Page 1
INSTALLATION MANUAL
ENGLISH
ITALIANO ESPAÑOL
FRANÇAIS
DEUTSCH
ČEŠTINA
ΕΛΛΗΝΙΚΆ
NEDERLANDS
POLSKI
LIMBA ROMÂNĂ
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.
Ɠ
This product contains Fluorinated Greenhouse Gases. (R410A)
Original instruction
[
Representative] LG Electronics Inc. EU Representative : LG Electronics European Shared Service Center B.V.
Krijgsman 1, 1186 DM Amstelveen, The Netherlands
[
Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu, Changwon-si,
Gyeongsangnam-do, KOREA
www.lg.com
P/NO : MFL68100309
Page 2
2
TIPS FOR SAVING ENERGY
Here are some tips that will help you minimize the power consumption
when you use the air conditioner. You can use your air conditioner
more efficiently by referring to the instructions below:
IMPORTANT SAFETY INSTRUCTIONS
READ ALL INSTRUCTIONS BEFORE USING THE
APPLIANCE.
Always comply with the following precautions
to avoid dangerous situations and ensure peak
performance of your product
WARNING
It can result in serious injury or death when the
directions are ignored
CAUTION
It can result in minor injury or product damage
when the directions are ignored
WARNING
• Installation or repairs made by unqualified
persons can result in hazards to you and others.
• 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.
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.
• 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 ground the product.
- There is risk of fire or electric shock.
• Always intstall a dedicated circuit and
breaker.
- Improper wiring or installation may cause
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, explo-
sion, or injury.
• Do not install, remove, or re-install the unit
by yourself (customer).
- There is risk of fire, electric shock, explo-
sion, or injury.
!
!
!
ENGLISH
• Do not cool excessively indoors. This may be harmful for your health
and may consume more electricity.
• Block sunlight with blinds or curtains while you are operating the air
conditioner.
• Keep doors or windows closed tightly while you are operating the air
conditioner.
• Adjust the direction of the air flow vertically or horizontally to circulate
indoor air.
• Open windows regularly for ventilation as the indoor air quality may
deteriorate if the air conditioner is used for many hours.
• Clean the air filter once every 2 weeks. Dust and impurities collected
in the air filter may block the air flow or weaken the cooling / dehumidifying functions.
For your records
Staple your receipt to this page in case you need it to prove the date of
purchase or for warranty purposes. Write the model number and the
serial number here:
Model number :
Serial number :
You can find them on a label on the side of each unit.
Dealer’s name :
Date of purchase :
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3
• Do not store or use flammable gas or combustibles near the air conditioner.
- There is risk of fire or failure of product.
• Use the correctly rated breaker or fuse.
- There is risk of fire or electric shock.
• Do not install the unit at the outdoors.
- Otherwise it may cause fire, electric shock
and trouble.
• Do not install the product on a defective installation stand.
- It may cause injury, accident, or damage to
the product.
• 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 ex-
plosion.
• 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.
- If a different refrigerant or air is mixed with
the original refrigerant, the refrigerant cycle
may malfunction and the unit may be damaged.
• 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.
• Ventilate before operating air conditioner
when gas leaked out.
- It may cause explosion, fire, and burn.
• Securely install the cover of control box and
the panel.
- If the cover and panel are not installed se-
curely, dust or water may enter the outside
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 appropri-
ate 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.
Operation
• Do not damage or use an unspecified power
cord.
- There is risk of fire, electric shock, explosion, or
injury.
• Use a dedicated outlet for this appliance.
- There is risk of fire or electrical shock.
• Be cautious that water could not enter the product.
- There is risk of fire, electric shock, or product
damage.
• Do not touch the power switch with wet hands.
- There is risk of fire, electric shock, explosion, or
injury.
• When the product is soaked (flooded or submerged), contact an Authorized Service Center.
- There is risk of fire or electric shock.
• 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 outside unit .
- This could result in personal injury and product
damage.
• Do not open the inlet grille of the product during
operation. (Do not touch the electrostatic filter, if
the unit is so equipped.)
- There is risk of physical injury, electric shock, or
product failure.
ENGLISH
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4
CAUTION
Installation
• Always check for gas (refrigerant) leakage after
installation or repair of product.
- Low refrigerant levels may cause failure of prod-
uct.
• Do not install the product where the noise or hot
air from the outside unit could damage the
neighborhoods.
- It may cause a problem for your neighbors.
• Keep level even when installing the product.
- To avoid vibration or water leakage.
• Do not install the unit where combustible gas
may leak.
- If the gas leaks and accumulates around the
unit, an explosion may result.
• Use power cables of sufficient current carrying
capacity and rating.
- Cables that are too small may leak, generate
heat, and cause a fire.
• 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, high-frequency 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.
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.
• Do not block the inlet or outlet.
- It may cause failure of appliance or accident.
• Make the connections securely so that the outside force of the cable may not be applied to the
terminals.
- Inadequate connection and fastening may gen-
erate heat and cause a fire.
• 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.
• Be very careful about product transportation.
- Only one person should not carry the product if
it weighs more than 20 kg.
-
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 outside unit , suspending
it at the specified positions on the unit base.
Also support the outside unit at four points so
that it cannot slip sideways.
• 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.
• 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 touch any of the refrigerant piping during
and after operation.
- It can cause a burn or frostbite.
!
ENGLISH
Page 5
5
• Do not operate the air conditioner with the panels
or guards removed.
- Rotating, hot, or high-voltage parts can cause in-
juries.
• 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.
•
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.
• Use a firm stool or ladder when cleaning or maintaining the air conditioner.
- Be careful and avoid personal injury.
ENGLISH
TABLE OF CONTENTS
2 TIPS FOR SAVING ENERGY
2 IMPORTANT SAFETY INSTRUCTIONS
6 INSTALLATION PROCESS
6 OUTSIDE UNITS INFORMATION
8 ALTERNATIVE REFRIGERANT R410A
8 SELECT THE BEST LOCATION
9 INSTALLATION SPACE
9 WATER CONTROL
10 LIFTING METHOD
10 INSTALLATION
13 REFRIGERANT PIPING INSTALLATION
14 INSTALLATION OF WATER PIPE
15 DEVICE PROTECTION UNIT
16 PIPE CONNECTIONS BETWEEN INDOOR
AND OUTSIDE UNIT
24 ELECTRICAL WIRING
32 TEST RUN
36 CAUTION FOR REFRIGERANT LEAK
37 COOLING TOWER APPLIED METHOD
37 WATER SOLENOID VALVE CONTROL
38 INSTALLATION GUIDE FOR HARMONICS
AND FLICKER
Page 6
6
INSTALLATION PROCESS
ENGLISH
The foundation must be level even
Outside unit foundation work
Avoid short circuits and ensure
sufficient space is allowed for service
Installation of outside unit
Refer to automatic addressing flowchart
Automatic addressing of indoor unit
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
2
) there
must be no drop in pressure.
Airtight test
Multiple core cable must not be used.
(suitable cable should be selected)
Electrical work
(connection circuits and drive circuits)
Make sure no gaps are left where
the insulating materials are joined
Heat insulation work
Make sure airflow is sufficient
Duct work
Adjust to downward gradient
Drain pipe work
Special attention to dryness,
cleanness and tightness
Refrigerant piping work
Check model name to
make sure the fitting
is made correctly
Installation of indoor unit
Take account of gradient
of drain piping
Sleeve and insert work
Make connection clearly between outside, indoor,
remote controller and option.
Preparation of contract drawings
Indicate clearly who will be responsible for switch setting.
Determination of division work
The vacuum pump used must have a capacity of reaching at least
5 torr, more than 1 hour
Vacuum drying
Recharge correctly as calculated in this manual. and record the
amount of added refrigerant
Additional charge of refrigerant
Make sure there are no gaps left between the facing materials
used on the ceiling
Fit facing panels
Run each indoor unit in turn to make sure the pipe work
has been fitted correctly
Test run adjustment
Explain the use of the system as clearly as possible to your customer and
make sure all relevant documentation is in order
Transfer to customer with explanation
Preheat the crank case with the electrical heater for more than 6 hours.
CAUTION
• 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 thickness of the piping should comply with the relevant
local and national regulations for the designed pressure 3.8MPa.
• 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.)
!
CAUTION
Notes: *
We can guarantee the operation only within 130% Combination. If you want to connect more than 130% combination,
please contact us and discuss the requirement like below.
• If the operation of indoor unit is more than 130%, low airflow
operation is recommended in all the indoor units.
• If the operation of indoor unit is more than 130%, additional re-
frigerant is needed according to the Aheadquarter guidance.
• Over 130%, capacity is same as capacity of 130%, Same re-
mark is valid for power input.
•
Ratio of the running Indoor Units to the Outside: Within 10 ~ 100%
•
A combination operation over 100% cause to reduce each indoor unit capacity.
Combination Ratio(50~200%)
Outside Unit Number Connection Ratio
Single outside units 200%
Double outside units 160%
More than Triple outside units
130%
!
OUTSIDE UNITS INFORMATION
Power Supply : 3Ø, 380V, 60Hz or 3Ø, 380 - 415V, 50Hz
Model Name : ARWN***LAS4
Unit
1 Unit
System Capacity (HP)
8 10 12
Model
Combination Unit
ARWN080LAS4 ARWN100LAS4 ARWN120LAS4
Independent Unit
ARWN080LAS4 ARWN100LAS4 ARWN120LAS4
Refrigerant Precharged Amountkg5.8 5.8 5.8
Maximum Connectable Number of Indoor Units
13 16 20
Net Weight
kg
127 x 1 127 x 1 127 x 1
lbs
280 x 1 280 x 1 280 x 1
Dimensions(WxHxD)
mm
755 × 997 × 500 755 × 997 × 500 755 × 997 × 500
inch
(29-23/32 x 39-1/4 x 19-11/16) x 1
(29-23/32 x 39-1/4 x 19-11/16) x 1 (29-23/32 x 39-1/4 x 19-11/16) x 1
Refrigerant
Connecting Pipes
Liquid
mm(inch)
9.52(3/8) 9.52(3/8) 12.7(1/2)
Gas
mm(inch)
22.2(7/8) 22.2(7/8) 25.4(1)
Water Connecting Pipes
Inlet
mm
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
Outlet
mm
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
Drain Outlet
mm
PT20(External thread) PT20(External thread) PT20(External thread)
Temp. range of
Circulation water
Cooling
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
Heating
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Unit
2 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
Unit
1 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
18 20
ARWN180LAS4 ARWN200LAS4
ARWN180LAS4 ARWN200LAS4
33
29 32
140 x 1 140 x 1
309 x 1 309 x 1
755 × 997 × 500 755 × 997 × 500
(29-23/32 x 39-1/4 x 19-11/16) x 1 (29-23/32 x 39-1/4 x 19-11/16) x 1
12.7(1/2) 12.7(1/2)
28.58(1-1/8) 28.58(1-1/8)
PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Unit
1 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
14 16
ARWN140LAS4 ARWN160LAS4
ARWN140LAS4 ARWN160LAS4
5.8 3
23 26
127 x 1 140 x 1
280 x 1 309 x 1
755 × 997 × 500 755 × 997 × 500
(29-23/32 x 39-1/4 x 19-11/16) x 1 (29-23/32 x 39-1/4 x 19-11/16) x 1
12.7(1/2) 12.7(1/2)
25.4(1) 28.58(1-1/8)
PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
22 24 26
ARWN220LAS4 ARWN240LAS4 ARWN260LAS4
ARWN120LAS4 ARWN120LAS4 ARWN140LAS4
ARWN100LAS4 ARWN120LAS4 ARWN120LAS4
5.8 + 5.8 5.8 + 5.8 5.8 + 5.8
35 39 42
127 x 2 127 x 2 127 x 2
280 x 2 280 x 2 280 x 2
(755 × 997 × 500) x 2 (755 × 997 × 500) x 2 (755 × 997 × 500) x 2
(29-23/32 x 39-1/4 x 19-11/16) x 2 (29-23/32 x 39-1/4 x 19-11/16) x 2 (29-23/32 x 39-1/4 x 19-11/16) x 2
19.05(3/4) 19.05(3/4) 19.05(3/4)
34.9(1-3/8) 34.9(1-3/8) 34.9(1-3/8)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Page 7
7
ENGLISH
Unit
2 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
34 36
ARWN340LAS4 ARWN360LAS4
ARWN200LAS4 ARWN180LAS4
ARWN140LAS4 ARWN180LAS4
3.0 + 5.8 3.0 + 3.0
55 58
(140 x 1) + (127 x 1) 140 x 2
(309 x 1) + (280 x 1) 309 x 2
(755 × 997 × 500) x 2 (755 × 997 × 500) x 2
(29-23/32 x 39-1/4 x 19-11/16) x 2 (29-23/32 x 39-1/4 x 19-11/16) x 2
19.05(3/4) 19.05(3/4)
34.9(1-3/8) 41.3(1-5/8)
PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Unit
2 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
38 40
ARWN380LAS4 ARWN400LAS4
ARWN200LAS4 ARWN200LAS4
ARWN180LAS4 ARWN200LAS4
3.0 + 3.0 3.0 + 3.0
61 64
140 x 2 140 x 2
309 x 2 309 x 2
(755 × 997 × 500) x 2 (755 × 997 × 500) x 2
(29-23/32 x 39-1/4 x 19-11/16) x 2 (29-23/32 x 39-1/4 x 19-11/16) x 2
19.05(3/4) 19.05(3/4)
41.3(1-5/8) 41.3(1-5/8)
PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Unit
3 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
54 56
ARWN540LAS4 ARWN560LAS4
ARWN200LAS4 ARWN200LAS4
ARWN200LAS4 ARWN180LAS4
ARWN140LAS4 ARWN180LAS4
3.0 + 3.0 + 5.8 3.0 + 3.0 + 3.0
64 64
(140 x 2) + (127 x 1) 140 x 3
(309 x 2) + (280 x 1) 309 x 3
(755 × 997 × 500) x 3 (755 × 997 × 500) x 3
(29-23/32 x 39-1/4 x 19-11/16) x 3 (29-23/32 x 39-1/4 x 19-11/16) x 3
19.05(3/4) 19.05(3/4)
41.3(1-5/8) 41.3(1-5/8)
PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Unit
3 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
5860
ARWN580LAS4 ARWN600LAS4
ARWN200LAS4 ARWN200LAS4
ARWN200LAS4 ARWN200LAS4
ARWN180LAS4 ARWN200LAS4
3.0 + 3.0 + 3.0 3.0 + 3.0 + 3.0
64 64
140 x 3 140 x 3
309 x 3 309 x 3
(755 × 997 × 500) x 3 (755 × 997 × 500) x 3
(29-23/32 x 39-1/4 x 19-11/16) x 3 (29-23/32 x 39-1/4 x 19-11/16) x 3
19.05(3/4) 19.05(3/4)
41.3(1-5/8) 41.3(1-5/8)
PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Unit
3 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
42 44 46
ARWN420LAS4 ARWN440LAS4 ARWN460LAS4
ARWN200LAS4 ARWN200LAS4 ARWN200LAS4
ARWN120LAS4 ARWN120LAS4 ARWN140LAS4
ARWN100LAS4 ARWN120LAS4 ARWN120LAS4
3.0 + 5.8 + 5.8 3.0 + 5.8 + 5.8 3.0 + 5.8 + 5.8
64 64 64
(140 x 1) + (127 x 2) (140 x 1) + (127 x 2) (140 x 1) + (127 x 2)
(309 x 1) + (280 x 2) (309 x 1) + (280 x 2) (309 x 1) + (280 x 2)
(755 × 997 × 500) x 3 (755 × 997 × 500) x 3 (755 × 997 × 500) x 3
(29-23/32 x 39-1/4 x 19-11/16) x 3 (29-23/32 x 39-1/4 x 19-11/16) x 3 (29-23/32 x 39-1/4 x 19-11/16) x 3
19.05(3/4) 19.05(3/4) 19.05(3/4)
41.3(1-5/8) 41.3(1-5/8) 41.3(1-5/8)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Unit
3 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
48 50 52
ARWN480LAS4 ARWN500LAS4 ARWN520LAS4
ARWN200LAS4 ARWN200LAS4 ARWN200LAS4
ARWN140LAS4 ARWN160LAS4 ARWN180LAS4
ARWN140LAS4 ARWN140LAS4 ARWN140LAS4
3.0 + 5.8 + 5.8 3.0 + 3.0 + 5.8 3.0 + 3.0 + 5.8
64 64 64
(140 x 1) + (127 x 2) (140 x 2) + (127 x 1) (140 x 2) + (127 x 1)
(309 x 1) + (280 x 2) (309 x 2) + (280 x 1) (309 x 2) + (280 x 1)
(755 × 997 × 500) x 3 (755 × 997 × 500) x 3 (755 × 997 × 500) x 3
(29-23/32 x 39-1/4 x 19-11/16) x 3 (29-23/32 x 39-1/4 x 19-11/16) x 3 (29-23/32 x 39-1/4 x 19-11/16) x 3
19.05(3/4) 19.05(3/4) 19.05(3/4)
41.3(1-5/8) 41.3(1-5/8) 41.3(1-5/8)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Unit
4 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
62 64 66
ARWN620LAS4 ARWN640LAS4 ARWN660LAS4
ARWN200LAS4 ARWN200LAS4 ARWN200LAS4
ARWN200LAS4 ARWN200LAS4 ARWN200LAS4
ARWN120LAS4 ARWN120LAS4 ARWN140LAS4
ARWN100LAS4 ARWN120LAS4 ARWN120LAS4
3.0 + 3.0 + 5.8 + 5.8 3.0 + 3.0 + 5.8 + 5.8 3.0 + 3.0 + 5.8 + 5.8
64 64 64
(140 x 2) + (127 x 2) (140 x 2) + (127 x 2) (140 x 2) + (127 x 2)
(309 x 2) + (280 x 2) (309 x 2) + (280 x 2) (309 x 2) + (280 x 2)
(755 × 997 × 500) x 4 (755 × 997 × 500) x 4 (755 × 997 × 500) x 4
(29-23/32 x 39-1/4 x 19-11/16) x 4 (29-23/32 x 39-1/4 x 19-11/16) x 4 (29-23/32 x 39-1/4 x 19-11/16) x 4
22.2(7/8) 22.2(7/8) 22.2(7/8)
44.5(1-3/4) 44.5(1-3/4) 53.98(2-1/8)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 114°F) 10°C ~ 45°C(50°F ~ 115°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 114°F) -5°C ~ 45°C(23°F ~ 115°F)
Unit
2 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
2830 32
ARWN280LAS4 ARWN300LAS4 ARWN320LAS4
ARWN140LAS4 ARWN160LAS4 ARWN180LAS4
ARWN140LAS4 ARWN140LAS4 ARWN140LAS4
5.8 + 5.8 3.0 + 5.8 3.0 + 5.8
45 49 52
127 x 2 (140 x 1) + (127 x 1) (140 x 1) + (127 x 1)
280 x 2 (309 x 1) + (280 x 1) (309 x 1) + (280 x 1)
(755 × 997 × 500) x 2 (755 × 997 × 500) x 2 (755 × 997 × 500) x 2
(29-23/32 x 39-1/4 x 19-11/16) x 2 (29-23/32 x 39-1/4 x 19-11/16) x 2 (29-23/32 x 39-1/4 x 19-11/16) x 2
19.05(3/4) 19.05(3/4) 19.05(3/4)
34.9(1-3/8) 34.9(1-3/8) 34.9(1-3/8)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F) 10°C ~ 45°C(50°F ~ 113°F)
-5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F) -5°C ~ 45°C(23°F ~ 113°F)
Page 8
8
ENGLISH
SELECT THE BEST LOCATION
Select space for installing outside unit , which will meet the following
conditions:
- With strength which bears weight of unit
- With space for air passage and service work
Don't install the unit at the space where generation, inflow, stagnation, and leak of combustible gas is expected.
- Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.
- Location with no leakage of combustible gas
- Recommend the outside unit to be installed within 0~40°C.
- Location with installation or service work space (Refer to required
space)
- Do not use the outside unit under any special environment where oil,
steam and sulfuric gas exist.
- Install in a separate machine room not exposed to external air
Establish an anti-freeze plan for the water supply when the product is
stopped during the winter.
Install the product so that the noise from the machine room is not
transferred outsides
- The floor of the machine room must be water proof.
- Drainage must be installed in the machine room to process the water
drainage.
- Install a floor slope to make the drainage smooth.
- Avoid installing the outside unit in the location with following conditions.
- Location where corrosive gas such as acidic gas is generated.
(It may cause the refrigerant leakage by corrosion of the pipe.)
- Location where electromagnetic waves happen.
(It may cause the abnormal operation by control parts disorder.)
- Location to be able to leak the combustible gas
- Location with carbon fiber or combustible dust.
- Location with the combustible material like thinner or gasoline.
(It may cause a fire by leaking the gas near the product.)
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.
CAUTION
• The wall thickness of the piping should comply with the relevant
local and national regulations for the designed pressure 3.8MPa
• 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.
!
CAUTION
• Do not install Multi V water outdoors. Always install indoor like
machine room.
• Inverter product may generate electric noise. Keep the body
from computer, stereo etc. at enough distance. Specially leave
space from indoor remote controller to shoes electric devices at
the above 3m in weak electric wave area. Insert the power
cable and other wire into separate conduit.
!
Unit
4 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
74 76
ARWN740LAS4 ARWN760LAS4
ARWN200LAS4 ARWN200LAS4
ARWN200LAS4 ARWN200LAS4
ARWN200LAS4 ARWN180LAS4
ARWN140LAS4 ARWN180LAS4
3.0 + 3.0 + 3.0 + 5.8 3.0 + 3.0 + 3.0 + 3.0
64 64
(140 x 3) + (127 x 1) 140 x 4
(309 x 3) + (280 x 1) 309 x 4
(755 × 997 × 500) x 4 (755 × 997 × 500) x 4
(29-23/32 x 39-1/4 x 19-11/16) x 4 (29-23/32 x 39-1/4 x 19-11/16) x 4
22.2(7/8) 22.2(7/8)
53.98(2-1/8) 53.98(2-1/8)
PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 119°F) 10°C ~ 45°C(50°F ~ 120°F)
-5°C ~ 45°C(23°F ~ 119°F) -5°C ~ 45°C(23°F ~ 120°F)
Unit
4 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
78 80
ARWN780LAS4 ARWN800LAS4
ARWN200LAS4 ARWN200LAS4
ARWN200LAS4 ARWN200LAS4
ARWN200LAS4 ARWN200LAS4
ARWN180LAS4 ARWN200LAS4
3.0 + 3.0 + 3.0 + 3.0 3.0 + 3.0 + 3.0 + 3.0
64 64
140 x 4 140 x 4
309 x 4 309 x 4
(755 × 997 × 500) x 4 (755 × 997 × 500) x 4
(29-23/32 x 39-1/4 x 19-11/16) x 4 (29-23/32 x 39-1/4 x 19-11/16) x 4
22.2(7/8) 22.2(7/8)
53.98(2-1/8) 53.98(2-1/8)
PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 121°F) 10°C ~ 45°C(50°F ~ 122°F)
-5°C ~ 45°C(23°F ~ 121°F) -5°C ~ 45°C(23°F ~ 122°F)
Unit
4 Unit
System Capacity (HP)
Model
Combination Unit
Independent Unit
Refrigerant Precharged Amount
kg
Maximum Connectable Number of Indoor Units
Net Weight
kg
lbs
Dimensions(WxHxD)
mm
inch
Refrigerant
Connecting Pipes
Liquid
mm(inch)
Gas
mm(inch)
Water Connecting Pipes
Inlet
mm
Outlet
mm
Drain Outlet
mm
Temp. range of
Circulation water
Cooling
Heating
68 70 72
ARWN680LAS4 ARWN700LAS4 ARWN720LAS4
ARWN200LAS4 ARWN200LAS4 ARWN200LAS4
ARWN200LAS4 ARWN200LAS4 ARWN200LAS4
ARWN140LAS4 ARWN160LAS4 ARWN180LAS4
ARWN140LAS4 ARWN140LAS4 ARWN140LAS4
3.0 + 3.0 + 5.8 + 5.8 3.0 + 3.0 + 3.0 + 5.8 3.0 + 3.0 + 3.0 + 5.8
64 64 64
(140 x 2) + (127 x 2) (140 x 3) + (127 x 1) (140 x 3) + (127 x 1)
(309 x 2) + (280 x 2) (309 x 3) + (280 x 1) (309 x 3) + (280 x 1)
(755 × 997 × 500) x 4 (755 × 997 × 500) x 4 (755 × 997 × 500) x 4
(29-23/32 x 39-1/4 x 19-11/16) x 4 (29-23/32 x 39-1/4 x 19-11/16) x 4 (29-23/32 x 39-1/4 x 19-11/16) x 4
22.2(7/8) 22.2(7/8) 22.2(7/8)
53.98(2-1/8) 53.98(2-1/8) 53.98(2-1/8)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT40(Internal thread) PT40(Internal thread) PT40(Internal thread)
PT20(External thread) PT20(External thread) PT20(External thread)
10°C ~ 45°C(50°F ~ 116°F) 10°C ~ 45°C(50°F ~ 117°F) 10°C ~ 45°C(50°F ~ 118°F)
-5°C ~ 45°C(23°F ~ 116°F) -5°C ~ 45°C(23°F ~ 117°F) -5°C ~ 45°C(23°F ~ 118°F)
Page 9
9
ENGLISH
INSTALLATION SPACE
Individual Installation Water control
Collective / Continuous Installation
During the installation of the unit, consider service, inlet, and outlet
acquire the minimum space as shown in the figures below.
: Service area
* In case of the water pipe passing side product, please make suffi-
cient service place to avoid occurring between water pipe and product side.
Space required for collective installation and continuous installation as
shown below considering passage for air and people.
: Service area
Two Layer Installation
Space required for two layer installation as shown below considering
passage for air and people.
: Service area
- Keep the water temperature between 10~45°C. Other it may cause
the breakdown.
Standard water supply temperature is 30°C for Cooling and 20°C for
heating.
- Properly control the water velocity. Otherwise it may cause the noise,
pipe vibration or pipe contraction, expansion according to the temperature. Use the same water pipe size connected with the product or
more.
- Refer to the water source pipe diameter and water velocity table
below. As the water velocity is fast, air bubble will increase.
- Be careful of the water purity control. Otherwise it may cause the
breakdown due to water pipe corrosion.
(Refer to 'Standard Table for Water Purity Control')
- In case the water temperature is above 40°C, it is good to prevent the
corrosion by adding the anticorrosive agent.
- Install the pipe, valve and gauge sensor in the space where it is easy
to maintain. Install the water valve in the low position for drain, if required.
- Be careful not to let air in. If so, the water velocity will be unstable in
the circulation, pump efficiency will also decrease and may cause the
piping vibration. Therefore, install the air purge where it may generate
the air.
- Choose the following anti freezing methods. Otherwise, it will be dangerous for the pipe to break in the winter.
Circulate the water with the pump before dropping the temperature.
Keep the normal temperature by boiler.
When the cooling tower is not operated for a long time, drain the
water in the cooling tower.
Use an anti-freeze. (For using an anti freeze, change the DIP switch
on main PCB in outside unit.)
Refer to the additive amount about freezing temperature as in the
table given below.
- In addition to anti freeze, it may cause the change of the pressure in
the water system and the low performance of the product.
- Make sure to use the closed cooling type tower.
When applying the open type cooling tower, use a 2nd heat exchanger to make the water supply system a closed type system.
WATER CONTROL
Service area
(Front)
Diameter (mm) Velocity range (m/s)
< 50 0.6 ~ 1.2
50 ~ 100 1.2 ~ 2.1
100 < 2.1 ~ 2.7
Anti freeze type
Minimum temperature for anti freezing (°C)
0 -5 -10 -15 -20 -25
Ethylene glycol (%) 0 12 20 30 - -
Propylene glycol (%) 0 17 25 33 - -
Methanol (%) 0 6 12 16 24 30
Standard table for water purity control
The water may contain many foreign substances and hence may influence the performance and lifetime of the product due to the corrosion
of the condenser and water pipe. (Use water source that complies
with the below standard table for water purity control.)
If you use water supply other than the tap water to supply the water
for the cooling tower, you must do a water quality inspection.
- If you use the closed cooling tower, the water quality must be controlled in accordance with the following standard table.
If you do not control the water quality in accordance with the following standard water quality table, it can cause performance deterioration to the air conditioner and severe problem to the product
(unit : mm)
H-Beam Support
<Front View><Top View>
100 100997
Water pipe
installation
space
20
Product
(Outside unit)
Service area
Service area
(Front)
(Front)
350
755
20
600 500
100
(Unit : mm)
20
(Outside unit)
350
20
Product
Service area
(Front)
755
100
Product
(Outside unit)
Service area
(Front)
350
755
(Outside unit)
Service area
350
100
<Top view>
Product
(Front)
755
100
Product
(Outside unit)
Service area
(Front)
350
755
600 500
100
(unit : mm)
H-Beam Support
<Front View>
997
100
100
997
100
Page 10
10
ENGLISH
CAUTION
Be very careful while carrying the product.
•
Do not have only one person carry product if it is more than 20kg.
• PP bands are used to pack some products.
Do not use them as a means for transportation because they are
dangerous.
• Tear the plastic packaging bag and scrap it so that children cannot play with it.
Otherwise plastic packaging bag may suffocate children.
• When carrying in outside unit, be sure to support it at four points.
Carrying in and lifting with 3-point support may make outside unit
unstable, resulting in a fall of it.
• Use 2 belts of at least 8 m 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.
!
Items
pH(25°C)
Conductivity[25°C](mS/m)
Chlorine ion(mg CI-/l)
Sulfuric acid ion(mg SO
2
-
/l)
Acid demand[pH 4.8] (mg SiO
2/l)
Total hardness(mg SiO
2/l)
Ca hardness(mg CaCO
3/l)
Ion silica(mg SiO
2/l)
Fe(mg Fe/l)
Copper(mg Cu/l)
Sulfuric acid ion(mg S
2
/l)
Ammonium ion(mg NH
4/l)
Residual chlorine(mg Cl/l)
Free carbon dioxide(mg CO
2/l)
Stability index
7.0~8.0
Below 30
Below 50
Below 50
Below 50
Below 70
Below 50
Below 30
Below 1.0
Below 1.0
Must not be detected
Below 0.3
Below 0.25
Below 0.4
-
Below 0.3
Below 0.1
Must not be detected
Below 0.1
Below 0.3
Below 4.0
-
7.0~8.0
Below 30
Below 50
Below 50
Below 50
Below 70
Below 50
Below 30
O
O
O
O
-
-
-
-
O
O
O
O
O
O
O
O
-
-
-
-
-
O
O
O
O
O
O
O
O
Closed type
Basic Item
Reference Item
Effect
Circulating water Supplemented water Corrosion Scale
4
+
Reference
• The "O" mark for corrosion and scale means that there is possibility of occurrence.
• When the water temperature is 40°C or above or when uncoated iron is exposed to the water, it can result in corrosion.
Therefore adding anti-corrosion agent or removing the air can be
very effective.
• In case of using the closed type cooling tower, the cooling water
and supplementing water must satisfy the water quality criteria
of closed type system in the table.
• Supplementing water and supplied water must be supplied with
tap water, industrial water and underground water excluding filtered water, neutral water, soft water etc.
• 15 items in the table are general causes of corrosion and scale.
LIFTING METHOD
- When carrying the unit suspended, 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 fours points so that impact
is not applied to the unit.
- Attach the ropes to the unit at an angle of 40° or less
The location of the Anchor bolts
- Install at places where it can endure the weight and vibration/noise of
the outside unit .
- The outside unit supports at the bottom shall have width of at least
100mm under the Unit’s legs before being fixed.
- The outside unit supports should have minimum height of 200mm.
- Anchor bolts must be inserted at least 75mm.
The location of
anchor bolt
62
62
631
755
(Unit : mm)
500
472
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).
At least
200mm
At least 100mm
At least 100mm
At least 100mm
At least 100mm
Sub line
A
40° or less
Rope supporter
B
Page 11
11
ENGLISH
Ⓐ 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 outside 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
CAUTION
• Be sure to remove the Pallet(Wood Support) of the bottom
side of the outside 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 Pallet(Wood Support) of the bottom
side of the outside unit before welding. Not removing Pallet(Wood Support) causes hazard of fire during welding.
WARNING
• Install where it can sufficiently support the weight of the out-
side unit .
If the support strength is not enough, the outside unit may
drop and hurt people.
• Install where the outside unit may not fall in strong wind or
earthquake.
If there is a fault in the supporting conditions, the outside unit
may fall and hurt people.
• Please take extra cautions on the supporting strength of the
ground, water outlet treatment(treatment of the water flowing
out of the outside unit in operation), and the passages of the
pipe and wiring, when making the ground support.
• Do not use tube or pipe for water outlet in the Base pan. Use
drainage instead for water outlet. The tube or pipe may freeze
and the water may not be drained.
Pallet(Wood Support)
- Remove before Installation
!
!
Main cause of gas leakage is defect in flaring work. Carry out correct
flaring work in the following procedure.
Cut the pipes and the cable
- Use the accessory piping kit or the pipes purchased locally.
- Measure the distance between the indoor and the outside unit .
- Cut the pipes a little longer than measured distance.
- Cut the cable 1.5m longer than the pipe length.
Pipe
Reamer
Point down
Copper
tube
90°
Slanted Uneven Rough
Preparation of Piping
Burrs removal
- Completely remove all burrs from the cut cross section of pipe/tube.
- Put the end of the copper tube/pipe to downward direction as you remove burrs in order to avoid to let burrs drop in the tubing.
Flaring work
- Carry out flaring work using flaring tool as shown below.
Firmly hold copper tube in a bar(or die) as indicated dimension in the
table above.
Check
- Compare the flared work with figure below.
- If flare is noted to be defective, cut off the flared section and do flaring work again.
Indoor unit
[kW(Btu/h]
Pipe " A "
Gas Liquid Gas Liquid
<5.6(19,100) 1/2" 1/4" 0.5~0.8 0~0.5
<16.0(54,600) 5/8" 3/8" 0.8~1.0 0.5~0.8
<22.4(76,400) 3/4" 3/8" 1.0~1.3 0.5~0.8
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
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
Tightening
torque(N·m)
A(mm) Flare shape
Ø9.52 38±4 12.8-13.2
Ø12.7 55±6 16.2-16.6
Ø15.88 75±7 19.3-19.7
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
!
Unit : mm
200
75
75
200
100
±2
90°
45°
±
2
A
R=0.4~0.8
Page 12
12
ENGLISH
Opening shutoff valve
1 Remove the cap and turn the valve counter clockwise with the
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.
Heat insulation
1 Use the heat insulation material for the refrigerant piping which has
an excellent heat-resistance (over 120°C).
2 Precautions in high humidity circumstance:
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 temperature: more than 23°C), water drops are liable to
fall. In this case, add heat insulation material according to the following procedure:
- Heat insulation material to be prepared... EPDM (Ethylene Propylene Diene Methylene)-over 120°C the heat-resistance temperature.
- Add the insulation over 10mm thickness at high humidity environ-
ment.
Closing shutoff valve
1 Remove the cap and turn the valve clockwise with the 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 N·m(Turn clockwise to close)
Shaft
(valve body)
Cap
(Valve lid)
Service
port
Flare
nut
Gas line piping
attached to unit
Closed Opened
Hexagonal
wrench
Ø6.35
6.0±0.6
5.0±0.0
4mm
17.6±2.0
12.7±2
16±2
-
Ø9.52 38±4
Ø12.7 10.0±1.0 20.0±2.0 55±6
Ø15.88 12.0±1.2
5mm
25.0±2.5
75±7
Ø19.05 14.0±1.4 110±10
Ø22.2
30.0±3.0 8mm -
Ø25.4 25±3
3 Standard refrigerant pipe EPDM heat insulation material thickness.
Classification
Air conditioned location
Non-air conditioned location
Note1)
General location
Note2)
Special location
Note3)
General location
Note4)
Negative condition
Liquid
pipe
Ø6.35
Above t9 Above t9 Above t9 Above t9
Ø9.52
Above Ø12.7 Above t13 Above t13 Above t13 Above t13
Gas
pipe
Ø9.52
Above t13
Above t19 Above t19
Above t25
Ø12.7
Ø15.88
Ø19.05
Ø22.22
Ø25.4
Ø28.58
Above t19
Ø31.75
Above t25 Above t25
Ø34.9
Ø38.1
Ø44.45
Note 1) General location: When the pipe passes through indoors in
which the indoor unit is operated
- Apartment, classroom, office, mall, hospital, office-tel etc.
Note 2) Special location
1 When the location is air conditioned but has severe temper-
ature/humidity difference due to high ceiling
- Church, auditorium, theater, lobby etc.
2 When the location is air conditioned but the internal temper-
ature/humidity of the ceiling finishing is high
- Bathroom/swimming pool locker room etc.
(Building with roof ceiling of sandwich assembly type)
Note 3) General location: When the pipe passes indoors where the in-
door unit is not operated
- Hall way etc. (Dormitory, school, office-tel)
Note 4) Negative condition: When below conditions 1 and 2 are met.
1 When the pipe passes indoors where the indoor unit is not
operated
2 When the humidity is high, regionally, and there is no air
flow in the pipe passing area
- When installing the outside unit within the outside pipe
tray or at a location where it is ok to have freezes, apply
13t.
- If you are not sure with the selection of heat insulation material, coordinate with the supervision or HQ.
- The thickness of the above heat insulation material is
based on the heat conductivity of 0.088W/m°C.
Plumbing materials and storage methods
Pipe must be able to obtain the specified thickness and should be
used with low impurities.
Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound.
Should not be mixed with contaminations such as dust, moisture.
Indoor unit
Fastening band
(accessory)
Refrigerant piping
Thermal insulator
(accessory)
Page 13
13
ENGLISH
Refrigerant piping on three principles
Drying Cleanliness Airtight
Should be no moisture
inside
No dust inside.
There is no refrigerant
leakage
Items
Moisture
Dust
Leakage
Cause
failure
- Significant hydrolysis of refrigerant oil
- Degradation of refrigerant oil
- Poor insula’tion of
the compressor
- Do not cold and
warm
- Clogging of EEV,
Capillary
- Degradation of refrigerant oil
- Poor insulation of
the compressor
- Do not cold and
warm
- Clogging of EEV,
Capillary
- Gas shortages
- Degradation of refrigerant oil
- Poor insulation of
the compressor
- Do not cold and
warm
Coun-
termea-
sure
-
No moisture in the pipe
- Until the connection is completed,
the plumbing pipe
entrance should be
strictly controlled.
- Stop plumbing at
rainy day.
- Pipe entrance
should be taken
side or bottom.
-
When removal burr
after cutting pipe, pipe
entrance should be
taken down.
- Pipe entrance
should be fitted cap
when pass through
the walls.
- No dust in the pipe.
- Until the connection is completed,
the plumbing pipe
entrance should be
strictly controlled.
- Pipe entrance
should be taken
side or bottom.
- When removal burr
after cutting pipe,
pipe entrance
should be taken
down.
- Pipe entrance
should be fitted cap
when pass through
the walls.
- Airtightness test
should be.
- Brazing operations
to comply with
standards.
- Flare to comply
with standards.
- Flange connections
to comply with
standards.
Nitrogen substitution method
Welding, as when heating without nitrogen substitution a large
amount of the oxide film is formed on the internal piping.
The oxide film is a caused by clogging EEV, Capillary, oil hole of accumulator and suction hole of oil pump in compressor.
It prevents normal operation of the compressor.
In order to avoid this problem, Welding should be done after replacing
air by nitrogen gas.
When welding plumbing pipe, the work is required.
Regulator
Nitrogen gas
Pressure 0.02MPa less
Auxiliary valve
Taping
(Should not
contain air)
Welding Point
Note) should not block the outlet side.
When the internal pressure in pipe is abo
ve the atmospheric pressure, pinhole is o
ccurred and it is a leakage cause.
Oxide scale
Nitrogen
•
Always use the nitrogen.(not use oxygen, carbon dioxide, and a
Chevron gas): Please use the following nitrogen pressure
0.02MPa Oxygen – Promotes oxidative degradation of refrigerant
oil. Because it is flammable, it is strictly prohibited to use Carbon
dioxide – Degrade the drying characteristics of gas Chevron Gas –
Toxic gas occurs when exposed to direct flame.
• Always use a pressure reducing valve.
• Please do not use commercially available antioxidant.
The residual material seems to be the oxide scale is observed.
In fact, due to the organic acids generated by oxidation of the
alcohol contained in the anti-oxidants, ants nest corrosion occurs. (causes of organic acid
’
alcohol + copper + water +
temperature)
CAUTION
!
Cautions in pipe connection/valve operation
WARNING
After completing work, securely tighten both service ports and
caps so that gas does not leak.
!
WARNING
Always use extreme care to prevent the refrigerant gas (R410A)
from leakage while using fire or flame. If the refrigerant gas
comes in contact with the flame from any source, such as a gas
stove, it breaks down and generates a poisonous gas which can
cause gas poisoning. Never perform brazing in an unventilated
room. Always conduct an inspection for gas leakage after installation of the refrigerant piping has been completed.
!
REFRIGERANT PIPING INSTALLATION
h Remove the front panel before pipe
connection
h Must check the pipe (liquid pipe, gas
pipe) before pipe connection
① Pipe joint (auxiliary parts): Securely perform brazing with a nitrogen
blow into the service valve port.(Releasing pressure : 0.02 MPa or
less)
② Cap: Remove caps and operate valve, etc. After operation, always
reattach caps (tightening torque of valve cap: 25Nm (250kg-cm) or
more). (Don't remove the internal part of the port)
③ Service port: Make the refrigerant pipe vacuum and charge it using
the service port. Always reattach caps after completing work (tightening torque of service cap: 14Nm (140kg-cm) or more).
④ Liquid pipe
⑤ Gas pipe
⑥ Elbow joint (field supply)
Liquid pipe
Gas pipe
Elbow
Ball Valve(Gas Pipe)
Ball Valve
(Liquid Pipe)
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
Open status when both the pipe and the valve are
in a straight line.
Cut both the pipe and the valve with a cutter to
suit the length
(Don't cut the length of less than 70mm)
CLOSE OPEN
Page 14
14
ENGLISH
Connection of Outside units
AB
ABC
C
(Master) (Slave1)
(Master) (Slave1) (Slave2)
ABC
(Master) (Slave1) (Slave2)D(Slave3)
2 Unit
3 Unit
4 Unit
ARCNN21
ARCNN31
ARCNN41
A
C
Outside units Model
Gas Pipe
Liquid Pipe
111
130
416
408
I.D.28.58 I.D.28.58
I.D.34.9
I.D.41.3 I.D.38.1
O.D.34.9
I.D.31.8
I.D.22.2
I.D.28.58
I.D.15.88 I.D.15.88
I.D.15.88
I.D.19.05
I.D.12.7
I.D.12.7
I.D.9.52
331
83
70
314
I.D.22.2
O.D.19.05
341
111
125
298
I.D.34.9
I.D.41.3
I.D.41.3
O.D.34.9
I.D.28.58
334
281
I.D.15.88
I.D.19.05
I.D.19.05
I.D.12.7
83
I.D.22.2
134
415
375
I.D.44.48 I.D.53.98
I.D.41.3
I.D.28.58
334
281
I.D.15.88
I.D.19.05
O.D.22.2I.D.25.4
I.D.19.05
I.D.12.7
83
80
I.D.22.2
* Install the branch pipe between outside units so that the outlet pipe
is parallel to the surface.
Viewed from point A
in direction of arrow
Within +/- 10°
Do not cut for
70mm or less
Execute the
welding while
pouring
nitrogen
When installing the branch pipe vertically between the outside
units, the refrigerant can be uneven between the outside units,
leading to compressor burn and reduced capacity.
CAUTION
!
INSTALLATION OF WATER PIPE
Water pipe system diagram
- The water pressure resistance of the water pipe system of this
product is 1.98MPa
- When the water pipe passes indoors, make sure to execute heat
insulation on the pipe so that water drops do not form on the
outer side of the water pipe.
- The size of the drain pipe must be equal to or larger than the diameter of the connecting product.
Always install a trap so that the drained water does not back flush.
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. We
recommend the following table as the minimum
wall thickness.
2 Commercially available piping often contains dust and other materi-
als. Always blow it clean with a dry inert gas.
3 Use care to prevent dust, water or other contaminants from enter-
ing 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 sep-
arately.
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.
9 The Multi V will stop due to an abnormality like excessive or insuffi-
cient 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 com-
pressor but also deteriorate the performance.
11 Never use refrigerant to perform an air purge. Always evacuate
using a vacuum pump.
12 Always insulate the piping properly. Insufficient insulation will re-
sult 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 Outside Unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the Outside 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.
Ⓐ To Outside Unit
Ⓑ Sealed Piping
8 A second branch cannot be made after a header. (These are shown
by .)
Outer diameter
[mm]
6.35 9.52 12.7 15.88 19.05 22.2 25.4 28.58 31.8 34.9 38.1 41.3 44.45 53.98
Minimum
thickness [mm]
0.8 0.8 0.8 0.99 0.99 0.99 0.99 0.99 1.1 1.21 1.35 1.43 1.55 2.1
Y branch
Header
4 branch 7 branch 10 branch
ARBLB01621, ARBLB03321,
ARBLB07121, ARBLB14521,
ARBLB23220
ARBL054 ARBL057 ARBL1010
ARBL104 ARBL107 ARBL2010
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.
!
A
A
B
Page 15
15
ENGLISH
CAUTION
Do not directly connect the drain outlet to the water pipe outlet.
(It can cause problems to the product.)
!
- Always install a strainer (50Mesh or above) at the entrance of the
water pipe. (When sand, trash, rusted pieces get mixed into the
water supply, it can cause problems to the product due to blocking)
If On/Off valve is applied, by interlocking with outside unit, it can
save the energy consumption of pump by blocking the water supply to the outside unit not operating. Select appropriate valve and
install on site if necessary.
- Install a pressure gauge and temperature gauge at the inlet and
outlet of the water pipe.
- Flexible joints must be installed not to cause any leakage from the
vibration of pipes.
- Install a service port to clean the heat exchanger at the each end
of the water inlet and outlet.
- For the components of the water pipe system, always use components above the designed water pressure.
Water pipe connection
- The water pipe should be the same size of the connection on the
product or more.
- If necessary install the insulation material in the water pipe
inlet/outlet to prevent water drop, freeze and to save energy.
(Use the above 20mm thickness PE insulation material.)
- Tightly connect the socket to the water pipe refer to below table
for recommended specification.
(Too much torque may cause the damage of the facility.)
Strainer on water pipe
DEVICE PROTECTION UNIT
Upper graph is a theoretical value for selection and it may be different
according to specification of strainer.
To protect the water cooling type product, you must install a strainer
with 50 mesh or more on the heat water supply pipe.
If not installed, it can result in damage of heat exchanger by the following situation.
1 Heat water supply within the plate type heat exchanger is com-
posed of multiple small paths.
2 If you do not use a strainer with 50 mesh or more, alien particles
can partially block the water paths.
3 When running the heater, the plate type heat exchanger plays the
role of the evaporator, and at this time, the temperature of the
coolant side drops to drop the temperature of the heat water supply, which can result in icing point in the water paths.
4 And as the heating process progresses, the water paths can be par-
tially frozen to lead to damage in plate type heat exchanger.
5 As a result of the damage of the heat exchanger from the freezing,
the coolant side and the heat water source side will be mixed to
make the product unusable.
Head loss of strainer on water pipe
ARWN100LAS4 ARWN200LAS4
Flow switch work
- It is recommended to install the flow switch to the water collection
pipe system connecting to the outside unit.
(Flow switch acts as the 1st protection device when the heat water is
not supplied. If a certain level of water does not flow after installing
the flow switch, an error sign of CH24 error will be displayed on the
product and the product will stop operating.)
- When setting the flow switch, it is recommended to use the product
with default set value to satisfy the minimum flow rate of this product. (The minimum flow rate range of this product is 50%. Reference
flow rate : 10HP – 96LPM, 20HP – 192LPM)
- Select the flow switch with the permitted pressure specification considering the pressure specification of the heat water supply system.
(Control signal from outside unit is AC 220V.)
Water pipe
outlet
Water pipe
Inlet
Pressure gauge
Gate valve
Gate valve
Temperature gauge
Service port
Strainer
Service port
Heat Source
Water
1. Pollution of
Heat source
Refrigerant
2. Partially frozen
3. Damage
Condensed
water drain
Drain line
Water pipe
connection
Bending
moment
Torque
Pipe thickness Shear stress Tensile stress
mm inch (kN) (kgf) (kN) (kgf) (N.m) (kgf.m)(N.m) (kgf.m)
12.7 1/2 3.5 350 2.5 250 20 23 5 3.5
19.05 3/4 12 1200 2.5 250 20 2 115 11.5
25.4 1 11.2 1120 4 400 45 4.5 155 15.5
31.8 1 1/4 14.5 1450 6.5 650 87.5 8.75 265 26.5
38.1 1 1/2 16.5 1.7 9.5 0.95 155 16 350 35.5
50.8 2 21.5 2.2 13.5 1.4 255 26 600 61
Water pipe outlet
Water pipe inlet
: Suggestion range
60
50
45
30
kpa
15
0
0 30 60 90 120 150
I/min
96
60
50
45
30
kpa
15
0
0 60 120 180 240 300
: Allowed range
192
I/min
Page 16
16
ENGLISH
Installation of flow switch
- The flow switch must be installed at the horizontal pipe of the heat
water supply outlet of the product and check the direction of the heat
water flow before the installation. (Picture 1)
- When connecting the flow switch to the product, remove the jump
wire to connect to the communication terminal (5(A) and 5(B)) of the
outside unit control box. (Picture 2, 3) (Open the cover of the flow
switch and check the wiring diagram before connecting the wires.
The wiring method can differ by the manufacturer of the flow switch.)
- If necessary, adjust the flow rate detection screw after consulting
with an expert and adjust to the minimum flow rate range. (Picture 4)
(Minimum flow rate range of this product is 50%. Adjust the flow
switch to touch the contact point when the flow rate reaches 50% of
the flow rate.)
- Reference flow rate : 10HP – 96LPM, 20HP – 192LPM
CAUTION
• If the set value does not satisfy the minimum flow rate or if the
set value is changed by the user arbitrarily, it can result in product performance deterioration or serious product problem.
• If the product is operated with the heat water supply not flowing smoothly, it can damage the heat exchanger or cause serious product problems.
• In case of CH24 or CH180 error, there is a possibility that the
plate type heat exchanger is partially frozen inside. In this case
resolve the issue of partial freezing and then operate the product again. (Cause of partial freezing : Insufficient heat water
flux, water not supplied, insufficient coolant, alien particle penetrated inside plate type heat exchanger)
• When the product operates while the flow switch touches the
contact point at the flow rate range out of the permitted range,
it can cause product performance deterioration or serious product problem.
• Must use the normal closed type flow switch
- Circuit of outside unit is normal closed type.
!
Y branch method
Combination of Y
branch/header method
Header method
Ⓐ : Outside Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓐ : Outside Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header
Ⓕ : Sealed piping
Ⓐ : Outside Unit
Ⓑ : 1st branch
Ⓒ : Indoor Units
Ⓓ : Sealed piping
Ⓔ : Header
Ⓐ : Outside Unit
Ⓑ : 1st branch (Y branch)
Ⓒ : Indoor Units
Ⓓ : Downward Indoor Unit
Ⓔ : Connection branch
pipe between Outside
units: ARCNN41
Ⓕ : Connection branch
pipe between Outside
units : ARCNN31
Ⓖ : Connection branch
pipe between Outside
units : ARCNN21
PIPE CONNECTIONS BETWEEN
INDOOR AND OUTSIDE UNIT
1 Outside Unit
Y branch method
Combination of Y branch/
header method
Ⓐ : Outside Unit
Ⓑ : 1st branch(Y branch)
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Connection branch pipe
between Outside units :
ARCNN41
Ⓕ : Connection branch pipe
between Outside units :
ARCNN31
Ⓖ : Connection branch pipe
between Outside units :
ARCNN21
Ⓗ : Header
Ⓘ : Sealed piping
l 40m (90 m : Conditional application)*
L150m (200 m : Conditional application)*
h 40m
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
H
I
Slave3
Slave2
Slave1
Master
H 50m
10m or
less
Series Outside Units (2 Units ~ 4 Units)
h * : See the Table 4
h * : See the Table 4
h * : See the Table 4
h * : See the Table 4
Refrigerant piping system
Cover
Micro-switch
Adjustment screw
Vibration plate
Bellows
1 inch or
3/4 inch
socket
Pad
H 50m
H 50m
H 50m
L150m (200 m : Conditional application)*
l 40m (90 m : Conditional application)*
h 40m
L150m (200 m : Conditional application)*
l 40m (90 m : Conditional application)*
L 150m
l 40m
Indoor
Unit
h 40m
Picture 1 Picture 2
Picture 3
Picture 4
h 40m
Slave3
Slave2
10m or
less
Slave1
H 50m
Master
C
h 40m
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
L150m (200 m : Conditional application)*
l 40m (90 m : Conditional application)*
C
CC
Indoor
Unit
Page 17
17
ENGLISH
(Table 2) Refrigerant pipe diameter from outside unit to first branch. (A)
h * : See Table 4
Upward
Outside unit
total capacity
Standard Pipe
Diameter
Increased Pipe Diameter
When equivalent pipe length is 90m
or more from ODU to farthest IDU
HP
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
8 Ø 9.52(3/8) Ø 22.2(7/8) Ø 12.70(1/2) Ø 22.2(7/8)
10 Ø 9.52(3/8) Ø 22.2(7/8) Ø 12.70(1/2) Ø 25.4(1)
12 ~ 14 Ø 12.7(1/2) Ø 25.4(1) Ø 15.88(5/8) Ø 28.58(1-1/8)
16 Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 15.88(5/8) Ø 31.8(1-1/4)
18 ~ 20 Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 15.88(5/8) Ø 31.8(1-1/4)
22 ~ 34 Ø 19.05(3/4) Ø 34.9(1-3/8) Ø 22.2(7/8) Ø 38.1(1-1/2)
36 ~ 60 Ø 19.05(3/4) Ø 41.3(1-5/8) Ø 22.2(7/8) Ø 41.3(1-5/8)
62 ~ 64 Ø 22.2(7/8) Ø 44.5(1-3/4) Ø 25.4(1) Ø 53.98(2-1/8)
66 ~ 80 Ø 22.2(7/8) Ø 53.98(2-1/8) Ø 25.4(1) Ø 53.98(2-1/8)
Classifica-
tion
Section Type Y branch
Y/header branch
Header
branch
Max pipe
length
Outside Unit
÷
Indoor Unit
Maximum
pipe
length(L)
A+B+C+D+e
≤
150 m
(Conditionally 200 m)*
A+B+b ≤150 m
A+C+e ≤150 m
(Conditionally
200m)*
A+f
≤
150 m
Equivalent
pipe length
175 m
(Conditionally
225 m)*
175 m
(Conditionally
225 m)*
175 m
Total pipe
length
300 m
(Conditionally
500 m)*
300 m
(Conditionally
500 m)*
300 m
(Condition-
ally 500 m)*
Max
difference
in height
Outside Unit
÷ Indoor Unit
Difference in
height(H)
50 m 50 m
50 m
Indoor Unit
÷ Indoor Unit
Difference in
height(h)
40 m 40 m
40 m
Longest pipe
length after
1st branch
Pipe
length(l)
40 m
(Conditionally
90m)*
40 m
(Conditionally
90m)*
40 m
( Table 1 ) Limit Pipe length
WARNING
Increased Pipe Diameter(table 2)
- When pipe length is Over 40m from 1st branch to longest IDU.
!
Header method
Ⓐ : Outside Unit
Ⓑ : Header
Ⓒ : Indoor Units
Ⓓ : Sealed piping
Ⓔ : Connection branch pipe
between Outside units :
ARCNN41
Ⓕ : Connection branch pipe
between Outside units :
ARCNN31
Ⓖ : Connection branch pipe
between Outside units :
ARCNN21
Pipe Connection Method between outside unit
/indoor unit
h See Table 2
A : Refrigerant pipe diameter from outside unit to first branch
E : Refrigerant pipe diameter for outside unit capacity
(Slave 1+ Slave 2+ Slave 3)
F : Refrigerant pipe diameter for outside unit capacity
(Slave 2+ Slave 3)
G : Refrigerant pipe diameter for outside unit capacity(Slave 3)
Level Difference (H1)
(Outside unit ÷ Outside unit)
2m
Max length from first branch to
each outside unit (L1,L2,L3,L4)
Less than 10m
(equivalent length of piping 13m)
(Table 3) Refrigerant pipe diameter from first branch to last branch (B,C,D)
Downward indoor unit
total capacity [kW(Btu/h)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
≤ 5.6(19,100)
Ø6.35(1/4) 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)
< 33.6 (114,700) Ø9.52(3/8) Ø22.2(7/8)
< 50.4 (172,000) Ø12.7(1/2) Ø28.58(1-1/8)
< 67.2 (229,400) Ø15.88(5/8) Ø28.58(1-1/8)
< 72.8(248,500) Ø15.88(5/8) Ø34.9(1-3/8)
< 100.8(344,000) Ø19.05(3/4) Ø34.9(1-3/8)
< 173.6(592,500) Ø19.05(3/4) Ø41.3(1-5/8)
< 184.8(630,700) Ø22.2(7/8) Ø44.5(1-3/4)
≤ 224.0(764,400)
Ø22.2(7/8) Ø53.98(2-1/8)
(Table 4) Conditional Application
To satisfy below condition to make 40 m ~ 90 m of pipe length after first branch.
Required Example
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
40 m < B+C+D+e ≤ 90 m
’
B, C, D Change a
diameter
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
≤ 500 m
3
Length of pipe from each
indoor unit to the closest
branch ≤ 40 m
a,b,c,d,e ≤ 40 m
4
Length of pipe from outdoor unit to the farthest
indoor unit 5
(A+B+C+D+e)] - [Length
of pipe outdoor unit to the
closest indoor unit 1
(A+a)] ≤40 m
(A+B+C+D+e)-
(A+a)
≤ 40 m
Ø6.35’Ø9.52, Ø9.52’Ø12.7,
Ø12.7’Ø15.88, Ø15.88’Ø19.05,
Ø19.05’Ø22.2, Ø22.2’Ø25.4,
Ø25.4’Ø28.58, Ø28.58’Ø31.8,
Ø31.8 ’Ø34.9, Ø34.9’Ø38.1
10m or
less
Slave3
Slave2
Slave1
Master
ODU Capacity
Master ≥ Slave 1 ≥Slave 2 ≥Slave 3
H 50m
h 40m
C
C
C C C
L 150m
l 40m
C
Master
L2
L3
Indoor
Unit
h 40m
E GF
1st branch
l 40m
Slave1
H1
L4
L1
Refrigerant pipe diameter from outside unit to first branch
Slave2
Slave3
IDU
Direction
L
H 50 m
40 m
Page 18
18
ENGLISH
WARNING
Pipe length after header branching (a~f)
It is recommended that difference in length of the pipes con-
nected to the Indoor Units is minimized. Performance difference
between Indoor Units may occur.
!
WARNING
•
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
20HP(58kW) outside unit .
1) Outside unit main pipe diameter A : Ø28.58(Gas pipe),
Ø12.7(liquid pipe)
2)
Pipe diameter B after first branch according to 120% indoor unit
ombination(69.6kW) : Ø28.58(gas pipe), Ø15.88(liquid pipe)
Therefore, pipe diameter B connected after first branch
would be Ø28.58(gas pipe) / Ø12.7(liquid pipe) which is
same with main pipe diameter.
!
Outside unit Connection
Indoor Unit Connection
Indoor unit connecting pipe from branch (a~f)
Indoor Unit capacity
[kW(Btu/h)]
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
≤ 5.6(19,100)
Ø6.35(1/4) 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)
< 28.0(95,900) Ø9.52(3/8) Ø22.2(7/8)
CAUTION
• Bending radius should be
at least twice the diameter
of the pipe.
• Bend pipe after 500 mm or
more from branch
(or header).
Do not bend U type.
It may cause Performance
unsatisfactory or noise.
!
Pipe Connection Method/Precautions for
Series connections between Outside units
- Separate Y branch joints are needed for series connections between
outside units.
- Please refer to the below connection examples to install pipe connections between outside units.
- If the distance between the outside unit s becomes more than 2m,
apply Oil Traps between the gas pipes.
- If the outside unit is located lower than the main pipe, apply Oil Trap.
Pipe connection between outside
units (General Case)
The maximum pipe
length after the first
branching between the
outside unit is 10m or les
Pipes between outside units
are 2m or less
2m or less
Pipes between outside unit
s are 2m or longer
Oil Trap
Oil Trap Oil Trap
2m or less
2m or less
2m or less
0.2m or more
2m or longer
2m or longer2m or longer
Oil trap application method between outside units
- Because of the possibility of oil being accumulated in the outside unit
that has stopped, when there is a height difference between outside
unit pipes or if the pipe distance between the outside units is over
2m, you must always apply an oil trap. (But, the oil trap between outside units is limited to 1 time and is only applied to the gas pipe.)
- If the pipe distance between the outside units is 2m or below, and if
the location of the main pipe is lower than that of the outside unit and
if the location of the main pipe is lower than that of the outside unit,
the oil trap does not have to be applied.
- If the location of the main pipe is higher than the location of the outside unit, be careful since the oil can be accumulated in the stopped
outside unit.
- If there is high/low difference between the outside unit pipes, oil can
be accumulated to the outside unit on the lower location until the unit
stops.
- The pipes between the outside unit s must maintain horizontal levelness or give an inclination to prevent a back flow toward the slave
outside unit. Otherwise, the unit may not operate properly.
Examples of Wrong Pipe Connections
Toward indoor unit
Toward indoor unit
Pipe inclination
(2 or more)
Toward indoor unit
Toward indoor unit
Toward indoor unit
Toward indoor unit
(Example 1)
(Example 2)
(Example 3)
500mm or more
500mm or more
If the main pipe is
higher than the
outside unit, oil is
accumulated in the
outside unit.
If there are differences in the height
between the outside unit, oil is
accumulated in the lower outside unit.
Oil Trap
Page 19
19
ENGLISH
- Apply Oil Trap as shown below when the length of the pipe between
the outside units is more than 2m. Otherwise, the unit may not operate properly.
(Example 1)
Toward indoor unit
Toward indoor unit
2m
2m
2m
0.2m
Oil Trap
(Example 2)
- When connecting the pipes between the outside units, the accumulation of oil in the slave outside unit should be avoided. Otherwise, the
unit may not operate properly.
(Example 1)
Toward indoor unit
Toward
indoor unit
h
Toward indoor unit
(Example 2)
h
h
0.2m
Toward indoor unit Toward indoor unit
Oil Trap
(Example 3)
The amount of Refrigerant
The calculation of the additional charge should take into account the
length of pipe and CF(correction Factor) value of indoor unit.
Total liquid pipe : Ø25.4 mm
Additional charge(kg)
Total liquid pipe : Ø22.2 mm
Total liquid pipe : Ø19.05 mm
Total liquid pipe : Ø15.88 mm
Total liquid pipe : Ø12.7 mm
Total liquid pipe : Ø9.52 mm
Total liquid pipe : Ø6.35 mm
CF value of indoor unit
=
+
+
+
+
+
+
x 0.480(kg/m)
x 0.354(kg/m)
x 0.266(kg/m)
x 0.173(kg/m)
x 0.118(kg/m)
x 0.061(kg/m)
x 0.022(kg/m)
Amount refrigerant of Indoor units
Example) 4Way Ceiling Cassette 14.5kW -1ea, Ceiling concealed
Duct 7.3kW-2ea, Wall Mounted 2.3kW-4ea
CF = 0.64 × 1 + 0.26 × 2 + 0.24 × 4 = 2.12 kg
Attach the additional refrigerant table of IDU.
Page 20
20
ENGLISH
Ⓐ Manifold Gauge
Ⓑ Low pressure side Handle
Ⓒ High pressure side Handle
WARNING
• Pipe to be vacuumed : gas pipe, liquid pipe
• If the refrigerant amount is not exact, it may not operate
properly.
• If additionally bottled refrigerant amount is over 10%, condenser
burst or insufficient indoor unit performance may be caused.
!
Refrigerant charging
- Ensure that the branch pipes are attached vertically.
Slave
Master
Header
Slave
Master
Slave
Master
Slave
Master
Slave
Master
Slave
Master
1st
1st
1st
Main pipe
Distribution
2nd
2nd
3rd
3rd
Main pipe
Distribution
Slave
Master
1st
3rd
3rd main pipe distribution
2nd
Horizontal Distribution
Vertical Distribution
The others
Distribution Method
WARNING
• Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following
equation for human safety.
If the above equation can not be satisfied, then follow the following steps.
• Selection of air conditioning system: select one of the next
- Installation of effective opening part
- Reconfirmation of Outside Unit capacity and piping length
- Reduction of the amount of refrigerant
- Installation of 2 or more security device (alarm for gas leakage)
• Change Indoor Unit type
:
installation position should be over 2m from the floor (Wall
mounted type ’ Cassette type)
• Adoption of ventilation system
: choose ordinary ventilation system or building ventilation sys-
tem
• Limitation in piping work
: Prepare for earthquake and thermal stress
!
Volume of the room at which Indoor Unit of
the least capacity is installed
Total amount of refrigerant in the system
≤0.44 (kg / m3)
Liquid pipe
Gas pipe
Page 21
21
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.
- Fit branch pipe lie in a horizontal plane.
Horizontal plane
View from point B in the direction of the arrow
Y branch
Header
A
B
A
B
Ⓐ To Branch Piping or Indoor Unit
Ⓑ To Outside Unit
- Ensure that the branch pipes are attached horizontally or vertically
(see the diagram below.)
- 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.
Ⓐ To Outside Unit
Ⓑ 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.
ⓒ 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.
Branch pipe Fitting
- Header should be insulated with the insulator in each kit.
- Joints between branch and pipe should be sealed with the tape included in each kit.
- Any cap pipe should be insulated using the insulator provided with
each kit and then taped as described above.
Y branch pipe
Models Gas pipe Liquid pipe
ARBLN
01621
I.D19.05
O.D15.88
I.D12.7
I.D15.88
I.D12.7
I.D15.88
I.D15.88
I.D12.7
292
281
74
70
I.D12.7
O.D9.52
I.D6.35
I.D9.52
I.D.9.52
I.D.6.35
I.D9.52
I.D.6.35
292
281
74
70
1
1
ARBLN
03321
I.D25.4
413
390
83
I.D15.88
I.D19.05
I.D12.7
I.D12.7I.D19.05I.D15.88I.D19.05I.D22.2
I.D28.58
O.D25.4
I.D22.2
O.D19.05
O.D19.05
I.D22.2
I.D25.4
70 80 11 0
1
2
3
3 1 2
70
I.D9.52
I.D12.7
53.6D.I25.9D.I
I.D9.52
I.D12.7
I.D6.35
I.D12.7
332
321
74
ARBLN
07121
376
404
96
I.D34.9
O.D31.8
I.D22.2
O.D22.2
I.D28.58
I.D31.8
O.D19.05
I.D28.58
120 90 12 0
I.D31.8
2.22D.I85.82D.I
I.D19.05
I.D15.88
I.D12.7
I.D19.05
I.D15.88
2
3
1
2
1 3
25.9D.I25.9D.I7.21D.O
I.D15.88 I.D19.05
I.D12.7
I.D12.7
I.D19.05
I.D15.88I.D12.7
I.D19.05
O.D12. 7I.D6.35
I.D15.88
371
394
83
11 0 70
2
3
3 2
ARBLN
14521
10 90 10
471
517
125
120 130
I.D19.05
I.D15.88
I.D12.7
I.D19.05
I.D22.2
I.D41.3 I.D38.1
I.D41.3
O.D34.9
I.D34.9
I.D34.9
I.D22.2
I.D28.58
I.D28.58I.D38.1
I.D41.3
I.D34.9
I.D38.1
O.D22.2
O.D38.1
O.D15.88
O.D28.58
90
2
3
3
3
2
2
3
416
444
96
O.D15.88 I.D9.52
I.D12.7
O.D12. 7 I.D6.35
I.D9.52
I.D15.88 I.D19.05
I.D22.2
I.D22.2
I.D19.05
I.D15.88
I.D12.7
I.D15.88
I.D19.05
I.D22.2
O.D19.0 5
80
11 0 11 0
2
3
1
2 3 3
ARBLN
23220
O.D.28.58
I.D.22.2
115
X2
100
O.D15.88
I.D12.7
70
O.D.22.2
I.D.15.88I.D.19.05
120
O.D.38.1
I.D.34.9
I.D.28.58 O.D.44.48
X2
175
I.D31.8 I.D.53.98 I.D.25.4
I.D.44.48
I.D.44.48
I.D38.1I.D41.3
I.D.44.48
I.D38.1I.D41.3
I.D.53.98
420
490
134
1
2
3
32
3 3
3
3
2
O.D.19.05 I.D.12.7
I.D.15.88
O.D12.7 I.D6.35
I.D9.52
X2
110 110
I.D25.4 I.D22.2
I.D.19.05
I.D.19.05I.D.22.2
I.D.25.4
I.D.25.4
I.D.22.2
346
379
96
2
3 32
3
[unit:mm]
Horizontal
plane
Within ±10°
A
Viewed from point A
in direction of arrow
Facing
downwards
Within ±3° Within ±3°
Tape
(field supply)
Facing
upwards
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
Tape
Insulator
Insulator of field pipe
Insulator for cap pipe
Insulator
(included with kit)
Liquid and gas
pipe joints
Insulator for
field piping
C
Cap pipe
Tape
B
Pinched pipe
Page 22
22
ENGLISH
[unit:mm]
Leak test
Leak test should be made by pressurizing nitrogen gas to 3.8
MPa(38.7kgf/cm
2
). 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.
Indoor unit
Slave 2 outside unit Slave 1 outside unit Master outside unit
Liquid side
Gas side
Liquide pipe
Gas pipe
Liquide pipe
Gas pipe
Liquide pipe
Gas pipe
Close
Close
Close
Close
Close
Close
Nitrogen gas
cylinder
Leak Test and Vacuum drying
Header
Models Gas pipe Liquid pipe
4 branch
ARBL054
120
150
360
120
ID15.88
ID12.7
ID12.7
ID15.88
ID15.88
ID19.05
120
120
150
360
ID9.52
ID9.52
ID6.35
ID6.35
ID9.52
ID12.7
7 branch
ARBL057
540
ID15.88
ID19.05
120
150
120
ID15.88
ID12.7
ID15.88
ID12.7
ID15.88
ID19.05
540
ID9.52
ID12.7
120
150
120
ID6.35
ID9.52
ID9.52
ID12.7
4 branch
ARBL104
120
150
400
160
ID15.88
ID12.7
ID19.05
ID15.88
ID22.2
ID28.58ID25.4
120
120
150
360
ID9.52
ID9.52
ID6.35
ID6.35
ID9.52
ID12.7
7 branch
ARBL107
120
150
160
580
ID19.05
ID15.88
ID15.88
ID12.7
ID22.2ID28.58 ID25.4
120
150
700
120
ID6.35
ID9.52
ID9.52
ID6.35
ID9.52ID12.7
10 branch
ARBL1010
120
150
160
760
ID19.05
ID15.88
ID15.88
ID12.7
ID22.2ID28.58 ID25.4
120
150
160
760
ID19.05
ID15.88
ID15.88
ID12.7
ID22.2ID28.58 ID25.4
10 branch
ARBL2010
120
150
182
775
ID19.05
ID15.88
ID15.88
ID12.7
ID28.58
ID31.8 ID34.9
120
150
107
60*9=540
700
ID6.35
ID9.52
ID19.05ID15.88
ID9.52
ID6.35
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 0.1 kg/cm2(0.01 MPa) 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
(3.8 MPa) is 27 °C
24 hour later: 3.73 MPa, 20°C
In this case the pressure drop of 0.07 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.
!
WARNING
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.
!
Vacuum
Vacuum drying should be made from the service port provided on the outside
unit ’s 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
(5 Torr, -755mmHg).
- Evacuate the system from the liquid and gas pipes with a vacuum
pump for over 2 hrs and bring the system to -100.7kPa. After maintaining system under that condition for over 1 hr, confirm the vacuum
gauge rises. The system may contain moisture or leak.
- Following should be executed if there is a possibility of moisture re-
maining 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(vacuum break) with nitrogen gas and then evacuate it again
with the vacuum pump for 1hr to -100.7kPa(vacuum drying). If the
system cannot be evacuated to -100.7kPa 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.
Scale
Use a graviometer. (One that can measure
down to 0.1kg). If you are unable to
prepare such a high-precision gravimeter
you may use a charge cylinder.
Vacuum pump
Indoor unit
Slave 2 outside unit Slave 1 outside unit Master outside unit
Liquid side
Gas side
Close
Liquide pipe
Gas pipe
Liquide pipe
Gas pipe
Liquide pipe
Gas pipe
Close
Close
Close
Close
Close
Page 23
23
ENGLISH
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 Outside units will be
opened.)
WARNING
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.
!
WARNING
When installing and 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.
!
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 off method
CAUTION
ODU operation stops during vacuum mode. Compressor can't
operate.
Master unit PCB DIP switch on : No.5
Vacuum mode
Select the mode using ‘▶’, ‘◀’ Button :
“SVC” Push the ‘●’ button
Select the Function using ‘▶’, ‘◀’ Button :
“Se1” Push the ‘●’ button
Start the vacuum mode : “VACC”
ODU V/V open
ODU EEV open
IDU EEV open
Dip switch off and push the reset button on Master unit PCB
!
Vacuum Mode
DIP SWITCH 7-Segment
SW01C ( : confirm)
SW02C ( : backward
: forward)
SW04C
( X : cancel)
SW01D (reset)
SW03C (
ȭ
ȯ
Ɨ
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.
Ⓐ Heat insulation material
Ⓑ Pipe
Ⓒ Outer covering(Wind the connection part and cutting part of heat in-
sulation material with a finishing tape.)
Heat insulation
material
Adhesive + Heat - resistant poly-
ethylene foam + Adhesive tape
Outer
covering
Indoor Vinyl tape
Floor ex-
posed
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.
Bad example
Thermal insulation of refrigerant piping
• Do not insulate gas or low pressure pipe and liquid or highpressure pipe together.
• Be sure to fully insulate connecting portion.
Ⓐ
These parts are not insulated.
Ⓐ Liquid pipe
Ⓑ Gas pipe
ⓒ Power lines
ⓓ
Finishing tape
ⓔ
Insulating material
ⓕ
Communication lines
A
C
D
E
B
F
A
Good example
Ⓐ Liquid pipe
Ⓑ Gas pipe
ⓒ Power lines
ⓓ
Insulating material
ⓔ
Communication lines
Communication lines
Separation
Power lines
E
D
D
B
A
C
Page 24
24
ENGLISH
A
B
E
B
I
A
B
D
C
1m1m
D
F
G
B
G
D
B
H
I
J
A
Penetrations
Ⓐ 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.)
Inner wall (concealed) Outer wall Outer wall (exposed)
Floor (fireproofing)
Penetrating portion on fire
limit and boundary wall
Roof pipe shaft
CAUTION
- Follow ordinance of your governmental organization for technical
standard related to electrical equipment, wiring regulations and guidance of each electric power company.
-
Install the Outside Unit communication cable 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.)
- Be sure to provide designated grounding work to Outside Unit.
- Give some allowance to wiring for electrical part box of Indoor and
Outside Units, because the box is sometimes removed at the time of
service work.
- Never connect the main power source to terminal block of communication cable. If connected, electrical parts will be burnt out.
- Use 2-core shield cable for communication cable.( mark in the figure below) If communication cable 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)
- Only the communication cable specified should be connected to the
terminal block for Outside Unit communication.
CAUTION
Be sure to correct the outside unit to earth. Do not connect ground
wire to any gas pipe, liquid pipe, lightening rod or telephone earth
line. If earth is incomplete, it may cause an electric shock.
!
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.
!
ELECTRICAL WIRING
2-Core Shield Cable
Multi-Core Cable
Remote
control
Remote
control
Remote
control
Remote
control
Indoor
Unit
Outside Unit
Outside Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Outside Unit
Outside Unit
Remote
control
Remote
control
Indoor
Unit
Indoor
Unit
Remote
control
Remote
control
Indoor
Unit
Indoor
Unit
Master Slave1 Slave2
Master Slave1 Slave2
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
Remote
controller
Outside unit
Outside unit
Remote
controller
Indoor
Unit
Indoor
Unit
Master Slave1 Slave2
Master Slave1 Slave2
Outside unit
Outside unit
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
Remote
controller
Remote
controller
Indoor
Unit
Indoor
Unit
2-Core Shield Cable
Multi-Core Cable
Page 25
25
ENGLISH
CAUTION
When the 400 volt power supply is applied to “N” phase by mistake,
check damaged parts in control box and replace them.
Precautions when laying power wiring
Use round pressure terminals for connections to the power terminal
block.
Round pressure terminal
Power cable
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.)
- When connecting cable which is the same thickness, do as shown in
the figure below.
- For wiring, use the designated power cable 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.
!
Control Box and Wiring Location
- Remove all of the screws at front panel and remove the panel by
pulling it forward.
- Connect communication cable between main and sub outside unit
through the terminal block.
- Connect communication cables between outside unit and indoor
units through the terminal block.
- When the central control system is connected to the outside unit, a
dedicated PCB must be connected between them.
- When connecting communication cable between outside unit and indoor units with shielded cable, connect the shield ground to the earth
screw.
Communication and Power Cables
Communication cable
- Types : shielding wire CVVS or CPEVS
- Cross section : 1.0 ~ 1.5 mm
2
- Insulation material : PVC
- Maximum allowable temperature: 60°C
- Maximum allowable line length: under 300m
Remote control cable
- Types : 3-core cable
Central control cable
Separation of communication and power cables
- If communication and power cables 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 cables where these are to be
run side by side
Current capacity of power cable Spacing
100V or more
10A 300mm
50A 500mm
100A 1000mm
Exceed 100A 1500mm
Main PCB
Noise Filter
External PCB
Take care of the
phase sequence of
3-phase 4-wire
power system
Product type Cable type Diameter
ACP&AC Manager 2-core cable (Shielding cable)
1.0~1.5mm
2
AC Smart 2-core cable (Shielding cable)
1.0~1.5mm
2
Simple central controller 4-core cable (Shielding cable)
1.0~1.5mm
2
NOTE
!
• The figures are based on assumed length of parallel cabling up
to 100m. For length in excess of 100m the figures will have to
be recalculated in direct proportion to the additional length of
cable involved.
• If the power supply waveform continues to exhibit some distortion the recommended spacing in the table should be increased.
- If the cable are laid inside conduits then the following point
must also be taken into account when grouping various cable
together for introduction into the conduits
- Power cable(including power supply to air conditioner) and
communication cables must not be laid inside the same
- In the same way, when grouping the power wires and communication cables should not be bunched together.
CAUTION
• If apparatus is not properly earthed then there is always a risk of
electric shocks, the earthing of the apparatus must be carried out
by a qualified person.
!
CAUTION
• Use the 2-core shield cables for communication cables. 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.
!
Front
Panel
Page 26
26
ENGLISH
Wiring of main power supply and equipment
capacity
- Use a separate power supply for the Outside Unit and Indoor Unit.
- Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
- The cable 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%.
- Specific wiring requirements should adhere to the wiring regulations
of the region.
- Don't install an individual switch or electrical outlet to disconnect
each of indoor unit separately from the power supply.
Ground wire
1 The power wire Between the master outside unit and slave1 out-
side unit - minimum : 6 mm
2
2 The power wire Between the slave1 outside unit and slave2 out-
side unit - minimum : 4 mm
2
3 The power wire Between the slave2 outside unit and slave3 out-
side unit - minimum : 2.5 mm
2
h Power supply cords of appliances for outside unit use shall not be
lighter than polychloroprene sheathed flexible cord
(code designation 60245 IEC 57).
h Please use the 3-phase 4-wire quadrupole Leakage circuit breaker of
circuit breaker.
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.
!
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 cables 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.
!
Field Wiring
Single outside unit
R S T N
Switch
Fuse
L
N
Communication cable
(2 Wires Cable)
Power cable
(4 Wires Cable)
Communication cable
(3 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
[Outside Unit]
[Indoor Units]
Outside
Power supply
(3Ø 4wires)
Indoor
Power supply
(1Ø 2wires)
(Main Switch)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Frequency
Voltage range(V)
Outside Indoor
60Hz 380V 220V
50Hz 380-415V 220-240V
Master
Outside unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
34 34 34
[Heat Pump]
Between Indoor and Master Outside unit
The GND terminal at the
main PCB is a ‘-’ terminal
for day contact, it is not
the point to make ground
connection.
WARNING
• Indoor Unit ground wires 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.
!
The thickness of Minimum wire (mm2)
Leakage circuit breaker
(4P ELCB)
Main power
wire
Branch wire Ground wire
1 Unit 2.5~6 - 2.5
Below 30~50A
100mA 0.1sec
2 Unit 10~16 - 2.5
Below 75~100A
100mA 0.1sec
3 Unit 25~35 - 4
Below 125~150A
100mA 0.1sec
4 Unit 70 - 6
Below 175~200A
100mA 0.1sec
Page 27
27
ENGLISH
Series outside units
When the power source is supplied to Each outside unit individually.
R S T N
Switch
Fuse
L
N
Communication cable
(2 Wires Cable)
Power cable
(4 Wires Cable)
Communication cable
(3 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
Power cable
(2 Wires Cable)
[Indoor Units]
Outside
Power supply
(3Ø 4wires)
Indoor
Power supply
(1Ø 2wires)
(Main Switch)
R S T N
Switch
Fuse
R S T N
Switch
Fuse
R S T N
Switch
Fuse
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
[Master] [Slave1] [Slave2] [Slave3]
Frequency
Voltage range(V)
Outside Indoor
60Hz 380V 220V
50Hz 380-415V 220-240V
Slave1
Outside unit
Master
Outside unit
Slave2
Outside unit
Slave3
Outside unit
34 34 34
Master
Outside unit
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 GND 12V
[Heat Pump]
Between Indoor and Master Outside 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 outside unit s
are matched.(A-A,B-B)
WARNING
• Indoor Unit ground wires 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.
!
u Example Connection of Communication Cable
[BUS type] [STAR type]
- Connection of communication
cable must be installed like
below figure between indoor
unit to outside unit .
- Abnormal operation can be
caused by communication defect, when connection of communication cable is installed like
below figure(STAR type).
Example) Connection of power and communication cable (UWC)
Main power
terminal block
Ground wire
Power/
Ground cable
Over
50mm gap
Communication
cable
Main power
terminal block
Insulation sleeves
attachments
Fix firmly not
to be displaced
ODU-IDU
Communication cable
ODU-ODU
Communication cable
Main Power Connection Communication Connection
CAUTION
It should be wiring power cables or communication cables to avoid
interference with the oil level sensor. Otherwise, That oil level sensor
would be operated abnormally.
!
Page 28
28
ENGLISH
Automatic Addressing
The address of indoor units would be set by Automatic Addressing
- Wait for 3 minutes after supplying power.
(Master and Slave outside unit s, indoor units)
- Press RED button of the outside unit s for 5 seconds. (SW01C)
- A “88” is indicated on 7-segment LED of the outside unit PCB.
- For completing addressing, 2~7 minutes are required depending on
numbers of connected indoor units
-
Numbers of connected indoor units whose addressing is completed are
indicated for 30 seconds on 7-segment LED of the outside unit PCB
- After completing addressing, address of each indoor unit is indicated
on the wired remote control display window. (CH01, CH02,
CH03, ……, CH06 : Indicated as numbers of connected indoor units)
[MAIN PCB]
DIP-SWITCH 7 - Segment
SW01C ( : confirm)
SW02C (ඔ : backward)
SW03C (ඖ : forward)
SW04C (
: cancel)
SW01D (reset)
CAUTION
• In replacement of the indoor unit PCB, always perform Automatic
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.
• Automatic Addressing is only possible on the master Unit.
• Automatic Addressing has to be performed after 3 minutes to improve communication.
!
The Procedure of Automatic Addressing
Dip switch setting
Setting the function
Select the mode/function/option/value using ‘▶’, ‘◀’ Button and con-
firm that using the ‘●’ button after dip switch No.5 is turned on.
CAUTION
It is only executed when all indoor units are off.
!
Checking the setting of outside units
Checking according to dip switch setting
- You can check the setting values of the Master outside unit from the
7 segment LED.
The dip switch setting should be changed when the power is OFF.
Checking the initial display
The number is sequentially appeared at the 7 segment in 5 seconds
after applying the power. This number represents the setting condition.
• Initial display order
• Example) ARWN620LAS4
• Master Unit • Slave Unit
Dip switch setting Dip switch setting ODU Setting
Slave 1
Slave 2
Slave 3
Order No Mean
①
8~20 Master model capacity
②
10~20 Slave 1 model capacity
③
10~20 Slave 2 model capacity
④
10~20 Slave 3 model capacity
⑤
8~80 Total capacity
⑥
1 Cooling Only
2 Heat Pump
3 Heat Recovery
⑦
38 380V model
46 460V model
22 220V model
⑧
1 LAS4
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
20 20 12 10 62 2 38 1
Power On
Waiting 3 minutes
Press RED Button for 5 s
(SW01C)
7-segment LED = 88
Don’t press RED Button
(SW01C)
Waiting about 2~7 minutes
7-segment LED
= 88
YES
OK
Automatic addressing start
• Automatic addressing setting end
Numbers of indoor unit connection set whose
addressing is completed are indicated for 30seconds
on 7-segment LED after completing setting
NO Check the connections
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 Automatic addressing is completed normally.
of communication cable
Page 29
29
ENGLISH
Group Number setting
Group Number setting for Indoor Units
- Confirm the power of whole system(Indoor Unit, Outside Unit) is
OFF, otherwise turn off.
- The communication cables connected to CEN.A and CEN.B terminal
should be connected to central control of Outside Unit with care for
their polarity (A-A, B-B ).
- Turn the whole system on.
- Set the group and Indoor Unit number with a wired remote control.
- To control several sets of Indoor Units into a group, set the group ID
from 0 to F for this purpose.
Outside Units (External PCB)
Example) Group number setting
1
st
number indicate the group number
2nd number point out indoor unit number
SODU.B SODU.A IDU.B IDU.A CEN.B CEN.A DRY1 DRY2 GND 12V
B(D) A(C) BA
1 F
Group Indoor unit
Group recognizing the 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)
Cool & Heat selector
How to set the mode
Turn on DIP switch No.5 of the master unit PCB
Use ‘▶‘ and ‘◀‘ button to mark “Func” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to mark “Fn1” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to select one from “OFF”,
“op1”, “op2” in the 7 segment, and press ‘●‘ button.
Cool & Heat selection mode is set
Function setting
Switch control Function
Switch(Phase) Switch(Bottom)
OFF op1(mode) op2(mode)
Right Left Not operate Cooling Cooling
Right Right Not operate Heating Heating
Left - Not operate Fan mode Off
CAUTION
• Request the function settings to the installation specialist during
the outside unit installation.
• When the function is not used, set it to OFF.
• If use a function, first install a Cool & Heat selector.
!
Switch (Phase)
Switch (Bottom)
Left side
Right side
DIP-SW01 7 - Segment
SW01C ( : confirm)
SW02C (ඔ : backward)
SW03C (ඖ : forward)
SW04C (
: cancel)
SW01D (reset)
* Functions save in EEPROM will be kept continuously, though the
system power was reset.
To cancel the function you need to set OFF.
Mode Function Option Value Action
Remarks
Content
Display1
Content
Display2
Content Display3
Content Display4
Implement Display5
In-
stal-
lation
Cool & Heat
Selector
oFF
op1~
op2
Selected
the option
- -
Change
the set
value
Blank
Save in
EEPROM
Geothermal
mode set-
ting
on
oFF
Selected
the option
- -
Change
the set
value
Blank
Save in
EEPROM
Sol. Valve
200 V out-
put
on
oFF
Selected
the option
- -
Change
the set
value
Blank
Save in
EEPROM
Variable
water flow
control
on
oFF
Selected
the option
- -
Change
the set
value
Blank
Save in
EEPROM
Outside unit
address
-
-
0~254
set
the
value
Change
the set
value
Blank
Save in
EEPROM
Target
pressure
adjusting
oFF
op1~
op4
Selected
the option
- -
Change
the set
value
Blank
Save in
EEPROM
Use Sump
Heater
on
oFF
Selected
the option
- -
Change
the set
value
Blank
Save in
EEPROM
IDU capacity
adjusting
on
oFF
Selected
the option
- -
Change
the set
value
Blank
Save in
EEPROM
Page 30
30
ENGLISH
CAUTION
• Request the function settings to the installation specialist during
the outside unit installation.
• When the function is not used, set it to OFF.
!
Mode setting
- ON: Set to control the heat source water pipe Solenoid Valve from
the product.
- OFF: Set not to control the heat source water pipe Solenoid Valve
from the product.
Turn on DIP switch No.5 of the master unit PCB
Use ‘▶‘ and ‘◀‘ button to mark “Func” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to mark “Fn3” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to select between “ON” and
“OFF” in the 7 segment, and press ‘●‘ button.
Decide Sol. Valve 220V control
according to the set mode.
CAUTION
• Request the function settings to the installation specialist during
the outside unit installation.
• When the function is not used, set it to OFF.
!
Variable water flow control
It is the function to select when you want to install Variable water flow
control kit and control it from the product.
How to set the mode
Mode setting
- ON: Set to control the variable water flow control valve from the product
- OFF: Set not to control the variable water flow control valve from the
product
Turn on DIP switch No.5 of the master unit PCB
Use ‘▶‘ and ‘◀‘ button to mark “Func” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to mark “Fn4” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to select between “ON” and
“OFF” in the 7 segment, and press ‘●‘ button.
Decide the Variable water flow control mode
according to the set mode.
Sol. Valve 220V output
It is the function to select 220V output when you want solenoid valve
control.
How to set the mode
Geothermal mode setting
If you want to use the product with heat source water of the low temperature such as ground heat, it is the function that enables the use of
ground heat mode.
How to set the mode
Mode setting
- ON: Set to operate in geothermal mode
- OFF: Set to operate in general mode
Turn on DIP switch No.5 of the master unit PCB
Use ‘▶‘ and ‘◀‘ button to mark “Func” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to mark “Fn2” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘ ‘ and ‘ ‘ button to select between “ON” and
“OFF” in the 7 segment, and press ‘●‘ button.
Decide the Geothermal mode according to
the setting mode.
CAUTION
• Request the function settings to the installation specialist during
the outside unit installation.
• When the function is not used, set it to OFF.
• Before changing the mode, make sure to check if the antifreeze
is added to the heat source water with appropriate ratio.
(If it is set to geothermal mode with inappropriate addition of antifreeze or without antifreeze, there is a risk of product damage,
and we will not be responsible for such damage of the product.)
• When you add antifreeze, there may be increase of pressure difference in the heat source water system and product performance degradation.
• If it is in geothermal mode, add antifreeze according to the temperature condition of at least -10°c.
(If the added amount is of -10°C or more, it may cause freeze
and burst of the heat source water.)
!
Anti freeze type
Minimum temperature for anti freezing (°C)
0 -5 -10 -15 -20 -25
Ethylene glycol (%) 0 12 20 30 - -
Propylene glycol (%) 0 17 25 33 - -
Methanol (%) 0 6 12 16 24 30
Page 31
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ENGLISH
Setting the outside unit address
How to set the mode
Turn on DIP switch No.5 of the master unit PCB
Use ‘▶‘ and ‘◀‘ button to mark “Func” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to mark “Fn5” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to select one among “0” ~
“254” in the 7 segment, and press ‘●‘ button.
ODU address is set.
CAUTION
• Request the function settings to the installation specialist during
the outside unit installation.
• If use a function, first install a Central controller.
!
Target pressure adjusting
How to set the mode
Turn on DIP switch No.5 of the master unit PCB
Use ‘▶‘ and ‘◀‘ button to mark “Func” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to mark “Fn7” in the 7 seg-
ment, and press ‘●‘ button.
Select the Option using ‘▶’, ‘◀’ Button :
“op1” ~ “op4” Push the ‘●’ button
Decide target pressure according to the set mode.
Select the Option using ‘▶’, ‘◀’ Button : “HEAT”,
“COOL” Push the ‘●’ button
CAUTION
• Ask an authorized technician to setting a function.
• If do not use a function, set an off-mode.
• Change a power consumption or capacity.
!
Setting
Mode
Purpose
Condensing
temperature
variation
Evaporating
temperature
variation
Heat Cool
op1 Increase capacity Increase capacity -3 °C +2 °C
op2
Decrease power
consumption
Increase capacity -1.5 °C -2 °C
op3
Decrease power
consumption
Decrease power
consumption
+2.5 °C -4 °C
op4
Decrease power
consumption
Decrease power
consumption
+4.5 °C -6 °C
CAUTION
• Request the function settings to the installation specialist during
the outside unit installation.
• When the function is not used, set it to OFF.
• If the temperature of the outside unit installation place is 0°C or
less, we recommend the connection and usage of Sump Heater.
!
Use Sump Heater
It is the function to select when you want to connect and use Sump
Heater.
How to set the mode
Mode setting
- ON: Set to control the Sump Heater from the product
- OFF: Set not to control the Sump Heater from the product
Turn on DIP switch No.5 of the master unit PCB
Use ‘▶‘ and ‘◀‘ button to mark “Func” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to mark “Fn8” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to select between “ON” and
“OFF” in the 7 segment, and press ‘●‘ button.
Decide Sump Heater control according to the set mode.
Mode setting
- ON: Set to control the Low capacity mode
- OFF: Set not to control
IDU capacity adjusting
If the operation of indoor unit is more than 130%, the air flow is operated as low in the all indoor units.
How to set the mode
Turn on DIP switch No.5 of the master unit PCB
Use ‘▶‘ and ‘◀‘ button to mark “Func” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to mark “Fn9” in the 7 seg-
ment, and press ‘●‘ button.
Use ‘▶‘ and ‘◀‘ button to select between “ON” and
“OFF” in the 7 segment, and press ‘●‘ button.
CAUTION
• Ask an authorized technician to setting a function.
!
IDU capacity adjusting mode is set
Page 32
32
ENGLISH
WARNING
• Always check whether the water supply is flowing smoothly
before the test run. (If sufficient amount of water is not flowing, it can burn the product.)
• During the initial test run after installing the product, leaving
the product for more than 3 days or after replacing the compressor, power must be connected 6 hours prior to the operation to heat the compressor heater. (If the product is not
heated sufficiently, it can burn the product.)
!
How to Cope with Abnormal Test Run
Maintenance of plate type heat exchanger
Item
Phenom-
enon
Cause Checkpoint and resolution
Whether
heat
water is
supplied
CH24
When connecting
the flow switch,
heat-sourced
water doesn’t
flow or the
amount of its flow
lacks due to the
checked error related to heatsourced water.
Check whether the heat source water
supply pump is operating.
Check whether the heat source water
supply pipe is clogged.
(Clean strainer, valve locked, valve
issue, air trapped etc.)
Check whether the flow switch is normal condition.
(Flow switch problem, arbitrary control, disconnection etc.)
CH32
Heat water not
supplied or flow
rate is insufficient
Check whether heat source water
supply pump is operating.
Check whether the heat source water
supply pipe is clogged.
(Clean strainer, valve locked, valve
issue, air trapped etc.)
CH34
Heat water not
supplied or flow
rate is insufficient(During Cooling)
Check whether heat source water
supply pump is operating.
Check whether the heat source water
supply pipe is clogged.
(Clean strainer, valve locked, valve
issue, air trapped etc.)
CH180
Heat water not
supplied or flow
rate is insufficient
(During heating)
Check whether heat source water
supply pump is operating.
Check whether the heat source water
supply pipe is clogged.
(Clean strainer, valve locked, valve
issue, air trapped etc.)
h When CH24 or CH180 error occurs during the test operation of the
heater, the inside of the panel heat exchanger may be partially
frozen and therefore, be sure to get rid of its cause and then, re-operate the device.
(The root cause of partial freezing: The lack of flow of heat-sourced
water, suspension of water, lack of cooling medium, infiltration of
foreign substance inside of panel heat exchanger )
TEST RUN
Precaution before test run
Water supply system test run
Before executing the test run for the product, you must first test the
heat source water system.
The test run for the product must be executed after checking the flow
rate and temperature of the heat source water supplied.
Equipment design
Execute the
product test run
Water pipe system
installation
Water supply pipe
and product connection
Water supply
system test run
Judging whether there
is any problem with
the water supply
Design the system including cooling tower, boiler, pump etc.
- Check the equipment capacity (Water volume, temperature
control range).
Connect the water pipe to the inlet/outlet of the product so
that the water can be supplied to the product.
Execute water supply system test run
- The product does not operate but the pump and water
supply equipment will operate to flow the Heat source
water to the heat exchanger on the product side.
- Flow the water to all water piping system to clean any alien
particles inside the pipes and execute an air purge to
remove an air within the pipes to make the water supply
smoother.
- Clean all the strainers of water pipe including around
outside units.
Execute the test of water supply system without operating
the product.
- Check whether outside unit inlet/outlet flow rate complies
to the product specification. Standard Water volume is
96LPM based on 10HP and 192LPM based on 20HP.
- Check the water supply temperature. whether is OK
After checking the normal condition of the water supply,
execute the test run of the product.
To prevent the freezing of the heat exchanger when the
refrigerant is discharged with the water supply blocked,
discharge the refrigerant after draining out around the
outside unit.
Install the water pipe
1
Check whether the air is completely removed and the water supply is flowing smoothly.
2
Check whether there is any refrigerant leakage of any disconnected
or loose communication or power wire, or use the electric wiring diagram to check the wiring connection condition. Check whether the
power and communication wire are connected.
3
Check whether the power cable R, S, T and N are correctly connected. Check the insulation resistance with the DB mega tester
device (DC 500V) between the power terminal block and grounding, and check whether it is 2.0MΩ or above when measured.
If the resistance is 2.0MΩ or less, do not operate the product.
Precaution)
- Never check the insulation resistance for the terminal control
board. (The control board can be damaged.)
-
If you leave the system turned off right after the installation or for a
long period of time, the refrigerant gets accumulated within the
compressor and the insulation resistance reduces to less than 2
MΩ. When the insulation resistance is 2 MΩ or less, turn on the
power and let the electricity be supplied to the crank case heater of
the compressor and let the refrigerant including the oil inside the
compressor to evaporate. Then the insulation resistance value will
increase to more than 2.0 MΩ.
4 Check whether the liquid and gas pipes are open.
5
Precaution when blocking the water cooling type Multi V main power
- While using the product (Air conditioning season/Heating season), always connect the main power of the outside unit.
-
During the test run operation after installing the product or during the operation after blocking the outside unit main power (Power outage etc.), you
must always connect the power 6 hours prior to heating the crank case
heater. If the crank case is not preheated for more than 6 hours with the
electric heater, it can cause a burn on the compressor.
(Heating the bottom part of the compressor with the crank case heater is
to evaporate the refrigerant included in the oil inside the compressor.)
As the scales are created in the panel heat exchanger, its efficiency
may decrease or damage may occur due to winter-sowing due to the
decrease in its flow.
Due to this reason, regular maintenance is necessary so that the scales
shouldn't be created.
1 Before the season of use, check below points.(Once a year)
1) Inspection on water quality to check if this is within the standard
condition.
2) Clean the strainer.
3) Check if the flow is appropriate.
4) Check if the operation environment is appropriate.(Pressure,
flow, output temperature)
2 Below procedure should be abided by in order to clean the panel
heat exchanger. (Once every 5 years)
1) Check if the service port is equipped with the water pipe in order
to clean the chemical solution.
5% diluted formic acid, citric acid, oxalic acid, acetate acid, phosphoric acid and etc. are appropriate for the chemical solution for
wiping out the scales.(Hydrochloric acid, sulphuric acid, nitric acid
and etc. shouldn't be used due to its corrosion.)
Page 33
33
ENGLISH
Daily check/management
1
Water quality control
The plate type heat exchanger is not structured to be disassem-
bled, cleaned or replaced with parts. To prevent corrosion or scaling
on the plate type heat exchanger, special care must be taken to
control the water quality. Water quality must satisfy the minimum
criteria of the reference water quality items. When anti-corrosion
agent or corrosion inhibitor is added, the substance must not have
any corrosive effect on stainless steel and copper. Even if the circulating water is not contaminated by the external air, it is recommended to empty the water flowing in the pipe and to resupply the
water.
2
Flow rate control
If the flow rate is insufficient, it can cause freezing on the plate type
heat exchanger. Check whether the strainer is clogged or whether
the pipe is filled with air and then check the temperature and pressure difference of the inlet and outlet pipe to check whether the
flow rate is insufficient. If the temperature and pressure difference
is above the appropriate level, it means that the flow rate is reduced. In this case, the operation must immediately be stopped
and re-operated when the root cause is resolved. (*If air is trapped
in the pipe, the air must be purged. Air inside the water pipe interferes with the circulation of the heat water supply and can cause insufficient flow rate or freezing.)
3
Brine density management
When using the brine (Anti-freeze) in the heat water supply, desig-
nated type and density must be used. Calcium chloride brine can
cause corrosion on the plate type heat exchanger and must not be
used. If the anti-freeze liquid is left as is, it absorbs the moisture
from the air to cause a drop in the density, leading to freezing of
plate type heat exchanger. Therefore minimize the contact surface
with the atmosphere and periodically measure the density of the
brine to supplement the brine as needed to maintain the density.
Maintenance/Repair checklist
123456789101112131415
●●●●●●●●●●●●●●●
●●●
●●●●●●●●●●●●●●●
●●●●●●●●●●●●●●●
●●
●●●●●●●●●●●●●●●
Period (Year)
Checkpoint
Product operating condition
Heat exchanger cleaning (Wash)
Strainer cleaning
Water quality check
Refrigerant leakage check
Indoor unit filter cleaning
CAUTION
• The above checklist is set based on the minimum period and
more frequent checking can be required depending on the operating condition/water quality condition.
• When cleaning the heat exchanger, make sure to take parts out
or lock the value so that chemical detergent does not penetrate
into the pressure gauge etc.
• When cleaning the heat exchanger, check the connecting part of
the water pipes prior to cleaning so that the chemical detergent
does not leak.
• After sufficiently mixing the chemical detergent with water, start
cleaning.
• Cleaning the heat exchanger is easier at the initial stage and becomes difficult after the scaling has accumulated.
• In areas where the water quality is poor, cleaning is required periodically.
Because chemical detergent has strong acidity, it must be
washed off thoroughly with water.
• To check whether it is cleaned well inside, remove the hose and
check the inside.
• Purge the air to remove any air inside the water pipe.
• After checking, always check whether the heat water supply is
flowing normally flowing before operating the product.
!
2) Be sure to check if the gate valve of inflow/outflow pipe and the
valve for outflow pipe are properly closed when cleaning.
3) Connect the water pipe for cleaning with the chemical solvent
through the service plug of the pipe and fill up the panel heat exchanger with 50°C~60°C of cleaning solvent and circulate it with
the pump for 2~5 hours. The circulation time may depend on
the temperature of the cleaning solvent or the creation of the
scales. Therefore, observe change in the color of the chemical
solvent to set the circulation time for removing the scales.
4) After the circulation of the solvent, extract the solvent inside of
the panel heat exchanger and fill up 1~2% of NaOH or NaHCO3
and then, circulate it for 15~20 minutes to neutralize the heat exchanger.
5) Once the neutralization is completed, clean the inside of the
panel heat exchanger with clean water.
Measure the water Ph to check if the chemical solvent is properly removed or not.
6) When using a different kind of chemical solvent in the market, be
sure to check if there is any corrosive action to stainless or copper in advance or not.
7) For details on the cleaning chemical solvent, be sure to consult
the specialists of the related corporation.
3 After cleaning, operate the device to see if it works properly once
again.
t
Gate valve(locked)
Service plug
Strainer
Outflow water
valve(locked)
Gate valve(locked)
Water-cooling
type multi V
Pump
[Cleaning the panel heat exchanger]
Hose
Screening ne
Page 34
34
ENGLISH
Self-Diagnosis Function
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 outside 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,3rd LED of 7-segment indicates error number, 4th LED indicates unit number.(* = 1: Master, 2: Slave 1, 3: Slave 2, 4: Slave 3)
Ex)
* Refer to the DX-Venitilation manual for DX-Venitilation error code.
Display Title Cause of Error
Indoor unit related error
0 1 -
0 2 -
0 3 -
0 4 -
0 5 -
0 6 -
0 9 -
1 0 -
1 7 -
Outside unit related error
2 1 *
2 2 *
2 3 *
2 4 *
2 5 *
26*
28*
29*
32*
34*
Air temperature sensor of indoor unit
Inlet pipe temperature sensor of indoor unit
Communication error : wired remote controller ÷ indoor unit
Drain pump
Communication error : outside unit ÷ indoor unit
Outlet pipe temperature sensor of indoor unit
Indoor EEPROM Error
Poor fan motor operation
Inlet Air temperature sensor of FAU
Master outside unit inverter compressor IGBT Fault
Inverter Board Input Over Current(RMS) of Master
outside Unit
Master outside unit inverter compressor DC link
under-voltage
Master outside unit high pressure switch
Master outside unit input voltage overvoltage/under-voltage
Master outside unit inverter compressor operation
failure error
Master outside unit inverter DC link over-voltage
error
Master outside unit inverter compressor overcurrent
Master outside unit inverter compressordischarge
temperature over-rise
Master outside unit high pressure over-rise
Air temperature sensor of indoor unit is open or short
Inlet pipe temperature sensor of indoor unit is open or short
Failing to receive wired remote controller signal in indoor unit PCB
Malfunction of drain pump
Failing to receive outside unit signal in indoor unit PCB
Outlet pipe temperature sensor of indoor unit is open or short
In case when the serial number marked on EEPROM of Indoor unit
is 0 or FFFFFF
Disconnecting the fan motor connector/Failure of indoor fan motor
lock
Air temperature sensor of indoor unit is open or short
Master outside unit inverter compressor drive IPM error
Master Outside Unit Inverter Board Input Current excess (RMS)
DC voltage is not charged after master outside unit operating relay
is turned on
Compressor maintenance by master outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of master outside unit
Master outside unit input voltage over-voltage or under-voltage
Initial operation failure due to master outside unit inverter compressor error
Compressor turned Off due to master outside unit inverter DC voltage over-charge
Master outside unit inverter compressor error or operating component (IGBT) error operation
Compressor turned off due to master outside unit inverter compressor discharge temperature over-rise Flow rate insufficiency or flow
switch trouble of master outside unit
Compressor turned off due to master outside unit high pressure
over-rise Flow rate insufficiency or flow switch trouble of master
outside unit
Error No.
Repeat
Error No. of Unit
Error No. of Compressor
Page 35
35
ENGLISH
Display Title Cause of Error
Outside unit related error
3 5 *
3 6 *
3 9 *
4 0 *
4 1 *
4 2 *
4 3 *
4 4 *
4 6 *
4 9 *
5 0 *
5 1 *
5 2 *
5 3 *
5 7 *
5 9 *
6 0 *
6 2 *
6 5 *
7 1 *
8 6 *
88*
Master outside unit low pressure over-drop.
Master Outside Unit Low Compression Ratio Limited
Master Outside unit Communication error between
Master outside unit PFC and inverter board
Master outside unit inverter compressor CT sensor
error
Master outside unit inverter compressor discharge
temperature sensor error
Master Outside Unit Low Pressure Sensor Fault
Master Outside Unit High Pressure Sensor Fault
Master Outside unit air temperature sensor error
Master outside unit suction temperature sensor
error
Master outside unit IGBT temperature sensor error
Master outside unit 3 phase power missing
Over-capacity (Indoor unit capacity sum is excessive) connection
Communication error: inverter PCB ’ Main PCB
Communication error: indoor unit ’ Main PCB of
Outside Unit
Communication error: Main PCB ’ inverter PCB
Wrong setting between master and slave outside
unit
Master outside unit inverter PCB EEPROM error
Master outside unit inverter IGBT over-rise error
Master outside unit inverter IGBT temperature sensor error
PFC CT Sensor Error of Master Outside Unit
Master outside unit master PCB EEPROM error
PFC PCB EEPROM error
Compressor turned off due to master outside unit low pressure
overdrop.
Master Outside Unit stayed under low Compression limit for 3 minutes
Master Outside unit inverter compressor current detection (CT) sensor disconnection or short circuit
Master outside unit inverter compressor current detection (CT) sensor disconnection or short circuit
Master outside unit inverter compressor discharge temperature
sensor disconnection or short circuit
Master Outside Unit Low Pressure Sensor open or short
Master Outside Unit High Pressure Sensor open or short
Master Outside unit air temperature sensor disconnection or short
circuit
Master outside unit suction temperature sensor disconnection or
short circuit
Master out side unit IGBT temperature sensor disconnection or
short circuit
Master outside unit power line phase missing
Excessive connection of indoor unit connection display value (Different from outside unit)
When the inverter controller signal is not received from the master
outside unit inverter controller
When the indoor unit control signal is not received from the master
Outside unit controller
Failing to receive inverter contoroller signal at Master Outside Unit
controller
When geothermal mode setting is different(Fn 2 setting)
Master outside unit inverter PCB EEPROM ACCESS error
Master outside unit inverter IGBT when the temperature rises
above 110 °C
Master outside unit inverter IGBT temperature sensor disconnection or short circuit
Master Outside Unit PFC CT Sensor open or short
Communication error between master outside unit master MICOM
andEEPROM or EEPROM missing
Communication error between master outside unit master PFC and
EEPROM or EEPROM missing
Page 36
36
ENGLISH
Display Title Cause of Error
Outside unit related error
1 0 4*
1 1 3*
1 1 5*
116*
145*
151*
180*
181*
182*
Communication Error Between Master Outside Unit
and Other Outside Unit
Master Outside Unit Liquid pipe Temperature Sensor Error
Master Outside Unit Subcooling Outlet Temperature
Sensor Error
Master Outside Unit Oil Level Sensor Error
Master outside unit Main Board - External Board
communication Error
Failure of operation mode conversion at Master Outside Unit
Plate type heat exchanger freeze prevention
Water temperature sensor error
Communication error between MICOMs of external
pcb
Failing to receive Slave Unit signal at main PCB of Master Outside
Unit
Liquid pipe temperature sensor of Master Outside Unit is open or
short
Master Outside Unit Subcooling Outlet Temperature Sensor open
or short
Oil Level Sensor of Master Outside Unit is open or short
Master outside unit Main Board - External Board communication
Error
Failure of operation mode conversion at Master Outside Unit
Plate type heat exchanger freeze prevention error
Water temperature sensor open/short
Communication error between main MICOM and sub MICOM of
external pcb
Checking procedure of limiting concentration
Check limiting concentration along following steps and take appropriate measure depending on the situation.
Calculate amount of all the replenished refrigerant (kg) per each refrigerant system.
Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the
smaller room.
- With partition and with opening
which serve as passage of air to
adjoining room
- Without partition
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/m
3
(Freon gas weight per unit
air volume) for facilitating calculation.
Limiting concentration: 0.44kg/m3(R410A)
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 replenished
refrigerant per one outside
unit system
Amount of replenished
refrigerant at factory shipment
Amount of additionally
replenished refrigerant
depending on piping
length or piping
diameter at customer
Outside unit
Indoor unit
Outside 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)
Outside unit
(No.1 system)
Flow of
refrigerant
Indoor unit
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
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.
Limiting concentration
CAUTION FOR REFRIGERANT LEAK
- With partition and without opening which serve as passage of air to
adjoining room
Calculate refrigerant concentration
Total amount of replenishedrefrigerant
in refrigerant facility (kg)
Capacity of smallest room
whereindoor unit is installed (m3)
- 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.
= Refrigerant concentration(kg/m3)
(R410A)
Outside unit
Indoor unit
Smallest
room
Page 37
37
ENGLISH
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 outside unit refrigerant qty.
[Open type cooling tower + Middle heat exchanger]
Heat exchanger is installed between the cooling tower and outside
unit system piping, and the temperature difference between 1st side
and 2nd side is maintained constantly.
Countermeasure 2
Gas leak alarm
Mechanical ventilator
Countermeasure 1
Opening effective to ventilation
Indoor unit
Pay a special attention to the place, such as a basement, etc.
where refrigerant can stay, since refrigerant is heavier than air.
WATER SOLENOID VALVE CONTROL
COOLING TOWER APPLIED
METHOD
Central Control(Use DDC Port)
Individual Control(Use 220V Output Port)
Water
In
※ BMS : Building Management System
Water
Out
Solenoid
Valve
CN_18
(220 V Out)
CN_22
(to DDC)
PI 485
DDC
BMS
1(L) 2(N) 3(L) 4(N)
Main PCB
Water
In
Water
Out
Solenoid
Valve
※ Refer to setting the function and turn on the power
When you individual control for water solenoid valve
control.
CN_18
(220 V Out)
CN_22
(to DDC)
1(L) 2(N) 3(L) 4(N)
Main PCB
Open type
cooling tower
1
st
side
2
nd
side
Heat exchange
Closed type
cooling tower
CAUTION
When the open type cooling tower is used and the water supply is
directly connected to the 2nd heat exchanger, product damage by
alien particle cannot be repaired for free.
- Always use the 2nd heat exchanger.
!
Page 38
38
ENGLISH
INSTALLATION GUIDE FOR HARMONICS AND FLICKER
The below Installation guide is limited applicable only for model
Model : ARWN140LAS4, ARWN120LAS4, ARWN100LAS4,
ARWN080LAS4
Installation Guide for Harmonics (EN 61000-3-2 & EN 61000-3-12)
Installation Guide for Flicker (EN 61000-3-3 & EN 61000-3-11)
This equipment complies with IEC (EN) 61000-3-2.
This equipment complies with IEC (EN) 61000-3-12 in harmonic
currents emission limits corresponding Rsce =33.
This equipment complies with IEC (EN) 61000-3-12 provided that
the short-circuit power Ssc is greater than or equal to 4671 kVA at
the interface point between the user’s supply and the public system. It is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply with a
short-circuit power Ssc greater than or equal to 4671 kVA.”
This equipment complies with IEC (EN) 61000-3-3.
This equipment complies with reference impedance for IEC (EN)
61000-3-11.
This device is intended for the connection to a power supply system with a maximum permissible system impedance
Z
MAX
of Ω at the interface point (power service box) of the
user’s supply. The user has to ensure that this device is connected
only to a power supply system which fulfills the requirement
above. If necessary, the user can ask the public power supply company for the system impedance at the interface point.
The below Installation guide is limited applicable only for model
Model : ARWN200LAS4, ARWN180LAS4, ARWN160LAS4
Installation Guide for Harmonics (EN 61000-3-2 & EN 61000-3-12)
Installation Guide for Flicker (EN 61000-3-3 & EN 61000-3-11)
This equipment complies with IEC (EN) 61000-3-2.
This equipment complies with IEC (EN) 61000-3-12 in harmonic
currents emission limits corresponding Rsce =33.
This equipment complies with IEC (EN) 61000-3-12 provided that
the short-circuit power Ssc is greater than or equal to 5409 kVA at
the interface point between the user’s supply and the public system. It is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply with a
short-circuit power Ssc greater than or equal to 5409 kVA.”
This equipment complies with IEC (EN) 61000-3-3.
This equipment complies with reference impedance for IEC (EN)
61000-3-11.
This device is intended for the connection to a power supply system with a maximum permissible system impedance
Z
MAX
of Ω at the interface point (power service box) of the
user’s supply. The user has to ensure that this device is connected
only to a power supply system which fulfills the requirement
above. If necessary, the user can ask the public power supply company for the system impedance at the interface point.
Model Designation
• Product Name : Air conditioner
• Model Name :
• Additional information : Serial number is refer to the bar code on the
product.
Product Sales Name Model Factory Name
ARWx***LAy4 series
x = N, B (Heat pump), V (Cooling only)
y = S (Basic function),
E (Additional function related to performance)
*** = Numeric; (Cooling capacity)
Product information
Airborne Noise Emission
The sound pressure of this product is below 70dB.
** The noise level can vary depending on the site.
The figures quoted are emission level and are not necessarily safe
working levels.
Whilst there is a correlation between the emission and exposure levels, this cannot be used reliably to determine whether or not further
precautions are required.
Factor that influence the actual level of exposure of the workforce include the characteristics of the work room and the other sources of
noise, i.e. the number of equipment and other adjacent processes and
the length of time for which an operator exposed to the noise. Also,
the permissible exposure level can vary from country to country.
This information, however, will enable the user of the equipment to
make a better evaluation of the hazard and risk.
Page 39
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