LG ARNU18GV1A4 INSTALLATION MANUAL [ar,en]

INSTALLATION MANUAL

AIR
CONDITIONER

ENGLISH

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.

Ceiling Suspended

Original instruction

ARNU18GV1A4 ARNU24GV1A4
ARNU36GV2A4 ARNU48GV2A4

P/NO : MFL70191401
REV.00_120517

www.lg.com

Ά

2

TIPS FOR SAVING ENERGY

ENGLISH

• 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:

TIPS FOR SAVING ENERGY

IMPORTANT SAFETY INSTRUCTIONS

3

ENGLISH

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.

• 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

• 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 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.

• 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 con-

denser and evaporator.

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

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

!

!

!

4

ENGLISH

Operation

IMPORTANT SAFETY INSTRUCTIONS

• 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.

• There is a risk of fire and explosion.

- Inert gas (nitrogen) should be used when you check plumbing leaks, cleaning or repairs of pipes
etc.
If you are using combustible gases including oxygen, product may have the risk of fires and explo­sions.

• 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.

• The air conditioner is not intended for use by young children or invalids without supervision.

• Young children should be supervised to ensure that they do not play with the air conditioner.

• When the power cord is to be replaced, replacement work shall be performed by
authorized personnel only using only genuine replacement parts.

• Installation work must be performed in accordance with the National Electric Code by qualified
and authorized personnel only.

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

- There is risk of fire or failure of product.

CAUTION

!

Installation

• 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.

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

- Avoid personal injury.

TABLE OF CONTENTS

5

ENGLISH

2 TIPS FOR SAVING EN-

ERGY

3 IMPORTANT SAFETY IN-

STRUCTIONS

6 PRODUCT PARTS
6 INSTALLATION TOOLS
7 INSTALLATION

7 Select the best Location

8 THE INDOOR UNIT IN-

STALLATION

9 Open side-cover
10 Mounting the anchor nut and bolt
12 Indoor unit drain piping
12 Drain piping
12 Drain test
13 Heat insulation
13 Flaring Work
16 Wiring Connection
17 DIP Switch Setting
18 Group Control Setting
23 Model Designation
23 Airborne Noise Emission
23 Limiting concentration

TABLE OF CONTENTS

6

PRODUCT PARTS

ENGLISH

PRODUCT PARTS

INSTALLATION TOOLS

Right side cover

Air filters
(behind inlet grille)

Air inlet vent
(inlet grille)

Louver

Figure FigureName

Screw driver

Air outlet vent

Left side cover

Name

Multi-meter

Electric drill

Measuring tape, Knife

Hole core drill

Spanner

Torque wrench

Hexagonal wrench

Ammeter

Gas-leak detector

Thermometer,

Level

Flaring tool set

INSTALLATION MAP

7

ENGLISH

INSTALLATION

Select the best Location

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

- There should not be any obstacles to prevent the air circulation.

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

- A place where drainage can be easily obtained.

- A place where noise prevention is taken into consideration.

- Do not install the unit near the door way.

- Ensure the spaces indicated by arrows from the wall, ceiling, or other obstacles.

- The indoor unit must keep the maintenance space.

10 (13/32)
or more

300 (11 – 13/16)
or more

2500 (98 – 3/7)
or more

700(27 – 9/16) or more

Floor

700(27 – 9/16) or more

unit:mm(inch)

8

THE INDOOR UNIT INSTALLATION

ENGLISH

THE INDOOR UNIT INSTALLATION

• Install the unit horizontally using a level
gauge.

• During the installation, care should be
taken not to damage electric wires.

• Select and mark the position for fixing
bolts and piping hole.

• Decide the position for fixing bolts
slightly tilted to the drain direction after
considering the direction of drain hose.

• Drill the hole for anchor bolt on the ceil­ing.

CAUTION

!

NOTE

!

• Avoid the following installation location.

1. Such places as restaurants and kitchen
where considerable amount of oil
steam and flour is generated.
These may cause heat exchange effi­ciency reduction, or water drops, drain
pump mal-function.
In these cases, take the following ac­tions;

• Make sure that ventilation fan is enough

to cover all noxious gases from this
place.

• Ensure enough distance from the cook-

ing room to install the air conditioner in
such a place where it may not suck oily
steam.

2. Avoid installng air conditioner in such
places where cooking oil or iron pow­der is generated.

3. Avoid places where inflammable gas is
generated.

4. Avoid place where noxious gas is gen­erated.

5. Avoid places near high frequency gen­erators.

Air conditioner

Take enough
distance

Cooking table

Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.

THE INDOOR UNIT INSTALLATION

9

ENGLISH

Open side-cover

Step 1

Backside

Right side cover

Backside

Left side
cover

Step 2

- Remove two screws from side-cover.

Step 3

Step 4

- Remove paper bracket from side-cover.

- Unlock side-cover from side-panel slightly
(Tap the side-cover with your palm on the
backside)

- Knock out the pipe hole from the left side­cover with nipper/plier.

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

CAUTION

!

10

THE INDOOR UNIT INSTALLATION

ENGLISH

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 anchor­nuts 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.

- The following parts is option.
Hanging Bolt - W 3/8 or M10
Nut - W 3/8 or M10
Spring Washer - M10
Plate Washer - M10

(Unit : mm)

Washer

Suspension

bolts

Chassis Code A B

VM1 ARNU**GV1A4 1018 355

VM2 ARNU**GV2A4 1418 355

Tighten the nut and bolt to prevent unit
from falling

• Drill the piping hole on the wall slightly
tilted to the outdoor side by using a
Ø 70 hole-core drill.

CAUTION

!

Anchor nut

Ceiling

Nut

Suspension

Suspension

bolts

bolts

Washer

Washer

A

Suspension bolt

B

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)

Wall

Indoor

Outdoor

Slope gradient for
drain Should be
1/50 ~ 1/100

Spring

washer

Hangen

12mm

Suspension

bolts

Max.

Nut

Washer

THE INDOOR UNIT INSTALLATION

11

ENGLISH

Installation information for declination

- Install declination of the indoor unit is very important for the drain of the convertible type air
conditioner.

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

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

CAUTION

!

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 20 mm inclined in drain
direction as shown in fig.

Ceiling

10~20 mm

Side of view

- The unit must be inclined to the bottomside of the unit when finished installation.

Ceiling

5~10 mm

12

THE INDOOR UNIT INSTALLATION

ENGLISH

Indoor unit drain piping

- Drain piping must have down-slope (1/50 to
1/100): be sure not to provide up-and-down
slope to prevent reversal flow.

- During drain piping connection, be careful
not to exert extra force on the drain port on
the indoor unit.

- Remove the rubber stopple before connect­ing drain hose.

- Hook on the bracket after connecting the
drain hose as below.

Drain piping

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

- Do not make drain piping like the following.

- Be sure to execute heat insulation on the
drain piping.

Drain test

Use the following procedure to test the drain
pump operation:

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

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

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

Drain hose

Bracket

Heat insulation material: Polyethylene foam
with thickness more than 8 mm.

Do not raise

Water
leakage

Tip of drain
hose dipped
in water

Water
leakage

Water
leakage

Ditch

Accumulated
drain water

Air

Waving

Less than
50 mm gap

Downward
slope

THE INDOOR UNIT INSTALLATION

13

ENGLISH

Heat insulation

Use the heat insulation material for the refrig­erant piping which has an excellent heat-resis­tance (over 120 °C).

Precautions in high humidity circumstance:
This air conditioner has been tested according
to the "KS Standard 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:

- Heat insulation material to be prepared...
Adiabatic glass wool with thickness 10 to 20
mm.

- Stick glass wool on all air conditioners that
are located in ceiling atmosphere.

Connecting cables to the indoor unit

- Remove the control box cover for electrical
connection between the indoor and out door
unit

- Use the cord clamper to fix the cord.

Flaring Work

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

1 Use the piping kit accessory or the pipes

purchased locally.

2 Measure the distance between the indoor

and the outdoor unit.

3 Cut the pipes a little longer than measured

distance.

4 Cut the cable 1.5m longer than the pipe

length.

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

2. While removing burrs put the end of the
copper tube/pipe in a downward direction
while removing burrs location is also
changed in order to avoid dropping burrs
into the tubing.

Control box cover

Cut the pipes and the cable

Burrs removal

Pipe

Reamer

Point down

Fastening band

Refrigerant piping

Indoor unit

Thermal insulator

Copper

pipe

90°

Slanted Uneven Rough

14

THE INDOOR UNIT INSTALLATION

ENGLISH

- Remove flare nuts attached to indoor and
outdoor unit, then put them on pipe/tube
having completed burr removal.
(not possible to put them on after finishing
flare work)

1 Firmly hold copper pipe in a bar with the di-

mension shown in below table table
below.

2 Carry out flaring work with the flaring tool.

1 Compare the flared work with the figure

by.

2 If a flared section is defective, cut it off

and do flaring work again.

1 Align the center of the pipes and suffi-

ciently tighten the flare nut by hand

2 Tighten the flare nut with a wrench

Putting nut on

Flaring work

Outside diameter

A

mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8

Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1

Check

Connecting the installation pipe
and drain hose to the indoor unit.

Outside diameter

Torque

mm inch kgf.m
Ø6.35 1/4 1.8~2.5
Ø9.52 3/8 3.4~4.2
Ø12.7 1/2 5.5~6.5

Ø15.88 5/8 6.3~8.2
Ø19.05 3/4 9.9~12.1

Flare nut

Copper tube

Bar

"A"

Bar

Handle

Yoke

Cone

Smooth all round

Even length

all round

Inside is shiny without scratches

= Improper flaring =

Surface

damaged

Cracked Uneven

Inclined

thickness

Indoor unit tubing Flare nut Pipes

Open-end wrench
(fixed)

Copper pipe

Clamp handle

Red arrow mark

Wrench

Indoor unit tubing

Flare nut

Connection
pipe

THE INDOOR UNIT INSTALLATION

15

ENGLISH

3 When needed to extend the drain hose of

indoor unit, assembly the drain pipe as
shown on the drawing

1 Overlap the connection pipe insulation ma-

terial and the indoor unit pipe insulation
material. Bind them together with vinyl
tape so that there may be no gap.

2 Set the tubing cutting line upward.

Wrap the area which accommodates the
rear piping housing section with vinyl tape.

3 Bundle the piping and drain hose together

by wrapping them with vinyl tape sufficient
enough to cover where they fit into the
rear piping housing section.

Wrap the insulation material
around the connecting portion.

Gas Pipe

Liquid Pipe

Cutting Line

Cutting Line

Good Case Bad Case

* Tubing cutting line have to be upward.

Vinyl tape(narrow)

Connection pipe

Connecting cable

Vinyl tape (wide)

Wrap with vinyl tape

Indoor unit pipe

Pipe

Drain pipe

Indoor unit drain hose

Vinyl tape(narrow)

Adhesive

Insulation material

Wrap with vinyl tape

Pipe

Vinyl tape(wide)

Drain hose