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LG DELUXE HIGH WALL MINI SPLIT Installation Instructions Manual

3828A30087L LSC091PMA

Made by: LG
Type: Installation Instructions
Category: Air Conditioner
Pages: 17
Size: 0.91 MB

 

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DELUXE HIGH WALL MINI SPLIT

INSTALLATION INSTRUCTIONS

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.

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-22 causes frostbite burns.
• R-22 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.

P/No:3828A30087J

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.

• 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.

WARNING

Special warnings

ENGLISH

 


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INSTALLATION OVERVIEW

2

The following should  be always
observed for safety....................3

Installation of indoor, outdoor
unit................................................4

Flaring work and connection of
piping ...........................................7

Connecting the cable between
indoor unit and outdoor unit..10

Checking the drainage and
Forming the piping ..................12

Air purging  ...............................14

Panel Front Assembly ............16

Test running .............................17

❏ 

Installation guide map

Four type "A" screws & plastic
anchors

Connecting cable

Pipes: Gas side ....................1/2"

Liquid side .................1/4"
(Refer to page 4)

Insulation materials

Additional drain pipe
Outer Diameter......15.5mm(

5

/

8

")

Two type "B" screws

Level gauge

Screw driver

Electric drill

Hole core drill Ø50mm(1.97")

Horizontal meter

Flaring tool set

Specified torque wrenches
Liquid side - 1.8kg.m(13ft.lbs):9K,12K,18K

4.0kg.m(28.9ft.lbs):24K

Gas side - 5.5kg.m(39.8ft.lbs):9K, 12K

6.6kg.m(47.7ft.lbs):18K, 24K 

(Refer to page 9)

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

A glass of water

Screw driver

Hexagonal wrench 4mm(

5

/

32

")

Gas-leak detector

Vacuum pump

Gauge manifold

Owner's manual

Thermometer

Holder Remote Control

Installation

Requirements

Required Parts

Required Tools

 


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ENGLISH

THE FOLLOWING SHOULD  BE ALWAYS OBSERVED FOR SAFETY

3

Be sure to read "THE FOLLOWING SHOULD BE ALWAYS OBSERVED FOR SAFETY" before installing the air
conditioner.

Be sure to observe the cautions specified here as they include important items related to safety.

The indications and meanings are as follows.

After reading this instructions, be sure to keep it together with the owner's manual in a handy place on the
customer's site.

WARNING

: Could lead to death, serious injury, etc.

CAUTION

: Could lead to serious injury in particular environments when operated

incorrectly.

WARNING

Incorrect installation could cause injury due to fire,
electric shock, the unit falling or leakage of water.
Consult the dealer from whom you purchased the
unit or special installer.

Do not install it yourself (customer).

When installed in an insufficiently strong place,
the unit could fall causing injury.

Install the unit securely in a place which can bear
the weight of the unit.

Incorrect connection and fixing could cause fire.

Use the specified wires to connect the indoor and
outdoor units securely and attach the wires firmly
to the terminal board connecting sections so the
stress of the wires is not applied to the sections.

If the electrical part cover of the indoor unit and/or
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.

Attach the electrical part cover to the indoor unit
and the service panel to the outdoor unit securely.

The use of defective parts could cause an injury
due to a fire, electric shock, the unit falling, etc.

Be sure to use the part provided or specified parts
for the installation work.

Check that the refrigerant gas does not leak after
installation is completed.

Incorrect installation could cause a personal
injury due to fire, electric shock, the unit falling
or leakage of water.

Perform the installation securely referring to the
installation instruction.

If the capacity of the power circuit is insufficient
or there is incomplete electrical work, it could
result in a fire or an electric shock.

Perform electrical work according to the installation
manual and be sure to use an exclusive circuit.

CAUTION

If there is a defect in the drainage/piping work,
water could leak from the unit and household
goods could get wet and be damaged.

Perform the drainage/piping work according 
to the installation instruction.

If gas leaks and accumulates in the area
surrounding the unit, it could cause an explosion.

Do not install the unit in a place where an
inflammable gas leaks.

 


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4

9K

1/2"

1/4"

7.5

7

15

20

(24.6ft)

(23ft)

(50ft)

12K

1/2"

1/4"

7.5

7

15

20

(24.6ft)

(23ft)

(50ft)

INSTALLATION OF INDOOR, OUTDOOR UNIT

Read completely, then follow step by step.

Select the best location 

Indoor unit

Do not have any heat or steam near the unit.

Select a place where there are no obstacles in
front of the unit.

Make sure that condensation drainage can be
conveniently routed away.

Do not install near a doorway.

Ensure that the space around the left and right
of the unit is more than 50cm(19.7”). The unit
should be installed as high on the wall as
possible, allowing a minimum of 10cm(3.9”)
from ceiling.

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

Outdoor unit

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.

Ensure that the space around the back
and sides is more than 10cm(3.9”). 
The front of the unit should have more
than 70cm(27.5”) of space.

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

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

Select a place so that the warm air and
noise from the air conditioner do not
disturb neighbors.

Rooftop Installations:
If the outdoor unit is installed on a roof structure, be
sure to level the unit. Ensure the roof structure and
anchoring method are adequate for the unit location.
Consult local codes regarding rooftop mounting.

Piping length and elevation

More than 10cm(3.9")

More than 50cm(19.7")

More than 2m(6.6ft)

More than 50cm(19.7")

More than 10cm(3.9")

More than 10cm(3.9")

More 
than 60cm(24")

More than 60cm(24")

More than 70cm(28")

Pipe Size

Capacity

(Btu/h)

GAS

LIQUID

Max. 

length

(m)

Additional

Refrigerant

(g/m)

Max.

Elevation

B

(m)

Standard

Length

(m)

In case more than 5m(16.4ft)

A

B

• 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(16.4~23ft).

Outdoor unit

Indoor unit

A

B

Outdoor unit

Indoor unit

A

B

A

Oil trap

Outdoor unit

Indoor unit

B

CAUTION

Install the indoor unit on the wall where the height
from the floors more than 2m(6.6ft).

CAUTION

 


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ENGLISH

5

Open panel front

First,Pull the grille bottom, then remove
screws(2 pieces), and close grille bottom
again.

■ 

The moment of lifting the both lower parts
of panel front, you can hear sound this
panel came out, In this time panel front is
separated

■ 

After pull down this panel a bit, and
separate connecting wire with product.

Pipe hole

Panel Front 

Connector

A

Cover pipe and cover side remove

Remove two screws(for fixing cover pipe)

■ 

Pull up the cover side of desired connecting
direction, then cover side is separated.

In case connecting direction is left or right, path
through the hole of cover side.

B

When connecting pipe path through rear
wall, don’t remove the hole.

Drain hose junction

Remove the rubber stopple of desired drain
direction.

■ 

As the following picture, Insert drain hose in the
handle of drain pan, and join drain hose and
connecting hose.

C

rubber cap

Only one

desiring direction

Connecting

part

Adhesive

Drain

hose

Preparing work for Installation

After removing the pipe hole, cut the burr for safety.

CAUTION

 


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Plastic anchors

INSTALLATION GUIDE MAP

10mm(0.39")

INST

ALLA

TION GU

IN

ST

AIIA

TIO

N GU

IDE M

AP

Put an Installation Guide Map
on the desired surface.

Make a hole with diameter of 6mm(0.24") 
and depth of 30-35mm(1.18"~1.38") when 
piercing a screw point.

Drive the fore plastic anchors into
drilled points.

Hang the hole of product at the upper
screws. (In this time, Remove the map)

(Falling attention)

Check the fixed product with light
power.

Look at suited horizon by horizontal
meter on the horizontal setting line,
and Fix lightly the map by adhesive 
tape.

Drill the piercing part for connecting
pipe as diameter 50mm(1.97").
(In case of piercing rear surface)

Refer to No. 5 on this page when making a hole in the wall.

First, Drive the two points of the
upper parts by screws.
(Leave 10mm(0.39") for hanging product)

Drive the lower parts after facing
the hole of product with plastic
anchors, and fix completely the
upper screws.

In case of nothing wrong in the matter,
connect the pipe and the wire. 
(Installation manual reference)

Horizontality

INS

TA

LL

AT

IO

N G

UID

E M

AP

Plastic anchors

IN

STA

LL

AT

IO

N G

UID

E M

AP

INST

ALLA

TIO

N GU

IDE M

AP

Hanger hole

(Rear side of 

product)

6

Preparing work for installation

Drill a hole in the wall

■ 

Drill the piping hole with a Ø50mm(1.97”)
hole core drill. Drill the piping hole at either
the right or the left with the hole slightly
slanted to the outdoor side.

5-7mm

(0.2~0.3")

Indoor

WALL

Outdoor

A

A

B

C

D

E

F

G

H

I

J

Sticking the installation guide map and fixing Indoor unit

 


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ENGLISH

7

FLARING WORK AND CONNECTION OF PIPING

Flaring work

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

Cut the pipes and the cable.

Use the piping kit accessory 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(4.9ft) longer than the pipe length.

Burrs removal

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

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.

A

B

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)

C

Copper

pipe

90

°

Slanted   Uneven  Rough

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Pipe

Reamer

Point down

Flaring work

Carry out flaring work using flaring tool as shown
below.

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

D

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.

E

Flare nut

Copper tube

Inclined

Inside is shiny without scratches

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

mm

inch

mm

Ø6.35

1/4

0~0.5

Ø9.52

3/8

0~0.5

Ø12.7

1/2

0~0.5

Ø15.88

5/8

0~1.0

Outside diameter

A

Connection of piping
-Indoor

■ 

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

Route the indoor tubing and the drain hose
in the direction of rear left or right

A

Drain hose

 


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8

Vinyl tape(narrow)

Connection
pipe

Connecting cable

Vinyl tape
(wide)

Wrap with vinyl tape

Indoor 
unit pipe

Pipe

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

Bundle the piping and drain hose together by
wrapping them with vinyl tape over the range
within which they fit into the rear piping housing
section.

Wrap with vinyl tape

Drain hose

Pipe

Vinyl tape(wide)

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
upper side can cause drain pan to overflow
inside the unit.

B

NOTE: 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.

Connecting
cable

Gas side piping

Liquid side piping

Drain hose

Loop

Wrap the insulation material around the
connecting portion.

■ 

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

D

Plastic bands

Insulation material

Vinyl tape(narrow)

Adhesive

Drain pipe

Indoor unit drain hose

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

Connecting the pipings to the in door unit and drain
hose to drain pipe

■ 

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

C

Indoor unit tubing

Flare nut

Pipings

Torque wrench

Indoor unit tubing

Spanner (fixed)

Connection pipe

Flare nut

Tighten the flare nut with a wrench.

Pipe Size[Torque]

GAS

LIQUID

9K

1/2"[5.5kg.m]

1/4"[1.8kg.m]

12K

1/2"[5.5kg.m]

1/4"[1.8kg.m]

Capacity

(Btu/h)

 


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ENGLISH

9

Connection of the
pipes-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.

A

B

Outdoor unit 

Liquid side piping
(Smaller diameter)

Gas side
piping
(Bigger
diameter)

Torque wrench

Outdoor unit 

Gas side piping
(Bigger diameter)

Liquid side
piping
(Smaller
diameter)

Torque wrench

Outdoor unit 

Liquid side piping
(Smaller diameter)

Gas side
piping
(Bigger
diameter)

Torque wrench

Pipe Size[Torque]

GAS

LIQUID

9K

1/2"[5.5kg.m]

1/4"[1.8kg.m]

12K

1/2"[5.5kg.m]

1/4"[1.8kg.m]

Capacity

(Btu/h)

Installation Information (For right piping)
• Good case

For right piping, follow the instruction below.

■ 

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

• Bad case

■ 

Following bending type from right to left could
cause problem of pipe damage.

CAUTION

■ 

Bend the tubing to the right side of chassis.

 


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CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT

10

1

Indoor  Unit

Outdoor  Unit

2

3

4

1

2

3

4

5

6

G

To
branch
circuit

Ground

Power  supply a

L1

*

L2

Connecting cable(Low  voltage)

b

Terminal

(4P)

Terminal

(6P)

Outdoor unit

Wiring Diagram

Terminal block

Over 5mm

(2")

Cover control

Conduit panel

Connecting 

cable

Power supply 

cord

*

 L1 is neutral for 115V models.

Connection of the cable

1. Remove the cover control from the unit

by loosening the 3 screws.

2. Dismount caps on the conduit panel.

3. Temporarily mount the conduit tubes on

the conduit panel.

4. Properly connect both the power supply

and low voltage lines to the
corresponding terminals on the terminal
block.

5. Ground the unit in accordance with local

codes.

6. Be sure to size each wire allowing

several inches longer than the required
length for wiring.

7. Use lock nuts to secure the conduit

tubes.

1.                          shows field wiring.
2. Separately wire the high and low voltage line.
3. Use heat-proof electrical wiring capable of

withstanding temperatures up to 167

°

F.

4. Use outdoor and waterproof connection cable

rated more than 300V for the connection between
indoor and outdoor unit.
(For example, Type SJO-WA)

• Be sure to comply with local codes while

running the wire from the indoor unit to
the outdoor unit(size of wire and wiring
method, etc).

• Every wire must be connected firmly.
• No wire should be allowed to touch

refrigerant tubing, the compressor or any
moving parts.

Connector trade size for this unit is 1/2".
Refer to "How to connect wiring to the
terminals" for instructions on connecting
depending on the wire type you are using.

WARNING

NOTE

NOTE

Power Supply

Model

Power source

9K

1ø, 115V

14

18

15A

12K

1ø, 115V

14

18

20A

AWG(MIN.)

Fuse or breaker

Capacity

 


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ENGLISH

11

G

Terminal
block

Cap
(Remove)

Clamp cord

Lock nut

Conduit panel

Loop

Round
terminal

Screw with
special washer

Screw with
special washer

Round terminal

Terminal plate

Wire

Wire

Round terminal

Insulation

Str

ip 25mm(15/16")

Str

ip 10mm(3/8")

Solid wire

Cap(Reuse)

Taping

(for sealing)

Low voltage line

(connecting cable)

Power supply line
(1ø, 115V, 208/230V)

Hole

(for low voltage line) 

Strand wire

Connection method of the
connecting cable(Example)

(1) Dismount two-caps on the conduit panel.
(2) Make a hole appropriate for the passage of

connection cable through on cap by tool.
(for low voltage line)

(3) Pass the connecting cable through the hole.
(4) Properly connect the cable on the terminal block.
(5) Fix the connection cable with clamp cord

provided on the unit not to have strain at the
terminal when the connection cable is pulled
outside up to a 35 pound weight.

(6) Wind the vinyl tape round the connecting cable

for sealing between the surface of the
connection cable and cap.

(7) Mount the taped part of cable on the cap.
(8) Finally, mount the holed cap with the 

wound cable on the conduit panel.

When connecting each power wire to the
corresponding terminal, follow instructions "How to
connect wiring to the terminals" and fasten the wire
tightly with the fixing screw of the terminal plate.

How to connect wiring to the terminals

For solid core wiring (or F-cable)

(1) Cut the wire end with a wire cutter of wire-

cutting pliers, then strip the insulation to expose
the solid wire about 25mm(15/16")

(2) Using a screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using pliers, bend the solid wire to from a loop

suitable for the terminal screw.

(4) Shape the loop wire properly, place it on the

terminal plater and tighten securely with the
terminal screw using a screwdriver.

For strand wiring

(1) Cut the wire end with a wire cutter or wire-

cutting pliers, then strip the insulation to expose
the strand wiring about 10mm(3/8").

(2) Using a screwdriver, remove the terminal

screw(s) on the terminal plate.

(3) Using a round terminal fastener or pliers,

securely clamp each stripped wire end with a
round terminal.

(4) Position the round terminal wire, and replace

and tighten the terminal screw using a
screwdriver.

Loose wiring may cause the terminal to
overheat or result in unit malfunction. A fire
hazard may also exist. Therefore, be sure all
wiring is tightly connected.

WARNING

 


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12

CHECKING THE DRAINAGE AND FORMING THE PIPINGS

Form 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.

Tape the piping, drain hose and
connecting cable from down to up.

Secure the tapped piping along the exterior
wall using saddle or equivalent.

A

A

B

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.

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

Tape the piping and connecting cable from
down to up.

Secure the taped piping along the exterior wall.
Form a trap to prevent water entering the room.

Fix the piping onto the wall by saddle or
equivalent.

C

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

Trap

Trap

Checking the drainage

To check the drainage.

■ 

Pour a glass of water on the evaporator.

■ 

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

Drain piping

■ 

The drain hose should point downward for
easy drain flow.

B

■ 

Do not make drain piping.

Downward slope

Do not raise

Accumulated
drain water

Tip of drain hose 
dipped in water

Air

Waving

Water
leakage

Water
leakage

Ditch

Less than 
50mm gap

Water
leakage

 


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13

ENGLISH

CAUTION

CAUTION

Air

Conditioner

Circuit Breaker
Use a circuit
breaker or time
delay fuse.

Main power source

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

Connecting cable

Connect the cable to the indoor unit

1. 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.
(Refer to Wiring diagram on page10.)

• Be sure to refer to the wiring diagram label

inside the grille and carry out the correct
field wiring.
Wrong wiring can cause the unit to misoperate
to result in a fire hazard.

• Check local electrical codes and any specified

wiring instructions or limitations.

WARNING

 


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14

AIR PURGING 

Air purging

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

Pressure in the system rises.

Operating current rises.

Cooling(or heating) efficiency drops.

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

Water may lead to corrosion of parts in the
refrigeration system.

Therefore, the indoor unit and tubing between
the indoor and outdoor unit must be leak tested
and evacuated to remove any noncondensables
and moisture from the system.

Air purging with vacuum
pump

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.

Leak test

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

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

Lo

Hi

Indoor unit

Outdoor unit

Manifold valve

Charge hose

Nitrogen gas
cylinder(in vertical
standing position)

Pressure 
gauge

A

B

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.

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.

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.

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.

CAUTION

CAUTION

 


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15

ENGLISH

Evacuation

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.

When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and stop the
vacuum pump.

Finishing the job

With a service valve wrench, turn the valve stem
of liquid side valve counter-clockwise to fully
open the valve.

Turn the valve stem of gas side valve
counter-clockwise to fully open the valve.

Loosen the charge hose connected to the gas side
service port slightly to release the pressure, then
remove the hose.

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.

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.

C

D

(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.

Soap water method

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

 


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16

PANEL FRONT ASSEMBLY

First, Check the side cover assembly exactly,
Fix power cord in the bottom groove of cover
side left.

A

B

Assemble connecting lead wire with controller
and first fix the upper part of panel front, then
match the lower part of panel front

Panel Front

Connector

C

Drive two screws.

 


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17

ENGLISH

TEST RUNNING

Settlement of outdoor unit

■ 

Anchor the outdoor unit with a bolt and nut Ø10mm(0.39")
tightly and horizontally on a concrete or rigid mount.

■ 

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.

■ 

In the case when the vibration of the unit is conveyed to the
hose, secure the unit with an anti-vibration rubber.

1. Check that all tubing and wiring have been

properly connected.

2. Check that the gas and liquid side service valves

are fully open.

Prepare remote control

Remove the battery cover 
by pulling it according to the

arrow direction.

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

Reattach the cover by

pushing it back into position.

NOTE:

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

rechargeable batteries.

• Remove the batteries from the remote control if the

system is not going to be used for a long time.

Evaluation of the performance

Operate 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.

NOTE: If the actual pressure are 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.

The air conditioner is now ready for use.

A

C

B

Bolt

Tubing connection

This is performed when the unit is to be
relocated or the refrigerant circuit is serviced.
Pump Down means collecting all refrigerant in the
outdoor unit without loss in refrigerant gas.

CAUTION:
Be sure to perform Pump Down procedure with the
unit 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 from the manifold hose using the refrigerant
gas.

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

G(14.2 to 7.1 P.S.I.G.), fully close the

gas side valve stem and then quickly turn off the
unit. At that time, Pump Down has been completed
and all refrigerant gas will have been collected in
the outdoor unit.

PUMP DOWN

3. Ensure the difference between the intake

temperature and the discharge is more than 8°C
(46°F)

4. For reference; the gas side pressure of optimum

condition is as below.(Cooling)

Discharge 
temperature

Discharge air

Intake temperature

R-22

35°C (95°F)

4~5kg/cm

2

G(56.8~71.0 P.S.I.G.)

Outside ambient

TEMP.

Refrigerant

The pressure of the gas side 

service valve.