LG ARWV100LAL4 INSTALLATION MANUAL

Page 1

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.

INSTALLATION MANUAL

AIR CONDITIONER

MFL67705803

Rev.00_091718

ARWV100LAL4

www.lg.com

ENGLISH

MFL67705803 2018. 9. 17. 오오 12:58 Page 1

Page 2

2 Outside Unit

ARWV Series Outside unit Installation Manual

TABLE OF CONTENTS

Safety Precautions .........................................................................................................3

Installation Process .......................................................................................................7

Outside units Information..............................................................................................8

Environment-friendly Alternative Refrigerant R410A .................................................9

Select the Best Location................................................................................................9

Installation space ........................................................................................................10

Water control ................................................................................................................11

Lifting method ..............................................................................................................13

Installation ....................................................................................................................14

Refrigerant piping installation ....................................................................................19

Device protection unit..................................................................................................22

Refrigerant piping system ..........................................................................................23

Y branch pipe and header branch pipe type .............................................................37

Leakage test and vacuum ...........................................................................................39

Electrical Wiring ...........................................................................................................41

Test Run ........................................................................................................................53

Maintenance..................................................................................................................59

Cooling tower applied method ...................................................................................61

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

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

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Page 4

4 Outside 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.

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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

6 Outside 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

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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

) 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

8 Outside 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 Capacity HP 10 20 30

Model Name

Combination Unit ARWV100DAL4 ARWV200DAL4 ARWV300DAL4

Independent Unit

ARWV100DAL4 ARWV100DAL4 ARWV100DAL4

ARWV100DAL4 ARWV100DAL4

ARWV100DAL4

Product Refrigerant Charge kg 2.0 2.0+2.0 2.0+2.0+2.0

Maximum Connection No. of Indoor 16(25) 32(44) 49(60)

Net Weight

kg 120 × 1 120 × 2 120 × 3

lb 265 × 1 265 × 2 265 × 3

Dimensions (WxHxD)

mm (755 × 997 × 500) × 1 (755 × 997 × 500) × 2 (755 × 997 × 500) × 3

inch

(29-23/32 × 39-1/4 × 19-11/16) × 1 (29-23/32 × 39-1/4 × 19-11/16) × 2 (29-23/32 × 39-1/4 × 19-11/16) × 3

Refrigerant Connecting Pipe

Liquid mm (inch) 9.52(3/8) 12.7(1/2) 19.05(3/4)

Gas mm (inch) 22.2(7/8) 28.58(1-1/8) 34.9(1-3/8)

Water Connecting Pipe

Inlet mm

PT 25 (External Thread)

PT 25 + PT 25 (External Thread)

PT 25 + PT 25 + PT 25 (External Thread)

Outlet mm

PT 25 (External Thread)

PT 25 + PT 25 (External Thread)

PT 25 + PT 25 + PT 25 (External Thread)

Drain Outlet mm

20 (External Thread) 20 (External Thread) 20 (External Thread)

MFL67705803 2018. 9. 17. 오오 12:58 Page 8

Page 9

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

Environment-friendly Alternative Refrigerant R410A

MFL67705803 2018. 9. 17. 오오 12:58 Page 9

Page 10

10 Outside Unit

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

(Front)

350

755

100

300

(unit : mm)

800997100

600 500

H-Beam Support

(Unit : mm)

300

Product

(Outside unit)

Service area

(Front)

350

755

200

300

Product

(Outside unit)

Service area

(Front)

350

755

200

Product

(Outside unit)

Service area

(Front)

350

755

600 500

100

Page 11

Installation Manual 11

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)

< 50 0.6 ~ 1.2

50 ~ 100 1.2 ~ 2.1

100 < 2.1 ~ 2.7

ENGLISH

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Page 12

12 Outside 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

/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 70

Below 50

Below 30

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 70

Below 50

Below 30

Closed type

Basic Item

Reference Item

Effect

Circulating water Supplemented water Corrosion Scale

Water control

MFL67705803 2018. 9. 17. 오오 12:58 Page 12

Page 13

Installation Manual 13

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

40° or less

Rope supporter

WARNING

Page 14

14 Outside 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

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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.

Pipe

" A "

Gas Liquid Gas

Liquid <5.6(19,100) 1/2" 1/4" 0.5~0.8 0~0.5 <16.0(54,600) 5/8" 3/8" 0.8~1.0 0.5~0.8 <22.4(76,400) 3/4" 3/8" 1.0~1.3 0.5~0.8

Indoor unit [kW(Btu/h]

Copper

tube

90°

Slanted Uneven Rough

Pipe

Reamer

Point down

Bar

Copper pipe

Clamp handle

Red arrow mark

Cone

Yoke

Handle

Bar

"A"

Inclined

Inside is shining without scratches.

Smooth all round

Even length

all round

Surface

damaged

Cracked Uneven

thickness

= Improper flaring =

ENGLISH

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Page 16

16 Outside Unit

Precautions when connecting pipes

• See the following table for flare part machining dimensions.

• See the following table for tightening torque.(Applying too much torque may cause the flares to crack.)

• After all the piping has been connected, use nitrogen to perform a gas leak check.

FLARE SHAPE and FLARE NUT TIGHTENING TORQUE

pipe size tightening torque(Ncm) A(mm) flare shape

Ø9.5 3270-3990 12.8-13.2

Ø12.7 4950-6030 16.2-16.6

Ø15.9 6180-7540 19.3-19.7

Installation

Union

CAUTION

• Always use a charge hose for service port connection.

• After tightening the cap, check that no refrigerant leaks are present.

• When loosening a flare nut, always use two wrenches in combination, When connecting the piping, always use a spanner and torque wrench in combination to tighten the flare nut.

• When connecting a flare nut, coat the flare(inner and outer faces) with oil for R410A(PVE) and hand tighten the nut 3 to 4 turns as the initial tightening.

MFL67705803 2018. 9. 17. 오오 12:58 Page 16

±2

90°

45°

±2

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

Ø28.58 Ø31.75

Ø34.9 Ø38.1

Above t19

Above t25

Ø44.45

Fastening band (accessory)

Refrigerant piping

Thermal insulator (accessory)

Note4)

Negative condition

Above t9

Above t13

Above t25

Page 18

Installation

18 Outside 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 units Model

Gas Pipe Liquid 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.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)

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.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)

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)

(Master)

(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

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.

CLOSE OPEN

Page 20

20 Outside 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.)

CAUTION

Installation of water pipe

MFL67705803 2018. 9. 17. 오오 12:58 Page 20

Page 21

Installation Manual 21

ENGLISH

Refrigerant piping installation

MFL67705803 2018. 9. 17. 오오 12:58 Page 21

Pipe thickness Shear stress Tensile stress Bending moment Torque

mm inch (kN) (kgf) (kN) (kgf) (N.m) (kgf.m)(N.m) (kgf.m)

12.7 1/2 3.5 350 2.5 250 20 23 5 3.5

19.05 3/4 12 1200 2.5 250 20 2 115 11.5

25.4 1 11.2 1120 4 400 45 4.5 155 15.5

31.8 1 1/4 14.5 1450 6.5 650 87.5 8.75 265 26.5

38.1 1 1/2 16.5 1.7 9.5 0.95 155 16 350 35.5

50.8 2 21.5 2.2 13.5 1.4 255 26 600 61

Water pipe outlet

Water pipe connection

Water pipe inlet

Page 22

22 Outside Unit

Device protection unit

Strainer on water pipe

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 1 Picture 2

Picture 3

Picture 4

Page 23

Installation Manual 23

ENGLISH

Refrigerant piping system

Y branch method

Refrigerant piping system

Slave2

Slave1

Master

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).

MFL67705803 2018. 9. 17. 오오 12:58 Page 23

Page 24

Refrigerant piping system

24 Outside 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

Slave2

Slave1

Master

L 150m

40m

H 50 m

40m

DD D

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

L 150m(200m : Conditional application)

40m(90m : Conditional application)

H 50m

40m

* If it is conditionally installed, refer to (table 1).

MFL67705803 2018. 9. 17. 오오 12:58 Page 25

Page 26

26 Outside 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 6.35 Ø 12.7

< 16.0 Ø 9.52 Ø 15.88

≤ 23.0

Ø 9.52 Ø 19.05

< 33.0 Ø 9.52 Ø 22.2

< 47.0 Ø 12.7 Ø 28.58

< 71.0 Ø 15.88 Ø 28.58

< 104.0 Ø 19.05 Ø 34.9

< 174.0 Ø 19.05 Ø 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

Required Example

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.

40 m < B+C+D+e ≤ 90 m

→

Change B, C, and D pipe

diameter.

Ø6.35 → Ø9.52, Ø9.52 → Ø12.7, Ø12.7 → Ø15.88, Ø15.88 → Ø19.05, Ø19.05 → Ø22.2, Ø22.2 → Ø25.4, Ø25.4 → Ø28.58, Ø28.58 → Ø31.8, Ø31.8 → Ø34.9, Ø34.9 → Ø38.1

During the calculation of the total refrigerant pipe length, the above pipe length shall be calculated as twice.

A+Bx2+Cx2+

Dx2+a+b+c+d+e ≤ 500 m

The length from each indoor unit to the nearest branch pipe ≤ 40 m

a,b,c,d,e ≤ 40 m

Length from outdoor unit to the farthest indoor unit] – [Length from outdoor unit to the nearest indoor unit] ≤ 40 m

(A+B+C+D+e)-(A+a)

≤ 40 m

WARNING

To install maximum pipe length after the 1st branch exceeding 40 m and 90 m or less, the following conditions must be satisfied.

u (Table 1) Cautions during the installation of Maximum pipe length 90m after the 1st branch

Ú Refrigerant pipe diameter from outside unit to first branch. (A, E, F)

* If the step up size is not available, you can not select the next higher size available.

Upward Outside

unit

total capacity

Standard Pipe Diameter

Increased Pipe Diameter

When pipe length is 90m or more from

ODU to 1st branch

kW Liquid pipe[mm(inch)] Gas pipe[mm(inch)] Liquid pipe[mm(inch)] Gas pipe[mm(inch)]

28 Ø 9.52(3/8) Ø 22.2(7/8) Ø 12.7(1/2) Ø 25.4(1)

56 Ø 12.7(1/2) Ø 28.58(1-1/8) Ø 15.88(5/8) Ø 31.8(1-1/4)

84 Ø 19.05(3/4) Ø 34.9(1-3/8) Ø 22.2(7/8) Ø 38.1(1-1/2)

WARNING

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

H 50 m

40 m

Page 28

28 Outside 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)

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

Pipe inclination (2 or more)

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

Page 30

Refrigerant piping system

30 Outside 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

(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

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.

0.2m

Toward indoor unit Toward indoor unit

Oil Trap

(Example 3)

MFL67705803 2018. 9. 17. 오오 12:58 Page 31

Product Charge(kg)

Additional charge (kg)

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)

A B

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

32 Outside 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

)

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

)

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.

• Material: Seamless phosphorous deoxidized copper pipe

• Wall thickness : Comply with the relevant local and national regulations for the designed pressure

3.8MPa. We recommend the following table as the minimum wall thickness.

2. Commercially available piping often contains dust and other 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

MFL67705803 2018. 9. 17. 오오 12:58 Page 33

Page 34

34 Outside 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.

MFL67705803 2018. 9. 17. 오오 12:58 Page 34

Y branch

To Outside Unit

To Branch Piping or Indoor Unit

Horizontal plane

Within +/- 10°

Viewed from point A in direction of arrow

Tap e

(field supply)

Header

Insulator

(included with kit)

Liquid and gas pipe joints

Insulator for field piping

To outside unit

To indoor unit

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

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

36 Outside 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

B A C

Heat insulation material

Pipe

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

Bad example

pressure pipe together.

Heat

insulation

material

covering

Adhesive + Heat - resistant polyethylene foam + Adhesive tape

Indoor Vinyl tape

Outer

Floor exposed Outside

Water-proof hemp cloth + Bronze asphalt Water-proof hemp cloth + Zinc plate + Oily paint

Note: When using polyethylene cover as covering material, asphalt roofing shall not be required.

• Be sure to fully insulate connecting portion.

These parts are not insulated.

Power lines

Liquid pipe

Gas pipe

Power lines Finishing tape Insulating material

Transmission lines

Good example

Liquid pipe

Gas pipe

Power lines Insulating material

Transmission lines

Penetrations

Inner wall (concealed)

Floor (fireproofing)

Roof pipe shaft

Separation

Outer wall Outer wall (exposed)

Penetrating portion on fire

limit and boundary wall

Sleeve

1m1m

Heat insulating material Lagging

Caulking material Band Waterproofing layer Sleeve with edge Lagging material Mortar or other incombustible caulking Incombustible heat insulation material

When filling a gap with mortar, cover the penetration part with steel plate so that the insulation material will not be caved in. For this part, use incombustible materials for both insulation and covering.(Vinyl covering should not be used.)

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]

Models Gas pipe Liquid pipe

ARBLN01621

I.D19.05

O.D15.88

I.D12.7

I.D15.88

I.D12.7

I.D15.88

I.D12.7

292

281

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

ARBLN03321

I.D25.4

413

390

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

I.D22.2

I.D25.4

70 80 11 0

3 1 2

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

ARBLN07121

376 404

I.D34.9

O.D31.8

I.D22.2

O.D22.2

I.D28.58

I.D31.8

O.D19.05

I.D28.58

120 90 120

I.D31.8

2.22D.I

.5882D.I

I.D19.05

I.D15.88

I.D12.7

I.D19.05

I.D15.88

1 3

25.9D.I

25.9D.I7.21D.O

I.D15.88 I.D19.05

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

110 70

3 2

ARBLN14521

471 517

125

120 130

I.D19.05

I.D15.88

I.D12.7

I.D19.05

I.D22.2

I.D41.3

I.D38.1

I.D41.3

O.D34.9

I.D34.9

I.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

416 444

O.D15.88 I.D9.52

I.D12.7

O.D12.7 I.D6.35

I.D9.52

I.D15.88 I.D19.05

I.D22.2

I.D19.05

I.D15.88

I.D12.7

I.D15.88

I.D19.05

I.D22.2

O.D19.05

110 110

2 3 3

MFL67705803 2018. 9. 17. 오오 12:58 Page 37

Page 38

38 Outside 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

Gas pipe Liquid 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

ID12.7

120

ID9.52

120

ID9.52

120

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

ID6.35

ID9.52

720

ID6.35

ID9.52

700

60*9=540

ID6.35

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

Nitrogen gas cylinder

Gas pipe

Liquide pipe

Liquid side

Indoor unit

Gas side

Page 40

40 Outside 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

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

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 Unit Outside Unit

Indoor

Unit

Indoor

Unit

Remote control

Indoor

Unit

Indoor

Unit

Remote control

Outside UnitOutside Unit

Indoor

Unit

Indoor

Unit

Remote control

Indoor

Unit

Indoor

Unit

Remote control

Page 42

42 Outside 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 Cable Multi-Core Cable

Master Slave1 Slave2

Remote controller

Indoor

Unit

Indoor

Unit

Remote controller

Outside Unit

Remote controller

Indoor

Unit

Indoor

Unit

Master Slave1 Slave2

Outside Unit

Remote controller

Indoor

Unit

Indoor

Unit

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

• 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

• 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

44 Outside 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.

CAUTION

MFL67705803 2018. 9. 17. 오오 12:58 Page 44

3 Phase 4 Wires

Power supply

50Hz 380~415 V

60Hz 380 V

3phase 4lines power cable

Transmission cable(3lines): wired remote controller

Single phase 60Hz 220V

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

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)

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)

Outdoor Indoor

60Hz 460V 220V

MFL67705803 2018. 9. 17. 오오 12:58 Page 45

Page 46

Electrical Wiring

46 Outside Unit

n 3Ø, 380-415 V

Frequency

Voltage range(V)

Outdoor Indoor

60Hz 460V 220V

• 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.

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

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

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

48 Outside Unit

Dip switch setting

Mode Function Option Value 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

OFF ON

Selected the

option

- -

Change the

set value

Blank

Save in

EEPROM

Sol. Valve

200 V output

OFF ON

Selected the

option

- -

Change the

set value

Blank

Save in

EEPROM

Variable water flow

control

OFF ON

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

OFF ON

Selected the

option

- -

Change the

set value

Blank

Save in

EEPROM

IDU capacity

adjusting

OFF ON

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.

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

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

Example) 178 kW(62HP) 4Unit R410A combination (Cooling/heating switching type, 380V general type)

16 → 16 → 16 → 14 → 62 → 2 → 38 → 1

EX) Details of each symbol Model capacity

Symbol Number Contents

①

8~20 Master model capacity

②

10~20 Slave 1 capacity

③

10~20 Slave 2 capacity

④

10~20 Slave 3 capacity

⑤

8~80 Total capacity

⑥

1 Cooling only

Cooling/Heating

switching type

Simultaneous

Cooling/Heating type

⑦

38 380 V

46 460 V

22 220 V

⑧

1 General type

2 Tropical type

Capacity(kW) Capacity(HP)

Remark Refrigerant

23 8

Same

for master

/slave

R410A

29 10

35 12

41 14

46 16

52 18

57 20

CAUTION

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

50 Outside 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

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

NO Check the connections

Indoor address number is displayed on wired remote control or indoor unit display window. It is not an error message, will disappeared when on/off button is pressed on remote control ex) Display of 01, 02, ..., 15 means connection of 15 indoor units and Automatic addressing is completed normally.

of communication cable

Page 52

52 Outside 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

Page 53

Installation Manual 53

ENGLISH

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

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54 Outside Unit

Test Run

Precaution before test run

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

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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.

(Flow switch problem, arbitrary control, disconnection 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.)

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.)

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56 Outside 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)

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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

Display Title Cause of Error

0 1 - Air temperature sensor of indoor unit Air temperature sensor of indoor unit is open or short 0 2 - Inlet pipe temperature sensor of indoor unit Inlet pipe temperature sensor of indoor unit is open or short 0 3 -

Communication error : wired remote controller ÷ indoor unit

Failing to receive wired remote controller signal in indoor unit PCB 0 4 - Drain pump Malfunction of drain pump 0 5 -

Communication error : outdoor unit ÷ indoor unit

Failing to receive outdoor unit signal in indoor unit PCB 0 6 - Outlet pipe temperature sensor of indoor unit Outlet pipe temperature sensor of indoor unit is open or short

0 9 - Indoor EEPROM Error

In case when the serial number marked on EEPROM of Indoor unit

is 0 or FFFFFF

1 0 - Poor fan motor operation

Disconnecting the fan motor connector/Failure of indoor fan motor lock

1 7 - Inlet Air temperature sensor of FAU Air temperature sensor of indoor unit is open or short

2 1 *

Master outside unit inverter compressor IPM Fault

Master outside unit inverter compressor drive IPM error

2 2 *

Inverter Board Input Over Current(RMS) of Master outside Unit

Master Outside Unit Inverter Board Input Current excess (RMS)

2 3 *

Master outside unit inverter compressor DC link under-voltage

DC voltage is not charged after master outside unit operating relay is

turned on

2 4 * 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

2 5 *

Master outside unit input voltage overvoltage/under-voltage

Master outside unit input voltage over-voltage or under-voltage

2 6 *

Master outside unit inverter compressor operation failure error

Initial operation failure due to master outside unit inverter compressor error

2 8 *

Master outside unit inverter DC link over-voltage error

Compressor turned Off due to master outside unit inverter DC voltage

over-charge

2 9 *

Master outside unit inverter compressor overcurrent

Master outside unit inverter compressor error or operating component

(IPM) error operation

3 2 *

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

3 4 * 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

3 5 * Master outside unit low pressure over-drop.

Compressor turned off due to master outside unit low pressure overdrop. 3 6 *

Master Outside Unit Low Compression Ratio Limited Master Outside Unit stayed under low Compression limit for 3 minutes

3 9 *

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

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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 Error Oil 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 MICOMs Communication error between main MICOM and sub MICOM

58 Outside Unit

Test Run

Display Title Cause of Error

4 0 *

Master outside unit inverter compressor CT sensor error

Master outside unit inverter compressor current detection (CT) sensor

disconnection or short circuit

4 1 *

Master outside unit inverter compressor discharge temperature sensor error

Master outside unit inverter compressor discharge temperature sen-

sor disconnection or short circuit

4 2 * Master Outdoor Unit Low Pressure Sensor Fault Master Outdoor Unit Low Pressure Sensor open or short

4 3 * Master Outdoor Unit High Pressure Sensor Fault Master Outside Unit High Pressure Sensor open or short

4 4 * Master Outside unit air temperature sensor error

Master Outside unit air temperature sensor disconnection or short circuit

4 6 *

Master outside unit suction temperature sensor error

Master outside unit suction temperature sensor disconnection or

short circuit

4 9 *

Master outside unit IGBT temperature sensor error

Master out side unit IGBT temperature sensor disconnection or

short circuit

5 0 * Master outside unit 3 phase power missing Master outside unit power line phase missing

5 1 *

Over-capacity (Indoor unit capacity sum is excessive) connection

Excessive connection of indoor unit connection display value

(Different from outside unit)

5 2 *

Communication error with master outside unit in-

verter controller

When the inverter controller signal is not received from the master

outside unit inverter controller

5 3 *

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

5 7 *

Communication error between Master outside unit inverter controller

Failing to receive inverter contoroller signal at Master Outdoor Unit

controller

5 9 * Mixing Installation of Sub Outdoor Unit

Mixing Installation of Old Sub Outdoor Unit and New Slave Outdoor Unit

6 0 * Master outside unit inverter PCB EEPROM error Master outside unit inverter PCB EEPROM ACCESS error

6 2 * Master outside unit inverter IGBT over-rise error

Master outside unit inverter IGBT when the temperature rises above 110 ℃

6 5 *

Master outside unit inverter IGBT temperature sensor error

Master outside unit inverter IGBT temperature sensor disconnection

or short circuit

7 1 * PFC CT Sensor Error of Master Outdoor Unit Master Outdoor Unit PFC CT Sensor open or short

8 6 * Master outside unit master PCB EEPROM error

Communication error between master outside unit master MICOM

and EEPROM or EEPROM missing

8 8 * PFC PCB EEPROM error

Communication error between master outside unit master PFC and

EEPROM or EEPROM missing

Outside Unit related Error

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ENGLISH

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

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60 Outside 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.

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

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

side

Heat exchange

side

Closed type cooling tower

Page 62

62 Outside 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

(Freon gas weight per unit air volume) for facilitating calculation.

Limiting concentration: 0.44kg/m

(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.)

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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

)

Total amount of replenished refrigerant in refrigerant facility (kg)

Capacity of smallest room where indoor unit is installed (m

)

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

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Page 64

64 Outside 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)

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