LG Multi V 2 Series User manual

System
Indoor Unit (2 Series)
INSTALLATION MANUAL
LG
Type: Ceiling Concealed Duct - Low Static
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.
ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

2Indoor Unit
Ceiling Concealed Duct - Low Static Type Indoor Unit Installation Manual
TABLE OF CONTENTS
❏Four type "A" screws
❏Connecting cable
❏Pipes: Gas side
Liquid side
(Refer to Product Data)
❏Insulation materials
❏Additional drain pipe
❏Level gauge
❏Screw driver
❏Electric drill
❏Hole core drill
❏Flaring tool set
❏Specified torque wrenches
(different depending on model No.)
❏Spanner .......Half union
❏A glass of water
❏Screw driver
❏Hexagonal wrench
❏Gas-leak detector
❏Vacuum pump
❏Gauge manifold
❏Owner's manual
❏Thermometer
Safety Precautions.................3
Introduction.............................6
Installation
Selection of the best location
................................................7
Ceiling opening dimension
and hanging bolt location ......8
Indoor Unit Installation...........9
Wiring Connection .................9
Part name and functions .....10
Checking the Drainage........11
Installation of Wired
Remote Controller ...............15
Optional Operation of
Wired Remote Controller ....17
How to Set E.S.P? ................18
Installation Requirements Required Parts Required Tools

Installation Manual 3
ENGLISH
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be followed.
■Be sure to read before installing the air conditioner.
■Be sure to observe the cautions specified here as they include important items related to safety.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the
following indications.
■Meanings 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.
■Installation
Do not use a defective or under-
rated circuit breaker. Use this
appliance on a dedicated circuit.
• There is risk of fire or electric shock.
For electrical work, contact the
dealer, seller, a qualified electri-
cian, or an Authorized Service
Center.
• Do not disassemble or repair the
product. There is risk of fire or elec-
tric 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 cir-
cuit 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.

4Indoor Unit
Safety Precautions
■Operation
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.
For installation, always contact
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 condi-
tioner could fall with it, causing prop-
erty damage, product 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.
Gasolin

Installation Manual 5
ENGLISH
Safety Precautions
Always check for gas (refriger-
ant) 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 prop-
erly.
• 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 out-
door unit could damage 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 con-
denser and evaporator fins, could
cause product malfunction or inefficient
operation.
90˚
■Installation
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.

6Indoor Unit
Introduction
Introduction
Air outlet vents
Air filters
Wired Remote Controller
RemoteController
TEMP
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
Low static Duct type

Installation Manual 7
ENGLISH
Installation
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 unit’s weight.
• The place shall be able to inspect the unit as the figure.
• The place where the unit shall be leveled.
• The place shall easily connect with the outdoor unit.
• The place where the unit is not affected by an 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
Confirm the positional relationship between the unit and
suspension bolts.
• Installation the ceiling opening to clean the filter or service
under the product.
Selection of the best location
Inspection hole
(600 x 600)
Control box
H=20 or more
•Suitable dimension "H" is necessary to get a slooe
to drain as aiven in the fiaure
Side view (unit: mm)
600600
A(Min) B(Min)
Ceiling
Service Space
A
B
Capacity(Btu/h) A B
7/9/12/15k 600 900
18/24k 600 1100
(Length: mm)
Low static Duct type

8Indoor Unit8Indoor Unit
Installation
Ceiling dimension and hanging bolt location
Installation of Unit
Install the unit above the ceiling correctly.
• Apply a joint-canvas between the unit and duct to absorb
unnecessary vibration.
• Apply a filter Accessory at air return hole.
• Install the unit leaning to a drainage hole side as a figure
for easy water drainage.
• A place where the unit will be leveled and that can support
the weight of the unit.
• A place where the unit can withstand its vibration.
• A place where service can be easily performed.
CASE 1
POSITION OF SUSPENSION BOLT
(Unit:mm)
7/9/12/15k BTU/h 850 900 383 575 93 190 21 795 163 820
18/24k BTU/h 1130 1180 383 575 93 190 21 1065 163 1100
Dimension
Capacity(Btu/h)
ABCDEFGH I J
CE
G
D
A
J
B
M10 Nut
M10 SP. washer
M10 washer
X 4
X 4 (Local
supply)
X 4
M10 Nut
M10 SP. washer
M10 washer
X 4
X 4 (Local
supply)
X 4
I
F
H
Drainage hole Drain Pump use
CASE 2
POSITION OF CONSOLE BOLT

Installation Manual 9
ENGLISH
Installation
• Select and mark the position for fixing bolts.
• Drill the hole for set anchor on the face of ceiling.
• Insert the set anchor and washer onto the suspen-
sion bolts for locking the suspension bolts on the
ceiling.
• Mount the suspension bolts to the set anchor firmly.
• Secure the installation plates onto the suspension
bolts (adjust level roughly) using nuts, washers
and spring washers.
1 Set anchor
Old building New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
bolts
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 Indoor
1(L) 2(N) 3 4
INDOOR POWER INPUT
IDU IDU
Outdoor unit Indoor unit
Central controller
SODU SODU
DRY1 DRY2 GND INTERNET 12V
Outdoor unit
Wiring Connection
Indoor Unit Installation
CAUTION : Tighten the nut and bolt
to prevent unit falling.
WARNING : Make sure that the screws of the terminal are free from looseness.
B1/B2 Series

10 Indoor Unit10 Indoor Unit
Installation
• Low static duct type in case of suction from back
side.
• Low static duct type in case of suction from bottom
side.
Air Filter
Air outlet Panel Rear Air outlet Air Filter
Panel Rear
Part name and functions

Installation Manual 11
ENGLISH
Installation
1. Remove the Air Filter.
2. Check the drainage.
• Spray one or two glasses of water upon the
evaporator.
• Ensure that water flows drain hose of indoor
unit without any leakage.
Checking the Drainage
INSULATION, OTHERS
Insulate the joint and tubes completely.
All thermal insulation must comply with local requirement.
INDOOR UNIT
■After all workings are finished, check the working and operation.
• Air distribution ............... Is the air circulation good?
• Drain ............................. Is the drainage smoothly and no sweating?
• Gas leakage ................. Is the piping connection correctly?
• Wiring ........................... Is the wiring connection correctly?
• Lock-bolt ....................... Is the lock-bolt of compressor loosened?
• Insulation Is the unit fully insulated?
• Ground Is the unit safely grounded?
THERMAL INSULATION
TEST AND CHECK
Make sure that there is no clearance here.
Overlap with thermal
insulator for piping.
Thermal insulator for refrigerant pipe
(Local supply) Thermal insulator for
piping(Local supply)
Hose clip for thermal insulator(Local supply)
Union for gas pipe
Refrigerant pipe and thermal
insulator(Local supply)
Union for liquid pipe
Thermal insulator for refrigerant pipe
(Local supply)
Hose clip for thermal insulator
(Local supply)
Felt
Rubber
Insulation
No clearance
Cabinet
.......................
.
........................

12 Indoor Unit12 Indoor Unit
Installation
CAUTION
Ceiling
Drain Pump use
Drainage hole
Front of view
1. Install declination of the indoor unit is very important for the drain of the duct type air conditioner.
2. Minimum thickness of the insulation for the connecting pipe shall be 19mm.
• The unit must be horizontal or declined to the drain hose connected when finished
installation.
• Drain piping must have down-slope (1/50 to 1/100): be sure not to
provide up-and-down slope to prevent reversal flow.
• During drain piping connection, be careful not to exert extra force
on the drain port on the indoor unit.
• The outside diameter of the drain connection on the indoor unit is
32mm.
• Be sure to install heat insulation on the drain piping.
Piping material: Polyvinyl chloride pipe VP-25 and
pipe fittings
The air conditioner uses a drain pump to drain water.
Use the following procedure to test the drain pump operation:
• Connect the main drain pipe to the exterior
and leave it provisionally until the test
comes to an end.
• Feed water to the flexible drain hose and
check the piping for leakage.
• Be sure to check the drain pump for normal
operating and noise when electrical wiring
is complete.
• When the test is complete, connect the
flexible drain hose to the drain port on the
indoor unit.
Heat insulation material: Polyethylene foam with thick-
ness more than 8 mm.
Drain test
Upward
routing
not allowed
Pipe clamp
1/50~1/100
MAX 700mm
Flexible drain hose
Maintenance
drain port
Indoor unit
Feed water
Drain Pump
Drain pan
Flexible drain hose
Main
drain pipe
Glue the joint
Drain
port
Drain hose connection
Use the clip
Flexible drain hose
Drain Piping

Installation Manual 13
ENGLISH
Installation
CAUTION:
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method of
wiring, be guided by the circuit diagram posted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) 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. (If they are loose, it could give rise to burn-out
of the wires.)
4) Specification of power source
5) Confirm that electrical capacity is sufficient.
6) Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage
marked on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) The following troubles would be caused by voltage drop-down.
• Vibration of a magnetic switch, damage on the contact point, fuse breaking, disturbance by the nor-
mal function of an overload protection device.
• Proper starting power is not given to the compressor.
HAND OVER
Teach the customer the operation and maintenance procedures, using the operation manual.
(air filter cleaning, temperature control, etc.)
1/50~1/100
MAX 700mm
Flexible drain hoseFlexible drain hose
CAUTION : The supplied flexible drain
hose should not be curved, neither
screwed. The curved or screwed hose
may cause a leakage of water.

14 Indoor Unit
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.)
RemoteController
TEMP
5feet
(1.5meters)
no
no
no
yes
RemoteController
TEMP
RemoteController
TEMP
Fig.1 Typical locations for remote controller
14 Indoor Unit
Installation

Installation Manual 15
ENGLISH
Installation
Installation of Wired Remote Controller
1. Connect the wired remote controller cable
to the wired remote controller installation
board as shown in the right picture.
2. After fixing the cable to the guide slot,
attach the wired remote controller installa-
tion board at the desired location.
• Before fixing the wired remote controller cable
to the guide slot, remove any clogged part of
the case in the direction to install before the
installation.
3. After locating the wired remote controller
installation board at the desired location,
screw the unit firmly. (When there is a
buried box, install the wired remote con-
troller board to fit the buried box.)
• Use the screw provided.
4. After fixing the top part of the wired
remote controller to the installation
board as shown in beside picture, press
the bottom part to assemble the con-
troller to it’s board.
When disassemble the wired remote controller
from the installation board, use the driver as
shown in the right picture and insert it into the
hole with the arrow. And when you pull the driver
in the front direction, the wired remote controller
will be separated.
12V Red wire
SIG Yellow wire
GND Black wire
❊The wired remote controller cable is connected as factory default.
12V SIG GND
Red
Yellow
Black
Remote Controller
Cable
Guide slot
Fixate the remote
controller cable
to the guide slot.
Use the screws
for fixate the unit
firmly on the wall.
Installation board
<Front side of
installation board>
<Rear side of
installation board>
Top
Bottom
Wall
Side
Wall
Side
Wall
Side
Wall
Side
Wall
Side

16 Indoor Unit16 Indoor Unit
Installation
5. Use the connecting cable to connect the indoor unit and the wired remote controller.
6. When the distance between the wired remote controller and the indoor unit is 10m and
above, use the extension cable.
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.
Check whether the connector
is connected correctly.
Connecting cable
Indoor
unit side

Installation Manual 17
Installation
ENGLISH
Function Code
04:01
Thermistor setting
1. Press button for 4 seconds to
enter the installer setting mode until
timer segment display “01:01”.
2. Repeat pressing button to select Function code 04.
3. Set Thermistor mode by pressing
button
(01: Remote Controller,
02: Indoor, 03: 2TH)
4. Press button to save or release
5. Press button to exit or system
will automatically exit after 25 seconds
without any input.
❈Therefore system will use value that sensed from indoor unit or remote controller
❈If you want to know more Optional Operation, please refer to Wired Remote Controller Manual.
Temperature sensor location Function
01 Remote controller Operation in remote controller Temperature sensor
02 Indoor unit Operation in indoor unit temperature sensor
03 2-Thermistor Operation in lower temperature after comparing the temperature
between the indoor unit and remote controller
Two Thermistor System
Optional Operation of Wired Remote Controller

18 Indoor Unit
How to Set E.S.P?
18 Indoor Unit18 Indoor Unit
How to Set E.S.P?
Function Code
03:00:155
ESP valueESP step
If you set ESP incorrectly, the air conditioner may malfunction.
This setting must be carried out by a certificated-technician.
This function is using for only Duct product
What is an E.S.P function?
This is the function that decides the strength of the wind for each wind level and because this function is
to make the installation easier, please do not use this function when using the remote controller.
1. Press button for 4 seconds to
enter the installer setting mode until
timer segment display "01:01".
2. Repeat pressing Function Setting key to select
Function code 03.
3. Set ESP step by pressing
button (01: very low,
02: low, 03: medium, 04: high.
05: power).
4. Move to ESP setting by
pressing button.
5. Press button to select
ESP value(0~255).
6. Press button to save or release
7. Press button to exit or the
system will automatically exit after
25 seconds without any input
❊Weak and Power setting is not available for some products.
❊Because the ESP value is already appropriately set when manufactured from the factory, it is recommended
that you do not change the ESP value.

Installation Manual 19
ENGLISH
How to Set E.S.P?
Note :
1. The above table shows the correlation between the air rates and E.S.P.
Setting Value
60 6.02 2.25 0.61 - -
65 6.95 3.32 0.73 0.54 0.48
70 7.69 5.16 1.19 0.65 0.56
75 8.46 6.93 2.42 0.77 0.63
80 9.5 7.37 3.4 0.87 0.72
85 10.35 8.72 5.33 1.35 0.88
90 10.81 9.66 6.75 3.15 0.98
95 11.57 10.31 8.56 4.73 1.03
100 12.58 11.22 9.75 7.46 2.31
105 13.31 12.27 10.89 8.64 5.01
110 14.2 13.24 12.15 10.49 7.7
115 14.82 13.92 12.64 11.16 9.48
0(0) 1(10) 2(20) 3(30) 4(40)
Static Pressure(mmAq(Pa))
Setting Value
65 10.07 6.9 0.82 - -
70 11.39 8.49 2.2 - -
75 12.01 9.79 4.2 - -
80 13.21 11.03 5.92 0.92 -
85 14.24 12.36 9.41 2.1 -
90 15.04 13.34 10.8 5.29 1.01
95 16.02 14.63 12.5 7.59 1.34
100 17.11 15.56 13.66 11.53 5.35
105 17.99 16.53 15.17 12.35 7.67
110 19.04 17.71 16.22 14.23 10.45
115 19.77 18.62 17.1 15.23 13.25
120 20.94 19.92 18.56 16.98 14.66
125 21.97 20.56 19.25 17.68 16.06
130 22.83 21.98 20.75 19.32 17.73
0(0) 1(10) 2(20) 3(30) 4(40)
Static Pressure(mmAq(Pa))
ARNU07GB1G2, ARNU09GB1G2, ARNU12GB1G2, ARNU15GB1G2
ARNU18GB2G2, ARNU24GB2G2
(Unit: CMM)
(Unit: CMM)

20 Indoor Unit20 Indoor Unit20 Indoor Unit
Memo