LG ARNH04GK2A2 INSTALLATION INSTRUCTIONS

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

Hydro Kit (For Medium Temperature) Original instruction

INSTALLATION MANUAL

AIR CONDITIONER

[

Representative

] LG Electronics Inc. EU Representative : LG Electronics European Shared

Service Center B.V. Krijgsman 1, 1186 DM Amstelveen, The Netherlands

[Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu,

Changwon-si, Gyeongsangnam-do, KOREA

www.lg.com

MFL67086703

Rev.01_092520

ENGLISH

ITALIANO ESPAÑOL FRANÇAIS

DEUTSCH

PORTUGUÊS

NEDERLANDS

TABLE OF CONTENTS

3 SAFETY PRECAUTIONS

6 INSTALLATION PARTS

7 GENERAL INFORMATION

7 Model Information 8 General Information

9 INSTALLATION

9 Selection of the best location 9 Installation Space 10 Foundation for Installation 11 Water Piping and Water Circuit Connection 15 Sanitary Water Tank and Sanitary Water Tank Kit 17 Solar Thermal Kit 18 Installation Scenes 21 Refrigerant Piping 23 How to connect wirings 23 Wiring Connection 24 Connecting Cables

25 ACCESSORIES INSTALLATION

25 Location of Accessories and External Parts Connection 28 Main Pump Connection 28 Water tank temperature sensor Connection 29 Thermostat 34 Remote Temperature Sensor 35 3Way Valve 37 2Way Valve 38 Dry Contact 39 Independent Power Module

41 SYSTEM SET-UP

41 DIP Switch Setting 42 Group Control Setting 46 Installer Setting

53 TEST RUN

53 Caution before Operation Test 53 Operation Test of Water Pipe 54 Troubleshooting

Hydro Kit

Safety Precautions

ENGLISH

Safety Precautions

To prevent injury to the user or other people and property damage, the following instructions must be followed.

Be sure to read before installing the unit.

Be sure to observe the cautions specified here as they include important items related to safety.

Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications.

WARNING

CAUTION

n Meanings of symbols used in this manual are as shown below.

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

Installation

• Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.

- There is risk of fire or electric shock.

• For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized Service Center.

- There is risk of fire or electric shock.

• Always ground the unit.

- There is risk of fire or electric shock.

• Install the panel and the cover of control box securely.

- 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.

• Use the correctly rated breaker or fuse.

- There is risk of fire or electric.

• Do not modify or extend the power cable.

- There is risk of fire or electric shock.

• Do not install, remove, or reinstall the unit by yourself (customer).

- There is risk of fire, electric shock, explosion, or injury.

• For antifreeze, always contact the dealer or an authorized service center.

- Almost the antifreeze is a toxic product.

• The refrigerant of this product is R410A.

- The installation tool such as manifold gauge should be complied with R410A.

Hydro Kit

Installation Manual 3

Safety Precautions

• For installation, always contact the dealer or an Authorized Service Center.

- There is risk of fire, electric shock, explosion, or injury.

• Do not install the unit on a defective installation stand.

- It may cause injury, accident, or damage to the unit.

• Be sure the installation area does not deteriorate with age.

- If the base collapses, the unit could fall with it, causing property damage, unit failure, and personal injury.

• Do not install the unit outdoor.

- It may cause damage to the unit.

• Use a vacuum pump or inert (nitrogen) gas when doing leakage test or purging air. Do not compress air or oxygen and do not use flammable gases.

- There is the risk of death, injury, fire or explosion.

Operation

• Take care to ensure that power cable could not be pulled out or damaged during operation.

- There is risk of fire or electric shock.

• Do not place anything on the power cable.

- There is risk of fire or electric shock.

• Do not plug or unplug the power supply plug during operation.

- There is risk of fire or electric shock.

• Do not touch (operate) the unit with wet hands.

- There is risk of fire or electric shock.

• Do not place a heater or other appliances near the power cable.

- There is risk of fire or electric shock.

• Do not allow water to run into electric parts.

- There is risk of fire, failure of the unit, or electric shock.

• Do not store or use flammable gas or combustibles near the unit.

- There is risk of fire or failure of unit.

• Do not use the unit in a tightly closed space for a long time.

- It may cause damage to the unit.

• When flammable gas leaks, turn off the gas and open a window for ventilation before turning the unit on.

- There is risk of explosion or fire.

• If strange sounds, or small or smoke comes from unit, turn the breaker off or disconnect the power supply cable.

- There is risk of electric shock or fire.

• Stop operation and close the window in storm or hurricane. If possible, remove the unit from the window before the hurricane arrives.

- There is risk of property damage, failure of unit, or electric shock.

• Do not open the front cover of the unit while operation. (Do not touch the electrostatic filter, if the unit is so equipped.)

- There is risk of physical injury, electric shock, or unit failure.

• When the unit is soaked (flooded or submerged), contact an Authorized Service Center.

- There is risk of fire or electric shock.

Hydro Kit

Safety Precautions

• Be cautious that water could not be poured to the unit directly.

- There is risk of fire, electric shock, or unit damage.

• Ventilate the unit from time to time when operating it together with a stove, etc.

- There is risk of fire or electric shock.

• Turn the main power off when cleaning or maintaining the unit.

- There is risk of electric shock.

• Take care to ensure that nobody could step on or fall onto the unit.

- This could result in personal injury and unit damage.

• For installation, always contact the dealer or an Authorized Service Center.

- There is risk of fire, electric shock, explosion, or injury.

• If the unit is not used for long time, we strongly recommend not to switch off the power supply to the unit.

- There is risk of water freezing.

CAUTION

Installation

• Always check for gas (refrigerant) leakage after installation or repair of unit.

- Low refrigerant levels may cause failure of unit.

• Keep level even when installing the unit.

- To avoid vibration or water leakage.

• Use two or more people to lift and transport the unit.

- Avoid personal injury.

ENGLISH

Operation

• Do not lay on the cooled floor for long time when the unit is in cooling operation.

- This could harm to your health.

• Do not use the unit for special purposes, such as preserving foods, works of art, etc.

- There is risk of damage or loss of property.

• Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.

- There is risk of fire, electric shock, or damage to the plastic parts of the unit.

• Do not step on or put anything on the unit.

- There is risk of personal injury and failure of unit.

• Use a firm stool or ladder when cleaning or maintaining the unit.

- Be careful and avoid personal injury.

• Do not unplug the power supply plug of Hydro Kit when stopping Hydro Kit operation. Always turn Hydro Kit off, using the wired remote controller.

- A plate heat exchanger burst may happen because of disconnection of communication

between Hydro Kit and the outdoor unit.

• Means for disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.

Hydro Kit

Installation Manual 5

Installation Parts

Thank you for choosing LG Electronics

Hydro Kit

Before starting installation, please make it sure that all parts are found inside the unit box.

Item Image Quantity

ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

INSTALLATION MANUAL

AIR

Installation Manual

Owner's Manual 1

CONDITIONER

Hydro Kit (For Medium Temperature)

Original instruction

P/NO : MFL67086703

OWNER’S MANUAL

AIR CONDITIONER

Please read this manual carefully before operating your set and retain it for future reference.

TYPE : Hydro Kit (For High Temperature)

P/NO : MFL67212703

Remote Cotroller

/ Cable

PORTUGUESE

NEDERLANDS

www.lg.com

ENGLISH ITALIANOESPAÑOL

FRANÇAIS

DEUTSCH

ΕΛΛΗΝΙΚΆ

PORTUGUÊS

NEDERLANDS

POLSKI

MAGYAR

www.lg.com

Sensor Holder 1

Water Tank Temperature

Sensor

Strainer 1

Independent

Power Module

Hydro Kit

General Information

ENGLISH

With advanced inverter technology, and hot water generation. By Interfacing to various accessories user can customize the range of the application.

Hydro Kit

is suitable for applications like under floor heating,

Model Information

Model name and related information

Type

Model Unit

Power Supply Ø, V, Hz

Cooling

Capacity

Heating

Net Weight kg(lbs)

Noise Level dB

*1 : Tested under Eurovent Heating condition (water temperature 30 °C(86 °F) → 35 °C(95 °F) at

outdoor ambient temperature 7 °C(44 °F) / 6 °C(42 °F))

*2 : Tested under Eurovent Cooling condition (water temperature 23 °C(73 °F) → 18 °C(64 °F) at

outdoor ambient temperature 35 °C(95 °F) / 24 °C(75 °F))

kcal/h

Btu/h

kcal/h

Btu/h

ARNH10GK2A2 ARNH04GK2A2

28 12.3

24 100 10 580

95 900 42 000

31.5 13.8

27 100 11 870

107 500 47 000

35(77) 30.4(67)

Hydro Kit

1, 220~240, 50

Hydro Kit

Installation Manual 7

General Information

To extend the functionality of , there are various external auxiliary apparatus called as "accessories".

They are classified by "accessories" and "3rd party accessories" according to the manufacturer. Accessories are presented LG Electronics, and 3rd party accessories are presented by related manufacturers.

Hydro Kit

Accessories supported by LG Electronics

Item Purpose Model

Remote Air Sensor To control the unit by air temperature PQRSTA0

Dry Contact To receive on & off external signal PQDSA

Solar Thermal Kit To operate with sanitary water tank PHLLA

Accessories supported by 3rdparty Companies

Item Purpose Specification

Solar

Thermal System

Thermostat To control the unit by air temperature

3way valve

and actuator

2way valve

and actuator

To generate auxiliary

heating energy for water tank

(1~ 230 V or 1~ 24 V) Cooling/Heating type

To control water flow for hot water

heating or floor heating

To control water flow for

Fan Coil Unit

3 wire, SPDT (Single Pole Double Throw)

Heating-Only type

(1~ 230 V or 1~ 24 V AC

with Mode selection switch)

type, 1~ 230 V

2 wire, NO(Normal Open) or NC

(Normal Closed) type, 1~ 230 V

Hydro Kit

Installation

Selection of the best location

1. Select space for installing the unit, which will meet the following conditions:

The place where the unit shall be installed inside. The place shall easily bear a load exceeding four times of the unit weight. The place where the unit shall be leveled. The place shall allow easy water drainage. The place where the unit shall be connected to the outdoor unit. The place where the unit is not affected by an electrical noise. The place where there should not be any heat source or steam near the unit.

Installation Space

• The following values are the least space for installation. If any service area is needed for service according to field circumstance, obtain enough service space.

• The unit of values is mm(inch).

520(20-17/36) 400(15-3/4)

Product

Piping space

(front side)

space

330(13)

(Unit: mm(inch))

100(3-15/16)

ENGLISH

Service space

(front side)

600(23-5/8)

(Unit: mm(inch))

space

H-Beam supporter

Hydro Kit

631(24-16/19)631(24-16/19)

100(3-15/16) 100(3-15/16)

100(3-15/16)

200(7-7/8)

Installation Manual 9

Installation

Foundation for Installation

• Fix the unit tightly with bolts as shown below so that the unit will not fall down due to earthquake.

• Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part depending on installation status. Thus, use anti-vibration materials (cushion pad) fully (The base pad shall be more than 200 mm (7-7/8 inch)).

Anti-vibration material

75(2-15/16)

340(13-3/8)

Concrete

base

Support

3 or more screw threads of the 2 bolts must be shown

Nut

Spring washer

Flat washer Anchor bolt

392(15-7/16)

(Unit: mm(inch))

Drain pipe connection

Hydro Kit

- Do not install in upward direction.

- Install the drain pipe in downward direction (1/50-1/100).

Hydro Kit

does not use the drain pump.

drain connection pipe is PT 1.

Hydro kit Hydro kit

Hydro Kit

Installation

ENGLISH

Water Piping and Water Circuit Connection

General Considerations

Followings should be considered before beginning water circuit connection.

• Service space should be secured.

• Water pipes and connections should be cleaned using water.

• Space for installing external water pump should be provided.

• Never connect electric power while proceeding water charging.

Water Piping and Water Circuit Connection

While installing water pipes, followings should be considered :

While inserting or putting water pipes, close the end of the pipe with pipe cap to avoid dust entering.

•

• When cutting or welding the pipe, always be careful that inner section of the pipe should not be defective. For example, no weldments or no burrs are found inside the pipe.

• Pipe fittings (e.g. L-shape elbow, T-shape tee, diameter reducer, etc) should be tightened strongly to be free from water leakage.

• Connected sections should be leakage-proof treatment by applying tefron tape, rubber bushing, sealant solution, etc.

Appropriate tools and tooling methods should be applied to prevent mechanical breakage of the connections.

•

• Operation time of flow valve(e.g. 3way valve or 2way valve) should be less than 90 seconds.

• Pipe is insulated to prevent heat loss to external environment.

Hydro Kit

Installation Manual 11

Installation

Water cycle

* For the water pipe system, use the closed loop type.

1. For the parts of the water pipe system, use the parts above the design water pressure.

2. For the water pipe, do not use steel pipe.

3. For the drain pipe (1) size, use the same diameter as the product connected or larger.

- Always install a natural drainage so that the drained water does not back flows.

4. To replace the connected device easily, install the union joint (2). Install the service port (3) to clean the heat exchanger at each inlet and outlet of the water pipe.

6. Always install a strainer(4) at the inlet of the water pipe. Do not enter city water into the water pipe directly during Hydro Kit operation. If the strainer is not installed, component malfunction of Hydro Kit may occur.

- For the strainer, use one with 50 mesh or above with measurement diameter of 0.4mm or

less. (Exclude other net)

- Always install the strainer on the horizontal pipe.

(When dirt, trash, rusted pieces get into the water pipe system, it can cause problems to the product by corroding the metallic material.)

7. Install the air vent(5) at the top of the water pipe. If the air vent is not installed at the top of the water pipe, there would be a lot of bubble in the water pipe. So a plate heat exchanger burst may happen because of the reduction of water flow rate(CH 14 is displayed in the remote controller) caused by a lot of bubble in the water pipe.

8. Install a thermometer (6) and pressure gauge (7) at the inlet and outlet of the water pipe.

9. Install the drain valve (8) that can be used for draining the water inside when replacing the part or providing service.

10. Install the shut-off valve (9) to block the water by closing the valve when replacing the part or

cleaning.

11. Apply insulated treatment on the exterior of the water pipe so that water drops do not form.

12. Install excessive pressure safety valve (10) that meets the design water pressure to prevent unit

or water pipe damage at the pressure increase inside the water pipe system.

13. Install the closed loop water pipe system.

On-site installation

air vent (5)

Union joint (2)

Hydro kit

Pressure gauge (7)

Thermometer (6)

Shut-off valve (9)

Excessive pressure

safety valve(10)

Outlet Water

[Install water tank]

[Install floor cooling/heating]

Inlet water

Drain pipe (1)

CAUTION

P/T service port (3)

Strainer (4)

Drain valve (8)

Please always make circulate or drain out the water completely when not using it.

Hydro Kit

Installation

* WATER TANK & FLOOR HEATING INSTALLATION

ENGLISH

1. Use the pump (1) with sufficient capacity to assure loss of overall water pressure and to supply water to the

Hydro Kit.

2. Install the shut-off valve (2) on both sides of the pump to clean and repair the pump.

3. Install the flexible joint (3) to prevent noise and vibration transferred from the pump.

4. Install the pressure gauge (4) to monitor the water pressure from water tank. (Option)

5. Install the expansion tank (5) to accommodate the water contracted or expanded from the temperature difference and to supply the water.

6. After the installation of water pipe system is completed, open the water supply valve (6) and supply the water.

7. When installing the water tank, insert the water tank temperature sensor (7) to measure the temperature of the water inside the tank.

- For the water tank temperature sensor, use the sensor supplied on the product.

- When heating the floor, measure the temperature by using the remote controller or remote

temperature sensor (Separately sold).

8. Use the water tank (9) with the heat exchange coil (8) installed so that the heat can be exchanged sufficiently inside the tank.

Installation of water tank

shut-off valve (2)

Pump (1)

Flexible joint (3)

Installation of floor heating

shut-off valve (2)

Pump (1)

Flexible joint (3)

water tank temperature sensor (7)

Expansion tank (5)

Pressure gauge (4)

Water supply valve (6)

Expansion tank (5)

Pressure gauge (4)

Water supply valve (6)

Heat

exchange

coil (8)

water tank (9)

(Indirect heating type)

Floor heating coil (Radiator, FCU can be used)

Hydro Kit

Installation Manual 13

Installation

Strainer

- Use the 50 mesh strainer.

(Exclude scale diameter of 0.4mm or less and other net)

- Check the strainer direction and assemble on the inlet hole (Refer to picture)

- Wrap the Teflon tape on the screw thread of the water pipe for more than 15 times for assembly.

- Install the service port facing downward. (Within left/right 45 degrees)

- Check if there is any leakage on the connecting part.

- Clean the strainer periodically. (Once a year or more frequent)

Water In

Front

45°

Strainer

Side

Hydro Kit

Installation

PT 1/2 inch

Process PT 1/2 inch

female bolt

Inside water tank

Water tank outer wall

Water Tank Temperature Sensor

Sensor holder

Sanitary water

(DHW) tank

Water Tank Temperature Sensor

Water In

Water Out

ENGLISH

Sanitary Water Tank and Sanitary Water Tank Kit

Installation Condition

Installing sanitary water (DHW) tank requires following considerations :

• Sanitary water tank should be located at the flat place.

• Water quality should comply with EN 98/83 EC Directives.

• As this water tank is sanitary water tank (indirect heat exchange), do not use anti water-freezing treatment like ethylene grycol.

• It is highly recommend to wash out inside of the sanitary water tank after installation. It ensures generating clean hot water.

• Near the sanitary water (DHW) tank , there should be water supply and water drain for easy access and maintenance.

* DHW : Domestic Hot Water

Water tank temperature sensor connection

• If hot water mode is used, make sure to install sensor to water tank.

• Make PT 15 A female bolt hole in the water tank, and install sensor in the water tank.

• Push the sensor into the hole of the sensor holder cap.

• Lock the sensor holder cap.

Hydro Kit

Installation Manual 15

Installation

WARNING

Installing recirculation pump

When Hydro Kit is used with the sanitary water tank, it is STRONGLY recommended to install recirculation pump to prevent cold water at the end of hot water supply flooding out and to stabilize the water temperature inside the sanitary water tank.

- The recirculation pump should be operated when sanitary water demand is not required. Therefore, external time scheduler to determine when the recirculation pump should turn on and turn off is required.

- The operating duration time of the recirculation pump is calculated as follow : Duration time [minute] = k * V / R

k : 1.2 ~ 1.5 is recommended.

(If distance between pump and tank is far, then choose high number.) V : Volume of sanitary water tank [liter] R : Water flow rate of pump [liter per minute], which is determined by pump performance

curve.

- The pump operating start time should be prior to the sanitary water demand.

Hot water supply

Shower (End of Hot water supply)

Hydro Kit

Water Out

Water In

Sanitary water

(DHW) tank

Recirculation Pump

External

Time Scheduler

City water

Installation

Solar

Thermal

System

(Field Supply)

Solar

Collector

(Field Supply)

Water Tank

Water Tank Sensor

(less than 5 meter)

Solar Thermal Sensor

(less than 5 meter)

Water In

Water Out

Water In

3way valve (Field Supply)

Pump

(Field Supply)

Solar Thermal Kit

How to Install Solar Thermal Kit

Step 1. Check the diameter of pre-installed pipes. (symbol Ⓐ and Ⓑ)

Step 2. If the diameter of pre-installed pipes is different from diameter of solar thermal kit, it is

necessary to reduce or extend of pipe’s diameter.

Step 3. After Step 2., connect the pipe and solar thermal kit.

Step 4. Connect solar thermal sensor to ‘CN_TH4’(Red connector) of the indoor unit PCB.

If the water tank sensor is connected, disconnect the sensor from PCB first.

ENGLISH

Hydro Kit

Installation Manual 17

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