LG ARNU123NJA4 INSTALLATION MANUAL

INSTALLATION MANUAL

AIR CONDITIONER

ENGLISH FRANÇAIS

ESPAÑOL

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.

Vertical Air Handling Unit

www.lghvac.com

MFL65003108

Rev.00_010320

www.lg.com

IMPORTANT!

Please read this instruction sheet completely before installing the product.

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

WARNING

• Installation or repairs made by unqualified persons can result in hazards to you and others. Installation of all field wiring and components MUST conform with local building codes or, in the absence of local codes, with the National Electrical Code 70 and the National Building Construction and Safety Code or Canadian Electrical code and National Building Code of Canada.

• The information contained in the manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments.

• Failure to carefully read and follow all instructions in this manual can result in equipment malfunction, property damage, personal injury and/or death.

CAUTION

Safety Precautions

NOTE TO INSTALLING DEALER: The Owners Instructions and Warranty are to be given to the owner

Improper installation, adjustment, alteration, service or maintenance can void the warranty. The weight of the condensing unit requires caution and proper handling procedures when lifting or moving to avoid personal injury. Use care to avoid contact with sharp or pointed edges.

• Always wear safety eye wear and work gloves when installing equipment.

• Never assume electrical power is disconnected. Check with meter and equipment.

• Keep hands out of fan areas when power is connected to equipment.

• R-410A causes frostbite burns.

• R-410A is toxic when burned.

or prominently displayed near the indoor Furnace/Air Handler Unit.

Special warnings

When wiring:

Electrical shock can cause severe personal injury or death. Only a qualified, experienced electrician should attempt to wire this system.

• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

• Ground the unit following local electrical codes. Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

•

The choice of materials and installations must comply with the applicable local/national or international standards.

When transporting:

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your finger.

When installing...

... in a wall: Make sure the wall is strong enough to hold the unit's weight.

... in a room: Properly insulate any tubing run inside a room to prevent "sweating" that can cause

... in moist or uneven locatinons: Use a raised concrete pad or concrete blocks provide a solid,

... in an area with high winds: Securely anchor the outdoor unit down with bolts and a metal

... in a snowy area(for Heat Pump Model): Install the outdoor unit on a raised platform that is

When connecting refrigerant tubing

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Check carefully for leaks before starting the test run.

When servicing

• Turn the power OFF at the main power box(mains) before opening the unit to check or repair

electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site after you finish, remembering to check that no metal scraps or bits of wiring have

been left inside the unit being serviced.

It may be necessary to construct a strong wood or metal frame to provide added support.

dripping and water damage to wall and floors.

level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

frame. Provide a suitable air baffle.

higher than drifting snow. Provide snow vents.

2 Vertical Air Handling Unit

Vertical Air Handling Unit Installation Manual

TABLE OF CONTENTS

ENGLISH

Installation Requirements

Features.....................................4

Duct Connection Dimensions ...5

Safety Precautions ...................6

Installation.................................9

Selection of the best location....9

Upflow Installation ..................10

Duct work................................11

Horizontal-left Installation .......12

Preparation of Piping..............13 Connecting Pipes to the Indoor

Unit .........................................13 Plumbing materials and storage

methods..................................15

Insulation ................................17

Condensate Drain...................18

Wiring Connection ..................20

Electric Heater........................23

Dip Switch Setting ..................24

Group Control Setting.............25

Airborne Noise Emission ........29

Limiting concentration.............29

Product Data ...........................30

External Static Pressure & Air

Flow........................................30 Minimum airflow by heater

capacity ..................................31 Electric Heater Static pressure

drop factors.............................31 Air Filter (Field supply) Static

pressure drop factors..............32

Required Parts Required Tools

o Level gauge o Screw driver o Electric drill

o Four type "A" screws

o Pipes: Gas side

Liquid side (Refer to Product Data)

o Insulation materials o Additional drain pipe

o Hole core drill

o Hexagonal wrench o Gas-leak detector o Vacuum pump o Gauge manifold

o Owner's manual o Thermometer

o Electric Heater installation

manual

Installation Manual 3

Feature

Features

Wiring knockouts for conduit

Refrigerant connections

Drain connections for horizontal application

Filter access

4 Vertical Air Handling Unit

Drain connections for upflow application

Feature

Duct Connection Dimensions

<Top>

Refrigerant connections

Drain connections for horizontal application

Air filter cover

<Front>

Drain connections for upflow application

ENGLISH

<Side-right>

Capacity

(kBtu/h (RT))

12(1.0) 18(1.5)

24(2.0) 30(2.5) 36(3.0)

42(3.5) 48(4.0) 54(4.5)

Dimensions

A B C

Knock out

I J

D E F G H

Height Width Depth Power

48-5/8 (1236)18(457)

55-1/8 (1401)25(635)

21-3/8

(540)

21-3/8

(540)

21-3/8

(540)

1-9/16

17-1/2

(40)

(445)20(530)17(432)

1-9/16

17-1/2

(40)

(445)20(530)17(432)

1-9/16

24-1/2

(40)

(623)20(530)24(610)

12-1/8

(308)

12-1/8

(308)

12-1/8

(308)

1-11/16

(43)

1-11/16

(43)

1-11/16

(43)

(Unit: inch(mm))

Wiring

Commu nication

7/8

(22)

7/8

(22)

7/8

(22)

Refrigerant

Connections

Pipe size

Liquid Gas

1/4

1/2

(6.35)

(12.7)

3/8

5/8

(9.52)

(15.88)

3/8

5/8

(9.52)

(15.88)

Installation Manual 5

Safety Precautions

WARNING

CAUTION

WARNING

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 classi-

fied by the following indications.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

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

Be sure not to do.

Be sure to follow the instruction.

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.

•

- Do not disassemble or repair the product. There is risk of fire or electric shock.

• Always ground the product.

- 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 shock.

• Do not modify or extend the power cable.

- There is risk of fire or electric shock.

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

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

• Be cautious when unpacking and installing the product.

- Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser and evaporator.

• 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 product on a defective installation stand.

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

• 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, and 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.

6 Vertical Air Handling Unit

Safety Precautions

• 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.

Operation

• Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open.

- Moisture may condense and wet or damage furniture.

• 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 product with wet hands.

- There is risk of fire or electrical shock.

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

- There is risk of fire and electric shock.

• Do not allow water to run into electric parts.

- It may cause There is risk of fire, failure of the product, or electric shock.

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

- There is risk of fire or failure of product.

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

- Oxygen deficiency could occur.

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

- Do not use the telephone or turn switches on or off. There is risk of explosion or fire.

• If strange sounds, or smell or smoke comes from product. 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 product from the window before the hurricane arrives.

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

• Do not open the inlet grill 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.

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

- There is risk of fire or electric shock.

• Be cautious that water could not enter the product.

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

• Ventilate the product 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 product.

- There is risk of electric shock.

• When the product is not be used for a long time, disconnect the power supply plug or turn off the breaker.

- There is risk of product damage or failure, or unintended operation.

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

- This could result in personal injury and product damage.

ENGLISH

Installation Manual 7

Safety Precautions

CAUTION

Installation

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

- Low refrigerant levels may cause failure of product.

• Install the drain hose to ensure that water is drained away properly.

- A bad connection may cause water leakage.

• Keep level even when installing the product.

- To avoid vibration or water leakage.

• Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods.

- It may cause a problem for your neighbors.

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

- Avoid personal injury.

• Do not install the product where it will be exposed to sea wind (salt spray) directly.

- It may cause corrosion on the product. Corrosion, particularly on the condenser and evaporator

fins, could cause product malfunction or inefficient operation.

Operation

• Do not expose the skin directly to cool air for long periods of time. (Don't sit in the draft.)

- This could harm to your health.

• 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.

• Do not block the inlet or outlet of air flow.

- It may cause product failure.

• 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 product.

• Do not touch the metal parts of the product when removing the air filter. They are very sharp!

- There is risk of personal injury.

• Do not step on or put anything on the product. (outdoor units)

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

• Always insert the filter securely. Clean the filter every two weeks or more often if necessary.

A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or damage.

• Do not insert hands or other objects through the air inlet or outlet while the product is operated.

- There are sharp and moving parts that could cause personal injury.

• Do not drink the water drained from the product.

- It is not sanitary and could cause serious health issues.

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

- Be careful and avoid personal injury.

• Replace the all batteries in the remote control with new ones of the same type. Do not mix old and new batteries or different types of batteries.

- There is risk of fire or explosion.

• Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire.

- They may burn or explode.

• If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do not use the remote if the batteries have leaked.

- The chemicals in batteries could cause burns or other health hazards.

• If you eat the liquid from the batteries, brush your teeth and see doctor. Do not use the remote if the batteries have leaked.

- The chemicals in batteries could cause burns or other health hazards.

8 Vertical Air Handling Unit

Installation

Selection of the best location

• Where optimum air distribution can be ensured.

• Where nothing blocks air passage and install the duct work.

• Where condensate can be properly drained.

• Where the ceiling is strong enough to bear the indoor unit weight.

• Where the false ceiling is not noticeably on an incline.

• Where sufficient clearance for maintenance and service can be ensured.

• Where piping between indoor and outdoor units is possible within the allowable limit. Refer to the installation manual for the outdoor unit.

• Vertical Air Handling Unit can be installed for upflow and horizontal-left positions.

More than 350(13-25/32)

More than 600(23-5/8) clearance from access panels for Service

More than

250(9-27/32)

More than 250(9-27/32)

ENGLISH

More than 350(11-25/32)

NOTE : The primary and secondary drain line must be trapped to allow proper drainage of condensate

water, If the secondary drain line is not used, it must be capped.

In the case of sea coast installation, salt residue may cause corrosion of cabinet and component parts. Please take appropriate anti-corrosion measures.

Unit: mm (inch)

Installation Manual 9

Installation

Upflow Installation

• Position unit for plenum installation.

• The plenum should be secured in order to support the installation of adapter callers accommodate the installation of any duct work.

• Seal all duct work according to local codes to prevent air leakage. Ensure that filter access is unobstructed.

• The air handler support platform should be sturdy enough to support the cabinet plus any accessory components including filter box.

• The minimum height clearance is 14inches(350mm) to maintain proper air flow.

• Vibration isolators (purchased locally) must be placed between the unit and the pedestal.

• An illustration showing an example of where a vibration isolator should be added would clarify what the installing contractor should do to properly position the isolator.

Field Supplied Supply Duct

Field Supplied Return Plenum

More than 1inch (25mm)

More than 6 screws (M4*25L)

Do not connect the screws on Front and Rear side, it may cause the filter can not be mounted.

10 Vertical Air Handling Unit

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