LG
LG Floor Standing Type
Air Conditioner
INSTALLATION MANUAL
IMPORTANT
• Please read this installation manual completely before
installing the product.
• Installation work must be performed in accordance with
the national wiring standards by authorized personnel
only.
• Please retain this installation manual for future reference
after reading it thoroughly.
P/No.: 3828A20025V
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
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.
WARNING
This symbol indicates the possibility of injury or damage.
CAUTION
I Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
WARNING
I Installation
Do not use a defective or
underrated circuit breaker. Use
this appliance on a dedicated
circuit.
For electrical work, contact the
dealer, seller, a qualified
electrician, or an Authorized
Service Center.
Always ground the product.
• There is risk of fire or
electric shock.
•
Do not disassemble or repair
the product. There is risk of
fire or electric shock.
• There is risk of fire or
electric shock.
Install the panel and the cover of
control box securely.
Always install a dedicated
circuit and breaker.
Use the correctly rated breaker
or fuse.
• There is risk of fire or
electric shock.
• Improper wiring or
installation may cause fire or
electric shock
• There is risk of fire or
electric shock.
Installation Manual
3
Safety Precautions
Do not modify or extend the power cable.
Be cautious when unpacking and installing the
product.
• There is risk of fire or electric shock.
•
Sharp edges could cause injury. Be especially
careful of the case edges and the fins on the
condenser and evaporator.
For installation, always contact the dealer or an
Authorized Service Center.
Do not install the product on a defective
installation stand.
• There is risk of fire, electric shock, explosion,
or injury.
• It may cause injury, accident, or damage to
the product.
Be sure the installation area does not
deteriorate with age.
Do not let the air conditioner run for a long time when
the humidity is very high and a door or a window is
left open.
•
If the base collapses, the air conditioner could fall with
it, causing property damage, product failure, and
personal injury.
• Moisture may condense and wet or damage
furniture.
I Operation
Do not store or use flammable gas or combustibles
near the product.
• There is risk of fire or failure of product.
Gasolin
4
Floor Standing type Air Conditioner
Safety Precautions
CAUTION
I Installation
Always check for gas (refrigerant) leakage after
installation or repair of product.
Install the drain hose to ensure that water is
drained away properly.
• Low refrigerant levels may cause failure of
product.
• A bad connection may cause water leakage.
Keep level even when installing the product.
Do not install the product where the noise or hot air
from the outdoor unit could damage the
neighborhoods.
• To avoid vibration or water leakage.
• It may cause a problem for your neighbors.
90˚
Use two or more people to lift and transport the
product.
Do not install the product where it will be
exposed to sea wind (salt spray) directly.
• Avoid personal injury.
• It may cause corrosion on the product.
Corrosion, particularly on the condenser and
evaporator fins, could cause product
malfunction or inefficient operation.
Installation Manual
5
Installation of Unit
Installation of Unit
Selection of the best location
1. Indoor unit
• There should not be any heat source or
steam near the unit.
• There should not be any obstacles to
prevent the air circulation.
• A place where air circulation in the room
will be good.
• A place where drainage can be easily
obtained.
5cm
40cm
40cm
100cm
• A place where noise prevention is taken
into consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows
from the wall, ceiling, or other obstacles.
• The indoor unit must keep the
maintenance space.
2. Outdoor unit
Sunr
oof
• If an awning is built over the unit to prevent
direct sunlight or rain exposure, be careful
that heat radiation from the condenser is
not restricted.
• There should not be any animals or plants
which could be affected by hot air
discharged.
More than
50cm
More than
350cm
Fence or
obstacles
• Ensure the spaces indicated by arrows
from the wall, ceiling, fence or other
obstacles.
More than 50cm
More than 100cm
6
Floor Standing type Air Conditioner
Installation of Unit
3. Piping length and the elevation
Max.
Length
A (m)
Max.
Elevation
B (m)
PIPE SIZE
MODEL
(BTU/h)
GAS SIDE
LIQUID SIDE
20k/28k/30k/40k
44k/48k/50k/55k/60k
80k
5/8"
3/4"
1"
3/8"
3/8"
5/8"
30
40
50
20
25
30
Indoor unit
A
Outdoor unit
B
CAUTION:
• 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
7
Installation of Unit
The Indoor Unit Installation
Wall
Core Drill
200mm
70mm
70mm
1. The mounting floor should be strong and solid
enough to prevent it from vibration.
INSIDE
OUTSIDE
Wall
2. Drill the piping hole with 70mm diameter hole-
core drill at either the right or the left of indoor
unit. The hole should be sightly slant to the
outdoor side.
Plastic tube
(Bushing)
Tilt
3. Insert the plastic tube through the hole.
4. Cut the extruded outside part of the plastic
tube, if necessary.
Cut if necessary
More than 15mm
Outdoor unit Installation
1. Install the outdoor unit on the concrete or any solid base securely and horizontally by securing it
with bolts (Ø12mm) and nuts.
2. If there is any vibration transmitted to the building, mount the rubber underneath the outdoor unit.
Refrigerant amount
Before shipment, this air conditioner is filled
REFRIGERANT CHARGE
30g/m (1.06oz/m)
MODEL
with the rated amount of refrigerant including
additional amount required for air-purging,
subject to 7.5m piping length. (The rated
amount of refrigerant is indicated on the name
plate.) But when the piping length exceeds 7.5
meters, additional charge is required according
to the following table.
20k/28k/30k/40k
(BTU/h)
44k/48k/50k/55k/60k
(BTU/h)
40g/m (1.41oz/m)
80k
(BTU/h)
80g/m (2.82oz/m)
Example) 28k/30k
In case of 10m long pipe(one-way), the amount
of refrigerant to be replenished is:
(10-7.5) x 30 = 75g
(10-7.5) x 1.06 = 2.65oz
8
Floor Standing type Air Conditioner
Installation of Unit
Installation guide at the seaside
CAUTION
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 can’t 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
Installation Manual
9
Installation of Unit
Installation Method
No.
1
Installation works
Preparation of tools and installation parts
Flaring the pipes
Descriptions
Preparation of installation
2
To insert the flare nuts, mounted on the
connection parts of both indoor and
outdoor unit, onto the copper pipes.
3
4
Pipe bending
To reduce the flow resistance of refrigerant.
Connection of long piping
Connection of installation parts
(elbows, socket etc)
5
6
7
8
Tighten the flare nut (outdoor)
Blowing the pipings
Connecting the pipings of the outdoor unit.
To remove dust and scale in working.
Connecting the pipings of the indoor unit.
Tighten the flare nut (indoor)
Check a gas-leakage of the connecting
part of the pipings.
9
Vacuum drying of the piping and indoor unit
The air which contains moisture and which
remains in the refrigeration cycle may cause a
malfunction on the compressor
10
Open the 3-way (liquid side) and
3-way (gas side) valves.
11
12
13
Form the pipings
To prevent heat loss and sweat
Checking the drainage (indoor unit)
To ensure if water flow drain hose of indoor unit.
Preparation of the operating
Connecting the cable between outdoor
and indoor unit
14
15
Connecting the main cable to outdoor unit
Supply the power to the crankcase heater
(Before the operating the unit)
To prevent the liquid back to the compressor.
(Heat pump only)
16
Cooling operation
(Use the remote control or display of the
indoor unit)
10 Floor Standing type Air Conditioner
Installation of Unit
Preparation of installation parts and tools
No.
1
Installation Parts, Tools
Flaring tool (Ø 6.35 - Ø 19.05)
Remear
Use
Flaring the pipes
2
Remove burrs from cut edges of pipes.
Cutting the pipings
3
Pipe cutter (MAX 35mm Copper pipe)
Wrench (H5, H4 hexagonal wrench)
Pipe bender
4
To open the service valve
Bending the pipings
5
6
Leak detector
Check a gas-leakage of connecting part
of the pipings
7
8
Manifold gauge
To measure the pressure, to charge the refrigerant
To connect the bombe
Charge-nipple
9
Vacuum pump
To remove the air in the pipe.
10
11
Charge cylinder balance
Bombe (Freon-22)
To measure the refrigerant amount
Gas charge
Cleaning the pipe
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Spanner
To tighten the connecting parts of the pipings
Monkey spanner
Driver(
,
)
Benchi (150mm)
Tapeline
Cutting the wires
To measure the length
Core drill
To make holes through the concrete wall and blocks
To measure the current and voltage
To measure the insulation resistance
To measure the intake and outlet air temperature of the indoor unit
To use the connecting pipings
To cover the connecting pipings
To finish the connecting pipings
To shut off the main power
Voltmeter, Amperemeter, Clampmeter
Insulation resistance tester
Glass thermometer
Copper tubes
Insulation material
Tape
Electrical Leakage Breaker
Cable
To connect the cable from outdoor unit to indoor unit
To remote the condensing water
Drain hose sockets, elbows
Installation Manual 11
Installation of Unit
Preparation of Piping
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
Copper
tube
Slanted Uneven Rough
90°
1. Cut the pipes and the cable.
• Use the accessory piping kit or the pipes
purchased locally.
• Measure the distance between the indoor
and the outdoor unit.
• Cut the pipes a little longer than measured
distance.
Pipe
Reamer
•
Cut the cable 1.5m longer than the pipe
length.
Point down
2. Burrs removal
• Completely remove all burrs from the cut
cross section of pipe/tube.
Flare nut
•
Put the end of the copper tube/pipe to
downward direction as you remove burrs in
order to avoid to let burrs drop in the tubing.
Copper tube
3. Putting nut on
• Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube
having completed burr removal.
(Not possible to put them on after flaring work)
Handle
Bar
Bar
4. Flaring work
"A"
Yoke
Cone
•
Carry out flaring work using dedicated
flaring tool for R-22 as shown below.
Outside diameter
A
Copper pipe
mm
inch
1/4
3/8
1/2
5/8
3/4
mm
Clamp handle
Ø6.35
Ø9.52
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
1.9~2.1
Red arrow mark
Ø12.7
Ø15.88
Ø19.05
Smooth all round
Inside is shining without scratches
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
= Improper flaring =
5. Check
Inclined Surface Cracked Uneven
• Compare the flared work with figure below.
damaged
thickness
Even length
all round
• If flare is noted to be defective, cut off the
flared section and do flaring work again.
12 Floor Standing type Air Conditioner
Installation of Unit
Connection of piping
1. Move the indoor tubing and drain hose to the hole
• Remove tubing holder and pull the tubing out of the chassis.
2. Replace the tubing holder into original position
3. Route the tubing and the drain hose staight backwards.
4. Insert the connecting cable into the indoor unit through the hole.
• Do not connect the cable to the indoor unit
• Make a small loop with the cable for easy connection later.
5. Tape the tubing and the connecting cable.
6. Indoor unit installation.
7. Connecting the pipings to the indoor unit.
PIPE SIZE
1/4"
TORQUE
1.8~2.5 kgf·m
3.4~4.2 kgf·m
5.5~6.6 kgf·m
6.3~8.2 kgf·m
9.9~12.1 kgf·m
3/8"
1/2"
5/8"
3/4"
Indoor unit tubing
Spanner
Flare nut Pipings
Torque wrench
• Align the center of the pipings and suffciently
tighten the flare nut with fingers.
• Finally, tighten the flare nut with troque
wrench until the wrench clicks.
When tightening the flare nut with troque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
Precautions in bending
1. If it is necessary to bend or stretch the
tubing, use the spring which is attached to
the tubing in stead of pipe bender.
• Please make a careful notice to make a
smooth line.
Spring
R70mm
• Hold the tubing with your two hands closely
and then bend or stretch it slowly not to
make any crack.
• Remember that the radius (R) should not
exceed 70mm (Refer to Fig. 1)
(Fig. 1)
2. Do not repeat the bending process to prevent
the tubing from cracking or crushing.
R
3. Keep in mind that the bending part should
not be cracked and make the radius (R) as
long as possible (Refer to Fig. 2)
(Fig. 2)
Installation Manual 13
Installation of Unit
Connecting the Cable to Indoor Unit
• The inside and outside connecting cable can be connected after opening the inlet grille.
1. Open the inlet grille manually.(Fig.1)
2. Open the terminal block cover with driver( ).
3. Connect the cables(LG doesn't sypply) to the Terminal Block in the front Bracket. (Fig.2)
4. Secure the terminal block cover to the original position with the screw.
5. Insert the plastic tube(Bushing)in small hole in order to prevent the connecting wires
from being cut by sharp edge of the hole. (Fig. 3) , America, Canada only.
6. Close the inlet grille.
(Fig.2)
(Fig.1)
Detail Wiring of Fig.2
2. Heating Model
1. Cooling Model
(America, Canada only)
3(L1) 4(L2) 5 6 7
1(L) 2(N) 3 4 5
1(L) 2(N) 3 4 5
Outdoor unit
Outdoor unit
Outdoor unit
Insert the plastic tube
(America, Canada only)
(Fig.3)
14 Floor Standing type Air Conditioner
Installation of Unit
Connecting pipings to the outdoor unit .
1. Align the center of the pipings and
sufficiently tighten the flare nut with fingers.
2. 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
Gas side piping
follows the arrow on the wrench.
Outdoor unit
Liquid side piping
Torque wrench
PIPE SIZE
1/4"
TORQUE
1.8~2.5 kgf·m
3.4~4.2 kgf·m
5.5~6.6 kgf·m
6.3~8.2 kgf·m
9.9~12.1 kgf·m
3/8"
1/2"
5/8"
3/4"
Connecting the cables to the outdoor unit
1. Open the control board cover from the
outdoor unit by removing the screws.
2. Connect wires to the terminals on the control
board individually and secure the cables
onto the control board with clamp.
3. Secure the control board cover to the
original position with the screws.
CAUTION: Perform grounding
• This product should be grounded.
• Defective grounding could cause an
electric shock.
Terminals on the indoor unit
3(L1) 4(L2)
5
6
7
4(L2)
Terminals on the outdoor unit 1(L1) 2(L2)
3(L1)
5
(America, Canada Only)
POWER INPUT
(America, Canada Only)
Installation Manual 15
Installation of Unit
Power Supply and Wiring
The unit is completely wired internally at the
factory according to general rule of electrical
technology, but local rules, if they are required,
should be complied with.
Voltage
Power source voltage
working voltage
1. Power supply
Power source must fulfill the following
conditions:
Starting voltage
Starting point
Time
• The working voltage should be higher than
90% and lower than 110% of the rated
voltage marked on the name plate.
• The starting voltage should be higher than
85% of the rated voltage marked on the
name plate.
2. Wiring
After the confirmation of the above conditions, prepare the wiring as follows:
• Use the power supply cord(Rubber
insulation, type Ho7RNF approved by HAR
or SAA) suitable for the product's
electriccal capacity.
• The screws which fasten the wiring in the
casing of electrical fittings are liable to
come loose from vibrations to which the
unit is subjected during the course of
transportation. Check them and make sure
that they are all tightly fastened.
UNIT
Conductor
cross-sectional area
VOLTS
(BTU/h)
H/P
C/O
H/P
C/O
H/P
C/O
450/750V
450/750V
450/750V
450/750V
450/750V
450/750V
4.0mm2
4.0mm2
5.5mm2
5.5mm2
8.0mm2
8.0mm2
(If they are loose, it could give rise to burn-
out of the wires.)
20k/28k/
30k/40k
• See to it that the starting voltage is
maintained at more than 90 percent of the
rated voltage marked on the name plate.
44k/48k/
50k
80k
• The following troubles would be caused by
voltage drop-down.
Vibration of a magnetic switch, damage on
the contact point there of, fuse breaking,
disturbance to the normal function of a
overload protection device.
• Provide a recognized circuit breaker as
below between power source and unit.
A disconnection device to adequately
disconnect all supply lines must be fitted.
(for service operations)
*Separate main and heater power supply for
Z model. (Do not connect together to the
same power supply)
UNIT (BTU/h)
Circuit breaker capacity
H/P
C/O
H/P
C/O
H/P
C/O
H/P
C/O
30A
30A
40A
40A
30A
30A
50A
50A
20K/28K/
30K/40K
Unit (BTU/h)
Breaker
30A
Conductor
3.5mm2
20k/28k
30k/40k
44k/48k
50k/60k
80k
Heater
Wiring
Spec.
1 Phase
44K/48K/
55K/60K
40A
50A
5.5mm2
8mm2
44K/48K/
50K/60K
3 Phase
80K
16 Floor Standing type Air Conditioner
Installation of Unit
Vacuum Drying of the Connecting Pipes and the Indoor Unit
The air which contains moisture remaining in the refrigeration cycle may cause a malfunction on the
compressor.
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service
port by the charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below -
76cmHg.
5. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon
wrench.
6. Tighten the valve stem nuts of the 2-way valve and 3-way valve.
7. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque: 1.8kg.m)
Liquid side
Indoor unit
Closed
Outdoor unit
2-way valve/
3-way valve
Gas side
3-way
valve
Closed
Vaccum pump
OPEN
CLOSE
Installation Manual 17
Installation of Unit
Form the Piping
1. Wrap the connecting portion of indoor unit
with the insulation material and secure it with
two Plastic Bands. (for the right piping)
• If you connect an additional drain hose,
the end of the drain-outlet should be kept
distance from the ground. (Do not dip it
into water, and fix it on the wall to avoid
swinging in the wind.)
Gas side
piping
Main cable
In case of the outdoor unit is installed below
position of the indoor unit.
Tube PE
Foam
2. Tape the Piping, and Connecting Cable from
down to up.
Connecting
Cable
Connecting
Cable
3. Form the piping gathered by taping along the
exterior wall and fix it onto the wall by saddle
or equivalent.
(For heater)
Trap is required to prevent the electrical parts
from entering the water.
In case of the outdoor unit is installed upper
position of the indoor unit.
Seal a small opening around
the piping with gum type sealer.
1. Tape the piping and connecting cable from
down to up.
Trap
2. In order to prevent water from entering the
room, form a trap and tape the piping.
3. Fix the piping onto the wall with saddle or
bracket.
Trap
Drain water treatment of outdoor unit(Heat
Pump Only)
1. When using the drain elbow hose, use
a mount of 3cm of higher.
2. In the cold district (0°c(32°F) continued for 2~3
day), the drain water is frozen and the fan fail
to function, do not use the drain elbow.
Drain elbow
Hose(inner diameter ø20)
Arrange the hose downward slope without waving.
18 Floor Standing type Air Conditioner
Final Check and Test Run
Final Check and Test Run
After installing the unit, perform the final check
and running test as follows:
Running test should be accomplished as follows:
Final check points
Set operation switch at "FAN" and the fan
will start. Check to ensure that the fan
sounds normal.
Is the unit securely mounted?
Is the installation location adequate?
Is the water piping work adequately and
without leakage?
Next, set it at "COOL" and the
compressor will start. Check to ensure
that the compressor sounds normal.
Are trapped drain lines installed at
condensate drain connections?
Check discharge and suction pressure on
the compound gauges.
Has the refrigeration cooling cycle been
kept sealed?
Check working voltage, phase balance
and running current.
Is the electrical wiring adequate and are
the screws tightened on terminals?
Check to ensure that the thermistor
functions properly.
After the above final checkings, prepare the
running test as follows:
Check to ensure that the high pressure
control switch functions correctly.
Connect compound gauges to the check
joints at discharge and suction sides of
the compressor.
Turn all switches "OFF".
Turn the main switch "ON".
Installation Manual 19
Memo
20 Floor Standing type Air Conditioner
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