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LG Multi V PRHR042A Installation Manual
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LG Multi V PRHR042A Installation Manual

LG Multi V PRHR042A Installation Manual

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INSTALLATION MANUAL
AIR
CONDITIONER
Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring standards
by authorized personnel only.
Please retain this installation manual for future reference after reading it thoroughly.
For Heat Pump / Heat Recovery system
Original instruction
MFL68980308
Rev.03_051320
Copyright © 2016 - 2020 LG Electronics Inc. All Rights Reserved.
www.lghvac.com
www.lg.com

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Summary of Contents for LG Multi V PRHR042A

  • Page 1 Please retain this installation manual for future reference after reading it thoroughly. For Heat Pump / Heat Recovery system Original instruction www.lghvac.com www.lg.com MFL68980308 Rev.03_051320 Copyright © 2016 - 2020 LG Electronics Inc. All Rights Reserved.
  • Page 2 Installation TIPS FOR SAVING ENERGY • Have all electric work done by a licensed electrician according to "Electric Facility Engineering Standard" and "Interior Wire Regulations" Here are some tips that will help you minimize the power consumption and the instructions given in this manual and always use a special when you use the air conditioner.
  • Page 3 CAUTION • Auto-addressing should be done in condition of connecting the power of all indoor and outdoour units. Auto-addressing should also be done in Installation case of changing the indoor unit PCB. • Always check for gas (refrigerant) leakage after installation or repair of •...
  • Page 4 TABLE OF CONTENTS Low Ambient Kit (Fn 9) High Efficiency Mode (Cooling Operation) (Fn 10) Auto Dust Removal Mode (Fn 11) Compressor Max. Frequency Limit (Fn 12) TIPS FOR SAVING ENERGY ODU Fan Max. RPM Limit (Fn 13) SLC (Smart Load Control) (Fn 14) IMPORTANT SAFETY INSTRUCTIONS Humidity Reference Control (Fn 16) Central Control Connection at Indoor Unit side (Fn 19)
  • Page 5 INSTALLATION PROCESS OUTDOOR UNITS INFORMATION CAUTION Indicate clearly who will be responsible for switch setting. Determination of division work Combination Ratio(50~130 %) Make connection clearly between outdoor, indoor, Preparation of contract drawings remote controller and option. Outdoor Number Connection Capacity Single outdoor units Take account of gradient Sleeve and insert work...
  • Page 6 • Avoid unit installation in a place where acidic solution and spray (sulfur) are often used. 6(1/4) more (Serviceing space) • Do not use unit under any special environment where oil, steam and 809(31-27/32) sulfuric gas exist. • It is recommended to fence round the outdoor unit in order to 300(11-13/16) more 300(11-13/16) prevent any person or animal from accessing the outdoor unit.
  • Page 7 INSTALLATION SPACE Seasonal wind and cautions in winter • Sufficient measures are required in a snow areas or severe cold areas in winter so that product can be operated well. Individual Installation • Get ready for seasonal wind or snow in winter even in other areas. •...
  • Page 8 Ⓐ The corner part must be fixed firmly. Otherwise, the support for the INSTALLATION installation may be bent. Ⓑ Get and use M10 Anchor bolt. • Install at places where it can endure the weight and vibration/noise Ⓒ Put Cushion Pad between the outdoor unit and ground support for of the outdoor unit.
  • Page 9 Burrs removal Opening shutoff valve - Completely remove all burrs from the cut cross section of pipe/tube. - Put the end of the copper tube/pipe to downward direction as you Remove the cap and turn the valve counter clockwise with the remove burrs in order to avoid to let burrs drop in the tubing.
  • Page 10 Plumbing materials and storage methods Nitrogen substitution method Welding, as when heating without nitrogen substitution a large Pipe must be able to obtain the specified thickness and should be amount of the oxide film is formed on the internal piping. used with low impurities.
  • Page 11 REFRIGERANT PIPING INSTALLATION 2, 3 Outdoor Units Unit : mm(inch) Outdoor Units Model Pipe For Heat Recovery System Installation Low Pressure Gas Pipe Precautions on Pipe connection / Valve operation I.D 22.2 O.D 28.58 I.D 34.9 (7/8) (1-1/8) (1-3/8) 416(16-3/8) Pipe connection is done by connecting from the end of the pipe to the 408(16-1/16) I.D 28.58(1-1/8)
  • Page 12 Installation procedure for HR unit Type of HR Unit Using an insert-hole-in- anchor, hang the hanging bolt. Select an HR unit according to the number of the indoor units to be installed. HR units are classified into 3 types by the number of Install a hexagon nut and a flat washer (locally-procured)to the connectable indoor units.
  • Page 13 Installation of Zoning Control 3 Series Some indoor unit can be connected to one port of HR unit. HR Unit HR Unit 4 3 2 4 3 2 HR unit HR unit (48k) (72k) (38k) (92k) sealing Zoning control group 1 Zoning control group 2 NOTE (Max.
  • Page 14 Caution Always insulate the piping properly. Insufficient insulation will result in a decline in heating/cooling performance, drip of Use the following materials for refrigerant piping. condensate and other such problems. - Material: Seamless phosphorous deoxidized copper pipe When connecting the refrigerant piping, make sure the service - Wall thickness : Comply with the relevant local and national valves of the Outdoor Unit is completely closed (the factory regulations for the designed pressure 3.8 MPa...
  • Page 15 CAUTION For more information, refer accessory installation manual. Please block the pipe knock outs of the front and side panels after Y branch installing the pipes. Within +/- 10 (Animals or foreign objects may be brought in to damage wires.) Viewed from point A To outdoor unit in direction of arrow...
  • Page 16 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 0.2 kgf/cm (2.8 psi) Nitrogen flow in the pipe when welding.
  • Page 17 Refrigerant piping system Remove leakage prevention cap • Remove the leakage prevention cap attached to the outdoor unit 3 Outdoor Units service valve before pipe work. • Proceed the leakage prevention cap removal as follows: Example : 12 Indoor Units connected - Verify whether the liquid/gas pipes are locked.
  • Page 18 Refrigerant pipe diameter from branch to branch (B,C) Refrigerant pipe diameter from outdoor unit to first branch. (A) Gas pipe [mm(inch)] Downward indoor Liquid pipe unit total capacity Pipe diameter when pipe length is ≥ [mm(inch)] Low pressure High pressure [kW(Btu/h)] Standard Pipe Diameter 90 m (295 ft) or when height differential...
  • Page 19 Pattern 3 Pattern 8 48 k 48 k 48 k 48 k 48 k 48 k 12 k 12 k 12 k 12 k 24 k 24 k • The maximum total capacity of indoor units is 56.4 kW(192 kBtu/h). •...
  • Page 20 CAUTION Refrigerant piping system 1 Outdoor Units • Do not give damage to the pipe/base during the Knock Out work. Y branch method • Proceed to pipe work after removing burr after Knock Out work. Indoor • Perform sleeve work to prevent damage to the wire when Unit Ⓐ...
  • Page 21 h See Table 2 Series Outdoor Units (2 Units ~ 3 Units) A : Refrigerant pipe diameter from outdoor unit to first branch Y branch method E : Refrigerant pipe diameter for outdoor unit capacity Slave2 (Slave 1+ Slave 2+ Slave 3) Slave1 Ⓐ...
  • Page 22 (Table 2) Refrigerant pipe diameter from outdoor unit to first branch. (A) Outdoor unit Connection Pipe diameter when height Pipe diameter when pipe Pipe diameter when pipe WARNING length (ODU ↔ IDU) differential (ODU ↔ IDU) Length is < 90 m (295 ft) is ≥...
  • Page 23 - If pipe is higher than outside unit, oil trap must be installed after each Pipe Connection Method/Precautions for Y branch. Series connections between Outdoor units - Oil trap should be located at same level of Y branch. (Heat Pump : High Pressure Vapor / Heat Recovery : High Pressure Vapor &...
  • Page 24 - When connecting the pipes between the outdoor units, the Attach the additional refrigerant table of IDU. 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 25 Refrigerant charging Branch pipe Fitting For Heat Recovery System Installation Y branch Ⓐ Manifold Gauge Ⓑ Low pressure side Handle Ⓐ To Outdoor Unit Ⓒ High pressure side Handle Ⓑ To Branch Piping or Indoor Unit • Ensure that the branch pipes are attached horizontally or vertically. (see the diagram below.) -3°...
  • Page 26 • Header should be insulated with the insulator in each kit. Models Pipe Low-Pressure Vapor Pipe I.D 15.88(5/8) I.D 19.05(3/4) I.D 22.2(7/8) I.D 19.05(3/4) Insulate the header using the insulation material attached to the branch pipe kit I.D 12.7(1/2) as shown in the figure. I.D 25.4(1) O.D 19.05(3/4) I.D 28.58(1-1/8)
  • Page 27 Models Pipe Models Pipe Low-Pressure Vapor Pipe Gas pipe I.D 34.9(1-3/8) I.D 22.2(7/8) I.D 19.05(3/4) I.D 38.1(1-1/2) I.D 34.9(1-3/8) I.D 41.3(1-5/8) I.D 28.58(1-1/8) I.D 15.88(5/8) I.D 25.4(1) I.D 19.05(3/4) I.D 12.7(1/2) I.D 12.7 I.D 19.05(3/4) I.D 28.58(1-1/8) I.D 38.1(1-1/2) (1/2) I.D 15.88(5/8) (3-9/32) 390(15-11/32)
  • Page 28 Header Models Pipe Gas pipe [Unit:mm(inch)] 760(29-29/32) Models Pipe ID 15.88(5/8) ID 12.7(1/2) Gas pipe ID 19.05(3/4) ID 15.88(5/8) 360(14-3/16) 120(4-23/32) ID 12.7(1/2) 10 branch ID 28.58(1-1/8) ID 25.4(1) ID 22.2(7/8) ID 12.7(1/2) ID 15.88(5/8) ARBL1010 ID 15.88(5/8) Liquid pipe 720(28-11/32) 4 branch ID 19.05(3/4)
  • Page 29 Distribution Method Vacuum Mode Horizontal Distribution This function is used for creating vacuum in the system after compressor replacement, ODU parts replacement or IDU addition / Slave replacement. Master Vacuum mode setting method ARUM***B(D)TE5 3rd main pipe distribution Slave Master DIP-SW01 7-Segment SW04C (X : cancel)
  • Page 30 CAUTION Leak Test and Vacuum drying Leak test To prevent the nitrogen from entering the refrigeration system in the liquid state, the top of the cylinder must be at higher position Leak test should be made by pressurizing nitrogen gas to 3.8 MPa than the bottom when you pressurize the system.
  • Page 31 NOTE Good example Always add an appropriate amount of refrigerant. (For the refrigerant Power lines Communication lines additional charge) Too much or too little refrigerant will cause trouble. Ⓐ Liquid pipe To use the Vacuum Mode (If the Vacuum mode is set, all valves of Indoor Ⓑ...
  • Page 32 ELECTRICAL WIRING Multi-Core Cable Master Slave Caution Indoor Indoor - Follow ordinance of your governmental organization for technical Unit Unit standard related to electrical equipment, wiring regulations and guidance of each electric power company. Remote Remote WARNING control control Master Slave Be sure to have authorized electrical engineers do the electric Indoor Indoor...
  • Page 33 Control box and connecting position of wiring Communication and Power Cables - Remove all of the screws at front panel and remove the panel by Communication cable pulling it forward. - Types : shielded wires or unshielded wires - Connect communication cable between main and slave outdoor unit - Cross section : 1.0 ~ 1.5 mm (1.55 ×...
  • Page 34 WARNING Wiring of main power supply and equipment capacity • Indoor unit ground lines are required for preventing electrical shock accident during current leakage, Communication disorder by noise - Use a separate power supply for the Outdoor Unit and Indoor Unit. effect and motor current leakage (without connection to pipe).
  • Page 35 NOTE When the power source is supplied to Each outdoor unit individually. - Field wiring diagram is to be used as a guidelineonly. Wiring Power supply 3 Phase 3 Wires should comply with applicable local and national codes 60 Hz 208/230 V [Master] [Slave1] [Slave2]...
  • Page 36 460 V / 575 V When the power source is supplied to Each outdoor unit individually. Example Connection of Communication Cable Power supply 3 Phase 3 Wires 1 Outdoor Unit-3 Ø, 460 V / 575 V 60 Hz 460 V / 575 V [Master] [Slave] (Main Switch)
  • Page 37 3 Outdoor Units-3 Ø, 460 V / 575 V Between Indoor and Master Outdoor unit When the power source is connected In series between the units. Master SODU. B SODU. A IDU. B IDU. A CEN. B CEN. A DRY1 DRY2 12 V Outdoor Unit...
  • Page 38 Example) Connection of power and communication cable (UXA) Front Side Bottom Side Main power terminal block Ground wire Main power When connecting terminal block Communication wires / Ground wire from When connecting Ground wire front guide panel Main power lines / Ground wire from left side Gap : Over 50 mm(1.97’’)
  • Page 39 ARUM***CTE5 • Initial display order Order HP(Ton) Mean DIP switch ① 8(6)~24(20) Master unit capacity ② 26(22)~44(36) Slave 1 unit capacity 7 Segment ③ 46(38)~52(42) Slave 2 unit capacity ④ 8(6)~52(42) Total capacity ⑤ Heat Recovery (Factory Setting) 460 V model ⑥...
  • Page 40 Setting For Heat Recovery Unit (Refer Only Heat Switch for setup of HR Unit Recovery Installation) 2 Series Main function of SW02M [Heat Recovery (HR) Unit Board] 2 Series Selection Method for addressing valves of an #4 valve housing No.1 HR unit (Auto/Manual) No.2 Model of HR unit #1 valve housing...
  • Page 41 Main function of SW02E 3 Series ON S/W Selection No.1 Method for pipe detection of an HR Unit (Auto/Manual) No.2 No.3 No. of connected branches PRHR023A PRHR033A PRHR043A No.4 No.5 Master/Slave (Main PCB) Setting 1 branch Connected No.6 EEPROM factory initialization (4,5,6) Use only in factory production 2 branch No.7...
  • Page 42 SW05M (Rotary S/W for addressing HR unit) Setting the Valve Group. Must be set to '0' when installing only one HR unit. 2 Series When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'. DIP S/W setting Example Ex) Installation of 3 HR units...
  • Page 43 SW01C (Rotary S/W for addressing HR unit) 3 Series Main function of SW01D Must be set to '0' when installing only one HR unit. - Selection of the Valve Group Control When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'.
  • Page 44 Automatic Addressing Normal setting (Non-Zoning setting) The address of indoor units would be set by Automatic ex) Manual pipe detection of Valve #1, 6. Addressing Master Master Master - Wait for 3 minutes after supplying power. (Master and Slave outdoor units, indoor units) - Press RED button of the outdoor units for 5 seconds.
  • Page 45 WARNING The Procedure of Automatic Addressing • Execute auto addressing and auto pipe detection again whenever Power On the indoor PCB and HR unit PCB is replaced. - Operation error occurs unless power is supplied to the indoor Waiting 3 minutes and HR units.
  • Page 46 Flow chart of auto pipe detection Process Confirm indoor unit’s address setting Is the number of indoor units connected and displayed one equal? Turn No.1 of DIP s/w SW02M of HR unit PCB off. Pipe detection error occurs for 30 seconds.
  • Page 47 Flow chart of manual addressing for pipe Example of manual valve addressing (Non-Zoning detection setting) (In case that an indoor unit of central control address "11" is connected Execute in case of Auto pipe detection to a valve #1 of an HR unit) failure - Prerequisite for manual valve addressing: central control address of each indoor unit must be preset differently at its wired remote...
  • Page 48 Example of manual valve addressing (Zoning Method of checking the pipe detection result setting) at HR unit (In case that an indoor unit of central control address "11" is connected In case that an indoor unit of central control address "11" is connected to a valve #1 of an HR unit) to a valve #1 of an HR unit Zoning control is connecting 2 or more indoor units at one pipe of HR...
  • Page 49 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 50 CAUTION High Static Pressure Compensation mode (Fn 2) This function secures the air flow rate of ODU, in case static pressure • To perform the otional funtion should be sure that All the IDU is off has been applied like using duct at fan discharge of ODU. mode, unless the function will not be performed.
  • Page 51 Setting the ODU address (Fn 5) Time Settings Step Judgment Time(Hr) Operation Time(Hr) Mode setting method Master unit PCB DIP switch on : No.5 10.5 Select the mode using ‘▶’, ‘◀’ Button : 10.5 “Func” Push the ‘●’ button Select the Function using ‘▶’, ‘◀’ Button : “Fn5”...
  • Page 52 Target pressure adjusting (Fn 8) High Efficiency Mode (Cooling Operation) (Fn 10) Mode setting method Mode setting method Master unit PCB DIP switch on : No.5 - Target low pressure will change according to ODU temperature during the cooling operation. Select the mode using ‘▶’, ‘◀’...
  • Page 53 Compressor Max. Frequency Limit (Fn 12) SLC (Smart Load Control) (Fn 14) Mode setting method Function for set the variable target pressure which for the high efficiency and comport operation depend on ODU load. Master unit PCB DIP switch on : No.5 Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 54 Central Control Connection at Indoor Unit side (Fn 19) Overall Defrost Operating in Low temperature (Heating) (Fn 22) Mode setting method Master unit PCB DIP switch on : No.5 Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’...
  • Page 55 Comfort Cooling operation (Id 10) It is function to reduce the ODU energy consumption by the continuou s operation without thermo off. Mode setting method Master unit PCB DIP switch on : No.5 Select the mode using ‘▶’, ‘◀’ Button : “Idu”...
  • Page 56 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 57 Display Title Cause of Error Master Outdoor Unit input voltage is over 537 V or below 247 V (ARUM***LTE5) Master Outdoor Unit input voltage is over 310 V or below 143 V Master Outdoor Unit Input Voltage High/ Low (ARUM***BTE5) Voltage Master Outdoor Unit input voltage is over 598 V or below 320 V (ARUM***DTE5)
  • Page 58 Display Title Cause of Error Outdoor Unit Fan DC Link Low Voltage Error Outdoor Unit Fan DC Link Input Voltage is under 380 V Outdoor Unit Liquid pipe Temperature Sensor Error Liquid pipe temperature sensor of Outdoor Unit is open or short Outdoor Unit Subcooling Inlet Temperature Sensor Outdoor Unit Subcooling Inlet Temperature Sensor Error Error...
  • Page 59 INSTALLATION GUIDE AT THE Calculate minimum room capacity Calculate room capacity by regarding a portion as one room or the SEASIDE smaller room. - Without partition - With partition and with opening which serve as passage of air to CAUTION adjoining room Outdoor unit Outdoor unit...
  • Page 60 Model Designation Product information • Product Name : Air conditioner • Model Name : Product Sales Name Model Factory Name ARUx***yTE5 series = N (Heat Pump), V (Cooling Only), M (Heat Recovery / Heat Pump) = B (208/230 V) D (460 V) C (575 V) *** = Numeric;...
  • Page 61 Please call the installing contractor of your product, as warranty service will be provided by them. Service call Number # : (888) LG Canada, (888) 542-2623 CANADA Numéro pour les appels de service : LG Canada, 1-888-542-2623...

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