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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.your set and retain it for future reference.
MODELS: ARUV Series
ARUN Series
Original instruction
P/NO : MFL67798003
www.lg.com
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Table of Contents
Related Manuals for LG ARUN50LR2
Summary of Contents for LG ARUN50LR2
- Page 1 • 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.your set and retain it for future reference. MODELS: ARUV Series ARUN Series Original instruction www.lg.com P/NO : MFL67798003...
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Page 2: Table Of Contents
ARUV/ARUN Series Outdoor unit Installation Manual TABLE OF CONTENTS Safety Precautions ....................3 Installation Process ....................7 Outdoor units Information..................8 Environment-friendly Alternative Refrigerant R410A ........9 Select the Best Location..................9 Installation Space....................10 Lifting method ......................12 Installation ......................13 Refrigerant piping installation ................17 Electrical Wiring ....................35 Test Run ........................48 Caution For Refrigerant Leak................56 Installation guide at the seaside .................58... -
Page 3: Safety Precautions
Safety Precautions 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 classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury. - Page 4 Safety Precautions When installing and moving the air condition- Do not reconstruct to change the settings of er to another site, do not charge it with a the protection devices. differnet refrigerant from the refrigerant specified on the unit. • If a differnet refrigerant or air is mixed with the •...
- Page 5 Safety Precautions CAUTION n Installation Always check for gas (refrigerant) leakage Do not install the product where the noise or after installation or repair of product. hot air from the outdoor unit could damage the neighborhoods. • Low refrigerant levels may cause failure of •...
- Page 6 Safety Precautions Install and insulate the drain hose to ensure Do not operate with "System louver" closed. that water is drained away properly based on the installation manual. • A bad connection may cause water leakage. • It may cause failure of appliance or accident. Be very careful about product transportation.
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Page 7: Installation Process
Installation Installation Process Indicate clearly who is to be responsible for switch settings Determination of division work Make relationship between outdoor, indoor, remote controller, and option connections clear. Preparation of contract drawings (Prepare control circuit diagram) Take account of gradient The foundation must be level even Sleeve and insert work Outdoor unit foundation work... -
Page 8: Outdoor Units Information
Ratio of the running Indoor Units to the Outdoor: Within 10 ~ 100% A combination operation over 100% cause to reduce the total capacity. Power Supply: Outdoor Unit (3Ø, 380~415V, 50Hz / 3Ø, 380V, 60Hz) n Heat Pump ARUN50LR2 ARUN60LR2 ARUN80LR2 Model... -
Page 9: Environment-Friendly Alternative Refrigerant R410A
Environment-friendly Alternative Refrigerant R410A Environment-friendly Alternative Refrigerant R410A • The refrigerant R410A has the property of higher operating pressure in comparison with R22. Therefore, all materials have the characteristics of higher resisting pressure than R22 ones and this character- istic should be also considered during the installation. R410A is an azeotrope of R32 and R125 mixed at 50:50, so the ozone depletion potential (ODP) of R410A is 0. -
Page 10: Installation Space
Installation Space Installation Space (Unit : mm) UV : 1150 UV1 : 995 Door Width UV : 900 UV1 : 745 723(Anchor Bolt) • Space for the "*" display part of by type of system louver When installing automatic louver: 150 When installing manual louver: 150 When installing fixed louver: 100 (Basic space) •... - Page 11 Installation Space Recommended Effective Opening Ratio(E.O.R) of Louver θ θ • ho = h * COSθ • Total Area(A) = H * W • Effective Area(Af) = ho * W * N • Opening Ratio(n) = Af/A ’ Af = A * n E.O.R(%) = X 100 Ad + As...
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Page 12: Lifting Method
Lifting Method Lifting method • When carrying the unit suspended, pass the ropes under the unit and use the two suspension points each at the front and rear. • Always lift the unit with ropes attached at four points so that impact is not applied to the unit. •... -
Page 13: Installation
Installation Installation Location of anchor bolt n Installation foot (Location of anchor bolt) (Unit : mm) Foundation for Installation • Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust. •... - Page 14 Installation Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure. 1) Cut the pipes and the cable. n Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough tube...
- Page 15 Installation FLARE SHAPE and FLARE NUT TIGHTENING TORQUE Precautions when connecting pipes • See the following table for flare part machining dimensions. • When connecting the flare nuts, apply refrigerant oil to the inside and outside of the flares and turn them three or four times at first.
- Page 16 Installation HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C). Fastening band (accessory) 2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "ISO Conditions with Mist" and confirmed that there is not any default.
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Page 17: Refrigerant Piping Installation
Refrigerant piping installation Refrigerant piping installation WARNING Always use extreme care to prevent the refrigerant gas (R410A) from leakage while using fire or flame. If the refrigerant gas comes in contact with the flame from any source, such as a gas stove, it breaks down and generates a poisonous gas which can cause gas poisoning. - Page 18 Refrigerant piping installation Caution 1. Use the following materials for refrigerant piping. • Material: Seamless phosphorous deoxidized copper pipe • Wall thickness : Comply with the relevant local and national regulations for the designed pressure 3.8MPa. We recommend the following table as the minimum wall thickness. Outer diameter 6.35 9.52...
- Page 19 Refrigerant piping installation 12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling perfor- mance, drip of condensate and other such problems. 13. When connecting the refrigerant piping, make sure the service valves of the Outdoor Unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the Outdoor and Indoor Units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.
- Page 20 Refrigerant piping installation Selection of Refrigerant Piping Outdoor unit Gas pipe Liquid pipe Branching pipe Main pipe Indoor unit Branching pipe Piping parts Name Selection of pipe size Size of main pipe Liquid pipe Gas pipe Outdoor unit Outdoor unit capacity type [mm(inch)] [mm(inch)] ①...
- Page 21 Refrigerant piping installation Refrigerant piping system u Y branch method Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units L150m l 40m h 15m Ú Total pipe length = A+B+C+D+a+b+c+d+e ≤ 300m Longest pipe length * Equivalent pipe length A+B+C+D+e ≤...
- Page 22 Refrigerant piping installation u Header Method Example : 6 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch Ⓒ : Indoor Units Ⓓ : Sealed piping L 150m h 15m Branch pipe can not be used after header Ú...
- Page 23 Refrigerant piping installation u Combination of Y branch/header method Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Y branch Ⓓ : Indoor Unit Ⓔ : Header Ⓕ : Sealed piping L150m Branch pipe can not be used after header Ú...
- Page 24 Refrigerant piping installation u The Amount of Refrigerant The calculation of the additional charge should take account of the length of pipe. Product Charge ARUN50LL2(R2) = 5.2kg ARUN60LL2(R2) = 5.2kg ARUN80LL2(R2) = 6.4 kg ARUV80LL2(R2) = 4.5kg ARUV100LL2(R2) = 5.1kg Additional charge (kg) Total liquid pipe (m): Ø22.2mm x 0.354(kg/m)
- Page 25 Refrigerant piping installation WARNING ▶ Regulation for refrigerant leakage : the amount of refrigerant leakage should satisfy the following equation for human safety. Total amount of refrigerant in the system ≤ 0.44 ( kg / m Volume of the room at which Indoor Unit of the least capacity is installed p If the above equation can not be satisfied, then follow the following steps.
- Page 26 Refrigerant piping installation Distribution Method 1. Line Distribution 3rd main pipe distribution Main pipe Distribution 3rd main pipe distribution 2. Vertical Distribution Ensure that the branch pipes are attached vertically. 3. The others Header Outdoor Unit...
- Page 27 Refrigerant piping installation Branch pipe Fitting Y branch To Outdoor Unit To Branch Piping or Indoor Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing Facing plane downwards upwards Within +/- 10° Viewed from point A in direction of arrow Within ±3°...
- Page 28 Refrigerant piping installation • When the number of indoor units to be connected to the branch pipes is less than the number of branch pipes available for connection then cap pipes should be fitted to the surplus branches. Pinched pipe •...
- Page 29 Refrigerant piping installation Selection of Y Branch and Header 1. Y Branch [unit:mm] Models Gas pipe Liquid pipe I.D12.7 I.D12.7 I.D6.35 I.D15.88 I.D15.88 I.D.6.35 I.D9.52 I.D9.52 I.D15.88 ARBLN01621 I.D.6.35 I.D12.7 I.D.9.52 I.D19.05 O.D9.52 O.D15.88 I.D12.7 I.D22.2 I.D19.05 I.D15.88 I.D19.05 I.D12.7 I.D12.7 I.D9.52 I.D19.05...
- Page 30 Refrigerant piping installation 2. Header [unit:mm] Models Gas pipe Liquid pipe 60*3=180 60*3=180 ID12.7 ID15.88 ID6.35 4 branch ID9.52 ID6.35 ID12.7 OD19.05 ID12.7 OD12.7 ID9.52 ID15.88 ARBL054 ID9.52 ID15.88 ID19.05 ID12.7 ID15.88 60*6=360 60*6=360 ID9.52 ID6.35 ID12.7 7 branch OD19.05 ID12.7 ID12.7 OD12.7...
- Page 31 Refrigerant piping installation Leak Test and Vacuum (1) Leak test Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(38.7kgf/cm ). If the pressure does not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitrogen leaks. For the test method, refer to the following figure.
- Page 32 Refrigerant piping installation (2) Vacuum Vacuum drying should be made from the service port provided on the outdoor unit’s service valve to the vac- uum pump commonly used for liquid pipe, gas pipe. Vaccum of the pipe and the indoor units should be made from the port of the outdoor unit's service valve with the service valve closed.
- Page 33 Refrigerant piping installation Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replace- ment or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method Main PCB ODU power reset Master main PCB DIP switch OFF( No.11,14) SW01S Main PCB Power reset...
- Page 34 Refrigerant piping installation Thermal Insulation of refrigerant piping Be sure to give insulation work to refrigerant piping by covering liquid pipe and gas pipe separately with enough thickness heat-resistant polyethylene, so that no gap is observed in the joint between indoor unit and insulating material, and insulating materials themselves.
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Page 35: Electrical Wiring
Electrical Wiring Electrical Wiring Areas of Caution 1. Follow ordinance of your governmental organization for technical standard related to electrical equipment, wiring regulations and guidance of each electric power company. WARNING Be sure to have authorized electric engineers do electric work using special circuits in accordance with regulations and this installation manual. - Page 36 Electrical Wiring Control box and connecting position of wiring - Remove all of the screws at front panel and remove the panel by pulling it forward. - Connect communication line between main and sub outdoor unit through the terminal block. - Connect communication lines between outdoor unit and indoor units through the terminal block.
- Page 37 Electrical Wiring Communication and Power Lines 1) Communication cable • Types : shielding wire • Use wires of size : over 1.25mm • Maximum allowable temperature: 60°C • Maximum allowable line length: under 300m 2) Remote control cable • Types : 3-core cable 3) Simple central control cable •...
- Page 38 Electrical Wiring u Wiring of Main Power Supply and Equipment Capacity 1. Use a separate power supply for the Outdoor Unit and Indoor Unit. 2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceed- ing with the wiring and connections. 3.
- Page 39 Electrical Wiring u Precautions when laying power wiring Use round pressure terminals for connections to the power terminal block. Power wire Round pressure terminal 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.) •...
- Page 40 Electrical Wiring u Example Connection of Communication Cable 1. 50Hz 3 Phase 4 Wires Power line(R, S, T, N) Communication line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch Communication line (2 shield line): Between Indoor Unit and Outdoor Unit (Switch fuse : ELCB) 3 Phase 4 Wires Power supply...
- Page 41 Electrical Wiring 2. 60Hz 3 Phase 4 Wires Power line(R, S, T, N) Communication line (3 line): Wired remote control Single Phase of power supply line(L, N) Power supply switch Communication line (2 shield line): Between Indoor Unit and Outdoor Unit (Switch fuse : ELCB) 3 Phase 4 Wires Power supply...
- Page 42 Electrical Wiring Location of setting Switch n Location of setting Switch Main PCB SW01B SW02B (DIP S/W) (DIP S/W) 7 - Segment SW02V Auto addressing SW01V Data confirm n Checking according to dip switch setting 1. You can check the setting values of the outdoor unit from the 7 segment LED. The dip switch setting should be changed when the power is OFF.
- Page 43 Electrical Wiring n Setting the DIP switch (SW01B/SW02B) • If you set the Dip switch when power is on, the changed setting will not be applied immediately. The changed setting will be enabled only when Power is reset or by pressing Reset button. 1.
- Page 44 Electrical Wiring Function Function SW01B Setting SW01B Setting SW02B Setting SW02B Setting Remarks Remarks Power reset is Night Silent Necessary Fan RPM down Operation at on night time 9 10 11 12 13 14 9 10 11 12 13 14 Power reset is Necessary Pump Down...
- Page 45 Electrical Wiring Automatic Addressing • The address of indoor units would be set by auto Main PCB addressing SW01B SW02B 1) Wait for 3 minutes after applying power supply (DIP S/W) (DIP S/W) (main and sub outdoor unit, indoor unit). 2) Press the switch of the outdoor unit (SW02V) for 5 7 - Segment seconds.
- Page 46 Electrical Wiring Group Number setting Group Number setting for Indoor Units ① Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. ② The communication lines connected to INTERNET terminal should be connected to central control of Outdoor unti with care for their polarity( A ’...
- Page 47 Back n Without Cool/Heat Selector Installation and Connection In case, try to set mode without Cool/Heat Selector and try to use other switch except from LG Outdoor Cool/Heat Selector in field. Connect signal terminal block as below figure and description.
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Page 48: Test Run
Test Run Test Run Checks Before Test Run Check to see whether there is any refrigerant leakage, and slack of power or communication cable. Confirm that 500 V megger shows 2 MΩ or more between power supply terminal block and ground. Do not operate in the case of 2 MΩ... - Page 49 Test Run How to Cope with Test Run Abnormality The phenomena from main component failure Component Phenomenon Cause Check method and Trouble shooting Not operating Motor insulation broken Check resistance between terminals and chassis Strainer clogged Change strainer Compressor Oil leakage Check oil amount after opening oil port Stop during running Motor insulation failure...
- Page 50 Test Run Night Silent Operation n ARUV series In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night which has low cooling load. Max. RPM setting method Master ODU Dip S/W No.12+14 ON SW01B Master ODU...
- Page 51 Test Run n ARUN series In cooling mode, this function makes the ODU fan operate at low RPM to reduce the fan noise of ODU at night which has low cooling load. Max. RPM setting method Master ODU Dip S/W No.12+14 ON SW01B Master ODU Main PCB Power Reset...
- Page 52 Test Run Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replace- ment or IDU addition/replacement. Vacuum mode setting method Vacuum mode cancellation method Main PCB ODU power reset Master main PCB DIP switch OFF( No.11,14) SW01S Main PCB Power reset...
- Page 53 Test Run Self-Diagnosis Function Error Indicator • This function indicates types of failure in self-diagnosis and occurrence of failure for air condition. • Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as shown in the table.
- Page 54 Test Run Display Title Cause of Error Outdoor Unit Inverter DC link High System is turned off by outdoor unit DC Voltage Over Voltage Charging Outdoor Unit Inverter Compressor Outdoor Unit Inverter Compressor Fault OR Drive Over Current Fault Outdoor Unit Inverter Compressor System is turned off by outdoor unit Inverter High Discharge Temperature Compressor High Discharge Temperature...
- Page 55 Test Run Display Title Cause of Error Outdoor Unit 3 Phase Power Outdoor Unit R-T Phase Difference is over 5A unbalance Outdoor Unit Fan CT Sensor Error Outdoor Unit Fan CT Sensor open or short Outdoor Unit Fan DC Link High Outdoor Unit Fan DC Link High Voltage Error Voltage Error Outdoor Unit Fan Over Current...
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Page 56: Caution For Refrigerant Leak
Caution For Refrigerant Leak Caution For Refrigerant Leak The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available. Introduction Though the R410A refrigerant is harmless and incombustible itself , the room to equip the air conditioner should be large to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room. - Page 57 Caution For Refrigerant Leak (3) With partition and without opening which serve as passage of air to adjoining room Outdoor unit Indoor unit Smallest room n Calculate refrigerant concentration Total amount of replenished In case the result of calculation exceeds refrigerant in refrigerant facility (kg) Refrigerant concentration the limiting concentration, perform the...
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Page 58: Installation Guide At The Seaside
2) Select a well-drained place. h 1. If you can’t meet above guide line in the seaside installation, please contact LG Electronics 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. - Page 59 [Representative] LG Electronics Inc. EU Representative Krijgsman 1, 1186 DM Amstelveen, The Netherlands [Manufacturer] LG Electronics Inc. Changwon 2nd factory 84, Wanam-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA...