Ceiling Cassette INDOOR UNIT

Transcription

1 EM-MultiV-CeilingCassette-IndoorUnits-1-15 Ceiling Cassette INDOOR UNIT Engineering Manual One-Way Ceiling Cassettes 7,5 to 24,2 Btu/h Two-Way Ceiling Cassettes 19,1 to 24,2 Btu/h Four-Way Ceiling Cassettes 5,5 to 48,1 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 One-Way Ceiling-Cassette Indoor Units Mechanical Specifications General Data Electrical Data External Dimensions Electrical Wiring Diagrams Refrigerant Flow Diagrams Acoustic Data Air Velocity / Temperature Distribution Capacity Tables Optional Accessories Two-Way Ceiling-Cassette Indoor Units Mechanical Specifications General Data Electrical Data External Dimensions Electrical Wiring Diagrams Refrigerant Flow Diagrams Acoustic Data Air Velocity / Temperature Distribution Capacity Tables Optional Accessories Four-Way Ceiling-Cassette Indoor Units Mechanical Specifications General Data Electrical Data External Dimensions Electrical Wiring Diagrams Refrigerant Flow Diagrams Acoustic Data Air Velocity / Temperature Distribution Fresh Air Ventilation Capacity Tables Optional Accessories Application Guidelines Selecting the Best Location...11 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 Family ARN = Multi V Indoor Unit (Refrigerant R41A) MULTI V Ceiling Cassette Indoor Unit Engineering Manual 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) L2 = Ducted (low static) L3 = Ducted (low static) Feature A = Basic C = Plasma Filter G = Low Static 42 = 42, Btu/h 48 = 48, Btu/h 54 = 54, Btu/h 76 = 76, Btu/h 96 = 96, Btu/h NJ = Vertical/Horizontal Air Handling Unit NK = Vertical/Horizontal Air Handling Unit S8 = Wall Mounted/Mirror (large frame) SE = Wall Mounted/Mirror (small frame) SB = Standard Wall Mounted SC = Standard Wall Mounted TT = 1-Way Ceiling Cassette TU = 1-Way Ceiling Cassette TL = 2-Way Ceiling Cassette TM = 4-Way Ceiling Cassette L = Neo Plasma R = Mirror and Neo Plasma U = Uncased 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 Generation 2 = Second 4 = Fourth A = Second, Revision A 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) 73 SER2 7,5 8,5 247/212/ SER2 9,6 1,9 282/247/ /16 x 6-1/2 x 11-1/ SER2 12,3 13,6 353/283/212 1/4, 1/2 153 SER2 15,4 17,1 371/283/ S8R2 19,1 21,5 58/459/ /16 x 7-7/8 x 11-13/ S8R2 24,2 27,3 632/58/424 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/ TUC4 Body: 33-7/8 x 17-3/4 x 6-11/16 Panel: 43-5/16 x 19-3/4 x 1-3/8 9,6 1,9 325/34/ TUC4 12,3 13,6 353/325/29 Body: 33 Panel: 1 1/4, 1/2 183 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') 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/ TPC4 Panel: 37-3/8 x 37-3/8 x 1-7/16 28, 31,5 671/565/ TNC4 Body: 33-1/16 x 33-1/16 x 9-5/8 Panel: 37-3/8 x 37-3/8 x 1-7/16 36,2 4,6 883/777/ TMC4 Body: 33-1/16 x 33-1/16 x 11-5/16 42, 43,8 1,59/918/ TMC4 Panel: 37-3/8 x 37-3/8 x 1-7/16 48,1 51,2 1,13/953/883 Body: 48 Panel: 13 Body: 54 Panel: 13 Body: 59 Panel: 13 1/4, 1/2 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 5

6 Indoor Unit Overview Ducted MULTI V Ceiling Cassette 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 1,13/1,3/ BGA4 36,2 4,6 1,3/894/ BGA4 42, 43,8 893/77/ BRA4 48,1 51,2 1,5/1,395/1, /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, 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 2/243/ /16 x 7-7/8 x 19-5/16 123VEA2 12,3 13,6 325/2/ /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 Simple Controller with mode selection PQRCVCLQ PQRCVCLQW Black White 164 Allows control of indoor unit on/off, operation mode, fan speed, and temperature setpoint for up to 16 indoor units. MULTI V Ceiling Cassette Indoor Unit Engineering Manual Simple Controller without mode selection LG Premium Controller LG Programmable Thermostat PQRCHCAQ PQRCHCAQW Black White 164 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, 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 Ceiling Cassette 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. Feature Wall Mounted Standard Finish Wall Mounted ART COOL Mirror 1-Way Cassette 2-Way Cassette 4-Way Cassette Ducted High Static Ducted Low Static MULTI V Ceiling Cassette Indoor Unit Engineering Manual Airflow Operation Filter Controllers Others 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 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 Secondary plasma filters. 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 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 Secondary plasma filters. 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 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. MULTI V Ceiling Cassette Indoor Unit Engineering Manual 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). Figure 1: Screenshot of LATS Pipe System Design Tool in Tree Mode. 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. 14 Introduction

15 ONE-WAY CEILING CASSETTE Mechanical Specifications on page 16 General Data on page 17 Electrical Data on page 19 External Dimensions on page 2 Electrical Wiring Diagrams on page 22 Refrigerant Flow Diagrams on page 24 Acoustic Data on page 25 Air Velocity / Temperature Distribution on page 29 Capacity Tables on page 37 Optional Accessories on page 41

16 One-Way Ceiling Cassette Mechanical Specifications MULTI V Ceiling Cassette Indoor Unit Engineering Manual Casing The case is designed to mount recessed in the ceiling and has a surface-mounted concentric grille on the bottom of the unit. The unit case is manufactured with coated metal. Cold surfaces are covered with a coated polystyrene insulating material. The case is provided with metal ears designed to support the unit weight on four corners. Ears have pre-punched holes designed to accept field-supplied all-thread rod hangers. Ventilation Air The case has a factory designated cutout for the connection of a field-supplied outside air duct and flange. Architectural Filter/Grille The ceiling cassette assembly is provided with an off-white ABS polymeric resin architectural grille with a tapered trim edge and a hinged, spring clip (screw-less) return air filter-grille door. Fan Assembly and Control The indoor unit has a single, direct-drive, cross-flow tangential Sirocco fan made of high strength ABS GP-235 polymeric resin. The fan motor is 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 on vibration attenuating rubber grommets. The fan impeller is statically and dynamically balanced. The fan speed is controlled using a microprocessor-based 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-speed or auto-speed setting that adjusts the fan speed to simulate natural airflow. Air Filter Return air is filtered with a removable, washable filter with anti-fungal treatment. The unit is also equipped with a plasma filter. Airflow Guide Vanes The architectural grille 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 4º in an up/down direction with the capability of locking the vanes in a field adjusted fixed position. Microprocessor Controls The unit is provided with an integrated microprocessor controller 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 operation 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: 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 16 One-Way For Heat Recovery systems the Auto Changeover setting automatically switches control of the indoor unit between Cooling and Heating modes based on space 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 indoor unit operation when the indoor room temperature falls below set-point temperature. At which point, a signal is sent to 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 wireless remote controller. In lieu of wireless remote or factory return air thermistor, screw terminals 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 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 wall-mounted local or central controller, displayed diagnostic codes are specific, alpha-numeric, and provide the service technician with a reason for the code displayed. Condensate Lift/Pump The indoor unit comes with a factory installed and wired condensate lift/pump capable of providing a minimum 27.5 inch lift from the bottom surface of the unit. The lift pump comes with a safety switch that shuts off the indoor unit if condensate rises too high in the drain pan. Condensate Drain Pan The condensate drain pan is constructed of EPS (expandable polystyrene resin). Coil The indoor unit coil is constructed with grooved design copper tubes with slit coil fins, two (2) rows, twenty-one (21) fins per inch. 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 Group control High ceiling Hot start Self diagnostics Timer (on / off) Weekly schedule Auto direction/swing (up/down) Fan speed control Jet cool (fast cooling)

17 One-Way Ceiling Cassette General Data Table 11: One-Way Ceiling Cassette (TU Frames) Indoor Unit General Data. Cooling Mode Performance Model No. ARNU73TUC4 ARNU93TUC4 ARNU123TUC4 Capacity (Btu/h) 7,5 9,6 12,3 Power Input 1 (W) Heating Mode Performance Capacity (Btu/h) 8,5 1,9 13,6 Power Input 1 (W) Entering Mixed Air Cooling Max ( F WB) Heating Min ( F DB) Unit Data Refrigerant Type 2 R41A R41A R41A Refrigerant Control EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 32 / 29 / / 34 / / 35 / 32 Net Unit Weight (lbs.) Shipping Weight (lbs.) Grille Weight (lbs) 1 / 12 1 / 12 1 / 12 Grille Shipping Weight (lbs) 16 / / / 18 Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 Fan Type Cross Flow Cross Flow Cross Flow Quantity Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) 29 / 258 / / 34 / / 325 / 29 Piping Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 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 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 communications cable at any other point. One-Way Ceiling Cassette Product Data One-Way 17

18 One-Way Ceiling Cassette General Data Table 12: One-Way Ceiling Cassette (TT Frames) Indoor Unit General Data. MULTI V Ceiling Cassette Indoor Unit Engineering Manual Cooling Mode Performance Model No. ARNU183TTC4 ARNU243TTC4 Capacity (Btu/h) 19,1 24,2 Power Input 1 (W) 7 7 Heating Mode Performance Capacity (Btu/h) 21,5 24,2 Power Input 1 (W) 7 7 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) 4 / 37 / / 4 / 36 Net Unit Weight (lbs.) Shipping Weight (lbs.) Grille Weight (lbs) 13 / / 15 Grille Shipping Weight (lbs) 2 / 22 2 / 22 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) 47 / 427 / / 47 / 46 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.) 1 1 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 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 communications cable at any other point. 18 One-Way

19 ONE-Way Ceiling Cassette Electrical Data Table 13: One-Way Ceiling Cassette Indoor Unit Electrical Data. Model Number Voltage Power Supply Power Input (W) Range MCA MOP Rated Amps (A) Hz Volts Phase Cooling Heating TU Frames ARNU73TUC ARNU93TUC ARNU123TUC TT Frames ARNU183TTC ARNU243TTC One-Way Ceiling Cassette Product Data One-Way 19

20 One-Way Ceiling Cassette External Dimensions TU Frame with PT-UUC Grille Figure 2: ARNU73TUC4, ARNU93TUC4, ARNU123TUC4 Dimensions (PT-UUC Grille). MULTI V Ceiling Cassette Indoor Unit Engineering Manual 2-1/4 3-13/16 5-1/4 6-5/8 12-5/8 1-1/ / /16 3-7/ /16 4-3/16 8-1/8 1-11/ /16 (Air outlet Hole) 43-5/16 Unit: inches Note: All measurements have a tolerance of ±1/4 in. 1-3/ /16 2 One-Way

21 One-Way Ceiling Cassette External Dimensions TT Frame with PT-UTC Grille Figure 3: ARNU183TTC4, ARNU243TTC4 Dimensions (PT-UTC Grille). 13/16 1-1/4 6-7/8 3-13/16 3-1/2 2-1/4 9-3/4 7-1/16 2-9/16 5-3/ / /16 2-9/ /4 One-Way Ceiling Cassette Product Data 55-15/ /4 (Air Outlet Hole) Unit: inches Note: All measurements have a tolerance of ±1/4 in. 1-5/ /16 One-Way 21

22 MULTI V Ceiling Cassette Indoor Unit Engineering Manual One-Way Ceiling Cassette Electrical Wiring Diagram TU and TT Frames Figure 4: TU, TT Frame Wiring Diagram. 22 One-Way

23 One-Way Ceiling Cassette Electrical Wiring Diagram TU and TT Frames Table 14: TU, TT Frame Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line input for indoor controller CN-MOTOR1 Fan motor output Motor output of BLDC CN-D/PUMP Drain pump output AC output for drain pump CN-PTC Auxiliary heater Auxiliary heater connection CN-FLOAT Float switch input Float switch sensing CN-EEV EEV output EEV Control output CN-DISP Display Display of indoor status CN-OPTION Option PCB (EPROM) Option PCB connection CN-ROOM Room sensor Room air thermistor CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-REMO Remote controller Remote control line CN-CC Dry Contact Connection to Dry Contact (Optional) CN-AIRC Air Clean Air Cleaner control CN-VANE1 Step Motor Step motor output CN-VANE2 Step Motor Step motor output CN-485 Communication Connection between indoor and outdoor units CN-COM Communication Connection on Sub PCB between indoor and outdoor units Table 15: TU, TT Frame DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP Master Slave Group Control setting using 7-Day Programmable Controller SW4 DRY CONTACT Variable Auto Dry Contact Mode Setting 1. Variable: Auto/Manual Mode can be chosen by 7-Day Programmable Controller or Wireless Remote Controller (when shipped from factory -> Manual Mode) 2. Auto: For Dry Contact, it is always Auto mode SW5 EXTRA 1 Off On No Function SW8 COMMUNICATIONS RATE Gen. 2 Gen. 4 -OFF: 1.2kbps -ON: 9.6kbps For Multi V systems, DIP switches 1, 2, 6, and 7 must be set to OFF. These DIP switches are used for other models. One-Way Ceiling Cassette Product Data One-Way 23

24 One-Way Ceiling Cassette Refrigerant Flow Diagram TU and TT Frames MULTI V Ceiling Cassette Indoor Unit Engineering Manual Figure 5: TU, TT Frame Piping Diagram. Table 16: TU, TT Frame Refrigerant Pipe Connection Port Diameters. TU Frames Heat Exchanger EEV Filter Th3 Th2 C.F.F. Filter Th1 lndoor unit Model Liquid (inch) Gas (inch) Refrigerant pipe connection port diameter ARNU73TUC4 ARNU93TUC4 ARNU123TUC4 TT Frames ARNU183TTC4 1/4 1/4 1/2 1/2 ARNU243TTC4 3/8 5/8 Table 17: TU, TT Frame Thermistors. Thermistor Description TH1 Return air thermistor TH2 Pipe in thermistor TH3 Pipe out thermistor Cooling Heating 24 One-Way

25 One-Way Ceiling Cassette Acoustic Data Sound Pressure Levels Figure 6: Sound Pressure Measurement Location. feet Measurements are taken 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. Microphone Table 18: One-Way Ceiling Cassette Indoor Unit Sound Pressure Levels. Model Sound Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed TU Frames ARNU73TUC ARNU93TUC ARNU123TUC TT Frames ARNU183TTC ARNU243TTC Figure 7: ARNU73TUC4, ARNU93TUC4, and ARNU123TUC4 Sound Pressure Level Diagrams. ARNU73TUC4 ARNU93TUC4 ARNU123TUC4 One-Way Ceiling Cassette Product Data One-Way 25

26 MULTI V Ceiling Cassette Indoor Unit Engineering Manual One-Way Ceiling Cassette Acoustic Data Sound Pressure Levels Figure 8: ARNU183TTC4 and ARNU243TTC4 Sound Pressure Level Diagrams. ARNU183TTC4 ARNU243TTC4 26 One-Way

27 One-Way Ceiling Cassette Acoustic Data Sound Power Levels Table 19: One-Way Ceiling Cassette Indoor Unit Sound Power Levels. Model Sound Power Levels db(a) High Fan Speed TU Frames ARNU73TUC4 5. ARNU93TUC4 53. ARNU123TUC4 57. TT Frames ARNU183TTC4 59. ARNU243TTC4 62. 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. Figure 9: ARNU73TUC4, ARNU93TUC4, and ARNU123TUC4 Sound Power Level Diagrams. ARNU73TUC4 ARNU93TUC4 ARNU123TUC4 One-Way Ceiling Cassette Product Data One-Way 27

28 One-Way Ceiling Cassette Acoustic Data Sound Power Levels Figure 1: ARNU183TTC4 and ARNU243TTC4 Sound Power Level Diagrams. ARNU183TTC4 ARNU243TTC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual 28 One-Way

29 .5() 1.().5() 31(87.8) ) 36(96.8) 1.().5 One-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU73TUC4 Figure 11: ARNU73TUC4. Discharge angle: 2 Cooling Discharge angle: 2 Heating Air velocity [m/s(ft/s)] 1.().5() 1.5( ) 2.() Air velocity [m/s(ft/s)].5(1. 6) 1.( ).5() 1.5() 2.() (ft). 5() (ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) Temperature [ C( F)] 22(71.6) 5m(16.4ft) 4m(13.1ft) Discharge angle: 5 Air velocity [m/s(ft/s)].5( ).5() 3m(9.8ft) 22(7 ) 3m(9.8ft) Cooling (ft) (ft) 2() 18(64.4) (ft) (ft).5() 1.5() 2.(6.6) 1.( ) 2.5(8.2).5 () 1.5 (ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) Temperature [ C( F)] 28(82.4).1(.3) 24() 5m(16.4ft) 4m(13.1ft) Discharge angle: 6 Air velocity [m/s(ft/s)].1(.3).1(.3) 3m(9.8ft) (ft) 26(7 8.8) 3() 28(82.4) Heating.1(.3) 24( ) 3m(9.8ft) (ft) 24().5() 1.5() (ft) 1.( ) 26(78.8) (ft).1(.3).5().1(.3) 2.() 2.5(8.2).1(.3) (ft) (ft) (ft) One-Way Ceiling Cassette Product Data.5(1. 6) (ft).1(.3).5().5 ( ).5().5() 1.(). 1 (ft).5() 1.() 5m(16.4ft) 4m(13.1ft) 3m(9.8ft).5() 1.().5() (ft) 1.() (ft).5() 5m(16.4ft) 4m(13.1ft). 1(.3) 3m(9.8ft).5() (ft).5 () (ft) Te mperature [ C( F)] 32(89.6) 3() 32(89.6) Te mperature [ C( F)] 32( 89.6) 3() 31(87.8) 3() 28(82.4) 28 (82.4) 22(7) (ft) 32(89.6 ) 31(87.8) 31(87. 8) 32(89.6) 33(91.4) 34(93.2 ) 36(96.8) (ft) 32(8 9.6) 28(82.4) 26(78.8 ) 24() 24() (ft) 32(89.6 ) 33(91.4 ) 34(93.2 ) 34(93.2) 36(96.8 ) (ft) 5m(16.4ft) 3() 28(82.4) 4m(13.1ft) 3m(9.8ft) 26(78.8) 28(82.4) (ft) 26(78.8) (ft) 24() 5m(16.4ft) 31(87. 8) 4m(13.1ft) 3m(9.8ft) 34(93.2) (ft) 36(96.8) (ft) 35(95) The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. One-Way 29

30 26(78.8) One-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU73TUC4, ARNU93TUC4 Figure 12: ARNU73TUC4, continued. Discharge angle: 7 Cooling Discharge angle: 7 Heating Air velocity [m/s(ft/s)] Air velocity [m/s(ft/s)] 2.(6.6) 2.(6.6) 1.5(4.9 ) (ft) 1.5(4.9) (ft) MULTI V Ceiling Cassette Indoor Unit Engineering Manual 5m(16.4ft) 4m(13.1ft) Te mperature [ C( F)] 5m(16.4ft) 4m(13.1ft) Figure 13: ARNU93TUC4. 22( 7) 24() Discharge angle: 2 Air velocity [m/s(ft/s)] 1. (3.3 ) 22(7).5() 3m(9.8ft) (ft) (ft) 3m(9.8ft) (ft) (ft) Cooling 24() 22(71. 6) 1.5() 2.() 1.().5().5() 1.() 1.() 2() 2() 18 (64. 4).5() (ft) (ft) (ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) Te mperature [ C( F)] 3 () 5m(16.4ft) 4m(13.1ft) Discharge angle: 2 Air velocity [m/s(ft/s)] 1.().5().5() 3m(9.8ft) (ft) (ft) 3() 32(89.6 ) 3m(9.8ft) (ft) (ft) Heating 1.5() 1.().5(1. 6) 1.() 2.() 2.5(8.2).5() 3 () 32(89.6) 32( 89.6) 1.(3. 3). 5( 1. 6) 34 (93.2 ) 3 () (ft) (ft) (ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) Te mperature [ C( F)] 22(7) 22(7) 2() 18(64.4) Te mperature [ C( F)] 28(82.4) 3() 28(82.4) 26(78. 8) 3() (ft) 26(78.8) 26 (78.8) (ft) (ft) 24( 75. 2) (ft) 24() The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 3 One-Way 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft)

31 3() 28(82.4) One-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU93TUC4 Figure 14: ARNU93TUC4, continued. Cooling Discharge angle: 5 Discharge angle: 6 Heating Air velocity [m/s(ft/s)].5(). 3.5() 1 Air velocity [m/s(ft/s)].1(.3).1(.3).5().5() 1.(3. 3).5() 2. ( ) 1. () 1.5().5() (ft).1(.3).1(.3).5( ).5() 1.( ).5() 1.( ) 1.5( ) 2.( ) 1.() (ft). 5(1.6) 1.5() (ft) 1.5().5() 1.5(4. 9) (ft) 32(89.6) 28(82.4) 3() Discharge angle: 7 Air velocity [m/s(ft/s)] 3() 32(89.6) 28( 82.4) 28(82.4 ) 1.() 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) Temperature [ C( F)] 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) 3 ( ) Cooling 28 (82.4).5( ) 1.().5() (ft) (ft) 32(89.6) 26(78.8) 24() 22(7) (ft) (ft) 24().5( ) 1.5() 2.() 1.5 ( ).5() (ft) (ft) (ft) 32(89.6) 31(87.8) 31(87.8) 32(8 9.6 ).1(.3 ) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) Discharge angle: 7 Air velocity [m/s(ft/s)] 32(89.6) 32(89.6) 31(87.8) 33(91.4) 31( 87. 8) 32(89.6) 34(93.2) 34(93. 2).5().1(.3).5().1(.3) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) Temperature [ C( F)] 33(91.4) 33(91.4) Heating 35(95) 34(93.2) 35(95) 36(96.8) 33(91.4) 37( 98. 6) 1.() (ft) 37 (98.6) 36(96. 8) (ft).5 () 1.() 38 (1.4) 36(96.8) 1.5( ) 1.() 36(96.8 ).5().5() 1 (ft) (ft) (ft) One-Way Ceiling Cassette Product Data.5() (ft).5 () (ft) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft).5() (ft) (ft) 5m(16.4ft) 4m(13.1ft).5() 3m(9.8ft) (ft) (ft).5() Temperature [ C( F)] 24( ) 26(78.8) 24() 26(78.8) 24() 22(71.6) 2( ) 18(64.4 ) (ft) Temperature [ C( F)] 3( ) 34(93.2 ) (ft) 22(7) 22 (7) 22(7) 2( ) (ft) 32(89.6) 32 (89. 6) 3() (ft) 2() 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 5m(16.4ft) 4m(13.1ft) 3() 3m(9.8ft) 32(89.6) (ft) (ft) One-Way 31

32 22( 71.6).5() 1.( ) 24() 24() 32(89.6) 31(87.8) 33(91.4) One-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU123TUC4 Figure 15: ARNU123TUC4. Discharge angle: 2 Cooling Discharge angle: 2 Heating Air velocity [m/s(ft/s)] 1.() 1.5() 2.() 2.5(8.2) 1.().5() Air velocity [m/s(ft/s)] 1.().5() 1. 5() 1.() 2.() 2.5(8.2).5().5() (ft) (ft) MULTI V Ceiling Cassette Indoor Unit Engineering Manual 5m(16.4ft) Temperature [ C( F)] 5m(16.4ft) Air velocity [m/s(ft/s)] Cooling Discharge angle: 5 Discharge angle: 6 5m(16.4ft).5() 4m(13.1ft) 4m(13.1ft).5() 22(7) 4m(13.1ft).5( ) 3m(9.8ft) 3m(9.8ft) 3m(9.8ft).5() (ft).5 ( ) 2() (ft).5() (ft).5( ) 1.5() 22(7) 2.() 1.5 () (ft) 18(64.4) (ft) 1.() 2.5(8.2) (ft) 1.().5() 1.() 1.5(4.9) 1.() (ft) (ft) (ft) (ft) (ft) 5m(16.4ft) Temperature [ C( F)] 28(82.4 ).5() 5m(16.4ft) 26(78.8) Air velocity [m/s(ft/s)].1(.3 ) 4m(13.1ft) 4m(13.1ft).1(.3).1(.3).5() 3() 24( 75. 2) 24( ) 28(82.4).5(1. 6) 3m(9.8ft) 24( ) 3m(9.8ft) Heating 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft).1(.3).5() 26(78.8).1(.3) 3().5() 1.( ) (ft) 32(89.6) (ft).5() 1.() 28(82.4).5(1.6) 1.( ) 24(75.2) 1.5() (ft) 1.5(4. 9) 2.() 26(78.8) (ft).5( ) 1.() 1.().5() 1. 5(4.9) 26(78.8).5() 24( ) (ft) (ft) (ft) (ft) (ft) Temperature [ C( F)] 32(89.6) 32(89.6) 3() Temperature [ C( F)] 32(89.6) 31(87.8) 32(89.6) 32(89.6) 28( 82.4) 3() 26(78.8) 22( 7) (ft) 32( 89.6) 33(91.4) 33(91.4) (ft) 28( 82.4) 26(78.8) 31(87.8) 35 (95 ) 37 (98.6) 3() 28(82.4) 26(78.8) (ft) 34(9 3.2) 36(96.8) 36(96.8) (ft) 5m(16.4ft) 4m(13.1ft) 3( ) 3m(9.8ft) 28(8 2. 4) 26(78.8) 26(78.8) 26(78.8) 28(8 2. 4) (ft) 24() (ft) The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 5m(16.4ft) 32(8 9.6) 4m(13.1ft) 34(93.2) 34(93.2) 3m(9.8ft) 35(95) (ft) 37(98.6) (ft) 37(98.6) 36(96.8) 32 One-Way

33 28(8 2.4 ) 22(7) One-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU123TUC4, ARNU183TTC4 Figure 16: ARNU123TUC4, continued. Discharge angle: 7 Cooling Discharge angle: 7 Heating Air velocity [m/s(ft/s)] Air velocity [m/s(ft/s)] 1.( ) 1.5( ).5() 2. 5( 8.2) 2.( ) (ft).5(1.6) 1.5(4.9) 2.( ) (ft) 1.() 1.() 1.().5( ) 1.5( ).5(1. 6) (ft). 5(). 5(1. 6) (ft) 5m(16.4ft) 4m(13.1ft) Temperature [ C( F)] 5m(16.4ft) 4m(13.1ft) Figure 17: ARNU183TTC4. Discharge angle: 2 Air velocity [m/s(ft/s)] 1.(3. 3).5().1(.3).5() 3m(9.8ft) 3() 3m(9.8ft) Cooling 1.() (ft) (ft) 32(89.6) 3(8 6) 32 (89.6) 34 (93.2) (ft) (ft) 1.5() 1.().5() 2.() 32(89.6) 3( ) (ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) Temperature [ C( F)] 24() 5m(16.4ft) 4m(13.1ft) Discharge angle: 2 Air velocity [m/s(ft/s)].5().5().5() 1.() 22(71.6).5() 3m(9.8ft) (ft) (ft) 24() 24() 22 (7) 2() 22(7) 3m(9.8ft) (ft) (ft) Heating 1.5() 1.() 18 (64.4).5() 2.() 2() 18(64.4) 2(6 8) (ft) (ft) (ft) One-Way Ceiling Cassette Product Data.5(1.6) (ft) (ft) 5m(16.4ft).5() 4m(13.1ft) 3m(9.8ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) Temperature [ C( F)] 2() 2() 22(7) 2() 18(64.4) Temperature [ C( F)] 3() 3() 32(89.6) 34(93.2) 3() 28(82.4) 22(7) (ft) 28(82.4) (ft) 22(7) 26(78.8) 22(71.6) (ft) 26 (78.8) 24() 26(7 8.8 ) (ft) 22(7) 24() 24() 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) One-Way 33

34 33(91.4) 36(96.8) 1. () One-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU183TTC4 Figure 18: ARNU183TTC4, continued. Cooling Discharge angle: 5 Discharge angle: 6 Heating MULTI V Ceiling Cassette Indoor Unit Engineering Manual Air velocity [m/s(ft/s)] 32(89.6) 3().5() 32(89.6).5() 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) Te mperature [ C( F)] 3( ) 28(82.4) 28(82.4) 28 (82.4) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) Discharge angle: 7 Air velocity [m/s(ft/s)].5().5().5().5() 28(82.4) Cooling 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) 32(89.6) 3().5(1.6) (ft) 26(78.8) (ft) (ft) 1.() 1.5().5( ) 28 (82.4 ) 24 (7 5.2).5 ( ) 2.() 26(78. 8) 1.5() 24() 22(7 ) (ft) 24() (ft) 1.( ) 2.5(8.2) 1.(3.3) 1. (3. 3) 1.5(4. 9).5() 1. () (ft) 1.() 24() 1.5( ).5( ) 2.() 1.() 1.5(4. 9) 1.().5().5(1.6) (ft) (ft) (ft) (ft) (ft) (ft) Air velocity [m/s(ft/s)] 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) Te mperature [ C( F)] 31(87.8) 31(87.8) 31(87.8).5(1. 6) 32(89. 6) 31(87.8) 33( 91.4 ).5().5() 32(89.6) 32(89. 6) 34 (93.2). 5(1.6 ) 33(91.4) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft) Discharge angle: 7 Air velocity [m/s(ft/s)] Heating.5() 32(89.6) 34(93.2) 1. () 1.5( ) 1.5( ) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) (ft).5() 33(91.4 ).5() 36(96.8) 37(98.6) 2.() 1.( ) 1.(3.3).5( ) 38(1.4) 2. 5(8.2).5() 1.() 1.5(4.9) 2.( ) 36(96.8) 36(96.8).5().5().5() (ft) (ft) (ft) (ft) (ft) (ft) Te mperature [ C( F)] Te mperature [ C( F)] 24() 22( 7 ) 22(7 ) 24() 22(7) 24() 18(64.4) 2( ) (ft) 28(82.4) 28(82.4) 3() 3() 3() 34(9 3.2) 36(9 6.8) 32(89.6 ) 32(89.6) 3( ) (ft) 36 (9 6. 8) 5m(16.4ft) 4m(13.1ft) 3m(9.8ft) (ft) 18(64.4) 18(64.4 ) (ft) 2( ) (ft) 28 (8 2.4 ) 3() 26(78.8) 26(78.8) 5m(16.4ft) 4m(13.1ft) 28(82.4) 3() 3m(9.8ft) 32( 89.6) (ft) 32(89.6 ) 34(93.2) 36(96. 8) (ft) 32(89.6) 3(8 6) (ft) The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 34 One-Way

35 31(87.8) 31(87.8) One-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU243TTC4 Figure 19: ARNU243TTC4. Discharge angle: 2 Cooling Discharge angle: 2 Heating Air velocity [m/s(ft/s)].5(1. 6) 1.(3. 3) 1. 5( ) 1.5() 1.() 2.().5().5() (ft) Air velocity [m/s(ft/s)].5().1(.3) 1.5( ).5() 2.() 2.5(8.2) 1.5().1(.3) (ft). 1(.3).5() (ft).5() (ft) 5m(16.4ft) Temperature [ C( F)] 2() 5m(16.4ft) 4m(13.1ft) 4m(13.1ft) Air velocity [m/s(ft/s)] Cooling Discharge angle: 5 Discharge angle: 6.5 ().5( ) 2() 3m(9.8ft) 3m(9.8ft).5() (ft) (ft) 22(7) 1.5().5() 2.() 1.5() (ft) 18(64.4) 2() (ft) 2.5(8.2) 1.(3. 3).5() 22(7).5() 1.( ) 1.5() (ft) (ft) (ft) (ft) 5m(16.4ft) Temperature [ C( F)] 3() 5m(16.4ft) 28 (82.4) Air velocity [m/s(ft/s)].5() 4m(13.1ft) 28(82.4) 4m(13.1ft) 28(82.4) 26(78.8) 3() 3m(9.8ft) 24 () 3m(9.8ft).5() Heating (ft) 32(89.6) 26(78.8 ) (ft).5(1.6) 28(82.4) 1. 5() 34(93.2) 3() 2.() 1.5(4. 9) (ft) (ft) 1. (3.3 ).5(1. 6) 2.5(8.2) 24() 26(78.8).5() 1. () 1.5() 28(8 2.4 ) (ft) (ft) (ft) (ft) One-Way Ceiling Cassette Product Data.5().5() 1.() 1. ( ).5() 1.( ) 1.() 5m(16.4ft) 4m(13.1ft).5() 3m(9.8ft) (ft) (ft).5() 5m(16.4ft) 4m(13.1ft) 1.( ) 3m(9.8ft) (ft) (ft) Temperature [ C( F)] 3() 3() 3( ) Temperature [ C( F)] 32(89.6) 32(89.6) 32(89.6) 31(8 7.8) 32(89.6) 28(82.4) 26 (7 8.8 ) 24() 22(7) (ft) 33(91.4) 33(91.4) 36(96.8) (ft) 28(82.4) 28( 82.4) 24() (ft) 32(89.6 ) 33(91.4) 34(93.2) 35(95) 36(96. 8) 37( 98.6) 37( 98.6) (ft) 3() 5m(16.4ft) 28(82.4 ) 4m(13.1ft) 3m(9.8ft) 28(82.4) 26(78.8) (ft) (ft) 24() 24( ) The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 5m(16.4ft) 4m(13.1ft) 34(93.2) 3m(9.8ft) 33(91.4) (ft) 36(96.8) (ft) One-Way 35

36 28(82.4).5() One-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU243TTC4 Figure 2: ARNU243TTC4, continued. Discharge angle: 7 Cooling Discharge angle: 7 Heating Air velocity [m/s(ft/s)] Air velocity [m/s(ft/s)] MULTI V Ceiling Cassette Indoor Unit Engineering Manual 5m(16.4ft) 4m(13.1ft) Temperature [ C( F)] 2 () 24() 22 (7) 2( ) 5m(16.4ft) 4m(13.1ft).5( ) 3m(9.8ft) (ft) 22(71. 6) 2() 24() 22(7) 3m(9.8ft) (ft) 2().5() 2( ) 2() 22(7) 2() (ft) 18( 64.4).5() 1.5(4.9) 1.5() (ft) 2.() 18(64.4 ) 18(6 4.4) 2().5() (ft) (ft) (ft) (ft) 5m(16.4ft) 4m(13.1ft) Temperature [ C( F)] 5m(16.4ft) 4m(13.1ft) 28(82.4) 3() 3m(9.8ft) 3m(9.8ft).5() (ft) 3() (ft).5() (ft) 32(89.6) 34(9 3.2) 1.5(4. 9) 3( ) (ft) 36(9 6.8) 34(9 3.2) 2.( ) 32(89.6) (ft) (ft) (ft) (ft) 36 One-Way

37 One-Way Ceiling Cassette Cooling Capacity Tables ARNU73TUC4, ARNU93TUC4, ARNU123TUC4 Table 2: ARNU73TUC4, ARNU93TUC4, ARNU123TUC4 Cooling Capacity Table. Model No. / Capacity Index ARNU73TUC4 / 7.5 ARNU93TUC4 / 9.6 ARNU123TUC4 / 12.3 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) / / / 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). One-Way Ceiling Cassette Product Data One-Way 37

38 One-Way Ceiling Cassette Cooling Capacity Tables ARNU183TTC4, ARNU243TTC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 21: ARNU183TTC4, ARNU243TTC4 Cooling Capacity Table. Model No. / Capacity Index ARNU183TTC4 / 19.1 ARNU243TTC4 / 24.2 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) / / / 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). 38 One-Way

39 One-Way Ceiling Cassette Heating Capacity Tables ARNU73TUC4, ARNU93TUC4, ARNU123TUC4 Table 22: ARNU73TUC4, ARNU93TUC4, ARNU123TUC4 Heating Capacity Table. Indoor Air Temperature ( F DB) Outdoor Air Temp. Model No. / Capacity Index TC TC TC TC TC TC TC TC F DB F WB MBh MBh MBh MBh MBh MBh MBh MBh ARNU73TUC4 / 7.5 ARNU93TUC4 / 9.6 ARNU123TUC4 / 12.3 TC: Total Capacity (MBh) One-Way Ceiling Cassette Product Data One-Way 39

40 One-Way Ceiling Cassette Heating Capacity Tables ARNU183TTC4, ARNU243TTC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 23: ARNU183TTC4, ARNU243TTC4 Heating Capacity Table. Model No. / Outdoor Air Temp Indoor Air Temperature ( F DB) Capacity Index TC TC TC TC TC TC F DB F WB MBh MBh MBh MBh MBh MBh TC MBh TC MBh ARNU183TTC4 / ARNU243TTC4 / Model TC: Total Capacity (MBh). 4 One-Way

41 One-Way Ceiling Cassette Product Data One-Way Ceiling Cassette Optional Accessories Table 24: Optional Accessory for One-Way Ceiling Cassette Indoor Units. Accessory One-Way Ceiling Cassette Grille Kit (One Required) Model Number PT-UUC (For 9 and 12MBh One-Way Indoor Units) PT-UTC (For 18 and 24MBh One-Way Indoor Units) All accessories are sold separately. One-Way 41

42 MULTI V Ceiling Cassette Indoor Unit Engineering Manual 42 One-Way

43 TWO-WAY CEILING CASSETTE Mechanical Specifications on page 44 General Data on page 45 Electrical Data on page 45 External Dimensions on page 46 Electrical Wiring Diagram on page 47 Refrigerant Flow Diagrams on page 49 Acoustic Data on page 5 Air Velocity / Temperature Distribution on page 52 Capacity Tables on page 55 Optional Accessories on page 57

44 Two-Way Ceiling Cassette Mechanical Specifications MULTI V Ceiling Cassette Indoor Unit Engineering Manual Casing The case is designed to mount recessed in the ceiling and has a surface-mounted concentric grille on the bottom of the unit. The unit case is manufactured with coated metal, and cold surfaces are covered with a coated polystyrene insulating material. The case is provided with metal ears designed to support the unit weight on four corners. Ears have pre-punched holes designed to accept field-supplied, all-thread rod hangers. Architectural Filter/Grille The ceiling cassette assembly is provided with an off-white ABS polymeric resin architectural grille with a tapered trim edge and a hinged, spring clip (screw-less) return air filter-grille door. Fan Assembly and Control The indoor unit has two direct-drive, cross flow tangential Sirocco fans made of high strength ABS GP-235 polymeric resin. The fan motor is 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 on 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-speed or auto-speed setting that adjusts the fan speed to simulate natural airflow. Air Filter Return air is filtered with a removable, washable filter with anti-fungal treatment. The unit is also equipped with a plasma filter. Airflow Guide Vanes The architectural grille has two parallel directional slot diffusers each equipped with oscillating motorized guide vanes designed to change the angle airflow is discharged. Discharge range of motion is 4º in an up/down direction. The control algorithm provides the capability of locking guide vanes in a field adjusted fixed position. Microprocessor Controls The unit is provided with an integrated microprocessor controller 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 units 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: 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 For Heat Recovery systems the Auto Changeover setting automatically switches control of the indoor unit between Cooling and Heating modes based on space 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 indoor unit operation when the indoor room temperature falls below set-point temperature. At which point, a signal is sent to the outdoor unit to begin the heating cycle. The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F. Significant airflow is generated when pipe temperature reaches 8 F. The unit is equipped with an infrared receiver designed to communicate with an LG wireless remote controller. In lieu of wireless remote or factory return air thermistor, screw terminals on the microprocessor circuit board accommodate various models of wall-mounted local controllers and or wall-mounted temperature sensors. 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 wall mounted 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 or heating 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, alpha numeric, and provide the service technician with the reason for the code displayed. Condensate Lift/Pump The indoor unit is provided with a factory installed and wired condensate lift/pump capable of providing a minimum 27.5 inch lift from the bottom surface of the unit. The lift pump comes with a safety switch that will shut off the indoor unit if condensate rises too high in the drain pan. Condensate Drain Pan The condensate drain pan is constructed of EPS (expandable polystyrene resin). Coil The indoor unit coil is constructed with grooved design copper tubes with slit coil fins, two (2) rows, twenty (2) fins per inch. 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 Group control High ceiling Hot start Self diagnostics Timer (on / off) Weekly schedule Auto direction / swing (up / down) Fan speed control Jet cool (fast cooling) 44 Two-Way

45 Two-Way Ceiling Cassette General Data / Electrical Data Table 25: Two-Way Ceiling Cassette (TL Frames) Indoor Unit General Data. Model No. ARNU183TLC4 ARNU243TLC4 Cooling Mode Performance Capacity (Btu/h) 19,1 24,2 Power Input 1 (W) 7 7 Heating Mode Performance Capacity (Btu/h) 21,5 27,3 Power Input 1 (W) 7 7 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) 4 / 36 / / 38 / 34 Net Unit Weight (lbs.) Shipping Weight (lbs.) Grille Weight (lbs) Grille 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 Brushless Digitally Controlled/Direct Airflow Rate H/M/L (CFM) 459 / 424 / / 53 / 459 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.) 1 1 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 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 communications cable at any other point. Two-Way Ceiling Cassette Product Data Table 26: Two-Way Ceiling Cassette Indoor Unit Electrical Data. Model Number Voltage Power Supply Power Input (W) Range MCA MOP Rated Amps (A) Hz Volts Phase Cooling Heating ARNU183TLC ARNU243TLC 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. Two-Way 45

46 Two-Way Ceiling Cassette External Dimensions TL Frame Figure 21: ARNU183TLC4, ARNU243TLC4 Dimensions. MULTI V Ceiling Cassette Indoor Unit Engineering Manual 1-7/ / / / /16 Air Outlet Grille Liquid Pipe Connection: 18,: 1/4 24,: 3/8 8-1/8 2-3/4 1-3/ /16 6-7/16 Vapor Pipe Connection: 18,: 1/2 24,: 5/8 5/ /8 3-5/8 8-3/16 2-3/4 4-R5/8 25-1/4 Unit: inches Note: All measurements have a tolerance of 1/4 in. Air Inlet Grille 36-5/16 (Air Outlet Hole) 41-3/8 1-1/8 46 Two-Way

47 Two-Way Ceiling Cassette Product Data Two-Way Ceiling Cassette Electrical Wiring Diagram TL Frame Figure 22: ARNU183TLC4, ARNU243TLC4 Wiring Diagram. Two-Way 47

48 Two-Way Ceiling Cassette Electrical Wiring Diagram TL Frame Table 27: TL Frame Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line input for indoor controller CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC MULTI V Ceiling Cassette Indoor Unit Engineering Manual CN-D/PUMP Drain pump output AC output for drain pump CN-PTC Auxiliary heater Auxiliary heater connection CN-FLOAT Float switch input Float switch sensing CN-EEV EEV Output EEV Control output CN-DISP Display Display of indoor status CN-OPTION Option PCB (EPROM) Option PCB connection CN-ROOM Room sensor Room air thermistor CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-REMO Remote controller Remote control line CN-CC Dry Contact Connection to Dry Contact (Optional) CN-AIRC Air Clean Air Cleaner control CN-VANE1 Step Motor Step motor output CN-485 Communication Connection between indoor and outdoor units CN-COM Communication Connection on Sub PCB between indoor and outdoor units Table 28: TL Frame DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP Master Slave Group Control setting using 7-Day Programmable Controller SW4 DRY CONTACT Variable Auto Dry Contact Mode Setting 1. Variable: Auto/Manual Mode can be chosen by 7-Day Programmable Controller or Wireless Remote Controller (when shipped from factory -> Manual Mode) 2. Auto: For Dry Contact, it is always Auto mode SW5 EXTRA 1 Off On No Function SW8 COMMUNICATIONS RATE Gen. 2 Gen. 4 -OFF: 1.2kbps -ON: 9.6kbps For Multi V systems, DIP switches 1, 2, 6, and 7 must be set to OFF. These DIP switches are used for other models. 48 Two-Way

49 Two-Way Ceiling Cassette Refrigerant Flow Diagram TL Frame Figure 23: TL Piping Diagram. Heat Exchanger EEV Filter Cooling Heating Th3 Th2 C.F.F. Filter Th1 lndoor unit Table 29: TL Frame Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Gas (inch) Refrigerant pipe connection port diameter ARNU183TLC4 1/4 1/2 ARNU243TLC4 3/8 5/8 Table 3: TL Frame Thermistors. Thermistor Description TH1 Return air thermistor TH2 Pipe in thermistor TH3 Pipe out thermistor Two-Way Ceiling Cassette Product Data Two-Way 49

50 Two-Way Ceiling Cassette Acoustic Data Sound Pressure Levels MULTI V Ceiling Cassette Indoor Unit Engineering Manual Figure 24: Sound Pressure Measurement Location. Model feet Microphone Table 31: Two-Way Ceiling Cassette Indoor Unit Sound Pressure Levels. Measurements are taken 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. Sound Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed ARNU183TLC ARNU243TLC Figure 25: ARNU183TLC4 and ARNU243TLC4 Sound Pressure Level Diagrams. ARNU183TLC4 ARNU243TLC4 5 Two-Way

51 Two-Way Cassette Acoustic Data Sound Power Levels Table 32: Two-Way Ceiling Cassette Indoor Unit Sound Power Levels. Model Sound Levels db(a) High Fan Speed ARNU183TLC4 59. ARNU243TLC4 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 Figure 26: ARNU183TLC4 and ARNU243TLC4 Sound Power Level Diagrams. ARNU183TLC4 ARNU243TLC4 Two-Way Ceiling Cassette Product Data Two-Way 51

52 Two-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU183TLC4 Figure 27: ARNU183TLC4. Discharge angle: 2 C ooling Discharge angle: 2 Heating MULTI V Ceiling Cassette Indoor Unit Engineering Manual 1.() 1.5() 1.5().5() 1.().5().5() 13.1 ft ft 13.1 ft 18(64.4) 16(6.8) (6.8) (64.4) 2() 22(7) () 22(7) 24() 24() 13.1 ft ft 13.1 ft C ooling Discharge angle: 4 2.() 2.() 1.5() 1.5() 1.() 1.().5().5() 13.1 ft ft 13.1 ft 1.() 13.1 ft ft 13.1 ft 34(93.2) 1.5().5() 1.5() 1.() 34(93.2) (78.8) 26(78.8) 13.1 ft ft 13.1 ft Discharge angle: 6 1.5() 1.() Heating.5() 1.() 1.5().5() 13.1 ft ft 13.1 ft (77) 25(77) 22(7) 32(89.6) (7) 24() 7 22(7) (77) 24() 3(8.6) 3(8.6) 24() 13.1 ft ft 13.1 ft 13.1 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 52 Two-Way

53 Two-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU183TLC4, ARNU243TLC4 Figure 28: ARNU183TLC4 continued. Discharge angle: 7 C ooling Discharge angle: 7 Heating Figure 29: ARNU243TLC4. C ooling Discharge angle: 2.5() 2.().5() 2.().5() 13.1 ft ft 13.1 ft 1.5() 1.() 16(6.8) (64.4) () 22(7) 22(7) 13.1 ft ft 13.1 ft 13.1 ft ft 13.1 ft ft ft 13.1 ft Discharge angle: 2.5() () Heating.5() Two-Way Ceiling Cassette Product Data 13.1 ft ft 13.1 ft 13.1 ft ft 13.1 ft (78.8) 16(6.8) (78.8) (78.8) 26(78.8) 25(77) 25(77) 24() 24() 13.1 ft ft 13.1 ft 13.1 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. Two-Way 53

54 Two-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU243TLC4 Figure 3: ARNU243TLC4 continued. Discharge angle: 4 C ooling Discharge angle: 6 Heating MULTI V Ceiling Cassette Indoor Unit Engineering Manual (9.8) (8.2) 1.() 1.() 13.1 ft ft 13.1 ft 2() 2() () 24() 13.1 ft ft 13.1 ft C ooling Discharge angle: ft ft 13.1 ft 2.5(8.2) 2.5(8.2) 2.() 2.() 1.5() 1.5() 1.() 1.() 13.1 ft ft 13.1 ft 32(89.6) 32(89.6) 31(87.8) 31(87.8) 3() 3() (8.6) (82.4) (82.4) (78.8).6) (82.4) (82.4) (78.8) 13.1 ft ft 13.1 ft Discharge angle: 7 Heating 1.() 13.1 ft ft 13.1 ft (6.8) (64.4) ft ft 13.1 ft (96.8) ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 54 Two-Way

55 Two-Way Ceiling Cassette Cooling Capacity Tables ARNU183TLC4, ARNU243TLC4 Table 33: ARNU183TLC4, ARNU243TLC4 Cooling Capacity Table. Model No. / Capacity Index ARNU183TLC4 / 19.1 ARNU243TLC4 / 24.2 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) / / / 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). Two-Way Ceiling Cassette Product Data Two-Way 55

56 Two-Way Ceiling Cassette Heating Capacity Tables ARNU183TLC4, ARNU243TLC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 34: ARNU183TLC4, ARNU243TLC4 Heating Capacity Table. Model No. / Outdoor Air Temp Indoor Air Temperature ( F DB) Capacity Index TC TC TC TC TC TC F DB F WB MBh MBh MBh MBh MBh MBh TC MBh TC MBh ARNU183TLC4 / ARNU243TLC4 / 24.2 TC: Total Capacity (MBh) Two-Way

57 Two-Way Ceiling Cassette Product Data Two-Way Ceiling Cassette Optional Accessories Table 35: Optional Accessories for Two-Way Ceiling Cassette Indoor Units. Accessory Two-Way Ceiling Cassette Grille Kit (One Required) Model Number PT-HLC1 All accessories are sold separately. Two-Way 57

58 MULTI V Ceiling Cassette Indoor Unit Engineering Manual 58 Two-Way

59 FOUR-WAY CEILING CASSETTE Mechanical Specifications on page 6 2' x 2' Frame 3' x 3' Frame General Data on page 62 Electrical Data on page 64 External Dimensions on page 65 Electrical Wiring Diagram on page 7 Refrigerant Flow Diagrams on page 74 Acoustic Data on page 75 Air Velocity / Temperature Distribution on page 81 Fresh Air Ventilation on page 98 Capacity Tables on page 1 Optional Accessories on page 17

60 Four-Way Ceiling Cassette Mechanical Specifications Casing The case is designed to mount recessed in the ceiling and has a surface-mounted concentric grille on the bottom of the unit. The unit case is manufactured with coated metal. Cold surfaces are covered with a coated polystyrene insulating material. The case is provided with metal ears designed to support the unit weight on four corners. Ears have pre-punched holes designed to accept field-supplied all-thread rod hangers. MULTI V Ceiling Cassette Indoor Unit Engineering Manual Ventilation Air TQ, TR Frame The case has a factory designated cutout for the connection of a field-supplied outside air duct. An optional flange kit is available from LG. TM, TN, TP Frame The case has a factory designated cutout for the connection of a field-supplied outside air duct. LG offers two flange kits. Supply Air Branch Duct Connections Factory designated cutouts are marked on the unit case. Branch ducts provide the designer with the ability to duct up to ½ the unit airflow capacity to adjacent spaces. The adjacent space must be in the room where the ceiling cassette is installed. It cannot be branched to another room. Architectural Filter/Grille The ceiling cassette assembly is provided with an off-white ABS polymeric resin architectural grille equipped with a tapered trim edge and a hinged, spring clip (screwless) return air filter-grille door. TM, TN, TP Frame The unit case allows access to hanger rods and the inspection of piping through corner access panels on the architectural grille. The optional auto-elevating grille kit is designed to provide motorized ascent/descent of the return air grille/pre-filter assembly a distance of up to 14-3/4 feet allowing easy access to remove and clean the filter. The kit consists of two lifting mechanisms comprised of an electric motor driven winch with braided steel lifting cables. The winch kit is mounted behind the grille and is not visible during normal unit operation. The auto-elevating return air grille appearance and finish matches that of the architectural grille on similar indoor unit models equipped with the standard hinged filter grilles. The auto-elevating grille control algorithm accepts up, down, and stop control commands from either a wall-mounted or the lift remote controller. The algorithm does not permit the lowering of the grille while the indoor unit fan is operating. The pair of winch controllers work in unison to keep the return air grille level during lift and descent operations and will automatically stop the descent of the return air grille/filter if contact is made with any obstacle. Fan Assembly and Control The indoor unit has a single, direct-drive, turbo fan. The fan wheel is made of high strength ABS HT-7 polymeric resin. The fan motor is 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 on 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-speed or auto-speed setting that adjusts the fan speed to simulate natural airflow. Air Filter Return air is filtered with a removable, washable filter with antifungal treatment. Airflow Guide Vanes The architectural grille has four-directional slot diffusers each equipped with independent oscillating motorized guide vanes designed to change the angle airflow is discharged. Discharge range of motion is 4 in an up/down direction. The unit has a guide vane control algorithm designed to sequentially change the predominant discharge airflow direction in a counterclockwise pattern. The control algorithm also provides the capability of locking each guide vane independently in a field adjusted fixed position. Guide vanes provide airflow in all directions. The ends of each vane are tapered to provide airflow to the space in the direction of the four corners of the architectural grille. Microprocessor Controls The unit is provided with an integrated microprocessor controller 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 unit 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, 6 Four-Way

61 Four-Way Ceiling Cassette General Data 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 algorithms provide 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 For Heat Recovery systems the Auto Changeover setting automatically switches control of the indoor unit between cooling and heating modes based on space 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 indoor unit operation when the indoor room temperature falls below setpoint temperature. At which point, a signal is sent to the outdoor unit to begin the heating cycle. The indoor unit fan operation is delayed until coil pipe temperature reaches 76 F. Significant airflow is generated when pipe temperature reaches 8 F. The unit is equipped with an infrared receiver designed to communicate with an LG wireless remote controller. In lieu of wireless remote or factory return air thermistor, screw terminals 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. Condensate Lift/Pump The indoor unit is provided with a factory installed and wired condensate lift/pump capable of providing a minimum 27.5 inch lift from the bottom surface of the unit. The lift pump comes with a safety switch that shuts off the indoor unit if condensate rises too high in the drain pan. Condensate Drain Pan The condensate drain pan is constructed of EPS (expandable polystyrene resin). Coil The indoor unit coil is constructed with grooved design copper tubes with slit coil fins, one (1) to two (2) rows, eighteen (18) to nineteen (19) fins per inch. 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 Group control High ceiling Hot start Self diagnostics Timer (on / off) Weekly schedule Auto direction / swing (up / down) Fan speed control Swirl wind (alternating vanes) Jet cool (fast cooling) Four-Way Ceiling Cassette Product Data 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 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 wall-mounted, local, or central controller, displayed diagnostic codes are specific, alpha numeric, and provide the service technician with the reason for the code displayed. Four-Way 61

62 Four-Way Ceiling Cassette General Data MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 36: Four-Way Ceiling Cassette (2' x 2' Frames) Indoor Unit General Data. Model No. ARNU53TRC4 ARNU73TRC4 ARNU93TRC4 ARNU123TRC4 ARNU153TQC4 ARNU183TQC4 Cooling Mode Performance Capacity (Btu/h) 5,5 7,5 9,6 12,3 15,4 19,1 Power Input 1 (W) Heating Mode Performance Capacity (Btu/h) 6,1 8,5 1,9 13,6 17,1 21,5 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) 29 / 27 / / 27 / 26 3 / 29 / / 3 / / 34 / / 35 / 34 Net Unit Weight (lbs.) Shipping Weight (lbs.) Grille Weight (lbs) Grille Shipping Weight (lbs) Communication Cable 4 (No. x AWG) Fan 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Type Turbo Turbo Turbo Turbo Turbo Turbo Quantity Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) 265 / 247 / / 247 / / 265 / / 283 / / 353 / / 388 / 353 Piping Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 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 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 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 communications cable at any other point. 62 Four-Way

63 Four-Way Ceiling Cassette General Data Table 37: Four-Way Ceiling Cassette (3' x 3' Frames) Indoor Unit General Data. Model No. ARNU243TPC4 ARNU283TPC4 ARNU363TNC4 ARNU423TMC4 ARNU483TMC4 Cooling Mode Performance Capacity (Btu/h) 24,2 28, 36,2 42, 48,1 Power Input 1 (W) Heating Mode Performance Capacity (Btu/h) 27,3 31,5 4,6 43,8 51,2 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 Refrigerant Control EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 36 / 34 / / 35 / / 41 / / 41 / / 42 / 4 Net Unit Weight (lbs.) Shipping Weight (lbs.) Grill Weight (lbs) Grill Shipping Weight (lbs) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Fan Type Turbo Turbo Turbo Turbo Turbo Quantity Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) 6 / 53 / / 565 / / 777 / 76 1,59 / 918 / 812 1,13 / 953 / 883 Piping Liquid Line (in., O.D.) 3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare 3/8 Flare Vapor Line (in., O.D.) 5/8 Flare 5/8 Flare 5/8 Flare 5/8 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 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 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 communications cable at any other point. Four-Way Ceiling Cassette Product Data Four-Way 63

64 Four-Way Ceiling Cassette Electrical Data MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 38: Four-Way Ceiling Cassette (2' x 2' and 3' x 3' Frames) Indoor Unit Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) 2' x 2' Frames ARNU53TRC Power Supply Power Input (W) Hz Volts Phase Cooling Heating 3 3 ARNU73TRC ARNU93TRC ARNU123TRC ARNU153TQC ARNU183TQC ' x 3' Frames ARNU243TPC ARNU283TPC ARNU363TNC ARNU423TMC ARNU483TMC 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 a fuse, use the circuit breaker. 64 Four-Way

65 Four-Way Ceiling Cassette Product Data Four-Way Ceiling Cassette External Dimensions TR Frame Figure 31: ARNU53TRC4, ARNU73TRC4, ARNU93TRC4, ARNU123TRC4 Dimensions. Four-Way 65

66 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Four-Way Ceiling Cassette External Dimensions TQ Frame Figure 32: ARNU153TQC4, ARNU183TQC4 Dimensions. 66 Four-Way

67 Four-Way Ceiling Cassette Product Data Four-Way Ceiling Cassette External Dimensions TP Frame Figure 33: ARNU243TPC4, ARNU283TPC4 Dimensions. Four-Way 67

68 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Four-Way Ceiling Cassette External Dimensions TN Frame Figure 34: ARNU363TNC4 Dimensions. Four-Way

69 Four-Way Ceiling Cassette Product Data Four-Way Ceiling Cassette External Dimensions TM Frame Figure 35: ARNU423TMC4, ARNU483TMC4 Dimensions. Four-Way 69

70 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Four-Way Ceiling Cassette Electrical Wiring Diagram TR and TQ Frames Figure 36: ARNU53TRC4, ARNU73TRC4, ARNU93TRC4, ARNU123TRC4, ARNU153TQC4, ARNU183TQC4 Wiring Diagram. 7 Four-Way

71 Four-Way Ceiling Cassette Electrical Wiring Diagram TR and TQ Frames Table 39: TR / TQ Frame Wiring Diagram Legend. DIP Switch Setting Off On Remarks SW3 GROUP Master Slave Group Control setting using 7-Day Programmable Controller SW4 DRY CONTACT Variable Auto Dry Contact Mode Setting 1. Variable: Auto/Manual Mode can be chosen by 7-Day Programmable Controller or Wireless Remote Controller (when shipped from factory -> Manual Mode) 2. Auto: For Dry Contact, it is always Auto mode. SW5 EXTRA 1 Off On No Function SW8 Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-D/PUMP Drain pump output AC output for drain pump CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-FLOAT (BL) Float switch input Float switch sensing CN-EEV EEV Output EEV control output CN-DISPLAY Display Display of indoor status CN-OPTION Optional PCB EPROM Option PCB connection CN-ROOM (YL) Room sensor Room air thermistor CN-PIPE_IN (WH) Suction pipe sensor Pipe in thermistor CN-PIPE_OUT (RD) Discharge pipe sensor Pipe out thermistor CN-REMO (GN) Wired remote controller Wired remote control connection CN-CC Dry contact Dry Contact connection CN-AIRC Air Clean Air cleaner control CN-VANE1 Step motor Step motor output CN-VANE2 Step motor Step motor output CN-485 Communication Connection between indoor and outdoor units Table 4: TR / TQ Frame DIP Switch Settings. COMMUNICATIONS RATE Gen. 2 Gen. 4 -OFF: 1.2kbps -ON: 9.6kbps For Multi V systems, DIP switches 1, 2, 6, and 7 must be set to OFF. These DIP switches are used for other models. Four-Way Ceiling Cassette Product Data Four-Way 71

72 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Four-Way Ceiling Cassette Electrical Wiring Diagram TP, TN, and TM Frames Figure 37: ARNU243TPC4, ARNU283TPC4, ARNU363TNC4, ARNU423TMC4, ARNU483TMC4 Wiring Diagram. 72 Four-Way

73 Four-Way Ceiling Cassette Electrical Wiring Diagram TP, TN, and TM Frames Table 41: TP, TN, and TM Frame Wiring Diagram Legend. DIP Switch Setting Off On Remarks SW3 GROUP Master Slave Group Control setting using 7-Day Programmable Controller SW4 DRY CONTACT Variable Auto Dry Contact Mode Setting 1. Variable: Auto/Manual Mode can be chosen by 7-Day Programmable Controller or Wireless Remote Controller (when shipped from factory -> Manual Mode) 2. Auto: For Dry Contact, it is always Auto mode. SW5 EXTRA 1 Off On No Function SW8 Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-D/PUMP Drain pump output AC output for drain pump CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-FLOAT (BL) Float switch input Float switch sensing CN-EEV EEV Output EEV control output CN-DISPLAY Display Display of indoor status CN-OPTION Optional PCB EPROM Option PCB connection CN-ROOM Room sensor Room air thermistor CN-PIPE_IN Suction pipe sensor Pipe in thermistor CN-PIPE_OUT Discharge pipe sensor Pipe out thermistor CN-CC Dry contact Dry Contact connection CN-HVB HVB Assembly Air cleaner control CN-VANE1 Step motor Step motor output CN-VANE2 Step motor Step motor output CN-485 Communication Connection between indoor and outdoor units CN-REMO Wired remote controller Wired remote control connection CN-GRILL Elevation grille Elevation grille connection Table 42: TP, TN, and TM Frame DIP Switch Settings. COMMUNICATIONS RATE Gen. 2 Gen. 4 -OFF: 1.2kbps -ON: 9.6kbps For Multi V systems, DIP switches 1, 2, 6, and 7 must be set to OFF. These DIP switches are used for other models. Four-Way Ceiling Cassette Product Data Four-Way 73

74 Four-Way Ceiling Cassette Refrigerant Flow Diagram TR, TQ, TP, TN, TM Frames MULTI V Ceiling Cassette Indoor Unit Engineering Manual Figure 38: TR, TQ, TP, TN, TM Frame Piping Diagram. Heat Exchanger EEV Filter TH3 TH2 Turbo Fan Filter TH1 lndoor unit Table 43: TR, TQ, TP, TN, TM Frame Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Vapor (inch) 2' x 2' Frames ARNU53TRC4 ARNU73TRC4 ARNU93TRC4 ARNU123TRC4 ARNU153TQC4 ARNU183TQC4 3' x 3' Frames ARNU243TPC4 1/4 Flare 1/2 Flare ARNU283TPC4 ARNU363TNC4 ARNU423TMC4 ARNU483TMC4 3/8 Flare 5/8 Flare Cooling Heating Table 44: TR, TQ, TP, TN, TM Frame Thermistors. Thermistor Description TH1 Return air thermistor TH2 Pipe in thermistor TH3 Pipe out thermistor 74 Four-Way

75 Four-Way Ceiling Cassette Acoustic Data Sound Pressure Levels Figure 39: Sound Pressure Measurement Location. Ceiling Measurements are taken 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. ft. Microphone Table 45: Four-Way Ceiling Cassette Indoor Unit Sound Pressure Levels. Model Sound Pressure Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed 2' x 2' Frames ARNU53TRC ARNU73TRC ARNU93TRC ARNU123TRC ARNU153TQC ARNU183TQC ' x 3' Frames ARNU243TPC ARNU283TPC ARNU363TNC ARNU423TMC ARNU483TMC Figure 4: ARNU53TRC4, ARNU73TRC4, and ARNU93TRC4 Sound Pressure Level Diagrams. ARNU53TRC4 ARNU73TRC4 ARNU93TRC4 Four-Way Ceiling Cassette Product Data Four-Way 75

76 Four-Way Ceiling Cassette Acoustic Data Sound Pressure Levels Figure 41: ARNU123TRC4, ARNU153TQC4, and ARNU183TQC4 Sound Pressure Level Diagrams. ARNU123TRC4 ARNU153TQC4 ARNU183TQC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Figure 42: ARNU243TPC4, ARNU283TPC4, and ARNU363TNC4 Sound Pressure Level Diagrams. ARNU243TPC4 ARNU283TPC4 ARNU363TNC4 76 Four-Way

77 Four-Way Ceiling Cassette Product Data Four-Way Ceiling Cassette Acoustic Data Sound Pressure Levels Figure 43: ARNU423TMC4 and ARNU483TMC4 Sound Pressure Level Diagrams. ARNU423TMC4 ARNU483TMC4 Four-Way 77

78 Four-Way Ceiling Cassette Acoustic Data Sound Power Levels MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 46: Four-Way Ceiling Cassette Indoor Unit Sound Power Levels. Model Sound Power Levels db(a) High Fan Speed 2' x 2' Frames ARNU53TRC4 46. ARNU73TRC4 46. ARNU93TRC4 47. ARNU123TRC4 48. ARNU153TQC4 51. ARNU183TQC ' x 3' Frames ARNU243TPC4 55. ARNU283TPC4 56. ARNU363TNC4 62. ARNU423TMC4 63. ARNU483TMC4 65. 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 Figure 44: ARNU53TRC4, ARNU73TRC4, and ARNU93TRC4 Sound Power Level Diagrams. ARNU53TRC4 ARNU73TRC4 ARNU93TRC4 78 Four-Way

79 Four-Way Ceiling Cassette Acoustic Data Sound Power Levels Figure 45: ARNU123TRC4, ARNU153TQC4, and ARNU183TQC4 Sound Power Level Diagrams. ARNU123TRC4 ARNU153TQC4 ARNU183TQC4 Figure 46: ARNU243TPC4, ARNU283TPC4, and ARNU363TNC4 Sound Power Level Diagrams. ARNU243TPC4 ARNU283TPC4 ARNU363TNC4 Four-Way Ceiling Cassette Product Data Four-Way 79

80 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Four-Way Ceiling Cassette Acoustic Data Sound Power Levels Figure 47: ARNU423TMC4 and ARNU483TMC4 Sound Power Level Diagrams. ARNU423TMC4 ARNU483TMC4 8 Four-Way

81 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU53TRC4 Figure 48: ARNU53TRC4. C o o lin g Discharge angle: 2 Discharge angle: 2 H eatin g 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft Discharge angle: 4 C o o lin g ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft Discharge angle: 5 H eatin g Four-Way Ceiling Cassette Product Data 8.2 ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. Four-Way 81

82 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU53TRC4, ARNU73TRC4 Figure 49: ARNU53TRC4, continued. C o o lin g Discharge angle: 7 Discharge angle: 7 H eatin g MULTI V Ceiling Cassette Indoor Unit Engineering Manual ft ft ft ft 8.2 ft Figure 5: ARNU73TRC ft ft ft ft 8.2 ft Discharge angle: C o o lin g ft ft ft ft 8.2 ft Temperature( F) ft ft ft ft 8.2 ft Discharge angle: 2 H eatin g ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 82 Four-Way

83 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU73TRC4 Figure 51: ARNU73TRC4, continued. C o o lin g Discharge angle: 4 Discharge angle: 5 H eatin g 8.2 ft ft ft ft 8.2 ft Discharge angle: ft ft ft ft 8.2 ft C o o lin g ft ft ft ft 8.2 ft Discharge angle: ft ft ft ft 8.2 ft H eatin g Four-Way Ceiling Cassette Product Data ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. Four-Way 83

84 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU93TRC4 Figure 52: ARNU93TRC4. C o o lin g H eatin g Discharge angle: 2 Discharge angle: 2 MULTI V Ceiling Cassette Indoor Unit Engineering Manual 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft Discharge angle: C o o lin g 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft Discharge angle: 5 H eatin g 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 84 Four-Way

85 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU93TRC4, ARNU123TRC4 Figure 53: ARNU93TRC4, continued C o o lin g Discharge angle: 7 Discharge angle: 7 H eatin g Figure 54: ARNU123TRC ft ft ft ft 8.2 ft Discharge angle: ft ft ft ft 8.2 ft 73.4 C o o lin g ft ft ft ft 8.2 ft Discharge angle: ft ft ft ft 8.2 ft H eatin g Four-Way Ceiling Cassette Product Data 8.2 ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. Four-Way 85

86 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU123TRC4 Figure 55: ARNU123TRC4, continued C o o lin g H eatin g Discharge angle: 4 Discharge angle: 5 MULTI V Ceiling Cassette Indoor Unit Engineering Manual 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft Discharge angle: 7 C o o lin g 8.2 ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft ft ft ft ft 8.2 ft Discharge angle: H eatin g ft ft ft ft 8.2 ft ft ft ft ft ft 8.2 ft 8.2 ft ft ft ft 8.2 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. Four-Way

87 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU153TQC4 Figure 56: ARNU153TQC4. C o o lin g H eatin g Discharge angle: 2 Discharge angle: ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft Discharge angle: C o o lin g 13.1 ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft Discharge angle: ft 9.8 ft ft 13.1 ft H eatin g 13.1 ft 9.8 ft ft 13.1 ft Four-Way Ceiling Cassette Product Data ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. Four-Way 87

88 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU153TQC4, ARNU183TQC4 Figure 57: ARNU153TQC4, continued. C o o lin g Discharge angle: 7 Discharge angle: 7 H eatin g MULTI V Ceiling Cassette Indoor Unit Engineering Manual 13.1 ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft Figure 58: ARNU183TQC4. Discharge angle: 2 C o o lin g ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft Discharge angle: ft 9.8 ft ft 13.1 ft H eatin g ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. 88 Four-Way

89 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU183TQC4 Figure 59: ARNU183TQC4, continued. C o o lin g Discharge angle: 4 Discharge angle: 5 H eatin g Discharge angle: ft 9.8 ft ft 13.1 ft 64.4 C o o lin g ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft Discharge angle: ft 9.8 ft ft 13.1 ft H eatin g 21(69.8) ft 9.8 ft ft 13.1 ft 91.4 Four-Way Ceiling Cassette Product Data ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. Four-Way 89

90 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU243TPC4 Figure 6: ARNU243TPC4. C o o lin g Discharge angle: 2 Discharge angle: 2 H eatin g MULTI V Ceiling Cassette Indoor Unit Engineering Manual 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 9.8 ft ft 13.1 ft Discharge angle: 4 C o o lin g 13.1 ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft Discharge angle: 5 H eatin g ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. C o o lin g H eatin g Discharge angle: 7 Discharge angle: 7 9 Four-Way

91 Four-Way Ceiling Cassette ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft Air Velocity / Temperature Distribution ARNU243TPC4, ARNU283TPC4 Figure 61: ARNU243TPC4, continued. C o o lin g Discharge angle: 7 Discharge angle: 7 H eatin g ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft Figure 62: ARNU283TPC4. C o o lin g Discharge angle: Discharge angle: H eatin g Four-Way Ceiling Cassette Product Data 13.1 ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. C o o lin g H eatin g Discharge angle: 4 LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. Discharge LG angle: is a registered 5 trademark of LG Corp. Four-Way 91

92 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution 13.1 ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft ARNU283TPC Figure 63: ARNU283TPC4, continued. C o o lin g H eatin g Discharge angle: 4 Discharge angle: 5 MULTI V Ceiling Cassette Indoor Unit Engineering Manual ft 9.8 ft ft 13.1 ft ft ft 9.8 ft ft 13.1 ft ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft Discharge angle: ft 9.8 ft ft 13.1 ft C o o lin g Discharge angle: ft 9.8 ft ft 13.1 ft H eatin g ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan C o o lin g H eatin g operating mode. Discharge angle: 2 Discharge angle: 2 92 Four-Way

93 Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU363TNC ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft Figure 64: ARNU363TNC4. C o o lin g Discharge angle: 2 Discharge angle: 2 H eatin g ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Discharge angle: 4 C o o lin g ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Discharge angle: H eatin g ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Four-Way Ceiling Cassette Product Data ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft C o o lin g H eatin g The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan Discharge angle: 7 Discharge angle: 7 operating mode Four-Way 93

94 Four-Way 7 Ceiling 7 Cassette Air Velocity 13.1 ft 9.8 ft/ Temperature 16.4 ft ft Distribution 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ARNU363TNC4, ARNU423TMC4 Figure 65: ARNU363TNC4, continued. C o o lin g Discharge angle: 7 Discharge angle: 7 H eatin g MULTI V Ceiling Cassette Indoor Unit Engineering Manual 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Figure 66: ARNU423TMC2. C o o lin g ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Discharge angle: 2 Discharge angle: ft 9.8 ft ft 13.1 ft ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 9.8 ft ft 13.1 ft 91.4 H eatin g ft ft ft 13.1 ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. C o o lin g H eatin g Discharge angle: 4 Discharge angle: 5 94 Four-Way LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. Air All velocity rights reserved. ft/s LG is a registered trademark of LG Corp.

95 1.5 ft 1.5 ft Four-Way Ceiling Cassette Air Velocity / Temperature Distribution 13.1 ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft ARNU423TMC4 Figure 67: ARNU423TMC2, continued. Discharge angle: 4 C o o lin g Discharge angle: 5 H eatin g ft ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Discharge angle: 7 Discharge angle: 7 C o o lin g ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft H eatin g 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 1.5 ft Four-Way Ceiling Cassette Product Data 1.5 ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 1.5 ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. C o o lin g H eatin g Discharge angle: 2 Discharge angle: 2 LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. Air velocity LG is a ft/s registered trademark of LG Corp. Four-Way 95

96 1.5 ft 1.5 ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Four-Way Ceiling Cassette Air Velocity / Temperature Distribution ARNU483TMC4 Figure : ARNU483TMC4. C o o lin g Discharge angle: 2 Discharge angle: 2 H eatin g MULTI V Ceiling Cassette Indoor Unit Engineering Manual ft 9.8 ft ft 13.1 ft ft 1.5 ft 13.1 ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft 13.1 ft 9.8 ft ft 13.1 ft Discharge angle: ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft C o o lin g Discharge angle: ft 1.5 ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft H eatin g 1.5 ft 1.5 ft ft ft ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft The standard Discharge angle: setup 7 height is. The charts above show the measurement Discharge angle: distribution 7 at the ceiling height of with a high fan operating mode. 96 Four-Way C o o lin g H eatin g 1.5 ft 1.5 ft

97 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Figure 69: ARNU483TMC4, continued. C o o lin g ft Four-Way Ceiling Cassette ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft Air Velocity / Temperature Distribution H eatin g 1.5 ft ARNU483TMC4 Discharge angle: 7 Discharge angle: ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 1.5 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft 16.4 ft 13.1 ft 9.8 ft ft 13.1 ft 16.4 ft ft 1.5 ft Four-Way Ceiling Cassette Product Data The standard setup height is. The charts above show the measurement distribution at the ceiling height of with a high fan operating mode. Four-Way 97

98 Four-Way Ceiling Cassette Fresh Air Ventilation TR, TQ Frame Figure 7: TR Frame Fresh Air Ventilation. Fresh Air Ventilation (with PTVK43) MULTI V Ceiling Cassette Indoor Unit Engineering Manual P (inaq) Q (CFM) Figure 71: TQ Frame Fresh Air Ventilation. P (inaq) Fresh Air Ventilation (with PTVK43) TR TQ Q (CFM) 98 Four-Way

99 Four-Way Ceiling Cassette Fresh Air Ventilation TP, TN, TM Frame Figure 72: TP, TN and TM Frame Fresh Air Ventilation with PTVK43 Accessory. Fresh Air Ventilation (with PTVK43) P (inaq) TP/TN/TM Q (CFM) Figure 73: TP, TN and TM Frame Fresh Air Ventilation with PTVK41 + PTVK42 Accessories. Fresh Air Ventilation (with PTVK41 + PTVK42) Four-Way Ceiling Cassette Product Data P (inaq) TP/TN/TM Q (CFM) Four-Way 99

100 Four-Way Ceiling Cassette Cooling Capacity Tables ARNU53TRC4, ARNU73TRC4, ARNU93TRC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 47: ARNU53TRC4, ARNU73TRC4, ARNU93TRC4 Cooling Capacity Table. Model No. / Capacity Index ARNU53TRC4 / 5.5 ARNU73TRC4 / 7.5 ARNU93TRC4 / 9.6 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) / / / 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). 1 Four-Way

101 Four-Way Ceiling Cassette Cooling Capacity Tables ARNU123TRC4, ARNU153TQC4, ARNU183TQC4 Table 48: ARNU123TRC4, ARNU153TQC4, ARNU183TQC4 Cooling Capacity Table. Model No. / Capacity Index ARNU123TRC4 / 12.3 ARNU153TQC4 / 15.4 ARNU183TQC4 / 19.1 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) / / / 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). Four-Way Ceiling Cassette Product Data Four-Way 11

102 Four-Way Ceiling Cassette Cooling Capacity Tables ARNU243TPC4, ARNU283TPC4, ARNU363TNC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 49: ARNU243TPC4, ARNU283TPC4, ARNU363TNC4 Cooling Capacity Table. Model No. / Capacity Index ARNU243TPC4 / 24.2 ARNU283TPC4 / 28. ARNU363TNC4 / 36.2 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) / / / 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). 12 Four-Way

103 Four-Way Ceiling Cassette Cooling Capacity Tables ARNU423TMC4, ARNU483TMC4 Table 5: ARNU423TMC4, ARNU483TMC4 Cooling Capacity Table. Model No. / Capacity Index ARNU423TMC4 / 42. ARNU483TMC4 / 48.1 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) / / / 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). Four-Way Ceiling Cassette Product Data Four-Way 13

104 Four-Way Ceiling Cassette Heating Capacity Tables ARNU53TRC4, ARNU73TRC4, ARNU93TRC4, ARNU123TRC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 51: ARNU53TRC4, ARNU73TRC4, ARNU93TRC4, ARNU123TRC4 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 ARNU53TRC4 / 5.5 ARNU73TRC4 / 7.5 ARNU93TRC4 / 9.6 ARNU123TRC4 / 12.3 TC: Total Capacity (MBh) Four-Way

105 Four-Way Ceiling Cassette Heating Capacity Tables ARNU153TQC4, ARNU183TQC4, ARNU243TPC4, ARNU283TPC4 Table 52: ARNU153TQC4, ARNU183TQC4, ARNU243TPC4, ARNU283TPC4 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 ARNU153TQC4 / 15.4 ARNU183TQC4 / 19.1 ARNU243TPC4 / 24.2 ARNU283TPC4 / 28. TC: Total Capacity (MBh) Four-Way Ceiling Cassette Product Data Four-Way 15

106 Four-Way Ceiling Cassette Heating Capacity Tables ARNU363TNC4, ARNU423TMC4, ARNU483TMC4 MULTI V Ceiling Cassette Indoor Unit Engineering Manual Table 53: ARNU363TNC4, ARNU423TMC4, ARNU483TMC4 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 ARNU363TNC4 / 36.2 ARNU423TMC4 / 42. ARNU483TMC4 / 48.1 TC: Total Capacity (MBh) Four-Way

107 Four-Way Ceiling Cassette Optional Accessories Table 54: Optional Accessories for Four-Way Ceiling Cassette Indoor Units. Accessory Model Number Four-Way Ceiling Cassette Grille Kit (One Required) PT-UQC (For 5~19MBh Four-Way Indoor Units) PT-UMC (For 24~48MBh Four-Way Indoor Units) Ventilation Kit 1 Ventilation Kit 2 Auto Elevation Kit 1 Cassette Decorative Cover 2 1 For use with TP, TN and TM frame four-way ceiling-cassette indoor units. 2 For use with all four-way ceiling-cassette indoor units. All accessories are sold separately. PTVK41 + PTVK42 PTVK43 PTEGM PTDCM (For 5~19MBh Four-Way Indoor Units) PTDCQ (For 24~48MBh Four-Way Indoor Units) Four-Way Ceiling Cassette Product Data Four-Way 17

108 MULTI V Ceiling Cassette Indoor Unit Engineering Manual 18 Four-Way

109 APPLICATION GUIDELINES Selecting the Best Location on page 11 General Mounting on page 111 General Drain Piping Information on page 112 Wiring Guidelines on page 114 Wired Controller Location on page 116 Acronyms on page 117

110 Application Guidelines Selecting the Best Location Selecting the Best Location Do s Place the unit where air circulation will not be blocked. Figure 74: Selecting the Best Location / Minimum Clearance Requirements One-, Two-, and Four-Way Ceiling-Cassette Indoor Units. * Four-Way TQ/TR Frames MULTI V Ceiling Cassette Indoor Unit Engineering Manual 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 space from the ceiling and floor. Ensure there is sufficient maintenance space. Locate the indoor unit in a location where it can be easily connected to the outdoor unit / heat recovery unit. 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 pump 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. 1-3/16 ± 1/8 * Four-Way TP/TN/TM Frames 19/32 ±1/8 Ceiling Ceiling Tile 19-11/16 or more A One- and Two-Way: 98-7/16 to /16 inches Four-Way <36, Btu/h: 7-7/8 to /32 inches Four-Way >36, Btu/h: 7-7/8 to /32 inches 13/32 or more 39-3/8 or more A Floor Figure 75: Installing Near a Heat or Steam Source. One-Way Only: 7-7/8 or more Ceiling Tile 19-11/16 or more 11-13/16 or less If the unit is installed near a body of water, the installation parts are at risk of corroding. Appropriate anti-corrosion methods should be taken for the unit and all installation parts. Indoor Unit Include enough distance Heat or steam source Unit: Inch Install a ventilation fan with sufficient capacity The unit may be damaged, may malfunction, and / or will not operate as designed if installed in any of the conditions listed. 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. 11 Guidelines

111 Application Guidelines General Mounting General Mounting The ceiling should be strong and solid enough to protect the unit from vibration. All ceiling-cassette indoor units include a pattern to help determine the size necessary for the opening in the false ceiling (paper pattern dimensions match those for the ceiling opening dimensions), and where the hanging bolts and refrigerant / drain piping should be placed. Figure 76: Ceiling Opening / Hanging Bolt Locations for One-Way Ceiling Cassette Indoor Units. 4-1/2 (Ceiling Opening) Figure 77: Ceiling Opening / Hanging Bolt Locations for Two-Way Ceiling Cassette Indoor Units. 39-3/4 (Ceiling opening) 2-1/4 36-3/16 (Hanging bolt) 33-7/ /8 35-3/16 (Hanging bolt) 32-11/16 2-3/ /16 (Ceiling opening) 16-1/8 2-1 / /16 (Hanging bolt) 2-1 /16 TQ,TR Frame 2-3/8~26 (Ceiling opening) 23-5/18 (Ceiling opening) 21-11/16 19 (Hanging bolt) Unit: Inch Figure 78: Ceiling Opening / Hanging Bolt Locations for Four-Way Ceiling Cassette Indoor Units. TM,TN,TP Frame 34-7/16 (Ceiling opening) Unit: Inch Application Guidelines 23 (Hanging bolt) 3-15/16 (Hanging bolt) 2-9/ / /16 Unit size 22-7/16 Unit size (Hanging bolt) /8~26 (Ceiling opening) 26-7/ /16 Unit size 33-1/16 Unit size 26-15/16 (Hanging bolt) 34-7/16 (Ceiling opening) 18-1/8 Unit: Inch Unit: Inch Guidelines 111

112 Application Guidelines General Mounting / General Drain Piping Information MULTI V Ceiling Cassette Indoor Unit Engineering Manual General Mounting Procedure 1. Using the included paper pattern, select and mark the area where the hanging bolts, refrigerant and condensate piping should be placed. The hanging bolts should be slightly tilted to the direction of the drain hose. 2. Drill the holes. 3. Install the unit horizontally using a level gauge. 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 8: Hanging Bolt Installation. Hanging bolt (W3/8 or M1) Nut (W3/8 or M1) Spring washer (M1) The following parts are field supplied: Hanging bolt - W-3/8 or 1/2 Nut - W-3/8 or M1 Spring washer - M1 General Drain Piping Information All ceiling-cassette indoor units generate water during cooling operation, therefore, properly handling this condensation must be considered. Ceiling-cassette indoor units include factory-installed drain pumps. 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. Flexible Drain Hose Ceiling-cassette indoor units include a factory-provided flexible drain hose (with two clamps) to connect the indoor unit to the drain piping / drain piping system. 112 Guidelines Keep the length of the bolt from the bracket to 1-1/2 inches Flat washer for M1 (accessory) Flat washer for M1 (accessory) Nut (W3/8 or M1) Ceiling board Bottom align Included with the indoor unit: Flat washer - M1 Figure 82: Flexible Drain Hose Connection. Paper pattern for installation Ceiling Air Conditioner body Leave about 19/32 inches (TM/TN/TP) or 1-7/32~1-11/32 inches (TQ/TR) between the bottom surface of the indoor unit and the ceiling surface. Table 55: Ceiling-Cassette Indoor Unit Drainage Specifications. Indoor Unit Drain Type Drain Pipe Dia. (OD / ID, in.) One-Way Ceiling Cassette Two-Way Ceiling Cassette Four-Way Ceiling Cassette Metal clamp Drain pump Max /16 inches PVC Elbow Insulation 27-1/2 in. Lift Drain Pump, Factory Installed Clamp the Flexible Drain Hose Connection Figure 79: Using the Paper Pattern / Drilling Holes for the Bolts, Refrigerant and Condensate Piping. Set screw of paper pattern (4 pieces) Open the ceiling board along the outer edge of the paper pattern Hanger distance ~ feet PVC Piping Flexible drain hose Ceiling One-Way TT/TU Frames: 2-3/16 inches Two-Way TL Frames: 3-9/16 inches Four-Way TQ/TR Frames: 4-1/8 inches Four-Way TM/TN/TP Frames: 4-1/4 inches Ceiling board 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. Figure 81: Ceiling-Cassette Indoor Unit Drain Pump to Drain Piping System. Hanger Bracket 1/5~1/1 slope Ø1-1/4 / Ø1

113 APPLICATION GUIDELINES General Drain Piping Information 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. The outside diameter of the drain connection on the indoor unit is 1-1/4 inches. Drain piping material is polyvinyl chloride pipe (1 inch). Figure 83: Drain Piping Slope. Pipe clamp Indoor unit Upward routing not allowed To prevent reversal flow, do not provide up and down slope. Drain Leak Test A leak test should be performed 24 hours after the drainage system has been installed. Maintenance drain port Figure 84: Properly Insulating the Drainage Piping. 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, drain piping, and power wiring / communication cables are properly supported with anchor bolts and clamp hangers positioned at to foot intervals. 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. Insulation Not Required Insulation Requir ed Figure 85: 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]). Properly Fitting Insulation Position the vent down to prevent debris from entering the system Common vertical drain pipe Include trap at the end. 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. Application Guidelines Guidelines 113

114 Application Guidelines Wiring Guidelines MULTI V Ceiling Cassette Indoor Unit Engineering Manual 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 communications 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 : Location of Power Wiring / Communications Cable Terminals in the One-Way Ceiling-Cassette Indoor Unit. Figure 87: Location of Power Wiring / Communications Cable Terminals in the Two-Way Ceiling-Cassette Indoor Unit. Lock nut Conduit Conduit mounting plate 1(L1) 2(L2) 3(A) 4(B) 1(L1) 2(L2) 3(A) 4(B) Power Supply High Voltage (28/23V) Communications Power Supply High Voltage (28/23V) Communications Lock nut Conduit 114 Guidelines