LG MFL67656101 User manual

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.
www.lg.com
TYPE : Floor Standing
P/NO : MFL67656101

2Indoor Unit
Floor Standing Type Indoor Unit Installation Manual
TABLE OF CONTENTS
oFour type "A" screws
oConnecting cable
oPipes: Gas side
Liquid side
(Refer to Product Data)
oInsulation materials
oAdditional drain pipe
oLevel gauge
oScrew driver
oElectric drill
oHole core drill
oFlaring tool set
oSpecified torque wrenches
(different depending on model No.)
oSpanner .......Half union
oA glass of water
oScrew driver
oHexagonal wrench
oGas-leak detector
oVacuum pump
oGauge manifold
oOwner's manual
oThermometer
Safety Precautions.................3
Introduction .............................5
Installation
Selection the best location ....6
Preparation of Piping .............8
How to connect wirings........11
Wiring Connection ...............12
Installation of Wired
Remote Controller ...............14
Name and function of wired
remote controller(Accessory)
...16
Installation Requirements Required Parts Required Tools

Installation Manual 3
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
nBe sure to read before installing the air conditioner.
nBe sure to observe the cautions specified here as they include important items related to safety.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the
following indications.
nMeanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
nInstallation
Do not use a defective or
underrated circuit breaker.
Use this appliance on a dedi-
cated circuit.
• There is risk of fire or elec-
tric 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 elec-
tric 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 break-
er 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 window 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 condenser and evaporator.

4Indoor Unit
Always check for gas (refrig-
erant) leakage after installa-
tion 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 dam-
age the neighborhoods.
• 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 mal-
function or inefficient operation.
nInstallation
Safety Precautions
nOperation
For installation, always con-
tact the dealer or an
Authorized Service Center.
• There is risk of fire, electric
shock, explosion, or injury.
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, prod-
uct failure, and personal injury.
Do not store or use flammable gas or combustibles near the product.
• There is risk of fire or failure of product.
Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress
air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explosion.
• There is the risk of death, injury, fire or explosion.
If you eat the liquid from the
batteries, brush your teeth and
see doctor. Do not use the
remote if the batteries have
leaked.
• The chemicals in batteries
could cause burns or other
health hazards.

Installation Manual 5
Introduction
Introduction
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Symbols Used in this Manual
Features
Air Outlet
Control Panel
Air Filter
Air Inlet
Control Box
Base

Installation
Selection of the best location
6Indoor Unit
Installation
Indoor unit
Install the air conditioner in the location that satisfies the fol-
lowing conditions.
• The place shall easily bear a load exceeding four times the
indoor unitʼs weight.
• Sufficient space should be available to inspect the unit as in
the figure shown on the right.
• The place where the unit is installed shall be leveled.
• The place shall be suitable for easy connection of the indoor
unit with the outdoor unit.
• The place where the unit is installed should not be affected
by electrical noise.
• The place where air circulation in the room will be good .
• There should not be any heat source or steam near the unit
Service space
Select an installation site where the following conditions are
satisfied and that meets your customer's approval.
• Where the floor is strong enough to bear the indoor unit
weight.
• Where the floor is not significantly inclined.
• Where nothing blocks the air passage.
• Where condensate can be properly drained.
• Where sufficient clearance for installation and maintenance
can be ensured.
• Where there is no possibility of flammable gas leakage.
• Where optimum air distribution can be ensured.
• Where piping between indoor and outdoor units is possible
within the allowable limit (Refer to the installation manual of
the outdoor unit.)
• Keep the indoor and outdoor unit, power cable and transmis-
sion wiring, at least 1m from TVs and radios, to prevent dis-
torted pictures and static.(Depending on the type and source
of the electrical waves, static may be heard even when more
than 1 m away.)
50mm
50mm
400mm
1000mm

Installation Manual 7
Installation
200mm
70mm 70mm
90mm
Wall
Core Drill
INSIDE OUTSIDE
Tilt
Cut if necessary
More than 15mm
Wall
Plastic tube
(Bushing)
INSIDE OUTSIDE
1. The mounting floor should be strong and solid enough to prevent it from vibration.
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.
3. Insert the plastic tube through the hole.
4. Cut the extruded outside part of the plastic tube, if necessary.

8Indoor Unit
Installation
Preparation of Piping
1. Cut the pipes and the cable.
nUse the accessory piping kit or the pipes purchased
locally.
nMeasure the distance between the indoor and the out-
door unit.
nCut the pipes a little longer than measured distance.
nCut the cable 1.5m longer than the pipe length.
2. Burrs removal
nCompletely remove all burrs from the cut cross section
of pipe/tube.
nPut the end of the copper tube/pipe to downward direc-
tion as you remove burrs in order to avoid to let burrs
drop in the tubing.
3. Flaring work
nCarry out flaring work using flaring tool as shown below.
Firmly hold copper tube in a bar(or die) as indicated
dimension in the table above.
4. Check
nCompare the flared work with figure below.
nIf flare is noted to be defective, cut off the flared section
and do flaring work again.
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
Pipe " A "
Gas(mm) Liquid(mm) Gas(mm) Liquid(mm)
<5.6(19,100) 12.7 6.35 0.5~0.8 0~0.5
<16.0(54,600) 15.88 9.52 0.8~1.0 0.5~0.8
<22.4(76,400) 19.05 9.52 1.0~1.3 0.5~0.8
Indoor unit
[kW(Btu/h]
Copper
tube
90 Slanted Uneven Rough
Pipe
Reamer
Point down
Bar
Copper pipe
Clamp handle Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =

Installation Manual 9
Installation
1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.
2. Turn it until the shaft stops.
Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a
backseat type. Always use the special tool.
3. Make sure to tighten the cap securely.
1. Remove the cap and turn the valve clockwise with the hexagon wrench.
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
* For the tightening torque, refer to the table on the below.
Precautions when connecting pipes
• See the following table for flare part machining dimensions.
• When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three
or four times at first. (Use ester oil or ether oil.)
• See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)
• After all the piping has been connected, use nitrogen to perform a gas leak check.
CAUTION
• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are
present.
• When loosening a flare nut, always use two wrenches in
combination, When connecting the piping, always use a spanner
and torque wrench in combination to tighten the flare nut.
• When connecting a flare nut, coat the flare(inner and outer faces)
with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as
the initial tightening.
Opening shutoff valve
Closing shutoff valve
FLARE SHAPE and FLARE NUT TIGHTENING TORQUE
90 2
45
2
A
R=0.4~0.8
Pipe size Torque(kgf.m) A(mm) flare shape
Ø6.35 1.8~2.5 8.7~9.1
Ø9.52 3.4~4.2 12.8-13.2
Ø12.7 5.5~6.6 16.2-16.6
Ø15.88 6.3~8.2 19.3-19.7
Union
Tightening torque
Shutoff valve
size
Tightening torque N·m(Turn clockwise to close)
Shaft(valve body) Cap(Valve lid) Service port Flare nut Gas line piping attached to unit
Ø6.35 6±0.6 Hexagonal
wrench 4mm
29.4±2.9
12.7±2
16±2
-
Ø9.52 38±4
Ø12.7 9±0.9
53.9±5.8
55±6
Ø15.88 15±1.5 Hexagonal
wrench 6mm 75±7
Ø22.2 30±3 Hexagonal
wrench 10mm -25±3
Ø25.4

1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C).
2. Precautions in high humidity circumstance:
This air conditioner has been tested according to the "ISO
Conditions with Mist" and confirmed that there is not any
default. However, if it is operated for a long time in high
humid atmosphere (dew point temperature: more than
23°C), water drops are liable to fall. In this case, add heat
insulation material according to the following procedure:
• Heat insulation material to be prepared... EPDM (Ethylene
Propylene Diene Methylene)-over 120°C
the heat-resistance temperature.
• Add the insulation over 10mm thickness at high humidity
environment.
After inspecting pipe joints for gas leakage, be sure to insulate
wit the accessory joint insulation for fitting while referrig to the
figure. (Fasten both ends with clamps)
10 Indoor Unit
Installation
Indoor unit
Thermal insulator
(accessory)
Fastening band
(accessory)
Insulation for fitting
(accessory)
(For liquid piped)
Insulation for fitting
(accessory)
(For gas piped)
liquid pipe
Refrigerant piping
Clamp (6)
(4 accessory)
HEAT INSULATION
hThe amount of additional refrigerant : 0.59kg

Installation Manual 11
Installation
Remocon Wire
Communication Wire
Power Wire
How to connect wirings
• In order to protect cable, it should be inserted “Bushing Rubber”.
• The inside and outside connecting cable can be connected after opening the inlet grille.

12 Indoor Unit
Installation
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.
Terminal Block IDU
1(L) 2(N) 3 4
POWER INPUT
--
SODU IDU INTERNET DRY1 DRY2
BA BA
----
GND 12V
Outdoor
unit
Wiring Connection
CAUTION:
After 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) In a wet or moist area, always install an earth leakage circuit breaker.
8) The following would be caused by voltage drop.
• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the normal
function of the overload.
9) The means for disconnection from a power supply shall be incorporated in the fixed wiring and have
an air gap contact separation of at least 3mm in each active(phase) conductors.
WARNING : Make sure that the screws of the terminal are free from looseness.
CAUTION : The Power cord connected to the unit should be selected according
to the following specifications.

Installation Manual 13
Installation
WIERED REMOTE CONTROLLER INSTALLATION
• Since the room temperature sensor is in the remote controller, the remote controller box should be installed in a place
away from direct sunlight, high humidity and direct supply of cold air to maintain proper space temperature.
Install the remote controller about 5ft(1.5m) above the floor in an area with good air circulation at an average tempera-
ture.
Do not install the remote controller where it can be affected by:
- Drafts, or dead spots behind doors and in corners.
- Hot or cold air from ducts.
- Radiant heat from sun or appliances.
- Concealed pipes and chimneys.
- Uncontrolled areas such as an outside wall behind the remote controller.
- This remote controller is equipped with a seven segment LED. display. For proper display of the remote controller
LED's, the remote controller should be installed properly as shown in Fig.1.
(The standard height is 1.2~1.5 m from floor level.)
5feet
(1.5meters)
no
no
no
yes
RemoteController
TEMP
RemoteController
TEMP
RemoteController
TEMP

14 Indoor Unit
Installation
Installation of Wired Remote Controller
22
1
3
3
<Wire guide grooves<
1. Please fix tightly using provided screw after placing remote controller setup board on the place where
you like to setup.
- Please set it up not to bend because poor setup could take place if setup board bends.
Please set up remote controller board fit to the reclamation box if there is a reclamation box.
2. Can set up Wired remote controller cable into three directions.
- Setup direction: the surface of wall reclamation, upper, right
- If setting up remote controller cable into upper and right side, please set up after removing remote controller
cable guide groove.
h Remove guide groove with long nose.
①
Reclamation to the surface of the wall
②
Upper part guide groove
③
Right part guide groove
Wall
Side
Wall
Side
Wall
Side
Wall
Side
<Connecting order>
<Separating order>
3. Please fix remote controller upper part into the
setup board attached to the surface of the wall, as
the picture below, and then, connect with setup
board by pressing lower part.
- Please connect not to make a gap at the remote con-
troller and setup boardʼs upper and lower, right and left
part.
When separating remote controller from setup
board, as the picture below, after inserting into the
lower separating hole using screw driver and then,
spinning clockwise, remote controller is separated.
- There are two separating holes. Please individually
separate one at a time.
- Please be careful not to damage the inside
components when separating.

Installation Manual 15
Installation
4. Please connect indoor unit and remote controller using connection cable.
5. Please use extension cable if the distance between wired remote controller and indoor unit is more
than 10m.
Please check if connector is normally connected.
Connecting cable
Indoor
Unit side
When installing the wired remote controller, do not bury it in the wall.
(It can cause damage in the temperature sensor.)
Do not install the cable to be 50m or above.
(It can cause communication error.)
• When installing the extension cable, check the connecting direction of the connector of the
remote controller side and the product side for correct installation.
• If you install the extension cable in the opposite direction, the connector will not be connected.
• Specification of extension cable: 2547 1007 22# 2 core 3 shield 5 or above.

16 Indoor Unit
Installation
1
4
5
7
11
10
9
82
3
6
13
12
Please attach the inform label inside of the door.
Please choose proper language depend on your
country.
14
15
Name and function of wired remote controller(Accessory)
※ Some functions may not be operated and displayed depending on the product type.
※ It will display strange value to the room temperature if wired remote controller is not connected.
Model : PQRCVSL0 (Black Color)
PQRCVSL0QW (White Color)
1. Operation indication screen
2. Set temperature button
•
It will set not room temperature but outlet air temperature.
3. Fan speed button
•
Fan Speed have 3 Steps(Low, High and Super High)
4. ON/OFF button
5. Operation mode selection button
6. Wireless remote controller receiver
• Some products don't receive the wireless signals.
7. Air flow button
8. Subfunction button
9. Function setting button
10. Ventilation button
11. Reservation
12. Up,down,left,right button
13. Room temperature button
• Displays only the room temperature of the remote
controller perception.
• There is no control of room temperature.
14. Setting/Cancel button
15. Exit button