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.
Caution For Refrigerant Leak......................................................................................62
Water Solenoid Valve Control .....................................................................................64
MFL67705803 2018. 9. 17. 오오 12:58 Page 2
Page 3
Installation Manual 3
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
n Meanings of symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
WARNING
n Installation
Have all electric work done by a licensed
electrician according to "Electric Facility Engineering Standard" and "Interior Wire Regulations" and the instructions given in this
manual and always use a special circuit.
• If the power source capacity is inadequate or electric work
is performed improperly, electric shock or fire may result.
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 install 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, explosion, or injury.
Do not install, remove, or re-install the unit
by yourself (customer).
• There is risk of fire, electric shock, explosion, or injury.
Do not store or use flammable gas or
combustibles near the air conditioner.
• There is risk of fire or failure of product.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Do not install the unit at the outdoor.
• 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.
ENGLISH
MFL67705803 2018. 9. 17. 오오 12:58 Page 3
Page 4
4Outside Unit
Safety Precautions
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 securely, 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 appropriate measures to prevent the safety limit from being exceeded. Should the refrigerant leak and cause the safety limit to be exceeded, harzards due to lack of oxygen in the room could result.
n Operation
Do not damage or use an unspecified power
cable.
• 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 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.
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.
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.
MFL67705803 2018. 9. 17. 오오 12:58 Page 4
Page 5
Installation Manual 5
Safety Precautions
CAUTION
n Installation
Always check for gas (refrigerant) leakage
after installation or repair of product.
• Low refrigerant levels may cause failure of
product.
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.
Keep the unit away from children. The heat
exchanger is very sharp.
• It can cause the injury, such as cutting the finger. Also the
damaged fin may result in degradation of capacity.
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.
Install the outdoor units at a place well ventilated.
• Location where is not well ventilated may cause low performance and damage of PCB by heat.
n Operation
Do not use the air conditioner in special
environments.
• Oil, steam, sulfuric smoke, etc. can significantly reduce the
performance of the air conditioner or damage its parts.
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 generate 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.
ENGLISH
MFL67705803 2018. 9. 17. 오오 12:58 Page 5
Page 6
6Outside Unit
Safety Precautions
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.
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.
Do not touch any of the refrigerant piping
during and after operation.
• It can cause a burn or frostbite.
Do not operate the air conditioner with the
panels or guards removed.
• Rotating, hot, or high-voltage parts can cause injuries.
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.
ENVIRONMENTAL INFORMATION
MFL67705803 2018. 9. 17. 오오 12:58 Page 6
Page 7
Installation Process
Installation Manual 7
Installation Process
• The above list indicates the order in which the individual work operations are normally carried out but this order may be
varied where local conditions warrants such change.
• The wall thickness of the piping should comply with the relevant local and national regulations for the designed pressure
3.8MPa.
• 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
ENGLISH
MFL67705803 2018. 9. 17. 오오 12:58 Page 7
Determination of division work
Preparation of contract drawings
Sleeve and insert work
Installation of indoor unit
Refrigerant piping work
Drain pipe work
Duct work
Heat insulation work
Electrical work
(connection circuits and drive circuits)
Airtight test
Vacuum drying
Indicate clearly who is to be responsible for switch settings
Make relationship between outside, indoor, remote controller, and option connections clear.
(Prepare control circuit diagram)
Take account of gradient
of drain piping
Check model name to make
sure the fitting is made correctly
Special attention to dryness,
cleanness and tightness
Adjust to downward gradient
Make sure airflow is sufficient
Make sure no gaps are left where
the insulating materials are joined
Multiple core cable must not be used.
(suitable cable should be selected)
In the final check for 24hours at 3.8 MPa(38.7 kgf/cm
The vacuum pump used must have a capacity of reaching at least 5 torr, more than 1 hour
Outside unit foundation work
Installation of outside unit
2
) there must be no drop in pressure.
The foundation must be level even
Avoid short circuits and ensure
sufficient space is allowed for service
Additional charge of refrigerant
Fit facing panels
Automatic addressing of indoor unit
Test run adjustment
Transfer to customer with explanation
Recharge correctly as calculated in this manual. and record the amount of added refrigerant
Make sure there are no gaps left between the facing materials used on the ceiling
Refer to automatic addressing flowchart
Preheat the crank case with the electrical heater for more than 6 hours.
Run each indoor unit in turn to make sure the pipe work has been fitted correctly
Explain the use of the system as clearly as possible to your customer and make sure all relevant
documentation is in order
Page 8
Outside units Information
8Outside Unit
Outside units Information
Power Supply: Outside Unit (3Ø, 380~415V, 50/60Hz)
n Cooling Only
• Ratio of the running Indoor Units to the Outside: Within 10 ~ 100%
• A combination operation over 100% cause to reduce each indoor unit capacity.
n Combination Ration(50~200%)
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.
1) If the operation of indoor unit is more than 130%, low airflow operation is recommended in all
the indoor units.
2) If the operation of indoor unit is more than 130%, additional refrigerant is needed according to
the Aheadquarter guidance.
3) Over 130%, capacity is same as capacity of 130%, Same remark is valid for power input.
h If it will be installed 20HP and 30HP, please contact the HQ.
Outside Number Connection Capacity
Single outside units 200%
Double outside units 160%
Triple outside units 130%
System CapacityHP102030
Model Name
Combination UnitARWV100DAL4ARWV200DAL4ARWV300DAL4
Independent Unit
ARWV100DAL4ARWV100DAL4ARWV100DAL4
ARWV100DAL4ARWV100DAL4
ARWV100DAL4
Product Refrigerant Chargekg2.02.0+2.02.0+2.0+2.0
Maximum Connection No. of Indoor16(25)32(44)49(60)
Environment-friendly Alternative Refrigerant R410A
Installation Manual 9
ENGLISH
Select the Best Location
Precaution when selecting the installation location
• Select space for installation 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
• 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.)
• Install the outdoor units at a place well ventilated.
• The refrigerant R410A has the property of higher operating pressure in comparison with R22.
Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this characteristic should be also considered during the installation.
R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is
0. These days the developed countries have approved it as the environment-friendly refrigerant and encouraged to use it widely to prevent environment pollution.
1. Do not install Multi V water outside. Always install indoor like machine room.
2. 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.
3. Location where is not well ventilated may cause low performance and damage of PCB by heat.
• 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
CAUTION
Environment-friendly Alternative Refrigerant R410A
MFL67705803 2018. 9. 17. 오오 12:58 Page 9
Page 10
10Outside Unit
Installation space
Installation space
Individual Installation
Required the minimum space as shown below for installation and check.
If the space is not fit on this drawing, consult with LG.
Collective / Continuous Installation
: Service area
Service area
(Front)
Space required for collective installation and continuous installation as shown below considering passage for air and
people.
: Service area
* In case of the water pipe passing side product, please make sufficient service place to avoid occurring between
water pipe and product side.
MFL67705803 2018. 9. 17. 오오 12:58 Page 10
Product
Water pipe
installation
space
300
(Outside unit)
Service area
Service area
(Front)
(Front)
350
755
100
300
(unit : mm)
800997100
600500
H-Beam Support
<Front View><Top View>
(Unit : mm)
300
Product
(Outside unit)
Service area
(Front)
350
755
<Top view>
200
300
Product
(Outside unit)
Service area
(Front)
350
755
200
Product
(Outside unit)
Service area
(Front)
350
755
600500
100
Page 11
Installation Manual 11
Water control
Water control
Water control
• 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.
• It can use to both the open cooling type and closed cooling type tower.
Diameter (mm)Velocity range (m/s)
< 500.6 ~ 1.2
50 ~ 1001.2 ~ 2.1
100 <2.1 ~ 2.7
ENGLISH
MFL67705803 2018. 9. 17. 오오 12:58 Page 11
Page 12
12Outside Unit
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
[Reference]
(1) The "O" mark for corrosion and scale means that there is possibility of occurrence.
(2) When the water temperature is 40°C or above or when uncoated iron is exposed to the water, it can result in corro-
sion. Therefore adding anti-corrosion agent or removing the air can be very effective.
(3) In case of using the closed type cooling tower, the cooling water and supplementing water must satisfy the water qual-
ity criteria of closed type system in the table.
(4) Supplementing water and supplied water must be supplied with tap water, industrial water and underground water ex-
cluding filtered water, neutral water, soft water etc.
(5) 15 items in the table are general causes of corrosion and scale.
Items
pH(25C)
Conductivity[25C](mS/m)
Chlorine ion(mg CI-/l)
Sulfuric acid ion(mg SO
2
/l)
Acid demand[pH 4.8] (mg SiO2/l)
Total hardness(mg SiO2/l)
Ca hardness(mg CaCO3/l)
Ion silica(mg SiO2/l)
Fe(mg Fe/l)
Copper(mg Cu/l)
Sulfuric acid ion(mg S2/l)
Ammonium ion(mg NH4/l)
Residual chlorine(mg Cl/l)
Free carbon dioxide(mg CO2/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 waterSupplemented waterCorrosionScale
4
+
Water control
MFL67705803 2018. 9. 17. 오오 12:58 Page 12
Page 13
Installation Manual 13
Lifting method
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
• 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.
• When carrying with the forklift, be careful not to drop the product.
ENGLISH
CAUTION
MFL67705803 2018. 9. 17. 오오 12:58 Page 13
Sub line
A
40° or less
B
Rope supporter
WARNING
Page 14
14Outside Unit
Installation
Location of anchor bolt
62 mm
632
496
632 mm
496 mm
756 mm
465 mm
The location of
anchor bolt
62 mm
• Be sure to install unit in a place strong enough to withstand its weight.
Any lack of strength may cause unit to fall down, resulting in a personal injury.
• Have installation work in order to protect against a strong wind and earthquake. Any installation
deficiency may cause unit to fall down, resulting in a personal injury.
• Especially take care for support strength of the floor surface, water drain processing (processing of
water flown out from the outside unit during operation) and paths of the pipe and wiring when making a base support.
Installation
CAUTION
MFL67705803 2018. 9. 17. 오오 12:58 Page 14
Page 15
Installation Manual 15
Installation
Preparation of Piping
1) Cut the pipes and the cable.
• Use the accessory piping kit or the pipes purchased locally.
• Measure the distance between the indoor and the out-
side unit.
• Cut the pipes a little longer than measured distance.
• Cut the cable 1.5m longer than the pipe length.
2) Burrs removal
• Completely remove all burrs from the cut cross section
of pipe/tube.
• Put the end of the copper tube/pipe to downward direc-
tion as you remove burrs in order to avoid to let burrs
drop in the tubing.
3) 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.
4) 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.
Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure.
• 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.
MFL67705803 2018. 9. 17. 오오 12:58 Page 16
±2
90°
45°
±2
A
R=0.4~0.8
Page 17
Installation Manual 17
Installation
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 environment.
3. Standard refrigerant pipe EPDM heat insulation material thickness
HEAT INSULATION
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 temperature/humidity difference due to high ceiling
- Church, auditorium, theater, lobby etc.
2. When the location is air conditioned but the internal temperature/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 indoor 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.
[Unit:mm]
ENGLISH
MFL67705803 2018. 9. 17. 오오 12:58 Page 17
Indoor unit
Liquid
pipe
Classification
Ø6.35
Ø9.52
Above Ø12.7
Air conditioned location
Note1)
General location
Above t9
Above t13
Note2)
Special location
Above t9
Above t13
Non-air conditioned location
Note3)
General location
Above t9
Above t13
Ø9.52
Ø12.7
Gas
pipe
Ø15.88
Ø19.05
Ø22.22
Ø25.4
Above t13
Above t19
Above t19
Ø28.58
Ø31.75
Ø34.9
Ø38.1
Above t19
Above t25
Above t25
Ø44.45
Fastening band
(accessory)
Refrigerant piping
Thermal insulator
(accessory)
Note4)
Negative condition
Above t9
Above t13
Above t25
Page 18
Installation
18Outside Unit
4. Connecting branch pipe between outside units
* Install the branch pipe between outside units so that the outlet pipe is parallel to the surface.
5. Two or more units combination only
• The check valve must be installed on each of outdoor
unit, when you install two or more outdoor units combination.
• The Check valve must be installed vertically
• The check valve must be kept in low-temperature condition during welding work.
2 Unit
ABC
3 Unit
ARCNN21
ARCNN31
Outside unitsModel
Gas PipeLiquid Pipe
130(5-1/8)
416(16-3/8)
408(16-1/16)
I.D.28.58(1-1/8)I.D.28.58(1-1/8)
I.D.34.9(1-3/8)
I.D.41.3(1-5/8)
I.D.38.1(1-1/2)
O.D.34.9(1-3/8)
I.D.31.8(1-1/4)
I.D.22.2(7/8)
I.D.28.58(1-1/8)
I.D.15.88(5/8)I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.19.05(3/4)
I.D.12.7(1/2)
I.D.12.7(1/2)
I.D.9.52(3/8)
I.D.9.52(3/8)
331(13-1/32)
70(2-3/4)
314(12-3/8)
I.D.22.2(7/8)
O.D.19.05(3/4)
406(15-31/32)
111(4-3/8)
111(4-3/8)
83(3-9/32)
83(3-9/32)
125(4-29/32)
353(13-29/32)
I.D.34.9(1-3/8)
I.D.41.3(1-5/8)
I.D38.1(1-1/2)
I.D.41.3(1-5/8)
O.D.34.9(1-3/8)
I.D.28.58(1-1/8)
I.D34.9(1-3/8)
I.D.15.88(5/8)
I.D.19.05(3/4)
I.D.19.05(3/4)
I.D.12.7(1/2)
I.D.22.2(7/8)
334(13-5/32)
281(11-1/16)
O.D. 19.05(3/4)
I.D. 15.88(5/8)
O.D. 12.7(1/2)
I.D. 12.7(1/2)
I.D. 6.35(1/4)
X2
110(4-11/32)
110(4-11/32)
I.D12.7(1/2)
110(4-11/32)
O.D15.88(5/8)
120(4-23/32)
I.D19.05(3/4)
I.D22.2(7/8)
O.D28.58(1-1/8)
120(4-23/32)
I.D19.05(3/4)
I.D22.2(7/8)
O.D28.58(1-1/8)
I.D9.52(3/8)
A
(Master)
A
(Master)
(Slave1)
B
(Slave1)
(Slave2)
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.
• When combination installed, it should be installed with the check valve on each unit. Otherwise it may cause low
performance.
[Unit:mm]
CAUTION
Wet towel
MFL67705803 2018. 9. 17. 오오 12:58 Page 18
Direction of Ref. Flow
Page 19
Installation Manual 19
ENGLISH
After completing work, securely tighten both service ports and caps so that gas does not leak.
Refrigerant piping installation
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.
Cautions in pipe connection/valve operation
Liquid pipe
Gas pipe
h Remove the front panel before pipe connection
h Must check the pipe (gas pipe, liquid pipe) before pipe con-
nection
Refrigerant piping installation
WARNING
WARNING
MFL67705803 2018. 9. 17. 오오 12:58 Page 19
Do not cutting.
Open status when both the pipe and
the valve are in a straight line.
CLOSEOPEN
Page 20
20Outside Unit
Refrigerant piping installation
1) 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.
• Always install a strainer (20 Mesh 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.
2) 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.)
Flow control valve
Air vent
Presssure/Temperature gage
Service Port
Strainer
On/Off Valve
Drain line
Flow control valve
BALL V/V(TYP.)
FLEXIBLE JOINT
SUS(TYP.)(7)
Do not directly connect the drain outlet to the water pipe outlet.
(It can cause problems to the product.)
To protect the water cooling type product, you must install a strainer with 20 Mesh or more on the heat water supply pipe.
If not installed, it can result in damage of heat exchanger by the following situation.
If you do not use a strainer with 50 mesh or more, alien particles can partially block the water paths.
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
• 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.)
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
1 inch or
3/4 inch
socket
Cover
Micro-switch
Adjustment screw
Vibration plate
Bellows
Pad
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.
• 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
MFL67705803 2018. 9. 17. 오오 12:58 Page 22
Picture 1Picture 2
Picture 3
Picture 4
Page 23
Installation Manual 23
ENGLISH
Refrigerant piping system
Y branch method
Refrigerant piping system
Slave2
Slave1
Master
H
G
IDU
direction
l 40m (90 m : Conditional application)
L150m (200 m : Conditional application)
h 40m
10m or
less
ODU Capacity
Master ≥ Slave1 ≥ Slave2
l 40m (90 m : Conditional application)
h 40m
H 50m
L150m (200 m : Conditional application)
IDU
direction
Series outside unit system
Example : 5 Indoor Units connected
Ⓐ : Outside Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header branch
Ⓕ : Pinch off
Ⓖ : Outside branch(1st)
Ⓗ : Outside branch(2nd)
Single outside unit system
Example : 5 Indoor Units connected
Ⓐ : Outside Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header branch
Ⓕ : Pinch off
* If it is conditionally installed, refer to (table 1).
* If it is conditionally installed, refer to (table 1).
MFL67705803 2018. 9. 17. 오오 12:58 Page 23
Page 24
Refrigerant piping system
24Outside Unit
Header Method
Single outside unit system
Example : 6 Indoor Units connected
Ⓐ : Outside Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header branch
Ⓕ : Pinch off
Series outside unit system
Example : 6 Indoor Units connected
Ⓐ : Outside Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header branch
Ⓕ : Pinch off
Ⓖ : Outside branch(1st)
Ⓗ : Outside branch(2nd)
10m or
less
H 50m
L 150m
40m
ODU Capacity
Master ≥ Slave1 ≥ Slave2
40m
H
G
Slave2
Slave1
Master
L 150m
40m
H 50 m
40m
D
D
DD D
D
F
E
MFL67705803 2018. 9. 17. 오오 12:58 Page 24
Page 25
Refrigerant piping system
Installation Manual 25
ENGLISH
Combination of Y branch/header method
Single outside unit system
Example : 5 Indoor Units connected
Ⓐ : Outside Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header branch
Ⓕ : Pinch off
Series outside unit system
Example : 5 Indoor Units connected
Ⓐ : Outside Unit
Ⓑ : 1st branch
Ⓒ : Y branch
Ⓓ : Indoor Unit
Ⓔ : Header branch
Ⓕ : Pinch off
Ⓖ : Outside branch(1st)
Ⓗ : Outside branch(2nd)
10m or
less
H 50m
Slave2
Slave1
Master
L 150m(200m : Conditional application)
40m(90m : Conditional application)
ODU Capacity
Master ≥ Slave1 ≥ Slave2
40m
H
G
L 150m(200m : Conditional application)
40m(90m : Conditional application)
H 50m
40m
* If it is conditionally installed, refer to (table 1).
* If it is conditionally installed, refer to (table 1).
MFL67705803 2018. 9. 17. 오오 12:58 Page 25
Page 26
26Outside Unit
WARNING
• When you use a header branch, it is recommended that difference of piping length for pipes
connected to the Indoor Unit is minimized. Performance difference between Indoor Units may
occur.
• When the any one (or both) of below conditions are satisfied, the diameter of main pipe (A)
must be increased according to below table.
- The equivalent length between outdoor unit and the farthest indoor unit is 90m or more
(Liquid and Gas pipes are increased)
Refrigerant piping system
Ú Refrigerant pipe diameter from branch to branch (B,C,D)
Downward Indoor Unit
total capacity(kW)
Liquid pipe(mm)Gas pipe(mm)
≤ 5.6
Ø 6.35Ø 12.7
< 16.0Ø 9.52Ø 15.88
≤ 23.0
Ø 9.52Ø 19.05
< 33.0Ø 9.52Ø 22.2
< 47.0Ø 12.7Ø 28.58
< 71.0Ø 15.88Ø 28.58
< 104.0Ø 19.05Ø 34.9
< 174.0Ø 19.05Ø 41.3
Ú Total pipe length limited
Classification
Section Type Y branch Y/header branch Header branch
Maximum
permitted
length
Outdoor 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
Corresponding
pipe length
175 m
(Conditionally 225 m)*
175 m
(Conditionally 225 m)*
175 m
Total pipe length
(Outdoor unit ÷
total indoor unit)
300 m
(Conditionally 500 m)*
300 m
(Conditionally 500 m)*
300 m
(Conditionally 500 m)*
Permitted
height
Outdoor unit
÷ indoor unit
height
difference(H)
50 m 50 m 50 m
Indoor unit
÷ indoor unit
height
difference(h)
40 m 40 m 40 m
Maximum pipe
length after
1st branch
Actual pipe
length(l)
40 m
(Conditionally 90m)*
40 m
(Conditionally 90m)*
40 m
MFL67705803 2018. 9. 17. 오오 12:58 Page 26
Page 27
Installation Manual 27
ENGLISH
Refrigerant piping system
RequiredExample
1
Select the diameter of the pipe between the 1st branch and the last
branch to be 1 level larger.
Provided that, it is not necessary if
the pipe diameter is the same as the
main pipe.
If the pipe diameter(B, C) connected after the 1st branch is larger than the main pipe diameter(A), install the
pipe diameter(B, C) connected after the 1st branch to be the same as the main pipe diameter(A).
Example) If indoor units are connected 120 % to 29 kW
• Outdoor unit main pipe diameter(A): (Gas pipe) (Fluid pipe)
• Pipe diameter(B, C) after the 1st branch according to 120% indoor unit combination(34.8kW):
(Gas pipe) (Fluid pipe)
Therefore, select the pipe diameter(B, C) after the 1st branch to be main pipe diameter(A) (Gas pipe) (Fluid pipe)
u Cautions for Y branch pipe
MFL67705803 2018. 9. 17. 오오 12:58 Page 27
IDU
Direction
L
H 50 m
40 m
Page 28
28Outside Unit
Refrigerant piping system
Indoor unit connection
‘ Indoor unit connecting pipe from branch (a~f)
Indoor unit capacity [kW(Btu/h)]
≤ 5.6(19,100)
< 16.0(54,600)
≤ 22.4(76,400)
< 33(112,600)
Ø6.35(1/4)
Ø9.52(3/8)
Ø9.52(3/8)
Ø9.52(3/8)
Ø12.7(1/2)
Ø15.88(5/8)
Ø19.05(3/4)
Ø22.2(7/8)
Liquid pipe
[mm(inch)]
Gas pipe
[mm(inch)]
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.
WARNING
• It is recommended to install the difference between the length of the pipe after header branch(a~f) and the
length of the pipe connected to indoor unit to be the minimum.
• As the pipe length difference increases, there may be performance differences between indoor units.
• Y branch and header branch cannot be used after header branch.
u Cautions for header branch pipe
MFL67705803 2018. 9. 17. 오오 12:58 Page 28
Page 29
Refrigerant piping system
Installation Manual 29
ENGLISH
- The pipes between the outside units 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.
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)
Examples of Wrong Pipe Connections
• If outside units are located at different level, oil trap must be installed after each Y branch.
• Oil trap should be located at same level of Y branch. (Heat Pump : High Pressure Vapor / Heat Recovery : High Pressure
Vapor & Low Pressure Vapor)
• If pipe is higher than outside unit, oil trap must be installed after each Y branch
• Oil trap should be located at same level of Y branch. (Heat Pump : High Pressure Vapor / Heat Recovery : High Pressure
Vapor & Low Pressure Vapor)
MFL67705803 2018. 9. 17. 오오 12:58 Page 29
Level
Level
Level
Level
Page 30
Refrigerant piping system
30Outside Unit
- 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)
- 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.
Toward indoor unit
Toward indoor unit
2 m(6.6 ft) or less
2 m(6.6 ft) or less
2 m(6.6 ft) or longer
0.2 m(0.66 ft) or longer
Oil Trap
(Example 2)
(Example 1)
MFL67705803 2018. 9. 17. 오오 12:58 Page 30
Page 31
Installation Manual 31
ENGLISH
Refrigerant piping system
Calculation of amount of refrigerant
The calculation of the additional charge should take account of the diameter and length of the pipe.
Attach the additional refrigerant table of IDU.
h
h
0.2m
Toward indoor unitToward indoor unit
Oil Trap
(Example 3)
MFL67705803 2018. 9. 17. 오오 12:58 Page 31
Product Charge(kg)
A
Additional charge (kg)
B
Total liquid pipe (m): Ø25.4 mm
=
+
Total liquid pipe (m): Ø22.2mm
+
Total liquid pipe (m): Ø19.05mm
+
Total liquid pipe (m): Ø15.88mm
+
Total liquid pipe (m): Ø12.7mm
+
Total liquid pipe (m): Ø9.52mm
+
Total liquid pipe (m): Ø6.35mm
+
CAUTION
CF(kg)
(Correction Factor)
Total amount(kg)
If a negative result is obtained from
the calculation, no refrigerant needs
to be added.
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)
+=
AB
Ex) 10HP
Outside unit
Header branch
Indoor unit
A : Ø9.52, 50m
B : Ø9.52, 10m
C : Ø9.52, 10m
D : Ø9.52, 10m
E : Ø6.35, 10m
Additional Charge = A x 0.061 + B x 0.061 + C x 0.061
+ D x 0.061 + E x 0.022 + CF
= 50 x 0.061 + 10 x 0.061 + 10 x 0.061
+ 10 x 0.061 + 10 x 0.022 + 0(CF)
= 5.1kg
Page 32
32Outside Unit
Refrigerant piping system
▶Regulation for refrigerant leakage
: the amount of refrigerant leakage should satisfy the following equation for human safety.
If the above equation cannot be satisfied, the following steps must be followed.
- Selection of air conditioning system: Select one of the following
1. Installation of effective opening part: At the top and bottom of the door connecting the room to the outside, create an opening
with or without the door of with 0.15% of floor space or above.
2. Recheck of outside unit capacity and piping length
3. Reduction of the amount of refrigerant
4. Installation of 2 or more security devices (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
Ventilation system prevents the refrigerant density from increasing when the refrigerant is leaked by the installation.
Ventilation system comes in two types; external air inflow type or exhaust type. External air inflow type is recommended due to
the characteristics of the refrigerant.
Always operate the ventilation system irrelevant from whether the air conditioner is used or not and whether the indoor or not.
When it is impossible to operate this and in case of a refrigerant leakage by the sensor, the ventilation system is automatically
operated.
- Limitation in piping work
: Prepare for earthquake and thermal stress
- Reduction of all refrigerant charge amount of the refrigerant facility (When calculated value exceeds 0.44kg/m
3
)
1. Shorten the refrigerant pipe length.
Change the location of the outside unit and shorten the length of the refrigerant pipe to reduce all refrigerant charge amount.
WARNING
Total amount of refrigerant in the system
Volume of the room at which indoor unit of the least capacity is installed
≤ 0.44 ( kg / m
3
)
Note:
Fill in the f-gas Label attached on outside about the quantity of the fluorinated greenhouse gases
① Manufacturing site (See Model Name label)
② Installation site (If possible being placed adjacent to the service points for the addition or removal of re-
frigerant)
③ The total Charge (①+②)
MFL67705803 2018. 9. 17. 오오 12:58 Page 32
Page 33
Installation Manual 33
ENGLISH
1. Use the following materials for refrigerant piping.
• 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 materials. Always blow it clean with a dry inert
gas.
3. Use care to prevent dust, water or other contaminants from entering the piping during installation.
4. Reduce the number of bending portions as much as possible, and make bending radius as big as possible.
5. 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.
6. Always observe the restrictions on the refrigerant piping (such as rated length, difference in height, and piping diame-
ter).
Failure to do so can result in equipment failure or a decline in heating/cooling performance.
7. A second branch cannot be made after a header. (These are shown by.)
8. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always properly
charge the unit. When servicing, always check the notes concerning both the piping length and the amount of additional refrigerant.
9. Never perform a pump down. This will not only damage the compressor but also deteriorate the performance.
10. Never use refrigerant to perform an air purge. Always evacuate using a vacuum pump.
Caution
0.99
22.2
1.1
31.8
1.21
34.9
1.35
38.1
1.43
41.3
0.99
28.58
0.99
25.4
0.99
19.05
0.99
15.88
0.8
12.7
0.8
9.52
0.8
6.35
Minimum
thickness [mm]
Outer diameter
[mm]
Refrigerant piping system
To Outside Unit
Sealed Piping
A
A
B
A
B
MFL67705803 2018. 9. 17. 오오 12:58 Page 33
Page 34
34Outside Unit
Refrigerant piping system
Branch pipe Fitting
• Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.)
• Y-branches between the outside units must be installed horizontally.
• 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.
• When the number of pipes to be connected is
smaller than the number of header branches, install a cap to the unconnected branches.
• 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
MFL67705803 2018. 9. 17. 오오 12:58 Page 34
Y branch
To Outside Unit
A
B
A
To Branch Piping or Indoor Unit
B
Horizontal
plane
Within +/- 10°
A
Viewed from point A
in direction of arrow
Tap e
(field supply)
Header
Insulator
(included with kit)
Liquid and gas
pipe joints
A
A
B
Insulator for
field piping
To outside unit
To indoor unit
B
C
Page 35
Installation Manual 35
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 only.
• 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.
Horizontal plane
View from point B in the direction of the arrow
Refrigerant piping system
MFL67705803 2018. 9. 17. 오오 12:58 Page 35
B
Pinched pipe
Insulate the header using
the insulation
material attached to the
branch pipe kit
as shown in the figure.
Insulator
Cap pipe
Tap e
Insulator of field pipe
Insulator for cap pipe
Tape
Page 36
36Outside Unit
Refrigerant piping system
Thermal insulation of refrigerant piping
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.
MFL67705803 2018. 9. 17. 오오 12:58 Page 36
BA C
A
Heat insulation material
B
Pipe
C
Outer covering
(Wind the connection part and cutting part of
heat insulation material with a finishing tape.)
• Do not insulate gas or low pressure pipe and liquid or high
Note:
When using polyethylene cover as covering material, asphalt roofing shall not be required.
• Be sure to fully insulate connecting portion.
A
A
These parts are not insulated.
C
A
A
B
C
D
E
F
Power lines
Liquid pipe
Gas pipe
Power lines
Finishing tape
Insulating material
Transmission lines
Transmission lines
Good example
Liquid pipe
A
Gas pipe
B
C
Power lines
Insulating material
D
Transmission lines
E
Penetrations
Inner wall (concealed)
A
Floor (fireproofing)
D
C
B
Roof pipe shaft
F
G
B
E
Separation
Outer wallOuter wall (exposed)
D
B
A
Penetrating portion on fire
limit and boundary wall
G
D
B
H
F
I
A
Sleeve
E
I
1m1m
Heat insulating material
Lagging
B
Caulking material
Band
Waterproofing layer
Sleeve with edge
Lagging material
Mortar or other incombustible caulking
Incombustible heat insulation material
J
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.)
Page 37
Installation Manual 37
ENGLISH
Y branch pipe and header branch pipe type
Y branch pipe
Y branch pipe and header branch pipe type
[unit:mm]
ModelsGas pipeLiquid pipe
ARBLN01621
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
ARBLN03321
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
708011 0
1
2
3
31 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
ARBLN07121
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
12090120
I.D31.8
2.22D.I
.5882D.I
I.D19.05
I.D15.88
I.D12.7
I.D19.05
I.D15.88
2
3
1
2
1 3
25.9D.I
25.9D.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.D12.7
I.D6.35
I.D15.88
371
394
83
11070
2
3
32
ARBLN14521
471
517
125
120130
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.D12.7I.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.D19.05
80
110 110
2
3
1
233
MFL67705803 2018. 9. 17. 오오 12:58 Page 37
Page 38
38Outside Unit
Y branch pipe and header branch pipe type
Header
[unit:mm]
ID15.88
MFL67705803 2018. 9. 17. 오오 12:58 Page 38
Models
4 branch
ARBL054
7 branch
ARBL057
4 branch
ARBL104
ID12.7
ID15.88
ID12.7
ID15.88
ID12.7
ID15.88
ID15.88
Gas pipeLiquid pipe
360
ID12.7
540
400
ID15.88
ID19.05
120
ID15.88
ID19.05
160
ID19.05
120
ID15.88
120
ID15.88
120
360
120
ID6.35
150
ID12.7
150
120
ID15.88
150
ID9.52
ID6.35
ID9.52
ID6.35
540
360
ID6.35
ID12.7
ID9.52
ID9.52
ID12.7
120
120
ID9.52
120
ID9.52
120
150
150
ID6.35
120
ID9.52
150
7 branch
ARBL107
10 branch
ARBL1010
10 branch
ARBL2010
ID12.7
ID15.88
ID12.7
ID15.88
ID12.7
ID15.88
580
760
775
ID28.58 ID25.4
ID19.05
ID31.8 ID34.9
ID19.05
160
ID19.05
ID22.2
160
182
ID15.88
120
ID22.2ID28.58 ID25.4
ID15.88
120
ID22.2ID28.58 ID25.4
150
ID15.88
120
ID28.58
ID9.52
ID12.7
700
150
150
ID6.35
ID9.52
720
ID6.35
ID9.52
700
60*9=540
ID6.35
ID9.52
ID9.52
ID9.52
120
ID9.52
ID12.7
ID6.35
150
120
ID9.52ID12.7
120
ID6.35
150
120
ID9.52
107
ID6.35
150
120
ID19.05ID15.88
Page 39
Installation Manual 39
ENGLISH
Leakage test and vacuum
Leak test
Leak test should be m
ade by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm2). 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.
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 0.01
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.
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.
CAUTION
Leakage test and vacuum
MFL67705803 2018. 9. 17. 오오 12:58 Page 39
Master outside unit
Close
Close
Nitrogen gas
cylinder
Gas pipe
Liquide pipe
Liquid side
Indoor unit
Gas side
Page 40
40Outside Unit
Leakage test and vacuum
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).
1. Evacuate the system from the liquid and gas pipes with a vacuum pump for over 2 hrs and bring the system
to -100.7kPa.
After maintaining system under that condition for over 1 hr, confirm the vacuum gauge rises. The system may
contain moisture or leak.
2. Following should be executed if there is a possibility of moisture remaining inside the pipe.
(Rainwater may enter the pipe during work in the rainy season or over a long period of time)
After evacuating the system for 2 hrs, give pressure to the system to 0.05MPa(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.
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.)
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.
WARNING
MFL67705803 2018. 9. 17. 오오 12:58 Page 40
Vacuum pump
Master outside unit
Close
Close
Gas pipe
Liquide pipe
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.
Liquid side
Indoor unit
Gas side
Page 41
Installation Manual 41
ENGLISH
Electrical Wiring
Electrical Wiring
Areas of Caution
Be sure to correct the outside unit to earth. Do not connect earth line to any gas pipe, water pipe,
lightening rod or telephone earth line. If earth is incomplete, it may cause an electric shock.
Be sure to have authorized Electrical engineers do 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.
1. Follow ordinance of your governmental organization for technical standard related to electrical equipment,
wiring regulations and guidance of each electric power company.
2. Install the outside unit transmission line away from the power source wiring so that it may not affected by electric noise from the power source. (Do not run it through the same conduit.)
3. Be sure to provide designated grounding work to outside unit.
4. 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.
5. Never connect the main power source to terminal block of transmission line. If connected, electrical parts will
be burnt out.
6. Use 2-core shield cable for transmission line.(O mark in the figure below) If transmission lines of different
systems are wired with the same multiplecore cable, the resultant poor transmission and receiving will cause
erroneous operations. ( mark in the figure below)
7. Only the transmission line specified should be connected to the terminal block for outside unit transmission.
2-core shield cable Multi-core cable
WARNING
CAUTION
MFL67705803 2018. 9. 17. 오오 12:58 Page 41
Outside UnitOutside Unit
Indoor
Unit
Indoor
Unit
Remote
control
Remote
control
Indoor
Unit
Indoor
Unit
Remote
control
Remote
control
Outside UnitOutside Unit
Indoor
Unit
Indoor
Unit
Remote
control
Remote
control
Indoor
Unit
Indoor
Unit
Remote
control
Remote
control
Page 42
42Outside Unit
Electrical Wiring
• Use the 2-core shield cables for transmission lines. Never use them together with power cables.
• The conductive shielding layer of cable should be grounded to the metal part of both units.
• Never use multi-core cable
• As this unit is equipped with an inverter, to install a phase leading capacitor not only will deteriorate
power factor improvement effect, but also may cause capacitor abnormal heating. Therefore, never
install a phase leading capacitor.
• Keep power imbalance within 2% of the supply rating. Large imbalance will shorten the life of the
smoothing capacitor.
• Introducing with a missing N-phase or with a mistaken N-phase will break the equipment.
WARNING
Control Box and Wiring Location
- Unscrew all the screw, pull out the panel.
- Connect the transmission wire between outside unit and indoor
unit, the connection between outside unit and central controller
system pass through the sub PCB for central control.
- When connecting indoor unit with the shield cable, ground at
the grounding screw.
When connecting central controller with the shield cable,
ground at the grounding screw.
- Refer to next page about the distance between main power
cable and communication cable.
- Refer to page 44 for Auto Addressing and page 47 for Test Run
2-Core Shield CableMulti-Core Cable
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
MFL67705803 2018. 9. 17. 오오 12:58 Page 42
Front
Panel
Page 43
Installation Manual 43
ENGLISH
Electrical Wiring
Transmission and Power Lines
1) Transmission cable
• Types : Shielded Cable CVVS or CPEVS
• Diameter : 1.0 ~ 1.5 mm
2
• Insulation material : PVC
• Maximum allowable temperature: 60°C
• Maximum allowable line length: under 500m
2) Remote control cable
• Types : 3-core cable
3) Simple central control cable
• Types : 4-core cable (Shielding wire)
• Diameter : 1.0 ~ 1.5 mm
2
• Insulation material : PVC
4) Separation of transmission and power lines
• If transmission and power lines are run alongside each other then here is a strong likelihood of operational
faults developing due to interference in the signal wiring caused by electrostatic and electromagnetic coupling.
Note:
1. 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 line involved.
2. If the power supply waveform continues to exhibit some distortion the recommended spacing in the table
should be increased.
• If the lines are laid inside conduits then the following point must also be taken into account when grouping
various lines together for introduction into the conduits.
• Power lines(including power supply to air conditioner) and signal lines must not be laid inside the same conduit.
• In the same way, when grouping the power lines and signal lines should not be bunched together.
Current capacity of power line Spacing
10A 300mm
50A 500mm
100A 1,000mm
Exceed 100A 1,500mm
100V or more
• 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.
• Use a power wire pipe for the power wiring.
CAUTION
MFL67705803 2018. 9. 17. 오오 12:58 Page 43
Page 44
44Outside Unit
Electrical Wiring
u Example for mistake of wiring
• Do not separately connect the power of the indoor unit.
Never install individual switch or individual outlet to cut the power connecting the indoor unit.
Transmission cable(2lines Shield cable) : Indoor~ Outside unit
Single phase 60Hz 220V
Breaker
Page 45
Installation Manual 45
ENGLISH
Electrical Wiring
1. 60Hz
u Example Connection of Power and Communication Cables
n Single Outside Unit - 3Ø, 380-415 V
R S T
Switch
Fuse
L
N
Communication Line
(2 Wires Cable)
Power Line
(4 Wires Cable)
Communication Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
[Outside Unit]
[Indoor Units]
3 Phase 4 Wires
Power supply
50Hz 380-415 V
Power supply
1 Phase 50Hz
220-240 V
(Main Switch)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
Pull Box
(Installer option)
The GND terminal at the main PCB is
a ‘-’ terminal for day contact, it is not the
point to make ground connection.
Between Indoor and Master Outside unit
Master
Outside Unit
3(A) 4(B)
SODU B SODU A IDU B IDU A INT B INT A
3(A) 4(B)3(A) 4(B)
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage.
•
Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install a main electrical protection to interrupt power to all equipment of the system 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.
WARNING
Frequency
Voltage range(V)
OutdoorIndoor
60Hz460V220V
MFL67705803 2018. 9. 17. 오오 12:58 Page 45
Page 46
Electrical Wiring
46Outside Unit
n 3Ø, 380-415 V
Frequency
Voltage range(V)
OutdoorIndoor
60Hz460V220V
• Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage,
Communication disorder by noise effect and motor current leakage.
•
Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply.
• Install a main electrical protection to interrupt power to all equipment of the system 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.
WARNING
MFL67705803 2018. 9. 17. 오오 12:58 Page 46
3 Phase 4 Wires
Power supply
50Hz 380-415 V
(Main Switch)
Power supply
1 Phase 50Hz
220-240 V
N
L
Switch
Fuse
Power Line
(2 Wires Cable)
(4 Wires Cable)
R S T
Power Line
Pull Box
(Installer option)
Switch
R S T
Fuse
Switch
Fuse
Pull Box
(Installer option)
R S T
[Master]
Pull Box
(Installer option)
[Slave1] [Slave2]
Pull Box
(Installer option)
Communication Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
Communication Line
(3 Wires Cable)
Power Line
(2 Wires Cable)
Power Line
(2 Wires Cable)
[Indoor Units]
Between Indoor and Master Outside unit
SODU B SODU A IDU B IDU A INT B INT A
3(A) 4(B)3(A) 4(B)3(A) 4(B)
The GND terminal at the main PCB is a ‘-’
terminal for dry contact.
It is not the point to make ground connection.
- Make sure that terminal number of master
and slave Outside units are matched.
Master
Outside Unit
SODU B SODU A IDU B IDU A INT B INT A
SODU B SODU A IDU B IDU A INT B INT A
SODU B SODU A IDU B IDU A INT B INT A
Master
Outside unit
Slave1
Outside Unit
Slave2
Outside Unit
Page 47
Installation Manual 47
ENGLISH
Electrical Wiring
u Example Connection of Communication Cable
[BUS type]
• Connection of communication cable must be installed like below figure between indoor unit to outside unit.
[STAR type]
• Abnormal operation can be caused by communication defect, when connection of communication cable is installed like
below figure(STAR type).
MFL67705803 2018. 9. 17. 오오 12:58 Page 47
Page 48
48Outside Unit
Dip switch setting
Mode Function OptionValue Action
Remarks
Content
Display1
Content
Display2
Content
Display3
Content
Display4
Implement
Display5
Installation
Cool & Heat Selec-
tor
OFF
op1~op2
Selected the
option
- -
Change the
set value
Blank
Save in
EEPROM
Geothermal mode
setting
OFFON
Selected the
option
- -
Change the
set value
Blank
Save in
EEPROM
Sol. Valve
200 V output
OFFON
Selected the
option
- -
Change the
set value
Blank
Save in
EEPROM
Variable water flow
control
OFFON
Selected the
option
- -
Change the
set value
Blank
Save in
EEPROM
ODU address
-
-
0~255
Set the
value
Change the
set value
Blank
Save in
EEPROM
Target pressure ad-
justing
OFF
op1~op3
Selected the
option
- -
Change the
set value
Blank
Save in
EEPROM
Use Sump Heater
OFFON
Selected the
option
- -
Change the
set value
Blank
Save in
EEPROM
IDU capacity
adjusting
OFFON
Selected the
option
- -
Change the
set value
Blank
Save in
EEPROM
* Functions save in EEPROM will be kept continuously, though the system power was reset.
To cancel the function you need to set OFF.
DIP-SW01 7 - Segment
SW01C ( : confirm)
SW02C (ඔ : backward)
SW03C (ඖ : forward)
SW04C (
: cancel)
SW01D (reset)
Setting the function
Select the mode/function/option/value using ‘▶’, ‘◀’ Button and confirm that using the ‘●’ button after dip switch
No.5 is turned on.
CAUTION
• It is only executed when all indoor units are off.
Electrical Wiring
MFL67705803 2018. 9. 17. 오오 12:58 Page 48
Page 49
Installation Manual 49
ENGLISH
Electrical Wiring
Dip switch setting
1. Set the dip switch and turn on the power of the outside unit to check whether the set value is correctly en-
tered in the 7 segment.
2. This function is shown for only 2 seconds after the power is connected.
n
Checking according to dip switch setting
• You can check the setting values of the Master outdoor unit from the 7 segment LED.
The dip switch setting should be changed when the power is OFF.
•
It checks whether the input is properly performed without the bad contact of the dip switch or not
n
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.
Master model capacity → Slave1 model capacity → Slave2 model capacity → Slave3 model capacity
→ Total capacity → System type → Power type → Product type
Product may not properly operate if the relevant DIP switch is not properly setup.
MFL67705803 2018. 9. 17. 오오 12:58 Page 49
Page 50
50Outside Unit
Indoor unit auto addressing
• The address of the indoor units would be set by auto addressing.
1) Wait for 3 minutes after applying power supply (master and slave outside unit, indoor unit)
2) Press the switch of the outside unit (SW02V) for 5 seconds.
3) A "88" is indicated on 7-segment LED of the outside unit PCB.
4) For completing addressing, 2~7 minutes are required depending on numbers of indoor unit connection set.
5) Numbers of indoor unit connection set whose addressing is completed are indicated for 30 seconds on 7-segment LED of
the outside unit PCB.
6) After completing addressing, address of each indoor unit is indicated on the wired remote controller display window.
(CH01, CH02, CH03, .... CH06 : Indicated as number of indoor unit connection set.)
[MAIN PCB]
DIP-SWITCH 7 - Segment
SW01C ( : confirm)
SW02C (ඔ : backward)
SW03C (ඖ : forward)
SW04C (
: cancel)
SW01D (reset)
• When replacing the indoor unit PCB, you must execute the auto addressing again. Always execute
this with all the power of indoor units and outside units connected. If the power is not connected to
the indoor unit, it can generate an operation error.
• When power is connected to the Multi V Water II for the first time, it will standby for more than 3 min-
utes to improve the indoor unit communication, and then the address must be set.
WARNING
Electrical Wiring
MFL67705803 2018. 9. 17. 오오 12:58 Page 50
Page 51
Installation Manual 51
ENGLISH
Electrical Wiring
u The Procedure of Automatic Addressing
MFL67705803 2018. 9. 17. 오오 12:58 Page 51
Power On
Waiting 3 minutes
Press RED Button for 5 sec.
(SW01C)
7-segment LED = 88
Don’t press RED Button
(SW01C)
Waiting about 2~7 minutes
7-segment LED
= 88
YES
OK
Turn OFF all DIP switches of the
master main board before
automatic address setting.
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
NOCheck 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 52
52Outside Unit
Electrical Wiring
Outside unit Dry Contact installation and connection
Mode setting without Cool/Heat Selector
• Connect wires as below figure at the hole of backside of Outside Unit Dry Contact.
• Insert the wire in the connection hole pushing the "Push" button.
• Setting Main PCB Dip SW of Master Outside Unit.
In case of no Cool/Heat Selector, connect signal terminal block as below figure And description.
Connect signal terminal block as below figure and description.
- How to set mode without Cool/Heat Selector
• Cooling Mode Setting
¿ ‘ GND Connection
¡ ‘ Off (Open)
• Heating Mode Setting
¿ ‘ GND Connection
¡ ‘ GND Connection
• Fan Mode Setting
¿ ‘ Off (Open)
¡ ‘ GND Connection
Mode Change
Push Button
Heating
Outside Unit
Fan
Cooling
MFL67705803 2018. 9. 17. 오오 12:58 Page 52
GND
GND
GND
Page 53
Installation Manual 53
ENGLISH
Test Run
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.
Design the system including cooling tower, boiler, pump etc.
- Check the equipment capacity (Water volume, temperature control range).
Install the water pipe
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.
- 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.
Equipment design
Water pipe system installation
Water supply system test run
Execute the product test run
Judging whether there is any
problem with the water supply
Water supply pipe and product
connection
MFL67705803 2018. 9. 17. 오오 12:58 Page 53
Page 54
54Outside Unit
Test Run
Precaution before test run
1
2
3
4
5
Check whether the air is completely removed and the water supply is flowing smoothly.
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.
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.
Check whether the liquid and gas pipes are open.
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.)
• 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.)
WARNING
MFL67705803 2018. 9. 17. 오오 12:58 Page 54
Page 55
Installation Manual 55
ENGLISH
Test Run
How to Cope with Abnormal Test Run
Item
Phenomenon
Cause Checkpoint and resolution
Check whether the water supply pump is operating.
Check whether the water supply pipe is clogged.
(Clean strainer, valve locked, valve issue, air trapped etc.)
Check whether the flow switch is normal condition.
(Clean strainer, valve locked, valve issue, air trapped etc.)
Check whether water supply pump is operating.
Check whether the water supply pipe is clogged.
(Clean strainer, valve locked, valve issue, air trapped etc.)
Whether
water is
supplied
Water not supplied or flow rate
is insufficient
Water not supplied or flow rate
is insufficient(During Cooling)
CH32
CH34
When connecting the flow switch,
water doesn’t flow or the amount
of its flow lacks due to the
checked error related to water.
CH24
Daily check/management
Flow rate control
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.)
MFL67705803 2018. 9. 17. 오오 12:58 Page 55
Page 56
56Outside Unit
Test Run
Maintenance/Repair checklist
Product operating condition
Heat exchanger cleaning (Wash)
Strainer cleaning
Water quality check
Refrigerant leakage check
Indoor unit filter cleaning
Period (Year)
Checkpoint
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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
● ● ●
● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
● ●
● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
(●: Check mark)
MFL67705803 2018. 9. 17. 오오 12:58 Page 56
Page 57
Installation Manual 57
ENGLISH
Test Run
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 LED of 7-segment indicates error number, 3rd LED indicates unit number.
Ex) 211 : No.21 error of master unit
213 : No.21 error of slave2
011 → 051 : No.105 error of master unit
DisplayTitleCause of Error
01- Air temperature sensor of indoor unitAir temperature sensor of indoor unit is open or short
02- Inlet pipe temperature sensor of indoor unitInlet pipe temperature sensor of indoor unit is open or short
03-
Communication error : wired remote controller ÷ indoor unit
Failing to receive wired remote controller signal in indoor unit PCB
04- Drain pumpMalfunction of drain pump
05-
Communication error : outdoor unit ÷ indoor unit
Failing to receive outdoor unit signal in indoor unit PCB
06- Outlet pipe temperature sensor of indoor unitOutlet pipe temperature sensor of indoor unit is open or short
09- Indoor EEPROM Error
In case when the serial number marked on EEPROM of Indoor unit
is 0 or FFFFFF
10- Poor fan motor operation
Disconnecting the fan motor connector/Failure of indoor fan motor lock
17- Inlet Air temperature sensor of FAUAir temperature sensor of indoor unit is open or short
21*
Master outside unit inverter compressor IPM
Fault
Master outside unit inverter compressor drive IPM error
22*
Inverter Board Input Over Current(RMS) of
Master outside Unit
Master Outside Unit Inverter Board Input Current excess (RMS)
23*
Master outside unit inverter compressor DC link
under-voltage
DC voltage is not charged after master outside unit operating relay is
turned on
24* Master outside unit high pressure switch
Compressor maintenance by master outside unit high pressure switch
Flow rate insufficiency or flow switch trouble of master outside unit
25*
Master outside unit input voltage overvoltage/under-voltage
Master outside unit input voltage over-voltage or under-voltage
26*
Master outside unit inverter compressor operation
failure error
Initial operation failure due to master outside unit inverter compressor error
28*
Master outside unit inverter DC link over-voltage
error
Compressor turned Off due to master outside unit inverter DC voltage
over-charge
29*
Master outside unit inverter compressor overcurrent
Master outside unit inverter compressor error or operating component
(IPM) error operation
32*
Master outside unit inverter compressor
discharge temperature over-rise
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
34* Master outside unit high pressure over-rise
Compressor turned off due to master outside unit high pressure over-rise
Flow rate insufficiency or flow switch trouble of master outside unit
35* Master outside unit low pressure over-drop.
Compressor turned off due to master outside unit low pressure overdrop.
36*
Master Outside Unit Low Compression Ratio Limited Master Outside Unit stayed under low Compression limit for 3 minutes
39*
Master Outside unit Communication error between
Master outside unit PFC and inverter board
Master Outside unit inverter compressor current detection (CT) sen-
sor disconnection or short circuit
Indoor Unit related ErrorOutside Unit related Error
MFL67705803 2018. 9. 17. 오오 12:58 Page 57
Page 58
1 0 4 *
Communication Error Between Master Outdoor
Unit and Other Outdoor Unit
Failing to receive Slave Unit signal at main PCB of Master Outdoor
Unit
1 1 3 *
Master Outdoor Unit Liquid pipe Temperature
Sensor Error
Liquid pipe temperature sensor of Master Outdoor Unit is open or
short
1 1 5 *
Master Outdoor Unit Subcooling Outlet Tempera-
ture Sensor Error
Master Outdoor Unit Subcooling Outlet Temperature Sensor open or
short
1 1 6 * Master Outdoor Unit Oil Level Sensor ErrorOil Level Sensor of Master Outdoor Unit is open or short
1 4 5 *
Master outdoor unit Main Board - External Board
communication Error
Master outdoor unit Main Board - External Board communication
Error
1 5 1 *
Failure of operation mode conversion at Master
Outside Unit
Failure of operation mode conversion at Master
Outside Unit
1 8 2 * Communication error between MICOMsCommunication error between main MICOM and sub MICOM
58Outside Unit
Test Run
DisplayTitleCause of Error
40*
Master outside unit inverter compressor CT sensor error
Master outside unit inverter compressor current detection (CT) sensor
disconnection or short circuit
41*
Master outside unit inverter compressor discharge temperature sensor error
Master outside unit inverter compressor discharge temperature sen-
sor disconnection or short circuit
42* Master Outdoor Unit Low Pressure Sensor Fault Master Outdoor Unit Low Pressure Sensor open or short
43* Master Outdoor Unit High Pressure Sensor Fault Master Outside Unit High Pressure Sensor open or short
44* Master Outside unit air temperature sensor error
Master Outside unit air temperature sensor disconnection or short circuit
46*
Master outside unit suction temperature sensor error
Master outside unit suction temperature sensor disconnection or
short circuit
49*
Master outside unit IGBT temperature sensor error
Master out side unit IGBT temperature sensor disconnection or
short circuit
50* Master outside unit 3 phase power missingMaster outside unit power line phase missing
51*
Over-capacity (Indoor unit capacity sum is excessive) connection
Excessive connection of indoor unit connection display value
(Different from outside unit)
52*
Communication error with master outside unit in-
verter controller
When the inverter controller signal is not received from the master
outside unit inverter controller
53*
Communication error with master Outside unit
controller and indoor unit
When the indoor unit control signal is not received from the master
Outside unit controller
57*
Communication error between Master outside
unit inverter controller
Failing to receive inverter contoroller signal at Master Outdoor Unit
controller
59* Mixing Installation of Sub Outdoor Unit
Mixing Installation of Old Sub Outdoor Unit and New Slave Outdoor Unit
60* Master outside unit inverter PCB EEPROM error Master outside unit inverter PCB EEPROM ACCESS error
62* Master outside unit inverter IGBT over-rise error
Master outside unit inverter IGBT when the temperature rises above 110 ℃
65*
Master outside unit inverter IGBT temperature
sensor error
Master outside unit inverter IGBT temperature sensor disconnection
or short circuit
71* PFC CT Sensor Error of Master Outdoor UnitMaster Outdoor Unit PFC CT Sensor open or short
86* Master outside unit master PCB EEPROM error
Communication error between master outside unit master MICOM
and EEPROM or EEPROM missing
88* PFC PCB EEPROM error
Communication error between master outside unit master PFC and
EEPROM or EEPROM missing
Outside Unit related Error
MFL67705803 2018. 9. 17. 오오 12:58 Page 58
Page 59
Installation Manual 59
ENGLISH
Maintenance
Maintenance
Maintenance of Shell & coil heat exchager
1) Chemical Washing
1) Connect water piping in sizes 25A(34mm) to 32A(42.7mm) expansion pipe fitting.
2) Connect the SCHEX and circulation pump through the 32A(42.7mm) water piping.
3) Install the drain pipe to the other pipe line.
4) After open upper plate of SCHEX, put 5 % Phosphoric acid aqueous solution in the case. And close the upper
plate.
5) Circulation washing for 30 minutes, using a circulation pump. After repeat 3 or 4 times this operation, discharge the
solution through the drain pipe.
6) 4),5) in the same way, circulation cleaning 3~4 times with clean water once every 30 minutes. And discharge the
water through the drain pipe.
7) Finally, In order to neutralize the acidic conditions of the coil, after circulates the water intermixed with NaOH,
discharge the water through the drain pipe.
Drain pipe
5 % Phosphoric acid / Water / NaOH
Circulation
pump
MFL67705803 2018. 9. 17. 오오 12:58 Page 59
Page 60
60Outside Unit
Maintenance
2) Mechanical Washing
3) Chemical / Mechanical Washing
1) Using the Socket Wrench, divide the case and bolt fixed on the lower plate of SCHEX.
2) Spray the Water to the horizontal direction for washing of the entire coil.
3) Brush the coil to the rotating direction and with spraying water.
4) Remove the scale divide from coil with spraying.
5) Assemble the case of SCHEX with Socket Wrench.
6) Operate the system after assembly.
1)
After open upper plate of SCHEX, put 5% Phosphoric acid aqueous solution in the case. And close the upper plate.
2) After about 1 hour, discharge 5% Phosphoric acid aqueous solution through the drain pipe.
3) Using the Socket Wrench, divide the case and bolt fixed on the lower plate of SCHEX.
4) Scrub the Coil to the direction from row 4 to row 1 with size Ø 6~8 mm brush.
5) Spray the Water to the horizontal direction for washing of the entire coil.
6) Assemble the case of SCHEX with Socket Wrench.
7) Open the upper plate then circulates the water intermixed with NaOH, discharge the water through the drain
pipe.
8) Operate the system after assembly.
• Frequently and at regular intervals, observe interior and exterior condition of all tubes and keep
them clean. Neglect in keeping all tubes clean may result in complete stoppage of flow.
At least recommend to check heat exchanger annually.
• Do not make wet the internals of outside unit, when washing the heat exchanger.
WARNING
MFL67705803 2018. 9. 17. 오오 12:58 Page 60
5 % Phosphoric acid
Water
NaOH
Page 61
Installation Manual 61
ENGLISH
Cooling tower applied method
Cooling tower applied method
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
[Open type cooling tower + Middle heat exchanger]
Heat source water of the cooling tower is supplied
directly to the outside unit system.
[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.
MFL67705803 2018. 9. 17. 오오 12:58 Page 61
Open type
cooling tower
st
1
side
Heat exchange
nd
2
side
Closed type
cooling tower
Page 62
62Outside Unit
Caution For Refrigerant Leak
The installer and system specialist shall secure safety against leakage according to local regulations or standards.
The following standards may be applicable if local regulations are not available.
Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to
such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
n Limiting concentration
Check limiting concentration along following steps and take appropriate measure depending on the situation.
n Calculate amount of all the replenished refrigerant (kg) per each refrigerant
system.
n Calculate minimum room capacity
Calculate room capacity by regarding a portion as one room or the smaller room.
(1) Without partition
(2) With partition and with opening which serve as
passage of air to adjoining room
Caution For Refrigerant Leak
Introduction
Checking procedure of limiting concentration
Limiting concentration is the limit of Freon gas concentration where immediate measures can be taken without hurting human body when refrigerant leaks in the air. The limiting concentration shall be described in the
unit of kg/m
3
(Freon gas weight per unit air volume) for facilitating calculation.
Limiting concentration: 0.44kg/m
3
(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.
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)
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
(No.1 system)
Flow of
refrigerant
Indoor unit
Room where refrigerant leaks
(Refrigerant of the whole No.1
system flows out.)
MFL67705803 2018. 9. 17. 오오 12:58 Page 62
Page 63
Installation Manual 63
ENGLISH
Caution For Refrigerant Leak
(3) With partition and without opening which serve as passage of air to adjoining room
n Calculate refrigerant concentration
n In case the concentration exceeds the limit
When the concentration exceeds the limit, change original plan or take one of the countermeasures
shown below:
• Countermeasure 1
Provide opening for ventilation.
Provide 0.15% or more opening to floor space both above and below door, or provide opening without
door.
• Countermeasure 2
Provide gas leak alarm linked with mechanical ventilator.
Reducing the outside refrigerant qty.
Pay a special attention to the place, such as a basement, etc. where refrigerant can stay, since refrigerant is
heavier than air.
Outside unit
Indoor unit
Smallest
room
(R410A)
=
Refrigerant concentration
(kg/m
3
)
Total amount of replenished
refrigerant in refrigerant facility (kg)
Capacity of smallest room where
indoor unit is installed (m
3
)
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.
Countermeasure 2
Gas leak alarm
Mechanical ventilator
Countermeasure 1
Opening effective to ventilation
Indoor unit
MFL67705803 2018. 9. 17. 오오 12:58 Page 63
Page 64
64Outside Unit
Water Solenoid Valve Control
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
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 Solenoid Valve Control
Central Control(Use DDC Port)
Individual Control(Use 220V Output Port)
MFL67705803 2018. 9. 17. 오오 12:58 Page 64
Page 65
MFL67705803 2018. 9. 17. 오오 12:58 Page 800
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