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
B
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e
S
C
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I
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G
C
L
B
A
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G
E
R
S
I
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N
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R
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.

Before you call for service...
10 Fan Coil Unit
Check the following points before requesting repairs or service.... If the malfunction persist, please contact your
dealer.
Troubleshooting Tips! Save time and money!
The unit does not operate.
The room has a peculiar odor.
Does not cool or heat effectively.
4
4, 5, 7
•Has the fuse blown or has the circuit breaker
been tripped?
•Check that this is not a damp smell exuded by
the walls, carpet, furniture or cloth items in the
room.
•Is the air filter dirty? See air filter cleaning
instructions.
•The room may have been very hot when the
unit was first turned on. Allow time for it to cool
down.
•Are the indoor unit's air inlet or outlet vents
obstructed?
Case Explanation See page
Before you call for service...

Installation
Installation Manual 11
Installation
Selection of the best location
Install the fan coil unit in the location that satisfies the
following conditions.
•The place shall easily bear a load exceeding four
times the 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 allow easy water drainage.(Suitable
dimension “H”is necessary to get a slope to drain as
figure.)
•The place where the unit is not affected by an
electrical noise.
•There should not be any heat source or steam near
the unit
H
600600
Top view
(unit: mm)
Front view
Front
Rear
1000
300
Confirm the positional relationship between the unit
and suspension bolts.
•Installation the ceiling opening to clean the filter or
service under the product.
A(Min) B(Min)
Ceiling
Service Space
A
B
200
Model DIMENSION
AB
WBNB036AAA0 540 730
WBNB046BAA0 540 850
WBNB066CAA0 540 1090
WBNB086DAA0 540 1330
WBNB106EAA0 540 1570
WBNB126FAA0 540 1720
WBNB146GAA0 540 1720

Installation
12 Fan Coil Unit
Fan coil unit installation
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.
CASE 1
POSITION OF SUSPENSION BOLT
Drainage pan
1-3 mm
I
H
CD
E
F
G
A
B
Model DIMENSION
ABCDEFGHI
WBNB036AAA0 630 660 215 143 516 20 70 120 600
WBNB046BAA0 750 780 215 143 516 20 70 120 720
WBNB066CAA0 990 1020 215 143 516 20 70 120 960
WBNB086DAA0 1230 1260 215 143 516 20 70 120 1200
WBNB106EAA0 1470 1500 215 143 516 20 70 120 1440
WBNB126FAA0 1620 1650 215 143 516 20 70 120 1590
WBNB146GAA0 1620 1650 215 143 516 20 70 165 1590

Installation Manual 13
Installation
•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.
•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 suspension
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.
CAUTION:
Tighten the nut and bolt to
prevent unit falling.
CASE 2
POSITION OF CONSOLE BOLT
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
1 Set anchor
Old building New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
bolts

14 Fan Coil Unit
Installation
CAUTION:
Ceiling
Drainage hole Make sure to be closed.
Unit
Drainage pipe
(Local supply)
Thermal insulator
(Local supply)
CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING
Lay the drain hose with a downward
inclination so water will drain out.
CORRECT INCORRECT
CORRECT INCORRECT
Front of view
1-3 mm
1. Install declination of the unit is very important for the drain of the duct type unit.
2. Minimum thickness of the insulation for the connecting pipe shall be 20mm.
•The unit must be horizontal or declined to the drain hose connected when finished installation.
•Always lay the drain with downward inclination
(1/50 to 1/100).
Prevent any upward flow or reverse flow in any
part.
•5mm or thicker formed thermal insulator shall
always be provided for the drain pipe.

Installation Manual 15
Installation
Insulation, others
Insulate the joint and tubes completely.
THERMAL INSULATION
All thermal insulation must comply with local requirement
the thickness min 20mm.
Make sure that there is no clearance here.
Overlap with thermal
insulator for piping.
Thermal insulator for water pipe
(Local supply) Thermal insulator for
piping(Local supply)
Hose clip for thermal insulator(Local supply)
Union for water pipe
Water pipe and thermal
insulator(Local supply)
Thermal insulator for water pipe
(Local supply)
Hose clip for thermal insulator
(Local supply)
Air exit
Connecting Cable to the Fan Coil Unit
•WBNB036AAA0~WBNB066CAA0
•WBNB086DAA0~WBNB146GAA0
GND
GND
GND
GND
GND
■Connect the wires to the terminals on the control board individually according to the thermostat.
•Ensure that the color of the wires of unit and the terminal No. are the same as those of unit respectively.
■Wiring Diagram

16 Fan Coil Unit
Installation
The power cord connected to the unit should be
complied with the following specifications (Rubber
insulation, type H05RN-F approved by HAR or SAA).
If the supply cord is damaged, it must be replaced by a special cord or assembly availible from the manufacturer of its service agent.
Install Power Cord
CAUTION
20mm
GN/YL
NORMAL CROSS-SECTIONAL
AREA 1.25mm2
Less thean 10mmLess thean 10mm
T/B Cover
CAUTION:
Make sure that the screws of the terminal fixed tightly.
CAUTION: Prepare the wiring as follows:
1) Never fail to have an individual power specialized for the unit. As for the method of wiring, be guided by the
circuit diagram pasted on the side panel.
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) 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 there of, fuse breaking, disturbance to the normal
function of a overload protection device.

Installation Manual 17
Installation
Checking the Drainage
Water Quality
Checking the Drainage
- Spray one or two glasses of water upon the
evaporator.
- Ensure that water flows drain hose of unit without
any leakage.
The standards for cooling water quality
The standards for adding water quality
Index
PH[25°C] 6.5~8.0 OO
Electric cOnductivity[25°C](µs/cm) Below 800 OO
ChlOride iOn(mgCl-/L) Below 200 O
Sulfate iOn (mgSO42-/L) Below 200 O
Acid cOnsumptiOn[PH4.8](mgCaCO3/L) Below 100
O
Calcium hardness(mgCaCO3/L) Below 150
O
Turbidity Below 20 OO
Fe(mgFe/L) Below 1.0 OO
AmmOnium iOn(mgNH4+/L) Below 1.0
O
IOnic phases silica(mgSiO2/L) Below 50 O
SaturatiOn index 0.0~1.0 OO
Item Standards The influence of water quality
Corrosion The formation of scale
Standard
Item
Reference
Item
Index
PH[25°C] 6.5~8.0
Electric conductivity[25°C](µs/cm) Below 200
Chloride ion(mgCl-/L) Below 50
Sulfate ion (mgSO42-/L) Below 50
Acid consumption[PH4.8](mgCaCO3/L) Below 50
Calcium hardness(mgCaCO3/L) Below 50
Turbidity Below 50
Fe(mgFe/L) Below 50
Ammonium ion(mgNH4+/L) Below 50
Ionic phases silica(mgSiO2/L) Below 50
Item Standards
Standard Item
Reference Item