LG WBNB036AAA0 User manual

P/No.: MFL31137101

LG Ceiling Duct-Type
Fan Coil Unit
INSTALLATION MANUAL
LG
IMPORTANT
• Please read this installation manual carefully and
thoroughly before installing and operating the unit.
• Please retain this installation manual for future reference
after reading it thoroughly.
• Installation work must be performed in accordance with
the national wiring standards by authorized personnel
only.
MODELS: WBNB036AAA0
WBNB046BAA0
WBNB066CAA0
WBNB086DAA0
WBNB106EAA0
WBNB126FAA0
WBNB146GAA0

2Fan Coil Unit
Fan Coil Unit Installation Manual
TABLE OF CONTENTS
FOR YOUR RECORDS
Write the model and serial numbers here:
Model #
Serial #
You can find them on a label on the side of each unit.
Dealer's Name
Date Purchased
■
Staple your receipt to this page in the event you need it
to prove date of purchase or for warranty issues.
READ THIS MANUAL
Inside you will find many helpful hints on how to use and
maintain your air conditioner properly. Just a little
preventive care on your part can save you a great deal
of time and money over the life of your air conditioner.
You'll find many answers to common problems in the
chart of troubleshooting tips. If you review our chart of
Troubleshooting Tips first, you may not need to call for
service at all.
PRECAUTION
• Contact the installer for installation of this unit.
• The unit is not intended for use by young children or
invalids without supervision.
• Young children should be supervised to ensure that
they do not play with the unit.
• When the power cord is to be replaced, replacement
work shall be performed by authorized personnel only
using only genuine replacement parts.
• Installation work must be performed in accordance
with the National Electric Code by qualified and
authorized personnel only.
Safety Precautions.................3
Care and maintenance...........8
Before you call for service ..10
Installation ............................11

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.
■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.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
Be sure not to do.
Be sure to follow the instruction.
WARNING
■Installation
Do not use a defective or
underrated circuit breaker.
Usethisapplianceona
dedicated circuit.
• 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 repair the
product. There is risk of fire or
electric shock.
Always ground the product.
• 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.

4Fan Coil Unit
Do not store or use flammable
gas or combustibles near the
product.
• There is risk of fire or failure of
product.
Do not use the product in a
tightly closed space for a
long time.
• Oxygen deficiency could occur.
When flammable gas leaks, turn off
the gas and open a window for
ventilation before turn the product on.
• Do not use the telephone or turn
switches on or off.
There is risk of explosion or fire
Gasolin
Safety Precautions
■Operation
Do not install, remove, or
re-install the unit by yourself
(customer).
• There is risk of fire, electric
shock, explosion, or injury.
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
evaporator.
For installation, always
contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric
shock, explosion, or injury.
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 a heater or
other appliances near the
power cable.
• There is risk of fire and electric
shock.
Do not let the unit run for a long
timewhenthehumidityisveryhigh
and a door or a window is left open
.
• Moisture may condense and wet
or damage furniture.
Take care to ensure that power
cable could not be pulled out or
damaged during operation.
• There is risk of fire or electric
shock.
Do not place anything on the
power cable.
• There is risk of fire or electric
shock.

Installation Manual 5
Safety Precautions
If strange sounds, or small
or smoke comes from
product. Turn the breaker off
or disconnect the power
supply cable.
• There is risk of electric shock or
fire.
Stop operation and close the
window in storm or cyclone.
If possible, remove the
product from the window
before the cyclone arrives.
• There is risk of property damage,
failure of product, or electric shock.
When the product is soaked
(flooded or submerged),
contact an Authorized
Service Center.
•Thereisriskoffireorelectric
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.
• There is risk of fire or electric
shock.
Turn the main power off
when cleaning or
maintaining the product.
•Thereisriskofelectricshock.
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 product damage or failure, or
unintended operation.

Safety Precautions
6Fan Coil Unit
■Installation
CAUTION
■Operation
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.
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.
90°
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, 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.
Do not block the inlet or
outlet of air flow.
•It may cause product failure.

Safety Precautions
Installation Manual 7
Use a soft cloth to clean. Do
not use harsh detergents,
solvents, etc.
•There is risk of fire, electric shock,
or damage to the plastic parts of
the product.
Do not touch the metal parts
of the product when
removing the air filter. They
areverysharp!
•There is risk of personal injury.
Always insert the filter
securely. Clean the filter
every two weeks or more
often if necessary.
•A dirty filter reduces the efficiency
of the air conditioner and could
cause product malfunction or
damage.
Wax
Thinner
Do not insert hands or other
objects through the air inlet
or outlet while the product is
operated.
•There are sharp and moving parts
that could cause personal injury.
Do not drink the water
drained from the product.
•It is not sanitary and could cause
serious health issues.
Use a firm stool or ladder
when cleaning or
maintaining the product.
•Be careful and avoid personal
injury.

Care and maintenance
8Fan Coil Unit
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Air outlet vent
Air outlet vent
Air filters
Indoor Unit
Caution: Before performing any maintenance, turn off the main power to the system.
❏Turn the system off before cleaning. To clean,
wipewithasoft,drycloth.Donotusebleachor
abrasives.
Note:
Supply power must be disconnected before
cleaning the indoor unit.
❏
Never use any of the followings:
•Water hotter than 40°C
Could cause deformation and/or
discoloration.
•Volatile substances
Could damage the surfaces
of the air conditioner.
Clean the filter with a vacuum or warm, soapy
water.
•If very dirty, wash with a solution of
detergent in lukewarm water.
After washing with water, dry well in the shade.
Re-install the air filter.
Air Filter
The air filters behind Indoor unit
(the suction side) should be checked and cleaned
once every 2 weeks or more often if necessary.
1
2
3
Care and maintenance

Care and maintenance
Installation Manual 9
1
2
Whentheunitisnotgoingtobeusedforalongtime.
Operation Tips
Helpful information
The air filters and your electiric bill.
If the air filters become clogged with dust, the
cooling capacity will drop, and 6% of the
electricity used to operate the air conditioner will
be wasted.
When it is not going to be used for
a long time. When the unit is to be used again.
Operate the unit on Air circulation mode for
2 to 3 hours.
•This will dry out the internal parts.
CAUTION: Turn off the circuit
breaker when the air conditioner is not
goingtobeusedforalongtime.
Dirt may collect and may cause a fire.
■Check that the air inlet and outlet of the
unit are not blocked.
Do not overcool the room.
This is not good for the health
and wastes electricity.
Keep blinds or curtains
closed.
Do not let direct sunshine
enter the room when the unit
is in operation.
Make sure that the doors
and windows are shut tight.
Avoid opening doors and
windows as much as possible
to keep the cool air in the
room.
Clean the air filter regularly.
Blockages in the air filter
reduce the airflow and lower
cooling and dehumidifying
effects. Clean at least once
every two weeks.
Ventilate the room
occasionally.
Since windows are kept
closed, it is a good idea to
open them and ventilate the
room now and then.
Turn off the circuit breaker.