DUCTED INDOOR UNITS INSTALLATION MANUAL High-Static Ducted Indoor Units Built-In Ducted Indoor Units ARNU073BGA4 ARNU283BRA4 ARNU363B8A4 ARNU073BHA4 ARNU093BGA4 ARNU363BRA4 ARNU423B8A4 ARNU093BHA4 ARNU123BGA4 ARNU423BRA4 ARNU483B8A4 ARNU123BHA4 ARNU073B3G4 ARNU153B3G4 ARNU153BGA4 ARNU483BRA4 ARNU763B8A4 ARNU153BHA4 ARNU093B3G4 ARNU183B4G4 ARNU183BGA4 ARNU543BRA4 ARNU963B8A4 ARNU183BHA4 ARNU123B3G4 ARNU243B4G4 ARNU243BGA4 ARNU243BHA4 ARNU283BGA4 ARNU363BGA4 ARNU423BGA4 Low-Stati
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TABLE OF CONTENTS Safety Instructions..........................................................................4 Introduction.....................................................................................9 Unit Nomenclature........................................................................ 11 R410A Refrigerant........................................................................12 General Data................................................................................13 Overview..........
SAFETY INSTRUCTIONS The instructions below must be followed to prevent product malfunction, property damage, injury or death to the user or other people. Incorrect operation due to ignoring any instructions will cause harm or damage. The level of seriousness is classified by the symbols below. TABLE OF SYMBOLS DANGER This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
SAFETY INSTRUCTIONS INSTALLATION – CONTINUED injuries or death from oxygen depletion. CAUTION Be very careful when transporting the product. • Do not attempt to carry the product without assistance. • Some products use polypropylene bands for packaging. Do not use polypropylene bands to lift the unit. • Suspend the unit from the base at specified positions. • Support the unit at a minimum of four points to avoid slippage from rigging apparatus.
SAFETY INSTRUCTIONS WIRING DANGER High voltage electricity is required to operate this system. Adhere to the National Electrical Codes and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death. Always ground the unit following local, state, and National Electrical Codes.
OPERATION DANGER Do not provide power to or operate the unit if it is flooded or submerged. There is risk of fire, electric shock, physical injury or death. Use a dedicated power source for this product. There is risk of fire, electric shock, physical injury or death. Do not operate the disconnect switch with wet hands. There is risk of fire, electric shock, physical injury or death. WARNING Do not allow water, dirt, or animals to enter the unit.
Multi V Ducted Indoor Units 8 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
INTRODUCTION Ducted Indoor Units This manual describes how to install LG ducted indoor units (IDU) for Multi V Variable Refrigerant Flow (VRF) heat pump and heat recovery systems. Table 1 lists the available models. Refer to LG’s Multi V Indoor Unit Engineering Manual for complete detailed engineering data and selection procedures. Figure 1: High-Static Ducted, BG/BR/B8/BH Chassis Safety Safety of personnel is the primary concern during all procedures.
INTRODUCTION Table 1: Multi V Ducted Indoor Units Unit Model Numbers High-Static Ducted BG/BR/B8 ARNU073BGA4 ARNU283BRA4 ARNU363B8A4 ARNU073BHA4 ARNU093BGA4 ARNU363BRA4 ARNU423B8A4 ARNU093BHA4 ARNU123BGA4 ARNU423BRA4 ARNU483B8A4 ARNU123BHA4 ARNU153BGA4 ARNU483BRA4 ARNU763B8A4 ARNU153BHA4 ARNU183BGA4 ARNU543BRA4 ARNU963B8A4 ARNU183BHA4 ARNU243BGA4 ARNU243BHA4 ARNU283BGA4 Multi V Ducted Indoor Units ARNU363BGA4 ARNU423BGA4 Built-In Ducted B3/B4 ARNU073B3G4 ARNU093B3G4 ARNU123B3G4
UNIT NOMENCLATURE Cassette Indoor Units Nomenclature ARN U 07 3 BG A 4 Family ARN = Multi V Indoor Unit (Refrigerant R410A) Type U = Inverter Heat Pump/Heat Recovery 42 = 42,000 48 = 48,000 54 = 54,000 76 = 76,000 96 = 96,000 Installation Manual Nominal Capacity (Nominal cooling capacity in Btu/h) 07 = 7,500 18 = 19,100 09 = 9,600 24 = 24,200 12 = 12,300 28 = 28,000 15 = 15,400 36 = 36,200 Electrical Ratings 3 = 208–230V/60Hz/1Phase Chassis/Model Type BG = High-Static Ducted BR = High-Static Duc
R410A REFRIGERANT R410A refrigerant has a higher operating pressure in comparison to R22 refrigerant and, therefore, all piping system materials installed must have a higher resisting pressure than the materials traditionally used in R22 systems. R410A refrigerant is an azeotrope of R32 and R125, mixed at 50:50, so the ozone depletion potential (ODP) is 0. WARNING • Do not place the refrigerant cylinder in direct sunlight. Refrigerant cylinder may explode causing severe injury or death.
GENERAL DATA Specifications − High-Static BH Chassis Table 2: High-Static Ducted BH Chassis IDU Specifications Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU073BHA4 ARNU093BHA4 ARNU123BHA4 ARNU153BHA4 ARNU183BHA4 ARNU243BHA4 7,500 150 9,600 150 12,300 150 15,400 150 19,100 150 24,200 150 Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 27,300 Power Input1 (W) 150 150 150 150 150 150 Cooling Max.
GENERAL DATA Specifications − High-Static BG Chassis Table 3: High-Static BG Chassis IDU Specifications Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU073BGA4 ARNU093BGA4 ARNU123BGA4 ARNU153BGA4 ARNU183BGA4 7,500 450 9,600 450 12,300 450 15,400 450 19,100 450 Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 Power Input (W) 450 450 450 450 450 Cooling Max. (°F WB) 76 76 76 76 76 Heating Min.
GENERAL DATA Specifications − High-Static BG Chassis Table 2: High-Static BG Chassis IDU Specifications – continued Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU243BGA4 ARNU283BGA4 ARNU363BGA4 ARNU423BGA4 24,200 450 28,000 450 36,200 450 42,000 450 Capacity (Btu/h) 27,300 31,500 40,600 43,800 Power Input1 (W) 450 450 450 450 Cooling Max. (°F WB) 76 76 76 76 Heating Min.
GENERAL DATA Specifications − High-Static BR/B8 Chassis Table 4: High-Static BR Chassis IDU Specifications Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU283BRA4 ARNU363BRA4 ARNU5423BRA4 ARNU483BRA4 ARNU543BRA4 28,000 450 36,200 450 42,000 450 48,100 450 54,000 450 Capacity (Btu/h) 31,500 40,600 43,800 51,200 61,400 Power Input1 (W) 450 450 450 450 450 Cooling Max. (°F WB) 76 76 76 76 76 Heating Min.
Table 5: High-Static B8 Chassis IDU Specifications Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU363B8A4 ARNU423B8A4 ARNU483B8A4 ARNU763B8A4 ARNU963B8A4 36,200 800 42,000 800 48,100 800 76,400 800 95,900 800 Capacity (Btu/h) 40,600 43,800 51,200 86,000 107,500 Power Input1 (W) 800 800 800 800 800 Cooling Max. (°F WB) 76 76 76 76 76 Heating Min.
GENERAL DATA Specifications − Low-Static B3/B4 Chassis Table 6: Low-Static Built-In B3/B4 Chassis IDU Specifications Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4 ARNU183B4G4 ARNU243B4G4 7,500 85 9,600 85 12,300 85 15,400 85 19,100 85 24,200 115 Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 27,300 Power Input (W) 85 85 85 85 85 115 Cooling Max.
GENERAL DATA Specifications − Low-Static Ducted L1/L2/L3 Chassis Table 7: Low-Static Ducted L1/L2/L3 Chassis IDU Specifications Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU073L1G4 ARNU093L1G4 ARNU123L2G4 ARNU153L2G4 ARNU183L2G4 ARNU243L3G4 7,500 40 9,600 40 12,300 85 15,400 85 19,100 85 24,000 115 Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 27,300 Power Input1 (W) 40 40 85 85 85 115 Cooling Max.
GENERAL DATA Specifications − Vertical Air Handler NJ Chassis Table 8: Vertical Air Handler NJ Chassis IDU Specifications Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU123NJA4 ARNU183NJA4 ARNU243NJA4 ARNU303NJA4 ARNU363NJA4 12,000 80 18,000 80 24,000 120 30,000 178 36,000 228 Capacity (Btu/h) 13,500 20,000 27,000 34,000 40,000 Power Input1 (W) 80 80 120 178 228 Cooling Max. (°F WB) 76 76 76 76 76 Heating Min.
GENERAL DATA Specifications − Vertical Air Handler NK Chassis Table 9: Vertical Air Handler NK Chassis IDU Specifications Model No. Cooling Mode Performance Capacity (Btu/h) Power Input1 (W) Heating Mode Performance ARNU423NKA4 ARNU483NKA4 ARNU543NKA4 42,000 260 48,000 330 54,000 366 Capacity (Btu/h) 46,000 54,000 60,000 Power Input1 (W) 260 330 366 Cooling Max. (°F WB) 76 76 76 Heating Min.
GENERAL DATA Electrical − High-Static BH/BG/BR/B8 Chassis Table 10: High-Static BH/BG/BR/B8 Chassis Indoor Unit Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) Power Supply Hz Volts Power Input (W) Phase Cooling Heating BH Units ARNU073BHA4 1.32 1.06 150 150 ARNU093BHA4 1.32 1.06 150 150 150 150 ARNU123BHA4 ARNU153BHA4 187-253 1.32 1.32 15 1.06 1.06 60 208-230 1 150 150 ARNU183BHA4 1.32 1.06 150 150 ARNU243BHA4 1.32 1.06 150 150 ARNU073BGA4 3.3 2.
GENERAL DATA Electrical − Low-Static Built-In B3/B4 Chassis Table 11: Low-Static Built-In B3/B4 Chassis Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) Power Supply Hz Volts Power Input (W) Phase Cooling Heating 85 85 85 85 85 85 85 85 115 115 115 115 B3 Units ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 1.0 187-253 ARNU153B3G4 1.0 1.0 0.76 15 1.0 0.76 0.76 60 208-230 1 0.76 B4 Units ARNU183B4G4 ARNU243B4G4 187-253 MCA : Minimum Circuit Ampacity.
GENERAL DATA Electrical − Low-Static Ducted L1/L2/L3 Chassis Table 12: Low-Static Ducted L1/L2/L3 Chassis Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) Power Supply Power Input (W) Hz Volts Phase 60 208-230 1 60 208-230 1 Cooling Heating 40 40 40 40 85 85 85 85 85 85 115 115 L1 Units ARNU073L1G4 ARNU093L1G4 208-230 0.5 0.5 15 0.4 0.4 L2 Units ARNU123L2G4 ARNU153L2G4 1.0 208-230 ARNU183L2G4 1.0 0.76 15 1.0 0.76 0.
GENERAL DATA Dimensions – High-Static Ducted BH Chassis Installation Manual Center of Gravity Note - All dimensions have a tolerance of ± 0.25 in. = Center of gravity Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA Multi V Ducted Indoor Units Dimensions – High-Static Ducted BG Chassis 26 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA Dimensions – High-Static Ducted BR Chassis Installation Manual Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA Multi V Ducted Indoor Units Dimensions – High-Static Ducted B8 Chassis 28 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
GENERAL DATA Dimensions – Built-In Low-Static Ducted B3/B4 Chassis With Suction Grill With Suction Grill & Suction Canvas With Suction Grill & Suction Canvas 7-1/2 10-7/8 1 8-1/2 24-5/16 15-1/4 15-1/8 Supply Air Liquid Vapor Drain B2 Return Air 9-13/16 C2 With Suction Grill Power Connection 7-7/16 A1 A2 2-3/8 Installation Manual 22-5/8 2-1/2 C3 B3 A3 Accessory PBSGB30 PBSGB40 Model ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4 7-1/2 19-11/16 (Max) With Suction Grill With Suctio
GENERAL DATA Dimensions – Low-Static Ducted L1/L2/L3 Chassis 13/16 1-3/8 Top 5-5/16 Multi V Ducted Indoor Units Air Outlet D 7-1/2 3-15/16 Vapor Pipe Connection Liquid Pipe Connection 8-11/16 27-9/16 Drain Pipe Connection Top 24-3/4 11-1/2 2-5/8 4-1/16 3-1/16 Power Supply Connection C Air Inlet L1 : 2-15/16 L2 : 3-1/16 L3 : 3-3/16 Top 6-1/16 7-1/2 13/16 L1 : 14-7/16 L2 : 22-1/16 L3 : 29-3/4 B A Center of Gravity Unit: inches Note: All measurements have a tolerance of ±1/4 in.
GENERAL DATA Dimensions – Vertical Air Handler NJ Chassis Supply Air opening 48-11/16 21-1/4 1-5/8 18 SIDE VIEW 7/8” Wiring knockouts Installation Manual 1-15/16 17 7/8” Wiring knockouts 2-1/8 18 2-1/16 1-9/16 1-9/16 12-1/8 1-15/16 Liquid pipe 48-11/16 TOP VIEW 49-5/16 21-1/4 1-11/16” Wiring knockouts 2-9/16 Vapor pipe Drain connection for upflow application 1-1/2 4-11/16 14-5/16 Return Air opening Unit: inches Note: All measurements have a tolerance of ±1/4 in.
GENERAL DATA Dimensions – Vertical Air Handler NK Chassis Supply Air opening 55-3/16 7/8” Wiring knockouts SIDE VIEW 1-15/16 7/8” Wiring knockouts 2-3/16 24 25 2-1/16 1-9/16 12-1/8 55-3/16 55-13/16 Multi V Ducted Indoor Units 1-9/16 1-5/8 25 21-1/4 Liquid pipe 1-11/16” Wiring knockouts 21-1/4 2-9/16 Vapor pipe 32 16-15/16 20 FRONT VIEW Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc.
GENERAL DATA Refrigerant Piping Diagrams Figure 5: High-Static Ducted BG/BR/BH, Low-Static Ducted L1/L2L3/B3/B4, and Vertical Air Handler NJ/NK Refrigerant Piping Diagram lndoor Unit Heat Exchanger EEV Th3 Filter Th2 Sirocco Fan Flare Nut Filter Th1 Flare Nut Refrigerant Pipes to Outdoor Unit Liquid Line Installation Manual Vapor Line Cooling Heating Th1 = Thermistor, Return Air Th2 = Thermistor, Pipe In Th3 = Thermistor, Pipe Out EEV = Electronic Expansion Valve Figure 6: High-Static Ducted
GENERAL INSTALLATION GUIDELINES Location Selection DANGER To avoid the possibility of fire, do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. Failure to do so will cause serious bodily injury or death. Before beginning installation, read the safety summary at the beginning of this manual.
INSTALLATION Install Ducted IDU Chassis 3. 4. 5. 6. 7. 8. Remove the protective cardboard/Styrofoam® top sheet and place to the side. The walls and top panels are not attached to the bottom of the box. Lift the carton by the flaps and remove the box walls and top. Remove the moisture barrier plastic bonnet. Check the unit nameplate data and model number. Verify the unit voltage, and capacities are correct before proceeding.
INSTALLATION Indoor Unit Dimensions 2. Use only LG-provided cable to connect the zone controller. Pull LG communications cable between the zone controller handy box and the indoor unit. A thirty-three (33) foot length of cable will be found with the wall-mounted zone controller. 3. Store a minimal amount of cable in the handy box. Any additional Figure 10: Low-Static Ducted Indoor Unit Dimensions. cable should be coiled and stored near the indoor unit control M4 panel. 4.
INSTALLATION Duct Connection Dimensions Figure 12: High-Static Ducted (BH, BG, BR, B8) Indoor Unit Duct Connection Dimensions. Figure 13: Low-Static Ducted (L1/L2/L3) Indoor Unit Duct Connection Dimensions. Supply Supply L1 L1 L2 L3 L2 L3 Return L5 L6 Return L7 L5 L6 Figure 14: Low-Static Built-In Ducted (B3, B4) Indoor Unit Duct Connection Dimensions. L7 L3 Installation Manual L2 L1 L7 L6 Chassis Code L5 Table 15: Duct Connection Dimensions (in.).
GENERAL INSTALLATION GUIDELINES Maintenance Clearances Figure 15: High-Static Ducted (BG/BR/B8/BH) Indoor Unit Maintenance Clearances. C2 Figure 16: Low-Static Ducted (L1/L2/L3) Indoor Unit Maintenance Clearances. C1 C2 C1 C3 C3 A3 A3 A2 A1 A1 A2 Multi V Ducted Indoor Units Figure 17: Low-Static Built-In Ducted (B3, B4) Indoor Unit Maintenance Clearances. C1 C2 Note: C3 When space is available, best practice would be to leave two (2) to three (3) inches on the end opposite the control panel.
INSTALLATION Piping Connections Figure 18: High-Static Ducted (BH/BG/BR/B8) Indoor Unit Piping Connection Dimensions. Figure 19: Low-Static Convertible Ducted (L1/L2/L3) Indoor Unit Piping Connection Dimensions. L11 L13 Figure 20: Low-Static Ducted Built-In (B3/B4) Indoor Unit Piping Connection Dimensions.
REFRIGERANT PIPING Piping Preparation WARNING Do not braze in an enclosed location. Do not allow the refrigerant to leak during brazing. Always test for gas leaks before and after brazing. • If refrigerant combusts, it generates a toxic gas. Note: • Do not use kinked pipe. Multi V Ducted Indoor Units Braze the pipe to the service valve pipe stub of the outdoor unit. After brazing, check for refrigerant gas leaks.
REFRIGERANT PIPING Tightening Flare Nuts 1. When connecting the flare nuts, coat the flare (inside and outside) with polyvinyl ether (PVE) refrigeration oil only. Note: • Do not use polyolyester (POE) or any other type of mineral oil as a lubricant. These lubricants are not compatible with PVE oil used in this system and create oil sludge leading to equipment damage and system malfunction.. 2. Initially hand tighten the flare nuts using three (3) or four (4) turns. 3.
REFRIGERANT PIPING Refrigerant Safety WARNING Verify the maximum refrigerant concentration level in the space where the indoor unit will be mounted meets the concentration limit for the application. There is risk of asphyxiation from oxygen depletion. ASHRAE Standards 15-2010 and 34-2010 offer guidelines that address refrigerant safety and the maximum allowable concentration of refrigerant in an occupied space.
REFRIGERANT PIPING A properly installed pipe system will have sufficient support so that pipes will not sag during the life of the system. As necessary, place supports closer for segments where potential sagging could occur. Maximum spacing of pipe supports must meet local codes. Figure 22: Pipe Support at Indoor Unit. Figure 23: Typical Pipe Support Location—Change in Pipe Direction. B Max.
CONDENSATE PIPING All ducted indoor units except the vertical air handler have a factorymounted condensate pump that runs continuously while the unit is in cooling mode. The pump has an internal high-level float switch that stops the unit if the water level in the pan rises too high. All ducted indoor units have a flexible drain hose kit and one or two clamps. The hose can be used to connect the condensate pipe to the condensate pump connection.
CONDENSATE PIPING Vertical/Horizontal Air Handler Unit Drain Information Note: Figure 28: Vertical / Horizontal Air Handler Unit Drain Piping System. Drain for Upflow Installations Install a field-supplied external condensate pan underneath the entire vertical air handler unit to avoid damage due to condensate overflow. Vertical / Horizontal Air Handler units have a gravity drain. • Avoid blocking filter access panel when connecting drain lines.
POWER AND CONTROL WIRING Overview Connecting Power and Control Wiring Indoor unit installation best practices are to connect control wiring (low voltage) and then connect power wiring (high voltage). Do not apply power to the indoor unit or any Multi V system component until authorized to do so by the system commissioning agent. DANGER High voltage electricity is required to operate this system. Adhere to the National Electrical Codes and these instructions when wiring.
WIRING Indoor Unit Communication Cable Connections Note: Failure to follow any of these power and communications wiring guidelines or instructions will likely cause communications errors and unit malfunction. Polarity matters. When connecting the communications cable conductors at each Multi V system component, be careful the conductor connected to the IDU(A) terminal on the outdoor unit is connected to the A/3(A) terminal at each indoor unit.
WIRING Indoor Unit Communications Cable Connections 8. Securely tighten the terminal screws to prevent the communications conductors from coming loose from the terminal block. 9. Secure the communications cable in appropriate locations outside the indoor unit to prevent damage to the cable or injury to maintenance personnel.
WIRING Indoor Unit Communication Cable Connections Figure 37: Location of Power Wiring and Communications Cable Terminals in the Built In Ducted Indoor Unit B3, B4 Frame Terminals L(L1) YL N(L2) RD BK Lock nut Power Supply High Voltage (208/230V) Conduit Ground Power Input 208-230V / 60 Hz / 1 Phase 4(B) Communications GND 12V - - Installation Manual Figure 38: Terminal Block in the Built In Ducted Indoor Units Outdoor Unit Terminal Block Indoor Unit Terminal Block SODU IDU INTERNET DRY1 DRY
WIRING Indoor Unit Power Cable Connections Connecting Power and Control Wiring Indoor unit installation best practices are to connect control wiring (low voltage) and then connect power wiring (high voltage). Do not apply power to the indoor unit or any Multi V system component until authorized to do so by the system commissioning agent. DANGER High voltage electricity is required to operate this system. Adhere to the National Electrical Codes and these instructions when wiring.
WIRING Indoor Unit Power Cable Connections Read and understand all power-related DANGER and WARNING statements in this manual before working with power cables. Ensure the power source is disconnected from the indoor unit’s power input cable before connecting the cable. Improper connections and inadequate grounding can cause accidental injury or death. Note: Keep line voltage power away from the communications terminals.
WIRING DIP Switch Settings for Gen4 Equipment Generation 4 Equipment Multi V Ducted Indoor Units The latest versions of LG’s indoor units and outdoor (air/water source) units are designated Generation 4 (Gen 4). For Gen 4 units to operate with Gen 4 features, the air conditioning system must meet the following requirements: • All indoor units, heat recovery units, and air/water source units must be Gen 4. • All air/water source units must have Gen 4 software installed.
WIRING High-Static Ducted BH Chassis Figure 42: High-Static Ducted BH Chassis Wiring Diagram Installation Manual Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING High-Static Ducted BH Chassis Table 21: High-Static Ducted BH Chassis Wiring Diagram Multi V Ducted Indoor Units CONNECTOR PURPOSE FUNCTION CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-DAMPER N/A N/A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Displa
WIRING High-Static Ducted BG Chassis Optional Connections Figure 43 shows the control board for the BG chassis. Connect optional equipment to the control board as required for your system. Figure 43: High-Static Ducted BG Chassis Wiring Diagram Installation Manual BG-MEZ61897818 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING High-Static Ducted BG Chassis Table 23: High-Static Ducted BG Chassis Wiring Diagram Multi V Ducted Indoor Units CONNECTOR PURPOSE FUNCTION CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-VM Sub PCB to Main PCB power supply Power supply connection CN-DAMPER N/A N/A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPT
WIRING High-Static Ducted BR Chassis Optional Connections Figure 44 shows the control board for the BR chassis. Connect optional equipment to the control board as required for your system. Figure 44: High-Static Ducted BR Chassis Wiring Diagram Installation Manual BR-MEZ66590610 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING High-Static Ducted BR Chassis Table 25: High-Static Ducted BR Chassis Wiring Diagram Multi V Ducted Indoor Units CONNECTOR PURPOSE FUNCTION CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC CN-VM Sub PCB to Main PCB power supply Power supply connection CN-DAMPER N/A N/A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connecti
WIRING High-Static Ducted B8 Chassis Optional Connections Figure 45 shows the control board for the B8 chassis. Connect optional equipment to the control board as required for your system. Figure 45: High-Static Ducted B8 Chassis Wiring Diagram Installation Manual B8-MEZ66590612 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING High-Static Ducted B8 Chassis Table 27: High-Static Ducted B8 Chassis Wiring Diagram Multi V Ducted Indoor Units CONNECTOR PURPOSE FUNCTION CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC CN-VM Sub PCB to Main PCB power supply Power supply connection CN-DAMPER N/A N/A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connect
WIRING Low-Static Ducted L1 Chassis Optional Connections Figure 46 shows the control board for the L1 chassis. Connect optional equipment to the control board as required for your system. Figure 46: Low-Static Ducted L1 Chassis Wiring Diagram Installation Manual L1-MEZ66590602 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING Low-Static Ducted L1 Chassis Table 29: Low-Static Ducted L1 Chassis Wiring Diagram Multi V Ducted Indoor Units CONNECTOR PURPOSE FUNCTION CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-DAMPER N/A N/A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display
WIRING Low-Static Ducted L2/L3 Chassis Optional Connections Figure 47 shows the control board for the L2/L3 chassis. Connect optional equipment to the control board as required for your system. Figure 47: Low-Static Ducted L2/L3 Chassis Wiring Diagram Installation Manual L2L3-MEZ66590604 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING Low-Static Ducted L2/L3 Chassis Table 31: Low-Static Ducted L2/L3 Chassis Wiring Diagram Multi V Ducted Indoor Units CONNECTOR PURPOSE FUNCTION CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC CN-DAMPER N/A N/A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Option
WIRING Low-Static Built-In B3/B4 Chassis Optional Connections Figure 48 shows the control board for the L1 chassis. Connect optional equipment to the control board as required for your system. Figure 48: Low-Static Built-In B3/B4 Chassis Wiring Diagram Installation Manual B3B4-MEZ51186311 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved.
WIRING Low-Static Built-In B3/B4 Chassis Table 33: Low-Static Built-In B3/B4 Chassis Wiring Diagram Multi V Ducted Indoor Units CONNECTOR PURPOSE FUNCTION CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC CN-VM Sub PC power supply Power supply connection CN-FLOAT Float switch input Float switch sensing CN-ZONE Zone controller Zone controller connection CN-EEV EEV Output EEV control output CN-OPTIO
WIRING Vertical Air Handler NJ Chassis Optional Connections Figure 49 shows the control board for the NJ chassis. Connect optional equipment to the control board as required for your system. Figure 49: Vertical Air Handler NJ Chassis Wiring Diagram Installation Manual NJ-MEZ62689314 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING Vertical Air Handler NJ Chassis Table 35: NJ Frame Wiring Diagram Legend.
WIRING Vertical Air Handler NK Chassis Optional Connections Figure 49 shows the control board for the NK chassis. Connect optional equipment to the control board as required for your system. Figure 50: Vertical Air Handler NK Chassis Wiring Diagram Installation Manual NK-MEZ62689315 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
WIRING Vertical Air Handler NK Chassis Table 37: NK Frame Wiring Diagram Legend.
WIRING Optional Wall-Mounted Sensor and Controller Wall-Mounted Sensor Installation Proper indoor unit operation depends on the location of the room sensor. A good location will protect the zone controller from direct sunlight and external local sources of water vapor, and heated or cooled air. If no mounting height was specified by the building designer, place the handy box approximately fifty-five (55) inches above the finished floor.
CONTROLS SETUP Controlling the Indoor Unit The method and configuration of controlling the indoor unit will vary according to your system’s requirements. • • • • • • • It is possible to control up to 16 indoor units with one wired remote controller. Set only one indoor unit in a group to master; set the others to slave. This indoor unit can be connected in a control group with any other types of LG indoor units. It is possible to use a wireless remote controller at the same time as the wall controller.
CONTROLS SETUP Group Control Figure 53, Figure 54, and Figure 55 show examples of typical control configurations. Figure 53 shows one wired remote controller configured as a Master to control a group of indoor units. Figure 54 shows two wired remote controllers, one configured as a Master and the other as a Slave. Figure 55 shows a system with indoor units and fresh air units configured as two groups, each with a Master wired controller.
CONTROLS SETUP Figure 55: Group Control - Method 3 LGAP Network System LGMV AC Smart ACP Bacnet/ACP LON (Optional) Other Building Mgmt System (Optional) Dry Contact (Optional) Multi V Ducted Indoor Units FAU Master FAU Slave Display Error Message Master Master Display Error Message Slave ▪ Connect Signal and GND lines to slave indoor units Master 12V ▪ Do not connect 12V line to slave indoor units Signal GND Figure 56: Control Wiring with Standard IDU and Fresh Air Unit Correct Control Wir
CONTROLS SETUP Remote Control Figure 57 shows an example of a remote control configuration. Figure 57: Remote Control LGAP Network System LGMV AC Smart ACP Bacnet/ACP LON (Optional) Other Building Mgmt System (Optional) Dry Contact (Optional) Display Error Message 12V Signal Installation Manual Remote Sensor Master GND Master Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ.
INSTALLATION CHECKLIST PAGE 1 of 2 System ID No.:__________________________________________________ Indoor Unit ID.:_____________________________________ 4-Way Cassette Indoor Unit Checked by:___________________________________ Date:__________________ Signature:____________________________________ Rough-In Packing materials and literature removed from fan discharge. Airflow direction correct. Fan wheels spin without obstruction. Unit is properly supported – mounting bolts tight.
INSTALLATION CHECKLIST PAGE 2 of 2 System ID No.:__________________________________________________ Indoor Unit ID.:_____________________________________ Checked by:___________________________________ Date:__________________ Signature:____________________________________ Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Multi V Ducted Indoor Units 78 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Who to call for assistance Your LG Manufacturer Representative Your LG Manufacturer Representative Your LG Manufacturer Representative Your LG Manufacturer Representative 1-888-865-3026 Installation Manual Freight Damage and Unit Replacements Missing Parts Freight Damage and Unit Replacements Received Wrong Indoor Unit Model Installation, Startup, and Commissioning Technical Assistance For warranty information, visit www.lghvac.com.
20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics Commercial Air Conditioning Division 11405 Old Roswell Road Alpharetta, Georgia 30009 www.lghvac.com LG Customer Information Center, Commercial Products 1-888-865-3026 USA Follow the prompts for commercial A/C products and parts.
