LG ARUN50LH2A Installation Manual
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LG ARUN50LH2A Installation Manual

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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.
TYPE :
P/NO : MFL62603703
System
www.lg.com

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Summary of Contents for LG ARUN50LH2A

  • Page 1 • 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. TYPE : System www.lg.com P/NO : MFL62603703...

  • Page 2: Table Of Contents

    ARUN/ARUV Series Outdoor Unit Installation Manual TABLE OF CONTENTS Safety Precautions .......................3 Safety Precautions .......................3 Installation Process .....................7 Installation Process .....................7 Outdoor Units Information ..................8 Outdoor Units Information ..................8 Before installation ......................9 Before installation ......................9 Select the Best Location....................10 Select the Best Location....................10 Installation Space .......................11 Installation Space .......................11 Installation ........................15...

  • Page 3: Safety Precautions

    Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. n LG Electronics is not responsible for Product`s malfunction or damage which caused by improper installation or misuse of operation guide.
  • Page 4 Safety Precautions When installing and moving the air Do not reconstruct to change the settings of conditioner to another site, do not charge it the protection devices. with a different refrigerant from the refrigerant specified on the unit. • If a different refrigerant or air is mixed with the •...
  • Page 5 Safety Precautions ■ 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 that water is drained away properly based on the installation manual. • A bad connection may cause water leakage. Be very careful about product transportation. • Only one person should not carry the product if it weighs more than 20 kg. •...

  • Page 7: Installation Process

    Installation Process 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.Z Preparation of contract drawings (Prepare control circuit diagram) Take account of gradient Z The foundation must be level even Sleeve and insert work Outdoor unit foundation work...

  • Page 8: Outdoor Units Information

    Phase Heat Pump ARUN40LH2A 2 FAN 3Ø ARUN50LH2A ARUN60LH2A CAUTION: Ratio of the connectable Indoor Units to the Outdoor: Within 50 ~ 100% Power Supply: Outdoor Unit (3Ø, 380-415 V, 50 Hz / 3Ø, 380 V, 60 Hz) n Heat Pump...

  • Page 9: Before Installation

    Before Installation Before Installation 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 characteristic 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: Select The Best Location

    Select the Best Location Select the Best Location 1. Select space for installing outdoor unit, which will meet the following conditions: • No direct thermal radiation from other heat sources • No possibility of annoying neighbors by noise from unit •...

  • Page 11: Installation Space

    Installation Space Installation Space • The following values are the least space for installation. If any service area is needed for service according to field circumstance, obtain enough service space. • The unit of values is mm. ■ In case of obstacles on the suction side 1.
  • Page 12 Installation Space ■ In case of obstacles on the discharge side 1. Stand alone installation 2. Collective installation [Unit:mm] ■ In case of obstacles on the suction and the discharge side ➲ Obstacle height of discharge side is higher than the unit 1.
  • Page 13 Installation Space 2. Collective installation L > H L > H [Unit:mm] ➲ Obstacle height of discharge side is lower than the unit 1. Stand alone installation L ≤ H L ≤ H 2. Collective installation L ≤ H L ≤ H [Unit:mm] Installation Manual 13...
  • Page 14 Installation Space Collective / Continuous Installation for roof top use Space required for collective installation and continuous installation: When installing several units, leave space between each block as shown below considering passage for air and people. 1. One row of stand alone installation [Unit:mm] 2.

  • Page 15: Installation

    Installation Space Installation 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.) •...
  • Page 16 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. CopperZ ■ Use the accessory piping kit or the pipes purchased Slanted Uneven Rough tube 90°Z...
  • Page 17 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 18 Installation Heat insulation 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C). Fastening band Z (accessory) 2. Precautions in high humidity circumstance: This air conditioner has been tested according to the "KS Standard Conditions with Mist" and confirmed that there is not any default.

  • Page 19: Refrigerant Piping

    Refrigerant Piping Refrigerant Piping U3 Chassis ■ Connecting the pipes to the outdoor unit • Braze suitable field piping with service valve of gas pipe. CAUTION Take care so that there is no thermal damage on the service valves of the outdoor unit. Wet towel (Especially packing part of service port.) Wrap the service valve with a wet towel when brazing it as...
  • Page 20 Refrigerant Piping CAUTION • Make sure that pipe doesn't contact with the compressor terminal cover and comp bolt. • Always insulate the liquid and gas-side field piping and branch. Cautions for Handling Service Valve • The service valves are closed at shipment from the factory CAUTION Make sure to keep the valve open during operation The names of parts of the service valve are...
  • Page 21 Refrigerant Piping 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 22 Refrigerant Piping Refrigerant piping Taping Pipe to be brazed Valve Nitrogen Pressure-reducing valve WARNING When installing and moving the air conditioner to another site, be sure to make recharge refrigerant after perfect evacuation. - If a different refrigerant or air is mixed with the original refrigerant, the refrigerant cycle may malfunction and the unit may be damaged.
  • Page 23 Refrigerant Piping 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 capacity[kW(Btu/h)] [mm(inch)] [mm(inch)] Outdoor unit ①...
  • Page 24 Refrigerant Piping Allowable Length/Height Difference of Refrigerant Piping ■ Y Branch Method Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units L150m l 40m ➲ 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 25 Refrigerant Piping ■ Header Method Example : 6 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch Ⓒ : Indoor Units Ⓓ : Sealed piping L 150m ➲ Total pipe length = A+a+b+c+d+e+f ≤ 300m Longest pipe length Equivalent pipe length(*) A+f ≤...
  • Page 26 Refrigerant Piping ■ Combination of Y branch/header method Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Y branch Ⓓ : Indoor Unit Ⓔ : Header Ⓕ : Sealed piping L 150m Branch pipe can not be used after header ➲...
  • Page 27 Refrigerant Piping The Amount of Refrigerant The calculation of the additional charge should take into account the length of pipe. Product charge(kg) Length(m) of Additional charge(kg) x 0.061(kg/m) liquid pipe of Ø9.52mm Length(m) of x 0.022(kg/m) liquid pipe of Ø6.35mm Correction factor of outdoor unit Correction factor of...
  • Page 28 Refrigerant Piping CAUTION If a negative result is obtained from the calculation, no refrigerant needs to be added. 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 ≤...
  • Page 29 Refrigerant Piping Distribution Method 1. Line Distribution 3rd main pipe distributionZ 1stZ Main pipeZ Distribution 3ndZ Main pipeZ Distribution 2. Vertical Distribution Ensure that the branch pipes are attached vertically. 3. The others Header Installation Manual 29...
  • Page 30 Refrigerant Piping 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.) HorizontalZ FacingZ FacingZ plane downwards upwards Within +/- 10°Z Viewed from point AZ in direction of arrow Within ±...
  • Page 31 Refrigerant Piping • 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 • Fit branch pipe lie in a horizontal plane. Horizontal plane View from point B in the direction of the arrow •...
  • Page 32 Refrigerant Piping 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 I.D25.4...
  • Page 33 Refrigerant Piping 2. Header [unit:mm] Models Gas pipe Liquid pipe ID12.7 ID6.35 ID6.35 ID12.7 4 branch ID9.52 ID15.88 ID9.52 ARBL054 ID15.88 ID15.88 ID19.05 ID12.7 ID9.52 ID12.7 ID6.35 7 branch ID12.7 ID15.88 ID9.52 120 150 ARBL057 ID15.88 ID15.88 ID19.05 ID9.52 ID12.7 ID15.88 ID6.35 ID6.35...
  • Page 34 Refrigerant Piping Leak Test and Vacuum Drying 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 35 Refrigerant Piping 2. Vacuum Vacuum drying should be made from the service port provided on the outdoor unitʼs service valve to the vacuum 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 36 Refrigerant Piping 3. Refrigerant charging Follow following procedure to charge the refrigerant. 1. Open all service valves 2. Run the unit with cooling mode 3. Charging the refrigerant to gas service valve during operation. Charging during Open Open cooling operation Refrigerant cylinder CAUTION...
  • Page 37 Refrigerant Piping 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.

  • Page 38: Electrical Wiring

    Electrical Wiring Electrical Wiring Electrical Wiring 1. 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 electrical engineers do the electric work using special circuits in accordance with regulations and this installation manual.
  • Page 39 Electrical Wiring CAUTION • This product have reversed phase protection detector that only works when the power is turned on. If there exists black out or the power goes on and off which the product is operating, attach a reversed phase protection circuit locally. running the product in reversed phase may break the compressor and other parts.
  • Page 40 Electrical Wiring 2. Communication and Power Lines 1) Communication cable • Types : shielding wire • Cross section : over 1.0~1.5mm • Insulation material : PVC • Maximum allowable temperature: 60°C • Maximum allowable line length: 300m 2) Remote control cable •...
  • Page 41 Electrical Wiring Wiring of Main Power Supply and Equipment Capacity Outdoor unit (3Ø, 380~415V, 50Hz/ 3Ø, 380V, 60Hz) Indoor unit (1Ø,220V, 50/60Hz) 1. Separate power supply lines for the indoor units from outdoor unit. 2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
  • Page 42 Electrical Wiring ◆ 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 43 Example Connection of Communication Cable 1. 3Ø, 50Hz ◆ Example Connection of Communication Cable ■ ARUN40LH2A, ARUN50LH2A, ARUN60LH2A 3 Phase 4 Wires Power line(R, S, T, N) Single Phase of power supply line(L, N) Communication line (3 line): Wired remote control...
  • Page 44 Electrical Wiring 2. 3Ø, 60Hz ■ ARUN40LH2A, ARUN50LH2A, ARUN60LH2A 3 Phase 4 Wires Power line(R, S, T, N) Single Phase of power supply line(L, N) Communication line (3 line): Wired remote control Power supply switch Communication line (2 shield line): Between Indoor Unit and Outdoor Unit...
  • Page 45 Electrical Wiring ■ Example Connection of Communication Cable [BUS type] • Connection of communication cable must be installed like below figure between indoor unit to outdoor unit. [STAR type] • Abnormal operation can be caused by communication defect, when connection of communication cable is installed like below figure(STAR type).
  • Page 46 Electrical Wiring Location of DIP Switch Main PCB SW02V Auto addressing 1. When outdoor unit is powered on after configuring 7 - Segment SW01V Data confirm the DIP switch, proper input of configuration value can be verified through 7-Segment. 2. This function is shown only for 2 seconds after turning on the power.
  • Page 47 Electrical Wiring ■ Setting the DIP switch • 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 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 3 4 5 6 7...
  • Page 48 Electrical Wiring Automatic Addressing SW02V Auto addressing • The address of indoor units would be set by auto 7 - Segment SW01V addressing Data confirm 1) Wait for 3 minutes after applying power supply (outdoor unit, indoor unit). SW02B 2) Press the switch of the outdoor unit (SW02V) for 5 (DIP S/W) seconds.
  • Page 49 Electrical Wiring ◆ The Procedure of Automatic Addressing Power On All DIP switch should be off before auto adressing Waiting 3 minutes Press SW02V for 5 sec. Auto addressing start 7-segment LED = 88 • Auto addressing setting end Waiting about 2~7 minutes Numbers of indoor unit connection set whose addressing is completed are indicated for 30seconds on 7-segment LED after completing setting...
  • Page 50 Electrical Wiring ◆ How to connect central controller - The communication lines connected to INTERNET terminal should be connected to central control of Outdoor unti with care for their polarity( A → A, B → B ) - Connect communication lines between outdoor unit and indoor units through the terminal block. - When connecting communication line between outdoor unit and indoor units with shielded wire, connect the shield ground to the earth screw.
  • Page 51 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 52 Push Button ■ 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.

  • Page 53: Test Run

    Test Run Test Run Checks before Test Run 1. Test run should be performed after auto-addressing 2. Test run can be performed when 3 minutes passed after power on, by DIP switches and buttons. - needs time for initializing data of micom and readying communication with indoor unit. 3.
  • Page 54 Test Run Sensor Checking Function Note 1) Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or not. It checks 3 indoor temperature sensors, 9 outdoor temperature sensors, 2 outdoor pressure sensors. It is used for judging sensor abnormality. Note 2) Start Note...
  • Page 55 Test Run Sensor Check Error Code Display Error display during sensor inspection process is composed of 3 stages as shown below, and is proceeded by repeating these stages ■ Step 1 : Display of error existence : 309 or 319 - 309 : Inspect sensors of outdoor unit - 319 : Inspect sensors of indoor unit ■...
  • Page 56 Test Run Refrigerant Auto Charging Function This function charges appropriate amount of refrigerant automatically through cycle operation. It can be used when refrigerant amount Isn't certain because of SVC and leakage. Note Start 1. After installing the refrigerant charging device as shown below in figure, open the valve.
  • Page 57 Test Run Charging port manifold Capillary Assembly Procedure 1. Arrange manifold,capillary assembly, refrigerant vessel and scale 2. Connect manifold to the gas pipe service valve of ODU as shown in the figure. 3. Connect manifold and Capillary tube. Use designated capillary assembly only. If designated capillary assembly isn't used, the system may get damaged.
  • Page 58 Test Run Refrigerant Checking Function This function charges appropriate amount of refrigerant automatically through cycle operation. This function judges refrigerant leakage and overcharging. Start Note 1. In case air temperature is out of guaranteed Main temperature, refrigerant checking function may end Wait for 3 min.
  • Page 59 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20~32°C ODU : 10~38°C 2. Set IDU wired remote controller temperature sensor setting as 'IDU'. 3. Make certain that IDU doesn't run with thermo off mode during operation. [ Error contents about auto refrigerant charging function ] : Temperature Range Error (In case that IDU or ODU is out of range) : System Unstable Error (In case, After 45 min operating the system, it does not be stable)
  • Page 60 Test Run Night Silent Operation 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. U3 Chassis SW02V DIP switch No.12+14 ON SW01V SW01B Main PCB power reset SW01S...
  • Page 61 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 62 Test Run Display Title Cause of Error Outdoor Unit Inverter Compressor System is turned off by outdoor unit Inverter High Discharge Temperature Compressor High Discharge Temperature High Pressure of Outdoor Unit System is turned off by excessive increase of high pressure of outdoor unit Low Pressure of Outdoor Unit System is turned off by excessive decrease of low...

  • Page 63: 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 enough to such an extent that the refrigerant gas will not exceed the limiting concentration even if the refrigerant gas leaks in the room.
  • Page 64 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 ■ Calculate refrigerant concentration Total amount of replenished In case the result of calculation exceeds refrigerant in refrigerant facility (kg) ≤>...

  • Page 65: Installation Guide At The Seaside

    3) Select a well-drained place. 1. If you canZ 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...

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