supply)

Union for gas pipe

Thermal insulator for refrigerant pipe
(Local supply)

Hose clip for thermal insulator
(Local supply)

Power cable

Liquid pipe

Thermal insulator

Gas pipe

Tape

Installation of Indoor

Indoor Outdoor

WALL

5~7mm

Installation Manual 11

ENGLISH

Installation of Indoor

INSTALLATION OF REMOTE CONTROLLER

Install the remote control box
and cord correctly.

• Although the room temperature sensor is in the indoor unit, the remote control box should
be installed in such places away from direct sunlight and high humidity.

INSTALLATION OF THE REMOTE CONTROLLER

• Select places that is not splashed by
water.

• Select control position after receiving
customer approval.

• The room temperature sensor of the
thermostat for temperature control is built
in the indoor unit.

• This remote controller equipped with
liquid crystal display. If this position is
higher or lower, display is difficult to see.
(The standard height is 1.2~1.5m high)

ROUTING OF THE REMOTE CONTROL CORD

• Keep the remote control cord away from
the refrigerant piping and the drain
piping.

• To protect the remote control cord from
electrical noise, place the cord at least
5cm away from other power cables.
(Audio equipment, Television set, etc)

• If the remote control cord is secured to a
wall, provide a trap at the top of the cord
to prevent water droplets from running.

POINT OF REMOTE CONTROLLER INSTALLATION

DISASSEMBLING THE REMOTE CONTROLLER

ELECTRICAL WIRING TO THE INDOOR UNIT

FIXING OF REMOTE
CONTROL CORD

1. Fix the cord clamps on the wall
by ø3 tapping screws(Local supply).

2. Fix the remote control cord.

PROCEDURE OF INSTALLATION

1. Fix the under plate on the switch box by
screws(Local supply). In this case, fit the under
plate on the wall, and be careful of deformation.

2. Receive the remote control cord in the switch box.

3. Hook the remote control unit on the under plate.

WHEN THE REMOTE CONTROLLER IS
INSTALLED WITH THE CORD BURIED.

PROCEDURE OF INSTALLATION

1. Fix the under plate on the wall by self tapping
screws (accessory).

2. Make a slit (Part A) at the top side of the remote
controller by nipper.

3.Rout the cord as shown in the following figure. In

this case, push the cord into the around of
case(Part B).

4. Hook the remote control unit on the under plate.

WHEN THE REMOTE CONTROLLER IS
INSTALLED WITH THE CORD EXPOSED.

Remote controller

CN REMO

If the length of the cord exceeds 50m, use a wire size greater than 0.5mm

The maximum length of the cord is 100m.

(Main board)

CN REMO

Make sure that wire and terminal
numbers are matched on unit side
and remote controller side.

2

.

Front case

lo

w

e

r p

a

rt

Remote
control

box body

Lever carefully

the box open

using a screw

driver, etc.

T

h

e

Face of wall
Upper notch

Under plate
Remote

control unit
Screw

(Local supply)
Remote

control cord
Lower notch
Switch box

(Local supply)

Remote

control cord

(Part A)

Remote

control unit

Face of wall

Upper notch

Under plate

Tapping screw
(Local supply)

Upper flange

Push hand

(Part B)

Lower notch

Cord

clamp

12 Multi Type Air Conditioner

Connecting Pipes to the Indoor Unit

Connecting Pipes to the Indoor Unit

Preparation of Piping

Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.

1) Cut the pipes and the cable.

■ Use the accessory piping kit or the pipes
purchased locally.

■ Measure the distance between the indoor
and the outdoor unit.

■ Cut the pipes a little longer than
measured distance.

■ Cut the cable 1.5m longer than the pipe
length.

2) Burrs removal

■ Completely remove all burrs from the cut
cross section of pipe/tube.

■ Put the end of the copper tube/pipe to
downward direction as you remove burrs
in order to avoid to let burrs drop in the
tubing.

3) Putting nut on

■ Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube
having completed burr removal.
(Not possible to put them on after flaring
work)

4) Flaring work

■ Carry out flaring work using 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.

Copper

tube

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Flare nut

Copper tube

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Outside Diameter "A"

1/4" 0~0.5
3/8" 0.5~0.8
1/2" 0.5~0.8
5/8" 0.8~1.0
3/4" 1.0~1.3

Installation Manual 13

ENGLISH

Connecting Pipes to the Indoor Unit

6) Pipe bending

Annealed copper pipe with small diameter (ø6.35 or ø9.52) can be easily bent manually. In
this case, secure large R(radius) for the bend section and gradually bend pipe. If annealed
copper pipe is large in diameter (ø15.88 or ø19.05), bend pipe with bender. Use bender
appropriate for the pipe diameter.

7)

Brazing

In refrigerant piping, bending (in particular, acute bending) must be minimized to reduce
piping resistance. Bending is, however, necessary in some places by virtue of the installation
position of devices auxiliary to the packaged air conditioner, or of the building structure,
piping distance or finishing appearance. If a more acute bend is required than that attainable
by pipe bender, perform brazing using ready-made elbow. Aside from this function, brazing
also serves to connect straight pipes, generally using ready-made sockets. While brazing,
protect piping against heat with wet cloth to avoid damaging valve packing or burning
thermal insulator with burner heat. While brazing, blow inert gas (nitrogen gas or carbonic
gas) to prevent formation of oxidation film in copper piping; otherwise, the refrigerant circuit
will clog. The blowing of nitrogen gas (or carbonic gas) through 3-way valves is described in
the following:

8)

Refrigerant piping(Flare piping)

When connecting piping, be sure to keep piping dry(keep piping away from water), clean
(keep piping away from dust) and airtight (avoid refrigerant leakage).
When connecting piping on rainy days or making a through-hole in wall, take due care to
prevent water or plaster from entering piping.

CAUTION: This procedure is
designed to prevent formation of
oxidation film by filling piping with
inert gas. Note that excessive gas
pressure will generate pinholes at
brazed points.
(Nitrogen gas: Supply pressure

0.05~0.1kg/cm2G)
When supplying inert gas, be sure
to open one end of piping.

Water enters Plaster enters