LG HM123M 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.

Air-to-Water Heat Pump

Original instruction [

Representative

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

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

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

Changwon-si, Gyeongsangnam-do, KOREA

For more information, Refer to the CD or LG Web site (www.lg.com).

INSTALLATION MANUAL

AIR CONDITIONER

P/NO : MFL68026603

ENGLISH

ITALIANO ESPAÑOL

FRANÇAIS

DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

2 Air-to-Water Heat Pump

Air-to-Water Heat Pump Installation Manual

TABLE OF CONTENTS

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

2. INSTALLATION PARTS ................................................................................................................8

3. GENERAL INFORMATION ..........................................................................................................9

MODEL INFORMATION................................................................................................................9

COMPONENTS ..........................................................................................................................10

ACCESSORIES ..........................................................................................................................13

4. INSTALLATION...........................................................................................................................15

TRANSPORTING THE UNIT ......................................................................................................15

SELECTION OF THE BEST LOCATION ....................................................................................16

INSTALLATION CONDITIONS....................................................................................................17

INSTALLATION AT SEASIDE......................................................................................................18

SEASONAL WIND AND CAUTIONS IN WINTER.......................................................................18

FOUNDATION FOR INSTALLATION ..........................................................................................19

INSTALLATION SCENES ...........................................................................................................20

WATER PIPING AND WATER CIRCUIT CONNECTION ............................................................23

WATER VOLUME AND EXPANSION VESSEL PRESSURE......................................................27

ELECTRICAL WIRING................................................................................................................28

CONNECTING CABLES.............................................................................................................30

WIRING OF MAIN POWER SUPPLY AND EQUIPMENT CAPACITY ........................................35

WATER CHARGING ...................................................................................................................36

INSTALLATION OF THE FINAL CHECK ....................................................................................37

5. ACCESSORIES INSTALLATION................................................................................................38

INSTALLATION OF REMOTE CONTROLLER ...........................................................................38

THERMOSTAT............................................................................................................................40

SANITARY WATER TANK AND SANITARY WATER TANK KIT .................................................44

DRY CONTACT...........................................................................................................................47

REMOTE TEMPERATURE SENSOR.........................................................................................48

3WAY VALVE ..............................................................................................................................49

AIR-VENT ...................................................................................................................................50

2WAY VALVE ..............................................................................................................................51

6. SYSTEM SET-UP........................................................................................................................52

DIP SWITCH SETTING...............................................................................................................52

INSTALLER SETTING ................................................................................................................56

7. CHECK POINTS, MAINTENANCE AND TROUBLESHOOTING ..............................................71

CHECK LIST BEFORE STARTING OPERATION......................................................................71

MAINTENANCE ..........................................................................................................................72

TEST RUN ..................................................................................................................................72

AIRBORNE NOISE EMISSION ..................................................................................................73

LIMITING CONCENTRATION ....................................................................................................73

VACUUM & CHARGE OF REFRIGERANT ................................................................................74

TROUBLESHOOTING ................................................................................................................77

Safety Precautions

Installation Manual 3

ENGLISH

1. 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.

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

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.

4 Air-to-Water Heat Pump

Safety Precautions

Do not install the water pipe system as Open loop type.

• It may cause failure of 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.

Make sure the connected condition of connector in product after maintenance.

• Otherwise, it may cause product damage.

Do not touch leaked refrigerant directly.

• There is risk of frostbite.

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.

n Operation

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 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.

Safety Precautions

Installation Manual 5

ENGLISH

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.

Do not touch any electric part with wet hands. you should be power off before touching electric part.

• There is risk of electric shock or fire.

Do not touch refrigerant pipe and water pipe or any internal parts while the unit is operating or immediately after operation.

• There is risk of burns or frostbite, personal injury.

If you touch the pipe or internal parts, you should be wear protection or wait time to return to normal temperature.

• Otherwise , it may cause burns or frostbite, personal injury.

6 Air-to-Water Heat Pump

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.

Be careful that some part of the control box are hot.

• There is risk of physical injury or burns.

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.

Turn the main power on 6 hours ago before the product starting operation.

• Otherwise, it may cause compressor damage.

Do not touch electric parts for 10 minutes after main power off.

• There is risk of physical injury, electric shock.

The inside heater of product may operate during stop mode. It is intended to protect the product.

Safety Precautions

Installation Manual 7

ENGLISH

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.

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.

CAUTION

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

• Be careful and avoid personal injury.

Do not turn on the breaker or power under condition that front panel, cabinet, top cover, control box cover are removed or opened.

• Otherwise, it may cause fire, electric shock, explosion or death.

Safety Precautions

Installation Parts

8 Air-to-Water Heat Pump

2. Installation Parts

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

Item Image Quantity

Installation Manual

Owner's Manual 1

Remote Controller 1

Cable 1

ENGLISH

ITALIANO ESPAÑOL

INSTALLATION MANUAL

AIR CONDITIONER

Air-to-Water Heat Pump

Original instruction

P/NO : MFL68026603

OWNER’S MANUAL

AIR CONDITIONER

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

Air-to-Water Heat Pump (For High Temperature)

P/NO : MFL67212706

FRANÇAIS

DEUTSCH

ΕΛΛΗΝΙΚΆ

ČEŠTINA

NEDERLANDS

POLSKI

LIMBA ROMÂNĂ

www.lg.com

ENGLISH FRANÇAIS

ΕΛΛΗΝΙΚΆ

PORTUGUÊS

www.lg.com

Installation Manual 9

ENGLISH

General Information

3. General Information

Model Information

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

In this chapter, general information of is presented to identify the installation procedure. Before beginning installation, read this chapter carefully and find helpful information on installation.

Model name and related information

* : tested under Eurovent Heating condition (inlet Water temperature 30 °C ’ 35 °C at outdoor

ambient temperature 7 °C DB/ 6 °C WB)

** : tested under Eurovent Cooling condition (inlet Water temperature 23 °C ’ 18 °C at outdoor

ambient temperature 36 °C DB/ 24 °C WB)

Unit

Capacity

Power Source (Unit) Chassis

Heating (kW)* Cooling (kW)**

AHBW056A0 4.99 4.99 220-240 V~ 50 Hz UN4

AHBW076A0 7.00 7.00 220-240 V~ 50 Hz UN4

AHBW096A0 9.00 9.00 220-240 V~ 50 Hz UN4

AHBW126A0 12.00 14.50 220-240 V~ 50 Hz UN3

AHBW146A0 14.00 15.50 220-240 V~ 50 Hz UN3

AHBW166A0 16.00 16.10 220-240 V~ 50 Hz UN3

AHBW128A0 12.00 14.50 380·415 V ~50 Hz UN3

AHBW148A0 14.00 15.50 380·415 V ~50 Hz UN3

AHBW168A0 16.00 16.10 380·415 V ~50 Hz UN3

General Information

10 Air-to-Water Heat Pump

Components

Description

No Name Remarks

1 Entering water pipe PT 25.4mm(Female type) 2 Leaving water pipe PT 25.4mm(Female type) 3 Strainer Filtering and stacking particles inside circulating water 4 Electronic heater Providing additional heating capacity to the water circuit 5 Control box PCB and terminal blocks 6 Plate heat exchanger Heat exchange between refrigerant and water 7 Water pump Circulating the water 8 Pressure gage Indicates circulating water pressure

9 Safety valve Open at water pressure 3 bar 10 Expansion vassel Protecting components from water pressure 11

Main PCB assembly(Inverter)

This PCB controls the cycle parts of the unit

Main PCB assembly(Heater)

This PCB controls the functioning of the unit

AHBW056A0/AHBW076A0/AHBW096A0

9 8

1 2

General Information

Installation Manual 11

ENGLISH

Description

No Name Remarks

9 Safety valve Open at water pressure 3 bar 10 Expansion vassel Protecting components from water pressure 11

Main PCB assembly(Inverter)

This PCB controls the cycle parts of the unit

Main PCB assembly(Heater)

This PCB controls the functioning of the unit

AHBW126A0/AHBW146A0/AHBW166A0

1 2

General Information

12 Air-to-Water Heat Pump

Description

No Name Remarks

9 Safety valve Open at water pressure 3 bar 10 Expansion vassel Protecting components from water pressure 11

Main PCB assembly(Inverter)

This PCB controls the cycle parts of the unit

Main PCB assembly(Heater)

This PCB controls the functioning of the unit

AHBW128A0/AHBW148A0/AHBW168A0

1 2

General Information

Installation Manual 13

ENGLISH

Accessories

Accessories supported by LG Electronics

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

They are classified by "accessories" and "3

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

Item Purpose

Model

Sanitary water tank kit

To operate with

sanitary water tank

PHLTB

Remote air sensor

To control by air

temperature

PQRSTA0

Dry contact

To receive on & off

external signal

PQDSA

Sanitary water tank

To generate and store

hot water

PHS02060310 : 200 liter, Single heating

coil, 230 V~ 50 Hz 3 kW Electric heater

PHS02060320 : 200 liter, Double heating

coil, 230 V~ 50 Hz 3 kW Electric heater

PHS03060310 : 300 liter, Single heating

coil, 230 V~ 50 Hz 3 kW Electric heater

PHS03060320 : 300 liter, Double heating

coil, 230 V~ 50 Hz 3 kW Electric heater

General Information

14 Air-to-Water Heat Pump

Accessories supported by 3rdparty Companies

Item Purpose Specification

Thermostat To control by air temperature

Heating-Only type (230 V~)

Cooling / Heating type

(230 V~ with

mode selection switch)

3way valve and

actuator

To control water flow for hot

water heating or floor heating

3 wire, SPDT (Single Pole

Double Throw) type, 230 V~

2way valve and

actuator

To control water flow

for Fan Coil Unit

2 wire,NO(Normal Open)

or NC(Normal Closed)

type, 230 V~

Solar Heating System

To generate auxillary

heating energy for water tank

Installation

Installation Manual 15

ENGLISH

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 four 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.

Sub line

40º or less

Locking points for

transportation ropes

Air outlet grille Intake hole

Always hold the unit by the corners, as holding it by the side intake holes on the casing may cause them to deform.

Corner

Handle

Forklift

Installation

16 Air-to-Water Heat Pump

Selection of The Best Location

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

• No direct thermal radiation from other heat sources

• No possibility of annoying neighbors by noise from unit

• No exposition to strong wind

• With strength which bears weight of unit

• Note that drain flows out of unit when heating

• With space for air passage and service work shown next

• Because of the possibility of fire, do not install unit to the space where generation, inflow, stagnation, and leakage of combustible gas is expected.

• Avoid unit installation in a place where acidic solution and spray (sulfur) are often used.

• Do not use unit under any special environment where oil, steam and sulfuric gas exist.

• It is recommended to fence round the unit in order to prevent any person or animal from accessing the unit.

• If installation site is area of heavy snowfall, then the following directions should be observed.

- Make the foundation as high as possible.

- Fit a snow protection hood.

2. Select installation location considering following conditions to avoid bad condition when additionally performing defrost operation.

• Install the unit at a place well ventilated and having a lot of sunshine in case of installing the

product at a place with a high humidity in winter (near beach, coast, lake, etc). (Ex) Rooftop where sunshine always shines.

• Performance of heating will be reduced and preheat time of the unit may be lengthened in

case of installing the unit in winter at following location:

- Shade position with a narrow space

- Location with much moisture in neighboring floor.

- Location with much humidity around.

- Location where ventilation is good. It is recommended to install the unit at a place with a lot of sunshine as possible as.

- Location where water gathers since the floor is not even.

3. When installing the unit in a place that is constantly exposed to a strong wind like a coast or on a high story of a building, secure a normal fan operation by using a duct or a wind shield.

• Install the unit so that its discharge port faces to the wall of the building.

Keep a distance 300mm or more between the unit and the wall surface.

• Supposing the wind direction during the operation season of the air conditioner, install the

unit so that the discharge port is set at right angle to the wind direction.

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.

Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.

- 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 4-points. Carrying and lifting the unit with 3-point

support may make it unstable, resulting in a fall.

CAUTION

Installation

Installation Manual 17

ENGLISH

General considerations

• If a sunroof is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the heat exchanger is not restricted.

• Ensure that the spaces indicated by arrows around front, back and side of the unit.

• Do not place animals and plants in the path of the warm air.

• Take the weight of the unit into account and select a place where noise and vibration are minimum.

• Select a place so that the warm air and noise from the unit do not disturb neighbors.

• The surface of the ground or the structure must be strong enough to bear the weight of the unit.

Installation Conditions

More than 300mm

Fence or

obstacles

More than 700mm

More than 600mm

*Minimum *Minimum 300mm300mm

Sunroof

*Minimum 300mm

* : Please secure the space to install the shut-off

valve and strainer.

Installation

18 Air-to-Water Heat Pump

Installation at Seaside

Seasonal Wind and Cautions in Winter

• Sufficient measures are required in a snow area or severe cold area in winter so that unit can be operated well.

• Get ready for seasonal wind or snow in winter even in other areas.

• Install a suction and discharge duct not to let in snow or rain.

• Install the unit not to come in contact with snow directly. If snow piles up and freezes on the air suction hole, the system may malfunction. If it is installed at snowy area, attach the hood to the system.

• Install the unit at the higher installation console by 500mm than the average snowfall (annual average snowfall) if it is installed at the area with much snowfall.

•

Where snow accumulated on the upper part of the unit by more than 100mm, always remove snow for operation.

1. The height of H frame must be more than 2 times the snowfall and its width shall not exceed the width of

the unit. (If width of the frame is wider than that of the unit, snow may accumulate.)

2. Don't install the suction hole and discharge hole of the unit facing the seasonal wind.

Selecting the location

1) If the unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided. Install the unit on the opposite side of the sea wind direction.

- It should be strong enough like concrete to prevent the sea wind from the sea.

- The height and width should be more than 150% of the unit.

- It should be keep more than 700 mm of space between unit and the windbreak for easy air flow.

2) In case, to install the unit on the seaside, set up a windbreak not to be exposed to the sea wind.

3) Select a well-drained place.

CAUTION

Unit should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.

2. Do not install the unit where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the unit. Corrosion, particularly on the condenser and evaporator fins, could cause unit malfunc-tion or inefficient performance.

3. If unit is installed close to the seaside, it should avoid direct exposure to the sea wind. Otherwise itneeds additional anticorrosion treatment on the heat exchanger.

Sea wind Sea wind

Sea wind

Windbreak

1. If you can’t meet above guide line in the seaside installation, please contact your supplier for the additional anticorrosion treatment.

2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water

Installation

Installation Manual 19

ENGLISH

Foundation for Installation

• Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise after installation.

• Fix the unit securely by means of the foundation bolts. (Prepare 4sets of M12 foundation bolts, nuts and washers each which are available on the market.)

• It is best to screw in the foundation bolts until their length are 20mm from the foundation surface.

Pallet(Wood Support)

- Remove before Installation

WARNING

• Be sure to remove the Pallet(Wood Support) of the bottom side of the unit Base Pan before fixing the bolt. It may cause the unstable state of the unit settlement, and may cause freezing of the heat exchanger resulting in abnormal operations.

• Be sure to remove the Pallet(Wood Support) of the bottom side of the unit before welding. Not removing Pallet(Wood Support) causes hazard of fire during welding.

1012

361

Anti-vibration

Concrete

base

materials

Four bolt are required 3 thread ridges

200

Frame

H-Beam

100

Spring washer

Nut

200

Foundation bolt executing method

[Unit:mm]

Installation

20 Air-to-Water Heat Pump

If is installed with pre-existing boiler, the boiler and should not be operated together. If entering water temperature of is above 55 °C, the system will stop operation to

prevent mechanical damage of the unit. For detailed electric wiring and water piping, please contact authorized installer.

Some installation scenes are presented for example. As these scenes are conceptual figures, installer should optimize the installation scene according to the installation conditions.

CASE 1: Connecting heat emitters for heating and cooling

(Under floor loop, Fan coil unit, and Radiator)

Outdoor Indoor

Floor heating loopFan coil unit

Radiator

Room thermostat(field supply) 2way valve

(field supply)

By-pass valve(field supply)

Strainer (Mesh: 1 mm × 1 mm)

Remote controller

Air vent

Shut-off valve(field supply)

Installation Scenes

Note:

• Room thermostat

- Type of thermostat and specification should be complied with chapter 5 of the installation manual.

• 2way valve

- It is important to install 2way valve to prevent dew condensation on the floor and radiator while

cooling mode.

- Type of 2way valve and specification should be complied with chapter 5 of the installation

manual.

- 2way valve should be installed at the supply side of the collector.

• By-pass valve

- To secure enough water flow rate, by-pass valve should be installed at the collector.

- By-pass valve should guarantee minimum water flow rate in any case. Minimum water flow rate

is described in water pump characteristics curve.

CAUTION

Installation

Installation Manual 21

ENGLISH

CASE 2:

Connecting sanitary water tank

(Under floor loop, Fan coil unit, and Radiator)

R T

Outdoor Indoor

Floor heating loopFan coil unit

Sanitary

water

tank

Hot water

City water

Radiator

Room thermostat(Field supply)

2way valve (Field supply)

3way valve (Field supply)

By-pass valve(Field supply)

Air vent

Remote controller

Shut-off valve(field supply)

Note:

• Sanitary water tank

- It should be equipped with internal electric heater to generate sufficient heat energy in very cold season.

• 3way valve

- Type of 3way valve and specification should be complied with chapter 5 of the installation manual.

Installation

22 Air-to-Water Heat Pump

CASE 3: Connecting Solar thermal system

Solar heat source

Hot water

R T

Outdoor Indoor

Floor heating loopFan coil unit

Sanitary

water

tank

City water

Radiator

Pump(Field supply)

Room thermostat(Field supply)

2way valve (Field supply)

3way valve (Field supply)

By-pass valve(Field supply)

Remote controller

Shut-off valve(field supply)

Note:

• Sanitary water tank

- It should have additional indirect heat exchanger to utilize heat energy by solar thermal system.

• Pump

- Maximum power consumption of pump should be less than 0.25kW.

Installation

Installation Manual 23

ENGLISH

General considerations

Followings are 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 if internal water pump capacity is

not enough for installation field.

• Never connect electric power while proceeding water charging.

Water piping and water circuit connection

Definition of terms are as follow :

• Water piping : Installing pipes where water is flowing inside the pipe.

• Water circuit connecting : Making connection between the unit and water pipes or between

pipes and pipes. Connecting valves or elbows are, for example, in this category.

Configuration of water circuit is shown in Chapter 4 "Installation Scenes". All connections should be complied with presented diagram.

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.

• Drain piping should be provided in case of water discharge by the operation of the safety valve.

This situation can be happened when the internal pressure is over 3.0 bar and water inside the unit will be discharged to drain hose.

• 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.

• While supplying water, pressure of supplying water should be 2.0 bar approximately.

• Pipe is insulated to prevent heat loss to external environment and to prevent dew generation on

the surface of the pipe in cooling operation.

Water Piping and Water Circuit Connection

Installation

24 Air-to-Water Heat Pump

Water condensation on the floor

While cooling operation, it is very important to keep leaving water temperature higher than 16 ℃. Otherwise, dew condensation can be occurred on the floor. If floor is in humid environment, do not set leaving water temperature below 18 °C.

Water condensation on the radiator

While cooling operation, cold water may not flow to the radiator. If cold water enters to the radiator, dew generation on the surface of the radiator can be occurred.

Drainage treatment

While cooling operation, condensed dew can drop down to the bottom of the unit. In this case, prepare drainage treatment (for example, vessel to contain condensed dew) to avoid water drop.

Water Pipe Insulation

Purpose of water pipe insulation is : To prevent heat loss to external environment. To prevent dew generation on the surface of the pipe in cooling operation. To prevent pipe breakage by freeze at winter season, ※ Must be insulation at exterior water pipe between product and building.

Shutoff Valve

- Shut-Off Valve is used to connect water pipe to unit.

- Tighten the flare nut with two spanner. (check the leak to the connection.)

When the water pipes are connected. It must be tightened the nut with two wrench. Otherwise pipes can be deformed.

Union

Water Out

Water In

WARNING

Water volume and pump capacity

The water pump is three speed-adjustable (Maximum / Medium / Minimum), so it may be required to change default water pump speed in case of noise by water flow. In most case, however, it is strongly recommended to set speed as Maximum.

Water pump speed

To secure enough water flow rate, do not set water pump speed as "Min." It can lead unexpected flow rate error CH14.

NOTICE

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LG HM123M INSTALLATION MANUAL

Specifications and Main Features

Frequently Asked Questions

User Manual