LG ARUN072BT3 Owner's manual

ENGLISH
FRANÇAIS
ESPAÑOL
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.your set and retain it for future reference.
MODELS : ARUN Series
www.lg.com
P/NO : MFL67221404
IMPORTANT!
Please read this instruction sheet completely before installing the product.
This air conditioning system meets strict safety and operating standards. As the installer or service person,
it is an important part of your job to install or service the system so it operates safely and efficiently.
WARNING
• Installation or repairs made by unqualified persons can result in hazards to you and others.
Installation of all field wiring and components MUST conform with local building codes or, in the absence of local
codes, with the National Electrical Code 70 and the National Building Construction and Safety Code or Canadian
Electrical code and National Building Code of Canada.
• The information contained in the manual is intended for use by a qualified service technician familiar with safety
procedures and equipped with the proper tools and test instruments.
• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property
damage, personal injury and/or death.
CAUTION: Improper installation, adjustment, alteration, service or maintenance can void the warranty.
The weight of the condensing unit requires caution and proper handling procedures when lifting
or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.
Safety Precautions
• Always wear safety eye wear and work gloves when installing equipment.
• Never assume electrical power is disconnected. Check with meter and equipment.
• Keep hands out of fan areas when power is connected to equipment.
• R-410A causes frostbite burns.
• R-410A is toxic when burned.
NOTE TO INSTALLING DEALER: The Owners Instructions and Warranty are to be given to the owner
or prominently displayed near the indoor Furnace/Air Handler Unit.
Special warnings
When wiring:
Electrical shock can cause severe personal injury or death. Only a qualified,
experienced electrician should attempt to wire this system.
• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these
instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.
• Ground the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.
• The choice of materials and installations must comply with the applicable local/national or international standards.
When transporting:
Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and
bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on
the air conditioner can cut your finger.
When installing...
... in a wall: Make sure the wall is strong enough to hold the unit's weight.
It may be necessary to construct a strong wood or metal frame to provide added support.
... in a room: Properly insulate any tubing run inside a room to prevent "sweating" that can cause
dripping and water damage to wall and floors.
... in moist or uneven locatinons: Use a raised concrete pad or concrete blocks provide a solid,
level foundation for the outdoor unit. This prevents water damage and abnormal vibration.
... in an area with high winds: Securely anchor the outdoor unit down with bolts and a metal
frame. Provide a suitable air baffle.
... in a snowy area(for Heat Pump Model): Install the outdoor unit on a raised platform that is
higher than drifting snow. Provide snow vents.
When connecting refrigerant tubing
• Keep all tubing runs as short as possible.
• Use the flare method for connecting tubing.
• Check carefully for leaks before starting the test run.
When servicing
• Turn the power OFF at the main power box(mains) before opening the unit to check or repair
electrical parts and wiring.
• Keep your fingers and clothing away from any moving parts.
• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have
been left inside the unit being serviced.
2
Outdoor Unit
ARUN Series Outdoor unit Installation Manual
TABLE OF CONTENTS
Safety Precautions .................................................................................4
Installation Process................................................................................8
Outdoor units Information .....................................................................9
Environment-friendly Alternative Refrigerant R410A .......................14
Select the Best Location......................................................................15
Installation Space .................................................................................16
Lifting method.......................................................................................18
Installation.............................................................................................19
Refrigerant piping installation.............................................................24
Pipe connections between indoor and outdoor unit.........................28
Electrical Wiring ...................................................................................54
Test Run.................................................................................................81
New Function .....................................................................................101
Caution For Refrigerant Leak ............................................................109
Installation guide at the seaside........................................................111
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.
n 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 to properties only.
n Meanings of symbols used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
n Installation
Have all electric work done by a licensed
electrician according to "Electric Facility Engineering Standard" and "Interior Wire Regulations" and the instructions given in this
manual and always use a special circuit.
• If the power source capacity is inadequate or
electric work is performed improperly, electric
shock or fire may result.
Always ground the product.
• There is risk of fire or electric shock.
For re-installation of the installed product, always contact a dealer or an Authorized Service Center.
• There is risk of fire, electric shock, explosion, or
injury.
Do not store or use flammable gas or
combustibles near the air conditioner.
• There is risk of fire or failure of product.
Ask the dealer or an authorized technician to
install the air conditioner.
• Improper installation by the user may result in
water leakage, electric shock, or fire.
Always intstall a dedicated circuit and breaker.
• Improper wiring or installation may cause fire or
electric shock.
Do not install, remove, or re-install the unit
by yourself (customer).
• There is risk of fire, electric shock, explosion, or
injury.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Prepare for strong wind or earthquake and
install the unit at the specified place.
Do not install the product on a defective installation stand.
• Improper installation may cause the unit to topple and result in injury.
• It may cause injury, accident, or damage to the
product.
4
Outdoor Unit
Safety Precautions
• If a different refrigerant or air is mixed with the
original refrigerant, the refrigerant cycle may
malfunction and the unit may be damaged.
Ventilate before operating air conditioner
when gas leaked out.
• It may cause explosion, fire, and burn.
Do not reconstruct to change the settings of
the protection devices.
• If the pressure switch, thermal switch, or other
protection device is shorted and operated
forcibly, or parts other than those specified by
LGE are used, fire or explosion may result.
Securely install the cover of control box and
the panel.
• If the cover and panel are not installed securely,
dust or water may enter the outdoor unit and fire
or electric shock may result.
If the air conditioner is installed in a small room, measures must be taken to prevent the
refrigerant concentration from exceeding the safety limit when the refrigerant leaks.
• Consult the dealer regarding the appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of
oxygen in the room could result.
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.
n Operation
Do not damage or use an unspecified power
cord.
• There is risk of fire, electric shock, explosion, or
injury.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product
damage.
When the product is soaked (flooded or
submerged), contact an Authorized Service
Center.
• There is risk of fire or electric shock.
Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock.
Do not touch the power switch with wet
hands.
• There is risk of fire, electric shock, explosion, or
injury.
Be cautious not to touch the sharp edges
when installing.
• It may cause injury.
Take care to ensure that nobody could step
on or fall onto the outdoor unit.
Do not open the inlet grille of the product
during operation. (Do not touch the electrostatic filter, if the unit is so equipped.)
• This could result in personal injury and product
damage.
• There is risk of physical injury, electric shock, or
product failure.
Installation Manual 5
ENGLISH
When installing and moving the air conditioner to another site, do not charge it with a
different refrigerant from the refrigerant
specified on the unit.
Safety Precautions
n Installation
Always check for gas (refrigerant) leakage
after installation or repair of product.
• Low refrigerant levels may cause failure of
product.
Keep level even when installing the product.
• To avoid vibration or water leakage.
Use power cables of sufficient current
carrying capacity and rating.
• Cables that are too small may leak, generate
heat, and cause a fire.
Keep the unit away from children. The heat
exchanger is very sharp.
• It can cause the injury, such as cutting the finger.
Also the damaged fin may result in degradation
of capacity.
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.
Do not install the unit where combustible gas
may leak.
• If the gas leaks and accumulates around the
unit, an explosion may result.
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.
When installting the unit in a hospital, communication station, or similar place, provide
sufficient protection against noise.
• The inverter equipment, private power generator, highfrequency medical equipment, or radio communication
equipment may cause the air conditioner to operate erroneously, or fail to operate. On the other hand, the air
conditioner may affect such equipment by creating noise
that disturbs medical treatment or image broadcasting.
Do not install the product where it is 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.
n Operation
Do not use the air conditioner in special
environments.
• Oil, steam, sulfuric smoke, etc. can significantly reduce
the performance of the air conditioner or damage its parts.
Make the connections securely so that the outside
force of the cable may not be applied to the terminals.
• Inadequate connection and fastening may generate heat and cause a fire.
Do not block the inlet or outlet.
• It may cause failure of appliance or accident.
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, or personal injury.
Install and insulate the drain hose to ensure that water is drained away properly based on the
installation manual.
• A bad connection may cause water leakage.
6
Outdoor Unit
Safety Precautions
Be very careful about product transportation.
Safely dispose of the packing materials.
• Packing materials, such as nails and other metal or
wooden parts, may cause stabs or other injuries.
• Tear apart and throw away plastic packaging bags
so that children may not play with them. If children
play with a plastic bag which was not torn apart,
they face the risk of suffocation.
Do not touch any of the refrigerant piping
during and after operation.
• It can cause a burn or frostbite.
Do not directly turn off the main power
switch after stopping operation.
• Wait at least 5 minutes before turning off the
main power switch. Otherwise it may result in
water leakage or other problems.
Use a firm stool or ladder when cleaning or
maintaining the air conditioner.
• Be careful and avoid personal injury.
Turn on the power at least 6 hours before
starting operation.
• Starting operation immediately after turning on
the main power switch can result in severe
damage to internal parts. Keep the power switch
turned on during the operational season.
Do not operate the air conditioner with the
panels or guards removed.
• Rotating, hot, or high-voltage parts can cause injuries.
Auto-addressing should be done in condition of
connecting the power of all indoor and outdoour
units. Auto-addressing should also be done in
case of changing the indoor unit PCB.
Do not insert hands or other objects through
the air inlet or outlet while the air conditioner
is plugged in.
• There are sharp and moving parts that could
cause personal injury.
Installation Manual 7
ENGLISH
• Only one person should not carry the product if it weighs more than 44lbs (20kg).
• Some products use PP bands for packaging. Do not use any PP bands for a means of transportation.
It is dangerous.
• Do not touch the heat exchanger fins. Doing so may cut your fingers.
• When transporting the outdoor unit, suspending it at the specified positions on the unit base. Also
support the outdoor unit at four points so that it cannot slip sideways.
Installation Process
Installation Process
Determination of division work
Preparation of contract drawings
Sleeve and insert work
Installation of indoor unit
Indicate clearly who will be responsible for switch setting.
Make connection clearly between outdoor, indoor, remote controller and option.
Take account of gradient
of drain piping
Check model name to make
sure the fitting is made correctly
Refrigerant piping work
Special attention to dryness,
cleanness and tightness
Drain pipe work
Adjust to downward gradient
Duct work
Make sure airflow is sufficient
Heat insulation work
Electrical work
(connection circuits and drive circuits)
Airtight test
Outdoor unit foundation work
Installation of outdoor unit
The foundation must be level even
Avoid short circuits and ensure
sufficient space is allowed for service
Make sure no gaps are left where
the insulating materials are joined
Multiple core cable must not be used.
(suitable cable should be selected)
In the final check for 24hours at 3.8MPa(551psi) there must be no drop in pressure.
Vacuum drying
The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour
Additional charge of refrigerant
Recharge correctly as calculated in this manual. and record the amount of added refrigerant
Fit facing panels
Automatic addressing of indoor unit
Test run adjustment
Transfer to customer with explanation
Make sure there are no gaps left between the facing materials used on the ceiling
Refer to automatic addressing flowchart
Preheat the crank case with the electrical heater for more than 6 hours.
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Explain the use of the system as clearly as possible to your customer and make sure all relevant
documentation is in order
• The above list indicates the order in which the individual work operations are normally carried out but this order may be
varied where local conditions warrants such change.
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure
3.8MPa(551psi).
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.(If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.)
8
Outdoor Unit
Outdoor units Information
ENGLISH
Outdoor units Information
n Combination Ration(50~130%)
Outdoor Number
Single outdoor unit
Double outdoor units
Triple outdoor units
Connection Capacity
130%
130%
130%
Notes: * We can guarantee the operation only within 130% Combination.
Power Supply: Outdoor Unit (3Ø, 208/230V, 60Hz)
n Heat pump
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Dimensions
mm
inch
(WxHxD)
Connecting
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
Pipes
Product Charge
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
mm
inch
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
8
6
ARUN072BT3
ARUN072BT3
1 Outdoor Unit
10
8
ARUN096BT3
ARUN096BT3
12
10
ARUN121BT3
ARUN121BT3
5.5
12.1
13
190 x 1
418 x 1
(920×1,680×760)×1
(36.2×66.1×29.9)×1
9.52(3/8)
19.05(3/4)
9.4
20.7
16
280 × 1
617 × 1
(1,240×1,680×760)×1
(48.8×66.1×29.9)×1
9.52(3/8)
22.2(7/8)
9.4
20.7
20
280 × 1
617 × 1
(1,240×1,680×760)×1
(48.8×66.1×29.9)×1
12.7(1/2)
28.58(1 1/8)
1 Outdoor Unit
14
12
ARUN144BT3
ARUN144BT3
9.4
20.7
23
280 × 1
617 × 1
(1,240×1,680×760)×1
(48.8×66.1×29.9)×1
12.7(1/2)
28.58(1 1/8)
2 Outdoor Unit
18
20
14
16
ARUN168BT3
ARUN192BT3
ARUN072BT3
ARUN072BT3
ARUN096BT3
ARUN121BT3
14.9
32.8
26
(190 × 1) + (280 × 1)
(418 × 1) + (617 × 1)
(920×1,680×760)×1
(1,240×1,680×760)×1
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×1
15.88(5/8)
28.58(1 1/8)
14.9
32.8
29
(190 × 1) + (280 × 1)
(418 × 1) + (617 × 1)
(920×1,680×760)×1
(1,240×1,680×760)×1
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×1
15.88(5/8)
28.58(1 1/8)
Installation Manual 9
Outdoor units Information
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
mm
inch
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
mm
inch
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
10
mm
inch
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
Outdoor Unit
22
18
ARUN216BT3
ARUN072BT3
ARUN144BT3
14.9
32.8
32
(190 × 1) + (280 × 1)
(418 × 1) + (617 × 1)
(920×1,680×760)×1
(1,240×1,680×760)×1
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×1
15.88(5/8)
28.58(1 1/8)
2 Outdoor Unit
28
24
ARUN288BT3
ARUN144BT3
ARUN144BT3
19
41
42
280 × 2
617 × 2
(1,240×1,680×760)×2
(48.8×66.1×29.9)×2
19.05(3/4)
34.9(1 3/8)
1 Outdoor Unit
36
30
ARUN360BT3
ARUN072BT3
ARUN144BT3
ARUN144BT3
24.3
53.5
52
(190 × 1) + (280 × 2)
(418 × 1) + (617 × 2)
(920×1,680×760)×1
(1,240×1,680×760)×2
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×2
19.05(3/4)
41.3(1 5/8)
2 Outdoor Unit
24
20
ARUN240BT3
ARUN096BT3
ARUN144BT3
26
22
ARUN264BT3
ARUN121BT3
ARUN144BT3
19
41
35
280 × 2
617 × 2
(1,240×1,680×760)×2
19
41
39
280 × 2
617 × 2
(1,240×1,680×760)×2
(48.8×66.1×29.9)×2
(48.8×66.1×29.9)×2
15.88(5/8)
34.9(1 3/8)
19.05(3/4)
34.9(1 3/8)
3 Outdoor Unit
32
34
26
28
ARUN312BT3
ARUN336BT3
ARUN072BT3
ARUN072BT3
ARUN096BT3
ARUN121BT3
ARUN144BT3
ARUN144BT3
24.3
24.3
53.5
53.5
45
49
(190 × 1) + (280 × 2)
(190 × 1) + (280 × 2)
(418 × 1) + (617 × 2)
(418 × 1) + (617 × 2)
(920×1,680×760)×1
(920×1,680×760)×1
(1,240×1,680×760)×2
(1,240×1,680×760)×2
(36.2×66.1×29.9)×1
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×2
(48.8×66.1×29.9)×2
19.05(3/4)
19.05(3/4)
34.9(1 3/8)
34.9(1 3/8)
2 Outdoor Unit
38
40
32
34
ARUN384BT3
ARUN408BT3
ARUN096BT3
ARUN121BT3
ARUN144BT3
ARUN144BT3
ARUN144BT3
ARUN144BT3
28.2
28.2
62.1
62.1
55
58
280 × 3
280 × 3
617 × 3
617 × 3
(1,240×1,680×760)×3
(1,240×1,680×760)×3
(48.8×66.1×29.9)×3
(48.8×66.1×29.9)×3
19.05(3/4)
41.3(1 5/8)
19.05(3/4)
41.3(1 5/8)
Outdoor Units Information
Unit
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
mm
(1,240×1,680×760)×3
inch
(48.8×66.1×29.9)×3
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
19.05(3/4)
41.3(1 5/8)
ENGLISH
System
3 Outdoor Unit
42
36
ARUN432BT3
ARUN144BT3
ARUN144BT3
ARUN144BT3
28.2
62.1
61
280 × 3
617 × 3
Power Supply: Outdoor Unit (3Ø, 460V, 60Hz)
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Dimensions
mm
inch
(WxHxD)
Connecting
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
Pipes
Product Charge
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
8
6
ARUN072DT3
ARUN072DT3
5.5
12.1
13
190 x 1
418 x 1
(920×1,680×760)×1
(36.2×66.1×29.9)×1
9.52(3/8)
19.05(3/4)
1 Outdoor Unit
14
12
ARUN144DT3
ARUN144DT3
9.4
20.7
23
270 × 1
595 × 1
mm
(1,240×1,680×760)×1
inch
(48.8×66.1×29.9)×1
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
12.7(1/2)
28.58(1 1/8)
1 Outdoor Unit
10
8
ARUN096DT3
ARUN096DT3
9.4
20.7
16
270 × 1
595 × 1
(1,240×1,680×760)×1
(48.8×66.1×29.9)×1
9.52(3/8)
22.2(7/8)
12
10
ARUN120DT3
ARUN120DT3
9.4
20.7
20
270 × 1
595 × 1
(1,240×1,680×760)×1
(48.8×66.1×29.9)×1
12.7(1/2)
28.58(1 1/8)
2 Outdoor Unit
18
20
14
16
ARUN168DT3
ARUN192DT3
ARUN072DT3
ARUN072DT3
ARUN096DT3
ARUN120DT3
14.9
14.9
32.8
32.8
26
29
(190 × 1) + (270 × 1)
(190 × 1) + (270 × 1)
(418 × 1) + (595 × 1)
(418 × 1) + (595 × 1)
(920×1,680×760)×1
(920×1,680×760)×1
(1,240×1,680×760)×1
(1,240×1,680×760)×1
(36.2×66.1×29.9)×1
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×1
(48.8×66.1×29.9)×1
15.88(5/8)
15.88(5/8)
28.58(1 1/8)
28.58(1 1/8)
Installation Manual 11
Outdoor Units Information
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
mm
inch
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
Unit
System
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
22
18
ARUN216DT3
ARUN072DT3
ARUN144DT3
14.9
32.8
32
(190 × 1) + (270 × 1)
(418 × 1) + (595 × 1)
(920×1,680×760)×1
(1,240×1,680×760)×1
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×1
15.88(5/8)
28.58(1 1/8)
2 Outdoor Unit
28
24
ARUN288DT3
ARUN144DT3
ARUN144DT3
19
41
42
270 × 2
595 × 2
mm
(1,240×1,680×760)×2
inch
(48.8×66.1×29.9)×2
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
19.05(3/4)
34.9(1 3/8)
HP
Ton
36
30
ARUN360DT3
ARUN072DT3
ARUN144DT3
ARUN144DT3
24.3
53.5
52
(190 × 1) + (270 × 2)
(418 × 1) + (595 × 2)
(920×1,680×760)×1
(1,240×1,680×760)×2
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×2
19.05(3/4)
41.3(1 5/8)
Unit
System
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Product Charge
Dimensions
(WxHxD)
Connecting
Pipes
12
mm
inch
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
Outdoor Unit
2 Outdoor Unit
24
20
ARUN240DT3
ARUN096DT3
ARUN144DT3
19
41
35
270 × 2
595 × 2
26
22
ARUN264DT3
ARUN120DT3
ARUN144DT3
19
41
39
270 × 2
595 × 2
(1,240×1,680×760)×2
(1,240×1,680×760)×2
(48.8×66.1×29.9)×2
(48.8×66.1×29.9)×2
15.88(5/8)
34.9(1 3/8)
19.05(3/4)
34.9(1 3/8)
3 Outdoor Unit
32
34
26
28
ARUN312DT3
ARUN336DT3
ARUN072DT3
ARUN072DT3
ARUN096DT3
ARUN120DT3
ARUN144DT3
ARUN144DT3
24.3
24.3
53.5
53.5
45
49
(190 × 1) + (270 × 2)
(190 × 1) + (270 × 2)
(418 × 1) + (595 × 2)
(418 × 1) + (595 × 2)
(920×1,680×760)×1
(920×1,680×760)×1
(1,240×1,680×760)×2
(1,240×1,680×760)×2
(36.2×66.1×29.9)×1
(36.2×66.1×29.9)×1
(48.8×66.1×29.9)×2
(48.8×66.1×29.9)×2
19.05(3/4)
19.05(3/4)
34.9(1 3/8)
34.9(1 3/8)
3 Outdoor Unit
38
32
ARUN384DT3
ARUN096DT3
ARUN144DT3
ARUN144DT3
28.2
62.1
55
270 × 3
595 × 3
40
34
ARUN408DT3
ARUN120DT3
ARUN144DT3
ARUN144DT3
28.2
62.1
58
270 × 3
595 × 3
(1,240×1,680×760)×3
(1,240×1,680×760)×3
(48.8×66.1×29.9)×3
(48.8×66.1×29.9)×3
19.05(3/4)
41.3(1 5/8)
19.05(3/4)
41.3(1 5/8)
Outdoor Units Information
Unit
HP
Ton
Model
kg
lbs
Max. Connectable No. of Indoor Units
kg
Net Weight
lbs
Dimensions
mm
inch
(WxHxD)
Connecting
Liquid Pipes[mm(inch)]
Gas Pipes[mm(inch)]
Pipes
Product Charge
ENGLISH
System
3 Outdoor Unit
42
36
ARUN432DT3
ARUN144DT3
ARUN144DT3
ARUN144DT3
28.2
62.1
61
270 × 3
595 × 3
(1,240×1,680×760)×3
(48.8×66.1×29.9)×3
19.05(3/4)
41.3(1 5/8)
Installation Manual 13
Environment-friendly Alternative Refrigerant R410A
Environment-friendly Alternative Refrigerant R410A
• The refrigerant R410A has the property of higher operating pressure in comparison with R22.
Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is
0. These days the developed countries have approved it as the environment-friendly refrigerant and encouraged to use it widely to prevent environment pollution.
CAUTION:
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed
pressure 3.8MPa(551.1psi).
• Since R410A is a mixed refrigerant, the required additional refrigerant must be charged in its liquid state.
If the refrigerant is charged in its gaseous state, its composition changes and the system will not work properly.
• Do not place the refrigerant container under the direct rays of the sun to prevent it from exploding.
• For high-pressure refrigerant, any unapproved pipe must not be used.
• Do not heat pipes more than necessary to prevent them from softening.
• Be careful not to install wrongly to minimize economic loss because it is expensive in comparison with R22.
14
Outdoor Unit
Select the Best Location
ENGLISH
Select the Best Location
Select space for installing outdoor unit, which will meet the following conditions:
• No direct thermal radiation from other heat sources
• No possibility of annoying neighbors by noise from unit
• No exposition to strong wind
• With strength which bears weight of unit
• Note that drain flows out of unit when heating
• With space for air passage and service work shown next
• Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and
leakage of combustible gas is expected.
• Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.
• Do not use unit under any special environment where oil, steam and sulfuric gas exist.
• It is recommended to fence round the outdoor unit in order to prevent any person or animal from accessing the
outdoor unit.
• If installation site is area of heavy snowfall, then the following directions should be observed.
- Make the foundation as high as possible.
- Fit a snow protection hood.
• Select installation location considering following conditions to avoid bad condition when additionally performing
defrost operation.
1. Install the outdoor unit at a place well ventilated and having a lot of sunshine in case of installing the product at a place With a high humidity in winter (near beach, coast, lake, etc. )
(Ex : Rooftop where there is always sunshine.)
Installation Manual 15
Installation Space
Installation Space
Individual Installation
n During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space
as shown in the figures below.
Category
Case 1
Case 2
(10mm≤Space A, C≤49mm) (Space A, C≥49mm)
Installation Space
B
A
C
D
Front
B
A
E
E
C
Front
D
A≥10(13/32”)
B≥300(11-13/16”)
C≥10(13/32”)
D≥500(19-11/16”)
A≥50(1-31/32”)
B≥100(3-15/16”)
C≥50(1-31/32”)
D≥500(19-11/16”)
A≥10(13/32”)
B≥300(11-13/16”)
C≥10(13/32”)
D≥500(19-11/16”)
E≥20(25/32”)
A≥50(1-31/32”)
B≥100(3-15/16”)
C≥50(1-31/32”)
D≥500(19-11/16”)
E≥100(3-15/16”)
A≥10(13/32”)
B≥300(11-13/16”)
C≥10(13/32”)
D≥500(19-11/16”)
E≥20(25/32”)
F≥600(23-5/8”)
A≥50(1-31/32”)
B≥100(3-15/16”)
C≥50(1-31/32”)
D≥500(19-11/16”)
E≥100(3-15/16”)
F≥500(19-11/16”)
A≥10(13/32”)
B≥300(11-13/16”)
C≥10(13/32”)
D≥300(11-13/16”)
E≥20(25/32”)
F≥500(19-11/16”)
A≥50(1-31/32”)
B≥100(3-15/16”)
C≥50(1-31/32”)
D≥100(3-15/16”)
E≥100(3-15/16”)
F≥500(19-11/16”)
B
4 sides are
walls
A
E
F
C
Front
Front
D
B
A
E
F
C
Front
Front
D
B
A
No limit to the height of the wall
Only 2 sides
are walls
A≥10(13/32”)
B≥300(11-13/16”)
Front
B
E
A
E
A≥200(7-7/8”)
B≥300(11-13/16”)
No limit to the
E≥400(15-3/4”)
height of the wall
Front
16
ˆR
ˆQ
QYMQQOQV@
a
UYMQOQV@
Limitations on
the height of
the wall
(Refer to 4 side
walls)
Outdoor Unit
b
• The height of the wall on the front side must be 1500mm(59-1/16 inch) or less.
• The height of the wall on the inlet side must be 500mm(19-11/16 inch) or less.
• There is no limit to the wall on the side.
• If the height of the walls on the front and the inlet are higher than the limit, there
must be additional space on the front and the side.
- Additional Space on the inlet side by 1/2 of h1.
- Additional Space on the front side by 1/2 of h2
- h2 = A(Actual height) - 59-1/16
- h1 = B(Actual height) - 19-11/16
Installation Space
Seasonal wind and cautions in winter
• Get ready for seasonal wind or snow in winter even in other areas.
• Install a suction and discharge duct not to let in snow or rain.
• Install the outdoor unit not to come in contact with snow directly. If snow piles up and freezes on the air suction
hole, the system may malfunction. If it is installed at snowy area, attach the hood to the system.
• Install the outdoor unit at the higher installation console by 500mm(19-11/16inch) inch than the average snowfall
(annual average snowfall) if it is installed at the area with much snowfall.
• Where snow accumulated on the upper part of the Outdoor Unit by more than 100mm(3-15/16inch), always remove
snow for operation.
1. The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of the
product. (If width of the frame is wider than that of the product, snow may accumulate)
2. Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind.
Installation Manual 17
ENGLISH
• Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well.
Lifting Method
Lifting method
• When carrying the suspended, unit pass the ropes under the unit and use the two suspension points each at the
front and rear.
• Always lift the unit with ropes attached at four points so that impact is not applied to the unit.
• Attach the ropes to the unit at an angle of 40° or less.
Locking points for
transportation ropes
Weight per Capacity
Chassis
UX2
UX3
Capacity
Weight [kg(lbs)]
[HP(Ton)] 3Ø 208/230V 3Ø 460V
8 (6)
190 (418) 190 (418)
10 (8)
280 (617) 270 (595)
12 (10) 280 (617) 270 (595)
14 (12) 280 (617) 270 (595)
Forklift Carrying Hole
Forklift Carrying Guide
CAUTION
Be very careful while carrying the product.
• Do not have only one person carry product if it is more than 20kg(44lbs).
• PP bands are used to pack some products. Do not use them as a mean for transportation because they
are dangerous.
• Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.
• Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging
bag may suffocate children to death.
• When carrying in Outdoor Unit, be sure to support it at four points. Carrying in and lifting with 3-point
support may make Outdoor Unit unstable, resulting in a fall.
• Use 2 belts of at least 3m(26.2ft) long.
• Place extra cloth or boards in the locations where the casing comes in contact with the sling to prevent
damage.
• Hoist the unit making sure it is being lifted at its center of gravity.
18
Outdoor Unit
Installation
• Install at places where it can endure the weight and vibration/noise of the outdoor unit.
• The outdoor unit supports at the bottom shall have width of at least 100mm(3-15/16 inch) under the units legs before
being fixed.
• The outdoor unit supports should have minimum height of 200mm(7-7/8 inch).
• Anchor bolts (M10) must be inserted at least 75mm(2-15/16 inch).
mm
200
ast
At le
mm
100
ast
At le
The outdoor unit should not be
supported only by the corner
supports.
Set up supports under center of the unit.
mm
100
mm
ast
100
At le
ast
le
t
A
Center of the Unit
mm
200
ast
At le
mm
100
ast
At le
Set up supports under center of the unit.
mm
100
mm
ast
100
ast
At le
At le
Center of the Unit
The location of the Anchor bolts
Chassis
UX2
UX3
760(29-29/32)
At least
65(2-9/16)
At least
65(2-9/16)
Outdoor unit capacity
H/R
8HP
10~14HP
730(28-3/4)
65(2-9/16)
65(2-9/16)
Unit : mm(inch)
A [mm(inch)]
B [mm(inch)]
920(36-7/32)
1240(48-13/16)
792(31-3/16)
1102(43-3/8)
Installation Manual 19
ENGLISH
Installation
Installation
Foundation for Installation
• Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust.
• Use the H-beam support as a base support
• Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part
depending on installation status. Thus, use anti-vibration materials (cushion pad) fully (The base pad shall
be more than 200mm(7-7/8 inch).
At least 10mm
(13/32 inch)
At least 200mm
(7-7/8 inch)
200(7-7/8)
75(2-15/16)
200(7-7/8)
75(2-15/16)
100(3-15/16)
Unit : mm(inch)
Ⓐ The corner part must be fixed firmly. Otherwise, the
support for the installation may be bent.
Ⓑ Get and use M10 Anchor bolt.
Ⓒ Put Cushion Pad between the outdoor unit and ground
support for the vibration protection in wide area.
Ⓓ Space for pipes and wiring (Pipes and wirings for bottom
side)
Ⓔ H-beam support
Ⓕ Concrete support
WARNING
• Install where it can sufficiently support the weight of the outdoor unit.
If the support strength is not enough, the outdoor unit may drop and hurt people.
• Install where the outdoor unit may not fall in strong wind or earthquake.
If there is a fault in the supporting conditions, the outdoor unit may fall and hurt people.
• Please take extra cautions on the supporting strength of the ground, liquid outlet
treatment(treatment of the liquid flowing out of the outdoor unit in operation), and the passages of
the pipe and wiring, when making the ground support.
• Do not use tube or pipe for liquid outlet in the Base pan. Use drainage instead for liquid outlet.
The tube or pipe may freeze and the liquid may not be drained.
WARNING
• Be sure to remove the MDF(wood support) of the bottom
side of the outdoor unit Base Pan before fixing the bolt.
It may cause the unstable state of the outdoor
settlement, and may cause freezing of the heat
exchanger resulting in abnormal operations.
• Be sure to remove the MDF(wood support) of the bottom
side of the outdoor unit before welding. Not removing
MDF causes hazard of fire during welding.
20
Outdoor Unit
Pallet(Wood Support)
- Remove before Installation
Installation
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
1) Cut the pipes and the cable.
n Use the accessory piping kit or the pipes purchased locally.
n Measure the distance between the indoor and the outdoor unit.
n Cut the pipes a little longer than measured distance.
Copper
tube
90
Slanted Uneven Rough
Pipe
2) Burrs removal
Reamer
n Completely remove all burrs from the cut cross section
of pipe/tube.
n 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.
Point down
3) Flaring work
n Carry out flaring work using flaring tool as shown below.
Indoor unit
[kW(Btu/h]
Pipe [inch]
Gas
Liquid
<5.6(19,100)
1/2
1/4
<16.0(54,600)
5/8
3/8
<22.4(76,400)
3/4
3/8
“ A “ [inch]
Gas
Liquid
0.02~0.03 0~0.02
(0.5~0.8) (0~0.5)
0.03~0.04 0.02~0.03
(0.8~1.0) (0.5~0.8)
0.04~0.05 0.02~0.03
(1.0~1.3) (0.5~0.8)
Handle
Bar
Bar
"A"
Yoke
Cone
Copper pipe
Clamp handle
Red arrow mark
n For below models, carry out flaring work using flaring
tool as shown below.
Applicable Indoor unit models:
ARNU093TN★2, ARNU123TN★2, ARNU153TN★2,
ARNU183TM★2, ARNU243TM★2, ARNU153BG★2,
ARNU183BG★2, ARNU243BG★2
Pipe [inch]
Gas
Liquid
5/8
3/8
“A” [inch(mm)]
Gas
Liquid
0.03~0.04 0.02~0.03
(0.8~1.0) (0.5~0.8)
n Firmly hold copper tube in a bar (or die) as indicated dimension in the table above.
Smooth all round
Inside is shining without scratches.
4) Check
= Improper flaring =
n Compare the flared work with figure below.
n 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 21
ENGLISH
Preparation of Piping
Installation
FLARE SHAPE and FLARE NUT TIGHTENING TORQUE
Precautions when connecting pipes
• See the following table for flare part machining dimensions.
• When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three
or four times at first. (Use ester oil or ether oil.)
• See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)
• After all the piping has been connected, use nitrogen to perform a gas leak check.
Pipe size [inch(mm)] Tightening torque [lbf-in(Ncm)]
A [inch(mm)]
Ø3/8(9.52)
289.4(3270)-353.1(3990)
0.5(12.8)-0.52(13.2)
Ø1/2(12.7)
438.1(4950)-533.7(6030)
0.64(16.2)-0.65(16.6)
Ø5/8(15.88)
547.0(6180)-667.3(7540)
0.76(19.3)-0.78(19.7)
flare shape
90
2
45
2
A
R=0.4(1/64)~0.8(1/32)
CAUTION
• Always use a charge hose for service port connection.
• After tightening the cap, check that no refrigerant leaks are present.
• When loosening a flare nut, always use two wrenches in
combination, When connecting the piping, always use a spanner
and torque wrench in combination to tighten the flare nut.
• When connecting a flare nut, coat the flare(inner and outer faces)
with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as
the initial tightening.
Union
Opening shutoff valve
1. Remove the cap and turn the valve counter clockwise with the hexagon wrench.
2. Turn it until the shaft stops.
Do not apply excessive force to the shutoff valve. Doing so may break the valve body, as the valve is not a
backseat type. Always use the special tool.
3. Make sure to tighten the cap securely.
Closing shutoff valve
1. Remove the cap and turn the valve clockwise with the hexagon wrench.
2. Securely tighten the valve until the shaft contacts the main body seal.
3. Make sure to tighten the cap securely.
* For the tightening torque, refer to the table on the below.
Tightening torque
Shutoff valve
size
Tightening torque(Turn clockwise to close) [N·m(lbf·ft)]
Shaft(valve body)
Cap(Valve lid)
Service port
Ø6.35(1/4)
5.4(4.0) ~ 6.6(4.9)
Ø9.52(3/8)
Ø12.7(1/2)
8.1(6.0) ~ 9.9(7.3)
Ø15.88(5/8) 13.5(10.0) ~ 16.5(12.2)
Ø19.05(3/4)
Ø22.2(7/8)
27(19.9) ~ 33(24.3)
Ø28(1 / )
1 8
22
Outdoor Unit
13.5(10.0) ~
16.5(12.2)
Hexagonal
wrench
4mm
(5/8inch)
18(13.3) ~ 22(16.2)
Hexagonal
wrench
8mm(5/16inch)
36(26.6) ~ 44(32.5)
23(17.0) ~ 27(19.9)
Flare nut
14(10.3) ~ 17(12.5)
33(24.3) ~ 39(28.8)
50(36.9) ~ 60(44.3)
62(45.7) ~ 75(55.3)
11.5(8.5)
~ 13.9(10.3) 93(68.6) ~119(87.8)
-
Installation
HEAT INSULATION
Installation Manual 23
ENGLISH
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance
(over 248℉(120℃)).
Fastening band
2. Precautions in high humidity circumstance:
(accessory)
This air conditioner has been tested according to the
"ISO Conditions with Mist" and confirmed that there is
not any default. However, if it is operated for a long
time in high humid atmosphere (dew point temperaRefrigerant piping
ture: more than 73℉(23℃)), water drops are liable to
fall. In this case, add heat insulation material accord- Indoor unit
ing to the following procedure:
Thermal insulator
• EPDM (Ethylene Propylene Diene Methylene), NBR
(accessory)
(Nitrile Butadiene Rubber) – over 248℉(120℃)
the heat-resistance temperature.
• Add the insulation over 10mm (13/32inch) thickness at high humidity environment.
Refrigerant piping installation
Refrigerant piping installation
Precautions on Pipe connection / Valve operation
Pipe connection is done by connecting from the end of the pipe to the
branching pipes, and the refrigerant pipe coming out of the outdoor
unit is divided at the end to connect to each indoor unit. Flare connection for the indoor unit, and welding connection for the outdoor pipe
and the branching parts.
Gas pipe
Liquid pipe
• Use hexagonal wrench to open/close the valve.
Common pipe
WARNING
• Always careful not to leak the refrigerant during welding.
• The refrigerant generates poisonous gas harmful to human body if combusted.
• Do not perform welding in a closed space.
• Be sure to close the cap of the service port to prevent gas leakage after the work.
CAUTION
Please block the pipe knock outs of the front and side panels after installing the pipes.
(Animals or foreign objects may be brought in to damage the cables.)
High Low Pressure Common Pipe Connections
1. For High Low Pressure Common Pipe, use provided elbows to
connect between the outdoor units using pipes.
2. During the cutting of the pipes, remove burr, foreign substances
before connecting. Otherwise, the unit may not operate because
of the sludge inside the pipe.
3. Apply Nitrogen Gas of pressure until 551.1psi(38.7kgf/cm²) for
work area leakage test.
Installing 2 units
4. After the degree of a vacuum reaches 0.097psi(5torr), continue the
vacuuming work for more than 1 hour.
5. Open the side pole with hexagonal wrench.
Installing 3 units
h When connecting to high low pressure common pipe, connect pipes using connecting
elbows.
Detach knock outs according
the usages.
24
Outdoor Unit
Detach
knock outs
according
the usages.
Installing on the front side
Installing on the side(Limited to high
low pressure common pipe)
Refrigerant piping installation
2 outdoor units
[Unit: inch(mm)]
Outdoor units
Model
Gas pipe
I.D.28.58(1-1/8)
Liquid pipe
331(13-1/32)
416(16-3/8)
408(16-1/16)
I.D.28.58(1-1/8)
314(12-3/8)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.12.7(1/2)
I.D.22.2(7/8)
I.D.31.8(1-1/4) I.D.34.9(1-3/8)
C
2 Unit
C
111(4-3/8)
I.D.19.05(3/4)
I.D.9.52(3/8)
83(3-9/32)
ARCNN21
I.D.12.7(1/2) I.D.15.88(5/8)
I.D.28.58(1-1/8)
I.D.12.7(1/2)
I.D.22.2(7/8) O.D.19.05(3/4)
O.D.15.88(5/8)
I.D.9.52(3/8)
I.D.38.1(1-1/2)
I.D.41.3(1-5/8) O.D.34.9(1-3/8)
I.D.22.2(7/8)
O.D.28.58(1-1/8)
C
I.D.19.05(3/4)
130(5-1/8)
70(2-3/4)
110(4-11/32)
120(4-23/32)
406(15-31/32)
353(13-29/32)
334(13-5/32)
281(11-1/16)
3 Unit
I.D.41.3(1-5/8)
I.D34.9(1-3/8)
I.D.34.9(1-3/8)
111(4-3/8)
I.D38.1(1-1/2)
I.D.22.2(7/8) O.D.19.05(3/4)
83(3-9/32)
O.D.19.05(3/4)
ARCNN31
I.D.15.88(5/8)
I.D.28.58(1-1/8)
I.D.41.3(1-5/8)
C
O.D.34.9(1-3/8)
I.D.22.2(7/8)
O.D.28.58(1-1/8)
I.D. 15.88(5/8)
O.D. 19.05(3/4)
I.D. 12.7(1/2)
X2
I.D.19.05(3/4)
125(4-29/32)
120(4-23/32)
I.D.12.7(1/2)
I.D.9.52(3/8)
O.D. 12.7(1/2)
I.D. 6.35(1/4)
110(4-11/32)
110(4-11/32)
For more information, refer accessory installation manual.
Common pipes
I.D.3/4(19.05) O.D.3/4(19.05)
I.D.3/4(19.05)
O.D.3/4(19.05)
Field Supply (Not provided by LG)
Facing
downwards
Y branch
A
A To outdoor unit
B To branch piping or indoor unit
Facing
upwards
Within +/- 10
B
Viewed from point A
in direction of arrow
Within ± 3°
Within ± 3°
Installation Manual 25
ENGLISH
Connection of Outdoor units
Refrigerant piping installation
Caution
1. Use the following materials for refrigerant piping.
• Material: Seamless phosphorous deoxidized copper pipe
• Wall thickness : Comply with the relevant local and national regulations for the designed pressure
3.8Mpa(551.1psi). We recommend the following table as the minimum wall thickness.
Outer diameter
[mm(inch)]
6.35
(1/4)
9.52
(3/8)
12.7
(1/2)
15.88
(5/8)
19.05
(3/4)
22.2
(7/8)
25.4
(1)
28.58
(1-1/8)
31.8
(1-1/4)
34.9
(1-3/8)
38.1
(1-1/2)
41.3
(1-5/8)
Minimum thickness
[mm(inch)]
0.8
(0.0315)
0.8
(0.0315)
0.8
(0.0315)
0.99
(0.039)
0.99
(0.039)
0.99
(0.039)
0.99
(0.039)
0.99
(0.039)
1.1
(0.043)
1.21
(0.048)
1.35
(0.053)
1.43
(0.056)
2. Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert
gas.
3. Use care to prevent dust, water or other contaminants from entering the piping during installation.
4. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.
5. Always use the branch piping set shown below, which are sold separately.
Header
Y branch
ARBLN01621, ARBLN03321,
ARBLN07121, ARBLN14521
4 branch
7 branch
10 branch
ARBL054
ARBL057
ARBL1010
ARBL104
ARBL107
ARBL2010
6. If the diameters of the branch piping of the designated refrigerant piping differs, use a pipe cutter to cut
the connecting section and then use an adapter for connecting different diameters to connect the piping.
7. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and
piping diameter).
Failure to do so can result in equipment failure or a decline in heating/cooling performance.
8. A second branch cannot be made after a header. (These are shown by
A
.)
A
B
A To Outdoor Unit
B Sealed Piping
9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always
properly charge the unit. When servicing, always check the notes concerning both the piping length and
the amount of additional refrigerant.
10. Never perform a pump down. This will not only damage the compressor but also deteriorate the performance.
11. Never use refrigerant to perform an air purge. Always evacuate air by using a vacuum pump.
26
Outdoor Unit
Refrigerant piping installation
WARNING
When installing and moving the air conditioner to another site, be sure to make recharge refrigerant
after perfect evacuation.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and
the unit may be damaged.
- After selecting diameter of the refrigerant pipe to suit total capacity of the indoor unit connected after
branching, use an appropriate branch pipe set according to the pipe diameter of the indoor unit and the installation pipe drawing.
Installation Manual 27
ENGLISH
12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of condensate and other such problems.
13. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely
closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor
Units has been connected, a refrigerant leakage test has been performed and the evacuation process
has been completed.
14. Always use a non-oxidizing brazing material for brazing the parts and do not use flux. If not, oxidized film
can cause clogging or damage to the compressor unit and flux can harm the copper piping or refrigerant
oil.
Pipe connections between indoor and outdoor unit
Pipe connections between indoor and outdoor unit
• Pipe connections can be done on the front side or on the side according to the installation environments.
• Be sure to let 2.8psi(0.2kgf/cm²) Nitrogen flow in the pipe when welding.
• If Nitrogen was not flown during welding, many oxidized membranes may form inside the pipe and disturb the normal
operations of valves and condensers.
Regulator
Refrigerant Pipe
Right Side Pipe Draw Out
Nitrogen
Direction
Taping
Valve
Left Side Pipe Draw Out
Nitrogen
Front Side Pipe Draw Out
Preparation Work
• Use Knock Outs of Base Pan of the outdoor unit for Left/Right or Bottom pipe drawing outs.
CAUTION
• Do not give damage to the pipe/base during the Knock Out work.
• Proceed to pipe work after removing burr after Knock Out work.
• Perform sleeve work to prevent damage to the wire when
connecting wires using Knock Outs.
Removal Area for common
pipe bottom side connections.
Removal Area for Liquid/Gas pipe
bottom side connections.
CAUTION
• Remove the brackets on the inverter condenser legs that were fixed to protect the unit during the transportation.
(If bracket is not removed, abnormal noise or vibration may occur.)
Nut
Washer
1. Open the front panel.
2. Remove Brackets
3. Fix with only nut and washer as shown in the
figure.
Brackets for Transportation
28
Outdoor Unit
Pipe connections between indoor and outdoor unit
n Remove leakage prevention cap
Service Port
ENGLISH
• Remove the leakage prevention cap attached to the outdoor unit service valve before pipe work.
• Proceed the leakage prevention cap removal as follows:
1. Verify whether the liquid/gas/common pipes are locked.
2. Extract remaining refrigerant or air inside using the
service port.
3. Remove the leakage prevention cap
Liquid pipe
Gas pipe
Common pipe
n Method of pipe cap work during the installation of single outdoor unit
1. Remove rubber cap inserted in the common pipe.
2. Wrap the common pipe service valve with wet towel.
3. Insert the pipe cap provided into the common pipe.
4. Place high/low pressure flare nut cap under the pipe cap so
that the pipe cap does not move.
5. Weld the pipe cap.
h If not wrapped with a wet towel, there may be damages inside the valve.
h If the unit is operated without pipe cap work, there may be
abnormality in the cycle caused by refrigerant leakage.
Leakage Prevention Cap
Pipe Cap
Flare Nut
Pipe Drawing Out during Single / Series connection
n Method of drawing out pipes on the front side
• Proceed with the pipe work as shown in the below figure for front side pipe drawing out.
Common pipe Liquid pipe
Gas pipe
Pipe Knock Out for
Liquid/Gas pipes
Pipe Knock Out for
common pipes
Installation Manual 29
Pipe connections between indoor and outdoor unit
n Method of drawing out pipes on the bottom side
① Drawing out common pipe through side panel
Common pipe
Liquid pipe Gas pipe
Remove only liquid/gas pipe Knock Out
View without base pan
② Drawing out common pipe through bottom pipe
Common pipe
Liquid pipe Gas pipe
View without base pan
n Figure of Sides when drawing out through bottom pipe
Remove Pipe
Knock Out Hole
i) Single outdoor unit
30
ii) Series outdoor units
(Draw out common pipes
through bottom)
Outdoor Unit
iii) Series outdoor units
(Draw out common pipes
through side panel)
Pipe connections between indoor and outdoor unit
ENGLISH
Refrigerant piping system
u Y branch method
1 Outdoor Units
Example : 5 Indoor Units connected
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
H 361ft(110m)
L492ft(150m) (656ft(200m) : Conditional application)
l 131ft(40m) (295ft(90m) : Conditional application)
49ft(15m)
2 Outdoor Units
Slave
Master Slave
Example : 5 Indoor Units connected
33ft
(10m)
or
less
H 361ft(110m)
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓔ : Connection branch pipe
between Outdoor units:
ARCNN21
Master
Slave
Master
ODU Capacity
Master ≥ Slave
L492ft(150m) (656ft(200m) : Conditional application)
l 131ft(40m) (295ft(90m) : Conditional application)
49ft(15m)
Piping length from outdoor branch to outdoor unit ≤ 33ft(10m), equivalent length:max 43ft(13m) (for
12ton(14HP) or more)
Additional Application
To satisfy below condition to make 131ft(40m) ~ 295ft(90m) of pipe length after first branch.
1) Diameter of pipes between first branch and the last branch should be increased by one step,
except pipe diameter B,C,D is same as Diameter A
Ø1/4(6.35mm)→Ø3/8(9.52mm)→Ø1/2(12.7mm)→Ø5/8(15.88mm)→Ø3/4(19.05mm)→Ø7/8(22.2mm)→Ø1(25.4)*,
Ø1-1/8(28.58mm)→Ø1-1/4(31.8mm)*,Ø1-3/8(34.9mm)→Ø1-1/2(38.1mm)*
* : It is not necessary to size up.
h If the step up size is not available, you can not select the next higher size available.
2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.
A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 3281ft(1000m)
3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 131ft(40m)
4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]
- [Length of pipe from outdoor unit to the closest indoor unit 1 (A+a)] ≤ 131ft(40m)
Installation Manual 31
Pipe connections between indoor and outdoor unit
3 Outdoor Units
Slave2
Slave1
Example : 5 Indoor Units
connected
Ⓕ : Connection branch pipe
between Outdoor units:
ARCNN21
323ft
(10m) or
less
H 361ft(110m)
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓔ : Connection branch pipe
between Outdoor units:
ARCNN31
Master
ODU Capacity
Master ≥ Slave1 ≥ Slave 2
L492ft(150m) (656ft(200m) : Conditional application)
l 131ft(40m) (295ft(90m) : Conditional application)
49ft(15m)
Piping length form outdoor branch to outdoor unit ≤ 33ft(10m), equivalent length : max. 43ft(13m)(for
12ton(14HP) or more)
Additional Application
To satisfy below condition to make 131ft(40m) ~ 295ft(90m) of pipe length after first branch.
1) Diameter of pipes between first branch and the last branch should be increased by one step, except
pipe diameter B,C,D is same as Diameter A
Ø1/4(6.35mm)→Ø3/8(9.52mm)→Ø1/2(12.7mm)→Ø5/8(15.88mm)→Ø3/4(19.05mm)→Ø7/8(22.2mm)→Ø1(25.4)*,
Ø1-1/8(28.58mm)→Ø1-1/4(31.8mm)*,Ø1-3/8(34.9mm)→Ø1-1/2(38.1mm)*
* : It is not necessary to size up.
h If the step up size is not available, you can not select the next higher size available.
2) While calculating whole refrigerant pipe length, pipe B,C,D length should be calculated twice.
A+Bx2+Cx2+Dx2+a+b+c+d+e ≤ 3281ft(1000m)
3) Length of pipe from each indoor unit to the closest branch (a,b,c,d,e) ≤ 131ft(40m)
4) [Length of pipe from outdoor unit to the farthest indoor unit 5 (A+B+C+D+e)]
- [Length of pipe from outdoor unit to the closest indoor unit 1 (A+a)] ≤ 131ft(40m)
32
Outdoor Unit
Pipe connections between indoor and outdoor unit
Ú Refrigerant pipe diameter from branch to branch (B,C,D)
ENGLISH
Liquid pipe
[inch(mm)]
1/4(Ø6.35)
3/8(Ø9.52)
3/8(Ø9.52)
3/8(Ø9.52)
1/2(Ø12.7)
5/8(Ø15.88)
5/8(Ø15.88)
3/4(Ø19.05)
3/4(Ø19.05)
7/8(Ø22.2)
7/8(Ø22.2)
Downward Indoor Unit total capacity
[kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
≤ 22.4(76,400)
< 33.6(114,700)
< 50.4(172,000)
< 67.2(229,400)
< 72.8(248.500)
< 100.8(344,000)
< 173.6(592,500)
< 184.8(630,700)
< 224.0(764,400)
Gas pipe
[inch(mm)]
1/2(Ø12.7)
5/8(Ø15.88)
3/4(Ø19.05)
7/8(Ø22.2)
11/8( Ø28.58)
11/8 (Ø28.58)
13/8(Ø34.9)
13/8(Ø34.9)
15/8(Ø41.3)
13/4(Ø44.5)
2(Ø53.98)
Ú Total pipe length = A+B+C+D+a+b+c+d+e ≤ 3281ft(1000m)
L
l
H
h
h1
Longest pipe length
Equivalent pipe length
A+B+C+D+e ≤ 492ft(656ft**(200m))
*A+B+C+D+e ≤ 574ft(656ft**(200m))
Longest pipe length after 1st branch
B+C+D+e ≤ 131ft**(40m))
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 361ft(110m)
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 49ft(15m)
Difference in height (Outdoor Unit ÷ Outdoor Unit)
h1 ≤ 16.4ft(5m)
• * : Assume equivalent piping length of Y branch to be 1.6ft(0.5m), that of header to be 3.3ft(1m), calculation
purpose.
• ** : To apply Conditional Application
WARNING
If overall equivalent pipe length is greater than or equal to 295ft(90m) from ODU to the longest IDU,
The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.
Ú Refrigerant pipe diameter from outdoor unit to first branch. (A)
Outdoor unit
Total capacity
[kW (Btu/h)
16.0~22.4(54,600~76,400)
28.0(95,900)
33.6~44.8(172,000~152,900)
50.4~61.6(172,000~210,600)
67.2(229,400)
72.8~95.2(248,500~324,900)
100.8~168.0(344,000~573,300)
173.6~179.2(592,500~611,600)
184.8~224.0(630,700~764,400)
Standard Pipe Diameter
Liquid pipe
[mm (inch)]
Φ9.52(3/8)
Φ12.7(1/2)
Φ15.88(5/8)
Φ19.05(3/4)
Φ22.2(7/8)
Gas pipe
[mm (inch)]
Φ19.05(3/4)
Φ22.2(7/8)
Φ28.58(1 1/8)
Φ34.9(1 3/8)
Φ41.3(1 5/8)
Φ44.5(1 3/4)
Φ53.98(2)
Conditional application
(more than 90m from ODU to IDU)
Liquid pipe
Gas pipe
[mm (inch)]
[mm (inch)]
Φ22.2(7/8)
Φ12.7(1/2)
Φ25.4(1)
Φ15.88(5/8)
Φ28.58(1 1/8)
Φ31.8(1 1/4)
Φ19.05(3/4)
Φ34.9(1 3/8)
Φ38.1(1 1/2)
Φ22.2(7/8)
Φ41.3(1 5/8)
Φ25.4(1)
Φ53.98(2)
h If the step up size is not available, you can not select the next higher size available.
Installation Manual 33
Pipe connections between indoor and outdoor unit
u Header Method
1 Outdoor Unit
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping
H 361ft(110m)
Example : 6 Indoor Units connected
L 656ft(200m)
131ft(40m)
49ft(15m)
2 Outdoor Units
Slave
Outdoor Unit
Master
ODU Capacity
Master Slave
L 656ft(200m)
131ft(40m)
49ft(15m)
34
Master
33ft
(10m) or
less
L 361ft(110m)
Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe between Outdoor units:
ARCNN21
Slave
Slave
Master
Example : 6 Indoor Units connected
Pipe connections between indoor and outdoor unit
3 Outdoor Units
Slave2
Ⓐ : Outdoor Unit
Ⓑ : Header branch
Ⓒ : Indoor Units
Ⓓ : Sealing
Ⓔ : Connection branch pipe
between Outdoor units:
ARCNN31
Master
ODU Capacity
Master ≥ Slave1 ≥ Slave2
33ft
(10m)
or less
H 361ft(110m)
L 656ft(200m)
Ⓕ : Connection branch pipe
between Outdoor units:
ARCNN21
131ft(40m)
49ft(15m)
Branch pipe can not be used after header
Ú Total pipe length = A+a+b+c+d+e+f ≤ 3280.8ft(1000m)
L
l
H
h
h1
Longest pipe length
* Equivalent pipe length
A+f ≤ 656ft(200m)
A+f ≤ 738ft(225m)
Longest pipe length after 1st branch
f ≤ 131ft(40m)
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 361ft(110m)
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 49ft(15m)
Difference in height (Outdoor Unit ÷ Outdoor Unit)
h1 ≤ 16ft(5m)
WARNING
Pipe length after header branching
(a~f)
It is recommended that difference in
length of the pipes connected to the
Indoor Units is minimized.
Performance difference between
Indoor Units may occur.
• * : Assume equivalent piping length of Y branch to be 1.6ft(0.5m), that of header to be 3.3ft(1m), calculation purpose
• It is recommended that indoor unit Is installed at lower position than the header.
• Piping length from outdoor branch to outdoor unit ≤ 33ft(10m), equivalent length : max 43ft(13m)
(for 12ton(14HP) or more)
WARNING
If overall equivalent pipe length is greater than or equal to 295ft(90m) from ODU to the longest IDU,
The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.
Ú Refrigerant pipe diameter from outdoor unit to first branch. (A)
Outdoor unit
Total capacity
[kW (Btu/h)
16.0~22.4(54,600~76,400)
28.0(95,900)
33.6~44.8(172,000~152,900)
50.4~61.6(172,000~210,600)
67.2(229,400)
72.8~95.2(248,500~324,900)
100.8~168.0(344,000~573,300)
173.6~179.2(592,500~611,600)
184.8~224.0(630,700~764,400)
Standard Pipe Diameter
Liquid pipe
[mm (inch)]
Φ9.52(3/8)
Φ12.7(1/2)
Φ15.88(5/8)
Φ19.05(3/4)
Φ22.2(7/8)
Gas pipe
[mm (inch)]
Φ19.05(3/4)
Φ22.2(7/8)
Φ28.58(1 1/8)
Φ34.9(1 3/8)
Φ41.3(1 5/8)
Φ44.5(1 3/4)
Φ53.98(2)
Conditional application
(more than 90m from ODU to IDU)
Liquid pipe
Gas pipe
[mm (inch)]
[mm (inch)]
Φ22.2(7/8)
Φ12.7(1/2)
Φ25.4(1)
Φ15.88(5/8)
Φ28.58(1 1/8)
Φ31.8(1 1/4)
Φ19.05(3/4)
Φ34.9(1 3/8)
Φ38.1(1 1/2)
Φ22.2(7/8)
Φ41.3(1 5/8)
Φ25.4(1)
Φ53.98(2)
h If the step up size is not available, you can not select the next higher size available.
Installation Manual 35
ENGLISH
Slave1
Example : 6 Indoor Units connected
Pipe connections between indoor and outdoor unit
u Combination of Y branch/header method
1 Outdoor Units
L 492ft(150m)(656ft(200m) : Conditional application)
131ft(40m)(295ft(90m) : Conditional application)
49ft(15m)
Ⓐ : Outdoor Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping
L 361ft(110m)
Example : 5 Indoor Units connected
Branch pipe can not be used after header
Slave
Example : 5 Indoor Units connected
33ft
(10m)
or less
H 361ft(110m)
Ⓐ : Outdoor Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe between Outdoor units:
ARCNN21
Ⓕ : Header
Ⓖ : Sealed piping
Slave
Master
Slave
Master
Master
ODU Capacity
Master Slave
L 492ft(150m)(656ft(200m) : Conditional application)
131ft(40m)(295ft(90m) : Conditional application)
49ft(15m)
2 Outdoor Units
Branch pipe can not be used after header
36
Outdoor Unit
Pipe connections between indoor and outdoor unit
3 Outdoor Units
Slave2
Master
ODU Capacity
Master ≥ Slave1 ≥ Slave2
F
E
L 492ft(150m)(656ft(200m) : Conditional application)
131ft(40m)(295ft(90m) : Conditional application)
49ft(15m)
33ft
(10m)
or less
H 361ft(110m)
Ⓐ : Outdoor Unit
Ⓑ : 1st branch(Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe between Outdoor units:
ARCNN31
Ⓕ : Connection branch pipe between Outdoor units:
ARCNN21
Ⓖ : Header
Ⓗ : Sealing
ENGLISH
Slave1
Example : 5 Indoor Units connected
Branch pipe can not be used after header
Installation Manual 37
Pipe connections between indoor and outdoor unit
Ú Refrigerant pipe diameter from branch to branch (B,C)
Liquid pipe
[inch(mm)
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø15.88(5/8)
Ø19.05(3/4)
Ø19.05(3/4)
Ø22.2(7/8)
Ø22.2(7/8)
Downward Indoor Unit total capacity
[kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
≤ 22.4(76,400)
< 33.6(114,700)
< 50.4(172,000)
< 67.2(229,400)
< 72.8(248.500)
< 100.8(344,000)
< 173.6(592,500)
< 184.8(630,700)
< 224.0(764,400)
Gas pipe
[inch(mm)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
Ø28.58(11/8 )
Ø28.58(11/8 )
Ø34.9(13/8)
Ø34.9(13/8)
Ø41.3(15/8)
Ø44.5(13/4)
Ø53.98(2)
Ú Total pipe length = A+B+C+a+b+c+d+e ≤ 3280.8ft(1000m)
L
l
H
h
h1
Longest pipe length
* Equivalent pipe length
A+B+b ≤ 492ft(656ft(200m)**)
A+B+b ≤ 574ft(738ft(225m)**)
Longest pipe length after 1st branch
B+b ≤ 131ft(40m)(295ft(90m)**)
Difference in height(Outdoor Unit ÷ Indoor Unit)
H ≤ 361ft(110m)
Difference in height (Indoor Unit ÷ Indoor Unit)
h ≤ 49ft(15m)
Difference in height (Outdoor Unit ÷ Outdoor Unit)
h1 ≤ 16ft(5m)
• * : Assume equivalent pipe length of Y branch to be 1.6ft(0.5m), that of header to be 3.3ft(1m), calculation purpose
• It is recommended that indoor unit is installed at lower position than the header.
WARNING
If overall equivalent pipe length is greater than or equal to 295ft(90m) from ODU to the longest IDU,
The diameter of the main pipe (Gas and Liquid pipes) must be increased as follow.
Ú Refrigerant pipe diameter from outdoor unit to first branch. (A)
Outdoor unit
Total capacity
[kW (Btu/h)
16.0~22.4(54,600~76,400)
28.0(95,900)
33.6~44.8(172,000~152,900)
50.4~61.6(172,000~210,600)
67.2(229,400)
72.8~95.2(248,500~324,900)
100.8~168.0(344,000~573,300)
173.6~179.2(592,500~611,600)
184.8~224.0(630,700~764,400)
Standard Pipe Diameter
Liquid pipe
[mm (inch)]
Φ9.52(3/8)
Φ12.7(1/2)
Gas pipe
[mm (inch)]
Φ19.05(3/4)
Φ22.2(7/8)
Φ28.58(1 1/8)
Φ15.88(5/8)
Φ34.9(1 3/8)
Φ19.05(3/4)
Φ22.2(7/8)
Φ41.3(1 5/8)
Φ44.5(1 3/4)
Φ53.98(2)
h If available on site, it use this size. Otherwise it can't be increased.
38
Outdoor Unit
Conditional application
(more than 90m from ODU to IDU)
Liquid pipe
Gas pipe
[mm (inch)]
[mm (inch)]
Φ22.2(7/8)
Φ12.7(1/2)
Φ25.4(1)
Φ15.88(5/8)
Φ28.58(1 1/8)
Φ31.8(1 1/4)
Φ19.05(3/4)
Φ34.9(1 3/8)
Φ38.1(1 1/2)
Φ22.2(7/8)
Φ41.3(1 5/8)
Φ25.4(1)
Φ53.98(2)
Pipe connections between indoor and outdoor unit
u Outdoor unit Connection
• In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of the same
size with A.
Ex) In case indoor unit combination ratio 120% is connected to 70kW outdoor unit.
1) Outdoor unit main pipe diameter A : Ø34.9(1-3/8, gas pipe), Ø15.88(5/8, liquid pipe)
2) Pipe diameter B after first branch according to 120% indoor unit combination(84kW) : Ø34.9(1-3/8, gas pipe),
Ø19.05(3/4, liquid pipe)
Therefore, pipe diameter B connected after first branch would be Ø34.9(1-3/8, gas pipe) / Ø15.88(5/8, liquid pipe)
which is same with main pipe diameter.
[Example]
Instead of using indoor unit total capacity, use outdoor unit model name in order to choose main pipe diameter by
downward.
Do not let the connection pipe from branch to branch exceed the main pipe diameter chosen by outdoor unit model name.
EX) Where connecting the indoor units to the 22 HP (61.6kW) outdoor unit to 120% of its system capacity (73.8 kW) and
branching 7k Btu/h(2.2kW) indoor unit at the 1st branch
Main pipe diameter(22 HP outdoor unit): Ø28.58(1-1/8, Gas pipe) Ø15.88(5/8, Liquid pipe)
Pipe diameter between 1st and 2nd branch (71.7kW indoor units):
Ø34.9(1-3/8, Gas pipe) Ø19.05(3/4, Liquid pipe) in conformity with downward indoor units.
Since the main pipe diameter of 22HP outdoor unit is Ø28.58(1-1/8, Gas pipe) and Ø15.88(5/8, Liquid pipe), Ø28.58 (11/8, Gas pipe) and Ø15.88(5/8, Liquid pipe) is used as the main pipe and the connection pipe between 1st and 2nd
branch.
* High/Low Pressure Common Pipe: Ø19.05(3/4) ; 14HP or more
u Indoor Unit Connection
Ú Indoor Unit connecting pipe from branch (a,b,c,d,e,f)
≤ 5.6(19,100)
Liquid pipe
[mm(inch)]
Ø6.35(1/4)
Gas pipe
[mm(inch)]
Ø12.7(1/2)
< 16.0(54,600)
Ø9.52(3/8)
Ø15.88(5/8)
≤ 22.4(76,400)
Ø9.52(3/8)
Ø19.05(3/4)
Indoor Unit capacity [kW(Btu/h)]
* ARNU093TN*2, ARNU123TN*2, ARNU153TN*2, ARNU183TM*2, ARNU243TM*2 : Liquid pipe Ø9.52(3/8), Gas pipe
Ø15.88(5/8)
ARNU153BG*2, ARNU183BG*2, ARNU243BG*2 : Liquid pipe Ø9.52(3/8), Gas pipe Ø15.88(5/8)
Installation Manual 39
ENGLISH
WARNING
Pipe connections between indoor and outdoor unit
u Pipe Connection Method/Precautions for Series connections between Outdoor units
- Separate Y branch joints are needed for series connections between outdoor units.
- Please refer to the below connection examples to install pipe connections between outdoor units.
n Pipe connection between outdoor units
(General Case)
The maximum pipe length
after the first branching
between the outdoor units is
10m(33ft) or less
n Pipes between outdoor units are
2m(6.6ft) or less
2m(6.6)ft or less
n Pipes between outdoor units are
2m(6.6ft) or longer
Oil Trap
0.2m(0.66ft) or more
2m(6.6ft) or less
2m(6.6ft) or longer
Oil Trap
2m(6.6ft) or less
2m(6.6ft) or longer
Oil Trap
2m(6.6ft) or less
2m(6.6ft) or longer
• If the distance between the outdoor units becomes more than 2m(6.6ft), apply Oil Traps between the gas pipes.
• If the outdoor unit is located lower than the main pipe, apply Oil Trap.
n Examples of Wrong Pipe Connections
If the main pipe is higher
than the outdoor units, oil
is accumulated in the
outdoor unit.
If there are differences in the height
between the outdoor units, oil is
accumulated in the lower outdoor unit.
40
Outdoor Unit
Oil Trap
Pipe connections between indoor and outdoor unit
(Example 1)
Toward indoor unit
Toward indoor unit
(Example 2)
Toward indoor unit
Pipe inclination (2 or more)
Toward indoor unit
(Example 3)
Toward indoor unit
Toward indoor unit
• Apply Oil Trap only to gas pipe as shown below when the length of the pipe between the outdoor units is over 2m(6.6ft).
Otherwise, the unit may not operate properly.
(Example 1)
Toward indoor unit
≤2m(6.6ft)
≥ 0.2m(6.6ft)
(Example 2)
Oil Trap
Toward indoor unit
≤ 2m(6.6ft)
> 2m(6.6ft)
* Install oil trap if the ODU is at lower level than main piping.
Installation Manual 41
ENGLISH
• The pipes between the outdoor units must maintain level or give an inclination to prevent a back flow toward the slave
outdoor unit. Otherwise, the unit may not operate properly.
Pipe connections between indoor and outdoor unit
• When connecting the pipes between the outdoor units, the accumulation of oil in the slave outdoor unit should be avoided.
Otherwise, the unit may not operate properly.
(Example 1)
Toward indoor unit
Toward indoor unit
(Example 2)
h
Toward indoor unit
(Example 3)
Oil Trap
h
Toward indoor unit
≥ 0.2m(6.6ft)
Toward indoor unit
h
* The level difference between two outdoor units, h is allowed up to 5m(16.4ft).
42
Outdoor Unit
Pipe connections between indoor and outdoor unit
u The amount of Refrigerant
Additional charge(kg)
=
Total liquid pipe
:Ø25.4 mm (1.0 inch)
x
0.323(lbs/ft)
+
Total liquid pipe
:Ø22.2 mm (7/8 inch)
x
0.238(lbs/ft)
+
Total liquid pipe
:Ø19.05 mm (3/4 inch)
x
0.179(lbs/ft)
+
Total liquid pipe
:Ø15.88 mm (5/8 inch)
x
0.116(lbs/ft)
+
Total liquid pipe
:Ø12.7 mm (1/2 inch)
x
0.079(lbs/ft)
+
Total liquid pipe
:Ø9.52 mm (3/8 inch)
x
0.041(lbs/ft)
+
Total liquid pipe
:Ø6.35 mm(1/4 inch)
x
0.015(lbs/ft)
+
CF value of indoor unit
(Unit: lbs)
CF value of indoor unit
Capacity(Btu/h(kW))
Type
Ceiling Concealed Duct (Low Static)
Ceiling Concealed Duct (High Static)
Wall Mounted
1Way Ceiling Cassette
2Way Ceiling Cassette
4Way Ceiling Cassette
ARTCOOL Gallery
Floor Standing
Ceiling & Floor
Ceiling Suspended
Console
Fresh Air Intake Unit
Heat recovery ventilator(DX)
Hydro kit
Vertical AHU
5k
7k
9k
12k
15k
-
0.37
0.57
0.37
0.57
0.37
0.57
0.40
0.53
0.44
0.40
-
0.22
0.37
0.77
0.37
-
0.53
0.44
0.55
1.06##
0.22
0.37
0.22
0.77
0.37
-
0.53
0.44
0.55
1.06##
0.22
0.37
0.22
0.37
0.44
-
0.37
0.57
0.97#
0.53
0.71
1.06##
0.37
1.19
0.37
-
28k
36k
42k
48k
76k
96k
0.82 0.82
0.57 0.57 0.97
0.97# 0.97#
0.62 0.62
0.64 0.64
0.35 0.35
0.71 1.06 1.06
##
##
1.41 1.41
0.82 0.82
1.65
0.44 0.44
1.04 1.04
-
0.97
0.97
1.37
2.20
2.20
1.41
1.41
1.41
-
-
1.57
2.00
1.37
2.00
2.20
2.00
2.20
3.53
2.00
18k
24k
CAUTION
Use only 2-series of indoor unit. Ex) ARNU***2
# : Use only ARNU153BGA2, ARNU183BGA2, ARNU243BGA2
##: Use only ARNU093TN*2, ARNU123TN*2, ARNU153TN*2, ARNU183TM*2, ARNU243TM*2
Installation Manual 43
ENGLISH
The calculation of the additional charge should take into account the length of pipe and CF(correction
Factor) value of indoor unit.
Pipe connections between indoor and outdoor unit
WARNING
▶ Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
Total amount of refrigerant in the system
Volume of the room at which Indoor Unit of the least capacity is installed
≤ 0.44(kg/m3(0.028 (lbs/ft³))
p If the above equation can not be satisfied, then follow the following steps.
- Selection of air conditioning system: select one of the next
1. Installation of effective opening part
2. Reconfirmation of Outdoor Unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security device (alarm for gas leakage)
- Change Indoor Unit type
: installation position should be over 6.6ft from the floor (Wall mounted type ’ Cassette type)
- Adoption of ventilation system
: choose ordinary ventilation system or building ventilation system
- Limitation in piping work
: Prepare for earthquake and thermal stress
Refrigerant Charging
Liquid pipe
Gas pipe
Ⓐ Manifold Gauge
Common pipe
Ⓑ Low pressure side Handle
Ⓒ High pressure side Handle
- Add exact amount of refrigerant calculated by the installation pipe diameter length and the indoor combination.
- If the refrigerant amount is not exact, it may not operate properly.
- If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit performance may be caused.
WARNING
- Pipe to be vacuumed : gas pipe, water pipe, common pipe
- If the refrigerant amount is not exact, it may not operate properly.
- If additionally bottled refrigerant amount is over ±10%, condenser burning or insufficient indoor unit performance may be caused.
44
Outdoor Unit
Pipe connections between indoor and outdoor unit
ENGLISH
Distribution Method
1. Line Distribution
Slave
Master
2nd
1st
Slave
3rd main pipe distribution
Master
Slave
Master
2nd
1st
2nd
1st
3rd
3rd
1st
Main pipe
Distribution
3rd
Main pipe
Distribution
2. Vertical Distribution
Ensure that the branch pipes are attached vertically.
Slave
Master
Slave
Master
3. The others
Slave
Master
Slave
Master
Header
Installation Manual 45
Pipe connections between indoor and outdoor unit
Branch pipe Fitting
Y branch
A To Outdoor Unit
B
B To Branch Piping or Indoor Unit
A
• Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.)
Facing
downwards
Horizontal
plane
Facing
upwards
Within +/- 10
A
Viewed from point A
in direction of arrow
Within 3
Within 3
• There is no limitation on the joint mounting configuration.
• If the diameter of the refrigerant piping selected by the procedures described is different from the size of
the joint, the connecting section should be cut with a pipe cutter.
• Branch pipe should be insulated with the insulator in each kit.
Tape
(field supply)
Liquid and gas
pipe joints
Insulator
(included with kit)
Insulator for
field piping
A
A To outdoor unit
Header
B To indoor unit
• The indoor unit having larger capacity must be
installed closer to Ⓐ than smaller one.
• If the diameter of the refrigerant piping selected
by the procedures described is different from
the size of the joint, the connecting section
should be cut with a pipe cutter.
B
C
ⓒ Pipe cutter
• When the number of pipes to be connected is
smaller than the number of header branches, install a cap to the unconnected branches.
46
Outdoor Unit
Pipe connections between indoor and outdoor unit
B
Pinched pipe
• Fit branch pipe lie in a horizontal plane.
Horizontal plane
View from point B in the direction of the arrow
• Header should be insulated with the insulator in each kit.
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
• Joints between branch and pipe should be sealed with the tape included in each kit.
Tape
Insulator
Insulator of field pipe
• Any cap pipe should be insulated using the insulator provided with each kit and then taped as described above.
Insulator for cap pipe
Cap pipe
Tape
Installation Manual 47
ENGLISH
• When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes
available for connection then cap pipes should be fitted to the surplus branches.
Pipe connections between indoor and outdoor unit
u Y branch pipe
[Unit:mm(inch)]
Gas pipe
Models
I.D12.7(1/2)
Liquid pipe
I.D12.7(1/2)
I.D15.88(5/8)
I.D15.88(5/8)
1
I.D9.52(3/8)
I.D6.35(1/4)
I.D6.35(1/4)
I.D9.52(3/8)
1
I.D15.88(5/8)
I.D12.7(1/2)
ARBLN01621
74
(2-29/32)
I.D6.35(1/4)
I.D9.52(3/8)
281(11-1/16)
292(11-1/2)
I.D19.05(3/4)
I.D12.7(1/2)
1
O.D15.88(5/8)
1
O.D9.52(3/8)
70(2-3/4)
70(2-3/4)
I.D22.2(7/8)
I.D25.4(1)
I.D19.05(3/4)
I.D15.88(5/8)
I.D19.05(3/4)
I.D12.7(1/2)
2
1
83
I.D19.05(3/4) I.D12.7
(1/2) (3-9/32)
I.D15.88(5/8)
390(15-11/32)
413(16-1/4)
ARBLN03321
I.D22.2(7/8)
O.D19.05(3/4)
3
1
O.D19.05(3/4)
2
80(3-5/32)
70(2-3/4)
1
321(12-5/8)
332(13-1/16)
110(4-11/32)
ARBLN07121
376(14-13/16)
404(15-29/32)
I.D28.58(1-1/8)
3
90(3-17/32)
120(4-23/32)
I.D15.88(5/8) I.D12.7(1/2)
I.D19.05(3/4)
I.D19.05(3/4)
I.D9.52(3/8)
O.D12.7(1/2)
I.D6.35(1/4)
3
2
120(4-23/32)
70(2-3/4)
110(4-11/32)
I.D38.1(1-1/2)
I.D15.88(5/8)
I.D19.05(3/4)
I.D28.58(1-1/8)
2
I.D19.05(3/4)
I.D22.2(7/8)
I.D15.88(5/8)
2
1
I.D28.58(1-1/8)
125
I.D34.9(1-3/8) I.D22.2(7/8)
(4-29/32)
I.D38.1(1-1/2)
471(18-17/32)
517(20-11/32)
I.D12.7(1/2)
3
O.D15.88(5/8)
70(2-3/4)
O.D28.58(1-1/8) I.D22.2(7/8)
I.D19.05(3/4)
2
120(4-23/32)
I.D15.88(5/8) I.D12.7 96
(1/2)
I.D19.05(3/4)
(3-25/32)
I.D22.2(7/8)
3
I.D19.05(3/4)
I.D41.3(1-5/8)
I.D38.1(1-1/2)
O.D22.2(7/8) I.D15.88(5/8)
O.D38.1(1-1/2)
O.D34.9(1-3/8)
3
2
I.D41.3
3
(1-5/8)
90(3-17/32)
120(4-23/32)
130(5-1/8)
Outdoor Unit
O.D12.7(1/2)
I.D34.9(1-3/8)
I.D34.9(1-3/8)
I.D41.3(1-5/8)
48
83
(3-9/32)
3
371(14-19/32)
394(15-1/2)
I.D9.52(3/8)
I.D34.9(1-3/8)
I.D22.2(7/8)
O.D19.05(3/4)
O.D22.2(7/8) I.D31.8(1-1/4) O.D31.8(1-1/4)
I.D28.58(1-1/8)
2
1
3
I.D19.05(3/4)
I.D15.88(5/8) I.D12.7(1/2)
2
I.D15.88(5/8)
I.D12.7(1/2)
96
I.D15.88(5/8) I.D12.7
I.D19.05(3/4)
(1/2) (3-25/32)
I.D31.8(1-1/4)
I.D12.7(1/2)
74
I.D9.52(3/8)
I.D6.35(1/4) (2-29/32)
I.D12.7(1/2)
I.D25.4(1)
I.D19.05(3/4)
I.D15.88(5/8)
I.D22.2(7/8)
2
I.D28.58(1-1/8)
I.D12.7(1/2)
I.D9.52(3/8)
I.D6.35(1/4)
I.D9.52(3/8)
I.D22.2(7/8)
I.D28.58(1-1/8)
O.D25.4(1)
3
ARBLN14521
74
(2-29/32)
281(11-1/16)
292(11-1/2)
3
41616-3/8)
444(17-15/32)
I.D9.52(3/8)
I.D12.7(1/2)
O.D19.05(3/4)
O.D15.88(5/8) I.D9.52(3/8)
I.D22.2(7/8) O.D12.7(1/2) I.D6.35(1/4)
2
3
110(4-11/32)
3
80(3-5/32)
110(4-11/32)
Pipe connections between indoor and outdoor unit
u Header
Gas pipe
Liquid pipe
360(14-5/32)
360(14-5/32)
120(4-23/32)
120(4-23/32)
ID12.7(1/2)
4 branch
ID6.35(1/4)
ID12.7(1/2)
ID15.88(5/8)
ARBL054
ID9.52(3/8)
150
120
(5-29/32)
(4-23/32)
ID15.88(5/8)
ID6.35(1/4)
ID12.7(1/2)
ID15.88(5/8)
ID19.05(3/4)
150
120
(5-29/32)
(4-23/32)
ID9.52(3/8)
ID9.52(3/8)
540(21-1/4)
540(21-1/4)
120(4-23/32)
120(4-23/32)
ID6.35(1/4)
ID12.7(1/2)
7 branch
ID12.7(1/2)
ARBL057
ID15.88(5/8)
ID15.88(5/8)
150
120
(5-29/32)
(4-23/32)
ID15.88(5/8)
ID19.05(3/4)
360(14-5/32)
160(6-5/16)
120(4-23/32)
ID15.88(5/8)
ID12.7(1/2)
ARBL104
ID15.88(5/8)
ID9.52(3/8)
ID12.7(1/2)
400(15-23/32)
4 branch
150
120
(5-29/32)
(4-23/32)
ID9.52(3/8)
ID6.35(1/4)
ID19.05(3/4)
ID28.58(1-1/8)
ID9.52(3/8)
150
120
(4-23/32) (5-29/32)
ID25.4(1)
ID6.35(1/4)
150
120
(4-23/32) (5-29/32)
ID9.52(3/8)
ID22.2(7/8)
ID9.52(3/8)
ID12.7(1/2)
700(27-9/16)
580(22-27/32)
160(6-5/16)
120(4-23/32)
ID6.35(1/4)
ID15.88(5/8)
7 branch
ARBL107
ID6.35(1/4)
ID12.7(1/2)
150
120
(4-23/32) (5-29/32)
ID19.05(3/4)
ID15.88(5/8)
ID28.58(1-1/8)
ID25.4(1)
ID12.7(1/2)
ID22.2(7/8)
760(29-28/32)
ARBL1010
ID15.88(5/8)
ID12.7(1/2)
150
120
(5-29/32)
(4-23/32)
ID19.05(3/4)
ID15.88(5/8)
120(4-23/32)
ID6.35(1/4)
ID6.35(1/4)
150
120
(5-29/32)
(4-23/32)
ID9.52(3/8)
ID9.52(3/8)
ID28.58(1-1/8)
ID25.4(1)
ID22.2(7/8)
700(27-9/16)
182(7-5/32)
ARBL2010
107(4-7/32)
60*9=540(21-1/2)
ID15.88(5/8)
ID6.35(1/4)
ID6.35(1/4)
ID12.7(1/2)
ID15.88(5/8)
ID9.52(3/8)
ID12.7(1/2)
775(30-17/32)
10 branch
ID9.52(3/8)
720(28-11/32)
160(6-5/16)
10 branch
150
120
(5-29/32)
(4-23/32)
ID9.52(3/8)
ID9.52(3/8)
ID19.05(3/4)
ID31.8(1-1/4)
ID34.9(1-3/8)
120
(4-23/32)
150
(5-29/32)
150
120
(4-23/32) (5-29/32)
ID9.52(3/8)
ID9.52(3/8)
ID28.58(1-1/8)
ID19.05(3/4)
ID15.88(5/8)
Installation Manual 49
ENGLISH
[Unit:mm(inch)]
Models
Pipe connections between indoor and outdoor unit
Leak Test and Vacuum drying
(1) Leak test
Leak test should be made by pressurizing nitrogen gas to 3.8Mpa(551.1psi). If the pressure does not drop for 24
hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method, refer
to the following figure. (Make a test with the service valves closed. Be also sure to pressurize liquid pipe, gas pipe
and high/low pressure common pipe)
The test result can be judged good if the pressure has not be reduced after leaving for about one day after completion
of nitrogen gas pressurization.
Slave 1 outdoor unit
Master outdoor unit
Close
Close
Gas pipe
Close
Liquide pipe
Gas pipe
High/low pressure
common pipe
Close
Close
Liquide pipe
Close
High/low pressure
common pipe
Nitrogen gas
cylinder
Liquid side
Nitrogen gas
cylinder
Indoor unit
Gas side
Note:
If the ambient temperature differs between the time when pressure is applied and when the pressure drop is
checked, apply the following correction factor
There is a pressure change of approximately 0.01Mpa(1.5psi) for each 1°C of temperature difference.
Correction= (Temp. at the time of pressurization – Temp. at the time of check) X 0.1
For example: Temperature at the time of pressurization 3.8MPa(551psi) is 27 °C
24 hour later: 3.73MPa(541psi), 20°C
In this case the pressure drop of 0.07MPa(10psi) is because of temperature drop
And hence there is no leakage in pipe occurred.
Caution:
To prevent the nitrogen from entering the refrigeration system in the liquid state, the top of the cylinder must be
at higher position than the bottom when you pressurize the system.
Usually the cylinder is used in a vertical standing position.
50
Outdoor Unit
Pipe connections between indoor and outdoor unit
Vacuum drying should be made from the service port provided on the outdoor unitʼs service valve to the vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum
from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.)
* Never perform air purging using refrigerant.
• Vacuum drying: Use a vacuum pump that can evacuate to -100.7kPa(-14.6psi, 5Torr, -755mmHg).
1. Evacuate the system from the liquid and gas pipes with a vacuum pump for over 2 hrs and bring the system to -100.7kPa(-14.6psi).
After maintaining system under that condition for over 1 hr, confirm the vacuum gauge rises. The system
may contain moisture or leak.
2. Following should be executed if there is a possibility of moisture remaining inside the pipe.
(Rainwater may enter the pipe during work in the rainy season or over a long period of time)
After evacuating the system for 2 hrs, give pressure to the system to 0.05MPa(7.3psi)(vacuum break) with
nitrogen gas and then evacuate it again with the vacuum pump for 1hr to -100.7kPa(-14.6psi)(vacuum drying). If the system cannot be evacuated to -100.7kPa(-14.6psi) within 2 hrs, repeat the steps of vacuum
break and its drying.
Finally, check if the vacuum gauge does not rise or not, after maintaining the system in vacuum for 1 hr.
Slave 1 outdoor unit
Master outdoor unit
Vacuum
pump
Close
Close
Gas pipe
Close
Liquide pipe
High/low pressure
common pipe
Gas pipe
Vacuum
pump
Close
Close
Liquide pipe
High/low pressure
common pipe
Close
Liquid side
Indoor unit
Scale
Use a graviometer. (One that can measure
down to 0.1kg(0.22lbs). If you are unable to
prepare such a high-precision gravimeter
you may use a charge cylinder.
Gas side
Note : Always add an appropriate amount of refrigerant. (For the refrigerant additional charge)
Too much or too little refrigerant will cause trouble.
To use the Vacuum Mode
(If the Vacuum mode is set, all valves of Indoor units and Outdoor units will be opened.)
WARNING
When Installing or moving the air conditioner to another site, recharge after perfect evacuation.
- If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and
the unit may be damaged.
Installation Manual 51
ENGLISH
(2) Vacuum
Pipe connections between indoor and outdoor unit
Vacuum Mode
This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement.
Vacuum mode setting method
Vacuum mode cancellation method
ODU power reset
Master unit PCB DIP switch off
- Heat pump : switch off 11, 14
- Cooling only : switch off 11, 14
Master unit PCB DIP switch on
- Heat pump : switch on 11, 14
- Cooling only : switch on 11, 14
Power reset
Vacuum mode cancellation
Press the black button Main PCB (5 sec.)
Vacuum mode setting
ODU V/V OPEN
Main EEV, SC EEV OPEN
IDU EEV OPEN
DIP Switch Settings
Warning : Please reset Main PCB before starting this function
CAUTION
ODU operation stops during vacuum mode. Compressor can't operate.
52
Outdoor Unit
Pipe connections between indoor and outdoor unit
Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough
thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating
material, and insulating materials themselves. When insulation work is insufficient, there is a possibility of condensation drip, etc. Pay special attention to insulation work to ceiling plenum.
B
A
C
Heat
insulation
material
Outer
covering
A Heat insulation material
Adhesive + Heat - resistant polyethylene foam +
Adhesive tape
Indoor
Vinyl tape
Floor exposed Water-proof hemp cloth + Bronze asphalt
Outdoor
Water-proof hemp cloth + Zinc plate + Oily paint
Note:
When using polyethylene cover as covering material, asphalt roofing shall not be required.
B Pipe
C Outer covering
(Wind the connection part and cutting part of
heat insulation material with a finishing tape.)
• Do not insulate gas or low pressure pipe and liquid or high
pressure pipe together.
B
F
A
Bad example
• Be sure to fully insulate connecting portion.
A
A Liquid pipe
B Gas pipe
C Power lines
D Finishing tape
C
E Insulating material
D
E
F Transmission lines
A These parts are not insulated.
C
Power lines
D
Transmission lines
D
A
B
E
Good example
A Liquid pipe
Separation
B Gas pipe
C Power lines
D Insulating material
E Transmission lines
Penetrations
Outer wall
Inner wall (concealed)
C
A
Outer wall (exposed)
D
B
A
B
E
B
I
Floor (fireproofing)
D
Roof pipe shaft
I
G
F
Penetrating portion on fire
limit and boundary wall
J
D
B
G
H
A
B
1m
1m
Sleeve
Heat insulating material
Lagging
Caulking material
Band
Waterproofing layer
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
Incombustible heat insulation material
When filling a gap with mortar, cover the
penetration part with steel plate so that
the insulation material will not be caved in.
For this part, use incombustible materials
for both insulation and covering.(Vinyl
covering should not be used.)
Installation Manual 53
ENGLISH
Thermal insulation of refrigerant piping
Electrical Wiring
Electrical Wiring
Caution
1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring
regulations and guidance of each electric power company.
WARNING
Be sure to have authorized electrical engineers do the electric work using special circuits in
accordance with regulations and this installation manual. If power supply circuit has a lack of
capacity or electric work deficiency, it may cause an electric shock or fire.
2. Install the Outdoor Unit transmission line away from the power source wiring so that it is not affected by electric
noise from the power source. (Do not run it through the same conduit.)
3. Be sure to provide designated grounding work to Outdoor Unit.
CAUTION
Be sure to correct the outdoor unit to earth. Do not connect earth line to any gas pipe, liquid pipe,
lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.
4. Give some allowance to wiring for electrical part box of Indoor and Outdoor Units, because the box is sometimes
removed at the time of service work.
5. Never connect the main power source to terminal block of transmission line. If connected, electrical parts will
be burnt out.
6. Use 2-core shield cable for transmission line.(O mark in the figure below) If transmission lines of different systems are wired with the same multiplecore cable, the resultant poor transmitting and receiving will cause erroneous operations. (
mark in the figure below)
7. Only the transmission line specified should be connected to the terminal block for Outdoor Unit transmission.
Outdoor Unit
Outdoor Unit
Indoor
Unit
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Outdoor Unit
Remote
control
Remote
control
Outdoor Unit
Indoor
Unit
2-Core Shield Cable
Outdoor Unit
Indoor
Unit
Indoor
Unit
Remote
control
54
Indoor
Unit
Remote
control
Indoor
Unit
Remote
control
Multi-Core Cable
Remote
control
Electrical Wiring
Outdoor Unit
Slave1
Master
Slave2
Indoor
Unit
Indoor
Unit
Indoor
Unit
Remote
controller
Remote
controller
Remote
controller
Outdoor Unit
Outdoor Unit
Slave1
Slave2
Indoor
Unit
Remote
controller
Master
Slave1
ENGLISH
Outdoor Unit
Master
Master
Slave2
Indoor
Unit
Remote
controller
Slave1
Slave2
Indoor
Unit
Indoor
Unit
Remote
controller
Remote
controller
2-Core Shield Cable
Indoor
Unit
Remote
controller
Multi-Core Cable
CAUTION
• Use the 2-core shield cables for transmission lines. Never use them together with power cables.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate
power factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never
install a phase leading capacitor.
• Make sure that the power unbalance ratio is not greater than 2%. If it is greater the units lifespan will
be reduced.
u Precautions when laying power wiring
Use round pressure terminals for connections to the power terminal block.
Round pressure terminal
Power wire
When none are available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring
may cause abnormal heat.)
• For wiring, use the designated power wire and connect firmly, then secure to prevent outside pressure
being exerted on the terminal block.
• Use an appropriate screwdriver for tightening the terinal screws. A screwdriver with a small head will
strip the head and make proper tighterning impossible.
• Over-tightening the terminal screws may break them.
Installation Manual 55
Electrical Wiring
Control box and connecting position of wiring
- Remove all of the screws at front panel and remove the panel by pulling it forward.
- Connect transmission line between main and sub outdoor unit through the
terminal block.
- Connect transmission lines between outdoor unit and indoor units through
the terminal block.
- When the central control system is connected to the outdoor unit, a dedicated PCB must be connected between them.
- When connecting transmission line between outdoor unit and indoor units
with shielded wire, connect the shield ground to the earth screw.
Front Panel
WARNING
The temperature sensor for outdoor air should not be exposed to direct sunlight.
- Provide an appropriate cover to intercept direct sunlight.
n 3Ø 208/230V
UX2
UX3
Main PCB
Main PCB
Reactor
Fan PCB
Reactor
Fan PCB
Noise filter
Noise filter
Bridge diode
Bridge diode
Magnet switch
Magnet switch
Inverter PCB
Inverter PCB
Take care of the phase
sequence of 3-phase 3-wire
power system
Take care of the phase
sequence of 3-phase 3-wire
power system
n 3Ø 460V
UX2
UX3
Main PCB
Main PCB
Transformer
Reactor
Fan PCB
Transformer
Reactor
Fan PCB
Noise filter
Noise filter
Bridge diode
Magnet switch
Bridge diode
Magnet switch
Inverter PCB
Inverter PCB
Take care of the phase
sequence of 3-phase 3-wire
power system
56
Outdoor Unit
Take care of the phase
sequence of 3-phase 3-wire
power system
Electrical Wiring
ENGLISH
Transmission and Power Lines
1) Communication cable
• Type : shielding wire
• Use wires of size : over 1.0~1.5mm2
• Maximum allowable line length: under 1,000m(3,281ft)
2) Remote control cable
• Type : 3-core cable(shielding wire)
3) Central control cable
Product type
Wire type
Diameter
ACP&AC Manager
(2-shielding wire,2-core wire)
1.0~1.5mm2
AC Smart
(2-shielding wire,2-core wire)
1.0~1.5mm2
Simple central controller
(2-shielding wire,2-core wire)
1.0~1.5mm2
4) Separation of communication and power lines
• If communication and power lines are run alongside each other then there is a strong likelihood of
operational faults developing due to interference in the signal wiring caused by electrostatic and
electromagnetic coupling.
The tables below indicates our recommendation as to appropriate spacing of communication and power
lines where these are to be run side by side
Current capacity of power line
100V or more
Spacing
10A
300m(11-13/16inch)
50A
500m(19-11/16inch)
100A
1,000m(39-3/8inch)
Exceed 100A
1,500m(59-1/16inch)
Note:
1. The figures are based on assumed length of parallel cabling up to 100m(328ft). For length in excess of
100m(328ft) the figures will have to be recalculated in direct proportion to the additional length of line
involved.
2. If the power supply waveform continues to exhibit some distortion the recommended spacing in the table
should be increased.
• If the lines are laid inside conduits then the following point must also be taken into account when grouping
various lines together for introduction into the conduits
• Power lines(including power supply to air conditioner) and signal lines must not be laid inside the same
• In the same way, when grouping the lines power and signal lines should not be bunched together.
CAUTION
n If apparatus is not properly earthed then there is always a risk of electric shocks, the earthing job of the
apparatus must be carried out by a qualified person.
Installation Manual 57
Electrical Wiring
Wiring of main power supply and equipment capacity
1. Use a separate power supply for the Outdoor Unit and Indoor Unit.
2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
3. The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank
thicker taking into account the line voltage drops. Make sure the power-supply voltage does not drop
more than 10%.
4. Specific wiring requirements should adhere to the wiring regulations of the region.
5. Power supply cords of parts of appliances for outdoor use should not be lighter than polychloroprene
sheathed flexible cord.
6. Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from
the power supply.
WARNING
• Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company.
• Make sure to use specified wires for connections so that no external force is imparted to terminal connections. If connections are not fixed firmly, it may cause heating or fire.
• Make sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include
some amount of direct current.
CAUTION
• Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may
cause an electric shock.
• Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a malfunction of unit or fire.
58
Outdoor Unit
Electrical Wiring
ENGLISH
Field Wiring(3Ø, 208/230V)
1. 60Hz
u Example Connection of Transmission Cable
n 1 Outdoor Unit - 3Ø, 208/230V
Power supply
3 Phase 3 Wires
60Hz 208/230V
[Outdoor Unit]
(Main Switch)
R S T
Switch
ELCB
Power supply
1 Phase 60Hz
220~240V
N
L
Power Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
ELCB
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU
B
3
A
4
IDU
B
INTERNET DRY1 DRY2 GND 12V
A
B
3
A
4
3
Master
Outdoor Unit
4
The GND terminal at the main PCB is a ‘-’ terminal for day contact, it is not the point to make
ground connection.
Note
1) Field Wiring diagram is to be used as a guidelineonly. Wiring should comply with applicable local and national codes
2) ELCB must have function to prevent electrical short and over current at the same time .
3) Use copper wires only.
4) Unit must be grounded in compliance with the applicable local and national codes.
5) ELCB and fuse/breaker must install to the power line
Installation Manual 59
Electrical Wiring
n 2 Outdoor Units - 3Ø, 208/230V
■ Do not install the power source connected in series between the units.
Power supply
3 Phase 3 Wires
60Hz 208/230V
[Master]
(Main Switch)
[Slave]
R S T
Switch
ELCB
Power Supplyy
1phase 60Hz
Hz
220~240V
0V
L
N
Power Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
ELCB
Commu
Communication
Line
(2 W
Wires Cable)
Pull Box
(Installer option)
ption)
Pull Box
(Installer option)
Pull Box
(Installer
aller option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
Pow
(2 W
Wires Cable)
ommunication Line
Communication
(3 Wires Cable)
[Indoor Units]
■ Be sure that the power source is supplied to Each outdoor unit individually.
Power supply
3 Phase 3 Wires
60Hz 208/230V
[Master]
(Main Switch)
R S T
Switch
Power Supply
1phase 60Hz
220~240V
L
ELCB
[Slave]
R S T
Switch
ELCB
ELCB
N
Power Line
(2 Wires Cable)
Power Line
(3 Wires Cable)
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Note
1) Field Wiring diagram is to be used as a guidelineonly. Wiring should comply with applicable local and national codes
2) ELCB must have function to prevent electrical short and over current at the same time .
3) Use copper wires only.
4) Unit must be grounded in compliance with the applicable local and national codes.
5) ELCB and fuse/breaker must install to the power line
60
Outdoor Unit
Electrical Wiring
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU
B
3
A
4
IDU
B
INTERNET DRY1 DRY2 GND 12V
A
B
3
A
4
3
4
Master
Outdoor Unit
SODU
B
A
IDU
SODU
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
IDU
B
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
A
Master
Outdoor Unit
Slave
Outdoor Unit
The GND terminal at the main PCB is a ‘-’ terminal for dry contact.
It is not the point to make ground connection.
• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)
Installation Manual 61
ENGLISH
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
Electrical Wiring
n 3 Outdoor Units - 3Ø, 208/230V
■ Do not install the power source connected in series between the units.
Power supply
3 Phase 3 Wires
60Hz 208/230V
[Master]
(Main Switch)
[Slave1]
[Slave2]
R S T
Switch
ELCB
Power supply
1 Phase 60Hz
220~240V
L
N
Power Line
(3 Wires Cable)
Powe Line
Power
(2 Wire
Wires Cable)
ELCB
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Powe
Power Line
(2 Wires Ca
Cable)
Power Line
(2 Wires Cable)
Power L
Line
res Cable)
Cable
(2 Wires
ation Line
Communication
(3 Wires Cable)
[Indoor Units]
■ Be sure that the power source is supplied to Each outdoor unit individually.
Power supply
3 Phase 3 Wires
60Hz 208/230V
[Master]
(Main Switch)
R S T
Switch
Power supply
1 Phase 60Hz
220~240V
L
ELCB
R S T
Switch
ELCB
[Slave1]
[Slave2]
R S T
Switch
ELCB
ELCB
N
Power Line
(2 Wires Cable)
Communication Line
(2 Wires Cable)
Power Line
(3 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Note
1) Field Wiring diagram is to be used as a guidelineonly. Wiring should comply with applicable local and national codes
2) ELCB must have function to prevent electrical short and over current at the same time .
3) Use copper wires only.
4) Unit must be grounded in compliance with the applicable local and national codes.
5) ELCB and fuse/breaker must install to the power line
62
Outdoor Unit
Electrical Wiring
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU
B
3
A
4
IDU
B
INTERNET DRY1 DRY2 GND 12V
A
B
3
A
4
3
4
Master
Outdoor Unit
SODU
B
IDU
A
IDU
A
IDU
B
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
SODU
B
INTERNET DRY1 DRY2 GND 12V
A
B
SODU
B
The GND terminal at the main PCB is a ‘-’
terminal for dry contact.
It is not the point to make ground
connection.
• Make sure that terminal number of master
and slave outdoor units are
matched.(A-A,B-B)
A
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
A
Master
Outdoor Unit
Slave1
Outdoor Unit
Slave2
Outdoor Unit
Installation Manual 63
ENGLISH
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
Electrical Wiring
Field Wiring(3Ø, 460V)
1. 60Hz
u Example Connection of Communication Cable
n 1 Outdoor Unit - 3Ø, 460V
Power supply
3 Phase 3 Wires
60Hz 460V
[Outdoor Unit]
(Main Switch)
R S T
Switch
ELCB
Power supply
1 Phase 60Hz
220~240V
N
L
Power Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
ELCB
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU
B
3
A
IDU
B
4
INTERNET DRY1 DRY2 GND 12V
A
B
3
A
4
3
Master
Outdoor Unit
4
The GND terminal at the main PCB is a ‘-’ terminal for day contact, it is not the point to make
ground connection.
Note
1) Field Wiring diagram is to be used as a guideline only. Wiring should comply with applicable local and national codes
2) ELCB must have function to prevent electrical short and over current at the same time .
3) Use copper wires only.
4) Unit must be grounded in compliance with the applicable local and national codes.
5) ELCB and fuse/breaker must install to the power line
64
Outdoor Unit
Electrical Wiring
n 2 Outdoor Units - 3Ø, 460V
ENGLISH
■ When the power source is connected in series between the units.
Power Supply
3phase 3wires
60Hz 460V
[Master]
(Main Switch)
[Slave]
R S T
Switch
ELCB
Power Supply
1phase 60Hz
220~240V
L
N
Power Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
ELCB
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
■ Be sure that the power source is supplied to Each outdoor unit individually.
Power Supply
3phase 3wires
60Hz 460V
[Master]
(Main Switch)
R S T
Switch
Power Supply
1phase 60Hz
220~240V
L
ELCB
[Slave]
R S T
Switch
ELCB
ELCB
N
Power Line
(2 Wires Cable)
Power Line
(3 Wires Cable)
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Note
1) Field Wiring diagram is to be used as a guideline only. Wiring should comply with applicable local and national codes
2) ELCB must have function to prevent electrical short and over current at the same time .
3) Use copper wires only.
4) Unit must be grounded in compliance with the applicable local and national codes.
5) ELCB and fuse/breaker must install to the power line
Installation Manual 65
Electrical Wiring
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU
B
3
A
4
IDU
B
INTERNET DRY1 DRY2 GND 12V
A
B
3
A
4
3
4
Master
Outdoor Unit
SODU
B
A
IDU
SODU
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
IDU
B
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
A
The GND terminal at the main PCB is a ‘-’ terminal for dry contact.
It is not the point to make ground connection.
• Make sure that terminal number of master and slave outdoor units are matched.(A-A,B-B)
66
Outdoor Unit
Master
Outdoor Unit
Slave
Outdoor Unit
Electrical Wiring
n 3 Outdoor Units - 3Ø, 460V
ENGLISH
■ When the power source is connected in series between the units.
Power supply
3 Phase 3 Wires
60Hz 460V
[Master]
(Main Switch)
[Slave1]
[Slave2]
R S T
Switch
ELCB
Power supply
1 Phase 60Hz
220~240V
L
N
Power Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
ELCB
Communication Line
(2 Wires Cable)
Pull Box
(Installer option)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
■ Be sure that the power source is supplied to Each outdoor unit individually.
Power supply
3 Phase 3 Wires
60Hz 460V
[Master]
(Main Switch)
R S T
Switch
Power supply
1 Phase 60Hz
220~240V
L
ELCB
R S T
Switch
ELCB
[Slave1]
[Slave2]
R S T
Switch
ELCB
ELCB
N
Power Line
(2 Wires Cable)
Communication Line
(2 Wires Cable)
Power Line
(3 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Pull Box
(Installer option)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
[Indoor Units]
Note
1) Field Wiring diagram is to be used as a guideline only. Wiring should comply with applicable local and national codes
2) ELCB must have function to prevent electrical short and over current at the same time .
3) Use copper wires only.
4) Unit must be grounded in compliance with the applicable local and national codes.
5) ELCB and fuse/breaker must install to the power line
Installation Manual 67
Electrical Wiring
WARNING
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage (without connection to pipe).
• Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install the main switch that can interrupt all the power sources in an integrated manner because this system consists of the
equipment utilizing the multiple power sources.
• If there exists the possibility of reversed phase, lose phase, momentary blackout or the power goes on and off while the
product is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase may break the compressor and other parts.
[Heat Pump]
Between Indoor and Master Outdoor unit
SODU
B
3
A
4
IDU
B
INTERNET DRY1 DRY2 GND 12V
A
B
3
A
4
3
4
Master
Outdoor Unit
SODU
B
68
Outdoor Unit
IDU
A
IDU
A
IDU
B
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
SODU
B
INTERNET DRY1 DRY2 GND 12V
A
B
SODU
B
The GND terminal at the main PCB is a ‘-’
terminal for dry contact.
It is not the point to make ground
connection.
• Make sure that terminal number of master
and slave outdoor units are
matched.(A-A,B-B)
A
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
A
Master
Outdoor Unit
Slave1
Outdoor Unit
Slave2
Outdoor Unit
Electrical Wiring
u Example Connection of Transmission Cable
[STAR type]
• Abnormal operation can be caused by communication defect, when connection of transmission
cable is installed like below figure(STAR type).
Installation Manual 69
ENGLISH
[BUS type]
• Connection of transmission cable must be installed like below figure between indoor unit to
outdoor unit.
Electrical Wiring
u UX2 Chassis Wire Connection (3Ø, 208/230V)
Left Side
Right Side
Main Power
Terminal Block
Main Power
Terminal Block
Power/Ground lines
Power/Ground lines
Ground Cable
Ground Cable
Over 50mm Gap
Over 50mm Gap
Communication line
Communication line
Front Side 1
Front Side 2
Main Power
Terminal Block
Main Power
Terminal Block
Ground Cable
Main Power
GroundBlock
Cable
Terminal
Power/Ground lines
Over
50mm Gap
Power/Ground lines
Communication line
Communication line
Over 50mm Gap
ODU-ODU
Communication line
Main Power Connection
Main PCB Connection
Main Power
Terminal Block
Main Power
Terminal Block
Insulation sleeves attachments
Ground Cable
ODU-ODU
Communication line
Fix firmly not to be displaced
Ground Cable
70
Outdoor Unit
ODU-IDU
Communication line
Electrical Wiring
u UX3 Chassis Wire Connection (3Ø, 208/230V)
ENGLISH
Right Side
Left Side
Main Power
Terminal Block
Main Power
Terminal Block
Main Power
Terminal Block
Power/Ground lines
Power/Ground lines
Ground Cable
Ground Cable
Over 50mm Gap
Over 50mm Gap
Communication line
Communication line
Front Side 1
Front Side 2
Main Power
Terminal Block
Main Power
Terminal Block
Ground Cable
Ground Cable
Main Power
Terminal Block
Power/Ground lines
Over
50mm Gap
Power/Ground lines
Communication line
Communication line
Over 50mm Gap
ODU-ODU
Communication line
Main Power Connection
Main PCB Connection
Main Power Terminal Block
Insulation sleeves attachments
Ground Cable
ODU-ODU
Communication line
ODU-IDU
Communication
line
Main Power
Terminal Block
Fix firmly not
to be displaced
Main Power Terminal Block
Insulation sleeves attachments
Ground Cable
Installation Manual 71
Electrical Wiring
u UX2 Chassis Wire Connection (3Ø, 460V)
Left Side
Right Side
Main Power
Terminal Block
Main Power
Terminal Block
Main Power
Terminal Block
Power/Ground lines
Power/Ground lines
Ground Cable
Ground Cable
Over 50mm Gap
Over 50mm Gap
Communication line
Communication line
Front Side 1
Front Side 2
Main Power
Terminal Block
Main Power
Terminal
Block
Main Power
Terminal Block
Main Power
GroundBlock
Cable
Terminal
Ground Cable
Power/Ground lines
Over
50mm Gap
Power/Ground lines
Communication line
ODU-ODU
Communication line
Communication line
Over 50mm Gap
Main Power Connection
Main PCB Connection
Main Power
Main Power
Main Power Terminal Block
TerminalTerminal
Block Block
Insulation sleeves attachments
Ground Cable
ODU-ODU
Communication line
Fix firmly not to be displaced
Main Power
Terminal Block
Ground Cable
72
Outdoor Unit
ODU-IDU
Communication line
Electrical Wiring
u UX3 Chassis Wire Connection (3Ø, 460V)
ENGLISH
Right Side
Left Side
Main Power
Terminal Block
Main Power
Terminal Block
Main Power
Terminal Block
Power/Ground lines
Power/Ground lines
Ground Cable
Ground Cable
Over 50mm Gap
Over 50mm Gap
Communication line
Communication line
Front Side 1
Front Side 2
Main Power
Terminal Block
Main Power
Terminal Block
Ground Cable
Ground Cable
Main Power
Terminal Block
Power/Ground lines
ODU-ODU
Communication line
Over
50mm Gap
Power/Ground lines
Communication line
Communication line
Over 50mm Gap
Main Power Connection
:
;
<
Main PCB Connection
Main Power Terminal Block
Insulation sleeves attachments
Ground Cable
ODU-ODU
Communication line
ODU-IDU
Communication
line
Main Power
Terminal Block
Fix firmly not
to be displaced
Main Power Terminal Block
Installation Manual 73
Electrical Wiring
Location of setting dip switch
n Heat Pump (Main PCB)
SW01B
SW02B
7 - Segment
SW02V
(Auto Addressing)
74
Outdoor Unit
Electrical Wiring
n Checking according to dip switch setting
1. You can check the setting values of the Master outdoor unit from the 7 segment LED.
The dip switch setting should be changed when the power is OFF.
2. It checks whether the input is properly performed without the bad contact of the dip switch or not
n Checking the setting of the Master unit
The number is sequentially appeared at the 7 segment in 5 seconds after applying the power. This number
represents the setting condition. (For example, represents R410A 28HP)
Master model code ‘ Slave1 model code ‘ Slave2 model code ‘ total capacity ‘ 2 ‘ 25 ‘ 140 or 160
1 ~255 : Master model code
1 ~255 : Slave1 model code
Refer to table code
1 ~255 : Slave2 model code
1 ~255 : Slave3 model code
8~42HP : HP number(sum of master capacity and slave capacity)
No display : cooling only
2 : heat pump
25 : normal
140 or 160 : Model Type (ARUN××BT3:140, ARUN××DT3:160)
}
Example) 28Hp, R410A
15 ’ 15 ’ 30 ’ 2 ’ 25 ’ 140 or 160
CAUTION
Product may not properly operate if the relevant DIP switch is not properly setup.
Model Code
Model Code
12
13
14
15
Unit (HP)
8
10
12
14
Unit
Ref.
Master &
Slave
R410A
Installation Manual 75
ENGLISH
DIP switch setting
Electrical Wiring
n Setting the DIP switch
ODU
setting
Function
• Heat pump
• If you set the Dip switch when power is on, the changed setting will not be applied immediately.
The changed setting will be enabled only when Power is reset or by pressing Reset button.
Index
Heating capacity up
IDU Fan RPM Control
Auto charging
Refrigerant Checking Function
Integrated test operation function (Cooling)
Integrated test operation function (Heating)
Inverter backup
Unit backup
Non-operation indoor unit EEV adjustment
Indoor unit target subcooling/overheating adjustment
Operation indoor unit EEV adjustment
Dry contact
Snow removal fuction
Forced defrost
Snow removal+Forced defrost
Forced overall defrost
Static pressure mode
Nigh low noise operation (Cooling only)
Night low noise operation (Cooling/Heating)
Pump down
Pump out
Forced oil return operation
Vacuum mode
Selector Fan/ All OFF
ODU Address setting
Master unit
Slave 1 unit
Slave 2 unit
1
●
●
●
●
●
2
3
4
5
6
●
●
●
●
●
7
8
9
10 11 12 13 14
●
●
ⅹ
ⅹ
ⅹ
ⅹ
●
●
●
●
ⅹ
ⅹ
ⅹ
ⅹ
ⅹ
●
●
ⅹ
●
●
ⅹ
●
ⅹ
●
ⅹ
ⅹ
ⅹ
ⅹ
●
ⅹ
●
ⅹ
●
●
●
ⅹ
ⅹ
ⅹ
●
●
●
ⅹ
●
ⅹ
●
●
ⅹ
●
●
ⅹ
ⅹ
ⅹ
ⅹ
●
●
●
ⅹ
●
ⅹ
ⅹ
ⅹ
●
ⅹ
ⅹ
●
●
CAUTION
1. ʻXʼ mark within the table means that the dip switch must be pulled down. If not, the function may not work properly.
2. If the applicable dip switch is not set properly, the product may not work properly.
3. When executing the test operation, check the operating condition of the indoor unit and only execute the operation
when all indoor units are stopped.
4. Auto test operation function does not work for the product where only one indoor unit is connected for use.
5. Cooling Only model is not working on functions of Heat Pump model.
76
Outdoor Unit
ⅹ
●
ⅹ
●
●
ⅹ
●
●
ⅹ
●
ⅹ
●
ⅹ
ⅹ
Electrical Wiring
ENGLISH
Automatic Addressing
• The address of indoor units would be set by auto addressing
1) Wait for 3 minutes after supplying power.
(Master and Slave outdoor units, indoor units)
2) Press RED button of the outdoor units for 5
seconds. (H/P : SW02B)
3) A “88” is indicated on 7-segment LED of the
outdoor unit PCB.
4) For completing addressing, 2~7 minutes are
required depending on numbers of connected
indoor units
5) Numbers of connected indoor units whose addressing is completed are indicated for 30
seconds on 7-segment LED of the outdoor
unit PCB
6) After completing addressing, address of each
indoor unit is indicated on the wired remote
control display window. (CH00, CH01,
CH02, ……, CH06 : Indicated as number of
connected indoor units)
n Heat Pump (Main PCB)
SW01B
SW02B
7 - Segment
SW02V
(Auto Addressing)
CAUTION
• In replacement of the indoor unit PCB, always perform Auto addressing setting
again (At that time, please check about using Independent power module to any
indoor unit.)
• If power supply is not applied to the indoor unit, operation error occur.
• Auto addressing is only possible on the master Unit.
• Auto addressing has to be performed after 3 minutes to improve communication.
Installation Manual 77
Electrical Wiring
u The Procedure of Automatic Addressing
Power On
Waiting 3 minutes
Press RED Button for 5 sec.
(H/P : SW02V)
7-segment LED
Auto addressing start
= 88
Don’t press RED Button
(H/P : SW02V)
Waiting about 2~7 minutes
7-segment LED
= 88
YES
OK
78
Outdoor Unit
NO
• Auto addressing setting end
Numbers of indoor unit connection set whose
addressing is completed are indicated for 30seconds
on 7-segment LED after completing setting
Check the connections
of transmission line
Indoor address number is displayed on wired remote control or
indoor unit display window. It is not an error message, will
disappeared when on/off button is pressed on remote control
ex) Display of 01, 02, ..., 15 means connection of 15 indoor
units and auto addressing is completed normally.
Electrical Wiring
Group Number setting for Indoor Units
① Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off.
② The transmission lines connected to INTERNET terminal should be connected to central control of Outdoor
Unti with care for their polarity( A ’ A, B ’ B )
③ Turn the whole system on.
④ Set the group and Indoor Unit number with a wired remote control.
⑤ To control several sets of Indoor Units into a group, set the group ID from 0 to F for this purpose.
Outdoor Units
[Heat Pump]
SODU
B
IDU
A
B
B
A
INTERNET DRY1 DRY2 GND 12V
A
B
B(D)
A
A(C)
Example) Group number setting
1 F
Group Indoor unit
1st number indicate the group number
2nd number point out indoor unit number
Group recognizing the simple central controller
No.0 group (00~0F)
No.1 group (10~1F)
No.2 group (20~2F)
No.3 group (30~3F)
No.4 group (40~4F)
No.5 group (50~5F)
No.6 group (60~6F)
No.7 group (70~7F)
No.8 group (80~8F)
No.9 group (90~9F)
No. A group (A0~AF)
No. B group (B0~BF)
No. C group (C0~CF)
No. D group (D0~DF)
No. E group (E0~EF)
No. F group (F0~FF)
Installation Manual 79
ENGLISH
Group Number setting
Electrical Wiring
Cool/Heat Selector Installation and Connection
Using Cool/Heat Selector Installation and Connection
- Connect wires to the cool/heat selector as shown in below figure
- Insert the wire in terminal by pushing “push” button
- Set the Dip SW of main PCB in master outdoor unit
Push Button
- Insert wire method -
¨≠GND
¨≠GND
< Outdoor Main PCB >
¨
≠
shows field wiring
3
1
4
2
Push arrow direction.
¨
≠
GND
3
1
4
2
GND
connected wiring
Insert wire to connector.
<Outdoor Dry Contact Back Side >
❈ Communication line length can be maximum 300m, use communication line as thick as 1.25mm2.
Without Cool/Heat Selector Installation and Connection
In case, try to set mode without Cool/Heat Selector and try to use other switch except from LG Outdoor
Cool/Heat Selector in field.
Connect signal terminal block as below figure and description.
- How to set mode without Cool/Heat Selector
• Cooling Mode Setting
¿ ‘ GND Connection
¡ ‘ Off (Open)
GND
• Heating Mode Setting
¿ ‘ GND Connection
¡ ‘ GND Connection
GND
• Fan/ All OFF Mode Setting
¿ ‘ Off (Open)
¡ ‘ GND Connection
GND
80
Outdoor Unit
Test Run
ENGLISH
Test Run
Checks Before Test Run
1
Check to see whether there is any refrigerant leakage, and slack of power or transmission cable.
2
Confirm that 500 V megger shows 2 MΩ or more between power supply terminal block and ground. Do
not operate in the case of 2 MΩ or less.
NOTE: Never carry out megaohm check over terminal control board. Otherwise the control board
would be broken.
Immediately after mounting the unit or after leaving it turned off for an extended length of time,
the resistance of the insulation between the power supply terminal board and the ground may
decrease to approx. 2 MΩ as a result of refrigerant accumulating in the internal compressor.
If the insulation resistance is less than 2 MΩ, turning on the main power supply and energizing
the crankcase heater for more than 6 hours will cause the refrigerant to evaporate, increasing
the insulation resistance.
3
Check if high/low pressure common pipe, liquid pipe and gas pipe valves are fully opened.
NOTE: Be sure to tighten caps.
4
Check if there are any problems in automatic addressing or not:
Check and confirm that there are no error messages in the display of indoor units or remote controls
and LED in outdoor units.
CAUTION
when cutting main power of the Multi V
• Always apply main power of the outdoor unit during use of product
(cooling season/heating season).
• Always apply power 6 hours in advance to heat the crank case heater where performing test run
after installation of product. It may result in burning out of the compressor if not preheating the
crank case with the electrical heater for more than 6 hours.(In case of the outdoor temperatue
below 10°C)
Installation Manual 81
Test Run
How to Cope with Test Run Abnormality
The phenomena from main component failure
Component
Phenomenon
Not operating
Outdoor
EEV
Check method and Trouble shooting
Motor insulation broken Check resistance between terminals and
chassis
Strainer clogged
Change strainer
Oil leakage
Check oil amount after opening oil port
Stop during running
Motor insulation failure
Check resistance between terminals and
chassis
Abnormal noise
during running
R-S-T misconnection
Check compressor R-S-T connection
High pressure error
at cooling
Motor failure,
Check the outdoor fan operation after being
bad ventilation around turned the outdoor units off for some time.
outdoor heat exchanger Remove obstacles around the outdoor units
Heating failure, frequent defrosting
Bad connector contact
Check connector
No operating sound
at applying power
Coil failure
Check resistance between terminals
Heating failure,
frozen outdoor heat
exchanger part
EEV clogged
Service necessary
EEV clogged
Low pressure error
or discharge temperature error
Service necessary
Compressor
Outdoor
fan
Cause
When system fault occurs, the error code is displayed at indoor unit display or remote control display,
the trouble shooting guide is in the service manual
Add Note : For detailed information, please refer Multi V Troubleshooting Guide Book
82
Outdoor Unit
Test Run
Start
DIP Switch Settings
3 minutes
past after power
reset
YES
- Setting1
(Refrigerant Auto Recharge)
NO
- Setting2
(Refrigerant Quantity Auto Decide)
DIP switch set
- Setting3
(Integrated Test Run - cooling)
Setting 1
Setting 2
Setting 3
- Setting4
(Integrated Test Run - heating)
Setting 4
Warning : Please reset before starting this function
Note 3)
Press black button
for 2 seconds
Sensor Normal
NO
Press black button for
5 seconds
YES
NO
Setting 1
Setting 2
Setting 3
Refrigerant
Auto Recharge
Refrigerant
Auto decide
Setting 4
Display Error
Press black button for 2 seconds
End
All DIP switches OFF and press black
button for 2 seconds
E: Cooling
F: Heating
@ Data Reset and Wait
Start Inspection of each Function
Note 1. Outdoor Unit number of temperature sensors is different according to each chassis.
Heat Pump
UX2(1 Comp)
UX3 (2 Comp)
6
7
Note 2. Please check the sensor that is found abnormal.
Note 3. Each step is displayed on the Main PCB LED.
Note 4. Please refer to the sensor error descriptions on the next page.
WARNING
1. Please confirm if auto addressing function was executed. (Check the number of installed indoor units)
2. Error may occur when the sensor is abnormal according to the installed location and the temperature
conditions. When error occurs, please check each sensor and decide faultiness.
Installation Manual 83
ENGLISH
Sensor Checking Function
Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or
not. 3 indoor temperature sensors, 10 outdoor temperature sensor Note 1), 2 outdoor pressure sensors.
Test Run
Refrigerant Auto Charging
This function charges appropriate amount of refrigerant automatically through cycle operation.
It can be used when refrigerant amount Isn't certain because of SVC and leakage.
Start
Wait for 3 min. after power reset
Set the Dip S/W.
(Refer to DIP S/W setting)
Press the black button.
(Press until ‘508’ is displayed)
Press the black button.
IDU runs with cooling mode In designated order.
Is it necessary to
charge refrigerant?
Yes
*1)
No
Press the black button
Refrigerant Auto
Charging Process
IDU and ODU are turned off when Auto Charging
is completed. Close the valve.
*2)
Press the black button
Press the black button for 2 sec. after turning off
all of dip S/W.
Completed.
DIP Switch Settings
Warning : Please reset Main PCB before starting this function
Note
1. After installing the refrigerant charging device,
as shown in figure, open the valve
2. In case air temperature is out of guaranteed temperature, it may end without performing Auto charging
3. Refrigerant charging Time may change according to the charging amount. (Abt. 1.5min/lbs)
84
Outdoor Unit
Test Run
ENGLISH
Pip
Liquid Pipe
Gas Pipe
Pip
manifold
Capillary Assembly
Procedure
1. Arrange manifold,capillary assembly, refrigerant vessel and scale
2. Connect manifold to the gas pipe service valve of ODU as shown in the figure.
3. Connect manifold and Capillary tube.
Use designated capillary assembly only.
If designated capillary assembly isn't used, the system may get damaged.
4. Connect capillary and refrigerant vessel.
5. Purge hose and manifold.
6. After
Is displayed, open the valve and charge the refrigerant
n Error contents about auto refrigerant charging function
1.
: Temperature Range Error (In case that IDU or ODU is out of range)
2.
: Low Pressure Descent Error (In case the system runs at low pressure limit for over 10 minutes)
3.
: Judging rapid refrigerant inflow ( In case the liquid refrigerant flows in because of not using designated Capillary Assembly)
4.
: Instability Error( In case the high/low pressure target doesn't get satisfied for some time
after the starting operation)
CAUTION
1. Guaranteed temperature range (Error will occur if temperature is out of range)
IDU : 20°C(68°F) ~ 32°C(90°F)
ODU : 0°C(32°F) ~ 43°C (109°F)
This temperature range is specifically for accurate refrigerant charging and is irrelative of operation temperature range
2. For refrigerant charging, use designated device only. (Capillary Assembly Set)
3. Set the IDU wired remote controller temperature sensing mode as IDU
4. Be careful that IDU should not be thermo off.
Installation Manual 85
Test Run
Refrigerant Checking Function
This function judges refrigerant leakage and overcharging
It can be used with refrigerant auto charging function.
Inspection Start
Press black button for 2 seconds
Display Error
YES
NO
Proper Temperature
NO
Thermo off indoor unit
YES
Decide Refrigerant Quantity
Display Error
Based on Refrigerant Quantity
Press black button for 2 seconds
End
Too much
Refrigerant
Not enough
Refrigerant
Cannot tell
Quantity
Refrigerant
Quantity
Normal
Gas/Liquid
pipe direct
connection
Press black button for 2 seconds
Data Reset and Wait
Indoor Unit OFF
DIP Switch Settings
Warning : Please reset Main PCB before starting this function
Note
1. In case air temperature is out of guaranteed temperature, refrigerant checking function may end without performing refrigerant
checking. Use guaranteed temperature range only.
2. During the process of judging refrigerant amount, if the cycle isn't stable, refrigerant checking function may end without performing
refrigerant checking.
86
Outdoor Unit
Test Run
2. Set IDU wired remote controller temperature sensor setting as 'IDU'.
3. Make certain that IDU doesn't run with thermo off mode during operation.
[ Error contents about auto refrigerant charging function ]
1.
: Temperature Range Error (In case that IDU or ODU is out of range)
2.
: System Unstable Error (In case, After 45 min operating the system, it does not be stable)
How to Cope with Result of Refrigerant checking
1. If the temperature is not in guaranteed Temperature range, the system will not execute Refrigerant checking and the system will be OFF.
2. Excess of Refrigerant(619)
After remove the 20% of calculated total refrigerant, recharge the refrigerant by using Refrigerant Auto
Charging Function.
3. Scarcity of Refrigerant(629)
Charge the refrigerant by using Refrigerant Auto Charging Function.
4. Impossible to Judge(639)
IF the system is not in order, check the other problem except refrigerant.
Installation Manual 87
ENGLISH
CAUTION
1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range)
IDU : 20°C(68°F) ~ 32°C(90°F)
ODU : 0°C(32°F) ~ 43°C (109°F)
Test Run
Integrated Test Running Function_Cooling Mode (Setting 3)
This function is checking process for normal operation of parts and system On operating system.
• All processes carry out included refrigerant amount judge logic and check normal condition of parts on cooling mode.
• This function check only normal condition of parts on heating mode.
• Saved data can check using LGMV.
Start
Press the black button for 2 sec
All IDU operation on
Cooling mode
Temp. Condition
Error Display
Yes
Thermo off
IDU judge
No
Yes
Error Display
Refrigerant amount judge
during all IDU operation
data on Test Runing(15min)
Press the black button for 2 sec
1 IDU operation
End
Note 1
1 IDU operation data
(10min)
Press the black button for 2 sec.
after turning off all of Dip switch.
Completed
DIP Switch Settings
Warning : Please reset Main PCB before starting this function
Note
1. Judge the normal condition refer to report of Test Running.
88
Outdoor Unit
Test Run
This function is checking process for normal operation of parts and system On operating system.
• All processes carry out included refrigerant amount judge logic and check normal condition of parts on heating
mode.
• This function check only normal condition of parts on heating mode.
• Saved data can check using LGMV.
Start
Press the black button for 2 sec.
Temp. Condition
No
Error Display
Yes
Error Display
Note 1
All IDU operation data(10min)
End
1 IDU operation
Note 1
Press the black button for 2 sec.
after turning off all of Dip switch.
1 IDU operation data(10min)
Completed
DIP Switch Settings
Warning : Please reset Main PCB before starting this function
Note
1. Judge the normal condition refer to report of Test Running.
Installation Manual 89
ENGLISH
Integrated Test Running Function_Heating Mode (Setting 4)
Test Run
Night Silent Operation
In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night
which has low cooling load.
Max. RPM setting method
RPM / Time Settings
Capacity
Capacity
(Hp)
Step
Set the DIP S/W
8
10~14
Fan Maximum RPM
1
Reset the power
8
6.5
9
10.5
3
5
12
4
8
6.5
9
10.5
6
5
12
7
8
6.5
9
10.5
5
12
2
Setting the Fan Max. RPM Note 1)
790
5
680
8
Setting Complete
620
900
800
780
9
Note 1)
Setting Method for Fan Max. RPM
Step
1
2
3
4
5
6
7
8
9
Black Button
1 time
2 time
3 time
4 time
5 time
6 time
7 time
8 time
9 time
Noise
Red Button
1 time
1 time
1 time
1 time
1 time
1 time
1 time
1 time
1 time
Capacity
Capacity(HP)
Step
8
Standard
58
62
①
55
59
②
52
56
③
49
53
Warning : Please reset Main PCB before starting this function
CAUTION
1. Request installer to set the function during installation.
2. In case the function is not used, set the dip S/W OFF and reset the power.
3. If ODU RPM changes, cooling capacity may go down.
Outdoor Unit
10~14
Max. RPM Noise(dB)
DIP Switch Settings
90
Judgment Operation
Time(Hr) Time(Hr)
Test Run
This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement.
Vacuum mode setting method
Vacuum mode cancellation method
ODU power reset
Set the DIP S/W OFF
Power reset
Set the DIP S/W ON
Vacuum mode cancellation
Press the black button Main PCB (5 sec.)
Vacuum mode setting
ODU V/V OPEN
Main EEV, SC EEV OPEN
IDU EEV OPEN
DIP Switch Settings
Warning : Please reset Main PCB before starting this function
CAUTION
ODU operation stops during vacuum mode.
Installation Manual 91
ENGLISH
Vacuum Mode
Test Run
Static pressure compensation mode
This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at fan
discharge of ODU.
n Static pressure compensation dip S/W setting method
High static pressure mode : Set DIP S/W
Static pressure compensation mode setting
method
Static pressure compensation mode cancellation
method
Set the DIP S/W ON
DIP switch OFF
Power Reset
Power Reset
Static pressure compensation mode is set
Static pressure compensation mode is cancelled
DIP Switch Settings
Warning : Please reset Main PCB before starting this function
Note
How to set the unit to high ESP :
1) Standard ESP (External Static Pressure) : 4mmH2O (39.2Pa)
2) High ESP (External Static Pressure) : 8mmH2O (78.4Pa)
‘ The setting of dip S/W is needed. (Refer to above operating method)
92
Outdoor Unit
Test Run
Error Indicator
• This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
• Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of
outdoor unit control board as shown in the table.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurrence, if error is released, error LED is also released simultaneously.
Error Display
1st,2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.
Ex) 211 : No.21 error of master unit
213 : No.21 error of slave2
011 ’ 051 : No.105 error of master unit
h Refer to the DX-Venitilation manual for DX-Venitilation error code
Display
Title
Cause of Error
Indoor unit related error
Outdoor unit related error
0
1
-
Air temperature sensor of indoor unit
0
2
-
Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short
0
3
-
Communication error : wired remote controller ÷ indoor unit
Failing to receive wired remote controller signal in indoor
unit PCB
0
4
-
Drain pump
Malfunction of drain pump
0
5
-
Communication error : outdoor unit ÷ indoor unit
Failing to receive outdoor unit signal in indoor unit PCB
0
6
-
Outlet pipe temperature sensor of indoor
unit
Outlet pipe temperature sensor of indoor unit is open or
short
0
9
-
Indoor EEPROM Error
In case when the serial number marked on EEPROM of Indoor unit is 0 or FFFFFF
1
0
-
Poor fan motor operation
Disconnecting the fan motor connector/Failure of indoor
fan motor lock
1
7
-
Inlet Air temperature sensor of FAU
Air temperature sensor of indoor unit is open or short
1
Master Outdoor Unit Inverter Compressor
Master Outdoor Unit Inverter Compressor Drive IPM Fault
IPM Fault
2
Slave1 Outdoor Unit Inverter Compressor
Slave1 Outdoor Unit Inverter Compressor Drive IPM Fault
IPM Fault
3
Slave2 Outdoor Unit Inverter Compressor
IPM Fault
1
Inverter Board Input Over Current(RMS) of Master Outdoor Unit Inverter Board Input Current excess
Master Outdoor Unit
(RMS)
2
Inverter Board Input Over Current(RMS) of Slave1 Outdoor Unit Inverter Board Input Current excess
Slave1 Outdoor Unit
(RMS)
3
Inverter Board Input Over Current(RMS) of Slave2 Outdoor Unit Inverter Board Input Current excess
Slave2 Outdoor Unit
(RMS)
2
2
1
2
Air temperature sensor of indoor unit is open or short
Slave2 Outdoor Unit Inverter Compressor Drive IPM Fault
Installation Manual 93
ENGLISH
Self-Diagnosis Function
Test Run
Display
Title
Cause of Error
Master Outdoor Unit Inverter Com- DC charging is not performed at Master Outdoor Unit
1
after starting relay turn on.
pressor DC link Low Voltage
2
2
3
4
2
Slave1 Outdoor Unit Inverter Com- DC charging is not performed at Slave1 Outdoor Unit
after starting relay turn on.
pressor DC link Low Voltage
3
Slave2 Outdoor Unit Inverter Com- DC charging is not performed at Slave2 Outdoor Unit
after starting relay turn on.
pressor DC link Low Voltage
1 Master Outdoor Unit High Pressure Switch
System is turned off by Master Outdoor Unit high pressure switch.
2 Slave1 Outdoor Unit High Pressure Switch
System is turned off by slave1 Outdoor Unit high pressure switch.
3 Slave2 Outdoor Unit High Pressure Switch
System is turned off by slave2 Outdoor Unit high pressure switch.
1 Master Outdoor Unit Input Voltage Master Outdoor Unit(208/230V) input voltage is over 300V or below 140V
High/ Low Voltage
Master Outdoor Unit(460V) input voltage is over 487V or below 270V
2
5
2 Slave1 Outdoor Unit Input Voltage Slave1 Outdoor Unit(208/230V) input voltage is over 300V or below 140V
High/ Low Voltage
Slave1 Outdoor Unit(460V) input voltage is over 487V or below 270V
3 Slave2 Outdoor Unit Input Voltage Slave2 Outdoor Unit(208/230V) input voltage is over 300V or below 140V
High/ Low Voltage
Slave2 Outdoor Unit(460V) input voltage is over 487V or below 270V
Outdoor unit related error
1 Master Outdoor Unit Inverter Com- The First Start Failure by Master Outdoor Unit Inverter
pressor Start Failure
Compressor Abnormality
2
6
2 Slave1 Outdoor Unit Inverter Com- The First Start Failure by Slave1 Outdoor Unit Inverter
pressor Start Failure
Compressor Abnormality
3 Slave2 Outdoor Unit Inverter Com- The First Start Failure by Slave2 Outdoor Unit Inverter
pressor Start Failure
Compressor Abnormality
2
8
Master Outdoor Unit Inverter DC
1 link High Voltage
System is turned off by Master Outdoor Unit DC Voltage Over Charging
Slave1 Outdoor Unit Inverter DC
2 link High Voltage
System is turned off by Slave1 Outdoor Unit DC Voltage Over Charging
Slave2 Outdoor Unit Inverter DC
3 link High Voltage
System is turned off by Slave2 Outdoor Unit DC Voltage Over Charging
Master Outdoor Unit Inverter Compressor Fault OR
1 Master Outdoor Unit Inverter ComDrive Fault
pressor Over Current
2
9
Slave1 Outdoor Unit Inverter Compressor Fault OR
2 Slave1 Outdoor Unit Inverter ComDrive Fault
pressor Over Current
Slave2 Outdoor Unit Inverter Compressor Fault OR
3 Slave2 Outdoor Unit Inverter ComDrive Fault
pressor Over Current
3
3
94
0
2
1
Master Outdoor Unit Constant Speed Com- System is turned off by Master Outdoor Uunit Constant Speed Compressor2 High Discharge Temperature
pressor2 High Discharge Temperature
2
Slave1 Outdoor Unit Constant Speed Com- System is turned off by Slave1 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature
pressor2 High Discharge Temperature
3
Slave2 Outdoor Unit Constant Speed Com- System is turned off by Slave2 Outdoor Unit Constant Speed Compressor2 High Discharge Temperature
pressor2 High Discharge Temperature
1
Master Outdoor Unit Inverter Compressor
High Discharge Temperature
System is turned off by Master Outdoor Unit Inverter Compressor
High Discharge Temperature
2
Slave1 Outdoor Unit Inverter Compressor
High Discharge Temperature
System is turned off by Slave1 Outdoor Unit Inverter Compressor
High Discharge Temperature
3
Slave2 Outdoor Unit Inverter Compressor
Discharge High Temperature
System is turned off by Slave2 Outdoor Unit Inverter Compressor
High Discharge Temperature
Outdoor Unit
Test Run
Display
Title
Cause of Error
3
3
2
Slave1 Outdoor Unit Constant Speed Com- System is turned off by Slave1 Outdoor Unit Constant Speed Compressor1 High Discharge Temperature
pressor1 High Discharge Temperature
3
Slave2 Outdoor Unit Constant Speed Com- System is turned off by Slave2 Outdoor Unit Constant Speed Compressor1 High Discharge Temperature
pressor1 High Discharge Temperature
High Pressure of Master Outdoor Unit
System is turned off by excessive increase of high pressure of Master Outdoor Unit
High Pressure of Slave1 Outdoor Unit
System is turned off by excessive increase of high pressure of
Slave1 Outdoor Unit
High Pressure of Slave2 Outdoor Unit
System is turned off by excessive increase of high pressure of
Slave2 Outdoor Unit
Low Pressure of Master Outdoor Unit
System is turned off by excessive decrease of low pressure of Master Outdoor Unit
Low Pressure of Slave1 Outdoor Unit
System is turned off by excessive decrease of low pressure of
Slave1 Outdoor Unit
Low Pressure of Slave2 Outdoor Unit
System is turned off by excessive decrease of low pressure of
Slave2 Outdoor Unit
1
Master Outdoor Unit Low Condensing
Ratio Limited
Master Outdoor Unit stayed under low condensing limit for 3 minutes
2
Slave1 Outdoor Unit Low Condensing
Ratio Limited
Slave1 Outdoor Unit stayed under low condensing limit for 3 minutes
3
Slave2 Outdoor Unit Low Condensing
Ratio Limited
Slave2 Outdoor Unit stayed under low condensing limit for 3 minutes
1
Master Outdoor Unit Inverter Compressor
CT Sensor Fault
Master Outdoor Unit Inverter Compressor CT Sensor open or
short
2
Slave1 Outdoor Unit Inverter Compressor
CT Sensor Fault
Slave1 Outdoor Unit Inverter Compressor CT Sensor open or
short
3
Slave2 Outdoor Unit Inverter Compressor
CT Sensor Fault
Slave2 Outdoor Unit Inverter Compressor CT Sensor open or
short
1
3
4
2
3
Outdoor unit related error
1
3
5
2
3
3
4
4
4
4
6
0
1
2
3
Master Outdoor Unit Inverter Compressor
1 Discharge Temperature Sensor Fault
Master Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or short
2
Slave1 Outdoor Unit Inverter Compressor
Discharge Temperature Sensor Fault
Slave1 Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or short
3
Slave2 Outdoor Unit Inverter Compressor
Discharge Temperature Sensor Fault
Slave2 Outdoor Unit Inverter Compressor Discharge Temperature Sensor open or short
1 Master Outdoor Unit Low Pressure Sensor Fault
Master Outdoor Unit Low Pressure Sensor open or short
2 Slave1 Outdoor Unit Low Pressure Sensor Fault
Slave1 Outdoor Unit Low Pressure Sensor open or short
3 Slave2 Outdoor Unit Low Pressure Sensor Fault
Slave2 Outdoor Unit Low Pressure Sensor open or short
1 Master Outdoor Unit High Pressure Sensor Fault
Master Outdoor Unit High Pressure Sensor open or short
2 Slave1 Outdoor Unit High Pressure Sensor Fault
Slave1 Outdoor Unit High Pressure Sensor open or short
3 Slave2 Outdoor Unit High Pressure Sensor Fault
Slave2 Outdoor Unit High Pressure Sensor open or short
Installation Manual 95
ENGLISH
Master Outdoor Unit Constant Speed Com- System is turned off by Master Outdoor Uunit Constant Speed Com1
pressor1 High Discharge Temperature
pressor1 High Discharge Temperature
Test Run
Display
4
4
Outdoor unit related error
4
4
4
4
96
4
5
6
7
8
9
Title
Cause of Error
Master Outdoor Unit Air Tempera1 ture Sensor Fault
Master Outdoor Unit Air Temperature Sensor open or
short
Slave1 Outdoor Unit Air Tempera2 ture Sensor Fault
Slave1 Outdoor Unit Air Temperature Sensor open or
short
Slave2 Outdoor Unit Air Tempera3 ture Sensor Fault
Slave2 Outdoor Unit Air Temperature Sensor open or
short
Master Outdoor Unit Heat Ex1 changer Temperature Sensor
(Front side) Fault
Master Outdoor Unit Heat Exchanger Temperature
Sensor(Front side) open or short
Slave1 Outdoor Unit Heat Ex2 changer Temperature Sensor
(Front side) Fault
Slave1 Outdoor Unit Heat Exchanger Temperature
Sensor (Front side) open or short
Slave2 Outdoor Unit Heat Ex3 changer Temperature Sensor
(Front side) Fault
Slave2 Outdoor Unit Heat Exchanger Temperature
Sensor(Front side) open or short
1
Master Outdoor Unit Suction Temperature Sensor Fault
Master Outdoor Unit Suction Temperature Sensor open
or short
2
Slave1 Outdoor Unit Suction Temperature Sensor Fault
Slave1 Outdoor Unit Suction Temperature Sensor open
or short
3
Slave2 Outdoor Unit Suction Temperature Sensor Fault
Slave2 Outdoor Unit Suction Temperature Sensor open
or short
Master Outdoor Unit Constant
1 Speed Compressor1 Discharge
Temperature Sensor Fault
Master Outdoor Unit Constant Speed Compressor1
Discharge Temperature Sensor open or short
Slave1 Outdoor Unit Constant
2 Speed Compressor1 Discharge
Temperature Sensor Fault
Slave1 Outdoor Unit Constant Speed Compressor1
Discharge Temperature Sensor open or short
Slave2 Outdoor Unit Constant
3 Speed Compressor1 Discharge
Temperature Sensor Fault
Slave2 Outdoor Unit Constant Speed Compressor1
Discharge Temperature Sensor open or short
Master Outdoor Unit Constant
1 Speed Compressor2 Discharge
Temperature Sensor Fault
Master Outdoor Unit Constant Speed Compressor 2
Discharge Temperature Sensor open or short
Slave1 Outdoor Unit Constant
2 Speed Compressor2 Discharge
Temperature Sensor Fault
Slave1 Outdoor Unit Constant Speed Compressor 2
Discharge Temperature Sensor open or short
Slave2 Outdoor Unit Constant
3 Speed Compressor2 Discharge
Temperature Sensor Fault
Slave2 Outdoor Unit Constant Speed Compressor 2
Discharge Temperature Sensor open or short
1
Master Outdoor Unit Faulty IPM
Temperature Sensor
Master Outdoor Unit IPM Temperature Sensor
short/open
2
Slave1 Outdoor Unit Faulty IPM
Temperature Sensor
Slave1 Outdoor Unit IPM Temperature Sensor
short/open
Slave2 Outdoor Unit Faulty IPM
3 Temperature Sensor
Slave2 Outdoor Unit IPM Temperature Sensor
short/open
Outdoor Unit
Test Run
Display
5
5
Outdoor unit related error
5
5
5
5
6
6
6
0
1
2
3
4
7
9
0
7
9
Cause of Error
1
Omitting connection of Master outdoor unit
2
Omitting connection of R, S, T
power of Slave1 Outdoor Unit
Omitting connection of Slave1 Outdoor Unit
3
Omitting connection of R, S, T
power of Slave2 Outdoor Unit
Omitting connection of Slave2 Outdoor Unit
1
Excessive capacity of indoor
units
Excessive connection of indoor units compared to capacity of Outdoor Unit
1
Transmission error : inverter
PCB ’ Main PCB
Failing to receive inverter signal at main PCB of Master
Outdoor Unit
2
Transmission error : inverter
PCB ’ Main PCB
Failing to receive inverter signal at main PCB of Slave1
Outdoor Unit
3
Transmission error : inverter
PCB ’ Main PCB
Failing to receive inverter signal at main PCB of Slave2
Outdoor Unit
1
Transmission error : indoor unit ’ Failing to receive indoor unit signal at main PCB of
Outdoor Unit .
main PCB of Outdoor Unit
1
Reverse connection of R, S, T
power of Master Outdoor Unit
Reverse connection or omitting connection of R, S, T
power of Master Outdoor Unit
2
Reverse connection of R, S, T
power of Slave1 Outdoor Unit
Reverse connection or omitting connection of R, S, T
power of Slave1 Outdoor Unit
3
Reverse connection of R, S, T
power of Slave2 Outdoor Unit
Reverse connection or omitting connection of R, S, T
power of Slave2 Outdoor Unit
1
Master Outdoor Unit Communication
Error with Inverter Controller
Master Outdoor Unit Controller part cannot receive inverter
control signals (usually happens after on-boarding)
2
Slave1 Outdoor Unit Communication
Error with Inverter Controller
Slave1 Outdoor Unit Controller part cannot receive inverter
control signals (usually happens after on-boarding)
3
Slave2 Outdoor Unit Communication
Error with Inverter Controller
Slave2 Outdoor Unit Controller part cannot receive inverter
control signals (usually happens after on-boarding)
1
Error of series installation
In the case of installing smaller outdoor unit as master
unit
1
Inverter PCB EEPROM Error of
Master Outdoor Unit
Access Error of Inverter PCB of Master Outdoor Unit
2
Inverter PCB EEPROM Error of
Slave1 Unit
Access Error of Inverter PCB of Slave1 Outdoor Unit
3
Inverter PCB EEPROM Error of
Slave2 Unit
Access Error of Inverter PCB of Slave2 Outdoor Unit
1
Master Outdoor Unit Fan Lock
Restriction of Master Outdoor Unit
2
Slave1 Outdoor Unit Fan Lock
Restriction of Slave1 Outdoor Unit
3
Slave2 Outdoor Unit Fan Lock
Restriction of Slave2 Outdoor Unit
1
Constant1 CT Sensor Error of
Master Outdoor Unit
Constant1 CT Sensor open or short of Master Outdoor
Unit
2
Constant1 CT Sensor Error of
Slave1 Outdoor Unit
Constant1 CT Sensor open or short of Slave1 Outdoor
Unit
3
Constant1 CT Sensor Error of
Slave2 Outdoor Unit
Constant1 CT Sensor open or short of Slave2 Outdoor
Unit
Installation Manual 97
ENGLISH
5
Title
Omitting connection of R, S, T
power of Master Outdoor Unit
Test Run
Display
7
7
Outdoor unit related error
7
7
7
7
8
8
98
0
3
5
6
7
9
6
7
Title
Cause of Error
Constant2 CT Sensor Error of
1
Master Outdoor Unit
Constant2 CT Sensor open or short of Master Outdoor
Unit
2
Constant2 CT Sensor Error of
Slave1 Outdoor Unit
Constant2 CT Sensor open or short of Slave1 Outdoor
Unit
3
Constant2 CT Sensor Error of
Slave2 Outdoor Unit
Constant2 CT Sensor open or short of Slave2 Outdoor
Unit
1
Instant Over Current(Peak) of
Master Outdoor Unit PFC
Instant Over Current(Peak) of Master Outdoor Unit
PFC
2
Instant Over Current(Peak) of
Slave1 Outdoor Unit PFC
Instant Over Current(Peak) of Slave1 Outdoor Unit
PFC
3
Instant Over Current(Peak) of
Slave2 Outdoor Unit PFC
Instant Over Current(Peak) of Slave2 Outdoor Unit
PFC
1
Master Outdoor Unit Fan CT Sensor Error
Master Outdoor Unit Fan CT Sensor open or short
2
Slave1 Outdoor Unit Fan CT Sensor Error
Slave1 Outdoor Unit Fan CT Sensor open or short
3
Slave2 Outdoor Unit Fan CT Sensor Error
Slave2 Outdoor Unit Fan CT Sensor open or short
1
Master Outdoor Unit Fan DC Link
High Voltage Error
Master Outdoor Unit Fan DC Link High Voltage Error
2
Slave1 Outdoor Unit Fan DC Link
High Voltage Error
Slave1 Outdoor Unit Fan DC Link High Voltage Error
3
Slave2 Outdoor Unit Fan DC Link
High Voltage Error
Slave2 Outdoor Unit Fan DC Link High Voltage Error
1
Master Outdoor Unit Fan Over
Current Error
Master Outdoor Unit Fan Current is over 10A
2
Slave1 Outdoor Unit Fan Over
Current Error
Slave1 Outdoor Unit Fan is over 10A
3
Slave2 Outdoor Unit Fan Over
Current Error
Slave2 Outdoor Unit Fan is over 10A
1
Master Outdoor Unit Fan Start
Failure Error
Master Outdoor Unit Fan First Position Sensing Failure
2
Slave1 Outdoor Unit Fan Start
Failure Error
Slave1 Outdoor Unit Fan First Position Sensing Failure
3
Slave2 Outdoor Unit Fan Start
Failure Error
Slave2 Outdoor Unit Fan First Position Sensing Failure
1
Master Outdoor Unit Main PCB
EEPROM Error
Communication Fail Between Master Outdoor Unit
Main MICOM and EEPROM or omitting EEPROM
2
Slave1 Outdoor Unit Main PCB
EEPROM Error
Communication Fail Between Slave1 Outdoor Unit
Main MICOM and EEPROM or omitting EEPROM
3
Slave2 Outdoor Unit Main PCB
EEPROM Error
Communication Fail Between Slave2 Outdoor Unit
Main MICOM and EEPROM or omitting EEPROM
1
Master Outdoor Unit Fan PCB
EEPROM Error
Communication Fail Between Master Outdoor Unit Fan
MICOM and EEPROM or omitting EEPROM
2
Slave1 Outdoor Unit Fan PCB
EEPROM Error
Communication Fail Between Slave1 Outdoor Unit Fan
MICOM and EEPROM or omitting EEPROM
3
Slave2 Outdoor Unit Fan PCB
EEPROM Error
Communication Fail Between Slave2 Outdoor Unit Fan
MICOM and EEPROM or omitting EEPROM
Outdoor Unit
Test Run
Display
Title
Outdoor unit related error
Cause of Error
Failing to receive Slave Unit signal at main PCB of
Master Outdoor Unit
Communication Error Between
1 0 4 2 Slave1 Outdoor Unit and Other
Outdoor Unit
Failing to receive master and other Slave Unit signal at
main PCB of Slave1 Outdoor Unit
Communication Error Between
3 Slave2 Outdoor Unit and Other
Outdoor Unit
Failing to receive master and other Slave Unit signal at
main PCB of Slave2 Outdoor Unit
1
Master Outdoor Unit Fan PCB
Communication Error
Failing to receive fan signal at main PCB of master
unit.
1 0 5 2
Slave1 Outdoor Unit Fan PCB
Communication Error
Failing to receive fan signal at main PCB of Slave1
unit.
3
Slave2 Outdoor Unit Fan PCB
Communication Error
Failing to receive fan signal at main PCB of Slave2
unit.
Master Outdoor Unit FAN IPM
1 Fault Error
Instant Over Current at Master Outdoor Unit Fan IPM
Slave1 Outdoor Unit FAN IPM
1 0 6 2 Fault Error
Instant Over Current at Slave1 Outdoor Unit Fan IPM
Slave2 Outdoor Unit FAN IPM
3 Fault Error
Instant Over Current at Slave2 Outdoor Unit Fan IPM
Master Outdoor Unit Fan DC Link
1 Low Voltage Error
Master Outdoor Unit(208/230V) Fan DC Link Input Voltage is under 140V
Master Outdoor Unit(460V) Fan DC Link Input Voltage is under 380V
Slave1 Outdoor Unit Fan DC Link
1 0 7 2 Low Voltage Error
Slave1 Outdoor Unit(208/230V) Fan DC Link Input Voltage is under 140V
Slave1 Outdoor Unit(460V) Fan DC Link Input Voltage is under 380V
Slave2 Outdoor Unit Fan DC Link
3 Low Voltage Error
Slave2 Outdoor Unit(208/230V) Fan DC Link Input Voltage is under 140V
Slave2 Outdoor Unit(460V) Fan DC Link Input Voltage is under 380V
1
Master Outdoor Unit Liquid pipe
Temperature Sensor Error
Liquid pipe temperature sensor of Master Outdoor
Unit is open or short
1 1 3 2
Slave1 Outdoor Unit Liquid pipe
Temperature Sensor Error
Liquid pipe temperature sensor of slave1 Outdoor Unit
is open or short
3
Slave2 Outdoor Unit Liquid pipe
Temperature Sensor Error
Liquid pipe temperature sensor of slave2 Outdoor Unit
is open or short
1
Master Outdoor Unit Subcooling
Outlet Temperature Sensor Error
Master Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
1 1 5 2
Slave1 Outdoor Unit Subcooling
Outlet Temperature Sensor Error
Slave1 Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
3
Slave2 Outdoor Unit Subcooling
Outlet Temperature Sensor Error
Slave2 Outdoor Unit Subcooling Outlet Temperature
Sensor open or short
1 Failure of operation mode conversion at Master Outdoor Unit
Pressure unbalance between Outdoor Units
1 5 1 2 Failure of operation mode conversion at Slave1 Outdoor Unit
Pressure unbalance between Outdoor Units
3 Failure of operation mode conversion at Slave2 Outdoor Unit
Pressure unbalance between Outdoor Units
Installation Manual 99
ENGLISH
Communication Error Between
1 Master Outdoor Unit and Other
Outdoor Unit
Test Run
Outdoor unit related error
Display
100
Title
Cause of Error
1
Master Outdoor Unit Constant Speed
Compressor Fault
Comp locking, Check Valve leakage, comp dielectric break
down at Master Outdoor Unit
1 7 3 2
Slave1 Outdoor Unit Constant Speed
Compressor Fault
Comp locking, Check Valve leakage, comp dielectric at
Slave1 Outdoor Unit
3
Slave2 Outdoor Unit Constant Speed
Compressor Fault
Comp locking, Check Valve leakage, comp dielectric at
Slave2 Outdoor Unit
1
Master outdoor unit rated speed 2 condenser over-current
Master Outdoor Unit rated speed 2 condenser burned /
locked or fault by over-current
1 7 4 2
Slave1 outdoor unit rated speed 2 condenser over-current
Slave1 Outdoor Unit rated speed 2 condenser burned /
locked or fault by over-current
3
Slave2 outdoor unit rated speed 2 condenser over-current
Slave2 Outdoor Unit rated speed 2 condenser burned /
locked or fault by over-current
1
Master outdoor unit Main Board MainSub Micom communication error
Master Outdoor Unit Main Board Main-Sub Micom communication failed
1 8 2 2
Slave1 outdoor unit Main Board MainSub Micom communication error
Slave1 Outdoor Unit Main Board Main-Sub Micom communication failed
3
Slave2 outdoor unit Main Board MainSub Micom communication error
Slave2 Outdoor Unit Main Board Main-Sub Micom communication failed
1
Excessive increase of Master Outdoor
Unit Fan PCB Heat Sink Temperature
Master Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
1 9 3 2
Excessive increase of Slave1 Outdoor
Unit Fan PCB Heat Sink Temperature
Slave1 Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
3
Excessive increase of Slave2 Outdoor
Unit Fan PCB Heat Sink Temperature
Slave2 Outdoor Unit Fan Inverter PCB Temperature is
Over 95°C
1
Master Outdoor Unit Fan PCB Heat Sink
Temperature Sensor Error
Master Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
1 9 4 2
Slave1 Outdoor Unit Fan PCB Heat Sink
Temperature Sensor Error
Slave1 Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
3
Slave2 Outdoor Unit Fan PCB Heat Sink
Temperature Sensor Error
Slave2 Outdoor Unit Fan PCB Heat Sink Temperature
Sensor open or short
Outdoor Unit
New Function
ENGLISH
New Function
n Multi V III provides as following new functions.
New Function
Cool/Heat selector (PRDSBM)
Cooling/ Heating/ Fan
Cooling/ Heating/ All OFF
Demand control
-. Low load operation
-. DDC control (DC0~10V Input)
ODU Dry contact (PQDSBDCVM0)
ODU Fan Low speed control
(Night low noise operation)
Applied item
ODU
Solution Accessory
ODU
Solution Accessory
Error alarm
h If you want to get more details, refer to each installation Manuals.
n Out Feature
• Cool/ Heat Selector
• ODU Dry contact
Installation Manual 101
New Function
1. Cool/ Heat selector
Cool/ Heat Selector has provided two different functions.
- Cooling/ heating/ Fan lock mode
- Cooling/ heating/ All OFF mode
[Installation]
1. Check the contents of Cool/ Heat Selector
<Outdoor Dry Contact Main Body>
<Front Case>
2. Connect Outdoor Main PCB and Cool/ Heat Selector.
-. Connect terminals on the back side of Cool/Heat Selector to terminal of Outdoor as show
Push Button
- Insert wire method -
¨≠GND
< Outdoor Main PCB >
3
1
4
2
Push arrow direction.
¨
≠
GND
3
1
4
2
shows field wiring
connected wiring
Insert wire to connector.
<Outdoor Dry Contact Back Side >
❈ Communication line length can be maximum 300m, use communication line as thick as 1.25mm2.
SW01B SW02B
[setting]
7-Segment
1. Set DIP S/W according to DIP S/W
setting table.(5,6,11,12)
2. Push Black button on SVC PCB
3. Select number as below at 7-segment
“0” : Cooling/ Heating / Fan lock mode
“1” : Cooling/ Heating/ All OFF Mode
4. After Selecting, DIP S/W OFF(11,12 )
102
Outdoor Unit
Setting Button
New Function
2. ODU Dry contact
ENGLISH
ODU Dry contact has provided Three different functions.
- Demand control
- Night Low Noise control
- Error Alarm Monitoring function
[ODU Dry contact]
- Feature and Parts Naming
1
2
3
4
5
15
14
13
12
6
7
8
11
10
9
1. SWDIP : Switch to select main function
2. SW_Address2 : Switch to set a upper
address of the outdoor unit
3. SW_Address1 : Switch to set a lower
address of the outdoor unit
4. SW_STEP : Switch to select a control mode.
5. CN_PWR : DC Input terminal
6. ERROR : Error display with relay contact
7. BUS-A : RS-485 (+) Terminal
8. BUS-B : RS-485 (-) Terminal
9. CN_CAPACITY : Signal input terminal to
control a capacity of outdoor unit
10. CN_SPEED/CAP : Signal input terminal for
Analog Input/Low noise operation
11. CN_OUT : Outdoor unit connector
12. LED1 : Display LED for RS-485 status
13. LED01G,02G,03G : Display LED for
communication status
14. CN_JIG : Connector for writing program
15. SW1 : Reset switch
- Installation
1. ODU Dry contact single installation : Connect with ODU both single Unit and Series.
RS-485
BUS_A
BUS_B
Installation Manual 103
New Function
2. ODU Dry contact with Central controller
: With Single Outdoor unit
Multi-V
WIRE ASSY 1(1EA)
CN_OUT
TTL
: With Series Outdoor units
Multi-V
WIRE ASSY 1(1EA)
Central
Control
Devices
CN_OUT
104
TTL
Outdoor Unit
BUS_A
BUS_B
New Function
2.1 Demand Control
ENGLISH
ODU Dry contact has provided Two different methods for Demand control
- Using Contact signal
: High/ Low pressure value s are changed by setting value of Rotary S/W
- Using Analog signal with DDC Module
: High/ Low pressure value s are changed by setting value of DDC Module.(DC 0~10V)
[Rotary S/W setting ]
SW_STEP
0, 1, 2, 3, 4, 5, 6
D, E
Input Signal
Contact signal
Analog signal
[Setting ]
SW_STEP
Using Contact signal
Using Analog signal with DDC Module
- Each connecting methods
1. Using Contact signal
<Without External power source>
SW_VOLT2
<With External power source>
SW_VOLT2
SW_VOLT1
SW_VOLT1
Notes
LG does not
supply this section
(Field supply)
Connect separate
External voltage of
DC12V
Input_3
Input_2
Input_1
comm
Input_LNO
comm
Input_3
Input_2
Input_1
comm
Input_LNO
comm
Do not input the voltage signal in
"NON VOLT" setting mode otherwise
it will cause serious damage
LG does not
supply this section
(Field supply)
Installation Manual 105
New Function
2. Using Analog signal with DDC Module
SW_VOLT2
SW_VOLT1
DC 0~10V
input
GND
Direct Digital Controller
[Control Value]
- Using Contact signal
D
0
1
2
3
4
5
6
7
8
9
10
Rotary
S/W
E
106
Volt
0
1
2
3
4
5
6
7
8
9
10
Step
0
1
2
3
4
5
6
7
8
9
10
Cooling
Control
Not-Control
100%
90%
80%
70%
60%
50%
45%
40%
Comp OFF
All OFF
Step
0
0
0
0
00
0
0
0
0
0
0
Heating
Control
Not-Control
100%
90%
80%
70%
60%
50%
45%
40%
Comp OFF
All OFF
Step
9
8
7
6
5
4
3
2
1
1
1
Cooling
Control
Comp OFF
40%
45%
52%
60%
70%
80%
90%
100%
100%
100%
Step
0
0
0
0
00
0
0
0
0
0
0
Heating
Control
Comp OFF
40%
45%
50%
60%
70%
80%
90%
100%
100%
100%
Outdoor Unit
100%
Performance output of the ODU
Volt
90%
80%
70%
60%
50%
45%
40%
Comp.
OFF
Non
Control
Signal
Input
Step
0V
0
1V
1
2V
2
3V
3
4V
4
5V
5
6V
6
7V
7
8V
8
9V
9
10V
10
2V
7
3V
6
4V
5
5V
4
6V
3
7V
2
8V
1
9V
1
10V
1
100%
Performance output of the ODU
Rotary
S/W
90%
80%
70%
60%
50%
45%
40%
Signal
Input
Step
Comp.
OFF
0V
9
1V
8
System
OFF
New Function
- Using Analog signal with DDC Module
1
2
3
4
5
6
Input_2
Input_3
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
Comp capacity
Of outdoor unit(%)
No control
70
40
COMP OFF
No control
70
50
COMP OFF
No control
80
50
COMP OFF
No control
70
40
ALL OFF
No control
70
50
ALL OFF
No control
80
50
ALL OFF
No control
50
COMP OFF
ALL OFF
100%
Performance output of the ODU
0
Input_1
ENGLISH
SW_
STEP
90%
80%
70%
60%
50%
45%
40%
Signal
Input
Step
Comp.
OFF
Non
Control
0V
0
1V
1
2V
2
3V
3
4V
4
5V
5
6V
6
7V
7
8V
8
9V
9
System
OFF
10V
10
Installation Manual 107
New Function
2.2 Night Low Noise control
ODU Dry contact has provided Two methods for Night Low Noise Control
- Automatically operating
: Using previous method
- Manual operating
: Using simple switch and timer
[Setting]
- For ODU Dry contact
ON
Position
L1 2 3 4
ON
L1 2 3 4
Notes
L1 2 3 4
OFF : Disable Low Noise
Operation
- For Outdoor unit
Refer to DIP S/W setting table
2.3 Error Alarm monitoring
ODU Dry contact has provided Error Alarm monitoring function
Notice for system fault information by buzzer or warning lamp.
Occurring fault is not only ODUs but also IDUs.
[Setting]
Field Supply
Power
AC or DC
(Depends on Operation
display power type)
108
Outdoor Unit
OFF : Slave Mode
ON : Enable Low Noise
Operation
Connect with S/W or Timer for
Night Low Noise Control
- Note
AC Power : 3A @250V
DC Power : 3A @30V
ON : Master Mode
ON
Default State is L1: ON, L2: ON
Error Display
Function
Caution For Refrigerant Leak
The installer and system specialist shall secure safety against leakage according to local regulations or standards.
The following standards may be applicable if local regulations are not available.
Introduction
Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to
such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
n Limiting concentration
Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken without hurting human body when refrigerant leaks in the air. The limiting concentration shall be described in the
unit of kg/m3 (Freon gas weight per unit air volume) for facilitating calculation.
Limiting concentration: 0.44kg/m3(R410A)
Outdoor unit
(No.1 system)
Flow of
refrigerant
Indoor unit
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
Checking procedure of limiting concentration
Check limiting concentration along following steps and take appropriate measure depending on the situation.
n Calculate amount of all the replenished refrigerant (kg) per each refrigerant
system.
Amount of replenished
refrigerant per one outdoor
unit system
+
Amount of replenished
refrigerant at factory shipment
Amount of additional
=
replenished refrigerant
Total amount of replenished
refrigerant in refrigerant
facility (kg)
Note : In case one refrigerant facility is
divided into 2 or more refrigerant
systems and each system is
independent, amount of replenished
refrigerant of each system shall be
adopted.
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter at customer
n Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the smaller room.
(1) Without partition
(2) With partition and with opening which serve as
passage of air to adjoining room
Outdoor unit
Outdoor unit
Indoor unit
Indoor unit
Opening
Partition
In the case of opening
without door , or 0.15
% or more openings
(to floor space) both
above and below door)
Installation Manual 109
ENGLISH
Caution For Refrigerant Leak
Caution For Refrigerant Leak
(3) With partition and without opening which serve as passage of air to adjoining room
Outdoor unit
Indoor unit
Smallest
room
n Calculate refrigerant concentration
Total amount of replenished
refrigerant in refrigerant facility (kg)
≤ Refrigerant concentration
Capacity of smallest room where
indoor unit is installed (m3)
(kg/m3)
(R410A)
In case the result of calculation exceeds
the limiting concentration, perform the
same calculations by shifting to the
second smallest, and the third smallest
rooms until at last the result is below the
limiting concentration.
n In case the concentration exceeds the limit
When the concentration exceeds the limit, change original plan or take one of the countermeasures
shown below:
• Countermeasure 1
Provide opening for ventilation.
Provide 0.15% or more opening to floor space both above and below door, or provide opening without
door.
• Countermeasure 2
Provide gas leak alarm linked with mechanical ventilator.
Reducing the outdoor refrigerant qty.
Gas leak alarm
Countermeasure 2
Mechanical ventilator
Indoor unit
Countermeasure 1 Opening effective to ventilation
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant is
heavier than air.
110
Outdoor Unit
Installation guide at the seaside
ENGLISH
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 kept more than 70 cm of space
between outdoor unit and the windbreak for easy
air flow.
3) Select a well-drained place.
1. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using
water.
Installation Manual 111
112
Outdoor Unit
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