LG ARNU363TNC2 Air Conditioner Instruction Manual

LG ARNU363TNC2 Air Conditioner

Specifications

• Brand: LG
• Model: ARNU363TNC2
• Type: Ceiling Cassette – 4Way

Product Usage Instructions

IMPORTANT
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.

• 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.

WARNING

• Installation or repairs made by unqualified persons can result in hazards to you and others. Installation MUST conform with local building codes or, in the absence of local codes, with the National Electrical Code NFPA 70/ANSI C1-1993 or current edition and Canadian Electrical Code Part1 CSA C.22.1.
• 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: 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.

Safety Precautions

• 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.

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

• 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. It may be necessary to construct a strong wood or metal frame to provide added support.
  • in a room: Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to wall and floors.
  • in moist or uneven locatinons: Use a raised concrete pad or concrete blocks provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.
  • in an area with high winds: Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.
  • in a snowy area(for Heat Pump Model): Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

• 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.

Important Safety Information
Before installing the product, please read the instruction sheet completely. This air conditioning system meets strict safety and operating standards. Install or service the system safely and efficiently.

Installation Parts

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 air conditioner.
• 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: This symbol indicates the possibility of death or serious injury.
  • Caution: This symbol indicates the possibility of injury or damage to properties only.
• Meanings of symbols used in this manual are as shown below.
  • Be sure not to do.
  • Be sure to follow the instruction.

Installation Requirements

• Properly insulate tubing inside rooms to prevent sweating and water damage.
• Use a raised concrete pad or blocks for outdoor unit foundation in moist or uneven locations.
• Securely anchor the outdoor unit in high wind areas with bolts and a metal frame.
• For snowy areas (Heat Pump Model), install the outdoor unit on a raised platform higher than drifting snow with snow vents.

Installation Process

1. Refer to the Installation Manual for required parts and tools.
2. Select the best location based on ceiling dimensions and hanging bolt locations.
3. Follow the wiring connection instructions carefully.
4. Install the decoration panel as per the manual.
5. Complete drain piping installation.
6. Install the remote control and set up wired remote controller if needed.
7. Perform dip switch setting as instructed.
8. Conduct group control setting as required.

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 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.

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.

Operation

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

• There is risk of fire or failure of product.

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.

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.

Read completely, then follow step by step.

Selection of the best location

• There should not be any heat source or steam near the unit.
• There should not be any obstacles to the air circulation.
• A place where air circulation in the room will be good.
• A place where drainage can be easily obtained.
• A place where noise prevention is taken into consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from the wall, ceiling, or other obstacles.
• The indoor unit must have the maintenance space.

CAUTION: In case that the unit is installed near the sea, the installation parts may be corroded by salt. The installation parts (and the unit) should be taken appropriate anti-corrosion measures.

Ceiling dimension and hanging bolt location

• The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions
• Select and mark the position for fixing bolts and piping hole.
• Decide the position for fixing bolts slightly tilted to the drain direction after considering the direction of drain hose.
• Drill the hole for anchor bolt on the wall.

CAUTION :

• This air-conditioner uses a drain pump.
• Install the unit horizontally using a level gauge.
• During the installation, care should be taken not to damage electric wires.

NOTICE
Avoid the following installation location.

1. Such places as restaurants and kitchen where considerable amount of oil steam and flour is generated.
   These may cause heat exchange efficiency reduction, or water drops, drain pump mal-function. In these cases, take the following actions;

2. Make sure that ventilation fan is enough to cover all noxious gases from this place.

3. Ensure enough distance from the cooking room to install the air conditioner in such a place where it may not suck oily steam.

4. Avoid installng air conditioner in such places where cooking oil or iron powder is generated.

5. Avoid places where inflammable gas is generated.

6. Avoid place where noxious gas is generated.

7. Avoid places near high frequency generators.

The following parts are local purchasing.

1. Hanging Bolt – W 3/8 or M10
2.  Nut – W 3/8 or M1
3. Spring Washer – M10
4. Plate Washer – M10

CAUTION: Tighten the nut and bolt to prevent unit from falling off.

Wiring Connection
Open the control box cover and connect the remote control cord and Indoor power wires.

• TR/TQ/TE Chassis
• TM/TN/TP Chassis

WARNING: Make sure that the screws of the terminal are free from looseness.

Connection method of the connecting cable (Example)

WARNING: Loose wiring may cause the terminal to overheat or result in unit malfunction.

A fire hazzard may also exist.
Therefore, be sure all wiring is tightly connected.

CAUTION:
After the confirmation of the above conditions, prepare the wiring as follows:

1. Never fail to have an individual power specialized for the air conditioner. As for the method of wiring, be guided by the circuit diagram posted on the inside of control box cover.
2. Provide a circuit breaker switch between power source and the unit.
3. The screws which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation. Check them and make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the wires.)
4. Specification of power source
5. Confirm that electrical capacity is sufficient.
6. Be sure that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate.
7. Confirm that the cable thickness is as specified in the power sources specification. (Particularly note the relation between cable length and thickness.)
8. Never fail to equip a leakage breaker where it is wet or moist.
9. The following troubles would be caused by voltage drop-down.
10. The vibration of a magnetic switch, damage on the contact point, fuse breaking, disturbance by the normal function of an overload protection device.
11. Proper starting power is not given to the compressor.

HAND OVER
Teach the customer the operation and maintenance procedures, using the operation manual. (air filter cleaning, temperature control, etc.)

Installation of Decoration Panel

• The decoration panel has its installation direction.
• Before installing the decoration panel, always remove the paper template.

1. Temporarily fix two decoration panel fixing screws (hexagon M5 screw) on the unit body. (Tighten by amount 10mm(3/8 inch) in length. The fixing screws (hexagon M5 screw) are included the indoor unit box.
2. Remove the air inlet grille from the decoration panel. (Remove the hook for the air inlet grille cord.)
3. Hook the decoration panel key hole ( ) on the screws fixed in step above, and slide the panel so that the screws reach the key hole edge.
4. Retighten completely two temporarily fixed screws and other two screws. (Total 4 screws)
5. Connect the louver motor connector and display connector.
6. After tightening these screws, install the air inlet grille (including the air filter).

CAUTION: Install certainly the decoration panel. Cool air leakage causes sweating. Water drops fall.

Drain Piping

• Drain piping must have down-slope (1/50 to 1/100): be sure not to provide up-and-down slope to prevent reversal flow.
• During drain piping connection, be careful not to exert extra force on the drain port on the indoor unit.
• The outside diameter of the drain connection on the indoor unit is 32mm(1-1/4 inch).
  • Piping material: Polyvinyl chloride pipe inner diometes Ø 25mm(1 inch) and pipe fittings
• Be sure to install heat insulation on the drain piping.
  • Heat insulation material: Polyethylene foam with thickness more than 8mm(5/16 inch).

Drain test
The air conditioner uses a drain pump to drain water.

Use the following procedure to test the drain pump operation:

CAUTION: The supplied flexible drain hose should not be curved, neither screwed. The curved or screwed hose may cause a leakage of water.

• Connect the main drain pipe to the exterior and leave it provisionally until the test comes to an end.
• Feed water to the flexible drain hose and check the piping for leakage.
• Be sure to check the drain pump for normal operating and noise when electrical wiring is complete.
• When the test is complete, connect the flexible drain hose to the drain port on the indoor unit.

Attention

1. Possible drain-head height is up to 700mm(27- 9/16 inch). So, it must be installed below 700mm(27-9/16 inch).
2. Keep the drain hose downward up to 1/50~1/100 inclination. Prevent any upward flow or reverse flow in any part
3. 5mm or thicker formed thermal insulator is provided for the drain pipe.
4. Upward routing is not allowed.
5. Be sure to check the drain pump for normal operation and abnormal noise when electrical wiring is complete.

Installation of Wired Remote Controller

1. Connect the wired remote controller cable to the wired remote controller installation board as shown in the right picture.

   • The wired remote controller cable is connected as factory default.

2. After fixing the cable to the guide slot, attach the wired remote controller installation board at the desired location.

3. Before fixing the wired remote controller cable to the guide slot, remove any clogged part of the case in the direction to install before the installation.

4. After locating the wired remote controller installation board at the desired location, screw the unit firmly. (When there is a buried box, install the wired remote controller board to fit the buried box.)

5. Use the screw provided.

6. After fixing the top part of the wired remote controller to the installation board as shown in beside picture, press the bottom part to assemble the controller to it’s board.
   When disassemble the wired remote controller from the installation board, use the driver as shown in the right picture and insert it into the hole with the arrow. And when you pull the driver in the front direction, the wired remote controller will be separated.

7. Use the connecting cable to connect the indoor unit and the wired remote controller.

8. When the distance between the wired remote controller and the indoor unit is 10m and above, use the extension cable.

Caution:
When installing the wired remote controller, do not bury it in the wall. (It can cause damage in the temperature sensor.) Do not install the cable to be 50m or above. (It can cause communication error.)

• When installing the extension cable, check the connecting direction of the connector of the remote controller side and the product side for correct installation.
• If you install the extension cable in the opposite direction, the connector will not be connected.
• Specification of extension cable: 2547 1007 22# 2 core 3 shield 5 or above.

Optional Operation of Wired Remote Controller

Two Thermistor Syste Therefore system will use value that sensed from indoor unit or remote controlle

If you want to know more Optional Operation, please refer to Wide Wired Remote Controller Manual.

Dip Switch Setting

Caution
For Multi V Models, Dip switch 1, 2, 6, 8 must be set OFF. That dip switch is used for other models.

1. Group Control 1
   • Wired remote controller 1 + Indoor units
   1. It is possible to 16 indoor units(Max) by one wired remote controller. Set only one indoor unit to Master, set the others to Slave.
   2. It is possible to connect with every type of indoor units.
   3. It is possible to use wireless remote controller at the same time.
   4. It is possible to connect with Dry Contact and Central controller at the same time. The Master indoor unit is possible to recognize Dry Contact and Central controller only.
   5. In case of any error occurs at indoor unit, display on the wired remote controller. Exception of the error indoor unit, an individual indoor unit control possibility.
   6. In case of Group Control, be limited additional functions of indoor unit.
   7. Selection of operation options (stop/mode/temperature)
   8. Control of flow rate (strong/middle/weak)
   9. Time reservation function
   10. Elevation grille
   • All kind of indoor units be set possible using a wireless remote controller, except cassette and duct types. Refer to wireless remote controller manual for setting group control.
   • It is possible to connect indoor units since Feb. 2009. In the other cases, please contact LGE.
2. Group Control 2
   • Wired remote controllers + Indoor units
   1. It is possible to control N indoor units by wired remote controller M units. (M+N≤17 Units)
   • Set only one indoor unit to Master, set the others to Slave.
   • Set only one wired remote controller to Master, set the others to Slave.
   • Other than those, it is same with the Group Control 1.
   2. It is possible to connect with every type of indoor units.
   3. It is possible to use wireless remote controller at the same time.
   4. It is possible to connect with Dry Contact and Central controller at the same time. The Master indoor unit is possible to recognize Dry Contact and Central controller only.
   5. In case of any error occurs at indoor unit, display on the wired remote controller. Exception of the error indoor unit, an individual indoor unit control possibility.
   6. In case of Group Control, be limited additional functions of indoor unit.
   • Selection of operation options (stop/mode/temperature)
   • Control of flow rate (strong/middle/weak)
   • Time reservation function
   • Elevation grille
   • All kind of indoor units be set possible using a wireless remote controller, except cassette and duct types. Refer to wireless remote controller manual for setting group control.
   • It is possible to connect indoor units since Feb. 2009. In the other cases, please contact LGE.

Remote Control
Wired remote controller 2 + Indoor unit 1

1. It is possible to connect two wired remote controllers with one indoor unit.
2. Every types of indoor unit is possible to connect two remote controller.
3. It is possible to use wireless remote controller at the same time.
4. It is possible to connect with Dry Contact and Central controller at the same time.
5. In case of any error occurs at indoor unit, display on the wired remote controller.
6. There isn’t limits of indoor unit function.

P/No.: MFL42803115
Printed in Korea
After reading this manual, keep it in a place easily accessible to the user for future reference.

FAQ

Q: What are the safety precautions when installing the LG ARNU363TNC2?
A: Ensure proper insulation, foundation support, anchoring in high wind areas, and raised platform installation in snowy areas. Follow all installation instructions carefully to prevent damage and ensure safe operation.

Q: What tools are needed for installation?
A: Required tools include screwdriver, electric drill, hole core drill, flaring tool set, specified torque wrenches, spanner, hexagonal wrench, gas- leak detector, vacuum pump, gauge manifold, and thermometer among others. Refer to the Installation Manual for a comprehensive list.

References

• Shopindex - Boutique
• Repair Your Grill: Shop Replacement Parts for 24,880 Models
• Lg Air Conditioner Parts - Select From 2329 Models

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