LG TBNC368GSS3 Owner's manual

P/No.:MFL68065202

MFL68065202

TYPE : CEILING CONCEALED DUCT

2 Concealed Duct Air Conditioner

Introduction

Installation of Indoor,

Outdoor Unit

Connecting Pipes to the

Indoor Unit

Connecting Cables

between Indoor Unit and

Outdoor Unit

Air Purging and

Evacuation

External Static Pressure &

air Flow

Checking the Power Cord &

Test Running

Installation Guide at the

Seaside

2 Safety Precautions

8

9

21

Connecting Pipes to the

Outdoor Unit

23

Checking the Drainage

24

28

Group Control

30

41

42

43

TABLE OF CONTENTS

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

Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classied by the

following indications.

Meanings of 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.

Be sure not to do.

Be sure to follow the instruction.

WARNING

Installation

Do not use a defective or

underrated circuit breaker. Use

this appliance on a dedicated

circuit.

t There is risk of re or electric shock.

For electrical work, contact the

dealer, seller, a qualied

electrician, or an Authorized

Service Center.

t Do not disassemble or repair the product.

There is risk of re or electric shock.

Always ground the product.

t There is risk of re or electric shock.

Install the panel and the cover of

control box securely.

t There is risk of re or electric shock.

Always install a dedicated circuit

and breaker.

t Improper wiring or installation may

cause re or electric shock

Use the correctly rated breaker

or fuse.

t There is risk of re or electric shock.

Safety Precautions

Installation Manual 3

Safety Precautions

Operation

Do not modify or extend the

power cable.

t There is risk of re or electric shock.

Be cautious when unpacking and

installing the product.

t Sharp edges could cause injury. Be

especially careful of the case edges

and the ns on the condenser and

evaporator.

For installation, always contact

the dealer or an Authorized

Service Center.

t There is risk of re, electric shock,

explosion, or injury.

Do not install the product on a

defective installation stand.

t It may cause injury, accident, or

damage to the product.

Be sure the installation area does

not deteriorate with age.

t If the base collapses, the air

conditioner could fall with it,

causing property damage, product

failure, and personal injury.

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.

t Moisture may condense and wet or

damage furniture.

Do not store or use ammable

gas or combustibles near the

product.

t There is risk of re or failure of product.

Take care to ensure that power

cable could not be pulled out

or damaged during operation.

t There is risk of re or

electric shock.

Do not place anything on the

power cable.

t There is risk of re or

electric shock.

Gasolin

4 Concealed Duct Air Conditioner

Safety Precautions

Do not plug or unplug the power

supply plug during operation.

t There is risk of re or

electric shock.

Do not touch(operate) the

product with wet hands.

t There is risk of re or

electrical shock.

Do not place a heater or other

appliances near the power cable.

t There is risk of re and

electric shock.

6 Concealed Duct Air Conditioner

Safety Precautions

Installation

CAUTION

Always check for gas (refrigerant) leakage after

installation or repair of product.

t Low refrigerant levels may cause failure of product.

Install the drain hose to ensure that water is

drained away properly.

t A bad connection may cause water leakage.

Keep level even when installing the product.

t 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.

t It may cause a problem for your neighbors.

90e

Use two or more people to lift and transport the

product.

t Avoid personal injury.

Do not install the product where it will be exposed

to sea wind (salt spray) directly.

t It may cause corrosion on the product. Corrosion,

particularly on the condenser and evaporator ns, could

cause product malfunction or inecient operation.

Do not use the product for special purposes, such as

preserving foods, works of art, etc. It is a consumer air

conditioner, not a precision refrigeration system.

t There is risk of damage or loss

of property.

Do not block the inlet or outlet of air ow.

t It may cause product failure.

Operation

Do not step on or put anything on the product.

(outdoor units)

product.

Do not insert hands or other objects through the

air inlet or outlet while the product is operated.

cause personal injury.

Do not drink the water drained from the product.

 It is not sanitary and could cause serious

health issues.

Use a firm stool or ladder when cleaning or

maintaining the product.

 Be careful and avoid personal injury.

Replace the all batteries in the remote control with

new ones of the same type. Do not mix old and new

batteries or different types of batteries.

 There is risk of fire or explosion

Do not recharge or disassemble the batteries.

Do not dispose of batteries in a fire.

 They may burn or explode.

If the liquid from the batteries gets onto your

skin or clothes, wash it well with clean water. Do

not use the remote if the batteries have leaked.

 The chemicals in batteries could cause burns

or other health hazards.

Safety Precautions

Installation Manual 7

8 Concealed Duct Air Conditioner

Installation Parts Provided

Air outlet vents

Air intake vents

Remote Controller

(Side)

(Rear)

Air intake vents

Air outlet vents

Piping

Drain hose

Connecting wire

Control cover

(Side)

(Rear)

Air outlet

vents

Air intake

vents

Connecting Wire

Drain Hose

Connection Pipe

Control Cover

TEMP

FAN

SPEED

OPER

MODE

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

Installation Manual 9

Installation of Indoor, Outdoor Unit

Indoor unit

Install the air conditioner in the location that

satises the following conditions.

t The place shall easily bear a load exceeding

four times the indoor unit ’s weight.

t The place shall be able to inspect the unit as

the gure.

t The place where the unit shall be leveled.

t The place shall allow easy water

drainage.(Suitable dimension “H” is necessary

to get a slope to drain as gure.)

t The place shall easily connect with the

outdoor unit.

t The place where the unit is not aected by an

electrical noise.

t The place where air circulation in the room will

be good .

t There should not be any heat source or steam

near the unit

Outdoor unit

t If an awning is built over the unit to prevent

direct sunlight or rain exposure, be careful that

heat radiation from the condenser is not

restricted.

t There should not be any animals or plants

which could be aected by hot air discharged.

t Ensure the spaces indicated by arrows from

the wall, ceiling, f

ence or other obstacles.

t Take the weight of the air conditioner into

account and select a place where noise and

vibration are minimum.

t Select a place where the warm air and noise

from the air conditioner do not disturb

neighbors.

H

600600

Top view

(unit: mm)

Front view

Front

Inspection hole

(600X600)

Control box

1000

More than

30 cm

More than

30 cm

More than

70 cm

Sunroof

Fence or

obstacles

Selection of the best location

10 Concealed Duct Air Conditioner

Installation of Indoor, Outdoor Unit

Piping length and the elevation

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

A

Oil trap

Outdoor unit

Indoor unit

B

CAUTION:

should be added (15-7.5) x 110 g = 825 g

is on the basis of reliability.

Gas Liquid Standard Max. Standard Max

.

30 kBtu/h 15.88(5/8") 6.35(1/4") 7.5 50 5 30 50

36 kBtu/h(1Ø,

C/O

)

15.88(5/8") 9.52(3/8") 7.5 50 5 30 15

36 kBtu/h(3Ø)

15.88(5/8") 6.35(1/4") 7.5 50 5 30 40

19.05(3/4") 9.52(3/8") 7.5 50 5 30 50

19.05(3/4") 9.52(3/8") 7.5 50 5 30 65

60 k

Btu/h 19.05(3/4") 12.7(1/2") 7.5 50 5 30

Capacity

Pipe Size

Length A(m) Elevation B(m)

*Additional

(Diameter:Ø)

refrigerant(g/m)

18 kBtu/h 15.88(5/8") 6.35(1/4") 7.5 50 5 30 25

24 kBtu/h 15.88(5/8") 6.35(1/4") 7.5 50 5 30 25

42 kBtu/h(C/O)

19.05(3/4") 9.52(3/8") 7.5 50 5 30 45

48 kBtu/h(C/O)

48 kBtu/h(H/P)

110

36 kBtu/h(1Ø,

H/P

)

15.88(5/8") 6.35(1/4") 7.5 50 5 30 45

Installation Manual 11

Installation of Indoor, Outdoor Unit

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

Drainage hole

A

B

C

1-3 mm

D

(G)

H

I

EF

M10 Nut

M10 SP. washer

M10 washer

X 4

(Local

supply)

X 4

M10 Nut

M10 SP. washer

M10 washer

X 4

(Local

supply)

X 4

CASE 2

POSITION OF CONSOLE BOLT

(Unit:mm)

1282 1230 477 56 590 30 120 1006 294

48k/60k Btu/h

1232 1182 355 45.5 450 30 87 830 186

30k/36k/42k Btu/h

Dimension

Capacity

ABCDEF(G)HI

932

18k24k Btu/h

882 355 45.5 450 30 87 750 163

Indoor unit installation

Installation of Indoor, Outdoor Unit

• 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

12 Concealed Duct Air Conditioner

Installation of Indoor, Outdoor Unit

Ceiling

1~3 mm

Drainage hole

U-Trap

B

C

A

70 mm

B

2C

C

2 x SP

SP = External Pressure

(mmAq)

Ex) External Pressure

= 10 mmAq

A

70 mm

B

40 mm

C

20 mm

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

inclination (1/50 to 1/100).

Prevent any upward flow or reverse flow in

any part.

shall always be provided for the drain pipe.

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.

installation.

CORRECT

INCORRECT

allowed

CAUTION

Installation Manual 13

14 Concealed Duct Air Conditioner

Installation of Indoor, Outdoor Unit

Drill the piping hole with 70 mm dia, hole core

drill.

Piping hole should be slightly slant to the

outdoor side.

5~7 mm

Indoor Outdoor

WALL

INSULATION, OTHERS

Insulate the joint and tubes completely.

All thermal insulation must comply with local requirement.

INDOOR UNIT

REFRIGERANT PIPE

Insulate and tape the gas piping.

CAUTION: Cutting line of

insulation must look upper

direction. Thickness of

insulation is 7 mm or over.

Recommended Insulation

material

Material: FOAM PE

Thickness : 10 mm

Density : less than 0.032±0.005(g/cm

2

)

Thermal conductivity : less than

0.03(kcal/m.hr. °C)

NOTICE

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?

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)

Make sure insulate and tape gas and liquid side piping entirely.

Power cable

Thermal insulator

Gas pipe

Liquid pipe

Tape

Filter Drier installation on the connecting pipe is not recommended.It can lead to capacity decreasing.

FILTER DRIER

1. Please fix tightly using provided screw after placing remote controller setup board

on the place where you like to setup.

- Please set it up not to bend because poor setup could take place if setup board bends.

Please set up remote controller board fit to the reclamation box if there is a reclamation box.

2. Can set up Wired remote controller cable into three directions.

- Setup direction: the surface of wall reclamation, upper, right

- If setting up remote controller cable into upper and right side, please set up after removing remote controller

cable guide groove.

❈

Remove guide groove with long nose.

①

Reclamation to the surface of the wall

②

Upper part guide groove

③

Right part guide groove

Installation instruction

Installation Manual 15

Installation of Indoor, Outdoor Unit

Wall

Side

Wall

Side

Wall

Side

Wall

Side

3. Please fix remote controller upper part into the

backplate attached to the surface of the wall, as

the picture below, and then, connect with

backplate by pressing lower part.

- Please make sure to leave no gaps on the top, bottom, left or right

sides between the remote controller and backplate.

- Before assembly with the backplate, arrange the Cable not to

interfere with circuit parts.

Remove remote controller by inserting a

screwdriver into the lower separating holes and

twisting to release the controller from backplate.

- There are two separating holes. Please individually separate one

at a time.

- Please be careful not to damage the inside

components when separating.

4. Please refer to the following directions when connecting the indoor unit and the

wired remote controller together.

1) Please connect the cables as shown in the figure below when connecting the plug type cable from the

indoor unit’s C/BOX and the housing type of the extension cable.

2) When connecting Terminal Blocks of the indoor C/BOX and the wired remote controller with the extension

cable, refer to the steps below.

①

Remove the screw on the cable which is fastened to the wired remote controller’s Terminal Block by

loosening with a screw driver.

②

Remove the housing of the provided 32ft extension cable with a cutting nipper and peel it as shown in the

figure below. (when purchasing the extension cable at the site directly, please peel it as shown in the figure

below.)

Please check if the connectors are connected properly.

C/BOX Cable (Plug type)

Extension cable(housing type)

Indoor

Unit side

TEMP

FAN

SPEED

OPER

MODE

• Specification of LG supplied extension cable: AWG#22, 3 core shielded. (Model : PZCWRC1)

Apply enclosed noncombustible conduit(metal raceway) totally or use FT-6 rated cable or above level in

case of local electric & building code that requires plenum (CMP) cable usage.

CAUTION

Signal Yellow

12V Red

GND Black

1.378 inch(35 mm)

±0.197 inch(5 mm)

0.394 inch(10 mm) ± 0.118 inch(3 mm)

16 Concealed Duct Air Conditioner

ENGLISH

5. Please use an extension cable if the distance between the wired remote controller

and the indoor unit is longer than 32ft(10 m).

③

Make sure each wire is securely fastened under each screw terminal and the wires are not in contact with

each other.

④

Please connect the Terminal blocks of indoor unit’s C/BOX and wired remote controller by referring to the

images and contents shown below.

Connect the yellow(signal) part of the wired remote controller’s terminal block and the ‘YL’ part of the indoor

unit’s terminal block.

Connect the red(12V) part of the wired remote controller’s terminal block and the ‘RD’ part of the indoor

unit’s terminal block.

Connect the black(GND) part of the wired remote controller’s terminal block and the ‘BK’ part of the indoor

unit’s terminal block.

In case of loosened screws or insufficient contact between the terminal and the wire, remote controller

may not function properly.

When the power is off on the remote controller, check the connection between the remote controller and

Terminal Block.

Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will

strip the head and make proper tightening impossible.

Over-tightening the terminal screws may break wires and terminal block structure.

• Installation work must be performed in accordance with the national wiring standards and local by

authorized personnel only.

• Installations must comply with the applicable local/national or international standards.

• AWG#22, 3 core shielded is recommended when using the large hole in the center of the back plate.

• AWG#24, 3 core shielded is recommended when using the side or top knock-out of the back plate.

CAUTION

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 164ft(50 m) or longer. (It can cause communication error.)

CAUTION

Remote controller

PCB Terminal

block Remark

Indoor

Terminal

block

Function

YELLOW YL Signal

RED RD 12V

BLACK BK GND

YELLOW RED BLACK

Signal 12V GND

Remote

controller PCB

Indoor unit

side

Installation Manual 17

Installation of Indoor, Outdoor Unit

Remote controller installation

Since the room temperature sensor is in the remote controller, the remote controller box

should be installed in a place away from direct sunlight, high humidity and direct supply of

cold air to maintain proper space temperature. Install the remote controller about 5ft(1.5m)

above the floor in an area with good air circulation at an average temperature.

Do not install the remote controller where it can be affected by:

- Drafts, or dead spots behind doors and in corners.

- Hot or cold air from ducts.

- Radiant heat from sun or appliances.

- Concealed pipes and chimneys.

- Uncontrolled areas such as an outside wall behind the remote controller.

- This remote controller is equipped with LCD display. For proper display of the remote

controller LCD's, the remote controller should be installed properly as shown in Fig.1.

(The standard height is 4~5 ft (1.2~1.5 m) from floor level.)

TEMP

FAN

SPEED

OPER

MODE

TEMP

FAN

SPEED

OPER

MODE

TEMP

FAN

SPEED

OPER

MODE

TEMP

FAN

SPEED

OPER

MODE

5feet

(1.5meters)

(Fig. 1)

Direct

Sun ray contact area

no

yes

18 Concealed Duct Air Conditioner

Installation of Indoor, Outdoor Unit

65

cm

Installation Manual 19

20 Concealed Duct Air Conditioner

Installation of Indoor, Outdoor Unit

Outdoor

Indoor

Control terminal board

Control box

Control box cover

(On which the Electric

Wiring Connection is put)

A A

view

Remote

control cord

Connection

cord between

the indoor unit

and the

outdoor unit

Cord clamper

1

Main

power source

Switch box

Circuit Breaker

Main terminal board

Control terminal board

Cord

clamper

Cover control

ELECTRICAL WIRING

Indoor unit

electrical connection between the

indoor and outdoor unit.

(Remove crews

.)

Perform the electrical wiring work according to the

electrical wiring connection.

requirements.

supplying the current required by the air

conditioner.

the power source and the unit. A

disconnection device to adequately

disconnect all supply lines must be fitted.

WIRING CONNECTION

Please check !!

Capacity 1 Phase 3 Phase

30 kBtu/h 30 A -

36 kBtu/h 40 A 25 A

42 kBtu/h - 30 A

48 kBtu/h - 30 A

60 kBtu/h - 30 A

18 kBtu/h 20 A -

24 kBtu/h 25 A -

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