LG AUUH306C User manual

LG Ceiling Duct-Type
Air Conditioner
INSTALLATION MANUAL
LG
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 ESPAÑOL

2Ceiling Duct Type Air Conditioner
Ceiling Duct Type Air Conditioner Installation Manual
TABLE OF CONTENTS
Safety precautions .....3
Installation of Indoor,
Outdoor unit................6
Connecting Pipes to the
Indoor Unit ................15
Connecting Pipes to the
Outdoor Unit .............17
Checking the Drainage
....................................17
Connecting Cables
between Indoor Unit and
Outdoor Unit .............18
Air Purging of the
Connecting Pipes and the
Indoor Unit ...............21
Group Control ...........22
Two Thermistor
System.......................22
E.S.P (External Static
Pressure) Setting......23
How to set E.S.P?. ....24
Installation guide at the
seaside ......................25
• Four Type “A” screws
• Connecting cable
• Pipes: Gas side .....1 /
2
",
5
/
8
",
3
/
4
"
Liquid side .............
1
/
4
",
3
/
8
",
1
/
2
"
• Insulated drain hose
•
Insulation materials
• Additional Drain hose
(Inner Dia...............25 mm)
• Level
• Screw driver
• Electric drill
• Hole core drill (ø70 mm)
• Flaring Tools set
• Screw driver
•
Hexagonal Wrench
(4 mm/5 mm)
• Gas-leak Detector
Installation
Requirements Required Parts Required Tools

Safety Precautions
Installation Manual 3
ENGLISH
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.
Use this appliance on a
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.
Install the panel and the cover
of control box securely.
• 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.

Safety Precautions
4Ceiling Duct Type Air Conditioner
■Operation
Do not modify or extend the power cable.
• There is risk of fire or 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.
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 conditioner could fall with it,
causing property damage, product failure, and personal
injury.
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.
Do not store or use flammable gas or
combustibles near the product.
• There is risk of fire or failure of product.
Gasolin

Safety Precautions
Installation Manual 5
ENGLISH
■Installation
CAUTION
Always check for gas (refrigerant) 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 properly.
• 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 outdoor unit could damage the
neighborhoods.
• It may cause a problem for your neighbors.
90°
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.

6Ceiling Duct Type Air Conditioner
Installation of Indoor, Outdoor Unit
1. Selection of the best location
1) Indoor unit
Select location
Install the air conditioner in the location that
satisfies the following 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 allow easy water
drainage.(Suitable dimension “H”is necessary
to get a slope to drain as figure.)
•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
2) Outdoor unit
•If an awning is built over the unit to prevent
direct sunlight or rain exposure, be careful
that heat radiation from the condenser is not
restricted.
•There should not be any animals or plants
which could be affected by hot air
discharged.
•Ensure the spaces indicated by arrows from
the wall, ceiling, fence or other obstacles.
More than
300 mm
More than
300 mm
More than
700 mm
Sunroof
Fence or
obstacles
H
600600
Top view
(unit: mm)
Front view
Front
Inspection hole
(600X600)
Control box
1000
Installation of Indoor, Outdoor Unit

Installation of Indoor, Outdoor Unit
Installation Manual 7
ENGLISH
3) Piping length and the elevation
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
CAUTION:
•Rated performance for refrigerant line length of:7.5 m
•Capacity is based on standard length and maximum allowance length is on
the basis of reliability.
•Improper refrigerant charge may result in abnormal cycle.
•Oil trap should be installed every 10 meters.
Gas Liquid Standard Max. Standard Max.
7.5 50 5 30 35
7.5 50 5 30 35
1/4 "(6.35 mm)
7.5 50 5 30 35
1/2 "(12.7 mm)
1/4 "(6.35 mm)1/2 "(12.7 mm)
1/4 "(6.35 mm)5/8 "(15.88 mm)
Capacity
Pipe Size Length A(m) Elevation B(m) *Additional
(Diameter:Ø)refrigerant(g/m)
18 kBtu/h
24 kBtu/h
30 kBtu/h

8Ceiling Duct Type Air Conditioner
Installation of Indoor, Outdoor Unit
2. Indoor 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.
•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
CASE 2
POSITION OF CONSOLE BOLT
(Unit:mm)
Drainage hole
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
A
B
CD
(G)
H
I
EF
ABCDEF(G)HI
18 kBtu/h
24 kBtu/h
30 kBtu/h
36 kBtu/h
932 880 355 45.5 450 30 87 750 163
Dimension
Capacity
1232 1182 355 45.5 450 30 87 830 186

Installation Manual 9
ENGLISH
Installation of Indoor, Outdoor Unit
•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.
1 Set anchor
Old building New building
2 Plate washer
3 Spring washer
4 Nut
5 Suspension
bolts
Tighten the nut and bolt to prevent
unit falling
CAUTION
•Local supply
Set anchor
Plate washer - M10
Spring washer - M10
Nut - W3/8 or M10
Suspension bolt - W3/8 or M10

10 Ceiling Duct Type Air Conditioner
Installation of Indoor, Outdoor Unit
Ceiling
CAUTION
1~3 mm
Drainage hole
Drainage hole
U-Trap
B
C
A 70 mm
B 2C
C 2 x SP
SP = External Pressure
(mmAq)
Ex) External Pressure
= 10 mmAq
A 70 mm
B 40 mm
C 20 mm
A
Make sure to be closed.
Unit
Drainage pipe
(Local supply)
Thermal insulator
(Local supply)
Drainage hole
CAUTION FOR GRADIENT OF
UNIT AND DRAIN PIPING
Lay the drain hose with a downward
inclination so water will drain out.
Front of view
•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.
•Install the P-Trap (or U-Trap) to prevent
a water leakage caused by the blocking
of intake air filter.
Applied U-Trap Dimension
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 5 mm.
•The unit must be horizontal or declined to the drain hose connected when finished
installation.
CORRECT
CORRECT
INCORRECT
INCORRECT
•Upward routing not
allowed