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Installation

18

Indoor Unit

The A-weighted sound pressure emitted by this product is below 70 dB.
** The noise level can vary depending on the site.

The figures quoted are emission level and are not necessarily safe working levels. Whilst there is a cor-
relation between the emission and exposure levels, this cannot be used reliably to determine whether
or not further precautions are required. Factor that influence the actual level of exposure of the work-
force include the characteristics of the work room and the other sources of noise, i.e. the number of
equipment and other adjacent processes and the length of time for which an operator exposed to the
noise. Also, the permissible exposure level can vary from country to country. This information, however,
will enable the user of the equipment to make a better evaluation of the hazard and risk.

Model Designation 

Airborne Noise Emission

Limiting concentration is the limit of Freon gas concentration where immediate measures can be
taken without hurting human body when refrigerant leaks in the air. The limiting concentration shall
be described in the unit of kg/m

3

(Freon gas weight per unit air volume) for facilitating calculation

n

Calculate refrigerant concentration

Refrigerant concentration = 

Total amount of replenished refrigerant in refrigerant facility (kg)

Capacity of smallest room where indoor unit is installed (m

3

)

Limiting concentration

ARN

U

G

07

A

CE

4

Serial Number

Chassis Name

Electrical Ratings
1:1Ø, 115V, 60Hz
6:1Ø, 220 - 240V, 50Hz 
3:1Ø, 208/230V, 60Hz

2:1Ø, 220V, 60Hz
7:1Ø, 100V, 50/60Hz
G:1Ø, 220 - 240V, 50Hz/1Ø, 220V, 60Hz 

Total Cooling Capacity in Btu/h 
EX) 5,000 Btu/h 

 '05'      18,000 Btu/h 

 '18'

Combination of Inverter Type and Cooling Only or Heat Pump 
N: AC Inverter and H/P 

V: AC Inverter and C/O

U: DC Inverter and H/P and C/O

                    System with Indoor Unit using R410A

❈ 

LGETA:U  Ex) URN

Combinations of functions
A:Basic function 

L: Neo Plasma(Wall Mounted)

C: Plasma(Ceiling Cassette)
G: Low Static 

K: High Sensible Heat 

U: Floor Standing without Case
SE/S8 - R: Mirror  V: Silver   B:Blue(ART COOL Type Panel Clolr)
SF       - E: Red     V: Silver  G:Gold     1: Kiss (Photo changeable)
Q: Console 

Z: Fresh Air Intake Unit 

Limiting concentration: 0.44kg/m

3

(R410A)

Summary of Contents for ARNU243CFA4

Page 1: ...ork 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 MFL65003109 http www lghvac com www lg com Copyright 2014 2018 LG Electronics Inc All Rights Reserved ENGLISH FRANÇAIS ESPAÑOL ...

Page 2: ...ecified torque wrenches different depending on model No o Spanner Half union o A glass of water o Screw driver o Hexagonal wrench o Gas leak detector o Vacuum pump o Gauge manifold o Owner s manual o Thermometer Features 3 Safety Precautions 4 Installation Selection the best location 7 How to connect wirings 9 Wiring Connection 9 Indoor Unit Drain Piping 10 Dip Switch Setting 13 Group Control Sett...

Page 3: ...nduit mounting plate Quantity 1 EA 4 EA 1 each 8 EA 1 EA Shape Other Owner s manual Installation manual for gas pipe for liquid pipe Installation Tool Air Inlet Air filter At Air Inlet Remote Controller Air Outlet Control panel Control panel Air Filter Air Inlet Remote Controller TEMP CEA CFA Type CEU CFU Type ...

Page 4: ...ely 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 f...

Page 5: ...hen flammable gas leaks turn off the gas and open a window for ventilation before turn the prod uct on Do not use the telephone or turn switches on or off There is risk of explosion or fire If strange sounds or small 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...

Page 6: ...ge 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 anyting 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...

Page 7: ...s strong enough to bear the indoor unit weight Where the floor is not significantly inclined Where nothing blocks the air passage Where condensate can be properly drained Where sufficient clearance for installation and maintenance can be ensured Where there is no possibility of flammable gas leakage Where optimum air distribution can be ensured Where piping between indoor and outdoor units is poss...

Page 8: ...perform the procedure in opposite order 1 Use the installationmount for installation Check whether the wall is strong enough to bear the weight of the unit or not if there is a risk rein force the wall before installing the unit 2 The unit requires a minimum 100 mm clearance on the underside for air intake Also ensure the unit is level when installed so that drainage flows smoothly If inclined wat...

Page 9: ...mping of cables 1 Arrange 2 power cables on the control panel 2 First fasten the steel clamp with a screw to the inner boss of control panel 3 For the cooling model fix the other side of the clamp with a screw strongly For the heat pump model put the AWG18 cable thinner cable on the clamp and tighten it with a plastic clamp to the other boss of the control panel A B A B GND 12V DRY2 DRY1 INTERNET ...

Page 10: ...it ting while referrig to the figure Fasten both ends with clamps Indoor unit Thermal insulator accessory Fastening band accessory Insulation for fitting accessory For liquid piped Insulation for fitting accessory For gas piped liquid pipe Refrigerant piping Clamp 6 4 accessory HEAT INSULATION Drain piping work Drain piping must have downward 1 50 to 1 100 be sure not to provide up and down slope ...

Page 11: ...ive 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 specifi cation Particularly note the relation between cable length and thickness 8 Never fail...

Page 12: ...g you must use round pressure terminals When none are available follow the instructions below Do not connect wiring of different thicknesses to the power terminal block Slack in the power wiring may cause abnormal heat When connecting wiring which is the same thickness do as shown in the figure below For wiring use the designated power wire and connect firmly then secure to prevent outside pressur...

Page 13: ...6 Heater linkage N A Off SW7 Ventilator link age Selection of Ventilator linkage Linkage Removal Working Off Vane selection Console Selection of up down side Vane Up side Down side Vane Up side Vane Only Region selec tion Selection tropical re gion General model Tropical model SW8 Etc Spare Off 1 Indoor Unit 2 Outdoor Unit In case that the products meet specific conditions Auto addressing function...

Page 14: ... controller 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 recogni...

Page 15: ... master and slave h In case of Group Control it is possible to use following functions Selection of operation stop or mode Temperature setting and room temperature check Current time change Control of flow rate High Middle Low Reservation settings It is not possible to use some functions h It is possible to control 16 indoor units Max with the master wired remote control h Other than those it is s...

Page 16: ...AU FAU Standard Standard FAU FAU Fresh Air Intake Unit Standard Standard Indoor Unit h In case of connecting with standard indoor unit and Fresh Air Intake Unit separate Fresh Air Intake Unit with standard units N M 16 Because setting temperature are different h Other than those it is same with Group Control 1 3 Group Control 3 n Mixture connection with indoor units and Fresh Air Intake Unit ...

Page 17: ...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 that any error occurs at indoor unit the error code is displayed on the wired remote controller 6 There isnʼt limits of indoor unit function 5 Accessories for group control setting It is possible to set group control by using below accessories Indoor unit 2...

Page 18: ...en without hurting human body when refrigerant leaks in the air The limiting concentration shall be described in the unit of kg m3 Freon gas weight per unit air volume for facilitating calculation n Calculate refrigerant concentration Refrigerant concentration Total amount of replenished refrigerant in refrigerant facility kg Capacity of smallest room where indoor unit is installed m3 Limiting con...

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