LG Electronics Air Conditioner LS305HV User Manual

LG  
LG  
Room Air Conditioner  
INSTALLATION MANUAL  
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.  
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Wall Mounted Mini-Split System  
Single Zone  
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.  
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.  
WARNING  
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 Manual  
3
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Safety Precautions  
Safety Precautions  
To prevent the injury of the user or other people and property damage, the following instructions  
must be followed.  
I Be sure to read before installing the air conditioner.  
I Be sure to observe the cautions specified here as they include important items related to safety.  
I 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.  
I The meanings of the symbols used in this manual are as shown below.  
Be sure not to do.  
Be sure to follow the instruction.  
I Installation  
Always perform grounding.  
Dont use a power cord, a  
plug or a loose socket which  
is damaged.  
For installation of the product,  
always contact the service  
center or a professional  
installation agency.  
Otherwise, it may cause  
electrical shock.  
Otherwise, it may cause a fire  
or electrical shock.  
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.  
Always install an air leakage  
breaker and a dedicated  
switching board.  
Do not keep or use flammable  
gases or combustibles near  
the air conditioner.  
If the electrical part cover of the No installation may cause a fire Otherwise, it may cause a fire  
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.  
and electrical shock.  
or the failure of product.  
Ensure that an installation frame of the  
outdoor unit is not damaged due to use for a  
long time.  
Do not disassemble or repair the product  
randomly.  
It may cause injury or an accident.  
It will cause a fire or electrical shock.  
4
Room Air Conditioner  
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Safety Precautions  
Do not install the product at a place that there  
is concern of falling down.  
Use caution when unpacking and installing.  
Otherwise, it may result in personal injury.  
Sharp edges may cause injury.  
I Operation  
Do not share the outlet with  
other appliances.  
Do not use the damaged  
power cord.  
Do not modify or extend the  
power cord randomly.  
It will cause an electric shock Otherwise, it may cause a fire Otherwise, it may cause a fire  
or a fire due to heat  
generation.  
or electrical shock.  
or electrical shock.  
Take care so that the power  
cord may not be pulled  
during operation.  
Unplug the unit if strange  
sounds, smell, or smoke  
comes from it.  
Keep the flames away.  
Otherwise, it may cause a fire Otherwise, it may cause  
Otherwise, it may cause a fire.  
or electrical shock.  
electrical shock or a fire.  
Take the power plug out if  
necessary, holding the head  
of the plug and do not touch  
it with wet hands.  
Do not use the power cord  
near the heating tools.  
Do not open the suction  
inlet of the indoor/outdoor  
unit during operation.  
Otherwise, it may cause a fire Otherwise, it may cause a fire Otherwise, it may electrical  
or electrical shock.  
and electrical shock.  
shock and failure.  
Do not allow water to run  
into electrical parts.  
Hold the plug by the head  
when taking it out.  
Never touch the metal parts  
of the unit when removing  
the filter.  
Otherwise, it may cause the  
failure of machine or electrical  
shock.  
It may cause electric shock  
and damage.  
They are sharp and may  
cause injury.  
Do not step on the indoor/outdoor unit and  
do not put anything on it.  
Do not place a heavy object on the power  
cord.  
It may cause an injury through dropping of the Otherwise, it may cause a fire or electrical  
unit or falling down.  
shock.  
When the product is submerged into water,  
always contact the service center.  
Take care so that children may not step on  
the outdoor unit.  
Otherwise, it may cause a fire or electrical  
Otherwise, children may be seriously injured  
shock.  
due to falling down.  
Installation Manual  
5
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Safety Precautions  
I Installation  
Install the drain hose to ensure that drain  
can be securely done.  
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 water leakage.  
Otherwise, it may cause dispute with the  
neighbors.  
Always inspect gas leakage after the  
installation and repair of product.  
Keep level parallel in installing the product.  
Otherwise, it may cause the failure of product.  
Otherwise, it may cause vibration or water  
leakage.  
I Operation  
Avoid excessive cooling and perform  
ventilation sometimes.  
Use a soft cloth to clean. Do not use wax,  
thinner, or a strong detergent.  
Otherwise, it may do harm to your health.  
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.  
Do not place obstacles around the flow inlet  
or outlet.  
Otherwise, it may damage your properties.  
Otherwise, it may cause the failure of appliance  
or an accident.  
6
Room Air Conditioner  
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Introduction  
Introduction  
Symbols used in this Manual  
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  
Features  
Air Inlet  
Front Panel  
Air Filter  
Signal Receptor  
Air Intake Vents  
Connecting  
Wires  
Air Outlet Vents  
Drain Hose  
Base Plate  
Installation Manual  
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7
Installation  
Installation  
Read carefully, and then follow step by step.  
Installation Parts  
Installation plate  
Type "A" screw and plastic anchor  
Remote control holder  
Type "B" screw  
Installation Tools  
Figure  
Name  
Figure  
Name  
Screw driver  
Ohmmeter  
Electric drill  
Hexagonal wrench  
Measuring tape, Knife  
Hole core drill  
Ammeter  
Gas-leak detector  
Thermometer,  
Horizontal meter  
Spanner  
Torque wrench  
Flaring tool set  
8
Room Air Conditioner  
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Installation  
Installation Map  
NOTICE  
Installation parts you should purchase.  
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.  
Air Discarge  
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.  
Forced Operation Button  
Saddle  
Gas side piping  
Liquid side piping  
Additional drain pipe  
(Optional Parts)  
(Optional Parts)  
Air Inlet Vents  
Air Outlet Vents  
Vinyl tape (Narrow)  
Drain Hose  
Connecting cable  
(Optional Parts)  
Base Plate  
NOTE: refrigerant line wall thickness must be at least 0.8 mm(0.031 inch)  
Installation Manual  
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9
Installation  
Confirm The Refrigerant  
1. Check the quality label on the indoor and outdoor unit.  
2. Make certain that the refrigerant is R-410A.  
NOTICE  
THIS PRODUCT CONTAINS R-410A REFRIGERANT  
1) Different compressor oil  
- R-410A(Polyol ester) / R-22(Mineral).  
- Do not mix the existing mineral oil.  
- Do not apply used pipe, tools and gauges covered with the existing mineral oil.  
2) Absorption of moisture  
-Compressors oil has the high absorption rate of moisture.  
3) Composition  
- R-410A(R32:R125=50:50wt%).  
NOTE: Never mix with other refrigerants  
Example : Split type 12,000 Btu/h  
120  
100  
93  
100  
80  
60  
40  
20  
89  
84  
76  
0
R-410A  
R-22  
100%  
70%  
50%  
30%  
0%  
0%  
30%  
50%  
70% 100%  
4) High pressure.  
- 1.6 times higher than R-22.  
- High Pressure refrigerant may cause personal injury.  
Boiling Pt.(°C)  
Vapor pressure(25°C)(kg f/cnf)  
Vapor density(25°C)(kg/m2)  
R-410A  
R-22  
-51.4  
-40.8  
15.9  
9.6  
64  
44.4  
Do not handle the pipe by yourself (customer) High-pressure refrigerant may cause personal injury.  
- manifold gauge ,charging and any piping tools must be dedicated to R-410A systems.  
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Installation  
Select the best Location  
Indoor unit  
1. Do not have any heat or steam near the unit.  
More than  
10cm(3.9in)  
2. Select a place where there are no obstacles  
in front of the unit.  
More than  
20cm(7.9in)  
3. Make sure that condensation drainage can be  
conveniently routed away.  
More than  
10cm(3.9in)  
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(3.9in). The unit should be installed as  
high as possible on the wall, allowing a  
minimum of 20cm(7.9in) from ceiling.  
More than  
2.3m(7.6ft)  
6. Use a stud finder to locate studs to prevent  
unnecessary damage to the wall.  
Install the indoor unit on the wall where the height from the floor is more than 2.3 meters(7.6ft).  
A minimum pipe run of 7.5 meters(24.6ft) is required to minimize vibration & excessive noise  
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.  
More than 60cm(23.6in)  
More than  
30cm(11.8in)  
More than  
30cm(11.8in)  
2. Ensure that the space around the back and  
sides is more than 30cm(11.8in). The front of  
the unit should have more than 70cm(27.6in)  
of space.  
More than  
70cm(27.6in)  
More than  
60cm(23.6in)  
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.  
Installation Manual 11  
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Installation  
Piping Length and Elevation  
Max.  
Elevation B  
m(ft)  
Max.  
Length A  
m(ft)  
Pipe Size  
LIQUID  
Capacity  
(Btu/h)  
Additional Refrigerant  
g/m(oz/ft)  
Standard Length  
m(ft)  
GAS  
5/8"  
30k  
1/4"  
7.5(25)  
7(23)  
30(98)  
20(0.22)  
Indoor unit  
Outdoor unit  
Outdoor unit  
A
A
A
Oil trap  
B
Indoor unit  
Outdoor unit  
Indoor unit  
B
B
If piping length is more than 5m(16.4ft)  
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(16.4~23.0ft).  
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Installation  
Fixing Installation Plate  
The wall you select should be strong and solid  
enough to prevent vibration  
Installation Plate  
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.  
Chassis  
Hook  
Type "A" screw  
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.  
C
D
Distance mm(in)  
CHASSIS  
(Grade)  
B
Installation plate  
A
A
B
C
D
Left rear piping  
Right rear piping  
SD  
120(4.7)  
110(4.3)  
43(1.7)  
43(1.7)  
3. Install after removing one of the indicated  
cutting phase according to the installation  
location of the indoor unit's piping.  
Cutting Phase  
Drill a Hole in the Wall  
Drill the piping hole with a ø70mm(2.76in)  
hole core drill. Drill the piping hole at either  
the right or the left with the hole slightly  
slanted to the outdoor side.  
WALL  
Indoor  
Outdoor  
Installation Manual 13  
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Installation  
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.  
1. Use the piping kit accessory or the pipes  
purchased locally.  
Copper  
pipe  
Slanted Uneven Rough  
2. Measure the distance between the indoor and  
the outdoor unit.  
90°  
3. Cut the pipes a little longer than measured  
distance.  
4. Cut the cable 1.5m(59.1in) longer than the pipe  
length.  
Pipe  
Burrs removal  
Reamer  
1. Completely remove all burrs from the cut cross  
section of pipe/tube.  
Point down  
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  
Flare nut  
Remove flare nuts attached to indoor and  
outdoor unit, then put them on pipe/tube having  
completed burr removal.  
Copper tube  
(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.  
Handle  
Yoke  
Bar  
Bar  
Outside diameter  
A
mm  
Ø6.35  
Ø9.52  
Ø12.7  
Ø15.88  
Ø19.05  
inch  
1/4  
3/8  
1/2  
5/8  
3/4  
mm  
Cone  
1.1~1.3  
1.5~1.7  
1.6~1.8  
1.6~1.8  
1.9~2.1  
Copper pipe  
Clamp handle  
Red arrow mark  
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Installation  
Check  
Smooth all round  
1. Compare the flared work with the figure by.  
Inside is shiny without scratches  
2. If a flared section is defective, cut it off and  
do flaring work again.  
= Improper flaring =  
Inclined Surface Cracked Uneven  
damaged  
thickness  
Even length  
all round  
Connecting the Piping  
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.  
For right rear piping  
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.  
Drain hose  
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.  
Tape  
Connecting  
pipe  
Drain hose  
Connecting cable  
Installation Manual 15  
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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.  
Connecting  
cable  
Drain hose  
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.  
Indoor unit tubing  
Flare nut Pipes  
2. Tighten the flare nut with a wrench.  
Open-end wrench (fixed)  
Outside diameter  
Torque  
.
mm  
inch  
1/4  
3/8  
1/2  
5/8  
kg m  
Flare nut  
Ø6.35  
Ø9.52  
Ø12.7  
Ø15.88  
1.8~2.5  
3.4~4.2  
5.5~6.6  
6.3~8.2  
Wrench  
Connection pipe  
Indoor unit tubing  
3. When extending the drain hose at the indoor  
unit, install the drain pipe.  
Drain pipe  
Indoor unit drain hose  
Vinyl tape(narrow)  
Adhesive  
Wrap the insulation material around the  
connecting portion.  
Plastic bands  
Insulation material  
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.  
Indoor unit pipe  
Wrap with vinyl tape  
Connection pipe  
Vinyl tape (wide)  
2. Wrap the area which accommodates the rear  
piping housing section with vinyl tape.  
Connecting cable  
Pipe  
Vinyl tape(narrow)  
Wrap 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.  
Pipe  
Vinyl tape(wide)  
Drain hose  
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Installation  
For left rear piping  
1. Route the indoor tubing and the drain hose to  
the required piping hole position.  
1
2
Connecting  
cable  
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.  
Drain pipe  
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.  
Indoor unit  
Spacer  
Installation plate  
8cm  
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.  
Indoor unit tubing  
Flare nut Pipes  
2. Tighten the flare nut with a wrench.  
Open-end wrench (fixed)  
Outside diameter  
Torque  
.
mm  
inch  
1/4  
3/8  
1/2  
5/8  
kg m  
Flare nut  
Ø6.35  
Ø9.52  
Ø12.7  
Ø15.88  
1.8~2.5  
3.4~4.2  
5.5~6.6  
6.3~8.2  
Wrench  
Connection pipe  
Indoor unit tubing  
3. When extending the drain hose at the indoor  
unit, install the drain pipe.  
Drain hose  
Indoor unit drain hose  
Vinyl tape (narrow)  
Adhesive  
Installation Manual 17  
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Installation  
Wrap the insulation material around the  
connecting portion.  
Plastic bands  
Insulation material  
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.  
Indoor  
unit piping  
Connection  
pipe  
Vinyl tape  
(wide)  
Wrap with vinyl tape  
Pipe  
Vinyl tape(narrow)  
Connecting cable  
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.  
Pipe  
Drain hose  
Vinyl tape(narrow)  
Wrap with  
vinyl tape(wide)  
Reroute the pipings and the drain hose  
across the back of the chassis.  
Piping for  
passage through  
piping hole  
Indoor unit installation  
1. Remove the spacer.  
Connecting  
cable  
2. Ensure that the hooks are properly seated on  
the installation plate by moving it left and  
right.  
Drain hose  
3. Press the lower left and right sides of the unit  
against the installation plate until the hooks  
engage into their slots(clicking sound).  
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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.  
Installation Manual 19  
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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.  
Outdoor unit  
Liquid side piping  
(Smaller diameter)  
When tightening the flare nut with torque  
wrench, ensure the direction for tightening  
follows the arrow on the wrench.  
Gas side  
piping  
(Bigger  
diameter)  
Outside diameter  
Torque  
mm  
Ø6.35  
Ø9.52  
Ø12.7  
Ø15.88  
Ø19.05  
inch  
1/4  
3/8  
1/2  
5/8  
3/4  
kg.m  
1.8~2.5  
3.4~4.2  
5.5~6.6  
6.3~8.2  
9.9~12.1  
Torque wrench  
20 Room Air Conditioner  
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Installation  
Connecting the Cables  
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.)  
The earth wire should be longer than the common wires.  
The circuit diagram is not subject to change without notice.  
When installing, refer to the electrical diagram behind the front panel of Indoor Unit.  
The wiring for the outdoor unit can be found on the inside of the Outdoor Unit control cover.  
The circuit diagram is not subject to change without notice.  
Be sure to connect wires according to the wiring diagram.  
Connect the wires firmly, so that not to be pulled out easily.  
Connect the wires according to color codes by referring to the wiring diagram.  
Main power source  
Provide a circuit breaker between  
power source and the outdoor unit as  
shown below.  
Air  
Circuit Breaker  
Use a circuit breaker  
or time delay fuse.  
Conditioner  
Fuse or breaker  
Capacity  
Model  
30k  
Power source  
1ø,230/208V  
30A  
The power cord connected to the outdoor unit should be complied with the following  
specifications (ETL recognized and CSA certified).  
AWG14  
30k  
Power supply cable (230/208V)  
The power connecting cable connected to the indoor and outdoor unit should be  
complied with the following specifications (ETL recognized and CSA certified).  
AWG18  
Power supply cable (230/208V)  
When using the separate wire as the power cord, please fix the separate wire into the  
control box panel by using tie wrap as the fixture.  
Installation Manual 21  
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Installation  
Outdoor  
1. Remove the cover control from the unit by  
loosening the screw.  
Connect the wires to the terminals on the  
control board individually as the following.  
Outdoor unit  
Terminal block  
2. Secure the cable onto the control board with  
the holder (clamper).  
Over 5mm  
(0.2")  
Power supply  
cord  
Conduit panel  
3. Refix the cover control to the original position  
with the screw.  
Connecting  
cable  
Wiring Diagram  
Cover control  
NOTICE  
1. Separately wire power supply cord and connecting cable.  
2. Use heat-proof electrical wiring capable of withstanding temperature up to 75°C(167°F).  
3. 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.  
22 Room Air Conditioner  
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Installation  
Power supply cable  
Strand wire  
How to connect wiring to the terminals  
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.  
Round  
terminal  
(3) Using a round terminal fastener or pliers,  
securely clamp each stripped wire end with a  
round terminal.  
Connecting cable  
(4) Position the round terminal wire, and replace  
and tighten the terminal screw using a  
screwdriver.  
Loosening the  
terminal block  
screw  
Fastening the  
wire tightly  
Connecting cable  
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(0.12") in  
each active(phase) conductors.  
Installation Manual 23  
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Installation  
Checking the Drainage  
To check the drainage.  
1. Pour a glass of water on the evaporator.  
Connecting area  
drain hose  
2. Ensure the water flows through the drain  
hose of the indoor unit without any leakage  
and goes out the drain exit.  
Leakage  
checking  
Drain pan  
Drain  
hose  
Leakage  
checking  
Drain piping  
1. The drain hose should point downward for  
easy drain flow.  
Downward slope  
2. Do not make drain piping like the following.  
Accumulated  
Do not raise  
drain water  
Less than  
50mm gap  
Tip of drain hose  
dipped in water  
Air  
Water  
leakage  
Water  
leakage  
Water  
leakage  
Waving  
Ditch  
24 Room Air Conditioner  
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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.  
Seal small openings  
around pipings with a  
gum type sealer.  
Taping  
Drain hose  
Pipings  
Connecting cable  
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.  
Trap is required to prevent water  
from entering into electrical parts.  
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.  
Seal a small opening  
around the pipings  
with gum type sealer.  
1. Tape the piping and connecting cable from  
down to up.  
Trap  
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.  
Trap  
Installation Manual 25  
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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 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.  
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.  
Manifold valve  
Indoor unit  
Pressure  
gauge  
Lo  
Hi  
Bubbles indicate a leak. Be sure to  
wipe off the soap with a clean  
cloth.  
Charge hose  
Outdoor unit  
2. After the system is found to be free  
of leaks, relieve the nitrogen  
Nitrogen gas  
cylinder(in vertical  
standing position)  
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.  
26 Room Air Conditioner  
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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.  
Liquid side  
Gas side  
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.  
2-way valve  
(Open)  
3-way valve  
(Close)  
5. If bubbles come out, the pipes have leakage  
Evacuation  
Cap  
Hexagonal wrench  
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.  
Indoor unit  
Required time for evacuation when 30 gal/h vacuum  
pump is used  
If tubing length is longer  
than 10m (33 ft)  
If tubing length is less  
than 10m (33 ft)  
Outdoor unit  
10 min. or more  
15 min. or more  
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 service 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.  
Manifold valve  
Pressure  
gauge  
Lo  
Hi  
3. Loosen the charge hose connected to the gas  
side service port slightly to release the pressure,  
then remove the hose.  
Open  
Close  
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.  
Vacuum pump  
Installation Manual 27  
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Installation  
Test Running  
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.  
NOTICE  
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  
Bolt  
nut[ø10mm(0.39in)] 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.  
Tubing connection  
3. If the vibration of the unit is transmitted to the  
hose, secure the unit with an anti-vibration  
rubber.  
Evaluation of the performance  
Intake temperature  
Operate the unit for 15~20 minutes, then check  
the system refrigerant charge:  
Discharge air  
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  
Discharge  
temperature  
Outside ambient  
The pressure of the gas side  
service valve.  
4. For reference; the gas side pressure of  
optimum condition is as below.(Cooling)  
Refrigerant  
TEMP.  
R-22  
35°C (95°F)  
4~5kg/cm2G(56.8~71.0 P.S.I.G.)  
The air conditioner is now ready for use.  
R-410A  
35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)  
28 Room Air Conditioner  
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Installation  
NOTICE  
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.  
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/cm2 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.  
Installation Manual 29  
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Installation  
Installation guide at the seaside  
1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.  
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion  
on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunc-  
tion or inefficient performance.  
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it  
needs additional anticorrosion treatment on the heat exchanger.  
Selecting the location(Outdoor Unit)  
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.  
Install the outdoor unit on the opposite side of the sea wind direction.  
Sea wind  
Sea wind  
2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.  
It should be strong enough like concrete to prevent  
the sea wind from the sea.  
Windbreak  
The height and width should be more than 150% of  
the outdoor unit.  
Sea wind  
It should be keep more than 70 cm of space  
between outdoor unit and the windbreak for easy  
air flow.  
3) Select a well-drained place.  
1. If you cant meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.  
2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water  
30 Room Air Conditioner  
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P/No.: MFL39817301  
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