LG LT-H488DLE1 Installation guide

INSTALLATION MANUAL
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.
TYPE : CEILING CASSETTE
www.lg.com
P/NO : 3828A10001Y
Ceiling Cassette Air Conditioner Installation Manual
TABLE OF CONTENTS
Installation
Requirements
Required Parts
Required Tools
Safety Precautions............................3
❏ Connecting cable
❏ Horizontal meter
❏ Pipes: Gas side
Liquid side
❏ Screw driver
Introduction ........................................8
Symbols used in this Manual..........8
Features ...........................................8
Installation ..........................................9
❏ Hanging Bolt
(W 3/8 or M10 length 650mm)
❏ Electric drill
❏ Hole core drill (ø70mm)
❏ Insulated drain hose
❏ Flaring Tools set
❏ Additional Drain hose
(Inner Dia.............32mm)
❏ Torque Wrenches
❏ Hexagonal Wrench (4mm, 5mm)
Installation Tools...............................9
❏ Gas-leak detector
Installation of Indoor, Outdoor
Unit ................................................10
❏ Owner’s Manual
Air purging......................................22
Test running .................................24
Optional operation .....................26
Installation guide at the seaside ...29
2 Ceiling Cassette Air Conditioner
❏ Installation Manual
❏ Thermometer
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.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
■ Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
■ 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.
For electrical work, contact
Always ground the product.
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.
• Do not disassemble or repair the • There is risk of fire or electric
product. There is risk of fire or
shock.
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.
Installation Manual 3
Safety Precautions
Do not modify or extend the
power cable.
• There is risk of fire or electric
shock.
Do not install, remove, or reinstall the unit by yourself
(customer).
• There is risk of fire, electric
shock, explosion, or injury.
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 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.
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.
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.
• There is the risk of death, injury, fire or explosion.
■ Operation
Do not let the air conditioner run for a long Take care to ensure that power
time when the humidity is very high and a
cable could not be pulled out or
door or a window is left open.
damaged during operation.
• Moisture may condense and wet • There is risk of fire or electric
or damage furniture.
shock.
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.
4 Ceiling Cassette Air Conditioner
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.
Safety Precautions
Do not allow water to run into
electric parts.
• It may cause There is risk of fire,
failure of the product, or electric
shock.
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.
Gasolin
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
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 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.
Do not open the inlet grill of the
product during operation.
(Do not touch the electrostatic
filter, if the unit is so equipped.)
• There is risk of physical injury,
electric shock, or product failure.
When the product is soaked
(flooded or submerged),
contact an Authorized Service
Center.
• There is risk of fire or electric
shock.
Be cautious that water could
not enter the product.
Ventilate the product from time to time when
operating it together with a stove, etc.
• There is risk of fire or electric shock.
• There is risk of fire, electric shock,
or product damage.
Turn the main power off when cleaning or
maintaining the product.
• There is risk of electric shock.
Installation Manual 5
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.
Take care to ensure that nobody
could step on or fall onto the
outdoor unit.
• This could result in personal injury
and product damage.
■ Installation
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.
90˚
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.
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.
■ 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.
6 Ceiling Cassette Air Conditioner
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.
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 are very sharp!
• There is risk of personal injury.
x
Wa Thinner
Do not step on or put anyting
on the product. (outdoor
units)
• There is risk of personal injury
and failure of product.
Do not drink the water
drained from the product.
• It is not sanitary and could cause
serious health issues.
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.
Use a firm stool or ladder
when cleaning or maintaining
the product.
• Be careful and avoid personal
injury.
Do not recharge or disassemble the batteries.
Do not dispose of batteries in a fire.
• They may burn or explode.
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.
Replace the all batteries in the
remote control with new ones of
the same type. Do not mix old
and new batteries or different
types of batteries.
• There is risk of fire or explosion
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.
Installation Manual 7
Introduction
Introduction
Symbols used in this Manual
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that may cause harm to the
air conditioner.
NOTICE
This symbol indicates special notes.
Features
Heat Pump Model
Anti-bacteria
Air
Intake
Signal Receptor
Cooling Model
Air Outlet
Remote
Controller
Signal Receptor
8 Ceiling Cassette Air Conditioner
Installation
Installation
Installation Tools
Figure
Name
Figure
Name
Screw driver
Ohmmeter
Electric drill
Hexagonal wrench
Measuring tape, Knife
Ammeter
Hole core drill
Gas-leak detector
Spanner
Thermometer,
Horizontal meter
Torque wrench
Flaring tool set
Installation Manual 9
Installation
yyy
;;;
;;;
yyy
;;
y
;
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.
Ceiling
Ceiling Board
50 or
more
Ceiling Board
30 or less
• 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.
50 or
more
Above 250
400 or less
1) Indoor unit
100
or more
Selection of the best location
30 or more
Installation of Indoor, Outdoor Unit
Unit:cm
Floor
More than
30cm
Fe
ob nce
sta or
cle
s
Su
nro
of
More than
30cm
More than 50cm
More than 70cm
10 Ceiling Cassette Air Conditioner
Installation
3) Piping length and the elevation
Pipe Size
mm(inch)
Grade
Gas
Liquid
Standard
Max.
Standard
Max.
*Additional
refrigerant
(g/m)
Length A(m)
Elevation B(m)
18kBtu/h
12.7(1/2") 6.35(1/4")
7.5
30
5
20
20
24kBtu/h
15.88(5/8") 6.35(1/4")
7.5
50
5
30
35
28kBtu/h
15.88(5/8") 6.35(1/4")
7.5
50
5
30
35
36kBtu/h
15.88(5/8") 6.35(1/4")
7.5
50
5
30
50
48kBtu/h
19.05(3/4") 9.52(3/8")
7.5
50
5
30
45
54kBtu/h
19.05(3/4") 9.52(3/8")
7.5
50
5
30
60
Outdoor unit
Indoor unit
Outdoor unit
A
B
A
Outdoor unit
Oil trap
B
Indoor unit
A
B
Indoor unit
If piping length is more than 10m
CAUTION:
• Rated performance for refrigerant line length of:7.5m
• 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.
Installation Manual 11
Installation
Ceiling opening dimensions and hanging bolt location
• The dimensions of the paper model for installing are the same as those of the ceiling opening dimensions.
600 (Ceiling opening)
521(Hanging bolt)
810
785
30
39.5
30
Grade :18kBtu/h
840
810
672
840
Indoor
Grade : 24k/28k/36kBtu/h
48k/54kBtu/h
Unit:mm
• Select and mark the position for fixing bolts
and piping hole.
• Decide the position for fixing bolts slightly
tilted to the drain direction after considering
the direction of drain hose.
• Drill the hole for anchor bolt on the ceiling.
• The hole size for four anchor bolts is
Ø14.5mm & 40mm depth.
CAUTION:
• This air-conditioner uses a drain pump.
• Horizontly install the unit using a
level gauge.
• During the installation, care should be
taken not to damage electric wires.
30
75
450 (Hanging bolt)
75
570 Unit size
570 Unit size
600 (Ceiling opening)
30
39.5
Unit:mm
Ceiling
Level gauge
Ceiling board
NOTICE
• Thoroughly study the following installation locations:
1. In such places as restaurants and kitchens, considerable amount of oil steam and flour adhere to the
turbo fan, the fin of the heat exchanger and the drain pump, resulting in heat exchange reduction,
spraying, dispersing of water drops, drain pump malfunction, etc.
In these cases, take the following actions:
• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient
capacity so that it draws oily steam which should not flow into the suction of the air conditioner.
• Make enough distance from a cooking room to install the air conditioner in such a place where it
may not suck in oily steam.
Air conditioner
Take enough
distance
Use the ventilation fan
for smoke-collecting
hood with sufficient
capacity.
Cooking table
2. Avoid installing air conditioner in such circumstances where cutting oil mist or iron powder is in
suspension in factories, etc.
3. Avoid places where inflammable gas is generated, flows in, is stored or vented.
4. Avoid places where sulfurous acid gas or corrosive gas is generated.
5. Avoid places near high frequency generators.
12 Ceiling Cassette Air Conditioner
Installation
The Indoor Unit Installation
Ceiling
Nut
(W3/8 or M10)
Spring washer
(M10)
Keep the length of the bolt
from the bracket to 40mm
Flat washer for M10
(accessory)
Ceiling board
Flat washer for M10
(accessory)
Nut
(W3/8 or M10)
• The following parts is option.
Hanging Bolt - W 3/8 or M10
Nut
- W 3/8 or M10
Spring Washer - M10
Plate Washer - M10
CAUTION: Tighten the nut and
bolt to prevent unit falling.
150mm
Hanging bolt
(W3/8 or M10)
Air Conditioner body
Ceiling board
Keep the length of 15~18mm
between the air conditioner bottom
surface and the ceiling surface
Set screw of
paper model (4 pieces)
Paper model
for installation
Open the ceiling board
along the outer edge of the
paper model
• Drill the piping hole on the wall slightly tilted to the
outdoor side using a Ø 70 hole-core drill.
Wall
Indoor
Outdoor
Slope gradient for drain
Should be 1/50 ~ 1/100
Remote Controller Installation
• Although the room temperature sensor is in the indoor unit, the remote controller should be installed in
such places away from direct sunlight and high humidity.
Installation of the remote controller
• Select places that are not splashed with water.
• Select control position after receiving customer approval.
• The room temperature sensor is built in the indoor unit.
• This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult to
see.(The standard height is 1.2 ~ 1.5m high)
Routing of the remote controller cord
• Keep the remote controller cord away from the refrigerant piping and the drain piping.
• To protect the remote controller cord from electrical noise, place the cord at least 5cm away from other power
cables (audio equipment, television set, etc.)
• If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water
droplets from running.
Installation Manual 13
Installation
WIRED REMOTE CONTROL INSTALLATION
DISASSEMBLING
Front case
Th
• Separate the under plate from Remote control box.
el
ow
er
pa
rt
Lever carefully
the box open
using a screw
driver, etc.
Remote control
box body
• Fix the cord clamps on the wall by
ø 3 tapping screws (accessory).
• Fix the remote control cord.
• Fix the under plate on the wall
Face of wall
Cord clamp
(accessory)
Under plate
Screw (accessory)
ELECTRICAL WIRING
Main PCB
Be careful not to
exchange the color
of wires.
BR RD YL
White Connector
RD YL BR
Green Connector
REMOTE CONTROL PREPARATION
HOW TO MOUNT ONTO A WALL
HOW TO INSERT BATTERIES
1. Remove the battery cover from the remote controller.
• Slide the cover according to the arrow direction.
2. Insert the two batteries.
• Be sure that the (+) and (-) directions are correct.
• Be sure that both batteries are new.
3. Re-attach the cover.
• Slide it back into position.
14 Ceiling Cassette Air Conditioner
• Do not use rechargeable
batteries, such batteries differ
from standard dry cells in
shape, dimensions, and
performance.
• Romove the batteries from the
remote controller if the air
conditioner is not going to be
used for some long time.
Installation
Wiring Connection
• Open the control box cover and connect the Remote controller cord and Indoor power wires.
Indoor Outdoor
Connecting wire
Fire Prevention Cover
Cord Clip
Remote Control Cord
Connector fitting cover
Fire Prevention cover bolt
3Phase
36k/42k/48k/54k/60k
Heat Pump Model.
R
S
T
Terminal Block of Indoor Unit
1(L) 2(N)
3 4 5
Terminal Block of Outdoor Unit
1(L) 2(N) 3 4 5
N
POWER INPUT
1Phase
18k/24k/28k
Heat Pump Model.
Terminal Block of Indoor Unit
1(L) 2(N)
3 4 5
Terminal Block of Outdoor Unit
1(L) 2(N) 1(L) 2(N) 3 4
POWER INPUT
3Phase
36k/42k/48k/54k/60k
Cooling Model.
R
S
T
Terminal Block of Indoor Unit
1(L) 2(N)
3 4 5
Terminal Block of Outdoor Unit
1(L) 2(N)
3
N
POWER INPUT
1Phase
18k/24k/28k
Cooling Model.
Terminal Block of Indoor Unit
1(L) 2(N)
3 4 5
Terminal Block of Outdoor Unit
1(L) 2(N) 1(L) 2(N) 3 4
POWER INPUT
CAUTION
The power cord connected to the outdoor unit
should be complied with the following specifications
(Rubber insulation, type H05RN-F approved by HAR
or SAA).
GN
/YL
20
mm
Capacity
1 Phase
18k/24k/28k/30k
Btu/h
36kBtu/h
2.5mm2
2
5.5mm
42k/48k/54k/60k
Btu/h
8.5mm2
Capacity
3 Phase
1.25mm2
(H07RN-F)
36kBtu/h
GN
/YL
20
mm
42k/48k/54k/60k
Btu/h
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).
NORMAL
CROSS-SECTIONAL
AREA 0.75mm2 (18k/24k/36k)
(42k/48k/54k/60k)
GN
/YL
20
mm
3.5mm2
4 x 0.75
Cooling Only (Including Earth)
GN
/YL
Heat Pump
5 x 0.75
(Including Earth)
20
mm
If the supply cord is damaged, it must be replaced by a special cord or assembly available from the manufacturer
or its service agent.
WARNING: Make sure that the screws of the terminal are free from
looseness.
Attach insulation sleeve
Round crimp-style terminal
Electricwire
Connect wires of the same gauge to both sides
Installation Manual 15
Installation
ELECTRICAL WIRING
1. All wiring must comply with LOCAL REGULATIONS.
2. Select a power source that is capable of supplying the current required by the air conditioner.
3. Feed the power source to the unit via a distribution switch board designed for this purpose.
4. The terminal screws inside the control box may be loose due to vibration during transport.
Check the screws for loose connection.
(Running the air conditioner with loose connection can overload and damage electrical components.)
5. Always ground the air conditioner with a grounding wire and connector to meet the LOCAL REGULATION.
Main power source
Circuit Breaker
Use circuit breaker or time delay fuse.
Switch box
Refrigerant pipe
CONNECTING THE CABLE TO OUTDOOR UNIT
1. Remove the Cover control from the unit by loosening a screw.
Connect the wires to the terminals on the control board
individually as following.
2. Secure the cable onto the control board with the holder
(clamper).
3. Refix the cover control to the original position with the screw.
4. Use a recognized circuit breaker between the power source
and the unit.
a disconnecting device to adequately disconnect all supply
lines must be fitted.
Grade
Circuit
18k 24k 28k
36k 48k 54k
Bracker (A)
30
30
30
30
40
40
16 Ceiling Cassette Air Conditioner
Outdoor unit
Terminal block
Over 5mm
Holder for
power supply
cord
Power supply
cord
Connecting
cable
Cover control Holder for
connecting
cable
Installation
Connecting Pipes to the Indoor Unit
• Preparation of Piping
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the
following procedure.
Copper
tube
Slanted Uneven Rough
90°
1) Cut the pipes and the cable.
• Use the accessory piping kit or the pipes
purchased locally.
• Measure the distance between the indoor and
the outdoor unit.
• Cut the pipes a little longer than measured
distance.
• Cut the cable 1.5m longer than the pipe length.
Pipe
Reamer
Point down
2) Burrs removal
• Completely remove all burrs from the cut cross
section of pipe/tube.
• Put the end of the copper tube/pipe to downward
direction as you remove burrs in order to avoid to
let burrs drop in the tubing.
Flare nut
Copper tube
3) Putting nut on
• Remove flare nuts attached to indoor and
outdoor units, than put them on pipe/tube having
completed burr removal.
(Not possible to put them on after flaring work)
Handle
Bar
Bar
"A"
Yoke
Cone
4) Flaring work
• Carry out flaring work using flaring tool as shown
below.
Outside diameter
mm
inch
Ø6.35
1/4
Ø9.52
3/8
Ø12.7
1/2
Ø15.88
5/8
Ø19.05
3/4
A
mm
1.1~1.3
1.5~1.7
1.6~1.8
1.6~1.8
1.9~2.1
Copper pipe
Clamp handle
Smooth all round
Inside is shining without scratches
= Improper flaring =
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
5) Check
■ Compare the flared work with figure below.
■ If flare is noted to be defective, cut off the flared
section and do flaring work again.
• If the piping and the drain hose are in common
direction bundle the piping and the drain hose
together by wrapping them with vinyl tape.
Red arrow mark
Even length
all round
Inclined Surface Cracked Uneven
damaged
thickness
Indoor unit pipe
Connection pipe
Wrap with vinyl tape
Vinyl tape (wide)
Connecting cable
Pipe
Vinyl tape(narrow)
Installation Manual 17
Installation
Piping Connection
1. Form the piping according to its routing. Avoid bending and
bending back the same piping point more than three times.
(This will result in hardening the pipe.)
2. After deforming the piping, align centers of the union fitting of
the indoor unit and the piping, and tighten them firmly with
wrenches.
3. Connect pipe to the service valve or ball valve which is located
below the outdoor unit.
4. After completing the piping connection, be sure to check if
there is gas leakage in indoor and outdoor connection.
Liquid side
Indoor
unit
Outdoor
unit
Flare connection
Gas side
Flare connection
Vacuum drying
After completing the piping connection, execute vacuum drying for
the connecting piping and the indoor unit.
The vacuum drying must be carried out using the service ports of
both the liquid and gas side valves.
Grade
Liquid side piping Gas side piping
18kBtu/h
Ø6.35mm
Ø12.7mm
24kBtu/h
Ø6.35mm
Ø15.88mm
28kBtu/h
Ø6.35mm
Ø15.88mm
36kBtu/h
Ø6.35mm
Ø15.88mm
48kBtu/h
Ø9.52mm
Ø19.05mm
54kBtu/h
Ø9.52mm
Ø19.05mm
CAUTION: Use two wrenches and
tighten with regular torque.
Ø6.35mm
Ø9.52mm
Ø12.7mm
Ø15.88mm
Ø19.05mm
Flare nut fastening torque
1.8~2.5 kg.m
3.4~4.2 kg.m
5.5~6.6 kg.m
6.3~8.2 kg.m
9.9~12.1 kg.m
18 Ceiling Cassette Air Conditioner
Spanner
Torque
wrench
Installation
Installation of Decorative Panel
The decorative panel has its installation
direction.
Before installing the decorative panel,
always remove the paper template.
1. Temporarily fix two decorative panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by
amount 10mm in length.)
The fixing screws (hexagon M5 screw) are included the indoor unit box.
2. Remove the air inlet grille from the decorative panel. (Remove the hook for the air inlet grille cord.)
3. Hook the decorative panel key hole (
) on the screws fixed in step above, and slide the panel
so that the screws reach the key hole edge.
4. Retighten completely two temporarily fixed screws and other two screws. (Total 4 screws)
5. Connect the louver motor connector and display connector.
6. After tightening these screws, install the air inlet grille (including the air filter).
Piping side
Air conditioner unit
Decorative panel fixing screws
(hexagon M5 screws)
Temporally fitting at 2 places
(Tightening about 10mm)
Control box cover
Decorative panel
Key holes
Lead wire for
louver motor and
display
Decorative panel fixing screws
(Hexagon M5 screw)
Inlet Grille
Installation Manual 19
Installation
CAUTION: Install certainly the decorative panel.
Cool air leakage causes sweating.
Water drops fall.
Good example
Bad example
Air conditioner
unit
Air conditioner unit
Air
Cool air leakage
(no good)
Ceiling
board
Ceiling
board
Decorative
panel
Decorative panel
Fit the insulator (this part) and
be careful for cool air leakage
Indoor Unit Drain Piping
Pipe clamp
• 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 32mm.
Upward
routing
not allowed
Indoor unit
Maintenance
drain port
Piping material: Polyvinyl chloride pipe VP-25
and pipe fittings
1/50~1/100
MAX 700mm
• Be sure to execute 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:
Feed water
Flexible drain hose
(accessory)
Main
drain pipe
Drain Pump
Drain
port
Glue the joint
Drain hose connection
Use the clip (accessory)
• Connect the main drain pipe to the exterior and leave it
provisionally until the test comes to an end.
• Feed water to the flexible drain hose and check the piping for
leakage.
• Be sure to check the drain pump for normal operating and
noise when electrical wiring is complete.
• When the test is complete, connect the flexible drain hose to
the drain port on the indoor unit.
Drain pan
CAUTION: The supplied flexible
drain hose should not be curved,
neither screwed. The curved or screwed
hose may cause a leakage of water.
20 Ceiling Cassette Air Conditioner
Flexible drain hose
1/50~1/100
MAX 700mm
Installation
HEAT INSULATION
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance
(over 120°C).
Fastening band
(accessory)
2. Precautions in high humidity circumstance:
This air conditioner has been tested
according to the "KS Standard Conditions
with Mist" and confirmed that there is not any
default. However, if it is operated for a long
Refrigerant piping
time in high humid atmosphere (dew point
temperature: more than 23°C), water drops
Indoor unit
are liable to fall. In this case, add heat
Thermal insulator
insulation material according to the following
(accessory)
procedure:
• Heat insulation material to be prepared... Adiabatic EPDM or NBR with thickness 10 to 20mm.
• Stick EPDM or NBR on all air conditioners that are located in ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more than 8mm) for refrigerant piping (gas
piping: thick piping) and drain piping, add further 10mm to 30mm thickness material.
FORM THE PIPINGS
1. Wrap the connecting portion of indoor
unit with the Insulation material and
secure it with two Plastic Bands. (for the
right pipings)
• If you want to connect an additional drain
hose, the end of the drain-outlet should keep
distance from the ground. (Do not dip it into
water, and fix it on the wall to avoid swinging
in the wind.)
In case of the Outdoor unit being installed
below position of the Indoor unit.
Seal a small opening
around the pipings
with gum type sealer.
Drain hose
Taping
Pipings
Plastic Band
Connecting
cable
Power supply
cord
2. Tape the Pipings, drain hose and
Connecting Cable from bottom to top.
3. Form the pipings gathered by taping
along the exterior wall and fix it onto the
wall by saddle or equivalent.
Trap is required to prevent water from entering
into electrical parts.
Installation Manual 21
Installation
In case of the Outdoor Unit being
installed above position of the Indoor
Unit.
Seal a small opening
around the pipings
with gum type sealer.
4. Tape the Pipings and Connecting cable
from bottom to top.
Trap
5. Form the pipings gathered by taping along
the exterior wall, and make the trap
prevent water from entering into the room.
6. Fix the pipings onto the wall by saddle or
equivalent.
Air Purging
Air purging
The air and moisture remaining in the refrigerant system have undesirable effects as indicated below.
1. Pressure in the system rises.
2. Operating current rises.
3. Cooling(or heating) efficiency drops.
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.
5. Water may lead to corrosion of parts in the refrigeration system.
Therefore, after evacuating the system, take a leak test for the piping and tubing between the
indoor and outdoor unit.
Air purging with vacuum pump
1. Check that both liquid and gas pipe between indoor and outdoor have been properly
connected.
2. Remove the service valve cap from both the gas and liquid side on the outdoor unit.
3. Confirm that both the liquid and gas side valve are set to the closed position.
4. Connect the manifold valve(with pressure gauge) to the gas pipe side.
CAUTION:
: Be sure to use a manifold valve for
air purging. If it is not available, use
a stop valve for this purpose. The
"Hi" knob of the manifold valve
must always be kept close.
5. And connect the Nitrogen cylinder to the
service port with charge hoses to the
manifold gauge.
6. Pressurize the system to no more than 150
P.S.I.G with dry nitrogen gas. Close the
nitrogen cylinder valve when it shows
reading of 150 P.S.I.G.
22 Ceiling Cassette Air Conditioner
Indoor unit
Manifold valve
Pressure
gauge
Lo
Hi
Outdoor unit
Charge hose
Nitrogen gas
cylinder(in vertical
standing position)
CAUTION:
To avoid nitrogen entering the refrigerant system in a liquid state, the top of the
cylinder must be higher than its bottom when you pressurize the system. Usually, the
cylinder is used in a vertical standing position.
7. Check for leakage with Liquid soap solution. Do the leakage test at all joints of tubing (indoor and
outdoor) and on the service valve (both gas and liquid side).
Soap water method
1. Remove the caps from the 2-way and 3-way valves.
2. Remove the service-port cap from the 3-way valve.
3. To open the 2-way valve turn the valve stem
counterclockwise approximately 90°, wait for about
2~3 sec, and close it.
4. Apply a soap water or a liquid neutral detergent on
the indoor unit connection or outdoor unit
connections by a soft brush to check for leakage of
the connecting points of the piping.
5. If bubbles come out, the pipes have leakage
Liquid side
Gas side
2-way valve
(Open)
3-way valve
(Close)
Hexagonal wrench
Evacuation
1. If the system is found free from all leakages,
relive the nitrogen pressure by loosening the
charge hose connector at nitrogen cylinder.
Disconnect the hose from cylinder when
pressure reaches to normal state.
2. Evacuation: Connect the charge hose end to the
vacuum pump and evacuate the connecting of
the and indoor unit. Check that the “Lo” knob of
manifold is open. Run the vacuum pump.
Confirm the "Lo" knob of the manifold valve is
open. Then, run the vacuum pump.
The operation time for evacuation varies with
tubing length and capacity of the pump.
• The degree of vacuum should be under 0.8 Torr.
• When the desired vacuum is reached, close the
"Lo" knob of the manifold valve and stop the
vacuum pump.
Cap
Indoor unit
Outdoor unit
Manifold valve
Lo
Vaccum
gauge
Hi
Open
Close
Vacuum pump
Installation Manual 23
3. Once the desired vacuum is created. Disconnect the vacuum pump and open the liquid side valve stem
by turning it to counter-clockwise direction with service valve wrench.
4. Open completely the gas side valve buy turning to counter-clockwise with service valve wrench.
5. Remove slowly the charge hose connected to the gas side service port (to release the pressure).
6. Replace back the flare nut and its bonnet on the gas side service port. Fasten the flare nut with
adjustable wrench to prevent any leakage from the system.
7. Fasten back the valve cap on both gas and liquid side service valves.
Test running
1) PRECAUTIONS IN TEST RUN
• The initial power supply must provide at least 90% of the rated voltage.
Otherwise, the air conditioner should not be operated.
CAUTION:
For test run, carry out the cooling operation firstly even during heating season. If heating
operation is carried out firstly, it leads to the trouble of compressor. Then attention must be paid.
Carry out the test run more than 5 minutes without fail.
(Test run will be cancelled 18 minutes later automatically)
• The test run is started by pressing the room temperature checking button and down timer button for 3
seconds at the same time.
• To cancel the test run, press any button.
CHECK THE FOLLOWING ITEMS WHEN INSTALLATION IS COMPLETED
• After completing work, be sure to measure and record trial run properties, and store measured data, etc.
• Measuring items are room temperature, outside temperature, suction temperature, blow out temperature,
wind velocity, wind volume, voltage, current, presence of abnormal vibration and noise, operating pressure,
piping temperature, compressive pressure.
• As to the structure and appearance, check following items.
❏ Is the circulation of air adequate?
❏ Is the draining smooth?
❏ Is the heat insulation complete
(refrigerant and drain piping)?
❏ Is there any leakage of refrigerant?
❏ Is the remote controller switch operated?
❏ Is there any faulty wiring?
❏ Are not terminal screws loosened?
M4......118N.cm{12kgf.cm} M5......196N.cm{20kgf.cm}
M6......245N.cm{25kgf.cm} M8......588N.cm{60kgf.cm}
2) Connection of power supply
1. Connect the power supply cord to the independent power supply.
• Circuit breaker is required.
2. Operate the unit for 15 minutes or more.
24 Ceiling Cassette Air Conditioner
Installation
3) Evaluation of the performance
1. Measure the temperature of the intake
and discharge air.
2. Ensure the difference between the intake
temperature and the discharge one is
more than 8°C (Cooling) or reversely
(Heating).
Thermometer
CAUTION
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method
of wiring, be guided by 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) 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.
• Proper starting power is not given to the compressor.
HAND OVER
Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning,
temperature control, etc.).
Installation Manual 25
Installation
Optional Operation
Two Thermistor System
(1) Open the rear cover of the wired remote-controller to set the mode.
(2) Select one of three selectable modes as follows.
• Position 1:
The room temperature is controlled by the thermistor of the main body.
• Position 2:
The room themperature is controlled by the thermistor of the wired remote-controller, control the
temperature according to the position of wired remote-controller.
• Position 3:
The room temperature is controlled by lower temperature between the temperature of main body and of
remote-controller sensor.
(3) Move the slide switch to set position.
Room Temp. sensor
Slide switch for 2 Thermistor
TH
R14H OP3
SW TH
REMO
MAIN
2TH
OP2
REMO
MAIN
2TH
R12H
CO1H
OP1
R19H
R11H
OP5R16H
OP4
R15H
OP7
R18H
R17H
OP6
LO
STAND
C070
Position 2
Position 1
Position 3
R13H
R03S
HI
R04S
HIGH
R01S
R02S
SW
Slide switch for ceiling height
(4) Close the rear cover and check if it works normally.
CAUTION:
• Select the position after counselling with a customer.
• In case of cooling mode, room temperature is controlled by the main
body sensor.
• To control the room temperature by a wired remote controller, install
controller(room temp. sensor) to sense the temperature more
accurately.
• Maunfactured in the position 3.
26 Ceiling Cassette Air Conditioner
Installation
Adjusting air volume to the height of ceiling
You can choose the RPM(or air volume) of indoor motor according to the height of ceiling to supply the
comfortable atmosphere to consumers.
Procedure
1. Choose the selectable position in the table after measuring the height of ceiling.
Ceiling height
more than 3.3m
2.7~3.3m
Mode of slide switch
High Ceiling
Standard
Change of air volume
Increasing
-
less than 2.7m
Low Ceiling
Decreasing
Remark
Maunfactured in
standard mode
2. In the case of changing the height as "high" or "low", open the rear cover of the wired remotecontroller.
3. Move the slide switch to the set position.
Slide switch for 2 Thermistor
TH
Low ceiling
Standard
(Default)
High Ceiling
Lo
R14H OP3
SW TH
STAND
R13H
OP2
REMO
MAIN
2TH
Hi
R12H
CO1H
OP1
R19H
R11H
OP5R16H
OP4
R15H
OP7
R18H
R17H
OP6
C070
LO
STAND
R03S
HI
R04S
SW
HIGH
R01S
R02S
Slide switch for ceiling height
4. Close the rear cover and check if it works nomally.
Installation Manual 27
Installation
Group Control(Optional Wiring)
It operates maximum 16 Units by only one Wired Remote Controller, and each Unit starts sequentially to
prevent overcurrent.
Main PCB
RED(12V)
YL(SIGNAL)
BR(GND)
Indoor Unit 1
Indoor Unit 2
Terminal(Local Supply)
Block
Connector
Terminal(Local Supply)
Block
Connector
RED(12V)
YL(SIGNAL)
BR(GND)
Main PCB
#1
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Indoor Unit 16
Terminal(Local Supply)
Block
Connector
Main PCB
#2
....
AUTO SWING
OPERATION
SET TEMP
Room Temp
Operation unit
03
FAN SPEED
HI
MED
LO
Time
Timer
On Off
Set no. Time 01
ZONE
....
YL(SIGNAL)
BR(GND)
YL(SIGNAL)
BR(GND)
Main PCB
#16
Connecting Cable(Local Supply)
SUB FUNCTION
AUTO Heater Preheat
JET Defrost Humidify
Filter Out door
1 2 3 4
Program set
05
07
09
11
13
15
17
19
21
23
Wired Remote Controller
(Standard)
Slide Switch2
Single
Group
Remote
Controller
PCB
• Using the supplied Wired Remote Controller, wire
them like above.
• Move slide switch 2 to "Group" position.
• Ensure that the color of wire.
CAUTION:
• Be careful not to exchange the color of wires.
• The maximum length of connecting wire should be below 200m(25Ω)
on connecting each units.
• Use a wire more than 0.5mm2
28 Ceiling Cassette Air Conditioner
Installation
Installation guide at the seaside
CAUTION:
1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion
on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient performance.
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise it
needs additional anticorrosion treatment on the heat exchanger.
Selecting the location(Outdoor Unit)
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.
Install the outdoor unit on the opposite side of the sea wind direction.
Sea wind
Sea wind
2) In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind.
Windbreak
• It should be strong enough like concrete to prevent
the sea wind from the sea.
• The height and width should be more than 150% of
the outdoor unit.
Sea wind
• It should be keep more than 70 cm of space
between outdoor unit and the windbreak for easy
air flow.
3) Select a well-drained place.
1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment.
2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water
Installation Manual 29
Memo
30 Ceiling Cassette Air Conditioner