LG S186FP S51, LS-C1264GB0 User Manual

ENGLISH

LG
Room Air Conditioner

INSTALLATION MANUAL

LG

website http://www.lgservice.com

IMPORTANT

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

• When the power cord is damaged, replacement should 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.

2 Room Air Conditioner

Room Air Conditioner Installation Manual

TABLE OF CONTENTS

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

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

Symbols used in this manual..........6

Features...........................................6

Installation..........................................7

Installation parts...............................7

Installation tools...............................7

Installation map................................8

Selecting the best location .............9

Piping length and elevation...........10

Fixing installation plate..................11

Drilling a hole in the wall...............11

Flaring work...................................12

Connecting the piping ..................13

Connecting the cables ..................19

Checking the drainage..................21

Forming the piping.........................22

Air purging......................................23

Test running ...................................25

❏ Four type "A" screws & plastic

anchors

❏ Connecting cable

❏ Installation guide map

❏ Pipes: Gas side

Liquid side

❏ Insulation materials
❏ Additional drain pipe

(Outer diameter ..............15.5mm)

❏ Two type "B" screws

❏ Level gauge
❏ Screw driver
❏ Electric drill
❏ Hole core drill(ø70mm)
❏ Horizontal meter

❏ Flaring tool set
❏ Specified torque wrenches

1.8kg.m, 4.2kg.m, 5.5kg.m,

6.6kg.m
(different depending on model No.)

❏ Spanner........................Half union

❏ A glass of water
❏ Screw driver

❏ Hexagonal wrench(4mm)
❏ Gas-leak detector
❏ Vacuum pump
❏ Gauge manifold

❏ Owner's manual
❏ Thermometer
❏ Remote control holder

Installation

Requirements

Required Parts Required T ools

Installation Manual 3

ENGLISH

Safety Precautions

To prevent the injury of the user or other people and proper ty damage, the following instructions
must be followed.

■ Be sure to read before installing the air conditioner.

■ Be sure to obser ve the cautions specified here as they include important items related to safety.

■ Incorrect operation due to ignoring instruction will cause har m or damage. The seriousness is

classified by the following indications.

■ The meanings of the 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

Always perform grounding.

• Otherwise, it may cause
electrical shock.

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 installation of the product,
always contact the service
center or a professional
installation agency.

• Otherwise, it may cause a fire,
electrical shock, explosion or
injury.

Securely attach the
electrical part cover to the
indoor unit and the service
panel to the outdoor unit.

• If the electrical part cover of
the indoor unit and the service
panel of the outdoor unit are
not attached securely, it could
result in a fire or electric
shock due to dust, water, etc.

Always install an air leakage
breaker and a dedicated
switching board.

• No installation may cause a
fire and electrical shock.

Do not keep or use
flammable gases or
combustibles near the air
conditioner.

• Otherwise, it may cause a fire
or the failure of product.

Ensure that an installation frame of the
outdoor unit is not damaged due to use for
a long time.

• It may cause injury or an accident.

Do not disassemble or repair the product
randomly.

• It will cause a fire or electrical shock.

4 Room Air Conditioner

Safety Precautions

Do not install the product at a place that
ther is concern of falling down.

• Otherwise, it may result in personal injury.

Use caution when unpacking and installing.

• Sharp edges may cause injury.

Take the power plug out if
necessary,holding the head
of the plug and do not touch
it with wet hands.

• Otherwise, it may cause a fire
or electrical shock.

Do not use the power cord
near the heating tools.

• Otherwise, it may cause a fire
and electrical shock.

Do not open the suction
inlet of the indoor/outdoor
unit during operation.

• Otherwise, it may electrical
shock and failure.

Do not allow water to run
into electrical parts.

• Otherwise, it may cause the
failure of machine or electrical
shock.

Hold the plug by the head
when taking it out.

• It may cause electric shock
and damage.

Never touch the metal parts
of the unit when removing
the filter.

• They are sharp and may
cause injury.

Do not share the outlet with
other appliances.

• It will cause an electric shock
or a fire due to heat
generation.

Do not use the damaged
power cord.

• Otherwise, it may cause a fire
or electrical shock.

Do not modify or extend the
power cord randomly.

• Otherwise, it may cause a fire
or electrical shock.

Take care so that the power
cord may not be pulled
during operation.

• Otherwise, it may cause a fire
or electrical shock.

Unplug the unit if strange
sounds, smell, or smoke
comes from it.

• Otherwise, it may cause
electrical shock or a fire.

Keep the flames away.

• Otherwise, it may cause a fire.

Do not step on the indoor/outdoor unit and
do not put anything on it.

• It may cause an injury through dropping of the
unit or falling down.

Do not place a heavy object on the power
cord.

• Otherwise, it may cause a fire or electrical
shock.

When the product is submerged into water,
always contact the service center.

• Otherwise, it may cause a fire or electrical
shock.

Take care so that children may not step on
the outdoor unit.

• Otherwise, children may be seriously injured
due to falling down.

■ Operation

Installation Manual 5

ENGLISH

Safety Precautions

■ Installation

Install the drain hose to ensure that drain
can be securely done.

• Otherwise, it may cause water leakage.

Install the product so that the noise or hot
wind from the outdoor unit may not cause
any damage to the neighbors.

• Otherwise, it may cause dispute with the
neighbors.

Always inspect gas leakage after the
installation and repair of product.

• Otherwise, it may cause the failure of product.

Keep level parallel in installing the product.

• Otherwise, it may cause vibration or water
leakage.

Avoid excessive cooling and perform
ventilation sometimes.

• Otherwise, it may do harm to your health.

Use a soft cloth to clean. Do not use wax,
thinner, or a strong detergent.

• The appearance of the air conditioner may
deteriorate, change color, or develop surface
flaws.

Do not use an appliance for special purposes
such as preserving animals vegetables,
precision machine, or art articles.

• Otherwise, it may damage your properties.

Do not place obstacles around the flow inlet
or outlet.

• Otherwise, it may cause the failure of appliance
or an accident.

■ Operation

6 Room Air Conditioner

Introduction

This symbol alerts you to the risk of electric shock.

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

This symbol indicates special notes.

NOTICE

Introduction

Symbols used in this Manual

Features

Air Intake Vents

Air Outlet Vents

Air Intake Vents

Air Outlet Vents

Connecting
Wires

Connecting
Wires

Piping

Piping

Drain Hose

Drain Hose

Base Plate

Base Plate

Air Inlet

Air Filter

Front Panel

Signal Receptor

Installation Manual 7

ENGLISH

Installation

Type "A" screw (6 EA) Type "A" screw (8 EA)

Type "B" screw Type "B" screw

Remote control holderRemote control holder

Type 1 Type 2

Installation plate Installation plate

Figure FigureName

Screw driver

Electric drill

Measuring tape, Knife

Hole core drill

Spanner

Torque wrench

Ohmmeter

Hexagonal wrench

Ammeter

Gas-leak detector

Thermometer,

Horizontal meter

Flaring tool set

Name

Installation Parts

Installation T ools

Installation

Read carefully, and then follow step by step.

8 Room Air Conditioner

Installation

Installation Map

Installation parts you should purchase.

Vertical Air deflector

Air Discarge

Forced Operation Button

Operation Indication Lamps/

Signal Receptor

Vinyl tape (Wide)

• Apply after carrying out a
drainage test.

• To carry out the drainage
test, remove the air filters
and pour water into the heat
exchanger.

Saddle

Gas side piping (Optional Parts)
Liquid side piping (Optional Parts)
Additional drain pipe

Vinyl tape (Narrow)
Drain Hose

Base Plate

Air Outlet Vents

Air Inlet Vents

Connecting cable
(Optional Parts)

Installation plate
Sleeve
Bushing-Sleeve

Putty(Gum Type Sealer)

Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.

NOTICE

Installation Manual 9

ENGLISH

Installation

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
10cm.The unit should be installed as high as
possible on the wall, allowing a minimum of
20cm from ceiling.

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

Outdoor unit

1. If an awning is built over the unit to prevent
direct sunlight or rain exposure, make sure
that heat radiation from the condenser is not
restricted.

2. Ensure that the space around the back and
sides is more than 30cm.The front of the unit
should have more than 70cm of space.

3. Do not place animals and plants in the path
of the warm air.

4.Take the weight of the air conditioner into
account and select a place where noise and
vibration are minimum.

5. Select a place where the warm air and noise
from the air conditioner do not disturb
neighbors.

Select the best Location

More than 20cm

More than

10cm

More than 2.3m

More than

10cm

Install the indoor unit on the wall where the height from the floor is more than 2.3 meters.

More than 30cm More than 30cm

More
than 60cm

More than 60cm

More than 70cm

10 Room Air Conditioner

Installation

Piping Length and Elevation

7k, 8k, 9k 3/8" 1/4" 7.5 7 15 20

11k, 12k, 14k 1/2" 1/4" 7.5 7 15 20

1/2" 1/4" 7.5 15 30 20

18k, 24k, 26k 5/8" 1/4" 7.5 15 30 20

5/8" 3/8" 7.5 15 30 30

Pipe Size

Capacity

(Btu/h)

GAS LIQUID

Max.

Length A (m)

Additional

Refrigerant (g/m)

Max.

Elevation B (m)

Standard

Length (m)

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

A

Oil trap

Outdoor unit

Indoor unit

B

If piping length is more than 5m

Capacity is based on standard length and maximum allowance length is on the basis of reliability.
Oil trap should be installed every 5~7 meters.

Installation Manual 11

ENGLISH

Installation

Fixing Installation Plate

• 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.

Drill a Hole in the Wall

5-7mm

(3/16"~5/16")

Indoor

WALL

Outdoor

The wall you select should be strong and
solid enough to prevent vibration

1. Mount the installation plate on the wall with

type "A" screws.If mounting the unit on a
concrete wall, use anchor bolts.

• Mount the installation plate horizontally by
aligning the centerline using a level.

2. Measure the wall and mark the centerline.

It is also important to use caution
concerning the location of the installation
plate-routing of the wiring to power outlets
is through the walls typically. Drilling the
hole through the wall for piping
connections must be done safely.

Chassis

Hook

Installation Plate

Type “A”

ABCD
S4 55 105 65 105
SE 70 110 90 110

S5/S8 100 122 240 122

CHASSIS

(Grade)

Distance (mm)

<Type 1>

<Type 1>

<Type 1>

Installation plate

Left rear piping Right rear piping

Ø70mm

133mm

Ø70mm

100mm

<Type 2>

Chassis

Hook

Installation Plate

Type “A”

<Type 2>

D

C

Ø70mm

Left rear piping Right rear piping

Installation plate

A

B

Ø70mm

12 Room Air Conditioner

Installation

Flaring W ork

Main cause for gas leakage is due to defect in flaring work.Carr y out correct flaring wor k in the
following procedure.

Cut the pipes and the cable.

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.

Burrs removal

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

2. Put the end of the copper tube/pipe in a
downward direction as you remove burrs in
order to avoid dropping burrs into the tubing.

Putting nut on

• 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 flaring work)

Flaring work

1. Firmly hold copper pipe in a die in the dimension
shown in the table below.

2. Carry out flaring work with the flaring tool.

Copper

pipe

90°

Slanted Uneven Rough

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

Outside diameter A

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Pipe

Reamer

Point down

Flare nut

Copper tube

Installation Manual 13

ENGLISH

Installation

Check

1. Compare the flared work with the figure by.

2. If a flared section is defective, cut it off and
do flaring work again.

Indoor

1. Prepare the indoor unit's piping and drain hose for installation through the wall.

2. Remove the plastic tubing retainer(see the
illustration by) and pull the tubing and drain
hose away from chassis.

3. Replace only the plastic tubing holder 1, not
the holder 2 in the original position.

1. Route the indoor tubing and the drain hose in
the direction of rear right.

2.

Insert the connecting cable into the indoor unit
from the outdoor unit through the piping hole.

• Do not connect the cable to the indoor unit.

• Make a small loop with the cable for easy

connection later.

3.Tape the tubing, drain hose, and the
connecting cable.Be sure that the drain hose
is located at the lowest side of the bundle.
Locating at the uper side can cause drain pan
to overflow inside the unit.

If the drain hose is routed inside the room,
insulate the hose with an insulation material*
so that dripping from "sweating"(condensation)
will not damage furniture or floors.
*Foamed polyethylene or equivalent is
recommended.

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

Connecting the Piping

For right rear piping

Drain hose

Tape

Connecting
pipe

Drain hose

Connecting cable

14 Room Air Conditioner

Installation

4. Indoor unit installation
Hook the indoor unit onto the upper portion of
the installation plate.(Engage the two hooks
of the rear top of the indoor unit with the
upper edge of the installation plate.) Ensure
that the hooks are properly seated on the
installation plate by moving it left and right.

Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots(clicking sound).

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

1. Align the center of the pipes and sufficiently
tighten the flare nut by hand.

2.Tighten the flare nut with a wrench.

3.When extending the drain hose at the indoor
unit, install the drain pipe.

Wrap the insulation material around the
connecting portion.

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

2.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 for enough to
cover where they fit into the rear piping
housing section.

Drain hose

Connecting

cable

mm inch kgf.m

Ø6.35 1/4" 1.8~2.5
Ø9.52 3/8" 3.4~4.2
Ø12.7 1/2" 5.5~6.6

Ø15.88 5/8" 6.3~8.2

Outside diameter Torque

Indoor unit tubing Flare nut Pipes

Open-end wrench (fixed)

Flare nut

Wrench

Indoor unit tubing

Drain pipe

Connection pipe

Connection pipe

Vinyl tape (wide)

Connecting cable

Pipe

Drain hose

Indoor unit drain hose

Vinyl tape(narrow)

Adhesive

Plastic bands

Vinyl tape(narrow)

Wrap with vinyl tape

Insulation material

Wrap with vinyl tape

Vinyl tape(wide)

Indoor unit pipe

Pipe

Installation Manual 15

ENGLISH

Installation

1. Route the indoor tubing and the drain hose to
the required piping hole position.

2. Insert the piping, drain hose, and the
connecting cable into the piping hole.

3.

Insert the connecting cable into the indoor unit.

• Don't connect the cable to the indoor unit.

• Make a small loop with the cable for easy

connection later.

4.Tape the drain hose and the connecting
cables.

5. Indoor unit installation

• Hang the indoor unit from the hooks at the

top of the installation plate.

• Insert the spacer etc. between the indoor

unit and the installation plate and separate
the bottom of the indoor unit from the wall.

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

1. Align the center of the pipes and sufficiently
tighten the flare nut by hand.

2.Tighten the flare nut with a wrench.

3.When extending the drain hose at the indoor
unit, install the drain pipe.

For left rear piping

mm inch kgf.m

Ø6.35 1/4" 1.8~2.5
Ø9.52 3/8" 3.4~4.2
Ø12.7 1/2" 5.5~6.6

Ø15.88 5/8" 6.3~8.2

Outside diameter Torque

1 2

Indoor unit

Installation plate

8cm

Spacer

Connecting

cable

Drain pipe

Indoor unit tubing Flare nut Pipes

Open-end wrench (fixed)

Flare nut

Wrench
Indoor unit tubing

Drain hose

Indoor unit drain hose

Vinyl tape

Adhesive

Connection pipe

(narrow)

16 Room Air Conditioner

Installation

Wrap the insulation material around the
connecting portion.

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

2.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 cloth tape over the range
within which they fit into the rear piping
housing section.

Reroute the pipings and the drain hose
across the back of the chassis.

Indoor unit installation

1. Remove the spacer.

2. Ensure that the hooks are properly seated on
the installation plate by moving it left and
right.

3. Press the lower left and right sides of the unit
against the installation plate until the hooks
engage into their slots(clicking sound).

Plastic bands

Insulation material

Connection
pipe

Vinyl tape
(wide)

Connecting cable

Wrap with vinyl tape

Pipe

Vinyl tape(narrow)

Indoor
unit piping

Drain hose

Piping for
passage through
piping hole

Pipe

Vinyl tape(narrow)

Wrap with
vinyl tape(wide)

Connecting

cable

Drain hose

Installation Manual 17

ENGLISH

Installation

Installation Information. For left piping.Follow the instruction below.

Good case

• Press on the upper side of clamp and unfold the tubing to downward slowly.

Bad case

• Following bending type from right to left may cause damage to the tubing.

18 Room Air Conditioner

Installation

Outdoor

Align the center of the pipings and sufficiently
tighten the flare nut by hand.

Finally, tighten the flare nut with torque wrench
until the wrench clicks.

• When tightening the flare nut with torque

wrench, ensure the direction for tightening
follows the arrow on the wrench.

mm inch kgf.m

Ø6.35 1/4" 1.8~2.5
Ø9.52 3/8" 3.4~4.2

Ø12.7 1/2" 5.5~6.6
Ø15.88 5/8" 6.3~8.2
Ø19.05 3/4" 9.9~12.1

Outside diameter Torque

Outdoor unit

Liquid side piping
(Smaller diameter)

Gas side
piping
(Bigger
diameter)

Torque wrench

Installation Manual 19

ENGLISH

Installation

Indoor

Connect the cable to the indoor unit by connecting the wires to the terminals on the control board
individually according to the outdoor unit connection. (Ensure that the color of the wires of the
outdoor unit and the terminal No. are the same as those of the indoor unit.)

Connecting the Cables

• The above circuit diagram is subject to change without notice.

• The earth wire should be longer than the common wires.

• When installing, refer to the circuit diagram behind the panel front of the indoor unit.

• Connect the wires firmly so that they may not be pulled out easily.

• Connect the wires according to color codes, referring to the wiring diagram.

If a power plug is not used, provide a circuit
breaker between power source and the unit as
shown by.

The power cord connected to the "A" unit should be selected according to the following
specifications(Type "B" approved by HAR or SAA).

The power connecting cable connecting the indoor and outdoor unit should be selected according
to the following specifications (Type "B" approved by HAR or SAA).

Air

Conditioner

Main power source

Circuit Breaker
Use a circuit breake
or time delay fuse.

5k~9k 12k~14k 18k 24k~28k 30k, 32k 36k, 38k

0.75 1.0 1.5 2.5 2.5 5.5

Unit(A) Indoor Indoor Indoor Indoor Outdoor Outdoor

Cable Type(B) H05VV -FH05VV-F H05VV-F H05VV-F H05RN-FH05RN-F

NORMAL CROSS

-SECTIONAL AREA

Grade

(mm2)

5k~9K 12k~14k 18k 24k~28k

0.75 1.0 1.5 2.5

Cable Type(B) H07RN-F H07RN-F H07RN-F H07RN-F

NORMAL

CROSS

-SECTIONAL
AREA

Grade

(mm2)

NORMAL
CROSS-SECTIONAL
AREA 0.75mm2

30k, 32k 36k, 38k

0.75 0.75

Cable Type(B) H07RN-F H07RN-F

NORMAL CROSS

-SECTIONAL AREA

Grade

(mm2)

20 Room Air Conditioner

Installation

Outdoor

1. Remove the control cover from the unit by
loosening the screw.
Connect the wires to the terminals on the
control board individually.

2. Secure the cable onto the control board with
the cord clamp.

3. Refix the control cover to the original position
with the screw.

4. Use a recognized circuit breaker 20A(14k)
between the power source and the unit.
A disconnecting device to adequately
disconnect all supply lines must be fitted.

1

(L)2(N)

34 1

(L)2(N)

34

CASE 1 CASE 2

Connecting
cable

7k~14k 18k 24k~28k 30k, 32k 36k, 38k

15 20 30 30 40

Circuit

Breaker

(A)

Grade

According to the confirmation of the above conditions, prepare the wiring as follows.

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

2.The screw 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 cause burn-out of the wires.)

3. Specification of power source.

4. Confirm that electrical capacity is sufficient.

5. See to that the starting voltage is maintained at more than 90 percent of the rated
voltage marked on the name plate.

6. Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness.

7. Always install an earth leakage circuit breaker in a wet or moist area.

8.The following would be caused by voltage drop.

• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of
the normal function of the overload.

9.The means for disconnection from a power supply shall be incorporated in the fixed
wiring and have an air gap contact separation of at least 3mm in each active(phase)
conductors.

Outdoor Unit

Cover control

Cord clamp

Installation Manual 21

ENGLISH

Installation

Checking the Drainage

To check the drainage.

1. Pour a glass of water on the evaporator.

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.

2. Do not make drain piping like the following.

Drain pan

Drain

hose

Leakage
checking

Connecting area

drain hose

Leakage
checking

Water
leakage

Accumulated
drain water

Waving

Air

Do not raise

Water
leakage

Water
leakage

Tip of drain hose
dipped in water

Ditch

Downward slope

Less than
50mm gap

22 Room Air Conditioner

Installation

Forming the Piping

Form the piping by wrapping the
connecting portion of the indoor unit
with insulation material and secure it
with two kinds of vinyl tapes.

• If you want to connect an additional drain
hose, the end of the drain outlet should be
routed above the ground.Secure the drain
hose appropriately.

In cases where the outdoor unit is
installed below the indoor unit
perform the following.

1.Tape the piping, drain hose and connecting

cable from down to up.

2. Secure the tapped piping along the exterior

wall using saddle or equivalent.

In cases where the Outdoor unit is
installed above the Indoor unit
perform the following.

1.Tape the piping and connecting cable from

down to up.

2. Secure the taped piping along the exterior

wall. Form a trap to prevent water entering
the room.

3. Fix the piping onto the wall by saddle or

equivalent.

Taping

Drain hose

Pipings

Connecting cable

Trap is required to prevent water
from entering into electrical parts.

Seal small openings
around pipings with a
gum type sealer.

Seal a small opening
around the pipings
with gum type sealer.

Trap

Trap

Installation Manual 23

ENGLISH

Installation

Air Purging

Air purging

The air and moisture remaining in the refrigerant system have undesirable effects as indicated below.

1. Pressure in the system rises.

2. Operating current rises.

3. Cooling(or heating) efficiency drops.

4. Moisture in the refrigerant circuit may freeze and block capillary tubing.

5.Water may lead to corrosion of parts in the refrigeration system.
Therefore, after evacuating the system, take a leak test for the piping and tubing between the
indoor and outdoor unit.

Air purging with vacuum pump

1. Preparation

• Check that each tube(both liquid and gas side tubes) between the indoor and outdoor units have been
properly connected and all wiring for the test run has been completed. Remove the service valve caps
from both the gas and the liquid side on the outdoor unit. Note that both the liquid and the gas side
service valves on the outdoor unit are kept closed at this stage.

2. Leak test

• Connect the manifold valve(with pressure gauges) and dry nitrogen gas cylinder to this service port with
charge hoses.

Be sure to use a manifold valve for air purging. If it is not available, use a stop valve for this
purpose.The "Hi" knob of the manifold valve must always be kept close.

• Pressurize the system to no more than 150 P.S.I.G. with dr y nitrogen gas and close the cylinder
valve when the gauge reading reached 150 P.S.I.G. Next, test for leaks with liquid soap.

To avoid nitrogen entering the refrigerant system in a liquid state, the top of the cylinder must be
higher than its bottom when you pressurize the system. Usually, the cylinder is used in a vertical
standing position.

1. Do a leak test of all joints of the
tubing(both indoor and outdoor)
and both gas and liquid side
service valves.
Bubbles indicate a leak. Be sure to
wipe off the soap with a clean
cloth.

2. After the system is found to be free
of leaks, relieve the nitrogen
pressure by loosening the charge
hose connector at the nitrogen
cylinder.When the system pressure
is reduced to normal, disconnect
the hose from the cylinder.

Lo Hi

Indoor unit

Outdoor unit

Manifold valve

Charge hose

Nitrogen gas
cylinder(in vertical
standing position)

Pressure
gauge

24 Room Air Conditioner

Installation

Soap water method

1. Remove the caps from the 2-way and 3-way valves.

2. Remove the service-port cap from the 3-way valve.

3.To open the 2-way valve turn the valve stem
counterclockwise approximately 90°, wait for about
2~3 sec, and close it.

4. Apply a soap water or a liquid neutral detergent on
the indoor unit connection or outdoor unit
connections by a soft brush to check for leakage of
the connecting points of the piping.

5. If bubbles come out, the pipes have leakage

Evacuation

1. Connect the charge hose end described in the

preceding steps to the vacuum pump to
evacuate the tubing and indoor unit.
Confirm the "Lo" knob of the manifold valve is
open.Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump.The
following table shows the time required for
evacuation.

2.When the desired vacuum is reached, close the

"Lo" knob of the manifold valve and stop the
vacuum pump.

Finishing the job

1.With a ser vice valve wrench, turn the valve stem

of liquid side valve counter-clockwise to fully
open the valve.

2.Turn the valve stem of gas side valve counter-

clockwise to fully open the valve.

3. Loosen the charge hose connected to the gas

side service port slightly to release the pressure,
then remove the hose.

4. Replace the flare nut and its bonnet on the gas

side service port and fasten the flare nut
securely with an adjustable wrench.This
process is very important to prevent leakage
from the system.

5. Replace the valve caps at both gas and liquid

side service valves and fasten them tight.
This completes air purging with a vacuum pump.
The air conditioner is now ready to test run.

Gas side

Liquid side

Cap

Hexagonal wrench

2-way valve

(Open)

3-way valve

(Close)

Required time for evacuation when 30 gal/h vacuum

pump is used

10 min. or more 15 min. or more

If tubing length is less

than 10m (33 ft)

If tubing length is longer

than 10m (33 ft)

Indoor unit

Outdoor unit

Lo Hi

Manifold valve

Vacuum pump

Pressure
gauge

Open

Close

Installation Manual 25

ENGLISH

Installation

1. Check that all tubing and wiring are properly connected.

2. Check that the gas and liquid side service valves are fully open.

Prepare remote controller

1. Remove the battery cover by pulling it
according to the arrow direction.

2. Insert new batteries making sure that the (+)
and (–) of battery are installed correctly.

3. Reattach the cover by pushing it back into
position.

• Use 2 AAA(1.5volt) batteries.Do not use
rechargeable batteries.

• Remove the batteries from the remote
controller if the system is not used for a long
time.

Settlement of outdoor unit

1. Anchor the outdoor unit with a bolt and
nut(ø10mm) tightly and horizontally on a
concrete or rigid mount.

2.When installing on the wall, roof or rooftop,
anchor the mounting base securely with a
nail or wire assuming the influence of wind
and earthquake.

3. If the vibration of the unit is transmitted to the
hose, secure the unit with an anti-vibration
rubber.

Evaluation of the performance

Operate the unit for 15~20 minutes, then check
the system refrigerant charge:

1. Measure the pressure of the gas side service
valve.

2. Measure the temperature of the intake and
discharge of air.

3. Ensure the difference between the intake
temperature and the discharge is more than
8°C

4. For reference;the gas side pressure of
optimum condition is as below.(Cooling)

The air conditioner is now ready for use.

NOTICE

Discharge
temperature

Discharge air

Intake temperature

R-22 35°C (95°F) 4~5kg/cm2G(56.8~71.0 P.S.I.G.)

R-410A 35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)

Outside ambient

TEMP.

Refrigerant

The pressure of the gas side

service valve.

Test Running

Bolt

Tubing connection

26 Room Air Conditioner

Installation

If the actual pressure is higher than shown, the system is most likely over-charged, and charge
should be removed.If the actual pressure are lower than shown, the system is most likely
undercharged, and charge should be added.

NOTICE

PUMP DOWN

This is performed when the unit is relocated or the refrigerant circuit is serviced.

Pump Down means collecting all refrigerant into the outdoor unit without the loss of refrigerant.

Be sure to perform Pump Down procedure in the cooling mode.

Pump Down Procedure

1. Connect a low-pressure gauge manifold hose to the charge port on the gas side service valve.

2. Open the gas side service valve halfway and purge the air in the manifold hose using the
refrigerant.

3. Close the liquid side service valve(all the way).

4.Turn on the unit's operating switch and start the cooling operation.

5.When the low-pressure gauge reading becomes 1 to 0.5kg/cm

2

G(14.2 to 7.1 P.S.I.G.), fully close
the gas side valve and then quickly turn off the unit.Now Pump Down procedure is completed,
and all refrigerant is collected into the outdoor unit.

P/No.: 3828A20510C