LG MULTI V Installation Manual
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LG MULTI V Installation Manual

R410a refrigerant
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Table of Contents

See also: Service Manual , Owner's Manual
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 : ARUN Series
P/NO : MFL67221404
www.lg.com

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Summary of Contents for LG MULTI V

  • 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 : ARUN Series www.lg.com P/NO : MFL67221404...
  • Page 2 IMPORTANT! Please read this instruction sheet completely before installing the product. 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. WARNING •...

  • Page 3: Table Of Contents

    ARUN Series Outdoor unit Installation Manual TABLE OF CONTENTS Safety Precautions .................4 Installation Process................8 Outdoor units Information ..............9 Environment-friendly Alternative Refrigerant R410A .......14 Select the Best Location..............15 Installation Space .................16 Lifting method..................18 Installation.....................19 Refrigerant piping installation.............24 Pipe connections between indoor and outdoor unit......28 Electrical Wiring ...................54 Test Run....................81 New Function ..................101...

  • Page 4: 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. This symbol indicates the possibility of death or serious injury.
  • Page 5 Safety Precautions When installing and moving the air condi- Do not reconstruct to change the settings of tioner to another site, do not charge it with a the protection devices. different refrigerant from the refrigerant specified on the unit. • If a different refrigerant or air is mixed with the •...
  • Page 6 Safety Precautions 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 7 Safety Precautions Be very careful about product transportation. • Only one person should not carry the product if it weighs more than 44lbs (20kg). • Some products use PP bands for packaging. Do not use any PP bands for a means of transportation. It is dangerous.

  • Page 8: Installation Process

    Installation Process Installation Process Indicate clearly who will be responsible for switch setting. Determination of division work Preparation of contract drawings Make connection clearly between outdoor, indoor, remote controller and option. Take account of gradient The foundation must be level even Sleeve and insert work Outdoor unit foundation work of drain piping...

  • Page 9: Outdoor Units Information

    Outdoor units Information Outdoor units Information n Combination Ration(50~130%) Outdoor Number Connection Capacity Single outdoor unit 130% Double outdoor units 130% Triple outdoor units 130% Notes: * We can guarantee the operation only within 130% Combination. Power Supply: Outdoor Unit (3Ø, 208/230V, 60Hz) n Heat pump Unit 1 Outdoor Unit...
  • Page 10 Outdoor units Information Unit 2 Outdoor Unit System ARUN216BT3 ARUN240BT3 ARUN264BT3 ARUN072BT3 ARUN096BT3 ARUN121BT3 Model ARUN144BT3 ARUN144BT3 ARUN144BT3 14.9 Product Charge 32.8 Max. Connectable No. of Indoor Units (190 × 1) + (280 × 1) 280 × 2 280 × 2 Net Weight (418 ×...
  • Page 11 Outdoor Units Information Unit 3 Outdoor Unit System ARUN432BT3 ARUN144BT3 Model ARUN144BT3 ARUN144BT3 28.2 Product Charge 62.1 Max. Connectable No. of Indoor Units 280 × 3 Net Weight 617 × 3 (1,240×1,680×760)×3 Dimensions (WxHxD) inch (48.8×66.1×29.9)×3 Connecting Liquid Pipes[mm(inch)] 19.05(3/4) Pipes Gas Pipes[mm(inch)] 41.3(1 5/8)
  • Page 12 Outdoor Units Information Unit 2 Outdoor Unit System ARUN216DT3 ARUN240DT3 ARUN264DT3 Model ARUN072DT3 ARUN096DT3 ARUN120DT3 ARUN144DT3 ARUN144DT3 ARUN144DT3 14.9 Product Charge 32.8 Max. Connectable No. of Indoor Units (190 × 1) + (270 × 1) 270 × 2 270 × 2 Net Weight (418 ×...
  • Page 13 Outdoor Units Information Unit 3 Outdoor Unit System ARUN432DT3 ARUN144DT3 Model ARUN144DT3 ARUN144DT3 28.2 Product Charge 62.1 Max. Connectable No. of Indoor Units 270 × 3 Net Weight 595 × 3 Dimensions (1,240×1,680×760)×3 inch (48.8×66.1×29.9)×3 (WxHxD) Connecting Liquid Pipes[mm(inch)] 19.05(3/4) Pipes Gas Pipes[mm(inch)] 41.3(1 5/8)

  • Page 14: 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 15: Select The Best Location

    Select the Best Location Select the Best Location 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 • No exposition to strong wind •...

  • Page 16: Installation Space

    Installation Space Installation Space Individual Installation n During the installation of the unit, consider service, inlet, and outlet and acquire the minimum space as shown in the figures below. Case 1 Case 2 Category Installation Space (10mm≤Space A, C≤49mm) (Space A, C≥49mm) A≥10(13/32”) A≥50(1-31/32”) B≥300(11-13/16”)
  • Page 17 Installation Space Seasonal wind and cautions in winter • Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well. • Get ready for seasonal wind or snow in winter even in other areas. •...

  • Page 18: Lifting Method

    Lifting Method Lifting method • When carrying the suspended, unit 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 19: Installation

    Installation Installation • Install at places where it can endure the weight and vibration/noise of the outdoor unit. • The outdoor unit supports at the bottom shall have width of at least 100mm(3-15/16 inch) under the units legs before being fixed. •...
  • Page 20 Installation Foundation for Installation • Fix the unit tightly with bolts as shown below so that unit will not fall down due to earthquake or gust. • Use the H-beam support as a base support • Noise and vibration may occur from the floor or wall since vibration is transferred through the installation part depending on installation status.
  • Page 21 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 lo- Copper Slanted Uneven Rough tube...
  • Page 22 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 23 Installation HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 248℉(120℃)). Fastening band 2. Precautions in high humidity circumstance: (accessory) This air conditioner has been tested according to the "ISO Conditions with Mist" and confirmed that there is not any default.

  • Page 24: Refrigerant Piping Installation

    Refrigerant piping installation Refrigerant piping installation Precautions on Pipe connection / Valve operation Pipe connection is done by connecting from the end of the pipe to the branching pipes, and the refrigerant pipe coming out of the outdoor unit is divided at the end to connect to each indoor unit. Flare connec- tion for the indoor unit, and welding connection for the outdoor pipe and the branching parts.
  • Page 25 125(4-29/32) 110(4-11/32) 120(4-23/32) 110(4-11/32) For more information, refer accessory installation manual. Common pipes I.D.3/4(19.05) O.D.3/4(19.05) I.D.3/4(19.05) O.D.3/4(19.05) Field Supply (Not provided by LG) Facing Facing Y branch downwards upwards Within +/- 10 Viewed from point A To outdoor unit in direction of arrow To branch piping or indoor unit Within ±...
  • Page 26 To Outdoor Unit Sealed Piping 9. The Multi V will stop due to an abnormality like excessive or insufficient refrigerant. At such a time, always properly charge the unit. When servicing, always check the notes concerning both the piping length and the amount of additional refrigerant.
  • Page 27 Refrigerant piping installation 12. Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling per- formance, 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 28: Pipe Connections Between Indoor And Outdoor Unit

    Pipe connections between indoor and outdoor unit Pipe connections between indoor and outdoor unit • Pipe connections can be done on the front side or on the side according to the installation environments. • Be sure to let 2.8psi(0.2kgf/cm²) Nitrogen flow in the pipe when welding. •...
  • Page 29 Pipe connections between indoor and outdoor unit n Remove leakage prevention cap Service Port • Remove the leakage prevention cap attached to the out- door unit service valve before pipe work. • Proceed the leakage prevention cap removal as follows: 1.
  • Page 30 Pipe connections between indoor and outdoor unit n Method of drawing out pipes on the bottom side ① Drawing out common pipe through side panel Common pipe Liquid pipe Gas pipe Remove only liquid/gas pipe Knock Out View without base pan ②...
  • Page 31 Pipe connections between indoor and outdoor unit Refrigerant piping system u Y branch method 1 Outdoor Units Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Indoor Units L492ft(150m) (656ft(200m) : Conditional application) l 131ft(40m) (295ft(90m) : Conditional application) 49ft(15m) 2 Outdoor Units...
  • Page 32 Pipe connections between indoor and outdoor unit 3 Outdoor Units Slave2 Slave1 Example : 5 Indoor Units Master connected Ⓐ : Outdoor Unit 323ft (10m) or ODU Capacity Ⓑ : 1st branch (Y branch) less Master ≥ Slave1 ≥ Slave 2 Ⓒ...
  • Page 33 Pipe connections between indoor and outdoor unit Ú Refrigerant pipe diameter from branch to branch (B,C,D) Liquid pipe Gas pipe Downward Indoor Unit total capacity [inch(mm)] [inch(mm)] [kW(Btu/h)] ≤ 5.6(19,100) 1/4(Ø6.35) 1/2(Ø12.7) < 16.0(54,600) 3/8(Ø9.52) 5/8(Ø15.88) ≤ 22.4(76,400) 3/8(Ø9.52) 3/4(Ø19.05) <...
  • Page 34 Pipe connections between indoor and outdoor unit Header Method 1 Outdoor Unit Example : 6 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch Ⓒ : Indoor Units Ⓓ : Sealed piping L 656ft(200m) 131ft(40m) 49ft(15m) 2 Outdoor Units Slave Slave Slave...
  • Page 35 Pipe connections between indoor and outdoor unit 3 Outdoor Units Slave2 Slave1 Example : 6 Indoor Units connected Master Ⓐ : Outdoor Unit ODU Capacity Ⓑ : Header branch Master ≥ Slave1 ≥ Slave2 33ft (10m) Ⓒ : Indoor Units or less Ⓓ...
  • Page 36 Pipe connections between indoor and outdoor unit u Combination of Y branch/header method 1 Outdoor Units Example : 5 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : 1st branch (Y branch) Ⓒ : Y branch Ⓓ : Indoor Unit Ⓔ...
  • Page 37 Pipe connections between indoor and outdoor unit 3 Outdoor Units Slave2 Slave1 Example : 5 Indoor Units connected Master Ⓐ : Outdoor Unit ODU Capacity Ⓑ : 1st branch(Y branch) 33ft Master ≥ Slave1 ≥ Slave2 (10m) Ⓒ : Y branch or less Ⓓ...
  • Page 38 Pipe connections between indoor and outdoor unit Ú Refrigerant pipe diameter from branch to branch (B,C) Liquid pipe Gas pipe Downward Indoor Unit total capacity [inch(mm) [inch(mm) [kW(Btu/h)] ≤ 5.6(19,100) Ø6.35(1/4) Ø12.7(1/2) < 16.0(54,600) Ø9.52(3/8) Ø15.88(5/8) ≤ 22.4(76,400) Ø9.52(3/8) Ø19.05(3/4) <...
  • Page 39 Pipe connections between indoor and outdoor unit u Outdoor unit Connection WARNING • In case of pipe diameter B connected after first branch is bigger than the main pipe diameter A, B should be of the same size with A. Ex) In case indoor unit combination ratio 120% is connected to 70kW outdoor unit.
  • Page 40 Pipe connections between indoor and outdoor unit u Pipe Connection Method/Precautions for Series connections between Outdoor units - Separate Y branch joints are needed for series connections between outdoor units. - Please refer to the below connection examples to install pipe connections between outdoor units. n Pipe connection between outdoor units (General Case) The maximum pipe length...
  • Page 41 Pipe connections between indoor and outdoor unit • The pipes between the outdoor units must maintain level or give an inclination to prevent a back flow toward the slave outdoor unit. Otherwise, the unit may not operate properly. (Example 1) Toward indoor unit Toward indoor unit (Example 2)
  • Page 42 Pipe connections between indoor and outdoor unit • When connecting the pipes between the outdoor units, the accumulation of oil in the slave outdoor unit should be avoided. Otherwise, the unit may not operate properly. (Example 1) Toward indoor unit Toward indoor unit (Example 2) Toward indoor unit...
  • Page 43 Pipe connections between indoor and outdoor unit u The amount of Refrigerant The calculation of the additional charge should take into account the length of pipe and CF(correction Factor) value of indoor unit. Total liquid pipe Additional charge(kg) 0.323(lbs/ft) :Ø25.4 mm (1.0 inch) Total liquid pipe 0.238(lbs/ft) :Ø22.2 mm (7/8 inch)
  • Page 44 Pipe connections between indoor and outdoor unit 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 (0.028 (lbs/ft³)) 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 45 Pipe connections between indoor and outdoor unit Distribution Method 1. Line Distribution Slave Master Slave 3rd main pipe distribution Master Slave Master Main pipe Distribution Main pipe Distribution 2. Vertical Distribution Ensure that the branch pipes are attached vertically. Slave Master Slave Master...
  • Page 46 Pipe connections between indoor and outdoor unit 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...
  • Page 47 Pipe connections between indoor and outdoor unit • 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 48 Pipe connections between indoor and outdoor unit u 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) I.D12.7(1/2) (2-29/32) ARBLN01621 (2-29/32) I.D9.52(3/8) 281(11-1/16) 281(11-1/16) 292(11-1/2) 292(11-1/2) I.D19.05(3/4) I.D12.7(1/2) O.D15.88(5/8) O.D9.52(3/8) 70(2-3/4) 70(2-3/4) I.D22.2(7/8)
  • Page 49 Pipe connections between indoor and outdoor unit u 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) (4-23/32) ID15.88(5/8) (4-23/32) ID12.7(1/2) ID9.52(3/8) ID15.88(5/8) ID19.05(3/4) 540(21-1/4) 540(21-1/4) 120(4-23/32) 120(4-23/32) ID12.7(1/2)
  • Page 50 Pipe connections between indoor and outdoor unit Leak Test and Vacuum drying (1) Leak test Leak test should be made by pressurizing nitrogen gas to 3.8Mpa(551.1psi). 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 51 Pipe connections between indoor and outdoor unit (2) Vacuum Vacuum drying should be made from the service port provided on the outdoor unitʼs service valve to the vac- uum 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 52 Pipe connections between indoor and outdoor unit 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 ODU power reset Master unit PCB DIP switch off - Heat pump : switch off 11, 14 - Cooling only : switch off 11, 14...
  • Page 53 Pipe connections between indoor and outdoor unit 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 54: Electrical Wiring

    Electrical Wiring Electrical Wiring 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 55 Electrical Wiring Outdoor Unit Outdoor Unit Master Slave1 Slave2 Master Slave1 Slave2 Indoor Indoor Indoor Indoor Unit Unit Unit Unit Remote Remote Remote Remote controller controller controller controller Outdoor Unit Outdoor Unit Master Slave1 Slave2 Master Slave1 Slave2 Indoor Indoor Indoor Indoor Unit...
  • Page 56 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 transmission line between main and sub outdoor unit through the terminal block. - Connect transmission lines between outdoor unit and indoor units through the terminal block.
  • Page 57 Electrical Wiring Transmission and Power Lines 1) Communication cable • Type : shielding wire • Use wires of size : over 1.0~1.5mm • Maximum allowable line length: under 1,000m(3,281ft) 2) Remote control cable • Type : 3-core cable(shielding wire) 3) Central control cable Product type Wire type Diameter...
  • Page 58 Electrical Wiring 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 59 Electrical Wiring Field Wiring(3Ø, 208/230V) 1. 60Hz u Example Connection of Transmission Cable n 1 Outdoor Unit - 3Ø, 208/230V Power supply 3 Phase 3 Wires 60Hz 208/230V [Outdoor Unit] (Main Switch) R S T Switch ELCB Power supply Power supply 1 Phase 60Hz 1 Phase 60Hz 220~240V...
  • Page 60 Electrical Wiring n 2 Outdoor Units - 3Ø, 208/230V ■ Do not install the power source connected in series between the units. Power supply 3 Phase 3 Wires 60Hz 208/230V [Master] [Master] [Slave] (Main Switch) R S T R S T Switch Switch ELCB...
  • Page 61 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 62 Electrical Wiring n 3 Outdoor Units - 3Ø, 208/230V ■ Do not install the power source connected in series between the units. Power supply 3 Phase 3 Wires 60Hz 208/230V [Master] [Master] [Slave1] [Slave1] [Slave2] (Main Switch) R S T Switch ELCB ELCB...
  • Page 63 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 64 Electrical Wiring Field Wiring(3Ø, 460V) 1. 60Hz u Example Connection of Communication Cable n 1 Outdoor Unit - 3Ø, 460V Power supply 3 Phase 3 Wires 60Hz 460V [Outdoor Unit] (Main Switch) R S T Switch ELCB Power supply 1 Phase 60Hz 220~240V Power Line (3 Wires Cable)
  • Page 65 Electrical Wiring n 2 Outdoor Units - 3Ø, 460V ■ When the power source is connected in series between the units. Power Supply 3phase 3wires 60Hz 460V [Master] [Slave] (Main Switch) R S T Switch ELCB Power Supply 1phase 60Hz 220~240V Power Line (3 Wires Cable)
  • Page 66 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 67 Electrical Wiring n 3 Outdoor Units - 3Ø, 460V ■ When the power source is connected in series between the units. Power supply 3 Phase 3 Wires 60Hz 460V [Master] [Slave1] [Slave2] (Main Switch) R S T Switch ELCB Power supply 1 Phase 60Hz 220~240V Power Line...
  • Page 68 Electrical Wiring WARNING • Indoor Unit ground Lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise effect and motor current leakage (without connection to pipe). • Don't install an individual switch or electrical outlet to disconnect each of indoor unit separately from the power supply. •...
  • Page 69 Electrical Wiring u Example Connection of Transmission Cable [BUS type] [STAR type] • Connection of transmission cable must be in- • Abnormal operation can be caused by communi- stalled like below figure between indoor unit to cation defect, when connection of transmission outdoor unit.
  • Page 70 Electrical Wiring u UX2 Chassis Wire Connection (3Ø, 208/230V) Left Side Right Side Main Power Main Power Main Power Main Power Terminal Block Terminal Block Terminal Block Terminal Block Power/Ground lines Power/Ground lines Ground Cable Ground Cable Over 50mm Gap Over 50mm Gap Communication line Communication line...
  • Page 71 Electrical Wiring u UX3 Chassis Wire Connection (3Ø, 208/230V) Right Side Left Side Main Power Terminal Block Main Power Main Power Main Power Main Power Main Power Main Power Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Power/Ground lines Power/Ground lines Ground Cable...
  • Page 72 Electrical Wiring u UX2 Chassis Wire Connection (3Ø, 460V) Left Side Right Side Main Power Terminal Block Main Power Main Power Main Power Main Power Main Power Main Power Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Power/Ground lines Power/Ground lines Ground Cable...
  • Page 73 Electrical Wiring u UX3 Chassis Wire Connection (3Ø, 460V) Right Side Left Side Main Power Terminal Block Main Power Main Power Main Power Main Power Main Power Main Power Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Terminal Block Power/Ground lines Power/Ground lines Ground Cable...
  • Page 74 Electrical Wiring Location of setting dip switch n Heat Pump (Main PCB) SW01B SW02B 7 - Segment SW02V (Auto Addressing) Outdoor Unit...
  • Page 75 Electrical Wiring DIP switch setting n Checking according to dip switch setting 1. You can check the setting values of the Master outdoor unit from the 7 segment LED. The dip switch setting should be changed when the power is OFF. 2.
  • Page 76 Electrical Wiring n Setting the DIP switch • Heat pump • 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. Index 10 11 12 13 14 ●...
  • Page 77 Electrical Wiring Automatic Addressing • The address of indoor units would be set by auto addressing n Heat Pump (Main PCB) 1) Wait for 3 minutes after supplying power. (Master and Slave outdoor units, indoor units) 2) Press RED button of the outdoor units for 5 SW01B SW02B seconds.
  • Page 78 Electrical Wiring u The Procedure of Automatic Addressing Power On Waiting 3 minutes Press RED Button for 5 sec. (H/P : SW02V) Auto addressing start 7-segment LED = 88 Don’t press RED Button (H/P : SW02V) • Auto addressing setting end Numbers of indoor unit connection set whose Waiting about 2~7 minutes addressing is completed are indicated for 30seconds...
  • Page 79 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 transmission lines connected to INTERNET terminal should be connected to central control of Outdoor Unti with care for their polarity( A ’...
  • Page 80 ❈ Communication line length can be maximum 300m, use communication line as thick as 1.25mm 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.

  • Page 81: Test Run

    Check and confirm that there are no error messages in the display of indoor units or remote controls and LED in outdoor units. CAUTION when cutting main power of the Multi V • Always apply main power of the outdoor unit during use of product (cooling season/heating season).
  • Page 82 When system fault occurs, the error code is displayed at indoor unit display or remote control display, the trouble shooting guide is in the service manual Add Note : For detailed information, please refer Multi V Troubleshooting Guide Book Outdoor Unit...
  • Page 83 Test Run Sensor Checking Function Sensor checking function judges whether the current temperature of indoor and outdoor unit sensors is right or not. 3 indoor temperature sensors, 10 outdoor temperature sensor Note 1), 2 outdoor pressure sensors. Start DIP Switch Settings - Setting1 3 minutes (Refrigerant Auto Recharge)
  • Page 84 Test Run Refrigerant Auto Charging 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. Start Wait for 3 min. after power reset Set the Dip S/W. (Refer to DIP S/W setting) Press the black button.
  • Page 85 Test Run Liquid Pip Liquid Pipe Liquid Pipe Gas Pip Gas Pipe Gas Pipe 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.
  • Page 86 Test Run Refrigerant Checking Function This function judges refrigerant leakage and overcharging It can be used with refrigerant auto charging function. Inspection Start Press black button for 2 seconds Display Error Proper Temperature Thermo off indoor unit Decide Refrigerant Quantity Display Error Based on Refrigerant Quantity Press black button for 2 seconds...
  • Page 87 Test Run CAUTION 1. Guaranteed Temperature range(Error occurs out of guaranteed temperature range) IDU : 20°C(68°F) ~ 32°C(90°F) ODU : 0°C(32°F) ~ 43°C (109°F) 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 88 Test Run Integrated Test Running Function_Cooling Mode (Setting 3) This function is checking process for normal operation of parts and system On operating system. • All processes carry out included refrigerant amount judge logic and check normal condition of parts on cool- ing mode.
  • Page 89 Test Run Integrated Test Running Function_Heating Mode (Setting 4) This function is checking process for normal operation of parts and system On operating system. • All processes carry out included refrigerant amount judge logic and check normal condition of parts on heating mode.
  • Page 90 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. Max. RPM setting method RPM / Time Settings Capacity Capacity Set the DIP S/W...
  • Page 91 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 ODU power reset Set the DIP S/W OFF Power reset Set the DIP S/W ON Vacuum mode cancellation...
  • Page 92 Test Run Static pressure compensation mode This function secures the air flow rate of ODU, in case static pressure has been applied like using duct at fan discharge of ODU. n Static pressure compensation dip S/W setting method High static pressure mode : Set DIP S/W Static pressure compensation mode cancellation Static pressure compensation mode setting method...
  • Page 93 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 94 Test Run Display Title Cause of Error Master Outdoor Unit Inverter Com- DC charging is not performed at Master Outdoor Unit after starting relay turn on. pressor DC link Low Voltage Slave1 Outdoor Unit Inverter Com- DC charging is not performed at Slave1 Outdoor Unit pressor DC link Low Voltage after starting relay turn on.
  • Page 95 Test Run Display Title Cause of Error Master Outdoor Unit Constant Speed Com- System is turned off by Master Outdoor Uunit Constant Speed Com- pressor1 High Discharge Temperature pressor1 High Discharge Temperature Slave1 Outdoor Unit Constant Speed Com- System is turned off by Slave1 Outdoor Unit Constant Speed Com- pressor1 High Discharge Temperature pressor1 High Discharge Temperature Slave2 Outdoor Unit Constant Speed Com-...
  • Page 96 Test Run Display Title Cause of Error Master Outdoor Unit Air Tempera- Master Outdoor Unit Air Temperature Sensor open or ture Sensor Fault short Slave1 Outdoor Unit Air Tempera- Slave1 Outdoor Unit Air Temperature Sensor open or ture Sensor Fault short Slave2 Outdoor Unit Air Tempera- Slave2 Outdoor Unit Air Temperature Sensor open or...
  • Page 97 Test Run Display Title Cause of Error Omitting connection of Master outdoor unit Omitting connection of R, S, T power of Master Outdoor Unit Omitting connection of Slave1 Outdoor Unit Omitting connection of R, S, T power of Slave1 Outdoor Unit Omitting connection of Slave2 Outdoor Unit Omitting connection of R, S, T power of Slave2 Outdoor Unit...
  • Page 98 Test Run Display Title Cause of Error Constant2 CT Sensor Error of Constant2 CT Sensor open or short of Master Outdoor Master Outdoor Unit Unit Constant2 CT Sensor Error of Constant2 CT Sensor open or short of Slave1 Outdoor Slave1 Outdoor Unit Unit Constant2 CT Sensor Error of Constant2 CT Sensor open or short of Slave2 Outdoor...
  • Page 99 Test Run Display Title Cause of Error Failing to receive Slave Unit signal at main PCB of Communication Error Between Master Outdoor Unit Master Outdoor Unit and Other Outdoor Unit Failing to receive master and other Slave Unit signal at Communication Error Between 1 0 4 2 main PCB of Slave1 Outdoor Unit...
  • Page 100 Test Run Display Title Cause of Error 1 Master Outdoor Unit Constant Speed Comp locking, Check Valve leakage, comp dielectric break Compressor Fault down at Master Outdoor Unit Slave1 Outdoor Unit Constant Speed Comp locking, Check Valve leakage, comp dielectric at 1 7 3 Compressor Fault Slave1 Outdoor Unit...

  • Page 101: New Function

    New Function New Function n Multi V III provides as following new functions. New Function Applied item Cooling/ Heating/ Fan Cool/Heat selector (PRDSBM) Cooling/ Heating/ All OFF Solution Accessory Demand control -. Low load operation -. DDC control (DC0~10V Input)
  • Page 102 New Function 1. Cool/ Heat selector Cool/ Heat Selector has provided two different functions. - Cooling/ heating/ Fan lock mode - Cooling/ heating/ All OFF mode [Installation] 1. Check the contents of Cool/ Heat Selector <Outdoor Dry Contact Main Body> <Front Case>...
  • Page 103 New Function 2. ODU Dry contact ODU Dry contact has provided Three different functions. - Demand control - Night Low Noise control - Error Alarm Monitoring function [ODU Dry contact] 1. SWDIP : Switch to select main function - Feature and Parts Naming 2.
  • Page 104 New Function 2. ODU Dry contact with Central controller : With Single Outdoor unit Multi-V WIRE ASSY 1(1EA) CN_OUT : With Series Outdoor units Multi-V WIRE ASSY 1(1EA) BUS_A Central Control BUS_B Devices CN_OUT Outdoor Unit...
  • Page 105 <With External power source> SW_VOLT2 SW_VOLT1 SW_VOLT2 SW_VOLT1 Notes Do not input the voltage signal in LG does not LG does not "NON VOLT" setting mode otherwise Connect separate supply this section supply this section it will cause serious damage...
  • Page 106 New Function 2. Using Analog signal with DDC Module SW_VOLT2 SW_VOLT1 DC 0~10V input Direct Digital Controller [Control Value] - Using Contact signal Cooling Heating Rotary Volt 100% Step Control Step Control Not-Control Not-Control 100% 100% Comp. System Control Comp OFF Comp OFF Signal Input...
  • Page 107 New Function - Using Analog signal with DDC Module Comp capacity Input_1 Input_2 Input_3 STEP Of outdoor unit(%) No control 100% COMP OFF No control COMP OFF No control Comp. System Control COMP OFF Signal No control Input Step ALL OFF No control ALL OFF No control...
  • Page 108 New Function 2.2 Night Low Noise control ODU Dry contact has provided Two methods for Night Low Noise Control - Automatically operating : Using previous method - Manual operating : Using simple switch and timer [Setting] - For ODU Dry contact Position Function L1 2 3 4...

  • Page 109: 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 110 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) ≤...

  • Page 111: Installation Guide At The Seaside

    Installation guide at the seaside Installation guide at the seaside CAUTION 1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced. 2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the product.
  • Page 112 Outdoor Unit...
  • Page 113 LG Customer Information Center 888-865-3026 USA, press #2  for PTAC, TTW 888-865-3026 LGEUS USA, press #3  for DFS, Multi V LG Electronics, Air conditioning Division 1-888-LG-Canada CANADA 1000 Sylvan Ave., Englewood Cliffs, NJ 07632 Register your product Online! LGECI LG ELECTRONICS CANADA INC.

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