LG ARNH08GK3A2 Installation Manual

www.lg.com

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

P/NO : MFL67798132

Original instruction

Hydro Kit (For High Temperature)

Hydro Kit

Installation Manual

TABLE OF CONTENTS

1. SAFETY PRECAUTIONS..............................................................................................................3

2. INSTALLATION PARTS ...............................................................................................................6

3. GENERAL INFORMATION ...........................................................................................................7

MODEL INFORMATION................................................................................................................7

4. INSTALLATION.............................................................................................................................8

TRANSPORTING THE UNIT ........................................................................................................8

SELECTION OF THE BEST LOCATION ......................................................................................9

INSTALLATION SPACE ................................................................................................................9

FOUNDATION FOR INSTALLATION ..........................................................................................10

WATER PIPING AND WATER CIRCUIT CONNECTION ............................................................11

SANITARY WATER TANK AND SANITARY WATER TANK KIT .................................................14

INSTALLATION SCENES ...........................................................................................................16

REFRIGERANT PIPING .............................................................................................................18

HOW TO CONNECT WIRINGS..................................................................................................20

WIRING CONNECTION..............................................................................................................20

CONNECTING CABLES.............................................................................................................21

5. ACCESSORIES INSTALLATION................................................................................................22

LOCATION OF ACCESSORIES AND EXTERNAL PARTS CONNECTION ...............................22

MAIN PUMP CONNECTION.......................................................................................................25

WATER TANK TEMPERATURE SENSOR CONNECTION ........................................................25

THERMOSTAT............................................................................................................................26

REMOTE TEMPERATURE SENSOR.........................................................................................29

3WAY VALVE ..............................................................................................................................30

DRY CONTACT...........................................................................................................................32

6. SYSTEM SET-UP........................................................................................................................33

DIP SWITCH SETTING...............................................................................................................33

GROUP CONTROL SETTING....................................................................................................34

INSTALLER SETTING ................................................................................................................38

7. TEST RUN...................................................................................................................................46

CAUTION BEFORE OPERATION TEST ....................................................................................46

OPERATION TEST OF WATER PIPE ........................................................................................46

TROUBLESHOOTING ................................................................................................................47

2

Hydro Kit

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 unit is R134a and
the unit is connected to the outdoor unit
where R410A refrigerant is used.

•

The installation tool such as manifold
gauge should comply with R410A.

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.

Safety Precautions

1. Safety Precautions

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

n

Be sure to read before installing the unit.

n

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

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.

WARNING

n Installation

Be sure not to do.

Be sure to follow the instruction.

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.

Hydro Kit Installation Manual 3

Safety Precautions

n 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.

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.

4

Hydro Kit

Do not install the unit outside.

• 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.

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 water pipe system as
Open loop type.

• It may cause failure of unit.

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.

Hydro Kit Installation Manual 5

n 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.

Safety Precautions

n Operation

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.

CAUTION

Installation Parts

6

Hydro Kit

2. 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

Installation Manual

1

Owner's Manual 1

Remote Controller

/ Cable

1

Sensor Holder 1

Water Tank

Temperature Sensor

1

Strainer 1

OWNER’S MANUAL

AIR CONDITIONER

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

P/NO : MFL67212703

www.lg.com

TYPE :

Hydro Kit (For High Temperature)

ENGLISH

ITALIANO ESPAÑOL FRANÇAIS DEUTSCH

INSTALLATION MANUAL

AIR
CONDITIONER

Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
Please retain this installation manual for future reference after reading it
thoroughly.

Hydro Kit (For High Temperature)

Original instruction

P/NO : MFL67798102

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

www.lg.com

General Information

3. General Information

Model Information

With advanced inverter technology, Hydro Kit is suitable for applications like under floor heat­ing, and hot water generation. By Interfacing to various accessories user can customize the range
of the application.

Hydro Kit Installation Manual 7

Model name and related information

*1 : Tested under Eurovent Heating condition

(Water temperature 55℃(131℉) → 65 ℃(149 ℉) at outdoor ambient temperature
7℃(44℉) / 6℃(42℉))

Type

Hydro Kit

(For High Temperature)

Model Unit

Power Supply Ø, V, Hz

Capacity Heating

kW

kcal/h

Btu/h

Net Weight kg(lbs)

Refrigerant

Type

Quantity kg(lbs)

Noise Level dB

ARNH08GK3A2 ARNH04GK3A2

1, 220-240, 50

25 13.8

21500 11870

85300 47000

94(207) 88(194)

R134a

3(6.61) 2.3(5.07)

43

8

Hydro Kit

Installation

4. Installation

Transporting the Unit

• When carrying the suspended unit, pass the ropes between legs of base panel under the unit.

• Always lift the unit with ropes attached at 6 points so that impact is not applied to the unit.

• Attach the ropes to the unit at an angle Ⓐ of 40° or less.

• Use only accessories and parts which are of the designated specification when installing.

CAUTION

Be very careful while carrying the unit.

- Do not have only one person carry the unit if it is more than 20 kg (44.1 lbs).

- PP bands are used to pack some products. Do not use them as a mean for transportation because
they are dangerous.

- Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic pack­aging bag may suffocate children to death.

- When carrying the unit, be sure to support it at 6-points. Carrying and lifting the unit with 4-point
support may make it unstable, resulting in a fall.

Sub line

40º or less

Line supporter

Installation

Hydro Kit Installation Manual 9

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.

Service space

(left side)

Service space

(front side)

400520300

Piping space

(front side)

(Unit: mm)

330

600

space

Anti Vibration
material

space

H-Beam supporter

Concrete supporter

(Unit: mm)

100100100100

10801080

200

Installation

10

Hydro Kit

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

354

Concrete

base

Support

75

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

Nut

Spring washer

Flat washer
Anchor bolt

392

(Unit: mm)

Installation

Hydro Kit Installation Manual 11

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) should be less than 90 seconds.

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

Water Piping and Water Circuit Connection

Installation

12

Hydro Kit

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. To replace the connected device easily, install the union joint (2).

4.

Install the service port (3) to clean the heat exchanger at each inlet and outlet of the water pipe.

5. Always install a strainer (4) at the inlet of the water pipe.

- 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.)

6. Install the air vent (5) at the top of the water pipe.

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

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

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

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

11. 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.

12. There is a drain hole at the bottom of the Hydro Kit to prevent risk of electric shock caused by

leakage of water.

Hydro kit

(For High Temperature)

On-site installation (1)

Air vent (5)

Union joint (2) Thermometer (6) Excessive pressure

Pressure gauge(7) Shut-off valve (9)

safety valve(10)

Outlet Water

Inlet water

Drain valve(8)Strainer(4)P/T Service port(3)

[Install water tank]

or

[Install floor heating]

Installation

Hydro Kit Installation Manual 13

* Water tank & Floor heating installation

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 tem-

perature 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

Installation of floor heating

water tank
temperature sensor (7)

shut-off valve (2)

Expansion tank (5)

Heat

exchange

coil (8)

Pump (1)

Flexible joint (3)

shut-off valve (2)

Pump (1)

Flexible joint (3)

Pressure gauge (4)

Water supply valve (6)

Expansion tank (5)

Pressure gauge (4)

Water supply valve (6)

water tank (9)

(Indirect heating type)

Floor heating coil
(Radiator, FCU can be used)

Installation Condition

Installing sanitary water 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 tank, there should be water supply and water drain for easy access and
maintenance.

Sanitary Water Tank and Sanitary Water Tank Kit

Sanitary

Water Tank

Water Tank

Temperature Sensor

Water In

Water Out

Installation

14

Hydro Kit

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

Strainer

Front Side

45°

Installation

Hydro Kit Installation Manual 15

PT 1/2 inch

Process PT 1/2 inch

female bolt

Inside water tank

Water tank outer wall

Water Tank

Temperature Sensor

Sensor
holder

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

• Make PT15A 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.

Water tank temperature sensor connection

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.

Water Out

Water In

Hot water supply

Sanitary

Water Tank

Shower
(End of Hot
water supply)

Recirculation
Pump

External

Time Scheduler

City water