LG ARNU48GBRZ4 INSTALLATION MANUAL
INSTALLATION MANUAL
AIR
CONDITIONER
ENGLISH
ESPAÑOL
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.
Multi V FRESH AIR INTAKE UNIT
Original instruction
www.lg.com
P/NO : MFL67142715
Copyright © 2017 LG Electronics Inc. All Rights Reserved.
Fresh Air Intake Unit Installation Manual
TABLE OF CONTENTS
Installation Requirements
Features...................................3
Safety Precautions.................4
Installation
Installation limit ......................9
Selection the best location ..11
Ceiling opening dimension
and hanging bolt location....12
Indoor Unit Installation ........13
Wiring Connection...............13
Checking the Drainage .......14
Indoor Unit Drain Piping......15
Required Parts Required Tools
o Level gauge
o Four type "A" screws
o Connecting cable
o Pipes: Gas side
Liquid side
(Refer to Product
Data)
o Insulation materials
o Additional drain pipe
o Screw driver
o Electric drill
o Hole core drill
o Flaring tool set
o Specified torque wrenches
(different depending on model No.)
o Spanner.......Half union
o A glass of water
o Screw driver
o Hexagonal wrench
o Gas-leak detector
o Vacuum pump
o Gauge manifold
Dip Switch Setting ...............17
Group Control Setting .........18
Model Designation ..............23
Airborne Noise Emission ....23
Limiting concentration .........23
How to Set E.S.P?................24
2 Indoor Unit
o Owner's manual
o Thermometer
Features
Feature
ENGLISH
Wired Remote Controller
Installation Tool
Name Drain hose Clamp metal
Quantity
Shape
1 EA 2 EA 8 EA 4 EA 1 SET
Air outlet vents
Air intake vents
Washer for
hanging bracket
Clamp
(Tie Wrap)
Air filters
Insulation for
fitting
for gas pipe
for liquid pipe
(Other)
• Owner's manual
Installation manual
•
Installation Manual 3
Safety Precautions
WARNING
CAUTION
WARNING
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must be
followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classi-
fied by the following indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
n Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
n Installation
Do not use a defective
or underrated circuit
breaker. Use this appliance on a dedicated
circuit.
• 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.
Do not modify or extend the power cable.
• There is risk of fire or
electric shock.
For electrical work,
contact the dealer,
seller, a qualified electrician, or an Authorized Service Center.
• Do not disassemble or
• There is risk of fire or
repair the product.
There is risk of fire or
electric shock.
Always install a dedicated circuit and
breaker.
• Improper wiring or in-
• There is risk of fire or
stallation may cause fire
or electric shock.
Do not install, remove,
or re-install the unit by
yourself (customer).
• There is risk of fire,
•
electric shock, explosion, or injury.
Always ground the
product.
electric shock.
Use the correctly rated
breaker or fuse.
electric shock.
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.
4 Indoor Unit
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.
Safety Precautions
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.
ENGLISH
Do not turn on the breaker or power
under condition that front panel,
cabinet, top cover, control box
cover are removed or opened.
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.
• Otherwise, it may cause fire, electric
shock, explosion or death.
• There is the risk of death, injury, fire or
explosion.
n Operation
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 fur-
Take care to ensure
that power cable could
not be pulled out or
damaged during operation.
• There is risk of fire or
electric shock.
niture.
Do not plug or unplug
the power supply plug
during operation.
• There is risk of fire or
electric shock.
Do not touch(operate)
the product with wet
hands.
• There is risk of fire or
electrical shock.
Do not place anything
on the power cable.
• There is risk of fire or
electric shock.
Do not place a heater
or other appliances
near the power cable.
• There is risk of fire and
electric shock.
Do not allow water to
run into electric parts.
•
It may cause There is
• There is risk of fire or
risk of fire, failure of the
product, or electric shock.
Do not store or use
flammable gas or combustibles near the
Do not use the product
in a tightly closed
space for a long time.
product.
• Oxygen deficiency could
failure of product.
occur.
Installation Manual 5
Safety Precautions
When flammable gas
leaks, turn off the gas
and open a window for
ventilation before turn
the product on.
If strange sounds, or
small or smoke comes
from product. Turn the
breaker off or disconnect the power supply
cable.
• Do not use the telephone or turn switches
• There is risk of electric
shock or fire.
on or off. There is risk of
explosion or fire.
Do not open the inlet
grill of the product during operation.
(Do not touch the electrostatic filter, if the
When the product is
soaked (flooded or
submerged), contact
an Authorized Service
Center.
unit is so equipped.)
• There is risk of physical
injury, electric shock, or
• There is risk of fire or
electric shock.
product failure.
Stop operation and
close the window in
storm or hurricane.
If possible, remove the
product from the window before the hurricane arrives.
• There is risk of property
damage, failure of product, or electric shock.
Be cautious that water
could not enter the
product.
• There is risk of fire,
electric shock, or product damage.
Ventilate the product
from time to time when
operating it together
with a stove, etc.
Turn the main power
off when cleaning or
maintaining the product.
When the product is
not be used for a long
time, disconnect the
power supply plug or
turn off the breaker.
• There is risk of fire or
electric shock.
• There is risk of electric
shock.
• There is risk of product
damage or failure, or
unintended operation.
Take care to ensure that nobody could step on or fall onto the outdoor
unit.
• This could result in personal injury and product damage.
6 Indoor Unit
CAUTION
n Installation
Safety Precautions
ENGLISH
Always check for gas
(refrigerant) leakage
after installation or re-
Install the drain hose
to ensure that water is
drained away properly.
pair of product.
• Low refrigerant levels
may cause failure of
• A bad connection may
cause water leakage.
product.
Do not install the product where the noise or
hot air from the outdoor
Use two or more people to lift and transport
the product.
unit could damage the
neighborhoods.
• It may cause a problem
• Avoid personal injury.
for your neighbors.
Keep level even when
installing the product.
• To avoid vibration or
water leakage.
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.
n Operation
Do not expose the skin
directly to cool air for
long periods of time.
(Don't sit in the draft.)
• This could harm to your
health.
Do not use the product
for special purposes,
Do not block the inlet
or outlet of air flow.
such as preserving
foods, works of art, etc.
It is a consumer air conditioner, not a precision
refrigeration system.
• There is risk of damage
or loss of property.
• It may cause product
failure.
Installation Manual 7
Safety Precautions
Use a soft cloth to
clean. Do not use
harsh detergents, solvents, etc.
• There is risk of fire,
• There is risk of personal
electric shock, or damage to the plastic parts
of the product.
Always insert the filter
securely. Clean the filter
every two weeks or
more often if necessary.
•
A dirty filter reduces the
• There are sharp and
efficiency of the air conditioner and could cause
product malfunction or
damage.
Use a firm stool or ladder when cleaning or
maintaining the product.
Do not touch the metal
parts of the product when
removing the air filter.
Do not step on or put
anyting on the product.
(outdoor units)
They are very sharp!
• There is risk of personal
injury.
injury and failure of
product.
Do not insert hands or
other objects through the
air inlet or outlet while the
Do not drink the water
drained from the product.
product is operated.
• It is not sanitary and
moving parts that could
cause personal injury.
Replace the all batteries in
the remote control with
new ones of the same
type. Do not mix old and
could cause serious
health issues.
Do not recharge or disassemble the batteries.
Do not dispose of bat-
teries in a fire.
new batteries or different
types of batteries.
• Be careful and avoid
personal injury.
If the liquid from the batteries gets
onto your skin or clothes, wash it well
with clean water. Do not use the remote if the batteries have leaked.
• The chemicals in batteries could
cause burns or other health hazards.
8 Indoor Unit
• There is risk of 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.
• They may burn or explode.
Installation
Installation
Installation Limit
Read completely, then follow step by step.
1. Fresh Air Intake Unit Combination
No Connection Condition Combination
1) The total capacity of Fresh Air Intake Unit should be 50~100% of outdoor unit.
Only Fresh Air Intake Unit installation
1
Mixture Installation with standard
2
2) The total capacity of Fresh Air Intake Units should be less than 30% the total
indoor units and Fresh Intake Units
CAUTION : Failure to comply with the above connection conditions for installation, it can cause cooling & heating capacity down.
2. Connection of the Outdoor Unit
It is possible to connect Heat Pump Models.
It is not possible to connect Heat Recovery Models.
<Only Fresh Air Intake Unit install>
Outdoor : 10HP
FAU
FAU
5HP 5HP
<Wrong Install>
Outdoor : 20HP
2) The max quantity of Fresh Air Intake unit is 2 Units.
1) The total capacity of indoor units (standard Indoor Unit + Fresh Air Intake Unit)
should be 50~100% of outdoor unit.
capacity of indoor units.
<Mixture Install>
Outdoor : 20HP
FAU
Standard Standard Standard
5HP
5HP 5HP 5HP
ENGLISH
FAU
Standard Standard Standard Standard
5HP 5HP 5HP 5HP 5HP
* FAU : Fresh Air Intake Unit
Standard: Standard Indoor Unit
▶ The total capacity of indoor units exceed 100% of outdoor unit
3. Installation of intake air duct
Min. 2m
1/30 Slope
Outlet Air
① Inlet Hood
Inlet Hood should be installed such that no water enter inside the unit
② Intake Air Duct
The Intake Air Duct must have down-slope about 1/30.
The length of Intake Air Duct should be longer than 2m.
③ Fresh Air Intake Unit
If wired remote controller is not connected, it will display strange value to the room temperature
④ Exhaust Fan
Fresh Air Intake Unit will make room the positive pressure.
Exhaust fan should be installed to maintain the room pressure.
⑤ Door
It would be possible to raise in the room air pressure because of Fresh Air Intake Unit.
In that case, the door could hurt someone in front of door.
So be careful of the positive pressure to design the door.
Exhaust air
Inlet Hood
Intake Air Duct
Fresh Air Intake Unit
Exhaust Fan
Door
Installation Manual 9
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