LG MFL59506845 User manual

P/NO : MFL59506845 www.lg.com
INSTALLATION MANUAL
AIR CONDITIONER
• 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.
TYPE : WALL MOUNTED
ENGLISH FRANCAIS ESPAÑOL

• Do not cool excessively indoors. This may be harmful for your health and may consume more
electricity.
• Block sunlight with blinds or curtains while you are operating the air conditioner.
• Keep doors or windows closed tightly while you are operating the air conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate indoor air.
• Speed up the fan to cool or warm indoor air quickly, in a short period of time.
• Open windows regularly for ventilation as the indoor air quality may deteriorate if the air condition-
er is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected in the air filter may block the
air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of purchase or for warranty
purposes. Write the model number and the serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
Here are some tips that will help you minimize the power consumption when you use the air
conditioner. You can use your air conditioner more efficiently by referring to the instructions
below:
TIPS FOR SAVING ENERGY
TIPS FOR SAVING ENERGY
2
ENGLISH

3
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE.
Always comply with the following precautions to avoid dangerous situations and ensure peak
performance of your product
WARNING
It can result in serious injury or death when the directions are ignored
CAUTION
It can result in minor injury or product damage when the directions are ignored
WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
• Installation MUST conform with local building codes or, in the absence of local codes, with
the Nation Electrical Code NFPA 70/ANSI C1-1003 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 mal-
function, property damage, personal injury and/or death.
Installation
• Don’t use a power cord, a plug or a loose socket which is damaged.
- Otherwise, it may cause a fire or electrical shock.
• For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center.
- Do not disassemble or repair the product. There is risk of fire or electric shock.
• Always ground the product.
- There is risk of fire or electric shock.
• Install the panel and the cover of control box securely.
- There is risk of fire or electric shock.
• Always install a dedicated circuit and breaker.
- Improper wiring or installation may cause fire or electric shock.
• Use the correctly rated breaker or fuse.
- There is risk of fire or electric shock.
• Do not modify or extend the power cable.
- There is risk of fire or electric shock.
• Do not let the air conditioner run for a long time when the humidity is very high and a door or a win-
dow is left open.
- Moisture may condense and wet or damage furniture.
• Be cautious when unpacking and installing the product.
- Sharp edges could cause injury. Be especially careful of the case edges and the fins on the con-
denser and evaporator.
• For installation, always contact the dealer or an Authorized Service Center.
- There is risk of fire, electric shock, explosion, or injury.
!
!
!
SAFETY PRECAUTIONS
ENGLISH

• Do not install the product on a defective installation stand.
- It may cause injury, accident, or damage to the product.
• Be sure the installation area does not deteriorate with age.
- If the base collapses, the air conditioner could fall with it, causing property damage, product failure,
and personal injury.
Operation
• Do not store or use flammable gas or combustibles near the product.
- There is risk of fire or failure of product.
CAUTION
Installation
• Always check for gas (refrigerant) leakage after installation or repair of product.
- Low refrigerant levels may cause failure of product.
• Install the drain hose to ensure that water is drained away properly.
- A bad connection may cause water leakage.
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• Do not install the product where the noise or hot air from the outdoor unit could damage the neigh-
borhoods.
- It may cause a problem for your neighbors.
• Use two or more people to lift and transport the product.
- Avoid personal injury.
• Do not install the product where it will be exposed to sea wind (salt spray) directly.
- It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator
fins, could cause product malfunction or inefficient operation.
!
SAFETY PRECAUTIONS
4
ENGLISH

5
2TIPS FOR SAVING
ENERGY
3IMPORTANT SAFETY
INSTRUCTIONS
6INSTALLATION PARTS
6INSTALLATION TOOLS
7INSTALLATION MAP
8INSTALLATION
8Select the best Location
8Outdoor unit
9Fixing Installation Plate
9Drill a Hole in the Wall
9Flaring Work
9- Cut the pipes and the cable
10 - Burrs removal
10 - Putting nut on
10 - Flaring work
10 - Check
10 - Installation of Indoor Unit
11 Connecting the Piping
11 - Good case
12 - Bad case
12 - Left side piping
12 - Right side piping
12 - Connecting the installation pipe and
drain hose to the indoor unit.
13 - Wrap the insulation material around
the connecting portion.
13 - Finishing the indoor unit installation
14 Outdoor
14 Connecting the Cables
16 Forming the Piping
17 Air Purging
17 - Air purging with vacuum pump
18 - Soap water method
18 - Evacuation
19 - Finishing the Job
19 - Settlement of outdoor unit
20 Checking the Drainage
20 - To check the drainage.
20 - Drain piping
21 Installation of filters
21 Test Running
21 - Prepare remote controller
22 - Evaluation of the performance
22 - Pump down
22 - Pump Down Procedure
23 Installation guide at the seaside
23 - Selecting the location(Outdoor Unit)
24 Piping Length and Elevation
TABLE OF CONTENTS
TABLE OF CONTENTS
ENGLISH

INSTALLATION TOOLS
6INSTALLATION PARTS
ENGLISH
INSTALLATION PARTS
Name Quantity Shape
Installation plate 1 EA
Type "A" screw
5 EA
Type "B" screw
2 EA
Type "C" screw
2 EA
Remote control
holder
1 EA
The feature can be changed according a type of model.
Screws for fixing panels are attached to decoration panel.
Figure FigureName
Screw driver
Electric drill
Measuring tape, Knife
Hole core drill
Spanner
Torque wrench
Multi-meter
Hexagonal wrench
Ammeter
Gas-leak detector
Thermometer,
Level
Flaring tool set
Name

INSTALLATION MAP 7
INSTALLATION MAP
Connecting cable
(Optional Parts)
Gas side piping (Optional Parts)
Liquid side piping (Optional Parts)
Additional drain pipe
Vinyl tape (Narrow)
Drain Hose
Vinyl tape (Wide)
• Apply after carrying out a
drainage test.
• To carry out the drainage
test, remove the air filters
and pour water into the heat
exchanger.
Saddle
Installation plate
Sleeve
Bushing-Sleeve
Putty(Gum Type Sealant)
Bend the pipe as closely
on the wall as possible,
but be careful that it
doesn't break.
NOTE
!
• You should purchase the installation parts.
* The feature can be changed according to a type of model.
ENGLISH

Select the best Location
- There should not be any heat or steam near
the unit.
- Select a place where there are no obstacles
around of the unit.
- Make sure that condensation drainage can
be conveniently routed away.
- Do not install near a doorway.
- Ensure that the interval between a wall and
the left (or right) of the unit is more than
100mm. The unit should be installed as high
as possible on the wall, allowing a minimum
of 200mm from ceiling.
- Use a metal detector to locate studs to pre-
vent unnecessary damage to the wall.
* The feature can be changed according a
type of model.
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 300mm. The space in
front of the unit should be more than 700mm
of space.
- Do not place animals and plants in the path
of the warm air.
- Take the weight of the air conditioner into ac-
count and select a place where noise and vi-
bration are minimum.
- Select a place where the warm air and noise
from the air conditioner do not disturb neigh-
bors.
More than 200
More than
100
More than 2300
More than
100
(Unit : mm)
CAUTION
Install the indoor unit on the wall where
the height from the floor is more than
2300mm.
!
INSTALLATION
INSTALLATION
8
ENGLISH
More than
300
More than
300
Sunroof
Fence or
obstacles
More than
700
More than
600
(Unit : mm)
*The feature can be changed according a type
of model.

Fixing Installation Plate
The wall you select should be strong and solid
enough to prevent vibration
1Mount 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 Horizontal
meter .
2Measure the wall and mark the centerline.
It is also important to use caution concern-
ing 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.
Drill a Hole in the Wall
- Drill the piping hole with a ø65mm hole core
drill. Drill the piping hole at either the right or
the left with the hole slightly slanted to the
outdoor side.
Flaring Work
Main cause for gas leakage is due to defect of
flaring work. Carry out correct flaring work in
the following procedure.
Cut the pipes and the cable
1Use the piping kit accessory or the pipes
purchased locally.
2Measure the distance between the indoor
and the outdoor unit.
3Cut the pipes a little longer than measured
distance.
4Cut the cable 1.5m longer than the pipe
length.
5-7mm
(3/16"~5/16")
Indoor
WALL
Outdoor
Copper
pipe
90°
Slanted Uneven Rough
Installation Plate
Chassis
Hook
Type "A" Screws
Ø65
Ø65
69
56
Right rear
piping
Left rear
piping
Installation Plate
Measuring Tape
Measuring Tape
Hanger
Place a level on raised tab
Unit Outline
207
105
(Unit : mm)
460 570
9
INSTALLATION
ENGLISH

Outside diameter A
Pipe
Reamer
Point down
Flare nut
Copper tube
mm inch mm
Ø6.35 1/4 1.1~1.3
Ø9.52 3/8 1.5~1.7
Ø12.7 1/2 1.6~1.8
Ø15.88 5/8 1.6~1.8
Ø19.05 3/4 1.9~2.1
Installation plate
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =
INSTALLATION
10
ENGLISH
Burrs removal
1. Completely remove all burrs from the cut
cross section of pipe/tube.
2. While removing burrs put the end of the
copper tube/pipe in a downward direction
while removing burrs location is also
changed in order to avoid dropping burrs
into the tubing.
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 finishing
flare work)
Flaring work
1Firmly hold copper pipe in a bar with the
dimension shown in table below.
2Carry out flaring work with the flaring tool.
Check
1Compare the flared work with the figure
by.
2If a flared section is defective, cut it off
and do flaring work again.
Installation of Indoor Unit
1Hook the indoor unit onto the upper por-
tion of the installation plate.( engage the
three hooks at the 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

2Unlock the tubing holder from the chassis
and mount between the chassis and instal-
lation plate in order to separate the bottom
side of the indoor unit from the wall.
* The feature can be changed according a
type of model.
Connecting the Piping
1Pull the screw cap at the bottom of the
indoor unit
2Remove the chassis cover from the unit by
loosing 3 screws (Be careful not to scratch
Horizontal Vane Main!)
3Pull back the tubing holder.
4Remove pipe port cover and positioning
the tubing
* The feature can be changed according a
type of model.
Good case
- Press on the tubing cover and unfold the
tubing to downward slowly. And then bend
to the left side slowly.
11
INSTALLATION
ENGLISH
Tubing holder
Pipe Port
Indoor unit back side view
Left
Backwards
Right
Chassis cover
Tubing Holder

Outside diameter Torque
mm inch kgf.m
Ø6.35 1/4 1.8~2.5
Ø9.52 3/8 3.4~4.2
Ø12.7 1/2 5.5~6.5
Ø15.88 5/8 6.3~8.2
Ø19.05 3/4 9.9~12.1
INSTALLATION
12
ENGLISH
Indoor unit tubing Flare nut Pipes
CAUTION
Installation Information. For right piping.
Follow the instruction above.
!
Drain hose
CAUTION
Method:
1Disassemble bracket (from indoor unit)
2Assemble it with conduit
3Reassemble it with indoor unit.
If the drain hose is routed inside the room
insulate the hose with an insulation mate-
rial* so that dripping from sweating (con-
densation) will not damage furniture or
floors.
* Foamed polyethylene or equivalent is
recommended.
!
Bad case
- Following bending case from right to left
directly may cause damage to the tubing.
* The feature can be changed according a
type of model.
Left side piping
Right side piping
Connecting the installation pipe
and drain hose to the indoor unit.
1Align the center of the pipes and sufficient-
ly tighten the flare nut by hand
2Tighten the flare nut with a wrench

Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
Insulation material
Vinyl tape(narrow)
Connection pipe
Connecting cable
Vinyl tape (wide) Wrap with vinyl tape
Indoor unit pipe
Pipe
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
Type 'C' screw
Wrench
Indoor unit tubing
Open-end wrench
(fixed)
Connection
pipe
Flare nut
13
INSTALLATION
ENGLISH
3. When needed to extend the drain hose of
indoor unit, assemble the drain pipe as
shown on the drawing
Wrap the insulation material
around the connecting portion.
1Overlap 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.
2Wrap the area which accommodates the
rear piping housing section with vinyl tape.
3Bundle the piping and drain hose together
by wrapping them with vinyl tape sufficient
enough to cover where they fit into the
rear piping housing section.
Finishing the indoor unit
installation
1Mount the tubing holder in the original
positon.
2Ensure that the hooks are properly seated
on the installation plate by moving it left
and right.
3Press the lower left and right sides of the
unit against the installation plate until the
hooks engage into their slots (clicking
sound).
4Finish the assembly by screwing the unit
to the installation plate by using two
pieces of type "C" screws. And assemble a
chassis cover.

14
ENGLISH
Connecting the Cables
Connect the cable to the indoor unit by con-
necting the wires to the terminals on the con-
trol 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.)
- 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.
Liquid side piping
(Smaller diameter)
Torque wrench
Gas side piping
(Bigger diameter)
Outdoor unit
Outside diameter Torque
mm inch kgf.m
Ø6.35 1/4 1.8~2.5
Ø9.52 3/8 3.4~4.2
Ø12.7 1/2 5.5~6.5
Ø15.88 5/8 6.3~8.2
Ø19.05 3/4 9.9~12.1
CAUTION
- The circuit diagram is a subject to
change without notice.
- The earth wire should be longer than the
common wires.
- When installing, refer to the circuit dia-
gram on the chassis cover.
- Connect the wires firmly so that they
may not be pulled out easily.
- Connect the wires according to color
codes, referring to the wiring diagram.
!
*The feature can be changed according a type
of model.
The power cord connected to the outdoor
unit should be complied with the follow-
ing specifications (UL recognized or CSA
certified).
10±3mm
20mm
GN/YL
AWG_“A”
CAUTION
!
Power Capacity(Btu/h)
18K/24k
"A" 12
(mm2)
INSTALLATION
Outdoor
- Remove the tubing cover from the unit by
loosening the screw.
- Align the center of the pipings and suffi-
ciently tighten the flare nut by hand.
Power supply cable

15
ENGLISH
Connecting
Cable
Capacity(Btu/h)
18k/24k
"B" 18
(mm2)
10±3mm
20mm
GN/YL
AWG_“B”
The power connecting cable connected to the
indoor and outdoor unit should be complied
with the following specifications (UL recog-
nized or CSA certified).
Outdoor unit
Terminal block
Over 5mm
(0.2")
Cover control
Conduit panel
Connecting
cable
Power supply
cord
- Connect the wires to the terminals on the
control board individually.
- Secure the cable onto the control board with
the cord clamp.
- Use a recognized circuit breaker between
the power source and the unit.
A disconnecting device to adequately discon-
nect all supply lines must be fitted.
Circuit Breaker(A)
Capacity(Btu/h)
18K/24k
25
*The feature can be changed according a type
of model.
Air
Conditioner
Main power source
Circuit Breaker
Use a circuit breake
or time delay fuse.
CAUTION
Provide the circuit breaker between
power source and the unit as shown by
!
INSTALLATION
Connecting cable

16
ENGLISH
CAUTION
According to the confirmation of the
above conditions, prepare the wiring as
follows.
1Never fail to have an individual power
circuit specifically for the air condi-
tioner. As for the method of wiring, be
guided by the circuit diagram posted
on the inside of control cover.
2The screw which fasten the wiring in
the casing of electrical fittings are li-
able 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.)
3Specification of power source.
4Confirm that electrical capacity is suffi-
cient.
5See that the starting voltage is main-
tained at more than 90 percent of the
rated voltage marked on the name
plate.
6Confirm that the cable thickness is as
specified in the power source specifi-
cation.
(Particularly note the relation between
cable length and thickness.
7Always install an earth leakage circuit
breaker in a wet or moist area.
8The following would be caused by volt-
age drop.
- Vibration of a magnetic switch, which
will damage the contact point, fuse
breaking, disturbance of the normal
function of the overload.
9The means for disconnection from a
power supply shall be incorporated in
the fixed wiring and have an air gap
contact separation of at least 3mm in
each active(phase) conductors.
!Forming the Piping
In cases where the outdoor unit is installed
below the indoor unit perform the following.
1Tape the piping, drain hose and connecting
cable from down to up.
2Secure the tapped piping along the exterior
wall using saddle or equivalent.
Taping
Drain hose
Pipings
Connecting cable
(Conduit)
Trap is required to prevent water
from entering into electrical parts.
Seal small openings
around pipings with a
gum type sealant.
*The feature can be changed according a type
of model.
INSTALLATION

17
ENGLISH
In cases where the Outdoor unit is installed
above the Indoor unit perform the following.
1Tape the piping and connecting cable from
down to up.
2Secure the taped piping along the exterior
wall. Form a trap to prevent water entering
the room.
3Fix the piping onto the wall using saddle or
equivalent
Seal a small opening
around the pipings
with gum type sealant.
Trap
Trap
*The feature can be changed according a type
of model.
- 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.
Air purging with vacuum pump
CAUTION
Be sure to use a manifold valve for air
purging. If it is not available, use a stop
valve for this purpose. The knob of the 3-
way valve must always be kept close.
- Pressurize the system to not more than
150 P.S.I.G. with dry nitrogen gas and
close the cylinder valve when the gauge
reading reaches 150 P.S.I.G. Next, test
for leaks with liquid soap.
!
CAUTION
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.
!
INSTALLATION
Air Purging
The air and moisture remaining in the refriger-
ant system have undesirable effects as indi-
cated 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, after evacuating the system, take a
leak test for the piping and tubing between
the indoor and outdoor unit.

18
ENGLISH
- 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 re-
duced to normal, disconnect the hose from
the cylinder.
*The feature can be changed according a type
of model.
- Remove the caps from the 2-way and 3-way
valves.
- Remove the service-port cap from the 3-way
valve.
- Apply a soap water or a liquid neutral deter-
gent on the indoor unit connection or out-
door unit connections by a soft brush to
check for leakage of the connecting points of
the piping.
- If bubbles come out, the pipes have leakage
- 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 pressure Gauge
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 knob of the 3-way valve and stop the
vacuum pump.
Evacuation
Outdoor unit
Lo Hi
Manifold valve
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
Pressure
gauge
Indoor unit
Outdoor unit
Gas side
Liquid side
Cap
3-way or
2-way valve
3-way valve
Required time for evacuation when 30 gal/h
vacuum pump is used
If tubing length is
less than 10m (33 ft)
If tubing length is
longer than 10m (33
ft)
10 min. or more 15 min. or more
Soap water method
*The feature can be changed according a type
of model.
INSTALLATION

19
ENGLISH
- With a service valve wrench, turn the valve of
liquid side counter-clockwise to fully open the
valve
- Turn the valve of gas side 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 se-
curely with an adjustable wrench. This process
is very important to prevent leakage from the
system.
Indoor unit
Outdoor unit
Lo Hi
Manifold valve
Vacuum pump
Pressure
gauge
Open Close
*The feature can be changed according a type
of model.
- Replace the valve caps at both gas and liquid
side service valves and fasten them tight.
This completes air purging with a vacuum pump.
- Replace the pipe cover to the outdoor unit by
one screw
Now the air conditioner is ready for test run.
* The feature can be changed according a type of
model.
- Fix the outdoor unit with a bolt and
nut(ø10mm) tightly and horizontally on a con-
crete 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.
- If the vibration of the unit is transmitted to
the pipe, secure the unit with an anti-vibra-
tion rubber.
Settlement of outdoor unit
Bolt
Tubing connection
INSTALLATION
Finishing the Job

20
ENGLISH
Checking the Drainage
To check the drainage.
1Pour a glass of water on the evaporator.
2Ensure the water flows through the drain
hose of the indoor unit without any leak-
age and goes out the drain exit.
* The feature can be changed according to the
type model.
Drain piping
1The drain hose should point downward for
easy drain flow.
2Do not make drain piping like the follow-
ing.
* The feature can be changed according a
type of model.
Connecting area
drain hose
Leakage
checking
Drain pan
Drain
hose
Leakage
checking
Downward slope
Do not raise
Water
leakage
Accumulated
drain water
Air
Waving
Water
leakage
Tip of drain hose
dipped in water
Water
leakage Ditch
Less than
50mm gap
INSTALLATION