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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 : MFL68460502
http://www.lghvac.com
www.lg.com

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Table of Contents

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   Summary of Contents for LG multi v

  • Page 1: Installation Manual

    • 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. http://www.lghvac.com www.lg.com P/NO : MFL68460502...
  • Page 2: Tips For Saving Energy

    TIPS FOR SAVING ENERGY TIPS FOR SAVING ENERGY Here are some tips that will help you minimize the power consumption when you use the air conditioner. You can use your air conditioner more efficiently by referring to the instructions below: •...
  • Page 3: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONS READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE. Always comply with the following precautions to avoid dangerous situations and ensure peak performance of your product WARNING It can result in serious injury or death when the directions are ignored CAUTION It can result in minor injury or product damage when the directions are ignored WARNING...
  • Page 4 IMPORTANT SAFETY INSTRUCTIONS • Use a vacuum pump or Inert(nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and do not use Flammable gases. Otherwise, it may cause fire or explosion. - There is the risk of death, injury, fire or explosion. •...
  • Page 5 IMPORTANT SAFETY INSTRUCTIONS CAUTION Installation • Always check for gas (refrigerant) leakage after installation or repair of product. - Low refrigerant levels may cause failure of product. • Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods. - It may cause a problem for your neighbors.
  • Page 6 IMPORTANT SAFETY INSTRUCTIONS • Safely dispose of the packing materials. - Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries. - Tear apart and throw away plastic packaging bags so that children may not play with them. If children play with a plastic bag which was not torn apart, they face the risk of suffocation.
  • Page 7: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS Branch pipe Fitting TIPS FOR SAVING ENERGY Leak Test and Vacuum drying IMPORTANT SAFETY IN- Vacuum Mode Thermal insulation of refrigerant piping STRUCTIONS ELECTRICAL WIRING INSTALLATION PROCESS Caution OUTDOOR UNITS IN- Control box and connecting position of wiring Communication and Power Cables FORMATION Wiring of main power supply and...
  • 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 CAUTION Combination Ration (50~130%) Outdoor Number Connection Ratio Single outdoor units 130% Double outdoor units 130% Triple outdoor units 130% Notes : * We can guarantee the operation only within 130% Combination. Power Supply : 3Ø, 575V, 60Hz Model Name : ARUB***CTE4 Unit Combination Unit...
  • Page 10 OUTDOOR UNITS INFORMATION Unit UX2+UX3 UX3+UX3 UX3+UX3 Combination Unit ARUB216CTE4 ARUB240CTE4 ARUB264CTE4 Model ARUB144CTE4 ARUB144CTE4 ARUB144CTE4 Name Independent Unit ARUB072CTE4 ARUB096CTE4 ARUB121CTE4 18.4 21.4 21.4 Refrigerant Precharged Amount 40.5 47.2 47.2 Number of maxmum connectable indoor units (195 × 1) + (285 × 1) (245 × 1) + (285 × 1) (245 × 1) + (285 × 1) Net Weight (430 ×...
  • Page 11 OUTDOOR UNITS INFORMATION Unit UX3+UX3+UX3 Combination Unit ARUB360CTE4 ARUB144CTE4 Model Name Independent Unit ARUB121CTE4 ARUB096CTE4 32.1 Refrigerant Precharged Amount 70.8 Number of maxmum connectable indoor units (245 × 2) + (285 × 1) Net Weight (540 × 2) + (628 × 1) (1,240×1,680×760)×3 Dimensions (WxHxD) inch...
  • Page 12: 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 13: 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 14 SELECT THE BEST LOCATION [Unit : mm(inch)] 481(18-15/16) 100(3-15/16) more (Serviceing space) 300(11-13/16) 300(11-13/16) more more (Servicing space) (Servicing space) 100(3-15/16) more (Serviceing space) Inspection door 450(17-23/32) 300(11-13/16) more more (servicing space) (Servicing space) (Servicing space) 450(17-23/32) 124(4-7/8) 61(2-13/32) 419(16-1/2) 137(5-13/32) 174(6-27/32) 174(6-27/32)
  • Page 15: Installation Space

    INSTALLATION SPACE INSTALLATION SPACE Individual Installation 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≤Side Space≤49mm) (Side Space≥49mm) A≥10(13/32”) A≥50(1-31/32”) B≥300(11-13/16”) B≥100(3-15/16”)
  • Page 16 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 17: 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 18: Installation

    INSTALLATION INSTALLATION • The outdoor unit supports at the bottom shall have width of at least 100mm(3-15/16 inch) under the Unit’s legs before being fixed. • The outdoor unit supports should nave minimum height of 200mm(7-7/8 inch). • Anchor bolt must be inserted at least 75mm(2-15/16 inch). For outdoor units should not be supported only by the corner supports.
  • Page 19: Foundation For Installation

    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 20: 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. Cut the pipes and the cable - Use the accessory piping kit or the pipes pur- Copper Slanted Uneven Rough tube chased locally.
  • Page 21 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 22 INSTALLATION Closing shutoff valve Remove the cap and turn the valve clockwise with the hexagon wrench. Securely tighten the valve until the shaft contacts the main body seal. Make sure to tighten the cap securely. * For the tightening torque, refer to the table on the below. Tightening torque Tightening torque N·m(lbs ·ft)(Turn clockwise to close) Shut off...
  • Page 23: Plumbing Materials And Storage Methods

    INSTALLATION Plumbing materials and storage methods 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 24 INSTALLATION Nitrogen substitution method Welding, as when heating without nitrogen substitution a large amount of the oxide film is formed on the internal piping. The oxide film is a caused by clogging EEV, Capillary, oil hole of accumulator and suction hole of oil pump in compressor.
  • Page 25: 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 and HR unit.
  • Page 26: Connection Of Outdoor Units

    REFRIGERANT PIPING INSTALLATION Connection of Outdoor units (Unit : mm(inch)) Low Pressure Gas Pipe Liquid Pipe High Pressure Gas Pipe Model Outdoor units I.D31.8(1-1/4) I.D34.9(1-3/8) 331(13-1/32) 416(16-3/8) I.D28.58(1-1/8) I.D25.4(1) I.D31.8(1-1/4) 408(16-1/16) 314(12-3/8) I.D.28.58(1-1/8) I.D.28.58(1-1/8) I.D.15.88(5/8) I.D.15.88(5/8) I.D31.8(1-1/4) I.D28.58(1-1/8) I.D28.58(1-1/8) I.D25.4(1) (4-3/8) I.D.12.7(1/2) I.D.22.2(7/8)
  • Page 27: Installation Of Outdoor Unit, Hr Unit And Indoor Unit Refrigerant Pipe

    REFRIGERANT PIPING INSTALLATION Installation of Outdoor Unit, HR Unit and Indoor Unit Refriger- ant Pipe 3 pipes are connected to the HR unit from the outdoor unit, classified into liquid pipe, low pres- sure gas pipe and high pressure gas pipe depending on status of refrigerant passing through the pipe.
  • Page 28: Type Of Hr Unit

    REFRIGERANT PIPING INSTALLATION Type of HR Unit Type of HR Unit Select an HR unit according to the number of the indoor units to be installed. HR units are classi- Select an HR unit according to the number of the indoor units to be installed. HR units are classi- fied into 3 types by the number of connectable indoor units.
  • Page 29: Installation Of Zoning Control

    REFRIGERANT PIPING INSTALLATION Installation of Zoning Control Some indoor unit can be connected to one port of HR unit. HR unit HR unit sealing Zoning control group 1 Zoning control group 2 (Max. 8 Indoor Units) (Max. 8 Indoor Units) Changeover under control Auto changeover Changeover under control...
  • Page 30 REFRIGERANT PIPING INSTALLATION [Reducers for indoor unit and HR unit] Unit : mm(inch) Gas pipe Models Liquid pipe High pressure Low pressure Indoor unit reducer OD9.52(3/8) Ø6.35(1/4) OD15.88(5/8) Ø12.7(1/2) OD19.05(3/4) Ø15.88(5/8) Ø12.7(1/2) OD22.2(7/8) Ø19.05(3/4) Ø15.88(5/8) PRHR021A OD9.52(3/8) Ø6.35(1/4) OD12.7(1/2) Ø9.52(3/8) OD15.88(5/8) Ø12.7(1/2) HR unit reducer...
  • Page 31: 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 envi- ronments. - Be sure to let 0.2kgf/cm (0.284lbs/in ) Nitrogen flow in the pipe when welding.
  • Page 32: Pipe Drawing Out During Single / Series Connection

    PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Remove leakage prevention cap • Remove the leakage prevention cap attached to the outdoor unit service valve before pipe work. • Proceed the leakage prevention cap removal as follows: - Verify whether the liquid/gas pipes are locked. - Extract remaining refrigerant or air inside using the service port.
  • Page 33 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Method of drawing out pipes on the bottom side - Drawing out common pipe through side panel Low Pressure Gas pipe Liquid pipe High Pressure Gas pipe Remove pipe knock out...
  • Page 34: Refrigerant Piping System

    PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Refrigerant piping system Refrigerant Pipe Connection 3 Outdoor Units Example : 12 Indoor Units connected Ⓐ : Outdoor Unit Ⓑ : Y branch Ⓓ : Indoor Unit Ⓔ : Connection branch pipe between Outdoor units : ARCNB31 Ⓕ...
  • Page 35 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT WARNING * : Serial connection of HR units : Capacity sum of indoor units ≤ 192.4 kBtu/hr • Refer to the HR unit PCB part for the valve group control setting. • It is recommended that difference in pipe lengths between an HR unit and indoor units, for example difference in length of a, b, c, and d, be minimized.
  • Page 36 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT (**) Conditional Application(Incase of D12 is the farthest indoor) Below condition must be satisfied for 40m(131ft) ~ 90m(295ft) piping length after first branch. 1) Diameter of pipes between first branch and the last branch should be increased by one step, except if the pipe diameter B,C3 is same as Diameter A(Main pipe diameter) Ø6.35(1/4) ’...
  • Page 37 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Y branch, Header and HR unit connection pattern Pattern 1 Pattern 2 • Impossible installation : HR unit Head branch • Impossible installation : Head branch pipe HR unit pipe Y and Head branch pipe. Pattern 3 Pattern 4 •...
  • Page 38 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Pattern 7 • * : Serial connection of HR units : Capacity sum of indoor units ≤ 192 kBtu/h Pattern 8 • * : Maximum indoor units per a branch are 8 indoor units Indoor Unit Y Branch pipe Head Branch pipe...
  • Page 39 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT 1) Keep the 40m(131ft) distance from the first branch to the farthest indoor. 1) under 40m(131ft) 5m(16ft) 15m(49ft) Indoor Indoor Indoor Indoor Y branch Unit Unit Unit Unit Keep the sum of indoor capacity under 58kW(192 kBtu/h). 1) under 40m(131ft) Indoor Indoor...
  • Page 40 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT 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 130% is connected to 20Ton(24HP(70kW)) outdoor unit. 1) Outdoor unit main pipe diameter A : Ø34.9(1-3/8, gas pipe), Ø15.88(5/8, liquid pipe) 2) Pipe diameter B after first branch according to 130% indoor unit combination(91kW): Ø34.9(1- 3/8, gas pipe), Ø19.05(3/4, liquid pipe)
  • Page 41 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT 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.
  • Page 42 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT - The pipes between the outdoor units must maintain horizontal levelness or give an inclination to prevent a back flow toward the slave outdoor unit. Otherwise, the unit may not operate prop- erly. (Example 1) Toward indoor unit Toward indoor unit...
  • Page 43 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT - When connecting the pipes between the outdoor units, the accumulation of oil in the slave out- door 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 44 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT The amount of Refrigerant The calculation of the additional charge should take into account the length of pipe and CF(correc- tion Factor) value of indoor unit. Additional charge(kg) Total liquid pipe : Ø25.4 mm (1.0 inch) x 0.480kg/m(0.323(lbs/ft)) Total liquid pipe : Ø22.2 mm (7/8 inch) x 0.354kg/m(0.238(lbs/ft))
  • Page 45: Refrigerant Charging

    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/ft Volume of the room at which Indoor Unit of the least capacity is installed If the above equation can not be satisfied, then follow the following steps.
  • Page 46: Branch Pipe Fitting

    PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Branch pipe Fitting Y branch Ⓐ To Branch Piping or Indoor Unit Ⓑ To Outdoor Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing Facing plane downwards...
  • 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 Y branch pipe [Unit:mm(inch)] Models Low Pressure Gas Pipe Liquid pipe High Pressure Gas Pipe I.D12.7(1/2) I.D9.52(3/8) 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.D6.35(1/4) I.D9.52(3/8) I.D15.88(5/8) I.D12.7(1/2) I.D15.88(5/8) I.D9.52(3/8) I.D15.88(5/8) I.D15.88(5/8) I.D6.35(1/4) ARBLB01621 I.D15.88(5/8) I.D12.7(1/2) I.D12.7(1/2) (2-29/32)
  • Page 49 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT 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) ID6.35(1/4) ID12.7(1/2) 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 (4-23/32) (5-29/32) 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) ID6.35(1/4)
  • Page 50: Leak Test And Vacuum Drying

    PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Leak Test and Vacuum drying Leak test Leak test should be made by pressurizing nitrogen gas to 3.8 MPa(551.1psi). If the pressure does not drop for 24 hours, the system passes the test. If the pressure drops, check where the nitro- gen leaks.
  • Page 51 PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Vacuum Vacuum drying should be made from the service port provided on the outdoor 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 52: Vacuum Mode

    PIPE CONNECTIONS BETWEEN INDOOR AND OUTDOOR UNIT Vacuum Mode This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition/replacement. Vacuum mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 53: Thermal Insulation Of Refrigerant Piping

    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 sepa- rately 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 - 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: Control Box And Connecting Position Of Wiring

    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 cable between main and sub outdoor unit through the terminal block. - Connect communication cables between outdoor unit and indoor units through the terminal block.
  • Page 57: Communication And Power Cables

    ELECTRICAL WIRING Communication and Power Cables Communication cable - Types : shielding cable - Cross section : 1.0~1.5mm (1.55 x 10 ~2.32 x 10 - Maximum allowable temperature: 140°F - Maximum allowable cable length: under 1000m(3,281ft) Remote control cable - Types : 3-core cable Central control cable Product type Cable type...
  • Page 58: Wiring Of Main Power Supply And Equipment Capacity

    ELECTRICAL WIRING Wiring of main power supply and equipment capacity - Use a separate power supply for the Outdoor Unit and Indoor Unit. - Bear in mind ambient conditions (ambient temperature,direct sunlight, rain water,etc.) when proceeding with the wiring and connections. - The cable size is the minimum value for metal conduit wiring.
  • Page 59 ELECTRICAL WIRING 575V Example Connection of Communication Cable 1 Outdoor Unit-3Ø, 575V Power supply 3 Phase 3 Wires 60Hz 575V [Outdoor Unit] (Main Switch) R S T Switch ELCB Power supply 1 Phase 60Hz 208/230V L(L1) N(L2) Power Line (3 Wires Cable) ELCB Power Line (2 Wires Cable)
  • Page 60 ELECTRICAL WIRING 2 Outdoor Units-3Ø, 575V When the power source is connected In series between the units. Power supply 3 Phase 3 Wires 60Hz 575V [Master] [Slave] (Main Switch) R S T Switch ELCB Power supply 1 Phase 60Hz 208/230V L(L1) N(L2) Power Line (3 Wires Cable)
  • 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 connec- tion 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 3 Outdoor Units-3Ø, 575V When the power source is connected In series between the units. Power supply 3 Phase 3 Wires 60Hz 575V [Master] [Slave1] [Slave2] (Main Switch) R S T Switch ELCB Power supply 1 Phase 60Hz 208/230V L(L1) N(L2) Power Line...
  • 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 connec- tion 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 Example) Connection of transmission wire [BUS type] - Connection of communication cable must be installed like below figure between indoor unit to outdoor unit. MMMMMMM [STAR type] - Abnormal operation can be caused by communication defect, when connection of communica- tion cable is installed like below figure(STAR type).
  • Page 65 ELECTRICAL WIRING Example) Connection of power and communication cable (UX2) Left Side Right Side Main power Main power terminal block terminal block Ground wire Ground wire Power/ Power/ Ground cable Ground cable Over Over 50mm(1.97”) 50mm(1.97”) Communication Communication cable cable Front Side 1 Front Side 2 Main power...
  • Page 66 ELECTRICAL WIRING Example) Connection of power and communication cable (UX3) Left Side Right Side Main power Main power terminal block terminal block Ground wire Ground wire Power/ Power/ Ground cable Ground cable Over 50mm Over 50mm (1.97”)gap (1.97”)gap Communication Communication cable cable Front Side 1...
  • Page 67: Checking The Setting Of Outdoor Units

    ELECTRICAL WIRING Checking the setting of outdoor units Checking according to dip switch setting - 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. Checking the initial display The number is sequentially appeared at the 7 segment in 5 seconds after applying the power.
  • Page 68: Hr Unit Pcb

    HR UNIT PCB HR UNIT PCB #4 valve housing #1 valve housing #1 cooling valve LED(green) 7-SEG SW05M (Switch for addressing HR unit) SW01M SW02M SW01M/SW03M/SW04M (Dip switch for setup of (Switch for manual valve SW03M SW04M the function of HR unit) addressing) Switch for setup of HR Unit 1 Main function of SW02M...
  • Page 69 HR UNIT PCB 3) Selection of the model of the HR unit (For 2 branches) (For 3 branches) (For 4 branches) PRHR021A PRHR031A PRHR041A Initial Setting 1 branches Connected 2 branches Connected 3 branches Connected 4 branches Connected * Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory. CAUTION •...
  • Page 70 HR UNIT PCB 4) Setting the Valve Group. DIP S/W setting Example Indoor Unit Indoor Unit Not control Indoor Unit Indoor Unit Indoor Unit No.1, 2 Valve Indoor Unit Large capacity indoor unit Control Indoor Unit No.2, 3 Valve Large capacity indoor unit Control Indoor Unit Large capacity indoor unit...
  • Page 71 HR UNIT PCB 2 SW05M (Rotary S/W for addressing HR unit) Must be set to '0' when installing only one HR unit. When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'. Ex) Installation of 3 HR units 3 SW01M/SW03M/SW04M (Dip S/W and tact S/W for manual valve addressing) 1) Normal setting (Non-Zoning setting) - Set the address of the valve of the HR unit to the central control address of the connected in-...
  • Page 72 HR UNIT PCB 2) Zoning setting - Set the address of the valve of the HR unit to the central control address of the connected in- door unit. - SW01M : selection of the valve to address SW03M : increase in the digit of 10 of valve address SW04M : increase in the last digit of valve address SW05M :Rotary S/W - Prerequisite for manual valve addressing : central control address of each indoor unit must be...
  • Page 73: Automatic Addressing

    HR UNIT PCB Automatic Addressing The address of indoor units would be set by Automatic Addressing - Wait for 3 minutes after supplying power. (Master and Slave outdoor units, indoor units) - Press RED button of the outdoor units for 5 seconds. (SW01C) - A “88”...
  • Page 74 HR UNIT PCB The Procedure of Automatic Addressing Power On Waiting 3 minutes Press RED Button for 5 sec. (SW01C) Automatic addressing start 7-segment LED = 88 Don’t press RED Button (SW01C) • Automatic addressing setting end Numbers of indoor unit connection set whose addressing is completed are indicated for 30seconds on Waiting about 2~7 minutes 7-segment LED after completing setting...
  • Page 75 HR UNIT PCB Flow chart of auto addressing for pipe detection Confirmation of indoor unit address setting Outdoor unit is operated for 5~60 minues. Turn No.1 of SW02M of HR unit PCB off. Is the pipe setting condition Confirm that the setting of No.2, 3 of satisfied during the operation of SW02M corresponds with the number of indoor unit?
  • Page 76 HR UNIT PCB Flow chart of manual addressing for pipe detection Execute in case of Auto pipe detection failure Wait for about 5 minutes. Turn No.1 of SW02M of HR unit PCB on. The number of the indoor units installed is displayed.
  • Page 77: Example Of Manual Valve Addressing (non-zoning Setting)

    HR UNIT PCB Example of manual valve addressing (Non-Zoning setting) (In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit) - Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differently at its wired remote control.
  • Page 78: Example Of Manual Valve Addressing (zoning Setting)

    HR UNIT PCB Example of manual valve addressing (Zoning setting) (In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit) Zoning control is connecting 2 or more indoor units at one pipe of HR unit. In case of Zoning control, in order to set controls with multiple indoor units connection uses the rotary switch.
  • Page 79: Method Of Checking The Pipe Detection Result At Hr Unit

    HR UNIT PCB Method of checking the pipe detection result at HR unit In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit Display and setup Setup and Contents - Operation: Turn dip S/W No.1 on.
  • Page 80: Setting Method Of Master Indoor Unit In Zoning

    HR UNIT PCB Setting method of Master indoor unit in zoning 1 Turn dip switch 5,6,10 on at system off. 2 Set the left Rotary switch for HR unit.(Rotary switch No. "0" HR unit No. "1") 3 Set the right Rotary switch for IDU unit.(Rotary switch No. "0" HR unit branch No. "1") 4 Display the Master IDU No.
  • Page 81 HR UNIT PCB Setting the function Select the mode/function/option/value using ‘▶’, ‘◀’ Button and confirm that using the ‘●’ but- ton after dip switch No.5 is turned on. DIP-SW01 7 - Segment SW04C ( : cancel) SW03C ( : forward) SW02C ( : backward) SW01C ( : confirm)
  • Page 82: Group Number Setting

    HR UNIT PCB Group Number setting Group Number setting for Indoor Units - Confirm the power of whole system(Indoor Unit, Outdoor Unit) is OFF, otherwise turn off. - The communication cables connected to CEN.A and CEN.B terminal should be connected to central control of Outdoor Unit with care for their polarity (A-A, B-B ).
  • Page 83: Test Run

    TEST RUN TEST RUN Cool & Heat selector mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn1”...
  • Page 84: Static Pressure Compensation Mode

    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. Static pressure compensation mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 85: Night Low Noise Function

    TEST RUN Night Low Noise Function 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. Night low noise function setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 86: Overall Defrost Mode

    TEST RUN Overall defrost mode mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn4” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 87: Setting The Odu Address

    TEST RUN Setting the ODU address mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn5” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 88: Snow Removal & Rapid Defrost

    TEST RUN Snow removal & rapid defrost mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn6” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 89: Target Pressure Adjusting

    TEST RUN Target pressure adjusting mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn8” Push the ‘●’ button Select the Option using ‘▶’, ‘◀’...
  • Page 90: Self-diagnosis Function

    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-seg- ment LED of outdoor unit control board as shown in the table. - If more than two troubles occur simultaneously, lower number of error code is first displayed.
  • Page 91 TEST RUN Display Title Cause of Error Master Outdoor Unit Inverter Com- Master Outdoor Unit Inverter Compressor Fault 2 9 * pressor Over Current or Drive Fault Master Outdoor Unit Inverter Com- Master Outdoor Unit Inverter Compressor1 3 2 * pressor1 High Discharge Temperature High Discharge Temperature Master Outdoor Unit Inverter Com-...
  • Page 92 TEST RUN Display Title Cause of Error Inverter PCB EEPROM Error of Master Access Error of Inverter PCB of Master Outdoor 6 0 * Outdoor Unit Unit Master Outdoor Unit Inverter Heatsink System is turned off by Master Outdoor Unit In- 6 2 * High Temperature verter Heatsink High Temperature...
  • Page 93 TEST RUN Display Title Cause of Error Communication Error Between Failing to receive Slave Unit signal at main PCB 1 0 4 * Master Outdoor Unit and Other of Master Outdoor Unit Outdoor Unit Master Outdoor Unit Fan PCB Failing to receive fan signal at main PCB of 1 0 5 * Communication Error Master unit.
  • Page 94: 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 regula- tions 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 95 CAUTION FOR REFRIGERANT LEAK - 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 refrigerant in refrigerant facility [kg(lbs)] In case the result of calculation exceeds = Refrigerant concentration the limiting concentration, perform the Capacity of smallest room where...
  • Page 96: Installation Guide At The Seaside

    INSTALLATION GUIDE AT THE SEASIDE INSTALLATION GUIDE AT THE SEASIDE In case, to install the outdoor unit on the sea- CAUTION side, set up a windbreak not to be exposed to the sea wind. • Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.
  • Page 97 1. Please call the installing contractor of your product, as warranty service will be pro- vided by them. 2. If you have service issues that have not been addressed by the contractor, please call 1-888-865-3026. CANADA Service call Number # : (888) LG Canada, (888) 542-2623...

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