LG ARWN Series Installation Manual
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LG ARWN Series Installation Manual

LG ARWN Series Installation Manual

Outside unit
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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.
P/NO : MFL63748906
www.lg.com

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Summary of Contents for LG ARWN Series

  • 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. www.lg.com P/NO : MFL63748906...

  • Page 2: Table Of Contents

    ARWN Series Outside unit Installation Manual TABLE OF CONTENTS Safety Precautions ......................3 Installation Process .......................7 Outside units Information....................8 Alternative Refrigerant R410A ..................9 Select the Best Location....................9 Installation space ......................10 Water control ........................11 Lifting method ......................13 Installation ........................14 Refrigerant piping installation ..................18 Device protection unit....................21...

  • 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. ■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the fol- lowing indications.
  • Page 4 Safety Precautions Ventilate before operating air conditioner when gas Securely install the cover of control box and the leaked out. panel. • It may cause explosion, fire, and burn. • If the cover and panel are not installed securely, dust or water may enter the outside unit and fire or electric shock may result.
  • Page 5 Safety Precautions Keep the unit away from children. The heat exchang- When installing the unit in a hospital, communica- er is very sharp. tion station, or similar place, provide sufficient pro- tection against noise. • It can cause the injury, such as cutting the finger. Also •...
  • Page 6 Safety Precautions WARNING • Refer to local code for all wiring size. • 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.

  • 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 outside, 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 Outside unit foundation work...

  • Page 8: Outside Units Information

    Outside units Information Outside units Information CAUTION Ratio of the connectable Indoor Units to the Outside: Within 50 ~ 130% Ratio of running Indoor Units to the Outside: Within 10 ~ 100% A combination operation over 100% cause to reduce each indoor unit capacity. Power Supply: Outside Unit (1Ø, 220-240V, 50Hz) Model (HP) Model...

  • Page 9: Alternative Refrigerant R410A

    Alternative Refrigerant R410A 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: Installation Space

    Installation space Installation space Required the minimum space as shown below for installation and check. If the space is not fit on this drawing, consult with LG. : Service area [Unit : mm(inch)] Product (Outside unit) Water pipe installation Service area...

  • Page 11: Water Control

    Water control Water control Water control • Keep the water temperature between 10~45°C (50~113°F). Other it may cause the breakdown. - Standard water supply temperature is 30°C (86°F) for Cooling and 20°C (68°F) for heating. • Properly control the water velocity. Otherwise it may cause the noise, pipe vibration or pipe contraction, expansion according to the temperature.
  • Page 12 Water control Standard table for water purity control The water may contain many foreign substances and hence may influence the performance and lifetime of the prod- uct due to the corrosion of the condenser and water pipe. (Use water source that complies with the below standard table for water purity control.) If you use water supply other than the tap water to supply the water for the cooling tower, you must do a water quality inspection.

  • Page 13: 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 fours points so that impact is not applied to the unit. •...

  • Page 14: Installation

    Installation Installation Location of anchor bolt [Unit : mm(inch)] 392 (15-7/16) The location of anchor bolt WARNING • Be sure to install unit in a place strong enough to withstand its weight. Any lack of strength may cause unit to fall down, resulting in a personal injury. •...

  • Page 15: Preparation Of Piping

    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. ■ Use the accessory piping kit or the pipes purchased Copper Slanted Uneven Rough locally.
  • Page 16 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 17 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.

  • Page 18: 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 19 Refrigerant piping installation Installation of water pipe 1) Water pipe system diagram • The water pressure resistance of the water pipe system of this product is 1.98MPa • When the water pipe passes indoors, make sure to execute heat insulation on the pipe so that water drops do not form on the outer side of the water pipe.
  • Page 20 Refrigerant piping installation Pipe thickness Shear stress Tensile stress Bending moment Torque (N . m) (kgf . m) (N . m) (kgf . m) inch (kN) (kgf) (kN) (kgf) 12.7 19.05 1,200 11.5 25.4 1 1.2 1,120 15.5 31.8 1 1/4 14.5 1,450 87.5...

  • Page 21: Device Protection Unit

    Device protection unit Device protection unit Strainer on water pipe To protect the water cooling type product, you must install a strainer with 50mesh or more on the heat water supply pipe. If not installed, it can result in damage of heat exchanger by the following situation. 1.
  • Page 22 Device protection unit Flow switch work • It is recommended to install the flow switch to the water collection pipe system Cover connecting to the outside unit. Micro-switch (Flow switch acts as the 1st protection device when the heat water is not sup- Adjustment screw plied.

  • Page 23: Refrigerant Piping System

    Refrigerant piping system Refrigerant piping system Y branch method Example : 5 Indoor Units connected [Unit:m(ft)] Ⓐ : Outside Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units L70 (230) l 40 (131) h15 (49) ➲ Total pipe length = A+B+C+D+a+b+c+d+e ≤ 145m (475.7ft) Longest pipe length Equivalent pipe length A+B+C+D+e ≤...
  • Page 24 Refrigerant piping system Header branch method ■ Header Method [Unit:m(ft)] Example : 6 Indoor Units connected Ⓐ : Outside Unit Ⓑ : 1st branch Ⓒ : Indoor Units Ⓓ : Sealed piping L70 (230) 40 (131) h15 (49) ➲ Total pipe length = A+a+b+c+d+e+f ≤ 145m (475.7ft) Longest pipe length * Equivalent pipe length A+f ≤...
  • Page 25 Refrigerant piping system Y/Header branch method ■ Combination of Y branch/header method [Unit:m(ft)] Example : 5 Indoor Units connected Ⓐ : Outside Unit Ⓑ : 1st branch (Y branch) Ⓒ : Y branch Ⓓ : Indoor Unit Ⓔ : Header Ⓕ...
  • Page 26 Refrigerant piping system Calculation of amount of refrigerant The calculation of the additional charge should take into account the length of pipe. Product Charge (kg(lbs)) Ex) 10HP Additional charge (kg(lbs)) Outside unit Header branch Total liquid pipe (m(ft)): Ø22.2mm (7/8inch) x 0.237lbs/ft Indoor unit Total liquid pipe (m(ft)): Ø19.05mm (3/4inch)
  • Page 27 Refrigerant piping system 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 28 Refrigerant piping system 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 Outside Unit...
  • Page 29 Refrigerant piping system 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 30 Refrigerant piping system 12. When connecting the refrigerant piping, make sure the service valves of the Outside Unit is completely closed (the factory setting) and do not operate it until the refrigerant piping for the Outside and Indoor Units has been connected, a refrigerant leakage test has been performed and the evacuation process has been completed.
  • Page 31 Refrigerant piping system - Pipe must be able to obtain the specified thickness and should be used with low impurities. - Also when handling storage, pipe must be careful to prevent a fracture, deformity and wound. Should not be mixed with contaminations such as dust, moisture. Refrigerant piping on three principles Drying Cleanliness...
  • Page 32 Refrigerant piping system Nitrogen substitution method Welding, as when heating without nitrogen substitution a large amount of the oxide film is formed on the inter- nal piping. The oxide film is a caused by clogging EEV, Capillary, oil hole of accumulator and suction hole of oil pump in compressor.
  • Page 33 Refrigerant piping system Selection of refrigerant piping Outside 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 Outside unit Outside unit capacity [mm (inch)] [mm (inch)] ①...
  • Page 34 Refrigerant piping system Branch pipe Fitting Y branch To Outside 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 35 Refrigerant piping system • 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 36: Thermal Insulation Of Refrigerant Piping

    Refrigerant piping system 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 37: Y Branch Pipe And Header Branch Pipe Type

    Y branch pipe and header branch pipe type Y branch pipe and header branch pipe type Y branch pipe [unit:mm (inch) Models Gas pipe Liquid pipe I.D12.7 (1/2) I.D12.7 (1/2) I.D9.52 (3/8) I.D6.35 (1/4) I.D15.88 (5/8) I.D15.88 (5/8) I.D6.35 (1/4) I.D9.52 (3/8) I.D15.88 (5/8) I.D6.35 (1/4)
  • Page 38 Y branch pipe and header branch pipe type Header [unit:mm (inch)] Models Gas pipe Liquid pipe 360 (14-5/32) 360 (14-5/32) 120 (4-23/32) 120 (4-23/32) ID12.7 (1/2) ID6.35 (1/4) ID6.35 (1/4) 4 branch ID12.7 (1/2) ID9.52 (3/8) ID15.88 (5/8) ID9.52 (3/8) (5-29/32) ARBL054 (5-29/32)

  • Page 39: Leakage Test And Vacuum

    Leakage test and vacuum Leakage test and vacuum Leak test Leak test should be made by pressurizing nitrogen gas to 3.8MPa (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 40 Leakage test and vacuum Vacuum Vacuum drying should be made from the service port provided on the outside unit’s service valve to the vacuum pump commonly used for liquid pipe, gas pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas pipe and high/low pressure common pipe with the service valve closed.) * Never perform air purging using refrigerant.

  • Page 41: Electrical Wiring

    Electrical Wiring Electrical Wiring 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 42 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 pro- tection circuit locally.
  • Page 43 Electrical Wiring Transmission and Power Lines 1) Transmission cable • Types : shielding wire • Diameter : over 1.25mm • Maximum allowable temperature: 60°C (140°F) • Maximum allowable line length: under 300m (984ft) 2) Remote control cable • Types : 3-core cable 3) Simple central control cable •...

  • Page 44: Wiring Of Main Power Supply And Equipment Capacity

    Electrical Wiring ◆ Wiring of Main Power Supply and Equipment Capacity 1. Use a separate power supply for the Outside Unit and Indoor Unit. 2. Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
  • Page 45 Electrical Wiring ◆ Example Connection of Transmission Cable Transmission line (3 line): Wired remote control Single Phase of power supply line Power supply switch Transmission line (2 shield line): Between Indoor Unit and Outside Unit (Switch fuse : ELCB) Single Phase of Power supply 50 Hz 220-240 V (Main Switch)
  • Page 46 Electrical Wiring ◆ Example Connection of Communication Cable [BUS type] • Connection of communication cable must be installed like below figure between indoor unit to outside unit. [STAR type] • Abnormal operation can be caused by communication defect, when connection of communication cable is installed like below figure(STAR type).
  • Page 47 Electrical Wiring Connection method of the connecting cable (Example) 1. Make a hole appropriate for the passage of connection cable through on cap by tool. 2. After knocking out the holes, we recommend you paint the edges and areas around the edges using the repair paint to prevent rusting 3.

  • Page 48: Dip Switch Setting

    Electrical Wiring Dip switch setting 1. Location of setting switch SW01B SW02B 7 segment SW01B SW02B 1 2 3 4 1 2 3 4 CAUTION If the applicable dip switch is not set correctly, the prod- uct may not operate properly. 2.
  • Page 49 Electrical Wiring Function SW01B Setting SW02B Setting Remark Standard mode at Standard shipping factory 1 2 3 4 1 2 3 4 Forced Oil Return 1 2 3 4 1 2 3 4 Vacuum Mode 1 2 3 4 1 2 3 4 Water Pipe For water pipe Solenoid Solenoid Valve...
  • Page 50 Electrical Wiring Indoor unit auto addressing • The address of indoor units would be set by auto addressing 1) Wait for 3minutes after applying power supply. SW01B SW02B 2) Press the switch of the outside unit (SW02V) for 5seconds. 3) A "88" is indicated on 7-segment LED of the outside unit 7 segment PCB.
  • Page 51 Electrical Wiring Group Number setting Group Number setting for Indoor Units ① Confirm the power of whole system(Indoor Unit, Outside Unit) is OFF, otherwise turn off. ② The transmission lines connected to INTERNET terminal should be connected to central control of Outside 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 Outside Cool/Heat Selector in field. Connect signal terminal block as below figure and description.

  • Page 53: Test Run

    Test Run Test Run Water supply system test run • Before executing the test run for the product, you must first test the heat source water system. The test run for the product must be executed after checking the flow rate and temperature of the heat source water supplied.
  • Page 54 Test Run Precaution before test run Check whether the air is completely removed and the water supply is flowing smoothly. Check whether there is any refrigerant leakage of any disconnected or loose communication or power wire, or use the electric wiring diagram to check the wiring connection condition. Check whether the power and communication wire are connected.

  • Page 55: Maintenance Of Plate Type Heat Exchanger

    Test Run How to Cope with Abnormal Test Run Item Phenomenon Cause Checkpoint and resolution Check whether the heat source water supply pump is operating. When connecting the flow switch, Check whether the heat source water supply pipe is clogged. heat-sourced water doesn’t flow CH24 (Clean strainer, valve locked, valve issue, air trapped etc.)
  • Page 56 Test Run Daily check/management 1. Water quality control The plate type heat exchanger is not structured to be disassembled, cleaned or replaced with parts. To prevent corrosion or scaling on the plate type heat exchanger, special care must be taken to control the water quality. Water quality must satisfy the minimum criteria of the reference water quality items.
  • Page 57 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 outside unit control board as shown in the table.
  • Page 58 Test Run Display Error item Root cause of error Outside unit inverter DC link over-voltage Compressor turned off due to master outside unit inverter error DC voltage over-charge Outside unit inverter compressor over- Outside unit inverter compressor error or operating com- current ponent (IPM) error operation Outside unit inverter CT under-current...
  • Page 59 Test Run Display Error item Root cause of error Communication error with master outside When the indoor uint control signal is not received from unit contrller and indoor unit the master outside unit inverter controller Communication error between outside Failing to receive inverter contoroller signal at Outdoor unit inverter controller Unit controller Outside unit inverter PCB EEPROM error...

  • Page 60: Cooling Tower Applied Method

    Cooling tower applied method Cooling tower applied method Open type Closed type cooling tower cooling tower side side Heat exchange [Open type cooling tower + Second heat exchanger] [Closed type cooling tower] Heat exchanger is installed between the cooling Heat source water of the cooling tower is supplied tower and outside unit system piping, and the directly to the outside unit system.

  • Page 61: 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 62 Caution For Refrigerant Leak (3) With partition and without opening which serve as passage of air to adjoining room Outside unit Indoor unit Smallest room ■ 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...

  • Page 63: Water Solenoid Valve Control

    Water Solenoid Valve Control Water Solenoid Valve Control Central Control (Use DDC Port) Water Water CN_26 C_Box MAIN PCB CN_24 CN_22 Flow Switch INTERNET N 3(A) 3(B) 4(A) 4(B) Solenoid Valve Individual Control (Use 220-240 V Out Port) Water Water CN_26 C_Box MAIN PCB...

  • Page 64: Variable Water Flow Control Kit(Accessory)

    Variable Water Flow Control KIT(Accessory) Variable Water Flow Control KIT(Accessory) 1. Shut off the main power line of outdoor unit. 2. Install the VWFC(Variable Water Flow Control) PCB in the C/BOX by using screws. 3. Install the transformer in the C/BOX by using screws. 4.

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