System

Indoor Unit (2 Series)

INSTALLATION MANUAL

Type: Ceiling Suspended Convertable

LG

IMPORTANT

• 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.

IMPORTANT!

Please read this instruction sheet completely before installing the product.

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

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 National Electrical

Code NFPA 70/ANSI C1-1993 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.

CAUTION:

Improper installation, adjustment, alteration, service or maintenance can void the warranty.

The weight of the condensing unit requires caution and proper handling procedures when lifting or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.

Safety Precautions

• Always wear safety eye wear and work gloves when installing equipment.

• Never assume electrical power is disconnected. Check with meter and equipment.

• Keep hands out of fan areas when power is connected to equipment.

• R-410A causes frostbite burns.

• R-410A is toxic when burned.

NOTE TO INSTALLING DEALER

: The Owners Instructions and Warranty are to be given to the owner or prominently displayed near the indoor Furnace/Air Handler Unit.

Special warnings

When wiring:

Electrical shock can cause severe personal injury or death. Only a qualified, experienced electrician should attempt to wire this system.

• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

• Ground the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

When transporting:

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your finger.

When installing...

... in a wall:

Make sure the wall is strong enough to hold the unit's weight.

It may be necessary to construct a strong wood or metal frame to provide added support.

... in a room:

Properly insulate any tubing run inside a room to prevent "sweating" that can cause dripping and water damage to wall and floors.

... in moist or uneven locatinons:

Use a raised concrete pad or concrete blocks provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

... in an area with high winds:

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

... in a snowy area(for Heat Pump Model):

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When connecting refrigerant tubing

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Check carefully for leaks before starting the test run.

When servicing

• Turn the power OFF at the main power box(mains) before opening the unit to check or repair electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced.

2

Indoor Unit

Ceiling Suspended Convertable Type Indoor Unit Installation Manual

TABLE OF CONTENTS

Installation Requirements

Introduction

.............................4

Required Parts Required Tools

Safety Precautions

.................5

Installation

Selection of the best location ...................................8

❏

Installation guide map

❏

Four type "A" screws & plastic anchors

❏

Connecting cable

Preparing Work for

Installation ..............................8

Indoor unit Installation .........10

❏

Pipes: Gas side

Liquid side

(Refer to Product Data)

❏

Insulation materials

❏

Additional drain pipe

❏

Level gauge

❏

Screw driver

❏

Electric drill

❏

Hole core drill

❏

Horizontal meter

❏

Flaring tool set

❏

Specified torque wrenches

(different depending on model No.)

❏

Spanner .......Half union

Preparation of Piping...........11

Checking the Drainage........13

Wiring Connection ...............13

Side Cover Assembly ..........15

Installation of Wired

Remote Controller ...............16

❏

Hexagonal wrench

❏

Gas-leak detector

❏

Vacuum pump

❏

Gauge manifold

Optional Operation of

Wired Remote Controller ....18

Dip Switch Setting ...............19

Group Control Setting .........20

❏

❏

Owner's manual

Thermometer

Installation Manual

3

Installation Parts

Introduction

Symbols used in this Manual

This symbol alerts you to the risk of electric shock.

NOTICE

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

This symbol indicates special notes.

Features

Air Discharge

Signal Receptor

Right Side Cover

Air Filter

Left Side Cover

Inlet Grill

Drain hose

4

Indoor Unit

Safety Precautions

Safety Precautions

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.

This symbol indicates the possibility of death or serious injury.

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

■

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

Be sure not to do.

Be sure to follow the instruction.

■

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.

Always install a dedicated circuit and breaker.

• There is risk of fire or electric shock.

• 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

5

Safety Precautions

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.

■

Operation

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

• There is risk of fire or failure of product.

Gasolin

6

Indoor Unit

Safety Precautions

■

Installation

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

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

Keep level even when installing the product.

• Low refrigerant levels may cause failure of product.

• A bad connection may cause water leakage.

• To avoid vibration or water leakage.

90˚

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.

If 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.

Installation Manual

7

Installation

Installation

Read completely, then follow step by step.

Select the best Location

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 that the interval between a wall and the left (or right) of the unit is more than 70cm.

6. Use a stud finder to locate studs to prevent unnecessary damage to the wall.

More than

700mm(27-9/16 inch)

More than

700mm(27-9/16 inch)

More than

300mm(11-13/16 inch)

:

In case that the unit is installed near the sea, the installation parts may be corroded by salt. The installation parts (and the unit) should be taken appropriate anti-corrosion measures.

Preparing Work for Installation

Open side cover

1. Remove two screws from side-cover as shown in fig.

2. Unlock side-cover from side panel by slightly pulling the edge of side cover.

3. Tap the side-cover with your palm on the backside.(Inlet grill side.)

4. Hold the side-cover with other hand while tapping to prevent it to fall down.

5. The Drain hole is on the left side of the unit and side cover opening is common for drain pipe, connecting pipe and wiring diagram.

6. Remove the rubber stopple in the desired drain direction.

7. Knock out the pipe hole from the left side-cover with the help or nipper/plier.

8. Knock hole on right side-cover only if right side is selected for water drain.

2

Edge part

1

8

Indoor Unit

MOUNTING THE ANCHOR NUT AND

BOLT

• Prepare 4 suspension bolts. (Each bolts length should be same.)

• Measure and mark the position for the

Suspension bolts and the piping hole.

• Drill the hole for anchor nut on the ceiling.

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

• Mount the suspension bolts to the anchor-nuts firmly.

• Secure the hangers onto the Suspension bolts

(adjust level roughly.) using nuts, washers and spring washers.

• Adjust a level with a level gauge on the direction of left-right, back-forth by adjusting suspension bolts.

• Adjust a level on the direction of top-bottom by adjusting supension bolts. Then the unit will be declined to the bottomside so as to drain well.

Model

VJ

DIM.

A

855(33-11/16)

Installation

Unit: mm(inch)

B

320(12-5/8)

Ceiling

Anchor nut

Nut

Suspension bolts

Washer

A B

Suspension bolt

Suspension bolts

Spring washer

Hangen

Max.

12mm

Nut

Washer

: Tighten the nut and bolt to prevent unit falling.

DRILL A HOLE IN THE WALL.

• Drill the piping hole with a ø70mm hole core drill.

Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.

Hanging bolt

(W3/8 or M10)

Nut

(W3/8 or M10)

Spring washer

(M10)

Flat washer for M10

(accessory)

Flat washer for M10

(accessory)

Nut

(W3/8 or M10)

Indoor

WALL

Outdoor

Installation Manual

9

Installation

Indoor unit installation

Hang the Indoor unit on suspension bolt as per following guidelines:

1. Lift the indoor unit to sufficient height.

2. Insert the suspended part of four suspension bolt in the four hangers provided on the side of main body one by one.

3. Lower the indoor unit till the hangers rest on their respective flat washer.

4. Adjust the level in the top down direction by adjusting the suspension bolts.

Inclined the indoor unit as per direction provided in the fig

: Installation Information For Declination

1.

Install declination

of the indoor unit is very

important for the drain

of the convertible type air conditioner.

2. Minimum thickness of the insulation for the connecting pipe shall be 10mm.

3. If the Installation Plates are fixed to horizontal line, the indoor unit after installing will be declined to the bottomside.

Front of view

• The unit must be horizontal or inclined at angle.

• The inclination should be less than or equal to 1° or in between 10 to 20mm inclined in drain direction as shown in fig.

Ceiling

10~20mm

(3/8~3/4 inch)

Side of view

• The unit must be declined to the bottomside of the unit when finished installation.

Ceiling

5~10mm

(3/16 to 3/8 inch)

10

Indoor Unit

Installation

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.

Copper tube

90

°

Slanted Uneven Rough

Pipe

Reamer

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.

Point down

3. 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.

4. Check

■

Compare the flared work with figure below.

■

If flare is noted to be defective, cut off the flared section and do flaring work again.

Bar

"A"

Bar

Handle

Yoke

Cone

Copper pipe

Clamp handle

Red arrow mark

Smooth all round

Inside is shining without scratches.

= Improper flaring =

Even length all round

Inclined Surface damaged

Cracked Uneven thickness

Opening shutoff valve

1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.

2. Turn it until the shaft stops.

Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a backseat type. Always use the special tool.

3. Make sure to tighten the cap securely.

Closing shutoff valve

1. Remove the cap and turn the valve clockwise with the hexagon wrench.

2. Securely tighten the valve until the shaft contacts the main body seal.

3. Make sure to tighten the cap securely.

* For the tightening torque, refer to the table on the below.

Installation Manual

11

Installation

HEAT INSULATION

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over

120°C).

Fastening band

(accessory)

2. Precautions in high humidity circumstance:

This air conditioner has been tested according to the

"ISO 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), water drops are liable to fall. In this case, add heat insulation material according to the following procedure:

Indoor unit

• Heat insulation material to be prepared... EPDM

(Ethylene Propylene Diene Methylene)-over 120°C the heat-resistance temperature.

• Add the insulation over 10mm thickness at high humidity environment.

Refrigerant piping

Thermal insulator

(accessory)

12

Indoor Unit

Installation

Checking the Drainage

1. Set the air direction louvers up-and-down to the position(horizontally) by hand.

To check the drainage.

1. Pour a glass of water on the evaporator using a kettle.

2. Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.

Drain piping

1. The drain hose should point downward for easy drain flow.

Downward slope

2. Do not make drain piping like the following.

Do not raise

Accumulated drain water

Air

Water leakage

Water leakage

Waving

Water leakage

Tip of drain hose dipped in water

Less than

50mm gap

Ditch

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.

Terminal Block Indoor

1(L1) 2(L2) 3(A) 4(B)

Outdoor unit Indoor unit Central controller

SODU SODU IDU IDU INTERNET DRY1 DRY2 GND

12V

Outdoor unit

INDOOR POWER INPUT

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

Installation Manual

13

Installation

Connection method of the connecting cable(Example)

1(L1) 2(L2)

3(A) 4(B)

Power Supply

High Voltage

(208/230V)

Transmission

Conduit

Lock nut

Conduit mounting plate

WARNING : Loose wiring may cause the terminal to overheat or result in unit malfunction.

A fire hazzard may also exist.

Therefore, be sure all wiring is tightly connected.

CAUTION:

After the confirmation of the above conditions, prepare the wiring as follows:

1) Never fail to have an individual power specialized for the air conditioner. As for the method of wiring, be guided by the circuit diagram posted on the inside of control box cover.

2) Provide a circuit breaker switch between power source and the unit.

3) The screws which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation. Check them and make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the wires.)

4) Specification of power source

5) Confirm that electrical capacity is sufficient.

6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate.

7) Confirm that the cable thickness is as specified in the power sources specification.

(Particularly note the relation between cable length and thickness.)

8) Never fail to equip a leakage breaker where it is wet or moist.

9) The following troubles would be caused by voltage drop-down.

• Vibration of a magnetic switch, damage on the contact point, fuse breaking, disturbance by the normal function of an overload protection device.

• Proper starting power is not given to the compressor.

HAND OVER

Teach the customer the operation and maintenance procedures, using the operation manual.

(air filter cleaning, temperature control, etc.)

14

Indoor Unit

Installation

Side Cover Assembly

1. Cover the sides of main body with sidecover as shown in fig.

2. Lift slightly the edge of side-cover with hands to fix the cover properly on the panel.

3. Push the side-cover from front side (air outlet side) towards the inlet grill side to lock the side cover on the main body.

4. Fasten the securing screw.

Cover the Sides

Lift the edge with hand

Installation Manual

15

Installation

Installation of Wired Remote Controller

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

12V SIG GND

12V

SIG

GND

Red wire

Yellow wire

Black wire

❊

The wired remote controller cable is connected as factory default.

Red

Yellow

Black

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.

<Front side of installation board>

Remote Controller

Cable

<Rear side of installation board>

Guide slot

Top

Bottom

Fixate the remote controller cable to the guide slot.

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

Installation board

Wall

Side

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 it’s 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.

Wall

Side

Wall

Side

Wall

Side

Wall

Side

16

Indoor Unit

Installation

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

Check whether the connector is connected correctly.

Indoor unit side

Connecting cable

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.

Installation Manual

17

Installation

Optional Operation of Wired Remote Controller

Two Thermistor System

1. Press button for 4 seconds to enter the installer setting mode until timer segment display “01:01”.

2. Repeat pressing button to select Function code 04.

04:01

Function Code Thermistor setting

3. Set Thermistor mode by pressing button

(01: Remote Controller,

02: Indoor, 03: 2TH)

4. Press button to save or release

5. Press button to exit or system will automatically exit after 25 seconds without any input.

❈

Therefore system will use value that sensed from indoor unit or remote controller

Temperature sensor location

01

02

03

Remote controller

Indoor unit

2-Thermistor

Function

Operation in remote controller Temperature sensor

Operation in indoor unit temperature sensor

Operation in lower temperature after comparing the temperature between the indoor unit and remote controller

❈

If you want to know more Optional Operation, please refer to Wide Wired Remote Controller Manual.

18

Indoor Unit

Installation

Dip Switch Setting

SW1

SW2

SW3

Function

Communication

Cycle

Group Control

Description

N/A (Default)

N/A (Default)

Selection of Master or Slave

Setting Off

-

-

Master

Setting On

-

-

Slave

SW4

SW5

Dry Contact Mode

Installation

Selection of Dry Contact

Mode

CST – No function

Duct – Fan continuous operation

CVT – Selection of ceiling or floor

Console – Concealed or not

Wired/Wireless remote controller

Selection of Manual or Auto operation Mode

-

Continuous operation

Removal

Ceiling

General installation

SW6

SW7

SW8

Heater linkage

Ventilator linkage

Vane selection

(Console)

Etc.

N/A

Selection of Ventilator linkage

Selection of up/down side

Vane

Spare

-

Linkage Removal

Up side + Down side Vane

-

Auto

-

Working

Floor

Concealed installation

-

Working

Up side Vane

Only

-

Default

Off

Off

Off

Off

Off

Off

Off

Off

For Multi V Models, Dip switch 1, 2, 6, 8 must be set OFF.

That dip switch is used for other models.

Installation Manual

19

Installation

Group Control Setting

1. Group Control 1

■

Wired remote controller 1 + Indoor units

LGAP Network System

Master Slave

Display Error Message

Slave

Only connect serial signal and GND lines between slave indoor unit

Slave

GND

Signal

12 V

Master

1. It is possible to 16 indoor units(Max) by one wired remote controller.

Set only one indoor unit to Master, set the others to Slave.

2. It is possible to connect with every type of indoor units.

3. It is possible to use wireless remote controller at the same time.

4. It is possible to connect with Dry Contact and Central controller at the same time.

The Master indoor unit is possible to recognize Dry Contact and Central controller only.

5. In case of any error occurs at indoor unit, display on the wired remote controller.

Exception of the error indoor unit, an individual indoor unit control possibility.

6. In case of Group Control, be limited additional functions of indoor unit.

- Selection of operation options (stop/mode/temperature)

- Control of flow rate (strong/middle/weak)

- Time reservation function

- Elevation grille

❈

All kind of indoor units be set possible using a wireless remote controller, except cassette and duct types.

Refer to wireless remote controller manual for setting group control.

❈

It is possible to connect indoor units since Feb. 2009.

In the other cases, please contact LGE.

20

Indoor Unit

2. Group Control 2

■

Wired remote controllers + Indoor units

Installation

LGAP Network System

Master

Slave

Don’t connect serial 12V line

Slave Slave

GND

Signal

12 V

Master

Display Error Message

Slave

1. It is possible to control N indoor units by wired remote controller M units. (M+N

≤

17 Units)

Set only one indoor unit to Master, set the others to Slave.

Set only one wired remote controller to Master, set the others to Slave.

Other than those, it is same with the Group Control 1.

2. It is possible to connect with every type of indoor units.

3. It is possible to use wireless remote controller at the same time.

4. It is possible to connect with Dry Contact and Central controller at the same time.

The Master indoor unit is possible to recognize Dry Contact and Central controller only.

5. In case of any error occurs at indoor unit, display on the wired remote controller.

Exception of the error indoor unit, an individual indoor unit control possibility.

6. In case of Group Control, be limited additional functions of indoor unit.

- Selection of operation options (stop/mode/temperature)

- Control of flow rate (strong/middle/weak)

- Time reservation function

- Elevation grille

❈

All kind of indoor units be set possible using a wireless remote controller, except cassette and duct types.

Refer to wireless remote controller manual for setting group control.

❈

It is possible to connect indoor units since Feb. 2009.

In the other cases, please contact LGE.

Installation Manual

21

Installation

3. 2 Remote Control

■

Wired remote controller 2 + Indoor unit 1

LGAP Network System

Master

Display Error Message

Master Slave

1. It is possible to connect two wired remote controllers with one indoor unit.

2. Every types of indoor unit is possible to connect two remote controller.

3. It is possible to use wireless remote controller at the same time.

4. It is possible to connect with Dry Contact and Central controller at the same time.

5. In case of any error occurs at indoor unit, display on the wired remote controller.

6. There isn’t limits of indoor unit function.

GND

Signal

12 V

22

Indoor Unit

P/No.: MFL42803123

Printed in Korea

After reading this manual, keep it in a place easily accessible to the user for future reference.