LG ARNU96GPFA4 User manual

INSTALLATION MANUAL
Floor standing
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
Copyright © 2018 LG Electronics Inc. All Rights Reserved.
MFL67142711
Rev.00_101118
ENGLISH
ESPAÑOL PORTUGUÊS

2TIPS FOR SAVING ENERGY
ENGLISH
• 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 and 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.
• 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

3
IMPORTANT SAFETY INSTRUCTIONS
ENGLISH
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 by unqualified persons can result in hazards to you and others.
• 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.
Installation
• Always perform grounding.
- Otherwise, it may cause electric shock.
• Don’t use an electric cable or a terminal block which is damaged.
- Otherwise, it may cause a fire or electric shock.
• For installation of the product, always contact the service center or a professional installation
agency.
- Otherwise, it may cause a fire, electric shock, explosion or injury.
• Securely attach the electrical part cover to the indoor unit and the service panel to the outdoor
unit.
- If the electrical part cover of the 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.
• Always install an air leakage breaker and a dedicated switching board.
- No installation may cause a fire and electric shock.
• Do not keep or use flammable gases or combustibles near the air conditioner.
- Otherwise, it may cause a fire or the failure of product.
• Ensure that an installation frame of the outdoor unit is not damaged due to use for a long
time.
- It may cause injury or an accident.
• Do not disassemble or repair the product randomly.
- It will cause a fire or electric shock.
!
!
!

• Do not install the product at a place that there is concern of falling down.
- Otherwise, it may result in personal injury.
• Use caution when unpacking and installing.
- Sharp edges may cause injury.
• Do not turn on the breaker or power under condition that front panel, cabinet, top cover,
control box cover are removed or opened.
- Otherwise, it may cause fire, electric shock, explosion or death.
• For installation of the product, do not use the pipe less than 5m.
- Otherwise, it may cause damage of compressor and to form dewdrop on the indoor unit.
- Also, it may cause to decrease capacity.
• Before accessing the terminals, all power circuits must be disconnected.
- It may cause injury or an accident.
Operation
• Do not share the outlet with other appliances.
- It will cause an electric shock or a fire due to heat generation.
• Do not use the damaged electric cable.
- Otherwise, it may cause a fire or electric shock.
• Do not modify or extend the electric cable randomly.
- Otherwise, it may cause a fire or electric shock.
• Turn off the breaker or power if strange sounds, smell, or smoke comes from it.
- Otherwise, it may cause electric shock or a fire.
• Keep the flames away.
- Otherwise, it may cause a fire.
• Do not use the electric cable near the heating tools.
- Otherwise, it may cause a fire and electric shock.
• Do not open the suction inlet of the indoor/outdoor unit during operation.
- Otherwise, it may electric shock and failure.
• Do not allow water to run into electrical parts.
- Otherwise, it may cause the failure of machine or electric shock.
• Hold the plug by the head when taking it out.
- It may cause electric shock and damage.
• Never touch the metal parts of the unit when removing the filter.
- They are sharp and may cause injury.
• Do not step on the indoor/outdoor unit and do not put anything on it.
- It may cause an injury through dropping of the unit or falling down.
• Do not place a heavy object on the electric cable.
- Otherwise, it may cause a fire or electric shock.
• When the product is submerged into water, always contact the service center.
- Otherwise, it may cause a fire or electric shock.
IMPORTANT SAFETY INSTRUCTIONS
4
ENGLISH

IMPORTANT SAFETY INSTRUCTIONS 5
• Take care so that children may not step on the outdoor unit.
- Otherwise, children may be seriously injured due to falling down.
CAUTION
Installation
• Install the drain hose to ensure that drain can be securely done.
- Otherwise, it may cause water leakage.
• 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 dispute with the neighbors.
• Always inspect gas leakage after the installation and repair of product.
- Otherwise, it may cause the failure of product.
• Keep level parallel in installing the product.
- Otherwise, it may cause vibration or water leakage.
• Means for disconnection must be incorporated in the fixed wiring in accordance with the
wiring rules.
Operation
• Avoid excessive cooling and perform ventilation sometimes.
- Otherwise, it may do harm to your health.
• Use a soft cloth to clean. Do not use wax, thinner, or a strong detergent.
- 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.
- Otherwise, it may damage your properties.
• Do not place obstacles around the flow inlet or outlet.
- Otherwise, it may cause the failure of appliance or an accident.
!
ENGLISH

6TABLE OF CONTENTS
ENGLISH
2TIPS FOR SAVING ENERGY
3IMPORTANT SAFETY INSTRUCTIONS
7INSTALLATION PLACE
7Select the best Location
8WIRING CONNECTION
8Connecting the cable
9Wiring Connection
11 CONNECTING PIPES
11 Preparation of Pipe
13 INSTALLATION
13 Indoor unit installation
14 Indoor Unit Drain Piping
14 DIP Switch Setting
15 Group Control Setting
19 Model Designation
19 Airborne Noise Emission
19 Limiting concentration
TABLE OF CONTENTS

INSTALLATION PLACE 7
ENGLISH
Select the best Location
- 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.
- 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.
INSTALLATION PLACE
50 mm 50 mm
1 000 mm
400 mm
300 mm 300 mm
300 mm
• It’s not possible to apply the duct indoor unit to this model.
• Do not disassemble, repair, or modify the product to install the
duct. (This may cause performance degradation and burnout.)
CAUTION
!
Duct
<PT3> <PF2>

8WIRING CONNECTION
ENGLISH
Connecting the cable
* The inside and outside connecting cable can be connected after opening the inlet grille.
1Open the inlet grille manually.
2Open the control cover with screwdriver(⊕).
3Secure the control cover to the original position with the screw.
4Close the inlet grille.
WIRING CONNECTION
Remote Control Wire
Power Wire
Communication Wire
<PT3> <PF2>

WIRING CONNECTION 9
ENGLISH
Terminal block
of indoor unit (2)
Communication Line(IDU-ODU)
Power Supply
Indoor Unit
Terminal block of outdoor unit
3(A) 4(B)
Terminal block
of indoor unit (1)
1(L) 2(N)
<PF2>
IDU IDU
Outdoor unit Indoor unit
Central controller
SODU SODU
DRY1 DRY2 GND
INTERNET 12V
Terminal block
of indoor unit (2)
Communication Line(IDU-ODU)
Power Supply
Indoor Unit
Terminal block of outdoor unit
3(A) 4(B)
Terminal block
of indoor unit (1)
1(L) 2(N)
<PT3>
IDU IDU
Outdoor unit Indoor unit
Central controller
SODU SODU
DRY1 DRY2 GND
INTERNET 12V
Wiring Connection
- 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.
※Resistance measurement position for incorrect wiring.
Make sure that the screws of the terminal are free from looseness.
Use O-Ring or Y-Ring when connecting Power cable and
Connecting cable.
The connecting cable connected to the indoor and outdoor unit should be complied with the
following specifications (Rubber insulation, type H05RN-F approved by HAR or SAA).
(This equipment shall be provided with a cable set complying with the national regulation).
NORMAL CROSS-SECTIONAL AREA 1.5 mm2
If the supply cord is damaged, it must be replaced by a special cord or assembly available
from the manufacturer of its service agent. When the connection line between the indoor
unit and outdooor unit and outdoor unit is over 40 m, connect the telecommunication line
and power line separately.
WARNING
!
WARNING
!
CAUTION
!

10 WIRING CONNECTION
ENGLISH
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have separate power specially for the air conditioner. As for the method of
wiring, follow the circuit diagram pasted on the inside of control box cover.
2) Provide a circuit breaker switch between power source and the unit.
3) 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 give rise to
burn-out of the wires.)
4) Confirm the 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) Do not install the leakage breaker in a place which is wet or moist.
Water or moist may cause short circuit.
9) 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.
- Proper starting power is not given to the compressor.
10) Before applying power to the indoor unit, be sure to check for incorrect wiring of the power
and communication lines.
Be sure to test the power line and communication line for incorrect wiring before power is
applied.
1) If the power line and communication line are swapped over, the product will be damaged.
2) Incorrect wiring confirmation test method
: Measure the resistance across the power terminals (L,N) using a multi meter.
- Resistance value of a normal connection: 1 MΩ or more
- Incorrect wiring resistance value: 500 MΩ or less
The Power cord connected to the unit should be selected according to the following
specifications.
CAUTION
!
CAUTION
!
CAUTION
!

CONNECTING PIPES 11
ENGLISH
Preparation of Pipe
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
Cut the pipes and the cable.
- Use the accessory pipe kit or the pipes
purchased locally.
- Measure the distance between the indoor
and the outdoor unit.
- Cut the pipes a longer than measured
distance.
- Cut the cable 1.5 m longer than the pipe
length.
Burrs removal
- Completely remove all burrs from the cut
cross section of pipe.
- Put the end of the copper pipe to downward
direction as you remove burrs in order to
avoid to let burrs drop in the pipe.
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 below table.
2Carry out flaring work with the flaring tool.
Copper
tube 90° Slanted Uneven Rough
Pipe
Reamer
Point down
CONNECTING PIPES
Pipe diameter
Inch (mm)
A inch (mm)
Wing nut type Clutch type
Ø1/4 (Ø6.35)
0.04~0.07
(1.1~1.8)
0~0.02
(0~0.5)
Ø3/8 (Ø9.52)
Ø1/2 (Ø12.7)
Ø5/8 (Ø15.88)
Flare nut
Copper tube
Bar
Copper pipe
"A"
<Wing nut type>
<Clutch type>

12 CONNECTING PIPES
ENGLISH
Check
1 Compare the flared work with the figure by.
2If a flared section is defective, cut it off
and do flaring work again.
Welding
- Pipe connections can be done on the front
side or on the side according to the
installation environments.
- Be sure to let 1.0 kgf/cm2Nitrogen flow in
the pipe when we lding.
- If Nitrogen was not flown during welding,
many oxidized membranes may form inside
the pipe and disturb the normal operations of
valves and condensers.
Refrigerant Pipe
Regulator
Nitrogen
Nitrogen
Direction
Taping Valve
Rear Side Pipe
Knock Out Side Pipe
Knock Out
Knock-out hole
<PT3>
<PF2>
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged Cracked Uneven thickness
= Improper flaring =

INSTALLATION 13
ENGLISH
INSTALLATION
Indoor unit installation
1The mounting floor should be strong and
solid enough to prevent it from vibration.
2Drill the piping hole with 70 mm diameter
hole-core drill at either the right or the left
of indoor unit. The hole should be sightly
slant to the outdoor side.
3Insert the plastic tube through the hole.
4 Cut the extruded outside part of the plastic
tube, if necessary.
- When using knock-out hole to route
the piping, insert the plastic cover in
knock-out hole in order to prevent the
piping from damaged by sharp edge of
the hole.
* The feature may be changed according
to the type of model.
200 mm
70 mm 70 mm
90 mm
Wall
Core Drill
INSIDE OUTSIDE
Tilt
Cut if
necessary
More
than 15 mm
Wall
Plastic tube
(Bushing)
INSIDE OUTSIDE
Knock-out hole
Knock-out hole
• Install the product to remain horizontal
using the horizontal gauge.
• Do not damage cables when you install
the indoor unit. There is risk of fire or
electric shock.
<PT3>
<PF2>
CAUTION
!

14 INSTALLATION
ENGLISH
Indoor Unit Drain Piping
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
• 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 32 mm.
- Piping material: Polyvinyl chloride pipe
inner diometes Ø 25 mm and pipe fittings.
• Be sure to install heat insulation on the drain
piping.
- Heat insulation material: Polyethylene foam
with thickness more than 8 mm.
Drain test
The air conditioner uses a drain pump to drain
water.
Use the following procedure to test the drain
pump operation:
DIP Switch Setting
Outdoor Unit
In case that the products meet specific
conditions, “Auto addressing” function can
start automatically with the improved speed
by turning the DIP switch #3 of the outdoor
unit and resetting the power.
* Specific conditions:
- All names of the indoor units are
ARNU****4
- The serial number of Multi V super IV
(outdoor units) is after October 2013.
Feed water
Drain Pump
Drain pan
Flexible drain hose
(accessory)
Main
drain pipe
Glue the joint
Drain
port
Drain hose connection
Use the clip (accessory)
• The supplied flexible drain hose should
not be strained. A strained hose may
cause leakage of water.
INDOOR
UNIT
INDOOR
UNIT
WALL
DRAIN HOSE
WALL
DRAIN HOSE
DIP switch 7 segment
Outdoor Unit PCB
Outdoor Unit DIP Switch
CAUTION
!

INSTALLATION 15
ENGLISH
Group Control Setting
Group Control 1
nWired remote controller 1 + Standard Indoor Units
Some products have no DIP switch on PCB. It is possible to set indoor units to Master or Slave
by using the wireless remote controller instead of DIP switch.
For the details of the setting, please refer to the manual of the wireless remote controller.
1. It is possible to 16 indoor units(Max.) by one wired remote controller.
Set only one indoor unit to Master, set the others to Slave.
2. It is possible to connect with every type of indoor units.
3. It is possible to use wireless remote controller at the same time.
4. It is possible to connect with Dry Contact and Central controller at the same time.
- The Master indoor unit is possible to recognize Dry Contact and Central Controller only.
5. In case that any error occurs at indoor unit, the error code is displayed on the wired remote
controller.
It is possible to control the other indoor units except the error units.
nDIP Switch in PCB
GND
Signal
12 V
Master Slave Slave Slave
Display Error Message Only connect serial signal and
GND lines between indoor units.
or
LGAP Network System
Master
①Master Setting
- No. 3 Off
②Slave Setting
- No. 3 On
Indoor Unit DIP Switch

16 INSTALLATION
ENGLISH
GND
Signal
12 V
Slave
Slave
Master
or
Donʼt connect serial 12V line
LGAP Network System
Master
Master Master
Display Error Message
Group Control 2
nWired remote controllers + Standard Indoor Units
* It is possible to connect indoor units since Feb. 2009.
* It can be the cause of malfuctions when there is no setting of master and slave.
* In case of Group Control, it is possible to use following functions.
- Selection of operation, stop or mode
- Temperature setting and room temperature check
- Current time change
- Control of flow rate (High/Middle/Low)
- Reservation settings
- It is not possible at some functions.
* It is possible to control 16 indoor units(Max.) with the master wired remote control.
* Other than those, it is same with the Group Control 1.

INSTALLATION 17
ENGLISH
GND
Signal
12 V
LGAP Network System
FAU
Master
FAU
or
Slave
Master
Slave
Master
Master
Display Error Message Display Error Message
NM
Group Control 3
nMixture connection with indoor units and Fresh Air Intake Unit
* In case of connecting with standard indoor unit and Fresh Air Intake Unit, separate Fresh Air
Intake Unit with standard units. (N, M ≤16) (Because setting temperature are different.)
* Other than those, it is same with Group Control 1.
FAU Standard Standard FAU FAU Standard Standard FAU
* FAU : Fresh Air Intake Unit
Standard: Standard Indoor Unit

18 INSTALLATION
ENGLISH
2 Remote Control
nWired remote controller 2 + Indoor unit 1
LGAP Network System
Master
Master Slave
GND
Signal
12 V
Slave
Slave
Slave
or
Display Error Message
1. It is possible to connect two wired remote controllers (Max.) with one indoor unit.
Set only one indoor unit to Master, set the others to Slave.
Set only one wired remote controller to Master, set the others to Slave.
2. Every types of indoor unit is possible to connect two remote controller.
3. It is possible to use wireless remote controller at the same time.
4. It is possible to connect with Dry Contact and Central controller at the same time.
5. In case that any error occurs at indoor unit, the error code is displayed on the wired remote
controller.
6. There isn't limits of indoor unit function.

INSTALLATION 19
ENGLISH
Accessories for group control setting
It is possible to set group control by using below accessories.
Indoor unit 2 EA +Wired remote controller 1 EA Indoor unit 1 EA +Wired remote controller 2EA
* PZCWRCG3 cable used for connection * PZCWRC2 cable used for connection
Slave
Master
Master
PZCWRCG3
Master Slave
PZCWRC2
Apply totally enclosed noncombustible conduit in case of local building code Requiring plenum
cable usage.
CAUTION
!

20 INSTALLATION
ENGLISH
The A-weighted sound pressure emitted by this product is below 70 dB.
** The noise level can vary depending on the site.
The figures quoted are emission level and are not necessarily safe working levels. Whilst there is
a correlation between the emission and exposure levels, this cannot be used reliably to
determine whether or not further precautions are required. Factor that influence the actual level
of exposure of the workforce include the characteristics of the work room and the other sources
of noise, i.e. the number of equipment and other adjacent processes and the length of time for
which an operator exposed to the noise. Also, the permissible exposure level can vary from
country to country. This information, however, will enable the user of the equipment to make a
better evaluation of the hazard and risk.
ARN U G96 APF 4
Serial Number
Chassis Name
Electrical Ratings
3 : 1 Ø, 208/230 V, 60 Hz G :
1 Ø, 220 - 240 V, 50 Hz/1 Ø, 220 V, 60 Hz
Total Cooling Capacity in Btu/h
EX) 5 000 Btu/h ➝'05' 18 000 Btu/h ➝'18'
Combination of Inverter Type and Cooling Only or Heat Pump
N: AC Inverter and H/P V: AC Inverter and C/O
U: DC Inverter and H/P and C/O
System with Indoor Unit using R410A
❈ LGETA:U Ex) URN
Combinations of functions
A:Basic function
Limiting concentration is the limit of Freon gas concentration where immediate measures can be
taken without hurting human body when refrigerant leaks in the air. The limiting concentration
shall be described in the unit of kg/m3(Freon gas weight per unit air volume) for facilitating
calculation
nCalculate refrigerant concentration
Refrigerant concentration =
Total amount of replenished refrigerant in refrigerant facility (kg)
Capacity of smallest room where indoor unit is installed (m3)
Limiting concentration: 0.44 kg/m3 (R410A)
Limiting concentration
Airborne Noise Emission
Model Designation