LG | LTUC246FLA0 | Owner's Manual | LG LTUC246FLA0 Owner's Manual

LG LTUC246FLA0 Owner's Manual
LG
LG Cassette Type
Air Conditioner
INSTALLATION MANUAL
IMPORTANT
• Please read this installation manual completely before
installing the product.
• When the power cord is damaged, replacement work shall
be performed by authorized personnel only.
• 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.
Cassette Type 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 ........................................6
Symbols used in this Manual..........6
Features ...........................................6
Installation ..........................................7
❏ Electric drill
❏ Hanging Bolt
(W 3/8 or M10 length 650mm)
❏ Hole core drill (ø70mm)
❏ Insulated drain hose
❏ Flaring Tools set
❏ Additional Drain hose
(Inner Dia.............32mm)
❏ Torque Wrenches
❏ Hexagonal Wrench (4mm, 5mm)
Installation Tools...............................7
❏ Gas-leak detector
Installation of Indoor, Outdoor
Unit .................................................8
❏ Owner’s Manual
Test running .................................20
Optional operation ....................22
2 Cassette Type 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.
For electrical work, contact the
dealer, seller, a qualified
electrician, or an Authorized
Service Center.
Always ground the product.
• There is risk of fire or
electric shock.
• Do not disassemble or repair
the product. There is risk of
fire or electric shock.
• There is risk of fire or
electric shock.
Install the panel and the cover of
control box securely.
Always install a dedicated
circuit and breaker.
Use the correctly rated breaker
or fuse.
• There is risk of fire or
electric shock.
• Improper wiring or
installation may cause fire or
electric shock
• There is risk of fire or
electric shock.
Installation Manual 3
Safety Precautions
Do not modify or extend the power cable.
Be cautious when unpacking and installing the
product.
• There is risk of fire or electric shock.
• 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.
Do not install the product on a defective
installation stand.
• There is risk of fire, electric shock, explosion,
or injury.
• It may cause injury, accident, or damage to
the product.
Be sure the installation area does not
deteriorate with age.
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.
• If the base collapses, the air conditioner could fall with
it, causing property damage, product failure, and
personal injury.
• Moisture may condense and wet or damage
furniture.
■ Operation
Do not store or use flammable gas or combustibles
near the product.
• There is risk of fire or failure of product.
Gasolin
4 Cassette Type Air Conditioner
Safety Precautions
■ Installation
Always check for gas (refrigerant) leakage after
installation or repair of product.
Install the drain hose to ensure that water is
drained away properly.
• Low refrigerant levels may cause failure of
product.
• A bad connection may cause water leakage.
Keep level even when installing the product.
Do not install the product where the noise or hot air
from the outdoor unit could damage the
neighborhoods.
• To avoid vibration or water leakage.
• 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.
Installation Manual 5
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
Anti-bacteria filter
Air
Intake
Air Outlet
6 Cassette Type 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 7
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
8 Cassette Type Air Conditioner
Installation
3) Piping length and the elevation
Pipe Size
(Diameter:Ø)
Gas
Liquid
Standard
Max.
Standard
Max.
*Additional
refrigerant
(g/m)
18K Btu/h
5/8"
1/4"
7.5
30
5
30
30
24K Btu/h
5/8"
1/4"
7.5
30
5
30
30
Capacity
Length A(m)
Elevation B(m)
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 5m
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 9
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.
790 (Ceiling opening)
572(Hanging bolt)
109
744 Unit size
66
744 Unit size
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.
790 (Ceiling opening)
66
109
658 (Hanging bolt)
• 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 wall.
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.
10 Cassette Type Air Conditioner
Installation
The Indoor Unit Installation
Ceiling
Spring washer
(M10)
Flat washer for M10
(accessory)
Ceiling board
Flat washer for M10
(accessory)
Nut
(W3/8 or M10)
Air Conditioner body
Ceiling board
Paper model
for installation
Adjust the same height
• 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
Nut
(W3/8 or M10)
Keep the length of the bolt
from the bracket to 40mm
Set screw of
paper model (4 pieces)
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
5~7mm
Hanging bolt
(W3/8 or M10)
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 11
Installation
WIRED REMOTE CONTROL INSTALLATION
DISASSEMBLING
Front case
Th
• Separate the under plate from Remote control box.
el
ow
er
pa
rt
Remote control
box body
Lever carefully
the box open
using a screw
driver, etc.
• Fix the under plate on the wall
• Fix the cord clamps on the wall by
ø 3 tapping screws (accessory).
• Fix the remote control cord.
Face of wall
Cord clamp
(accessory)
Under plate
Screw (accessory)
ELECTRICAL WIRING
Remote controller
(Main board)
CN REMO
Wire and make sure that teminal
numbers are matched on unit side and
remote controller side.
The maximum length of the cord is 100m.
If the length of the cord exceeds 50m,
2
use a wire size greater than 0.5mm .
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.
12 Cassette Type 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
power cord
Control box cover
Remote
controller
cord
[Air inlet side view]
Control box cover
fitting screw(2 units)
1Phase, 18K, 24K
Cooling Model.
Terminal Block of Indoor Unit
3(L) 4(N)
5 6 7
1(L) 2(N)
Terminal Block of Outdoor Unit
3(L) 4(N)
5 6 7
8
Power Cord
Terminal Block of Outdoor Unit
L N 1(L) 2(N) 3
Terminal Block of Iutdoor Unit
1(L) 2(N)
3 4 5
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
NORMAL
CROSS-SECTIONAL
AREA 0.75mm2 (18K/24K/36K)
1 Phase 3 Phase
18K/24K/28K/30K
2.5mm2
BTU/h
7.5mm
8.5mm
Capacity
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).
GN
/YL
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.
Installation Manual 13
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.
Outdoor unit
2. Secure the cable onto the control board with the holder
(clamper).
Holder for
power supply
cord
Terminal block
Over 5mm
3. Refix the cover control to the original position with the
screw.
4. Use a recongnized circuit breaker 20A between the
power source and the unit. A disconnection device to
adequately disconnect all supply lines must be fitted.
14 Cassette Type Air Conditioner
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)
4) Flaring work
Handle
Bar
Bar
"A"
Yoke
• Carry out flaring work using flaring tool as
shown below.
Outside diameter
A
mm
inch
mm
Ø6.35
1/4"
1.1~1.3
Ø9.52
3/8"
1.5~1.7
Ø12.7
1/2"
1.6~1.8
Ø15.88
5/8"
1.6~1.8
Ø19.05
3/4"
1.9~2.1
Firmly hold copper tube in a bar(or die) as
indicated dimension in the table above.
Cone
Copper pipe
Clamp handle
Red arrow mark
Smooth all round
Inside is shining without scratches
= Improper flaring =
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.
Even length
all round
Inclined Surface Cracked Uneven
damaged
thickness
Installation Manual 15
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.
Model
Liquid side piping Gas side piping
18K, 24K, 28K Btu/h
Ø 6.35mm
Ø15.88mm
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 kgf.m
3.4~4.2 kgf.m
5.5~6.6 kgf.m
6.3~8.2 kgf.m
9.9~12.1 kgf.m
16 Cassette Type Air Conditioner
Union
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
Louver motor
Decorative panel
Display
Key holes
Lead wire for
louver motor and
display
Decorative panel fixing screws
(Hexagon M5 screw)
Inlet Grille
Installation Manual 17
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.
18 Cassette Type 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
Refrigerant piping
any default. However, if it is operated for a
long time in high humid atmosphere (dew Indoor unit
Thermal insulator
point temperature: more than 23°C), water
(accessory)
drops are liable to fall. In this case, add
heat insulation material according to the
following procedure:
• Heat insulation material to be prepared... Adiabatic glass wool with thickness 10 to 20mm.
• Stick glass wool 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.)
Seal a small opening
around the pipings
with gum type sealer.
Drain hose
Taping
Pipings
In case of the Outdoor unit being installed
below position of the Indoor unit.
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 19
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.
2. Tape the Pipings and Connecting cable
from bottom to top.
Trap
3. Form the pipings gathered by taping along
the exterior wall, and make the trap
prevent water from entering into the room.
4. Fix the pipings onto the wall by saddle or
equivalent.
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}
20 Cassette Type Air Conditioner
Installation
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.
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 21
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.
22 Cassette Type 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 4.0m
3.2~4.0m
Mode of slide switch
High Ceiling
Standard
Change of air volume
Increasing
-
less than 3.2m
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 23
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
24 Cassette Type Air Conditioner
Memo
Installation Manual 25
Memo
26 Cassette Type Air Conditioner
P/No.: 3828A10001P
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