FLOOR STANDING, CEILING SUSPENDED, AND CONVERTIBLE SURFACE MOUNTED INDOOR UNIT ENGINEERING MANUAL

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1 EM_MultiV_FloorSuspendConvert_IndoorUnits_5_15 FLOOR STANDING, CEILING SUSPENDED, AND CONVERTIBLE SURFACE MOUNTED INDOOR UNIT ENGINEERING MANUAL Cased Uncased Floor Standing 7,5 to 24,2 Btu/h Ceiling Suspended 19,1 and 24,2 Btu/h Convertible Surface Mounted 9,6 and 12,3 Btu/h

2 PROPRIETARY DATA NOTICE This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc., and are disclosed by LG Electronics U.S.A., Inc. only in confidence. This document is for design purposes only. A summary list of safety precautions is on page 3. For more technical materials such as submittals, catalogs, installation, owner s, and service manuals, visit For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice. LG Electronics U.S.A., Inc.

3 TABLE OF CONTENTS Unit Nomenclature... 4 Indoor Unit Overview... 5 Controllers Overview... 8 LATS Overview Floor Standing Indoor Units Mechanical Specifications General Data Electrical Data... 2 External Dimensions Electrical Wiring Diagrams Refrigerant Flow Diagrams Acoustic Data Air Velocity / Temperature Distribution Capacity Tables Ceiling Suspended Indoor Units Mechanical Specifications General Data Electrical Data External Dimensions... 4 Electrical Wiring Diagram Refrigerant Flow Diagram Acoustic Data Air Velocity / Temperature Distribution Capacity Tables Convertible Surface Mounted Indoor Units Mechanical Specifications... 5 General Data Electrical Data External Dimensions Electrical Wiring Diagram Refrigerant Flow Diagram Acoustic Data Air Velocity / Temperature Distribution Capacity Tables Application Guidelines Selecting the Best Location General Mounting General Drain Piping Information Wiring Guidelines Wired Remote Controller Location Acronyms Introduction TABLE OF SYMBOLS DANGER CAUTION This symbol indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. This symbol indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury. This symbol indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. This symbol indicates situations that may result in equipment or property damage accidents only. This symbol indicates an action should not be completed. INTRODUCTION 3

4 UNIT NOMENCLATURE ARN U 7 3 TN C 4 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Family ARN = Multi V Indoor Unit (Refrigerant R41A) Type U = DC Inverter Heat Pump Indoor Unit Nominal Capacity 5 = 5, Btu/h 18 = 18, Btu/h 7 = 7, Btu/h 24 = 24, Btu/h 9 = 9, Btu/h 28 = 28, Btu/h 12 = 12, Btu/h 3 = 3, Btu/h 15 = 15, Btu/h 36 = 36, Btu/h Electrical Ratings 3 = 28 23V/6Hz/1Ph Model B3 = Ducted (low static - bottom return) B4 = Ducted (low static - bottom return) B8 = Ducted (high static) BG = Ducted (high static) BR = Ducted (high static) CE = Floor Standing (small frame) CF = Floor Standing (large frame) L1 = Ducted (low static) Generation 2 = Second 4 = Fourth A = Second, Revision A 42 = 42, Btu/h 48 = 48, Btu/h 54 = 54, Btu/h 76 = 76, Btu/h 96 = 96, Btu/h L2 = Ducted (low static) L3 = Ducted (low static) NJ = Vertical/Horizontal Air Handling Unit NK = Vertical/Horizontal Air Handling Unit SB = Wall Mounted SC = Wall Mounted TT = 1-Way Ceiling Cassette TU = 1-Way Ceiling Cassette TL = 2-Way Ceiling Cassette TM = 4-Way Ceiling Cassette TN = 4-Way Ceiling Cassette TP = 4-Way Ceiling Cassette TQ = 4-Way Ceiling Cassette TR = 4-Way Ceiling Cassette VE = Convertible Surface Mounted VJ = Ceiling Suspended Feature A, C, L, R = Standard* U = Uncased G = Low Static *Plasma filter kit accessories are available separately. Always follow all local, state, and national building codes with the use of this or any product. 4 INTRODUCTION

5 INDOOR UNIT OVERVIEW Wall-Mounted / Ceiling Cassette Table 1: Wall-Mounted / Ceiling Cassette Indoor Units. Unit/Type 1 ARNU***** 2 (W x D x H) Dimensions (inches) Wall Mounted ART COOL TM Mirror Wall Mounted Standard Ceiling Cassette One Way Ceiling Cassette Two Way Nominal Capacity Btu/h Cooling 3 Heating 3 Air Flow Rate (CFM) (H/M/L 4 ) Weight (lbs.) Pipe Connections (inches, O.D.) (Liquid, Vapor) 53 SBR4 5,5 6,1 23/212/ SBR4 7,5 8,5 247/23/ SBR4 35-1/4 x 8-1/8 x 11-7/16 9,6 1,9 29/247/ SBR4 12,3 13,6 336/29/23 1/4, 1/2 153 SBR4 15,4 17,1 371/318/ SCR4 19,1 21,5 441/424/ /16 x 9-11/16 x 12-13/ SCR4 24,2 27,3 494/449/46 3/8, 5/8 53 SBL4 5,5 6,1 1,12/1,8/1,5 73 SBL4 7,5 8,5 1,19/1,12/1,5 93 SBL4 35-1/4 x 8-15/16 x 11-7/16 9,6 1,9 1,26/1,19/1, SBL4 12,3 13,6 1,42/1,26/1,12 1/4, 1/2 153 SBL4 15,4 17,1 1,55/1,35/1, SCL4 19,1 21,5 1,12/1,5/98 4-5/16 x 9-7/8 x 12-13/ SCL4 24,2 27,3 1,28/1,14/1, 3/8, 5/8 73 TUC4 7,5 8,5 29/258/226 Body: 33-7/8 x 17-3/4 x 6-11/16 Body: TUC4 9,6 1,9 325/34/29 Panel: 43-5/16 x 19-3/4 x 1-3/8 Panel: 1 1/4, 1/2 123 TUC4 12,3 13,6 353/325/ TTC4 Body: 46-1/2 x 17-3/4 x 6-7/8 19,1 21,5 47/427/385 Body: TTC4 Panel: 55-15/16 x 19-3/4 x 1-3/8 24,2 24,2 515/47/46 Panel: 13 3/8, 5/8 183 TLC4 19,1 21,5 459/424/353 1/4, 1/2 Body: 32-11/16 x 21-5/8 x 8-7/8 Panel: 41-5/16 x 25-3/16 x 1-5/8 Body: 49 Panel: TLC4 24,2 27,3 61/53/459 3/8, 5/8 Introduction Ceiling Cassette Four Way (2' x 2') Ceiling Cassette Four Way (3' x 3') 1 All indoor units require 28 23V/6Hz/1Ph and an AWG18-2 communication cable. 2 Model number shows nominal capacity and frame size designator. 3 Nominal cooling capacity rating obtained with air entering the indoor unit at 8ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB). 53 TRC4 5,5 6,1 265/247/212 Body: TRC4 93 TRC4 Body: 22-7/16 x 22-7/16 x 8-7/16 Panel: 27-9/16 x 27-9/16 x 7/8 7,5 9,6 8,5 1,9 265/247/ /265/251 Panel: 7 Body: TRC4 12,3 13,6 37/283/247 Panel: TQC4 Body: 22-7/16 x 22-7/16 x 1-3/32 15,4 17,1 388/353/328 Body: TQC4 Panel: 27-9/16 x 27-9/16 x 7/8 19,1 21,5 396/388/353 Panel: TPC4 Body: 33-1/16 x 33-1/16 x 8 24,2 27,3 6/53/459 Body: TPC4 Panel: 37-3/8 x 37-3/8 x 1-7/16 28, 31,5 671/565/494 Panel: TNA4 7,5 8,5 459/424/ TNA4 9,6 1,9 477/424/ TNA4 12,3 13,6 494/459/424 Body: 33-1/16 x 33-1/16 x 9-11/16 Body: TNA4 15,4 17,1 53/459/424 Panel: 37-3/8 x 37-3/8 x 1-7/16 Panel: TNA4 19,1 21,5 565/53/ TNA4 24,2 27,3 742/671/6 363 TNC4 36,2 4,6 883/777/ TMA4 24,2 27,3 777/76/ TMA4 28, 31,5 812/741/635 Body: 33-1/16 x 33-1/16 x 11-5/16 Body: TMA4 36,2 4,6 918/812/76 Panel: 37-3/8 x 37-3/8 x 1-7/16 Panel: TMC4 42, 43,8 1,59/918/ TMC4 48,1 51,2 1,13/953/883 1/4, 1/2 3/8, 5/8 Nominal heating capacity rating obtained with air entering the indoor unit at 7ºF dry bulb (DB) and 6 F wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 4 H/M/L = High/Medium/Low INTRODUCTION 5

6 INDOOR UNIT OVERVIEW Ducted MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 2: Ducted Indoor Units. Unit/Type 1 ARNU***** 2 (W x D x H) Dimensions (inches) Ducted High Static Ducted Low Static Ducted Low Static - Built In Vertical/Horizontal Air Handling Unit 73 BGA4 Nominal Capacity Btu/h Cooling 3 Heating 3 Air Flow Rate (CFM) (H/M/L 4 ) 7,5 8,5 441/46/ BGA4 9,6 1,9 452/46/ BGA4 12,3 13,6 477/427/ BGA4 15,4 17,1 487/417/ BGA4 46-1/2 x 17-3/4 x 11-3/4 19,1 21,5 537/487/ BGA4 24,2 27,3 671/537/ BGA4 28, 31,5 915/851/ BGA4 36,2 4,6 1,141/1,24/ BGA4 42, 43,8 1,218/1,141/1, BRA4 48,1 51,2 1,568/1,395/1, /16 x 23-3/8 x BRA4 54, 61,4 1,819/1,678/1,395 Weight (lbs.) 84 Pipe Connections (inches, O.D.) (Liquid, Vapor) 3/8, 5/8 Max. ESP (inches) B8A4 76,4 86, 2,5/1,766/1,766 3/8, 3/4 61-1/2 x 27-1/8 x 18-1/ B8A4 95,9 17,5 2,542/2,26/2,26 3/8, 7/8 73 L1G4 7,5 8,5 27/23/2 27-9/16 x 27-9/16 x 7-1/2 93 L1G4 9,6 1,9 32/25/ L2G4 12,3 13,6 36/31/25 1/4, 1/2 153 L2G4 35-7/16 x 27-9/16 x 7-1/2 15,4 17,1 45/36/ L2G4 19,1 21,5 53/45/ L3G4 43-5/16 x 27-9/16 x 7-1/2 24, 27,3 71/57/43 6 3/8. 5/8 73 B3G4 7,5 8,5 283/229/ B3G4 9,6 1,9 318/247/ /8 x 22-5/8 x 7-1/ B3G4 12,3 13,6 353/283/229 1/4, 1/2 153 B3G4 15,4 17,1 388/353/ B4G4 19,1 21,5 494/424/ /16 x 22-5/8 x 7-1/ B4G4 24,2 27,3 6/53/353 3/8, 5/8 123 NJA4 12, 13,5 53/48/38 1/4, 1/2 183 NJA4 18, 2, 58/53/ NJA4 18 x 21-1/4 x 48-11/16 24, 27, 71/64/48 33 NJA4 3, 34, 88/8/ NJA4 36, 4, 99/88/ NKA4 42, 46, 1,25/1,1/1, 3/8, 5/8 483 NKA4 25 x 21-1/4 x 55-3/16 48, 54, 1,4/1,26/1, NKA4 54, 6, 1,475/1,4/1,26 1 All indoor units require 28 23V/6Hz/1Ph and an AWG18-2 communication cable. 2 Model number shows nominal capacity and frame size designator. 3 Nominal cooling capacity rating obtained with air entering the indoor unit at 8ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB) Nominal heating capacity rating obtained with air entering the indoor unit at 7ºF dry bulb (DB) and 6 F wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 4 H/M/L = High/Medium/Low 1. 6 INTRODUCTION

7 INDOOR UNIT OVERVIEW Surface Mounted / Floor Standing Table 3: Surface Mounted / Floor Standing Indoor Units. Unit/Type 1 ARNU**** 2 (W x D x H) Dimensions (inches) Nominal Capacity Btu/h Cooling 3 Heating 3 Air Flow Rate (CFM) (H/M/L 4 ) Weight (lbs.) Pipe Connections (inches, O.D.) (Liquid, Vapor) Ceiling Suspended 183VJA2 19,1 21,5 565/495/424 1/4, 1/2 37-7/16 x 8-11/16 x 25-5/ VJA2 24,2 27,3 636/565/495 3/8, 5/8 Convertible Surface Mounted 93VEA2 9,6 1,9 268/243/ /16 x 7-7/8 x 19-5/16 123VEA2 12,3 13,6 325/268/ /4, 1/2 Floor Standing Cased 73 CEA4 7,5 8,5 3/265/ CEA4 9,6 1,9 335/3/ x 8 x CEA4 12,3 13,6 371/335/3 153 CEA4 15,4 17,1 46/353/ /4, 1/2 Introduction 183 CFA4 19,1 21,5 565/494/ /16 x 8 x CFA4 24,2 27,3 635/565/494 3/8, 5/8 Floor Standing Uncased 73 CEU4 7,5 8,5 3/265/ CEU4 9,6 1,9 335/3/ /2 x 7-15/16 x 25-3/ CEU4 12,3 13,6 371/335/3 46 1/4, 1/2 153 CEU4 15,4 17,1 46/353/ CFU4 19,1 21,5 565/494/ /16 x 7-1/2 x 25-3/ CFU4 24,2 27,3 635/565/494 3/8, 5/8 1 All indoor units require 28 23V/6Hz/1Ph and an AWG18-2 communication cable. 2 Model number shows nominal capacity and frame size designator. 3 Nominal cooling capacity rating obtained with air entering the indoor unit at 8ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB). Nominal heating capacity rating obtained with air entering the indoor unit at 7ºF dry bulb (DB) and 6 F wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 4 H/M/L = High/Medium/Low INTRODUCTION 7

8 CONTROLLERS OVERVIEW Zone Controllers and Communication Cables Table 4: Zone Controllers. Zone Controller Name Model No. Case Color Max Wire Length (ft) Description MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Simple Controller with mode selection Simple Controller without mode selection LG Premium Controller LG Programmable Thermostat PQRCVCLQ PQRCVCLQW PQRCHCAQ PQRCHCAQW Black White Black White PREMTA Ivory 164 PREMTB1U White 164 Wireless Handheld PQWRHQFDB Ivory ---- Wall-Mounted Remote Temperature Sensor PQRSTA Ivory 5 Allows control of indoor unit on/off, operation mode, fan speed, and temperature setpoint for up to 16 indoor units. Allows control of indoor unit on/off, fan speed, and temperature setpoint for up to 16 indoor units. Allows control of indoor unit on/off, operation mode, occupied/ unoccupied temperature setpoints, fan speed, and air flow direction for up to 16 indoor units. Programmable schedule with 5 events per day with control of occupied/unoccupied, on/off, mode, setpoints and fan speed. Advanced functions include two setpoint autochangeover, minimum difference between setpoints, setback, timed override, target energy consumption display, check energy display and master/slave. Allows control of indoor unit on/off, operation mode, occupied and unoccupied temperature setpoints, fan speed, and airflow direction for up to 16 indoor units. Programmable schedule with 5 events per day with control of occupied unoccupied, on/off, mode, setpoints and fan speed. Advanced functions include two setpoint autochangeover, minimum difference between setpoints, setback and timed override. Allows control of indoor unit on/off, operation mode, fan speed, and temperature setpoint. Allows remote temperature measurement for cassette and ducted units. Before specifying or placing an order, refer to the V-Net Network Solution Engineering Product Data Book and review the detailed technical data provided to fully understand the capabilities and limitations of these devices. For information on controller compatibility refer to the Controls and Options Tables on pages 12 and 13. Table 5: Zone Controller Communication Cables. Communication Cable Name Model No. Wire Length (ft.) Description Wired Remote Group Control Cable Assembly PZCWRCG3 33 Required when grouping multiple indoor units with a single zone controller. Wired Remote/Group Control Extension Cable PZCWRC1 33 Increases the distance between a remote controller and an indoor unit or between indoor units in a control group. Before specifying or placing an order, refer to the V-Net Network Solution Engineering Product Data Book and review the detailed technical data provided to fully understand the capabilities and limitations of these devices. For information on controller compatibility refer to the Controls and Options Tables on pages 12 and INTRODUCTION

9 CONTROLLERS OVERVIEW Specialty Application Devices Table 6: Specialty Application Devices. Specialty Application Device Name Simple Dry Contact Dry Contact for Economizer, occupied/ unoccupied Dry Contact Unit for 24V Thermostat Model No. PQDSB1 PQDSBC1 PDRYCB3 Connect to Indoor Unit Application On/Off, Run Status, Error Status On/Off, Mode, Controller Lock, Power Save, Run Status, Error Status On/Off, Thermo On/ Off, Mode, Fan Speed, Run Status, Error Status Binary Signals Input/ Output 1/2 2/2 --- Description Enables the indoor unit to be controlled and monitored by third party controls using binary inputs and outputs. Enables the indoor unit to be controlled and monitored by a third party thermostat or controller. Digital Output (DO) Kit PQNFPT Comm Bus On/Off /1 One 25A DPST normally open relay. Used with central controller to control third party device manually or by schedule. I/O Module PEXPMB. ENCXLUS AC Smart IV and ACP IV Third party equipment control. Allows system expansion through Digital and Analog inputs and outputs Digital Inputs: Dry Contact input only 3 Digital Outputs: Max. 2A@3VAC/DC 4 Analog Outputs: to 1 VDC, configurable; to 2 ma, configurable 4 Universal Inputs individually configurable as analog or digital: Analog: Voltage. Current. Thermistor (NTC, PT, Ni) Digital for Dry Contact input only Introduction Auxiliary Heater Relay Kit PRARH PRARS Indoor Unit Third party supplemental heat control /1 Adds coordinated control of an external heater with normal heat pump operations. Auxiliary Two-Stage Heater Relay Kit PRARH1 Indoor Unit Third party supplemental heat control /2 Adds coordinated control of an external heater with normal heat pump operations. Power Distribution Indicator (PDI) Premium PQNUD1S41 Comm Bus Energy consumption monitoring 8 Watt Node Meters Monitors total outdoor unit power consumption for up to eight systems, and distributes per indoor unit based on weighted calculation. Mode Selector Switch PRDSBM Outdoor Unit Multi V Heat Pump Only --- Locks outdoor unit into Heat, Cool, or Fan Mode. Before specifying or placing an order, refer to the V-Net Network Solution Engineering Product Data Book and review the detailed technical data provided to fully understand the capabilities and limitations of these devices. For information on controller compatibility refer to the Controls and Options Tables on pages 12 and 13. INTRODUCTION 9

10 CONTROLLERS OVERVIEW Central Controllers MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 7: Central Controllers (connect to the outdoor unit terminals Internet A, Internet B). Central Controller Name AC Smart IV Model No. PACS4B. ENCXLUS Devices per Controller Systems per Comm Bus Devices per Comm Bus No. of Comm Bus Ports Binary Signals Input/ Output 2 DI / 2 DO AC Ez PQCSZ25S Advanced Control Platform IV (ACP IV) PACP4B. ENCXLUS Power, Conn 24 VAC 12 VDC, ODU /4 24 VAC Description Monitors / operates indoor units through a touch screen. Manages up to 128 devices. Advanced functions include programmable schedules, temperature setpoint range lock, remote controller lock, run time limit, manual control and scheduling of digital output kit, peak/demand control, visual floor plan navigation, web access, operation and error history log, one digital input and two digital outputs for device interlocking and error notification. Provides for scheduling in addition to basic indoor unit control and monitoring. Provides for scheduling, remote controller lock, setpoint range limit, web access, peak/demand control, PDI integration, and AC Manager Plus integration advanced functionality in addition to basic unit control and monitoring. Before specifying or placing an order, refer to the V-Net Network Solution Engineering Product Data Book and review the detailed technical data provided to fully understand the capabilities and limitations of these devices. For information on controller compatibility refer to the Controls and Options Tables on pages 12 and INTRODUCTION

11 Introduction CONTROLLERS OVERVIEW Integration Solutions Table 8: Summary Data Integration Solutions (connect to outdoor unit terminals Internet A, Internet B). Integration Solution Name ACP IV BACnet Gateway* LonWorks Gateway* Model No. Devices per Controller Systems per Comm Bus Devices per Comm Bus No. of Comm Bus Ports Power Binary Signals Input/ Output Description PQNFB17C1 PLNWKB VAC 24 VAC 1/4 2/2 Allow integration of LG equipment for control and monitoring by open protocol BACnet and LonWorks building automation and controls systems.* Before specifying or placing an order, refer to the V-Net Network Solution Engineering Product Data Book and review the detailed technical data provided to fully understand the capabilities and limitations of these devices. For information on controller compatibility refer to the Controls and Options Tables on pages 12 and 13. * BACnet TM is a trademark of ASHRAE; LonWorks TM is a trademark of Echlelon Corporation. INTRODUCTION 11

12 CONTROLLERS OVERVIEW Options and Features Table 9: Options and Features. MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Airflow Operation Filter Controllers Others Feature Wall Mounted Standard Finish Wall Mounted ART COOL Mirror 1-Way Cassette 2-Way Cassette 4-Way Cassette Ducted High Static = Standard feature o = Unit option Ducted Low Static Nominal Chassis Size (MBh) Air supply outlets Airflow direction (left/right) manual auto Auto airflow direction (up/down) Fan speed (Heating mode) Fan speed (Cooling mode) Fan speed (fan mode) Chaos swing (random louver swing) Chaos wind (random fan speed) Jet-cool (power cooling) E.S.P. control High ceiling Auto-restart after power restore Hot start Diagnostics Auto changeover 1 Auto operation 6 Auto clean (coil dry) Child lock Dual thermistor control Dual set-point control Filter life display Power consumption display (with PDI) Forced operation Group control Requires the use of one Group control cable kit (PZCWRCG3) for every additional indoor unit Timer (on/off) Weekly schedule Test operation mode Plasma 3 o o o o o Washable anti-fungal 2 7-day programmable controller o o o o o o o o Simple controller w/mode o o o o o o o o Simple controller w/o mode o o o o o o o o Wireless controller o o o o o o o 4 o 4 Condensate lift Ventilation air 5 5 Casing Standard grille Auto elevation grille o Suction grille Suction canvas Aux. heat kit 1 For Heat Recovery systems only. 2 Primary washable filters. 3 Plasma filter kit accessories available separately, except for ArtCool Mirror which is included as standard. 4 Requires 7-day programmable zone controller. 5 Requires ventilation kit PTVK43 or PTVK41+PTVK42 (For TP, TN, TM frames)(temperature, humidity, and volume limitations apply). 6 Heat Pump systems only. 12 INTRODUCTION

13 CONTROLLERS OVERVIEW Options and Features Table 1: Options and Features, continued. Feature Ducted Low Static Bottom Return Vert.-Horiz. AHU (NJ) Vert.-Horiz. AHU (NK) Ceiling Suspended Convertible Surface Mount Floor Mount Cased Floor Mount Uncased Airflow Operation Filter Controllers Others Nominal Chassis Size (MBh) Air supply outlets Airflow direction (left/right) manual manual Auto airflow direction (up/down) Fan speed (Heating mode) Fan speed (Cooling mode) Fan speed (fan mode) Chaos swing (random louver swing) Chaos wind (random fan speed) Jet-cool (power cooling) E.S.P. control Auto-restart after power restore Hot start Diagnostics Auto changeover 1 Auto operation 6 Auto clean (coil dry) Child lock Dual thermistor control Dual set-point control Filter life display Power consumption display (with PDI) Forced operation Group control Requires the use of one Group control cable kit (PZCWRCG3) for every additional indoor unit Timer (on/off) Weekly schedule Test operation mode Plasma 3 Washable anti-fungal 2 7-day programmable controller o o o o o Simple controller w/mode o o o o o o o Simple controller w/o mode o o o o o o o Wireless controller o 4 o o o o o 4 o 4 Condensate lift Ventilation air Casing Standard grille Auto elevation grille Suction grille o Suction canvas o Aux. heat kit 1 For Heat Recovery systems only. 2 Primary washable filters. 3 Plasma filter kit accessories available separately, except for ArtCool Mirror which is included as standard. 4 Requires 7-day programmable zone controller. 5 Requires ventilation kit PTVK43 or PTVK41+PTVK42 (For TP, TN, TM frames)(temperature, humidity, and volume limitations apply). 6 Heat Pump systems only. = Standard feature o = Unit option Introduction INTRODUCTION 13

14 LATS MULTI V PIPING DESIGN SOFTWARE MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual The proper design and installation of the refrigerant piping system is a critical element of a Multi V system. Multi V Heat Pump systems require two pipes between components a liquid line and a vapor line. Multi V Heat Recovery systems require three pipes between the outdoor unit and the heat recovery unit a liquid line, a low-pressure vapor line, and a high-pressure vapor line. A properly designed refrigerant piping system ensures that refrigerant is delivered to the indoor unit coils for optimal system performance and capacity. LG Air Conditioner Technical Solution (LATS) software is a total design solution for LG Multi V air conditioning systems. This Windows -based application assists the design engineer with specifying and sizing outdoor and indoor units (by calculating component capacity based on design conditions), laying out the refrigeration distribution pipe system, checking piping limitations, calculating refrigerant charge, and generating equipment schedules and piping diagrams in (.dxf) format for use on CAD building design drawings.* * Windows is a registered mark of Microsoft Corporation. To ensure that the refrigerant piping design meets LG s quality standards, a LATS refrigerant piping design must be provided with every Multi V order. Following the installation, if any changes or variations to the design are necessary, a new LATS file must be created and provided to LG prior to system commissioning to ensure the proper pipe size has not changed. Design Choices LATS Multi V software is flexible, offering the HVAC system engineer an easy to use Tree mode. Tree Mode Using the Tree mode, the engineer can quickly create a one-line schematic drawing of a Multi V system. Integration of the engineered pipe system into the building drawings is done at a later date by the draftsperson using standard drafting software tools. Import building loads from an external file (.xls format). System components selected using an easy drag and drop process. Automatically analyzes and checks the design complies with most piping design limitations. Sizes refrigerant piping. Generates a system engineering report (.xls format). Generates an equipment schedule (.xls or.dxf format). Generates a system piping diagram (.dxf format). LATS Report LATS Multi V software generates a report file (.xls format) containing project design parameters, cooling and heating design day system component performance, and capacity data. The report calculates the system combination ratio, calculates the system refrigerant charge, and provides detailed bill of material information including a list of Multi V outdoor units, air handlers, control devices, accessories, refrigerant pipe sizes segregated by building, by system, by pipe size, and by pipe segments. Figure 1: Screenshot of LATS Pipe System Design Tool in Tree Mode. 14 INTRODUCTION

15 FLOOR STANDING Mechanical Specifications on page 16 General Data on page 18 Electrical Data on page 2 External Dimensions on page 21 Electrical Wiring Diagram on page 23 Refrigerant Flow Diagrams on page 25 Acoustic Data on page 26 Air Velocity / Temperature Distribution on page 29 Capacity Tables on page 32 Cased Uncased

16 FLOOR STANDING Mechanical Specifications MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Casing Cased The case is designed to be free standing on the floor against a vertical surface. The backplane of the unit allows secure attachment of the unit to a vertical surface. Supply air is vertical from the top of the unit with a bottom front return through a toe slot at floor level. The supply air opening is covered with an architectural grille. The unit is manufactured using coated metal with an off-white ABS architectural polymeric resin exterior case. Cold surfaces are covered with a coated polystyrene insulating material. Flip open controller access doors cover the controller mounting bays located on both ends of the top panel. A polymeric resin coated metal safety grille is provided behind the removable filters located in the toe space to prevent reach access to the fan wheel. Uncased The unit case is designed to be concealed in a field-provided architectural enclosure. The unit case is manufactured using coated metal. Cold surfaces are covered with a coated polystyrene insulating material. The back plane of the unit has two side mounting flanges with bolt holes for hanging the unit on a vertical wall near the floor. Airflow is vertical from the bottom to the top. A polymeric resin coated metal safety grille is provided behind the removable filters located at the return air opening to prevent reach access to the fan wheels. Fan Assembly and Control 7 15 MBh The unit has three Sirocco fans mounted on a common shaft and made of high strength ABS HT-7 polymeric resin. The fan shaft is directly driven by a single digitally-controlled inverter fan motor MBh The unit has two independent fan assemblies consisting of two motors and four fans. Each assembly consists of two Sirocco fans made of high strength ABS HT-7 polymeric resin. Each pair of fans are mounted on a common shaft and driven directly by a single digitally controlled inverter motor. Fan Motors The fan motors are a Brushless Digitally Controlled (BLDC) design with permanently lubricated and sealed ball bearings. The fan motor includes thermal, overcurrent and low RPM protection. The fan/motor assembly is mounted in vibration attenuating rubber grommets. The fan impeller is statically and dynamically balanced. The fan speed is controlled using a microprocessor-based direct digital control algorithm that provides a high fan speed in cooling thermal ON and low fan speed in cooling thermal OFF, high fan speed in heating thermal ON and fan off in heating thermal OFF. The fan speeds can be field adjusted between low, medium, and high speeds. The fan speed algorithm provides a field-selectable fixed or auto-speed setting that adjusts fan speed to simulate natural airflow. Cased Air Filter Return air is filtered using two (2) removable, washable filters with anti-fungal treatment on the 7-15 MBh models and three (3) removable, washable filters with anti-fungal treatment on the MBh models. Access to the filter media is from the return air toe slot located on the front of the unit without removing unit panels. Microprocessor Control The unit is provided with an integrated microprocessor-based controller. A temperature thermistor is factory-mounted in the return air stream. The controller is capable of performing functions necessary to operate the system without the use of a separate unit or wall-mounted controller. All unit operation parameters, excluding the operation schedule, are stored in non-volatile memory resident on the unit microprocessor. Operating schedules are stored in select models of the optional unit or wall-mounted, local or central controller. The field-supplied communication cable between the indoor unit(s) and outdoor unit is to be a minimum of 18 AWG, 2 conductor, stranded, and shielded cable (RS-485), terminated via screw terminals on the control boards. The microprocessor control provides the following functions: auto addressing, self-diagnostics, auto restart following power restoration, test run, and will operate the indoor unit using one of five operating modes: 1. Auto Changeover (Heat Recovery only) 2. Heating 3. Cooling 4. Dry 5. Fan Only Uncased For Heat Recovery systems the Auto Changeover setting automatically switches between cooling and heating modes based on room temperature conditions. For Heat Pump systems, heated or cooled air delivery is dependent upon outdoor unit operating mode. In Heating mode, the microprocessor control will activate the indoor unit when indoor room temperature falls below set-point temperature and signals the outdoor unit to begin the heating cycle. The indoor unit fan operation is delayed until coil pipe temperature reaches 76ºF. Significant airflow is generated when pipe temperature reaches 8 F. In lieu of factory return air thermistor, screw terminals on the microprocessor circuit board accommodate various models of wall 16 FLOOR STANDING

17 FLOOR STANDING Mechanical Specifications or unit-mounted local controllers and/or a wall-mounted remote temperature sensor. The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either: 1. Wall or unit mounted wired controller(s) 2. Factory mounted return air thermistor or the optional wallmounted wired remote temperature sensor Condensate Drain Pan The condensate drain pan is constructed of expandable polystyrene resin (EPS). Coil The indoor unit coil is constructed with grooved design copper tubes with slit coil fins, two (2) rows, nineteen (19) fins per inch. The microprocessor controls space temperature using the value provided by the temperature sensor sensing a space temperature that is farthest away from the temperature set-point. The microprocessor control provides a cooling or heating mode test cycle that operates the unit for 18 minutes without regard to the space temperature. If the system is provided with an optional local or central controller, displayed diagnostic codes are specific, alpha numeric, and provide the service technician with the reason for the code displayed. Handling Condensate The unit is designed to provide gravity draining of condensate. LG provides a factory insulated flexible drain hose. If condensate lifts/ pumps are needed for the application, they are to be field-provided. Condensate float safety switch connections are available on the main control board for connection of a field supplied float safety switch. Controls Features Auto changeover (Heat Recovery only) Auto operation Auto restart Child lock Dual thermistor control Dual set-point control Filter life and power consumption display Multiple auxiliary heater applications Fan speed control Group control Hot start Self diagnostics Timer (on / off) Weekly schedule Floor Standing FLOOR STANDING 17

18 FLOOR STANDING General Data CEA, CFA Cased Units MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 11: Cased Floor Standing (CEA, CFA) Indoor Unit General Data. Model No. ARNU73CEA4 ARNU93CEA4 ARNU123CEA4 ARNU153CEA4 ARNU183CFA4 ARNU243CFA4 Cooling Mode Performance Capacity (Btu/h) 7,5 9,6 12,3 15,4 19,1 24,2 Power Input 1 (W) Heating Mode Performance Capacity (Btu/h) 8,5 1,9 13,6 17,1 21,5 27,3 Power Input 1 (W) Entering Mixed Air Cooling Max. ( F WB) Heating Min. ( F DB) Unit Data Refrigerant Type 2 R41A R41A R41A R41A R41A R41A Refrigerant Control EEV EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 35 / 33 / / 34 / / 35 / / 37 / 35 4 / 37 / / 4 / 37 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Fan Type Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) High Mode (Factory Set) 3 / 265 / / 3 / / 335 / 3 46 / 353 / / 494 / / 565 / 494 External Static Pressure (in. wg) High Mode (Factory Set) Piping Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare Condensate Line (in., I.D.) EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national codes. This unit comes with a dry nitrogen charge. This data is rated ft above sea level, with 25 ft of refrigerant line per indoor unit and a ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-15%. Cooling capacity rating obtained with air entering the indoor coil at 8ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB). Heating capacity rating obtained with air entering the indoor unit at 7ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 1 Power Input is rated at high speed. 2 Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy R41A refrigerant according to applicable regulations (4 CFR Part 82, Subpart F) under section 68 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. 18 FLOOR STANDING

19 FLOOR STANDING General Data CEU, CFU Uncased Units Table 12: Uncased Floor Standing (CEU, CFU) Indoor Unit General Data. Model No. ARNU73CEU4 ARNU93CEU4 ARNU123CEU4 ARNU153CEU4 ARNU183CFU4 ARNU243CFU4 Cooling Mode Performance Capacity (Btu/h) 7,5 9,6 12,3 15,4 19,1 24,2 Power Input 1 (W) Heating Mode Performance Capacity (Btu/h) 8,5 1,9 13,6 17,1 21,5 27,3 Power Input 1 (W) Entering Mixed Air Cooling Max. ( F WB) Heating Min. ( F DB) Unit Data Refrigerant Type 2 R41A R41A R41A R41A R41A R41A Refrigerant Control EEV EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 35 / 33 / / 34 / / 35 / / 37 / 35 4 / 37 / / 4 / 37 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Fan Type Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) High Mode (Factory Set) 3 / 265 / / 3 / / 335 / 3 46 / 353 / / 494 / / 565 / 494 External Static Pressure (in. wg) High Mode (Factory Set) Piping Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare Condensate Line (in., I.D.) EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national codes. This unit comes with a dry nitrogen charge. This data is rated ft above sea level, with 25 ft of refrigerant line per indoor unit and a ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-15%. Cooling capacity rating obtained with air entering the indoor coil at 8ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB). Heating capacity rating obtained with air entering the indoor unit at 7ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 1 Power Input is rated at high speed. 2 Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy R41A refrigerant according to applicable regulations (4 CFR Part 82, Subpart F) under section 68 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. Floor Standing FLOOR STANDING 19

20 FLOOR STANDING Electrical Data MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 13: Floor Standing (CEA, CFA [Cased]; CEU, CFU [Uncased]) Indoor Unit Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) CEA / CFA (Cased) Units ARNU73CEA Power Supply Power Input (W) Hz Volts Phase Cooling Heating ARNU93CEA ARNU123CEA ARNU153CEA ARNU183CFA ARNU243CFA CEU / CFU (Uncased) Units ARNU73CEU ARNU93CEU ARNU123CEU ARNU153CEU ARNU183CFU ARNU243CFU MCA : Minimum Circuit Ampacity. MOP : Maximum Overcurrent Protection. Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits. Select wire size based on the larger MCA value. Instead of fuse, use the circuit breaker. 2 FLOOR STANDING

21 FLOOR STANDING External Dimensions CEA Cased, CEU Uncased Units Figure 2: ARNU73~153CEA4, ARNU73~153CEU4 Dimensions Air Supply 8 15/16 2-3/4 25 Air Return 5-13/16 With Case 5-13/ /2 31-5/16 1/2 7-15/16 6-5/16 1/2 Floor Standing 25-3/16 3/4 Without Case 2-1/2 Unit: inches Note: All measurements have a tolerance of ±1/4 in. Model ARNU73CEA4 ARNU93CEA4 ARNU123CEA4 ARNU153CEA4 ARNU73CEU4 ARNU93CEU4 ARNU123CEU4 ARNU153CEU4 W H D /2 25-3/ /16 FLOOR STANDING 21

22 FLOOR STANDING External Dimensions CFA Cased, CFU Uncased Units Figure 3: ARNU CFA4, ARNU CFU4 Dimensions. MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual /32 13/ /16 2-3/4 Air Return 52-15/ /4 With Case 49-7/ /4 42-3/16 Air Supply 1-15/16 2-3/ /16 4-5/16 1-3/ /16 3-3/ /2 6-5/16 1/2 Without Case Unit: inches Note: All measurements have a tolerance of ±1/4 in. Model ARNU183CFA4 ARNU243CFA4 ARNU183CFU4 ARNU243CFU4 W H D 52-15/ / /16 7-1/2 22 FLOOR STANDING

23 Floor Standing FLOOR STANDING Electrical Wiring Diagram CEA and CFA Cased, CEU and CFU Uncased Units Figure 4: ARNU73~153CEA4, ARNU CFA4, ARNU73~153CEU4, ARNU CFU4 Wiring Diagram. FLOOR STANDING 23

24 FLOOR STANDING Electrical Wiring Diagram CEA and CFA Cased, CEU and CFU Uncased Units Table 14: CEA and CFA Cased, CEU and CFU Uncased Indoor Unit Wiring Diagram Legend. MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Terminal 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-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-CC Dry contact Dry Contact connection CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-LEAK Refrigerant leak detector Refrigerant leak detector connection CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-REMO Wired remote controller Wired remote control connection CN-ROOM Room sensor Room air thermistor CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Table 15: CEA and CFA Cased, CEU and CFU Uncased Indoor Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit SW4 DRY CONTACT MODE Variable Auto SW5 CONTINUOUS FAN Off On Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode Selects continuous fan for floor standing indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when the system is off, or the outdoor unit is in defrost mode (when the oudoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off *For Gen 4 Multi V floor standing indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models. 24 FLOOR STANDING

25 FLOOR STANDING Refrigerant Flow Diagram CEA and CFA Cased, CEU and CFU Uncased Units Figure 5: CEA and CFA Cased, CEU and CFU Uncased Indoor Unit Refrigerant Flow Diagram. Heat Exchanger EEV Filter Cooling Heating TH3 Sirocco Fan TH2 Filter TH1 lndoor unit Table 16: CEA and CFA Cased, CEU and CFU Uncased Indoor Unit Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Vapor (inch) CEA / CFA (Cased) Units ARNU73CEA4 ARNU93CEA4 ARNU123CEA4 1/4 Flare 1/2 Flare ARNU153CEA4 ARNU183CFA4 ARNU243CFA4 3/8 Flare 5/8 Flare CEU / CFU (Uncased) Units ARNU73CEU4 ARNU93CEU4 ARNU123CEU4 1/4 Flare 1/2 Flare ARNU153CEU4 ARNU183CFU4 ARNU243CFU4 3/8 Flare 5/8 Flare Floor Standing Table 17: CEA and CFA Cased, CEU and CFU Uncased Indoor Unit Thermistors. Thermistor Description TH1 Return air thermistor TH2 Pipe in thermistor TH3 Pipe out thermistor FLOOR STANDING 25

26 FLOOR STANDING Acoustic Data Sound Pressure Levels MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Figure 6: Sound Pressure Measurement Location. 4.9ft Table 18: Floor Standing Sound Indoor Unit Pressure Levels. Model Sound Pressure Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed CEA, CFA (Cased) Units ARNU73CEA ARNU93CEA ARNU123CEA ARNU153CEA ARNU183CFA ARNU243CFA CEU, CFU (Uncased) Units ARNU73CEU ARNU93CEU ARNU123CEU ARNU153CEU ARNU183CFU ARNU243CFU Figure 7: ARNU73CEA4 / CEU4, ARNU93CEA4 / CEU4, and ARNU123CEA4 / CEU4 Sound Pressure Level Diagrams. ARNU73CEA4 / ARNU73CEU4 Microphone 4.9ft Measurements are taken 4.9 ft away from the front of the unit. Sound pressure levels are measured in db(a) with a tolerance of ±3. Sound pressure levels are tested in an anechoic chamber under ISO Standard Operating Conditions: Power source: 22V/6 Hz Sound level will vary depending on a range of factors including the construction (acoustic absorption coefficient) of a particular room in which the unit was installed. ARNU93CEA4 / ARNU93CEU4 ARNU123CEA4 / ARNU123CEU4 26 FLOOR STANDING

27 FLOOR STANDING Acoustic Data Sound Pressure Levels / Sound Power Levels Figure 8: ARNU153CEA4 / CEU4, ARNU183CFA4 / CFU4, and ARNU243CFA4 / CFU4 Sound Pressure Level Diagrams. ARNU153CEA4 / ARNU183CFA4 / ARNU243CFA4 / ARNU153CEU4 ARNU183CFU4 ARNU243CFU4 Sound Power Levels Table 19: Floor Standing Indoor Unit Sound Power Levels. Model Sound Power Levels db(a) CEA / CFA (Cased) Units ARNU73CEA4 54 ARNU93CEA4 55 ARNU123CEA4 57 ARNU153CEA4 59 ARNU183CFA4 6 ARNU243CFA4 61 CEU / CFU (Uncased) Units ARNU73CEU4 54 ARNU93CEU4 55 ARNU123CEU4 57 ARNU153CEU4 59 ARNU183CFU4 6 ARNU243CFU4 61 Data is valid under diffuse field conditions. Data is valid under nominal operating conditions. Sound power level is measured using rated conditions, and tested in a reverberation room per ISO 3741 standards. Sound level will vary depending on a range of factors such as construction (acoustic absorption coefficient) of particular area in which the equipment is installed. Reference acoustic intensity: db = 1E-6μW/m 2 Floor Standing FLOOR STANDING 27

28 FLOOR STANDING Acoustic Data Sound Power Levels Figure 9: ARNU73CEA4 / CEU4, ARNU93CEA4 / CEU4, and ARNU123CEA4 / CEU4 Sound Power Level Diagrams. ARNU73CEA4 / ARNU73CEU4 ARNU93CEA4 / ARNU93CEU4 ARNU123CEA4 / ARNU123CEU4 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Figure 1: ARNU153CEA4 / CEU4, ARNU183CFA4 / CFU4, and ARNU243CFA4 / CFU4 Sound Pressure Level Diagrams. ARNU153CEA4 / ARNU153CEU4 ARNU183CFA4 / ARNU183CFU4 ARNU243CFA4 / ARNU243CFU4 28 FLOOR STANDING

29 FLOOR STANDING Air Velocity / Temperature Distribution ARNU73CEA4 / CEU4, ARNU93CEA4 / CEU4 Figure 11: ARNU73CEA4 / ARNU73CEU4. Cooling Discharge angle: 45 Heating Discharge angle: 6 Air velocity ft/s Air velocity ft/s ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Temperature ( F) Temperature ( F) 26 ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Figure 12: ARNU93CEA4 / ARNU93CEU4. Cooling Discharge angle: ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Heating Discharge angle: Floor Standing Air velocity ft/s Air velocity ft/s ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft 26 Temperature ( F) Temperature ( F) ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft 26 ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft 1.5 FLOOR STANDING 29

30 1 8 FLOOR STANDING Air Velocity / Temperature Distribution ARNU123CEA4 / CEU4, ARNU153CEA4 / CEU4 Figure 13: ARNU123CEA4 / ARNU123CEU4. Cooling Discharge angle: 45 Heating Discharge angle: 6 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual 22 Air velocity ft/s Temperature ( F) ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Figure 14: ARNU153CEA4 / ARNU153CEU4. Cooling Discharge angle: 45 Air velocity ft/s 26 ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Air velocity ft/s ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Temperature ( F) 26 ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Heating Discharge angle: 6 Air velocity ft/s ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Temperature ( F) Temperature ( F) ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft.5 3 FLOOR STANDING

31 FLOOR STANDING Air Velocity / Temperature Distribution ARNU183CFA4 / CFU4, ARNU243CFA4 / CFU4 Figure 15: ARNU183CFA4 / ARNU183CFU4. Cooling Discharge angle: 45 Heating Discharge angle: 6 Air velocity ft/s Air velocity ft/s ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft 26 ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Temperature ( F) Temperature( F) 26 ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Figure 16: ARNU243CFA4 / ARNU243CFU4. Cooling Discharge angle: ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft Heating Discharge angle: Floor Standing Air velocity ft/s Air velocity ft/s ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft 3 26 ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft 3 Temperature ( F) Temperature ( F) ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft 26 ft 23 ft 19.7 ft 16.4 ft 13.1 ft 9.8 ft 2. 4 FLOOR STANDING 31

32 FLOOR STANDING Cooling Capacity Tables ARNU73CEA4 / CEU4, ARNU93CEA4 / CEU4, ARNU123CEA4 / CEU4 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 2: ARNU73CEA4 / ARNU73CEU4, ARNU93CEA4 / ARNU93CEU, ARNU123CEA4 / ARNU123CEU4 Cooling Capacity Table. Model No. / Capacity Index ARNU73CEA4 - ARNU73CEU4 / 7.5 ARNU93CEA4 - ARNU93CEU4 / 9.6 ARNU123CEA4 - ARNU123CEU / 12.3 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / 64 8 / / 7 88 / / 76 TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh TC: Total Capacity (MBh); SHC: Sensible Heat Capacity (MBh). 32 FLOOR STANDING

33 FLOOR STANDING Cooling Capacity Tables ARNU153CEA4 / CEU4, ARNU183CFA4 / CFU4, ARNU243CFA4 / CFU4 Table 21: ARNU153CEA4 / ARNU153CEU4, ARNU183CFA4 / ARNU183CFU4, ARNU243CFA4 / ARNU243CFU4 Cooling Capacity Table. Model No. / Outdoor Indoor Air Temperature ( F DB / WB) 68 / / / 64 8 / / 7 88 / / 76 Capacity Index Air Temp. TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC ( F DB) MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh ARNU153CEA4 - ARNU153CEU4 / 15.4 ARNU183CFA4 - ARNU183CFU4 / 19.1 ARNU243CFA4 - ARNU243CFU4 / TC: Total Capacity (MBh); SHC: Sensible Heat Capacity (MBh). Floor Standing FLOOR STANDING 33

34 FLOOR STANDING Heating Capacity Tables ARNU73CEA4 / CEU4, ARNU93CEA4 / CEU4, ARNU123CEA4 / CEU4 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 22: ARNU73CEA4 / ARNU73CEU4, ARNU93CEA4 / ARNU93CEU4, ARNU123CEA4 / ARNU123CEU4 Heating Capacity Table. Model No. / Outdoor Air Temp. Indoor Air Temperature ( F DB) Capacity Index F DB F WB TC TC TC TC TC TC TC TC MBh MBh MBh MBh MBh MBh MBh MBh ARNU73CEA4 - ARNU73CEU4 / 7.5 ARNU93CEA4 - ARNU93CEU4 / 9.6 ARNU123CEA4 - ARNU123CEU / 12.3 TC: Total Capacity (MBh) FLOOR STANDING

35 FLOOR STANDING Heating Capacity Tables ARNU153CEA4 / CEU4, ARNU183CFA4 / CFU4, ARNU243CFA4 / CFU4 Table 23: ARNU153CEA4 / ARNU153CEU4, ARNU183CFA4 / ARNU183CFU4, ARNU243CFA4 / ARNU243CFU4 Heating Capacity Table. Outdoor Air Temp. Indoor Air Temperature ( F DB) Capacity Index F DB F WB TC TC TC TC TC TC TC TC MBh MBh MBh MBh MBh MBh MBh MBh ARNU153CEA4 - ARNU153CEU4 / 15.4 ARNU183CFA4 - ARNU183CFU4 / 19.1 ARNU243CFA4 - ARNU243CFU4 / 24.2 TC: Total Capacity (MBh) Floor Standing FLOOR STANDING 35

36 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual 36 FLOOR STANDING

37 CEILING SUSPENDED Mechanical Specifications on page 38 General Data on page 39 Electrical Data on page 39 External Dimensions on page 4 Electrical Wiring Diagram on page 41 Refrigerant Flow Diagram on page 43 Acoustic Data on page 44 Air Velocity / Temperature Distribution on page 45 Capacity Tables on page 46

38 CEILING SUSPENDED Mechanical Specifications MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Casing The case is designed to mount against the ceiling surface in a horizontal supply air configuration. The return air is from the bottom and supply air is from a single slot on the front of the unit. The unit is manufactured using a coated metal frame covered with an off-white ABS architectural polymeric resin exterior case. Cold surfaces are covered with a coated polystyrene insulating material. Fan Assembly and Control The unit has a single, direct driven, Sirocco fan made of high strength ABS HR-247 polymeric resin. The fan motor is a Brushless Digitally-Controlled (BLDC) design with permanently lubricated and sealed ball bearings. The fan/motor assembly is mounted on vibration attenuating rubber grommets. The fan speed is controlled using a microprocessor-based direct digital control algorithm that provides a minimum of three pre-programmed fan speeds in the Heating and Fan Only modes and four speeds in the Cooling mode. Fan settings are high, medium, and low. The fourth speed in the Cooling mode is a super high setting that runs for 3 minutes at high fan speed. A chaos wind setting provides random change in fan speed. The fan speed algorithm provides a field selectable fixed or auto-speed setting that changes fan speed based on the difference between controller set-point and space temperature. Air Filter Return air is filtered with a removable, washable filter. Access to the filter media is through a hinged, spring clip (screwless) return air grille located on the bottom of the unit. Airflow Guide Vanes The supply air opening has a single directional slot diffuser with an oscillating motorized guide vane designed to change the angle airflow is supplied. The supply air range of motion is 4 in an up / down direction with the capability of locking the valve in a fixed position. Manually adjustable guide vanes are provided to set the airflow supply air direction from side-to-side. Microprocessor Controls The unit is provided with an integrated microprocessor-based controller. The controller is capable of performing functions necessary to operate the system without the use of a wall-mounted controller. A temperature thermistor is factory-mounted in the return air stream. All unit operation parameters, excluding the operating schedule, are stored in non-volatile memory resident on the unit microprocessor. Operating schedules are stored in select models of the optional, wall-mounted, local or central controller. The field-supplied communication cable between the indoor unit(s) and outdoor unit is to be a minimum of 18 AWG, 2 conductor, stranded, and shielded cable (RS-485), terminated via screw terminals on the control boards. The microprocessor control provides the following functions: self-diagnostics, auto restart following power restoration, test run, and will operate the indoor unit using one of five operating modes: 1. Auto Changeover (Heat Recovery only) 2. Heating 3. Cooling 4. Dry 5. Fan Only 38 CEILING SUSPENDED For Heat Recovery systems the Auto Changeover setting automatically switches between cooling and heating modes based on room temperature conditions. For Heat Pump systems, heated or cooled air delivery is dependent upon outdoor unit operating mode. In Heating mode, the microprocessor control will activate the indoor unit when indoor room temperature falls below setpoint temperature and signals the outdoor unit to begin the heating cycle. The indoor unit fan operation is delayed until coil pipe temperature reaches 76ºF. Significant airflow is generated when pipe temperature reaches 8 F. The unit is equipped with an infrared receiver designed to communicate with an LG hand-held remote controller. Pluggable connection sockets on the microprocessor circuit board accommodate various models of wall-mounted local controllers and/or a wall-mounted remote temperature sensor. The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either: 1. Wall-mounted wired controller(s) 2. Factory mounted return air thermistor or the optional wallmounted wired remote temperature sensor A single indoor unit has the capability of being controlled by up to two local wired controllers. The microprocessor controls space temperature using the value provided by the temperature sensor sensing a space temperature that is farthest away from the temperature set-point. The microprocessor control provides a Cooling mode test cycle that operates the unit in full Cooling mode for 18 minutes without regard to space temperature. If the system is provided with an optional wall-mounted or central controller, displayed diagnostic codes are specific, alpha numeric, and provide the service technician with a reason for the code displayed. Handling Condensate The unit is designed for gravity draining of condensate. LG provides a factory insulated flexible drain hose. If condensate lift/pumps are needed for the application, they are to be field-provided. Controls Features Auto changeover (Heat Recovery only) Auto operation Auto restart Child lock Dual thermistor control Forced Operation Group control High ceiling Hot start Self diagnostics Sleep mode Timer (on / off) Weekly schedule Soft dry (dehumidification) Auto direction/swing (up / down) Manual control direction (left / right) Fan speed control Chaos wind (random fan speed) Jet cool (fast cooling)

39 CEILING SUSPENDED General Data / Electrical Data Table 24: Ceiling Suspended Indoor Unit General Data. Type Cooling Mode Performance ARNU183VJA2 Ceiling Suspended ARNU243VJA2 Capacity (Btu/h) 19,1 24,2 Power Input 1 (W) Heating Mode Performance Capacity (Btu/h) 21,5 27,3 Power Input 1 (W) Entering Mixed Air Cooling Max ( F WB) Heating Min ( F DB) Unit Data Refrigerant Type 2 R41A R41A Refrigerant Control EEV EEV Sound Pressure 3 db(a) (H/M/L) 42 / 4 / / 41 / 39 Net Unit Weight (lbs) Shipping Weight (lbs) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 Fan Type Sirocco Sirocco Quantity 1 1 Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) 565 / 495 / / 565 / 495 Piping Liquid Line (in., O.D.) 1/4 Flare 3/8 Flare Vapor Line (in., O.D.) 1/2 Flare 5/8 Flare Condensate Line (in., I.D.) 5/8 5/8 EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national codes. This unit comes with a dry nitrogen charge. This data is rated ft above sea level, with 25 ft of refrigerant line per indoor unit and a ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-15%. Cooling capacity rating obtained with air entering the indoor coil at 8ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB). Heating capacity rating obtained with air entering the indoor unit at 7ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 1 Power Input is rated at high speed. 2 Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy R41A refrigerant according to applicable regulations (4 CFR Part 82, Subpart F) under section 68 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. Ceiling Suspended Table 25: Ceiling Suspended Indoor Unit Electrical Data. Power Supply Power Input (W) Model Voltage Range MCA MOP Rated Amps (A) Hz Volts Phase Cooling Heating ARNU183VJA V 1 ARNU243VJA MCA : Minimum Circuit Ampacity. MOP : Maximum Overcurrent Protection. Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits. Select wire size based on the larger MCA value. Instead of fuse, use the circuit breaker. CEILING SUSPENDED 39

40 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual CEILING SUSPENDED External Dimensions Figure 17: ARNU183VJA2 and ARNU243VJA2 Dimensions. 4 CEILING SUSPENDED

41 CEILING SUSPENDED Electrical Wiring Diagram Figure 18: ARNU183VJA2 and ARNU243VJA2 Wiring Diagram. Ceiling Suspended CN-FLOAT* *Float switch is field supplied. CN-FLOAT has factory installed jumper. CEILING SUSPENDED 41

42 CEILING SUSPENDED Electrical Wiring Diagram MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 26: Ceiling Suspended Indoor Unit Wiring Diagram Legend. Terminal 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-FLOAT Float switch input Float switch sensing CN-VANE1 Step motor Step motor output CN-VANE2 Step motor Step motor output CN-EEV EEV Output EEV control output CN-DOOR Door lock switch Door lock switch line CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-CC Dry contact Dry Contact connection CN-REMO Wired remote controller Wired remote control connection CN-ROOM Room sensor Room air thermistor CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-COM Communication Communication between indoor and outdoor Table 27: Ceiling Suspended Indoor Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit SW4 DRY CONTACT MODE Variable Auto Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode *For Gen 4 Multi V ceiling suspended indoor units, DIP switches 1, 2, 5 through 8 must be set to OFF. These DIP switches are used for other models. 42 CEILING SUSPENDED

43 CEILING SUSPENDED Refrigerant Flow Diagram Figure 19: Ceiling Suspended Indoor Unit Refrigerant Flow Diagram. Heat Exchanger EEV Filter Cooling Heating TH3 TH2 Sirocco Fan Filter TH1 lndoor unit Table 28: Ceiling Suspended Indoor Unit Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Gas (inch) ARNU183VJA2 1/4 1/2 ARNU243VJA2 3/8 5/8 Ceiling Suspended Table 29: Ceiling Suspended Indoor Unit Thermistors. Thermistor Description TH1 Return air thermistor TH2 Pipe in thermistor TH3 Pipe out thermistor CEILING SUSPENDED 43

44 CEILING SUSPENDED Acoustic Data Sound Pressure Levels MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Figure 2: Sound Pressure Measurement Location. Table 3: Ceiling Suspended Indoor Unit Sound Pressure Levels Octave Band Sound Pressure Level (db re 2µPa ) Microphone Model Sound Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed ARNU183VJA ARNU243VJA Approximate Hearing Threshold.. Figure 21: ARNU183VJA2 and ARNU243VJA2 Sound Pressure Level Diagrams. ARNU183VJA2 ARNU243VJA Octave Band Center Frequency (Hz) NC-65 NC-6 NC-55 NC-5 NC-45 NC-4 NC-35 NC-3 NC-25 NC-2 NC-15 Octave Band Sound Pressure Level (db re 2µPa ) Approximate Hearing Threshold Octave Band Center Frequency (Hz) Measurements are taken away from the front of the unit. Sound pressure levels are measured in db(a) with a tolerance of ±3. Sound pressure levels are tested in an anechoic chamber under ISO Standard Operating Conditions: Power source: 22V/6 Hz Sound level will vary depending on a range of factors including the construction (acoustic absorption coefficient) of a particular room in which the unit was installed. NC-65 NC-6 NC-55 NC-5 NC-45 NC-4 NC-35 NC-3 NC-25 NC-2 NC CEILING SUSPENDED

45 64.4 CEILING SUSPENDED Air Velocity / Temperature Distribution ARNU183VJA2 / ARNU243VJA2 Figure 22: ARNU183VJA2. Cooling Discharge angle: 5 Discharge angle: 6 Heating Air velocity ft/s Air velocity ft/s ft 13.1 ft 9.8 ft ft 13.1 ft 9.8 ft 1.5 Temperature ( F) Figure 23: ARNU243VJA ft 13.1 ft 9.8 ft Temperature [ F] ft 13.1 ft 9.8 ft Ceiling Suspended Discharge angle: 5 Cooling Discharge angle: 6 Heating Air velocity ft/s Air velocity ft/s ft 13.1 ft 9.8 ft ft 13.1 ft 9.8 ft Temperature ( F) Temperature ( F) ft 13.1 ft 9.8 ft ft 13.1 ft 9.8 ft CEILING SUSPENDED 45

46 CEILING SUSPENDED Cooling Capacity Tables ARNU183VJA2, ARNU243VJA2 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 31: ARNU183VJA2 and ARNU243VJA2 Cooling Capacity Table. Model No. / Capacity Index ARNU183VJA2 / 19.2 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / 64 8 / / 7 88 / / 76 TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh ARNU243VJA2 / TC: Total Capacity (MBh); SHC: Sensible Heat Capacity (MBh). 46 CEILING SUSPENDED

47 CEILING SUSPENDED Heating Capacity Tables ARNU183VJA2, ARNU243VJA2 Table 32: ARNU183VJA2 and ARNU243VJA2 Heating Capacity Table. Model No. / Outdoor Air Temp Indoor Air Temperature ( F DB) Capacity Index F DB F WB TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh ARNU183VJA2 / ARNU243VJA2 / 24.2 TC: Total Capacity (MBh) Ceiling Suspended CEILING SUSPENDED 47

48 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual 48 CEILING SUSPENDED

49 CONVERTIBLE SURFACE MOUNTED Mechanical Specifications on page 5 General Data on page 51 Electrical Data on page 51 External Dimensions on page 52 Electrical Wiring Diagram on page 53 Refrigerant Flow Diagrams on page 55 Acoustic Data on page 56 Air Velocity / Temperature Distribution on page 57 Capacity Tables on page 59

50 CONVERTIBLE SURFACE MOUNTED Mechanical Specifications MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Casing The case is designed to mount against the ceiling surface in a horizontal discharge configuration or on a wall in a vertical discharge configuration. When mounted against the ceiling surface, the return air is from the bottom of the unit. When mounted on a wall, the return air is from the front surface of the unit. The unit is manufactured using a coated metal frame covered with an off-white ABS architectural polymeric resin exterior case. Cold surfaces are covered with a coated polystyrene insulating material. Fan Assembly and Control The unit has a single, direct driven, Sirocco fan made of high strength ABS HR-247 polymeric resin. The fan motor is a Brushless Digitally-Controlled (BLDC) design with permanently lubricated and sealed ball bearings. The fan/motor assembly is mounted on vibration attenuating rubber grommets. The fan speed is controlled using a microprocessor-based direct digital control algorithm that provides a minimum of three pre-programmed fan speeds in the Heating and Fan Only modes and four speeds in the Cooling mode. Fan settings are high, medium, and low. The fourth speed in the Cooling mode is a super high setting that runs for 3 minutes at high fan speed. A chaos wind setting provides random change in fan speed. The fan speed algorithm provides a field-selectable fixed or auto-speed setting that changes fan speed based on the difference between controller set-point and space temperature. Air Filter Return air is filtered with a removable, washable filter. Access to the filter media is through a hinged, spring clip (screwless) return air grille located on the front/bottom of the unit. Airflow Guide Vanes The discharge opening has a single directional slot diffuser with an oscillating motorized guide vane designed to change the angle airflow is discharged. The discharge range of motion is 4 in an up/down direction with the capability of locking the vane in a fixed position. Manually adjustable guide vanes are provided to set the airflow discharge direction from side-to-side. Microprocessor Controls The unit is provided with an integrated microprocessor-based controller. The controller is capable of performing functions necessary to operate the system without the use of a wall-mounted controller. A temperature thermistor is factory-mounted in the return air stream. All unit operation parameters, excluding the operating schedule, are stored in non-volatile memory resident on the unit microprocessor. Operating schedules are stored in select models of the optional, wall-mounted, local or central controller. The field-supplied communication cable between the indoor unit(s) and outdoor unit is to be a minimum of 18 AWG, 2 conductor, stranded and shielded cable (RS-485), terminated via screw terminals on the control boards. The microprocessor control provides the following functions: self-diagnostics, auto restart following power restoration, test run, and will operate the indoor unit using one of five operating modes: 1. Auto Changeover (Heat Recovery only) 2. Heating 3. Cooling 4. Dry 5. Fan Only 5 CONVERTIBLE For Heat Recovery systems the Auto Changeover setting automatically switches between cooling and heating modes based on room temperature conditions. For Heat Pump systems, heated or cooled air delivery is dependent upon outdoor unit operating mode. In Heating mode, the microprocessor control will activate the indoor unit when indoor room temperature falls below setpoint temperature and signals the outdoor unit to begin heating cycle. The indoor unit fan operation is delayed until coil pipe temperature reaches 76ºF. Significant airflow is generated when pipe temperature reaches 8 F. The unit is equipped with an infrared receiver designed to communicate with an LG hand-held remote controller. In lieu of factory return air thermistor, pluggable connection sockets on the microprocessor circuit board accommodate various models of wall-mounted local controllers and/or a wall-mounted remote temperature sensor. The unit microprocessor is capable of accepting space temperature readings concurrently or individually from either: 1. Wall-mounted wired controller(s) 2. Factory mounted return air thermistor or the optional wallmounted wired remote temperature sensor A single indoor unit has the capability of being controlled by up to two local wired controllers. The microprocessor controls space temperature using the value provided by the temperature sensor sensing a space temperature that is farthest away from the temperature set-point. The microprocessor control provides a Cooling mode test cycle that operates the unit for 18 minutes without regard to space temperature. If the system is provided with an optional wall-mounted or central controller, displayed diagnostic codes are specific, alphanumeric, and provide the service technician with a reason for the code displayed. Handling Condensate The unit is designed for gravity draining of condensate. LG provides a factory insulated flexible drain hose. If condensate lift/ pumps are needed for the application, they are to be field-provided. Controls Features Auto changeover (Heat Recovery only) Auto operation Auto restart Child lock Dual thermistor control External static pressure control Hot start Self diagnostics Timer (on / off) Weekly schedule Soft dry (dehumidification)

51 CONVERTIBLE SURFACE MOUNTED General Data / Electrical Data Table 33: Convertible Surface Mounted Indoor Unit General Data. Type Cooling Mode Performance ARNU93VEA2 Convertible Surface Mounted ARNU123VEA2 Capacity (Btu/h) 9,6 12,3 Power Input 1 (W) 3 3 Heating Mode Performance Capacity (Btu/h) 1,9 13,6 Power Input 1 (W) 3 3 Entering Mixed Air Cooling Max ( F WB) Heating Min ( F DB) Unit Data Refrigerant Type 2 R41A R41A Refrigerant Control EEV EEV Sound Pressure 3 db(a) (H/M/L) 36 / 32 / / 36 / 3 Net Unit Weight (lbs) Shipping Weight (lbs) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 Fan Type Cross Flow Cross Flow Quantity 1 1 Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) 268 / 243 / / 268 / 244 Piping Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare Condensate Line (in., I.D.) 5/8 5/8 EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national codes. This unit comes with a dry nitrogen charge. This data is rated ft above sea level, with 25 ft of refrigerant line per indoor unit and a ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between 95-15%. Cooling capacity rating obtained with air entering the indoor coil at 8ºF dry bulb (DB) and 67ºF wet bulb (WB) and outdoor ambient conditions of 95ºF dry bulb (DB). Heating capacity rating obtained with air entering the indoor unit at 7ºF dry bulb (DB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 1 Power Input is rated at high speed. 2 Take appropriate actions at the end of HVAC equipment life to recover, recycle, reclaim or destroy R41A refrigerant according to applicable regulations (4 CFR Part 82, Subpart F) under section 68 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. Convertible Surface Mounted Table 34: Convertible Surface Mounted Indoor Unit Electrical Data. Power Supply Power Input (W) Model Voltage Range MCA MOP Rated Amps (A) Hz Volts Phase Cooling Heating ARNU93VEA V 1 ARNU123VEA MCA : Minimum Circuit Ampacity. MOP : Maximum Overcurrent Protection. Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits. Select wire size based on the larger MCA value. Instead of fuse, use the circuit breaker. CONVERTIBLE 51

52 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual CONVERTIBLE SURFACE MOUNTED External Dimensions Figure 24: ARNU93VEA2 and ARNU123VEA2 Dimensions. 52 CONVERTIBLE

53 Convertible Surface Mounted CONVERTIBLE SURFACE MOUNTED Electrical Wiring Diagram Figure 25: ARNU93VEA2 and ARNU123VEA2 Wiring Diagram. CONVERTIBLE 53

54 CONVERTIBLE SURFACE MOUNTED Electrical Wiring Diagram MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 35: Convertible Surface Mounted Indoor Unit Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR Fan motor output Motor output of BLDC CN-VANE1 Step motor Step motor output CN-VANE2 Step motor Step motor output CN-EEV EEV Output EEV control output CN-DOOR Door lock switch Door lock switch line CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-CC Dry contact Dry Contact connection CN-REMO Wired remote controller Wired remote control connection CN-ROOM Room sensor Room air thermistor CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-COM Communication Communication between indoor and outdoor Table 36: Convertible Surface Mounted Indoor Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit SW4 DRY CONTACT MODE Variable Auto Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode *For Gen 4 Multi V convertible surface indoor units, DIP switches 1, 2, 5 through 8 must be set to OFF. These DIP switches are used for other models. 54 CONVERTIBLE

55 CONVERTIBLE SURFACE MOUNTED Refrigerant Flow Diagram Figure 26: Convertible Surface Mounted Indoor Unit Refrigerant Flow Diagram. Heat Exchanger EEV Filter Cooling Heating TH3 TH2 C.F.F. Filter TH1 lndoor unit Table 37: Convertible Surface Mounted Indoor Unit Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Gas (inch) ARNU93VEA2 1/4 1/2 ARNU123VEA2 1/4 1/2 Table 38: Convertible Surface Mounted Indoor Unit Thermistors. Thermistor Description TH1 Return air thermistor TH2 Pipe in thermistor TH3 Pipe out thermistor Convertible Surface Mounted CONVERTIBLE 55

56 CONVERTIBLE SURFACE MOUNTED Acoustic Data Sound Pressure Levels MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Figure 27: Sound Pressure Measurement Location. Table 39: Convertible Surface Mounted Indoor Unit Sound Pressure Levels. Model Sound Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed ARNU93VEA ARNU123VEA Figure 28: ARNU93VEA2 and ARNU123VEA2 Sound Pressure Level Diagrams. ARNU93VEA2 ARNU123VEA2 Octave Band Sound Pressure Level (db re 2µPa ) Microphone Approximate Hearing Threshold Octave Band Center Frequency (Hz) NC-65 NC-6 NC-55 NC-5 NC-45 NC-4 NC-35 NC-3 NC-25 NC-2 NC-15 Octave Band Sound Pressure Level (db re 2µPa ) Approximate Hearing Threshold Octave Band Center Frequency (Hz) Measurements are taken feet away from the front of the unit. Sound pressure levels are measured in db(a) with a tolerance of ±3. Sound pressure levels are tested in an anechoic chamber under ISO Standard Operating Conditions: Power source: 22V/6 Hz Sound level will vary depending on a range of factors including the construction (acoustic absorption coefficient) of a particular room in which the unit was installed. NC-65 NC-6 NC-55 NC-5 NC-45 NC-4 NC-35 NC-3 NC-25 NC-2 NC CONVERTIBLE

57 CONVERTIBLE SURFACE MOUNTED Air Velocity / Temperature Distribution ARNU93VEA2 Figure 29: ARNU93VEA2. Ceiling Discharge angle:5 Cooling Discharge angle: 6 Heating Air velocity ft/s Air velocity ft/s ft 13.1 ft 9.8 ft Temperature ( C) ft 13.1 ft 9.8 ft Floor Cooling Discharge angle: ft 13.1 ft 9.8 ft Temperature ( C) ft 13.1 ft 9.8 ft Discharge angle: Heating Convertible Surface Mounted Air velocity ft/s Air velocity ft/s ft 13.1 ft 9.8 ft ft 13.1 ft 9.8 ft Temperature ( F) Temperature ( F) ft 13.1 ft 9.8 ft ft 13.1 ft 9.8 ft CONVERTIBLE 57

58 CONVERTIBLE SURFACE MOUNTED Air Velocity / Temperature Distribution ARNU123VEA2 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Figure 3: ARNU123VEA2. Ceiling Discharge angle: 5 Air velocity ft/s 1.6 Temperature ( F) 62.6 Air velocity ft/s Cooling ft 13.1 ft 9.8 ft Floor ft 13.1 ft 9.8 ft Discharge angle: 5 Cooling 16.4 ft 13.1 ft 9.8 ft Discharge angle: 6 Air velocity ft/s Heating Discharge angle: 6 Air velocity ft/s ft 13.1 ft 9.8 ft Temperature ( F) ft 13.1 ft 9.8 ft Heating ft 13.1 ft 9.8 ft Temperature ( F) Temperature ( F) ft 13.1 ft 9.8 ft ft 13.1 ft 9.8 ft CONVERTIBLE

59 CONVERTIBLE SURFACE MOUNTED Cooling Capacity Tables ARNU93VEA2, ARNU123VEA2 Table 4: ARNU93VEA2 and ARNU123VEA2 Cooling Capacity Table. Model No. / Capacity Index ARNU93VEA2 / 9.6 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / 64 8 / / 7 88 / / 76 TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC TC SHC MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh MBh ARNU123VEA2 / TC: Total Capacity (MBh); SHC: Sensible Heat Capacity (MBh). Convertible Surface Mounted CONVERTIBLE 59

60 CONVERTIBLE SURFACE MOUNTED Heating Capacity Tables ARNU93VEA2, ARNU123VEA2 MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Table 41: ARNU93VEA2 and ARNU123VEA2 Heating Capacity Table. Model No. / Outdoor Air Temp Indoor Air Temperature ( F DB) Capacity Index F DB F WB TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh ARNU93VEA2 / ARNU123VEA2 / 12.3 TC: Total Capacity (MBh) CONVERTIBLE

61 APPLICATION GUIDELINES Selecting the Best Location on page 62 General Mounting - Floor Standing Indoor Units on page 63 General Ceiling Mounting - Ceiling Suspended and Convertible Surface on page 64 General Wall Mounting - Convertible Surface Indoor Units on page 65 General Drain Piping Information on page 65 Wiring Guidelines on page 67 Wired Remote Controller Location on page 68 Acronyms on page 69

62 APPLICATION GUIDELINES Selecting the Best Location MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Selecting the Best Location General Do s Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily and to minimize the length of the condensate drain piping. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient supply air and maintenance space. Locate the indoor unit in a location where it can be easily connected to the outdoor unit / heat recovery unit. Specific Floor Standing Indoor Unit Do s Place the unit in a location that can easily bear a load exceeding four times the weight of the floor standing unit. Place the unit where it will be level. Specific Ceiling Suspended Indoor Unit Do s Ensure that the clearance between the wall(s) and the ceiling suspended indoor unit is more than 27-9/16 inches. Specific Convertible Surface Indoor Unit Do s Ensure that the clearance between the wall and the unit is more than 7-7/8 inches. Install the unit as low as possible on the wall, allowing a minimum of 1-15/16 inches from the floor. General Don ts Avoid installing the unit near high-frequency generators. Do not install the unit near a doorway. The unit should not be installed near a heat or steam source, or where considerable amounts of oil, iron powder, or flour are used. (These materials may generate condensate, cause a reduction in heat exchanger efficiency, or the drain to malfunction. If this is a potential problem, install a ventilation fan large enough to vent out these materials.) The unit should not be installed where sulfuric acid and flammable or corrosive gases are generated, vented into, or stored. There is risk of fire, explosion, and physical injury or death. The unit may be damaged, may malfunction, and / or will not operate as designed if installed in any of the conditions listed. If the unit is installed near a body of water, the installation parts are at risk of being corroded. Appropriate anti-corrosion methods should be taken for the unit and all installation parts. Figure 31: Selecting the Best Location / Minimum Clearance Requirements Floor Standing Indoor Units. Cased 3/4 or more 5-7/8 or more Uncased 25-3/4 2-3/16 or more Front 39-3/8 or more A B 3-15/16 or more Maintenance area Window Supply air direction Return air direction Window Base 6-7/8 or more Installing in an Area Exposed to Unconditioned Air In some installation applications, areas (floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an unheated garage or storeroom). To countermeasure: Verify that carpet is or will be installed (carpet may increase the temperature by three [3] degrees). Add insulation between the floor joists. Install radiant heat or another type of heating system to the floor. 62 GUIDELINES Table 42: Floor Standing Minimum Maintenance Requirements. Indoor Unit A (Inch) B (Inch) Floor Standing Cased and Uncased CEA / CEU Frames /2 Floor Standing Cased and Uncased CFA / CFU Frames /2

63 APPLICATION GUIDELINES Selecting the Best Location / General Mounting - Floor Standing Figure 32: Selecting the Best Location / Minimum Clearance Requirements Ceiling Suspended Indoor Units. More than 27-9/16 inches Figure 33: Selecting the Best Location / Minimum Clearance Requirements Convertible Surface Indoor Units. Ceiling Mounting Installation More than 7-7/8 inches More than 7-7/8 inches More than 2 inches More than 27-9/16 inches More than 11-13/16 inches Wall Mounting Installation More than 7-7/8 inches General Mounting - Floor Standing Indoor Units 1. To provide stabilization, floor standing indoor units need to be secured to a wall. Ensure the wall is strong enough to bear the weight of the unit. If necessary, reinforce the wall before installing the unit. 2. Mark the appropriate location on the wall for the holes, then drill the holes. More than 2 inches Figure 34: Bolt Pitch for Floor Standing Indoor Units. A More than 7-7/8 inches Application Guidelines Table 43: Location of the Wall Bolts for Floor Standing Indoor Units. Type A (Inch) Floor Standing Cased and Uncased CEA / CEU Frames 33-3/4 Floor Standing Cased and Uncased CFA / CFU Frames 44-3/4 3. Apply the installation mount and install the Floor Standing indoor unit. 7-13/16 7-5/8 Unit: Inch The unit requires a minimum clearance of 3-15/16 below the unit for air intake. Verify that the floor standing indoor unit is level so that drainage flows smoothly. If there is an incline, water may leak. Depending on the shape and type of the wall surface, the indoor unit operating sound may be louder. GUIDELINES 63

64 APPLICATION GUIDELINES General Mounting - Ceiling Suspended and Convertible Surface MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual General Ceiling Mounting - Ceiling Suspended and Convertible Surface Indoor Units 1. Prepare four (4) hanging bolts (each bolt length should be the Anchor Nut 33-11/ /8 same length). 2. Select and mark the areas where the hanging bolts and the Ceiling piping access holes should be placed on the ceiling. Nut Washer 3. Drill the holes. Add the washers and regular nuts to the hanging bolts. Insert the anchor nuts into the ceiling, then firmly mount the Hanging Bolt suspension bolts to the anchor nuts. 4. Tighten the washers and regular nuts to lock the hanging bolts to the ceiling. 5. Secure the hangers on the indoor units to the hanging bolts using nuts, washers, and spring washers. 6. Measure for level. Adjust the angle as necessary by tightening and / or loosening the hanging bolts. 7. Adjust the slope by tightening and / or loosening the hanging bolts. The indoor unit should have a slight incline so it will drain easily. The incline should be less than or equal to 1, or between 3/8-3/4 inch in drain direction. Do not damage power wiring during installation. There is risk of electric shock, which may result in physical injury or death. Do not damage power wiring during installation. There is a risk of equipment malfunction, which may result in property damage. Figure 36: Close Up of Hanging Bolt Installation. Hanging bolt (W3/8 or M1) Nut (W3/8 or M1) Spring washer (M1) Flat washer for M1 (accessory) Flat washer for M1 (accessory) Nut (W3/8 or M1) Figure 35: Ceiling Mounting for Ceiling Suspended Indoor Units. Unit: Inch Ceiling Nut Suspension Bolt Anchor Nut Piping Hole Ø1-3/4 Washer 1-9/ /4 Suspension Bolt Hanging Bolt Spring Washer Hanger Max. 1/2 inch 9-1/4 Nut Washer Figure 37: Ceiling Mounting for Convertible Surface Indoor Units. Hanging Bolt 2 3-5/16 Reference of Piping Hole Ø1-3/4 The following parts are field supplied: Hanging bolt - W-3/8 or 1/2 Flat washer - M1 Nut - W-3/8 or M1 Anchor Nut Spring washer - M1 Suspension Bolt The threaded rod hangers (bolts) and hardware must be securely tightened to prevent the unit from falling from its installation location. There is a risk of personal injury from falling equipment. Unit: Inch Spring Washer Hanger Max. 1/2 inch Nut Washer 64 GUIDELINES

65 APPLICATION GUIDELINES General Wall Mounting - Convertible Surface / General Drain Piping Information General Wall Mounting - Convertible Surface Indoor Units The wall you select should be strong and solid enough to prevent vibration. 1. Select and mark the areas where the screws and piping access holes should be placed on the wall. Mark a center line. 2. Mount the mounting plate on the wall with type A screws. If mounting the unit on a concrete wall, use anchor bolts. 3. Align the mounting plate horizontally. Use the center line as a guide. Verify with a level. Figure 38: Mounting Plate Location for Convertible Surface Indoor Units. Figure 39: Securing the Mounting Plate. Installation Plate 2-3/4 Installation Plate 2-3/4 Ø 2-3/4 4-3/4 Ø 2-3/4 Left Rear Piping Unit: Inch More than 7-7/8 Floor Right Rear Piping General Drain Piping Information Indoor units generate water during cooling operation, therefore, properly handling this condensation must be considered. Floor standing, ceiling suspended, and convertible surface indoor units apply the gravity drain method, but a field-supplied condensate pump can be installed (optional, sold separately). Depending on the location of the indoor unit, condensation can be drained directly to the outside of the building, or a common indoor unit drainage piping system can be installed. Drain Hose Floor standing, ceiling suspended, and convertible surface indoor units have a built-in drain hose. If necessary, the drain hose can be extended. Type "A" Screw Do not damage power wiring during installation. There is risk of electric shock, which may result in physical injury or death. Do not damage power wiring during installation. There is a risk of equipment malfunction, which may result in property damage. Figure 4: Floor Standing Indoor Unit with Gravity Drain and Down Slope. Down Slope Figure 41: Ceiling Suspended and Convertible Surface (Ceiling Mounted Installation) Indoor Unit with Gravity Drain and Down Slope. Down Slope Application Guidelines Drain Piping Drain piping must have down slope (1/5 to 1/1). Any holes through the ceilings, walls, etc., must be large enough to accommodate the drain piping and insulation. To prevent reversal flow, do not provide up and down slope. Do not exert extra force on the drain port on the indoor unit during drain piping connection. Table 44: Indoor Unit Drain Piping Specifications. Indoor Unit Drain Type Drain Pipe Diameter (ID, in.) Floor Standing Ø1 Ceiling Suspended Gravity Convertible Surface Ø5/8 Figure 42: Convertible Surface (Wall Mounted Installation) Indoor Unit with Gravity Drain and Down Slope. Down Slope GUIDELINES 65

66 APPLICATION GUIDELINES General Drain Piping Information Drain Leak Test A leak test should be performed 24 hours after the drainage system has been installed. Figure 43: Properly Insulating the Drainage Piping. MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Drain Pipe Insulation To prevent condensate from forming on the drain piping, fieldsupplied 5/16 inch thick polyethylene insulation should be properly installed. Ensure the indoor unit, refrigerant piping, power wiring / communication cables, and drain piping is properly supported with anchor bolts and clamp hangers positioned at to 4.9 foot intervals. Insulation Not Required Insulation Requir ed Properly Fitting Insulation Common Indoor Unit Drainage System It is usual work practice to connect individual indoor unit drain pipes to one common indoor unit drainage system. The diameter of the common vertical drain pipe should be as large as necessary. The diameter of the horizontal pipe should be the same or larger than the vertical drain pipe. To avoid property damage in the event of the primary drain becoming clogged, and to optimize drain system performance, it may be prudent to install a secondary drain line. Design the drain system to plan for winter operation (condensate line may freeze up if condensate does not properly drain away). Drain all generated condensate from the external condensate pan to an appropriate area. Install a trap in the condensate lines as near to the indoor unit coil as possible. To prevent overflow, the outlet of each trap should be positioned below its connection to the condensate pan. All traps should be primed, insulated, and leak tested if located above an inhabited space. Figure 44: Example of a Common Indoor Unit Drainage System. 45 to 6 Angle 45 to 6 Angle 45 to 6 Angle 1/5 to 1/1 Slope 45 to 6 angle for protection against overflow Common horizontal drain pipe 27-1/2 in. (Maximum pump lift distance [depends on indoor unit type]). Position the vent down to prevent debris from entering the system Common vertical drain pipe It is recommended that a dedicated drain pipe be installed for the air conditioning system. If the indoor unit drainage system is shared with a rainwater drain, waste water, or any other type of building drain system, back flow, leaks, ice may form, or noxious odors may infiltrate the air conditioning system. Install a trap if the drain access to the outside faces an undesirable location (i.e., sewer), otherwise, noxious odors may infiltrate the air conditioning system. 66 GUIDELINES Include trap at the end.

67 APPLICATION GUIDELINES Wiring Guidelines General Power Wiring / Communications Cable Guidelines Follow manufacturer s circuit diagrams displayed on the inside of the control box cover. Have a separate power supply for the indoor units. Provide a circuit breaker switch between the power source and the indoor unit. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±1 percent of the rated current marked on the name plate. Confirm wiring / cable thickness specifications: Power wiring is field supplied. Wire size is selected based on the larger MCA value, and must comply with the applicable local and national codes. Communication cable must be a minimum of 18 AWG, two-conductor, stranded, shielded, and must comply with the applicable local and national codes. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist. Include a disconnect in the power wiring system, add an air gap contact separation of at least 1/8 inch in each active (phase) conductor. Any openings where the field wiring enters the cabinet must be completely sealed. Terminal screws may loosen during transport. Properly tighten the terminal connections during installation or risk electric shock, physical injury or death. Loose wiring may cause the wires to burnout or the terminal to overheat and catch fire. There is a risk of electric shock, physical injury or death. Terminal screws may loosen during transport. Properly tighten the terminal connections during installation or risk equipment malfunction or property damage. Loose wiring may cause unit malfunction, the wires to burnout or the terminal to overheat and catch fire. There is a risk of equipment malfunction or property damage. A voltage drop may cause the following problems: Magnetic switch vibration, fuse breaks, or disturbance to the normal function of an overload protection device. Compressor will not receive the proper starting current. Power Wiring and Communications Cable Connections 1. Insert the power wiring / communications cable from the outdoor unit or heat recovery unit (Heat Recovery systems only) using the designated path in the indoor unit. 2. Connect each wire to its appropriate terminal on the indoor unit control board. Verify that the color and terminal numbers from the outdoor unit or heat recovery unit (Heat Recovery systems only) wiring match the color and terminal numbers on the indoor unit. 3. Secure the power wiring / communications cable. Figure 45: Location of Power Wiring / Communications Cable Terminals in Floor Standing Indoor Units. Cased Uncased Application Guidelines L(L1) N(L2) YL RD BK A B L(L1) N(L2) YL RD BK A B Power Supply High Voltage (28/23V) Communications Power Supply High Voltage (28/23V) Communications Lock nut Conduit Lock nut Conduit mounting plate Conduit Conduit mounting plate GUIDELINES 67

68 Rem ot e Co nt ro ler TEMP Remote Controlle r TEMP Remote Controlle r TEMP APPLICATION GUIDELINES Wiring Guidelines Figure 46: Location of Power Wiring / Communications Cable Terminals in Ceiling Suspended Indoor Units. Figure 47: Location of Power Wiring / Communications Cable Terminals in Convertible Surface Indoor Units. MULTI V Floor, Suspended, Convertible Indoor Unit Engineering Manual Figure 48: Simplified View of Indoor Unit Terminal Connections Floor Standing. Outdoor Unit Terminal Block Ground 1(L1) 2(L2) Power Supply High Voltage (28/23V) L(L1) 1(L1) 2(L2) 3(A) 4(B) Power Input 28-23V / 6 Hz / 1 Phase 3(A) 4(B) Communication Indoor Unit Terminal Block N(L2) Power Input 28-23V / 6 Hz / 1 Phase 1(L1) 2(L2) 3(A) 4(B) Power Input 28-23V / 6 Hz / 1 Phase Ground Indoor Unit Terminal Block Ground A B B B B SODU SODU Conduit IDU A - - B A IDU Lock nut INTERNET Conduit mounting plate Outdoor Unit Terminal Block INTERNET DRY1 DRY1 DRY2 DRY2 GND 12V Figure 49: Simplified View of Indoor Unit Terminal Connections Ceiling Suspended. Outdoor Unit Terminal Block Indoor Unit Terminal Block SODU IDU INTERNET DRY1 DRY2 GND 12V 1(L1) 2(L2) A - - B A Figure 5: Simplified View of Indoor Unit Terminal Connections Convertible Surface. Power Supply High Voltage (28/23V) GND 12V A - - B A (A) 4(B) Communication Wired Controller Placement Floor standing, ceiling suspended, and convertible surface indoor units can be used with various wired controllers (optional; sold separately). Wired controllers include a sensor to detect room temperature. To maintain comfort levels in the conditioned space, the wired controller must be installed in a location away from direct sunlight, high humidity, and where it could be directly exposed to cold air. Controller must be installed four (4) to five (5) feet above the floor where its LED display can be read easily, in an area with good air circulation, and where it can detect an average room temperature. NO YES Conduit Lock nut Conduit mounting plate Figure 51: Proper Location for the Wired Controller. Do not install the wired controller near or in: Drafts or dead spots behind doors and in corners Hot or cold air from ducts Radiant heat from the sun or appliances Concealed pipes and chimneys An area where temperatures are uncontrolled, such as an outside wall 68 GUIDELINES NO 4 to 5 feet above the floor NO

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