DUCTED INDOOR UNIT ENGINEERING MANUAL

Transcription

1 EM_MultiV_Ducted_IndoorUnits_4_16 DUCTED INDOOR UNIT ENGINEERING MANUAL High Static Ducted 7,500 to 95,900 Btu/h Low Static Ducted 7,500 to 24,000 Btu/h Low Static Built In Ducted 7,500 to 24,200 Btu/h Vertical / Horizontal Air Handler 12,000 to 54,000 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 LATS Overview... 5 High Static Ducted Indoor Units Low Static Ducted Indoor Units Vertical / Horizontal Air Handler Units Application Guidelines Acronyms Introduction Built In Indoor Units TABLE OF SYMBOLS DANGER CAUTION INTRODUCTION 3

4 UNIT NOMENCLATURE ARN U 07 3 TN C 4 Family ARN = Multi V Indoor Unit (Refrigerant R410A) MULTI V Ducted Indoor Unit Engineering Manual Type U = DC Inverter Heat Pump Indoor Unit Nominal Capacity 05 = 5,000 Btu/h 18 = 18,000 Btu/h 07 = 7,000 Btu/h 24 = 24,000 Btu/h 09 = 9,000 Btu/h 28 = 28,000 Btu/h 12 = 12,000 Btu/h 30 = 30,000 Btu/h 15 = 15,000 Btu/h 36 = 36,000 Btu/h Electrical Ratings 3 = V/60Hz/1Ph /1P 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) Feature A, C, L, R = Standard* G = Low Static 42 = 42,000 Btu/h 48 = 48,000 Btu/h 54 = 54,000 Btu/h 76 = 76,000 Btu/h 96 = 96,000 Btu/h L1 = Ducted (low static) L2 = Ducted (low static) L3 = Ducted (low static) NJ = Vertical/Horizontal Air Handling Unit NK = Vertical/Horizontal Air Handling Unit SB = Wall Mounted / Art Cool Mirror SC = Wall Mounted / Art Cool Mirror TT = 1-Way Ceiling Cassette TU = 1-Way Ceiling Cassette U = Uncased TL = 2-Way Ceiling Cassette TM = 4-Way Ceiling Cassette TN = 4-Way Ceiling Cassette TP = 4-Way Ceiling Cassette TQ = 4-Way Ceiling Cassette TR = 4-Way Ceiling Cassette VE = Convertible Surface Mounted VJ = Ceiling Suspended Generation 2 = Second 4 = Fourth A = Second, Revision A 4 INTRODUCTION

5 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. 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. Introduction 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. INTRODUCTION 5

6 MULTI V Ducted Indoor Unit Engineering Manual 6 INTRODUCTION

7 CEILING-CONCEALED DUCTED HIGH STATIC Mechanical Specifications on page 8 General Data on page 9 Electrical Data on page 14 External Dimensions on page 15 Electrical Wiring Diagrams on page 19 Refrigerant Flow Diagrams on page 27 External Static Pressure and Air Flow on page 29 External Static Pressure Ranges on page 33 Acoustic Data on page 37 Capacity Tables on page 47 Optional Accessories on page 63

8 DUCTED HIGH STATIC MULTI V Ducted Indoor Unit Engineering Manual Casing The case is designed to mount concealed above a finished ceiling. Fan supply air is front horizontal with a dedicated rear horizontal return. The unit is manufactured with coated metal. Cold surfaces are covered with a coated polystyrene insulating material. The cold surface areas of the case are covered externally with sheet insulation made of Ethylene Propylene Diene Monomer (M-Class) (EPDM) conforming to ASTM Standard D The case is provided with hanger brackets designed to support the unit weight on four corners. Hanger brackets have pre-punched holes designed to accept field supplied, all-thread rod hangers. Fan Assembly and Control The unit has Sirocco fans made of high strength ABS GP-2200 polymeric resin. Fans are directly driven and mounted on a common shaft. 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 and DIP switch settings will allow the fan to run constantly during defrost or oil return modes. Each setting can be field adjusted from the factory setting (RPM / ESP) to compensate for additional resistance to airflow caused by field connected ductwork or other airflow restricting devices. Air Filter Return air is filtered with a removable, washable filter with antifungal treatment. MERV 13 filter modules with plenums available. Microprocessor Controls The unit is provided with an integrated microprocessor-based controller. The controller is capable of performing functions necessary to operate the system without the use of a wall-mounted controller. A temperature thermistor is factory-mounted in the return air stream. All unit operation parameters, excluding the 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, 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. 8 HIGH STATIC In Heating mode, the microprocessor control will activate the indoor unit when indoor room temperature falls below setpoint temperature and signals the outdoor unit to begin heating cycle. The indoor unit fan operation is delayed until coil pipe temperature reaches 76ºF. Significant airflow is generated when pipe temperature reaches 80 F. In lieu of 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 is provided with a factory installed and wired condensate lift/pump capable of providing a minimum 27.5 inch lift from the bottom exterior surface of the unit casing. The unit drain pan is provided with a secondary drain port/plug allowing the pan to be drained for service. The lift pump comes with a safety switch that will shut off indoor unit if condensate rises too high in the drain pan. Condensate Drain Pan The condensate drain pan is constructed of high impact polystyrene resin (HIPS). Coil The indoor unit coil is constructed with grooved design copper tubes with slit coil fins, two (2) to three (3) rows, nineteen (19) to twenty-one (21) fins per inch. Controls Features Auto changeover (Heat Recovery only) Auto operation Auto restart External on/off control Dual thermistor control Dual setpoint control* Filter life and power consumption display* Multiple auxiliary heater applications* Group control External static pressure control Hot start Self diagnostics Timer (on / off) Weekly schedule Fan speed control Ventilation (outside air) -

9 DUCTED HIGH STATIC General Data Table 1: Ducted High Static (BH Frame) Indoor Unit General Data. Model No. ARNU073BHA4 ARNU093BHA4 ARNU123BHA4 ARNU153BHA4 ARNU183BHA4 ARNU243BHA4 Capacity (Btu/h) 7,500 9,600 12,300 15,400 19,100 24,200 Power Input 1 (W) Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 27,300 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A R410A R410A R410A Refrigerant Control EEV EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 34 / 33 / / 34 / / 35 / / 37 / / 38 / / 41 / 40 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 258 / 222 / / 222 / / 258 / / 357 / / 413 / / 519 / 445 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 230 / 205 / / 230 / / 286 / / 339 / / 399 / / 509 / 459 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare Condensate Line (in., I.D.) Ducted High Static 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 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. HIGH STATIC 9

10 DUCTED HIGH STATIC General Data MULTI V Ducted Indoor Unit Engineering Manual Table 2: Ducted High Static (BG Frame) Indoor Unit General Data. Model No. ARNU073BGA4 ARNU093BGA4 ARNU123BGA4 ARNU153BGA4 ARNU183BGA4 Capacity (Btu/h) 7,500 9,600 12,300 15,400 19,100 Power Input 1 (W) Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A R410A R410A Refrigerant Control EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 35 / 35 / / 35 / / 35 / / 36 / / 39 / 37 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 516 / 484 / / 484 / / 533 / / 427 / / 470 / 427 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 441 / 406 / / 406 / / 427 / / 417 / / 487 / 417 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) 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 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. 10 HIGH STATIC

11 DUCTED HIGH STATIC General Data Table 3: Ducted High Static (BG Frame) Indoor Unit General Data, continued. Model No. ARNU243BGA4 ARNU283BGA4 ARNU363BGA4 ARNU423BGA4 Capacity (Btu/h) 24,200 28,000 36,200 42,000 Power Input 1 (W) Capacity (Btu/h) 27,300 31,500 40,600 43,800 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A R410A Refrigerant Control EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 42 / 39 / / 41 / / 43 / / 44 / 44 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 671 / 576 / / 770 / 622 1,003 / 894 / 770 1,130 / 1,003 / 961 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 671 / 537 / / 851 / 770 1,141 / 1,024 / 894 1,218 / 1,141 / 1,084 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) Liquid Line (in., O.D.) 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 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 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. Ducted High Static HIGH STATIC 11

12 DUCTED HIGH STATIC General Data MULTI V Ducted Indoor Unit Engineering Manual Table 4: Ducted High Static (BR Frames) Indoor Unit General Data. Model No. ARNU283BRA4 ARNU363BRA4 ARNU423BRA4 ARNU483BRA4 ARNU543BRA4 Capacity (Btu/h) 28,000 36,200 42,000 48,100 54,000 Power Input 1 (W) Capacity (Btu/h) 31,500 40,600 43,800 51,200 61,400 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A R410A R410A Refrigerant Control EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 41 / 40 / / 41 / / 42 / / 43 / / 45 / 43 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 1,151 / 1,105 / 1,074 1,430 / 1,151 / 1,105 1,497 / 1,430 / 1,151 1,568 / 1,395 / 1,183 1,819 / 1,678 / 1,395 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 1,278 / 1,134 / 1,007 1,381 / 1,176 / 1,049 1,490 / 1,381 / 1,176 1,582 / 1,434 / 1,176 1,801 / 1,582 / 1,434 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) 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 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. 12 HIGH STATIC

13 DUCTED HIGH STATIC General Data Table 5: Ducted High Static (B8 Frames) Indoor Unit General Data. Model No. ARNU363B8A4 ARNU423B8A4 ARNU483B8A4 ARNU763B8A4 ARNU963B8A4 Capacity (Btu/h) 36,200 42,000 48,100 76,400 95,900 Power Input 1 (W) Capacity (Btu/h) 40,600 43,800 51,200 86, ,500 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A R410A R410A Refrigerant Control EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 46 / 45 / / 46 / / 46 / / 48 / / 50 / 50 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 1,896 / 1,748 / 1,550 1,963 / 1,786 / 1,589 2,048 / 1,846 / 1,670 2,050 / 1,766 / 1,766 2,684 / 2,260 / 2,260 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 1,730 / 1,317 / 1,066 1,914 / 1,458 / 1,123 2,019 / 1,518 / 1,200 2,260 / 1,766 / 1,766 2,542 / 2,260 / 2,260 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) 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.) 3/4 Brazed 3/4 Brazed 3/4 Brazed 3/4 Brazed 7/8 Brazed 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 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. Ducted High Static HIGH STATIC 13

14 DUCTED HIGH STATIC Electrical Data MULTI V Ducted Indoor Unit Engineering Manual Table 6: Ducted High Static (BH, BG, BR, and B8 Frames) Indoor Unit Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) Power Supply Power Input (W) Hz Volts Phase Cooling Heating ARNU073BHA ARNU093BHA ARNU123BHA ARNU153BHA ARNU183BHA ARNU243BHA ARNU073BGA ARNU093BGA ARNU123BGA ARNU153BGA ARNU183BGA ARNU243BGA ARNU283BGA ARNU363BGA ARNU423BGA ARNU283BRA ARNU363BRA ARNU423BRA ARNU483BRA ARNU543BRA ARNU363B8A ARNU423B8A ARNU483B8A ARNU763B8A ARNU963B8A 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. 14 HIGH STATIC

15 Ducted High Static DUCTED HIGH STATIC Figure 2: ARNU073~243BHA4 Dimensions. HIGH STATIC 15

16 MULTI V Ducted Indoor Unit Engineering Manual DUCTED HIGH STATIC Figure 3: ARNU073~423BGA4 Dimensions. 16 HIGH STATIC

17 Ducted High Static DUCTED HIGH STATIC Figure 4: ARNU283~543BRA4 Dimensions. HIGH STATIC 17

18 MULTI V Ducted Indoor Unit Engineering Manual DUCTED HIGH STATIC Figure 5: ARNU363~963B8A4 Dimensions. 18 HIGH STATIC

19 Ducted High Static DUCTED HIGH STATIC Electrical Wiring Diagram Figure 6: ARNU073~243BHA4 Wiring Diagram. HIGH STATIC 19

20 DUCTED HIGH STATIC Electrical Wiring Diagram MULTI V Ducted Indoor Unit Engineering Manual Table 7: BH Unit Wiring Diagram Legend. Table 8: BH Unit DIP Switch Settings. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-DAMPER N / A N / A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-CC Dry contact Dry Contact connection CN-HUMID N / A N / A CN-LEAK Leak detector Leak detector connection CN-FLOAT Float switch input Float switch sensing CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-WF N / A N / A CN-AIRC N / A N / A CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-ROOM Room sensor Room air thermistor CN-REMO Wired remote controller Wired remote control connection CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit SW4 DRY CONTACT MODE Variable Auto SW5 CONTINUOUS FAN Off On Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off *For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information. 20 HIGH STATIC

21 Ducted High Static DUCTED HIGH STATIC Electrical Wiring Diagram Figure 7: ARNU073~423BGA4 Wiring Diagram. HIGH STATIC 21

22 DUCTED HIGH STATIC Electrical Wiring Diagram MULTI V Ducted Indoor Unit Engineering Manual Table 9: BG Unit Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-VM Sub PCB to Main PCB power supply Power supply connection CN-DAMPER N / A N / A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-CC Dry contact Dry Contact connection CN-HUMID N / A N / A CN-LEAK Leak detector Leak detector connection CN-FLOAT Float switch input Float switch sensing CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-WF N / A N / A CN-AIRC N / A N / A CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-ROOM Room sensor Room air thermistor CN-REMO Wired remote controller Wired remote control connection CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Table 10: BG Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit SW4 DRY CONTACT MODE Variable Auto SW5 CONTINUOUS FAN Off On Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off *For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information. 22 HIGH STATIC

23 Ducted High Static DUCTED HIGH STATIC Electrical Wiring Diagram Figure 8: ARNU283~ARNU543BRA4 Wiring Diagram. HIGH STATIC 23

24 DUCTED HIGH STATIC Electrical Wiring Diagram MULTI V Ducted Indoor Unit Engineering Manual Table 11: BR Unit Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC CN-VM Sub PCB to Main PCB power supply Power supply connection CN-DAMPER N / A N / A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-CC Dry contact Dry Contact connection CN-LEAK Leak detector Leak detector connection CN-FLOAT Float switch input Float switch sensing CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-WF N / A N / A CN-HUMID N / A N / A CN-AIRC N / A N / A CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-ROOM Room sensor Room air thermistor CN-REMO Wired remote controller Wired remote control connection CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Table 12: BR Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit SW4 DRY CONTACT MODE Variable Auto Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when SW5 CONTINUOUS FAN Off On the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off *For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information. 24 HIGH STATIC

25 Ducted High Static DUCTED HIGH STATIC Electrical Wiring Diagram Figure 9: ARNU363~963B8A4 Wiring Diagram. HIGH STATIC 25

26 DUCTED HIGH STATIC Electrical Wiring Diagram MULTI V Ducted Indoor Unit Engineering Manual Table 13: B8 Unit Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC CN-VM Sub PCB to Main PCB power supply Power supply connection CN-DAMPER N / A N / A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-CC Dry contact Dry Contact connection CN-LEAK Leak detector Leak detector connection CN-FLOAT Float switch input Float switch sensing CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-WF N / A N / A CN-HUMID N / A N / A CN-AIRC N / A N / A CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-ROOM Room sensor Room air thermistor CN-REMO Wired remote controller Wired remote control connection CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Table 14: B8 Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit SW4 DRY CONTACT MODE Variable Auto Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when SW5 CONTINUOUS FAN Off On the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off *For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV, Multi V S Engineering Manual for additional information. 26 HIGH STATIC

27 DUCTED HIGH STATIC Refrigerant Flow Diagram Figure 10: BG, BR Unit Refrigerant Flow Diagram. Heat Exchanger EEV Filter Cooling Heating TH3 Sirocco Fan TH2 Filter TH1 lndoor unit Table 15: BG, BR Unit Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Vapor (inch) ARNU073BHA4 ARNU093BHA4 ARNU123BHA4 ARNU153BHA4 ARNU183BHA4 ARNU243BHA4 1/4 Flare 3/8 Flare 1/2 Flare 5/8 Flare ARNU073BGA4 ARNU093BGA4 ARNU123BGA4 ARNU153BGA4 ARNU183BGA4 ARNU243BGA4 ARNU283BGA4 ARNU363BGA4 ARNU423BGA4 3/8 Flare 5/8 Flare ARNU283BRA4 ARNU363BRA4 ARNU423BRA4 ARNU483BRA4 ARNU543BRA4 3/8 Flare 5/8 Flare Ducted High Static Table 16: BH, BG, BR Frame Thermistors. Thermistor Description TH1 Return air thermistor TH2 Pipe in thermistor TH3 Pipe out thermistor HIGH STATIC 27

28 DUCTED HIGH STATIC Refrigerant Flow Diagram Figure 11: B8 Unit Refrigerant Flow Diagram. Heat Exchanger EEV Filter Cooling Heating MULTI V Ducted Indoor Unit Engineering Manual TH3 Sirocco Fan TH1 TH2 lndoor unit Table 17: B8 Unit Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Vapor (inch) ARNU363B8A4 ARNU423B8A4 ARNU483B8A4 ARNU763B8A4 ARNU963B8A4 3/8 Flare Check Valve Solenoid Valve Filter 3/4 Brazed 7/8 Brazed Table 18: B8 Unit Thermistors. Thermistor TH1 TH2 TH3 Description Return air thermistor Pipe in thermistor Pipe out thermistor 28 HIGH STATIC

29 DUCTED HIGH STATIC Table 19: BH Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) Table 20: BG Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) , ,180 1,102 1,059 1, ,317 1,271 1,271 1,133 1,073 1, ,349 1,324 1,324 1,197 1,133 1,084 1, ,448 1,437 1,447 1,432 1,271 1,218 1,133 1, ,497 1,469 1,349 1,274 1,236 1,221 1, Ducted High Static can fail. HIGH STATIC 29

30 DUCTED HIGH STATIC MULTI V Ducted Indoor Unit Engineering Manual Table 21: BR Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) ,642 1,543 1,349 1, ,762 1,628 1,518 1,183 1, ,839 1,772 1,691 1,395 1, ,815 1,808 1,779 1,568 1,522 1,176 1,133 1, ,892 1,896 1,868 1,762 1,705 1,433 1,419 1,158 1, ,967 1,794 1,582 1,504 1,416 1,327 1, ,843 1,794 1,776 1,613 1,575 1,370 1, ,921 1,808 1,779 1,624 1,536 Table 22: B8 Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) , ,861 1, ,249 1, ,511 2,009 1, ,694 2,461 1, ,941 2,775 2,380 1,974 1, ,167 3,076 2,786 2,387 1, ,298 3,227 3,040 2,719 2,345 1,787 1, ,298 3,227 3,118 2,998 2,680 2,454 2,147 1, ,291 3,224 3,118 2,998 2,864 2,733 2,443 2,398 1, can fail. 30 HIGH STATIC

31 DUCTED HIGH STATIC Figure 12: BH Unit External Static Pressure and Air Flow Chart. Figure 13: BG Unit External Static Pressure and Air Flow Chart. External Static Pressure (in-wg) ESP Setting 130 ESP Setting 120 ESP Setting 110 ESP Setting 100 ESP Setting 160 ESP Setting 150 ESP Setting Air Flow (CFM) Ducted High Static HIGH STATIC 31

32 DUCTED HIGH STATIC Figure 14: BR Unit External Static Pressure and Air Flow Chart. P ESP Setting 90 ESP Setting 100 ESP Setting 120 ESP Setting 110 ESP Setting 126 MULTI V Ducted Indoor Unit Engineering Manual Q (CFM) Figure 15: B8 Unit External Static Pressure and Air Flow Chart. P ESP Setting Q (CFM) ESP Setting 105 ESP Setting 95 ESP Setting HIGH STATIC

33 DUCTED HIGH STATIC Table 23: BH Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM Min. ESP (in. wg) Max. ESP (in. wg) Hl High Mid (Factory Set) Low ARNU073BHA4 7.5 Hl Standard Mid Low Hl High Mid (Factory Set) Low ARNU093BHA4 9.6 Hl Standard Mid Low Hl High Mid (Factory Set) Low ARNU123BHA Hl Standard Mid Low Hl High Mid (Factory Set) Low ARNU153BHA Hl Standard Mid Low HI High Mid (Factory Set) Low ARNU183BHA HI Standard Mid Low HI High Mid (Factory Set) Low ARNU243BHA HI Standard Mid Low Ducted High Static HIGH STATIC 33

34 DUCTED HIGH STATIC MULTI V Ducted Indoor Unit Engineering Manual Table 24: BG Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM Min. ESP (in. wg) Max. ESP (in. wg) High High Mid (Factory Set) Low ARNU073BGA4 7.5 High Standard Mid Low High High Mid (Factory Set) Low ARNU093BGA4 9.6 High Standard Mid Low High High Mid (Factory Set) Low ARNU123BGA High Standard Mid Low High High Mid (Factory Set) Low ARNU153BGA High Standard Mid Low High High Mid (Factory Set) Low ARNU183BGA High Standard Mid Low High High Mid (Factory Set) Low ARNU243BGA High Standard Mid Low High High Mid (Factory Set) Low ARNU283BGA High Standard Mid Low High 151 1,141 High Mid , (Factory Set) Low ARNU363BGA High 138 1,003 Standard Mid Low High 157 1,218 High Mid , (Factory Set) Low 151 1,084 ARNU423BGA High 145 1,130 Standard Mid , Low HIGH STATIC

35 DUCTED HIGH STATIC Table 25: BR Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM ARNU283BRA ARNU363BRA ARNU423BRA ARNU483BRA ARNU543BRA High (Factory Set) Standard High (Factory Set) Standard High (Factory Set) Standard High (Factory Set) Standard High (Factory Set) Standard High 108 1,278 Mid ,134 Low 102 1,007 High 94 1,151 Mid ,105 Low 89 1,074 High 110 1,381 Mid ,176 Low 103 1,049 High 102 1,430 Mid ,151 Low 91 1,105 High 113 1,490 Mid ,381 Low 106 1,176 High 104 1,497 Mid ,430 Low 94 1,151 High 116 1,582 Mid ,434 Low 106 1,176 High 106 1,568 Mid ,395 Low 95 1,183 High 121 1,801 Mid ,582 Low 111 1,434 High 112 1,819 Mid ,678 Low 102 1,395 Min. ESP (in. wg) Max. ESP (in. wg) Ducted High Static HIGH STATIC 35

36 DUCTED HIGH STATIC MULTI V Ducted Indoor Unit Engineering Manual Table 26: B8 Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM ARNU363B8A ARNU423B8A ARNU483B8A ARNU763B8A ARNU963B8A High (Factory Set) Standard High (Factory Set) Standard High (Factory Set) Standard High (Factory Set) Standard High (Factory Set) Standard High 92 1,730 Mid ,317 Low High 74 1,896 Mid ,748 Low 66 1,550 High 93 1,914 Mid ,459 Low 85 1,123 High 75 1,964 Mid ,787 Low 66 1,589 High 94 2,020 Mid ,519 Low 86 1,201 High 76 2,048 Mid ,847 Low 67 1,670 High 102 2,119 Mid ,766 Low 98 1,766 High 86 2,260 Mid ,766 Low 83 1,766 High 105 2,542 Mid ,260 Low 102 2,260 High 94 2,684 Mid ,260 Low 89 2,260 Min. ESP (in. wg) Max. ESP (in. wg) HIGH STATIC

37 DUCTED HIGH STATIC Figure 16: Sound Pressure Measurement Location. DISCHARGE SUCTION DUCT DUCT 6.6 ft. 3.3 ft. 4.9 ft. Measurements are taken 4.9 ft away from the front of the unit. Sound pressure levels are measured in db(a) with a tolerance of ±3. Sound pressure levels are tested in an anechoic chamber under ISO Standard Operating Conditions: Power source: 220V/60 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. Table 27: Ducted High Static Indoor Unit Sound Pressure Levels. Model Sound Pressure Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed ARNU073BHA ARNU093BHA ARNU123BHA ARNU153BHA ARNU183BHA ARNU243BHA ARNU073BGA ARNU093BGA ARNU123BGA ARNU153BGA ARNU183BGA ARNU243BGA ARNU283BGA ARNU363BGA ARNU423BGA ARNU283BRA ARNU363BRA ARNU423BRA ARNU483BRA ARNU543BRA ARNU363B8A ARNU423B8A ARNU483B8A ARNU763B8A ARNU963B8A Ducted High Static HIGH STATIC 37

38 DUCTED HIGH STATIC Figure 17: ARNU073BHA4, ARNU093BHA4, and ARNU123BHA4 Sound Pressure Level Diagrams. ARNU073BHA4 ARNU093BHA4 ARNU123BHA4 MULTI V Ducted Indoor Unit Engineering Manual Figure 18: ARNU153BHA4, ARNU183BHA4, and ARNU243BHA4 Sound Pressure Level Diagrams. ARNU153BHA4 ARNU183BHA4 ARNU243BHA4 38 HIGH STATIC

39 DUCTED HIGH STATIC Figure 19: ARNU073BGA4, ARNU093BGA4, and ARNU123BGA4 Sound Pressure Level Diagrams. ARNU073BGA4 ARNU093BGA4 ARNU123BGA4 Figure 20: ARNU153BGA4, ARNU183BGA4, and ARNU243BGA4 Sound Pressure Level Diagrams. ARNU153BGA4 ARNU183BGA4 ARNU243BGA4 Ducted High Static HIGH STATIC 39

40 DUCTED HIGH STATIC Figure 21: ARNU283BGA4, ARNU363BGA4, and ARNU423BGA4 Sound Pressure Level Diagrams. ARNU283BGA4 ARNU363BGA4 ARNU423BGA4 MULTI V Ducted Indoor Unit Engineering Manual Figure 22: ARNU283BRA4, ARNU363BRA4, and ARNU423BRA4 Sound Pressure Level Diagrams. ARNU283BRA4 ARNU363BRA4 ARNU423BRA4 40 HIGH STATIC

41 DUCTED HIGH STATIC Figure 23: ARNU483BRA4, ARNU543BRA4 Sound Pressure Level Diagrams. ARNU483BRA4 ARNU543BRA4 Figure 24: ARNU363B8A4, ARNU423B8A4, and ARNU483B8A4 Sound Pressure Level Diagrams. ARNU363B8A4 ARNU423B8A4 ARNU483B8A4 Ducted High Static HIGH STATIC 41

42 MULTI V Ducted Indoor Unit Engineering Manual DUCTED HIGH STATIC Figure 25: ARNU763B8A4, ARNU963B8A4 Sound Pressure Level Diagrams. ARNU763B8A4 ARNU963B8A4 42 HIGH STATIC

43 DUCTED HIGH STATIC Table 28: Ducted High Static Indoor Unit Sound Power Levels. Model Sound Power Levels db(a) High Fan Speed ARNU073BHA4 53 ARNU093BHA4 54 ARNU123BHA4 56 ARNU153BHA4 58 ARNU183BHA4 60 ARNU243BHA4 61 ARNU073BGA4 53 ARNU093BGA4 54 ARNU123BGA4 55 ARNU153BGA4 56 ARNU183BGA4 58 ARNU243BGA4 60 ARNU283BGA4 61 ARNU363BGA4 62 ARNU423BGA4 64 ARNU283BRA4 62 ARNU363BRA4 62 ARNU423BRA4 62 ARNU483BRA4 62 ARNU543BRA4 65 ARNU363B8A4 70 ARNU423B8A4 70 ARNU483B8A4 70 ARNU763B8A4 70 ARNU963B8A4 72 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. 2 Ducted High Static Figure 26: ARNU073BHA4, ARNU093BHA4, and ARNU123BHA4 Sound Power Level Diagrams. ARNU073BHA4 ARNU093BHA4 ARNU123BHA4 HIGH STATIC 43

44 DUCTED HIGH STATIC Figure 27: ARNU153BHA4, ARNU183BHA4, and ARNU243BHA4 Sound Power Level Diagrams. ARNU153BHA4 ARNU183BHA4 ARNU243BHA4 MULTI V Ducted Indoor Unit Engineering Manual Figure 28: ARNU073BGA4, ARNU093BGA4, and ARNU123BGA4 Sound Power Level Diagrams. ARNU073BGA4 ARNU093BGA4 ARNU123BGA4 44 HIGH STATIC

45 DUCTED HIGH STATIC Figure 29: ARNU153BGA4, ARNU183BGA4, and ARNU243BGA4 Sound Power Level Diagrams. ARNU153BGA4 ARNU183BGA4 ARNU243BGA4 Figure 30: ARNU283BGA4, ARNU363BGA4, and ARNU423BGA4 Sound Power Level Diagrams. ARNU283BGA4 ARNU363BGA4 ARNU423BGA4 Ducted High Static HIGH STATIC 45

46 DUCTED HIGH STATIC Figure 31: ARNU283~483BRA4 and ARNU543BRA4 Sound Power Level Diagrams. ARNU283BRA4, ARNU363BRA4, ARNU543BRA4 ARNU423BRA4, ARNU483BRA4 MULTI V Ducted Indoor Unit Engineering Manual Figure 32: ARNU363~763B8A4 and ARNU963B8A4 Sound Power Level Diagrams. ARNU363B8A4, ARNU423B8A4, ARNU963B8A4 ARNU483B8A4, ARNU763B8A4 46 HIGH STATIC

47 DUCTED HIGH STATIC ARNU073BHA4, ARNU093BHA4, ARNU123BHA4 Table 29: ARNU073BHA4, ARNU093BHA4, ARNU123BHA4 Cooling Capacity Table. Model No. / Capacity Index ARNU073BHA4 / 7.5 ARNU093BHA4 / 9.6 ARNU123BHA4 / 12.3 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Ducted High Static HIGH STATIC 47

48 DUCTED HIGH STATIC ARNU153BHA4, ARNU183BHA4, ARNU243BHA4 MULTI V Ducted Indoor Unit Engineering Manual Table 30: ARNU153HA4, ARNU183BHA4, ARNU243BHA4 Cooling Capacity Table. Model No. / Capacity Index ARNU153BHA4 / 15.4 ARNU183BHA4 / 19.1 ARNU243BHA4 / 24.3 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). 48 HIGH STATIC

49 DUCTED HIGH STATIC ARNU073BGA4, ARNU093BGA4, ARNU123BGA4 Table 31: ARNU073BGA4, ARNU093BGA4, ARNU123BGA4 Cooling Capacity Table. Model No. / Capacity Index ARNU073BGA4 / 7.5 ARNU093BGA4 / 9.6 ARNU123BGA4 / 12.3 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Ducted High Static HIGH STATIC 49

50 DUCTED HIGH STATIC ARNU153BGA4, ARNU183BGA4, ARNU243BGA4 MULTI V Ducted Indoor Unit Engineering Manual Table 32: ARNU153BGA4, ARNU183BGA4, ARNU243BGA4 Cooling Capacity Table. Model No. / Capacity Index ARNU153BGA4 / 15.4 ARNU183BGA4 / 19.1 ARNU243BGA4 / 24.2 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). 50 HIGH STATIC

51 DUCTED HIGH STATIC ARNU283BGA4, ARNU363BGA4, ARNU423BGA4 Table 33: ARNU283BGA4, ARNU363BGA4, ARNU423BGA4 Cooling Capacity Table. Model No. / Capacity Index ARNU283BGA4 / 28.0 ARNU363BGA4 / 36.2 ARNU423BGA4 / 42.0 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Ducted High Static HIGH STATIC 51

52 DUCTED HIGH STATIC ARNU283BGA4, ARNU363BGA4, ARNU423BGA4 MULTI V Ducted Indoor Unit Engineering Manual Table 34: ARNU283BRA4, ARNU363BRA4, ARNU423BRA4 Cooling Capacity Table. Model No. / Capacity Index ARNU283BRA4 / 28.0 ARNU363BRA4 / 36.2 ARNU423BRA4 / 42.0 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). 52 HIGH STATIC

53 DUCTED HIGH STATIC ARNU483BRA4, ARNU543BRA4, ARNU363B8A4 Table 35: ARNU483BRA4, ARNU543BRA4, ARNU363B8A4 Cooling Capacity Table. Model No. / Capacity Index ARNU483BRA4 / 48.1 ARNU543BRA4 / 54.0 ARNU363B8A4 / 36.2 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Ducted High Static HIGH STATIC 53

54 DUCTED HIGH STATIC ARNU423B8A4, ARNU483B8A4, ARNU763B8A4 MULTI V Ducted Indoor Unit Engineering Manual Table 36: ARNU423B8A4, ARNU483B8A4, ARNU763B8A4 Cooling Capacity Table. Model No. / Capacity Index ARNU423B8A4 / 42.0 ARNU483BRA4 / 48.1 ARNU763B8A4 / 76.4 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). 54 HIGH STATIC

55 DUCTED HIGH STATIC ARNU963B8A4 Table 37: ARNU963B8A4 Cooling Capacity Table. Model No. / Capacity Index ARNU963B8A4 / 95.9 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Ducted High Static HIGH STATIC 55

56 DUCTED HIGH STATIC ARNU073BHA4, ARNU093BHA4, ARNU123BHA4, ARNU153BHA4 MULTI V Ducted Indoor Unit Engineering Manual Table 38: ARNU073BHA4, ARNU093BHA4, ARNU123BHA4, ARNU153BHA4 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 ARNU073BHA4 / 7.5 ARNU093BHA4 / 9.6 ARNU123BHA4 / 12.3 ARNU153BHA4 / 15.4 TC: Total Capacity (MBh) HIGH STATIC

57 DUCTED HIGH STATIC ARNU183BHA4, ARNU243BHA4 Table 39: ARNU183BHA4, ARNU243BHA4 Heating Capacity Table. Model No. / Outdoor Air Temp Indoor Air Temperature ( F DB) Capacity Index F DB F WB TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh ARNU183BHA4 / ARNU243BHA4 / 24.2 TC: Total Capacity (MBh) Ducted High Static HIGH STATIC 57

58 DUCTED HIGH STATIC ARNU073BGA4, ARNU093BGA4, ARNU123BGA4, ARNU153BGA4 MULTI V Ducted Indoor Unit Engineering Manual Table 40: ARNU073BGA4, ARNU093BGA4, ARNU123BGA4, ARNU153BGA4 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 ARNU073BGA4 / 7.5 ARNU093BGA4 / 9.6 ARNU123BGA4 / 12.3 ARNU153BGA4 / 15.4 TC: Total Capacity (MBh) HIGH STATIC

59 DUCTED HIGH STATIC ARNU183BGA4, ARNU243BGA4, ARNU283BGA4, ARNU363BGA4 Table 41: ARNU183BGA4, ARNU243BGA4, ARNU283BGA4, ARNU363BGA4 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 ARNU183BGA4 / 19.1 ARNU243BGA4 / 24.2 ARNU283BGA4 / 28.0 ARNU363BGA4 / 36.2 TC: Total Capacity (MBh) Ducted High Static HIGH STATIC 59

60 DUCTED HIGH STATIC ARNU423BGA4, ARNU283BRA4, ARNU363BRA4, ARNU423BRA4 MULTI V Ducted Indoor Unit Engineering Manual Table 42: ARNU423BGA4, ARNU283BRA4, ARNU363BRA4, ARNU423BRA4 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 ARNU423BGA4 / 42.0 ARNU283BRA4 / 28.0 ARNU363BRA4 / 36.2 ARNU423BRA4 / 42.0 TC: Total Capacity (MBh) HIGH STATIC

61 DUCTED HIGH STATIC ARNU483BRA4, ARNU543BRA4, ARNU363B8A4, ARNU423B8A4 Table 43: ARNU483BRA4, ARNU543BRA4, ARNU363B8A4, ARNU423B8A4 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 ARNU483BRA4 / 48.1 ARNU543BRA4 / 54.0 ARNU363B8A4 / 36.2 ARNU423B8A4 / 42.0 TC: Total Capacity (MBh) Ducted High Static HIGH STATIC 61

62 DUCTED HIGH STATIC ARNU763B8A4, ARNU963B8A4 MULTI V Ducted Indoor Unit Engineering Manual Table 44: ARNU763B8A4, ARNU963B8A4 Heating Capacity Table. Model No. / Outdoor Air Temp Indoor Air Temperature ( F DB) Capacity Index F DB F WB TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh ARNU763B8A4 / ARNU963B8A4 / 95.9 TC: Total Capacity (MBh) HIGH STATIC

63 DUCTED HIGH STATIC Table 45: Optional Accessories for Ducted High Static Indoor Units. Accessory High Efficiency Filter Box Dynamic V8 Low Profile Air Cleaner Dynamic V8 VL Replacement Filter Pads Model Number ZFBXBH01A (For 7~24MBh Ducted High Static Indoor Units) ZFBXBG01A (For 7~42MBh Ducted High Static Indoor Units) ZFBXBR01A (For 28-54MBh Ducted High Static Indoor Units) ZFBXB801A (For 36-96MBh Ducted High Static Indoor Units) ZPLMV201A (2VL) ZPLMV402A (4VL) ZFLT1301A (4-Pack) ZFLT1302A (24-Pack) Return Air Grille ZGRLRA01A (Louvered) ZGRLRA02A (Egg Crate) Return Air Plenum All accessories are sold separately. ZPLMV201A (2VL) ZPLMV402A (4VL) Ducted High Static HIGH STATIC 63

64 MULTI V Ducted Indoor Unit Engineering Manual 64 HIGH STATIC

65 CEILING-CONCEALED DUCTED LOW STATIC Mechanical Specifications on page 66 General Data on page 67 Electrical Data on page 68 External Dimensions on page 69 Electrical Wiring Diagrams on page 70 Refrigerant Flow Diagrams on page 74 External Static Pressure and Air Flow on page 75 External Static Pressure Ranges on page 77 Acoustic Data on page 78 Capacity Tables on page 81

66 DUCTED LOW STATIC MULTI V Ducted Indoor Unit Engineering Manual Casing The case is a low profile design with a maximum height of eight inches designed to mount concealed above the finished ceiling. Fan supply air is front horizontal with a rear horizontal field convertible to a bottom return. The unit is manufactured with coated metal. Cold surfaces are covered with a polystyrene insulating material. The case is provided with hanger brackets designed to support the unit weight on four corners. Hanger brackets have pre-punched holes designed to accept field supplied all-thread rod hangers. Fan Assembly and Control The unit has Sirocco fans made of high strength ABS HT-700 polymeric resin. Fans are directly driven and mounted on a common shaft. 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 switch settings will allow the fan to run constantly during defrost or Air Filter Return air is filtered with a removable, washable filter with anti-fungal treatment. Microprocessor Controls The unit is provided with an integrated microprocessor-based controller. The controller is capable of performing functions necessary to operate the system without the use of a wall-mounted controller. A temperature thermistor is factory-mounted in the return air stream. All unit operation parameters, excluding the 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, 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. 66 LOW STATIC In Heating mode, the microprocessor control will activate the indoor unit when indoor room temperature falls below setpoint temperature and signals the outdoor unit to begin heating cycle. The indoor unit fan operation is delayed until coil pipe temperature reaches 76ºF. Significant airflow is generated when pipe temperature reaches 80 F. In lieu of 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 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 is provided with a factory installed and wired condensate lift/pump capable of providing a minimum 27.5 inch lift from the bottom exterior surface of the unit casing. The lift pump comes with a safety switch that will shut off indoor unit if condensate rises too high in the drain pan. Condensate Drain Pan The condensate drain pan is constructed of high impact polystyrene resin (HIPS). Coil The indoor unit coil is constructed with grooved design copper tubes with slit coil fins, two (2) to three (3) rows, eighteen (18) to twenty-one (21) fins per inch. Controls Features Auto changeover (Heat Recovery only) Auto operation Auto restart External on / off control Dual thermistor control Dual set-point control* Filter life and power consumption display* Multiple auxiliary heater applications* Group control External static pressure control Hot start Self diagnostics Timer (on / off) Weekly schedule Fan speed control Ventilation (outside air) -

67 DUCTED LOW STATIC General Data Table 37: Ducted Low Static (L1, L2, L3 Frames) Indoor Unit General Data. Model No. ARNU073L1G4 ARNU093L1G4 ARNU123L2G4 ARNU153L2G4 ARNU183L2G4 ARNU243L3G4 Capacity (Btu/h) 7,500 9,600 12,300 15,400 19,100 24,000 Power Input 1 (W) Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 27,300 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A R410A R410A R410A Refrigerant Control EEV EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 27 / 26 / / 26 / / 29 / / 31 / / 34 / / 35 / 32 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 270 / 230 / / 250 / / 310 / / 360 / / 450 / / 570 / 430 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 270 / 230 / / 250 / / 310 / / 360 / / 450 / / 570 / 430 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare Condensate Line (in., I.D.) EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national codes. This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. Ducted Low Static LOW STATIC 67

68 DUCTED LOW STATIC Electrical Data MULTI V Ducted Indoor Unit Engineering Manual Table 38: Ducted Low Static (L1, L2, L3 Frames) Indoor Unit Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) Power Supply Power Input (W) Hz Volts Phase Cooling Heating ARNU073L1G ARNU093L1G ARNU123L2G ARNU153L2G ARNU183L2G ARNU243L3G 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. 68 LOW STATIC

69 DUCTED LOW STATIC Figure 26: ARNU L1G4, ARNU123~183L2G4, ARNU243L3G4 Dimensions. 11-1/2 2-5/8 4-1/16 7-1/2 3-15/16 3-1/16 Vapor Pipe Connection Liquid Pipe Connection Drain Pipe Connection Power Supply Connection 27-9/16 7-1/2 6-1/16 13/ /4 8-11/16 5-5/16 1-3/8 13/16 D L1 : 14-7/16 L2 : 22-1/16 L3 : 29-3/4 Top Top Top C Air Inlet Air Outlet L1 : 2-15/16 L2 : 3-1/16 L3 : 3-3/16 Ducted Low Static B A Center of Gravity Unit: inches Note: All measurements have a tolerance of ±1/4 in. ARNU073L1G4 ARNU093L1G4 ARNU123L2G4 ARNU153L2G4 ARNU183L2G4 ARNU243L3G4 A B C D 30-1/2 27-9/ / /8 35-7/ /4 33-7/8 46-1/4 43-5/ /8 41-3/4 LOW STATIC 69

70 MULTI V Ducted Indoor Unit Engineering Manual DUCTED LOW STATIC Electrical Wiring Diagram Figure 27: ARNU073L1G4, ARNU093L1G4 Wiring Diagram. 70 LOW STATIC

71 DUCTED LOW STATIC Electrical Wiring Diagram Table 39: L1 Unit Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-DAMPER N / A N / A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-CC Dry contact Dry Contact connection CN-AIRC N / A N / A CN-LEAK Leak detector Leak detector connection CN-WF N / A N / A CN-HUMID N / A N / A CN-FLOAT Float switch input Float switch sensing CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-ROOM Room sensor Room air thermistor CN-REMO Wired remote controller Wired remote control connection CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Ducted Low Static Table 40: L1 Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave SW4 DRY CONTACT MODE Variable Auto Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when SW5 CONTINUOUS FAN Off On the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off *For Gen 4 Multi V ducted indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV Engineering Manual for additional information. LOW STATIC 71

72 MULTI V Ducted Indoor Unit Engineering Manual DUCTED LOW STATIC Electrical Wiring Diagram Figure 28: ARNU123L2G4, ARNU153L2G4, ARNU183L2G4, ARNU243L3G4 Wiring Diagram. 72 LOW STATIC

73 DUCTED LOW STATIC Electrical Wiring Diagram Table 41: L2, L3 Unit Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC CN-DAMPER N / A N / A CN-ZONE Zone controller Zone controller connection CN-EXT External on / off controller External on / off Controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-DISPLAY Display Display of indoor status CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-CC Dry contact Dry Contact connection CN-AIRC N / A N / A CN-LEAK Leak detector Leak detector connection CN-WF N / A N / A CN-HUMID N / A N / A CN-FLOAT Float switch input Float switch sensing CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-ROOM Room sensor Room air thermistor CN-REMO Wired remote controller Wired remote control connection CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Ducted Low Static Table 42: L2, L3 Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave SW4 DRY CONTACT MODE Variable Auto Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode SW5 CONTINUOUS FAN Off On Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off *For Gen 4 Multi V ducted indoor units, DIP switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV Engineering Manual for additional information. LOW STATIC 73

74 DUCTED LOW STATIC Refrigerant Flow Diagram Figure 29: L1, L2, L3 Unit Refrigerant Flow Diagram. Heat Exchanger EEV Filter Cooling Heating TH3 TH2 Sirocco Fan Filter MULTI V Ducted Indoor Unit Engineering Manual TH1 lndoor unit Table 43: L1, L2, L3 Unit Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Vapor (inch) ARNU073L1G4 ARNU093L1G4 1/4 Flare 1/2 Flare ARNU123L2G4 ARNU153L2G4 ARNU183L2G4 1/4 Flare 1/2 Flare ARNU243L3G4 3/8 Flare 5/8 Flare Table 44: L1, L2, L3 Unit Thermistors. Thermistor TH1 TH2 TH3 Description Return air thermistor Pipe in thermistor Pipe out thermistor 74 LOW STATIC

75 DUCTED LOW STATIC Table 45: L1 Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) Table 46: L2 Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) Table 47: L3 Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) Ducted Low Static can fail. LOW STATIC 75

76 DUCTED LOW STATIC Figure 30: L1 Unit External Static Pressure and Air Flow Chart. MULTI V Ducted Indoor Unit Engineering Manual External Sta c Pressure(in-wg) ESP Setting 90 ESP Setting 100 ESP Setting 110 Air Flow(cfm) ESP Setting 120 ESP Setting Figure 31: L2 Unit External Static Pressure and Air Flow Chart. External Sta c Pressure(in-wg) ESP 0.12 Setting ESP Setting 0.08 ESP Setting ESP ESP Setting Setting Air Flow(cfm) Figure 32: L3 Unit External Static Pressure and Air Flow Chart. External Sta c Pressure(in-wg) ESP Setting ESP Setting ESP ESP ESP ESP Setting Setting Setting Setting Air Flow(cfm)) 76 LOW STATIC

77 DUCTED LOW STATIC Table 48: L1 Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM Min. ESP (in. wg) Max. ESP (in. wg) High High Mid (Factory Set) Low ARNU073L1G4 7.5 High Standard Mid Low High High Mid (Factory Set) Low ARNU093L1G4 9.6 High Standard Mid Low Table 50: L2 Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM Min. ESP (in. wg) Max. ESP (in. wg) High High Mid (Factory Set) Low ARNU123L2G High Standard Mid Low High High Mid (Factory Set) Low ARNU153L2G High Standard Mid Low High High Mid (Factory Set) Low ARNU183L2G High Standard Mid Low Ducted Low Static Table 49: L3 Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM Min. ESP (in. wg) Max. ESP (in. wg) High High Mid (Factory Set) Low ARNU243L3G High Standard Mid Low LOW STATIC 77

78 DUCTED LOW STATIC Figure 33: Sound Pressure Measurement Location. DISCHARGE SUCTION DUCT DUCT 6.6 ft. 3.3 ft. 4.9 ft. Measurements are taken 4.9 ft away from the front of the unit. Sound pressure levels are measured in db(a) with a tolerance of ±3. Sound pressure levels are tested in an anechoic chamber under ISO Standard Operating Conditions: Power source: 220V/60 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. MULTI V Ducted Indoor Unit Engineering Manual Table 51: Ducted Low Static Sound Pressure Levels. Model Sound Pressure Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed ARNU073L1G ARNU093L1G ARNU123L2G ARNU153L2G ARNU183L2G ARNU243L3G Figure 34: ARNU073L1G4, ARNU093L1G4, and ARNU123L2G4 Sound Pressure Level Diagrams. ARNU073L1G4 ARNU093L1G4 ARNU123L2G4 78 LOW STATIC

79 DUCTED LOW STATIC Figure 35: ARNU153L2G4, ARNU183L2G4, and ARNU243L3G4 Sound Pressure Level Diagrams. ARNU153L2G4 ARNU183L2G4 ARNU243L3G4 Sound Power Levels Table 52: Ducted Low Static Sound Power Levels. Model Sound Power Levels db(a) ARNU073L1G4 48 ARNU093L1G4 49 ARNU123L2G4 52 ARNU153L2G4 53 ARNU183L2G4 54 ARNU243L3G4 58 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. 2 Ducted Low Static LOW STATIC 79

80 DUCTED LOW STATIC Figure 36: ARNU073L1G4, ARNU093L1G4, and ARNU123L2G4 Sound Power Level Diagrams. ARNU073L1G4 ARNU093L1G4 ARNU123L2G4 MULTI V Ducted Indoor Unit Engineering Manual Figure 37: ARNU153L2G4, ARNU183L2G4, and ARNU243L3G4 Sound Power Level Diagrams. ARNU153L2G4 ARNU183L2G4 ARNU243L3G4 80 LOW STATIC

81 DUCTED LOW STATIC ARNU073L1G4, ARNU093L1G4, ARNU123L2G4 Table 53: ARNU073L1G4, ARNU093L1G4, ARNU123L2G4 Cooling Capacity Table. Model No. / Capacity Index ARNU073L1G4 / 7.5 ARNU093L1G4 / 9.6 ARNU123L2G4 / 12.3 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Ducted Low Static LOW STATIC 81

82 DUCTED LOW STATIC ARNU153L2G4, ARNU183L2G4, ARNU243L3G4 MULTI V Ducted Indoor Unit Engineering Manual Table 54: ARNU153L2G4, ARNU183L2G4, ARNU243L3G4 Cooling Capacity Table. Model No. / Capacity Index ARNU153L2G4 / 15.4 ARNU183L2G4 / 19.1 ARNU243L3G4 / 24.2 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). 82 LOW STATIC

83 DUCTED LOW STATIC ARNU073L1G4, ARNU093L1G4, ARNU123L2G4, ARNU153L2G4 Table 55: ARNU073L1G4, ARNU093L1G4, ARNU123L2G4, ARNU153L2G4 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 ARNU073L1G4 / 7.5 ARNU093L1G4 / 9.6 ARNU123L2G4 / 12.3 ARNU153L2G4 / 15.4 TC: Total Capacity (MBh) Ducted Low Static LOW STATIC 83

84 DUCTED LOW STATIC ARNU183L2G4, ARNU243L3G4 MULTI V Ducted Indoor Unit Engineering Manual Table 56: ARNU183L2G4, ARNU243L3G4 Heating Capacity Table. Model No. / Outdoor Air Temp Indoor Air Temperature ( F DB) Capacity Index F DB F WB TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh ARNU183L2G4 / ARNU243L3G4 / 24.2 TC: Total Capacity (MBh) LOW STATIC

85 CEILING-CONCEALED DUCTED BUILT IN Mechanical Specifications on page 86 General Data on page 87 Electrical Data on page 88 External Dimensions on page 89 Electrical Wiring Diagram on page 90 Refrigerant Flow Diagrams on page 92 External Static Pressure and Air Flow on page 93 External Static Pressure Ranges on page 95 Acoustic Data on page 96 Capacity Tables on page 99 Optional Accessories on page 103

86 DUCTED BUILT IN MULTI V Ducted Indoor Unit Engineering Manual Casing The case is designed to mount concealed above a finished ceiling. Supply air is front horizontal with a dedicated bottom vertical return. The unit is manufactured with coated metal. Cold surfaces are covered with a coated polystyrene insulating material. The case is provided with hanger brackets designed to support the unit weight on four corners. Hanger brackets have pre-punched holes designed to accept field-supplied all-thread rod hangers. Fan Assembly and Control The unit has Sirocco fans made of high strength ABS HR-2407 polymeric resin. Fans are directly driven and mounted on a common shaft. 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 and DIP switch settings will allow the fan to run constantly during defrost or oil return modes. Each setting can be field adjusted from the factory setting (RPM / ESP) to compensate for a limited amount of additional resistance to airflow caused by field connected ductwork or other airflow restricting devices. Ceiling Grille/Duct Kit An optional flush-mounted ceiling return air grille and accordion-style canvas duct kit provides a short-ducted return air solution. Air Filter Return air is filtered with a removable, washable filter with anti-fungal treatment. Microprocessor Controls The unit is provided with an integrated microprocessor-based controller. The controller is capable of performing functions necessary to operate the system without the use of a wall-mounted controller. A temperature thermistor is factory-mounted in the return air stream. All unit operation parameters, excluding the unit operating schedule, are stored in non-volatile memory resident on the unit microprocessor. Operating schedules are stored in select models of the optional, nication 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, 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. 86 BUILT IN In Heating mode, the microprocessor control will activate the indoor unit when indoor room temperature falls below set-point temperature and signals the outdoor unit to begin the heating cycle. The indoor unit fan operation is delayed until coil pipe temperature reaches 76ºF. Significant airflow is generated when pipe temperature reaches 80 F. In lieu of 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 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 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 is provided with a factory installed and wired condensate/lift pump capable of providing a minimum 27.5 inch lift from the bottom exterior surface of the unit casing. The lift pump comes with a safety switch that will shut off indoor unit if condensate rises too high in the drain pan. Condensate Drain Pan The condensate drain pan is constructed of high impact polystyrene resin (HIPS). Coil The indoor unit coil is constructed with grooved design copper tubes with slit coil fins, two (2) to three (3) rows, eighteen (18) to twenty-one (21) fins per inch. Controls Features Auto changeover (Heat Recovery only) Auto operation Auto restart External on / off control Dual thermistor control Dual set-point control* Filter life and power consumption display* Multiple auxiliary heater applications* Group control External static pressure control Hot start Self diagnostics Timer (on / off) Weekly schedule Fan speed control Ventilation (outside air) -

87 DUCTED BUILT IN General Data Table 57: Ducted Built In (B3, B4 Frames) Indoor Unit General Data. Model No. ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4 ARNU183B4G4 ARNU243B4G4 Capacity (Btu/h) 7,500 9,600 12,300 15,400 19,100 24,200 Power Input 1 (W) Capacity (Btu/h) 8,500 10,900 13,600 17,100 21,500 27,300 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A R410A R410A R410A Refrigerant Control EEV EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 33 / 32 / / 33 / / 34 / / 40 / / 40 / / 43 / 37 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 283 / 229 / / 247 / / 283 / / 353 / / 424 / / 530 / 353 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 283 / 229 / / 247 / / 283 / / 353 / / 424 / / 530 / 353 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) Liquid Line (in., O.D.) 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 1/4 Flare 3/8 Flare Vapor Line (in., O.D.) 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 1/2 Flare 5/8 Flare Condensate Line (in., I.D.) EEV: Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national codes. This unit comes with a dry nitrogen charge. This data is rated 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. Ducted Built In BUILT IN 87

88 DUCTED BUILT IN Electrical Data MULTI V Ducted Indoor Unit Engineering Manual Table 58: Ducted Built In (B3, B4 Frames) Indoor Unit Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) Power Supply Power Input (W) Hz Volts Phase Cooling Heating ARNU073B3G ARNU093B3G ARNU123B3G ARNU153B3G ARNU183B4G ARNU243B4G 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. 88 BUILT IN

89 DUCTED BUILT IN Figure 38: ARNU073~153B3G4, ARNU B4G4 Dimensions. With Suction Grill With Suction Grill With Suction Grill & Suction Canvas & Suction Canvas 2-1/2 7-1/2 2-3/8 Return Air 22-5/8 15-1/8 24-5/ /4 10-7/8 8-1/2 1 Drain Liquid Vapor B2 Supply Air A2 A3 C2 B3 C3 9-13/16 7-7/ /16 (Max) 7-1/2 A1 With Suction Grill With Suction Grill & Suction Canvas With Suction Grill Model ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4 ARNU183B4G4 ARNU243B4G4 A1 32-5/8 43-5/16 Power Connection Unit: inches Note: All measurements have a tolerance of ±1/4 in. Ducted Built In Accessory A2 B2 C2 Accessory A3 B3 C3 PBSGB / /8 2-3/16 PBSC / /16 1-9/16 to 9-13/16 PBSGB / /8 2-3/16 PBSC / /16 1-9/16 to 9-13/16 BUILT IN 89

90 MULTI V Ducted Indoor Unit Engineering Manual DUCTED BUILT IN Electrical Wiring Diagram Figure 39: ARNU073~153B3G4, ARNU B4G4 Wiring Diagram. 90 BUILT IN

91 DUCTED BUILT IN Electrical Wiring Diagram Table 59: B3, B4 Unit Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC CN-MOTOR2 Fan motor output Motor output of BLDC CN-VM Sub PC power supply Power supply connection CN-FLOAT Float switch input Float switch sensing CN-ZONE Zone controller Zone controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-EXT External ON / OFF controller External ON / OFF controller connection CN-DISPLAY Display Display of indoor status CN-CC Dry contact Dry Contact connection CN-PTC Auxiliary heater Connection for Auxiliary Heater CN-PIPE/OUT Discharge pipe sensor Pipe out thermistor CN-LEAK Refrigerant leak detector Refrigerant leak detector connection CN-PIPE/IN Suction pipe sensor Pipe in thermistor CN-REMO Wired remote controller Wired remote control connection CN-ROOM Room sensor Room air thermistor CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Ducted Built In Table 60: B3, B4 Unit DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave SW4 DRY CONTACT MODE Variable Auto Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode SW5 CONTINUOUS FAN Off On Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off *For Gen 4 Multi V ducted indoor units, DIP Switches 1, 2, 6 through 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV Engineering Manual for additional information. BUILT IN 91

92 DUCTED BUILT IN Refrigerant Flow Diagram Figure 40: B3, B4 Unit Refrigerant Flow Diagram. Heat Exchanger EEV Filter Cooling Heating MULTI V Ducted Indoor Unit Engineering Manual TH3 TH2 Sirocco Fan TH1 lndoor unit Table 61: B3, B4 Unit Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Vapor (inch) ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 ARNU153B3G4 1/4 Flare 1/2 Flare ARNU183B4G4 1/4 Flare 1/2 Flare ARNU243B4G4 3/8 Flare 5/8 Flare Filter Table 62: B3, B4 Unit Thermistors. Thermistor TH1 TH2 TH3 Description Return air thermistor Pipe in thermistor Pipe out thermistor 92 BUILT IN

93 DUCTED BUILT IN Table 63: B3 Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) Table 64: B4 Unit External Static Pressure and Air Flow Table. Set Value Static Pressure (in. wg) Ducted Built In can fail. BUILT IN 93

94 DUCTED BUILT IN Figure 41: B3 Unit External Static Pressure and Air Flow Chart MULTI V Ducted Indoor Unit Engineering Manual External Sta c Pressure(in-wg) ESP Setting 90 ESP Setting 100 Air Flow(cfm) ESP Setting ESP Setting ESP 0.04 Setting ESP Setting Figure 42: B4 Unit External Static Pressure and Air Flow Chart. External Sta c Pressure(in-wg) ESP ESP 0.06 ESP Setting Setting ESP Setting ESP Setting 110 Setting Air Flow(cfm) 94 BUILT IN

95 DUCTED BUILT IN Table 65: B3 Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM Min. ESP (in. wg) Max. ESP (in. wg) High High Mid (Factory Set) Low ARNU073B3G4 7.5 High Standard Mid Low High High Mid (Factory Set) Low ARNU093B3G4 9.6 High Standard Mid Low High High Mid (Factory Set) Low ARNU123B3G High Standard Mid Low High High Mid (Factory Set) Low ARNU153B3G High Standard Mid Low Ducted Built In Table 66: B4 Unit External Static Pressure Ranges. Model Capacity (MBh) Mode Setting Value Standard ESP (in. wg) CFM Min. ESP (in. wg) Max. ESP (in. wg) High High Mid (Factory Set) Low ARNU183B4G High Standard Mid Low High High Mid (Factory Set) Low ARNU243B4G High Standard Mid Low BUILT IN 95

96 DUCTED BUILT IN Figure 43: Sound Pressure Measurement Location. Ceiling 6.6ft Microphone 4.9ft Measurements are taken 4.9 ft away from the front of the unit. Sound pressure levels are measured in db(a) with a tolerance of ±3. Sound pressure levels are tested in an anechoic chamber under ISO Standard Operating Conditions: Power source: 220V/60 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. MULTI V Ducted Indoor Unit Engineering Manual Table 67: Ducted Built In Indoor Unit Sound Pressure Levels. Sound Pressure Levels db(a) Model High Fan Speed Medium Fan Speed Low Fan Speed ARNU073B3G ARNU093B3G ARNU123B3G ARNU153B3G ARNU183B4G ARNU243B4G Figure 44: ARNU073B3G4, ARNU093B3G4, and ARNU123B3G4 Sound Pressure Level Diagrams. ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 96 BUILT IN

97 DUCTED BUILT IN Figure 45: ARNU153B3G4, ARNU183B4G4, and ARNU243B4G4 Sound Pressure Level Diagrams. ARNU153B3G4 ARNU183B4G4 ARNU243B4G4 Sound Power Levels Table 68: Ducted Built In Indoor Unit Sound Power Levels. Model Sound Power Levels db(a) ARNU073B3G4 53 ARNU093B3G4 54 ARNU123B3G4 55 ARNU153B3G4 60 ARNU183B4G4 61 ARNU243B4G4 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. 2 Ducted Built In BUILT IN 97

98 DUCTED BUILT IN Figure 46: ARNU073B3G4, ARNU093B3G4, and ARNU123B3G4 Sound Power Level Diagrams. ARNU073B3G4 ARNU093B3G4 ARNU123B3G4 MULTI V Ducted Indoor Unit Engineering Manual Figure 47: ARNU153B3G4, ARNU183B4G4, and ARNU243B4G4 Sound Power Level Diagrams. ARNU153B3G4 ARNU183B4G4 ARNU243B4G4 98 BUILT IN

99 DUCTED BUILT IN ARNU073B3G4, ARNU093B3G4, ARNU123B3G4 Table 69: ARNU073B3G4, ARNU093B3G4, ARNU123B3G4 Cooling Capacity Table. Model No. / Capacity Index ARNU073B3G4 / 7.5 ARNU093B3G4 / 9.6 ARNU123B3G4 / 12.3 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Ducted Built In BUILT IN 99

100 DUCTED BUILT IN ARNU153B3G4, ARNU183B4G4, ARNU243B4G4 MULTI V Ducted Indoor Unit Engineering Manual Table 70: ARNU153B3G4, ARNU183B4G4, ARNU243B4G4 Cooling Capacity Table. Model No. / Capacity Index ARNU153B3G4 / 15.4 ARNU183B4G4 / 19.1 ARNU243B4G4 / 24.2 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). 100 BUILT IN

101 DUCTED BUILT IN ARNU073B3G4, ARNU093B3G4, ARNU123B3G4, ARNU153B3G4 Table 71: ARNU073B3G4, ARNU093B3G4, ARNU123B3G4, ARNU153B3G4 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 ARNU073B3G4 / 7.5 ARNU093B3G4 / 9.6 ARNU123B3G4 / 12.3 ARNU153B3G4 / 15.4 TC: Total Capacity (MBh) Ducted Built In BUILT IN 101

102 DUCTED BUILT IN ARNU183B4G4, ARNU243B4G4 MULTI V Ducted Indoor Unit Engineering Manual Table 72: ARNU183B4G4, ARNU243B4G4 Heating Capacity Table. Model No. / Outdoor Air Temp Indoor Air Temperature ( F DB) Capacity Index F DB F WB TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh TC MBh ARNU183B4G4 / ARNU243B4G4 / 24.2 TC: Total Capacity (MBh) BUILT IN

103 Ducted Built In DUCTED BUILT IN Table 73: Optional Accessories for Ducted Built In Indoor Units. Accessory Return Air Grille Return Air Canvas All accessories are sold separately. Model Number PBSGB30 (For 7~15MBh Ducted Built In Indoor Units [B3 Frames]) PBSGB40 (For 18-24MBh Ducted Built In Indoor Units [B4 Frames]) PBSC30 (For 7~15MBh Ducted Built In Indoor Units [B3 Frames]) PBSC40 (For 18-24MBh Ducted Built In Indoor Units [B4 Frames]) BUILT IN 103

104 MULTI V Ducted Indoor Unit Engineering Manual 104 BUILT IN

105 VERTICAL / HORIZONTAL AIR HANDLER Mechanical Specifications on page 106 General Data on page 108 Electrical Data on page 110 External Dimensions on page 111 Electrical Wiring Diagram on page 113 Refrigerant Flow Diagrams on page 117 External Static Pressure and Air Flow on page 118 External Static Pressure Ranges on page 119 Heater Capacity Airflow / Static Pressure Drop Factors on page 120 Acoustic Data on page 121 Capacity Tables on page 125 Optional Accessories on page 130

106 VERTICAL / HORIZONTAL AIR HANDLER MULTI V Ducted Indoor Unit Engineering Manual Casing The unit is designed to operate in the vertical up flow configuration or horizontal left end supply air. Return air opening is on the bottom in the vertical position or right end in the horizontal position. Return air plenum sub-base is to be field-provided. The supply air connection is male flange. The unit case is made of 22-gauge coated metal and the external surfaces are finished with a high gloss baked enamel finish. Finish color is morning fog (medium beige). Cold surfaces are galvanized steel. The cold surfaces of the case are internally insulated with ½ inch foil faced, polystyrene fiber insulation. The inside surface of the fan assembly door access panel is treated with ½ inch polystyrene fiber insulation, encapsulated on both sides, and sealed along the edges with a reinforced foil-faced covering to prevent deterioration caused by panel removal. All access panels are provided with gasket seals to minimize air leakage. The unit case is designed to accept an internal, optional, LG electric strip heater. The unit bears the ETL label. Unit breaker, fuses, and / or disconnect are provided by others. Fan Assembly and Control The indoor unit has an integral fan assembly consisting of a galvanized steel housing and a forward-curved fan wheel. The direct drive fan/motor assembly is mounted on rubber grommets isolating the rotating assembly from the fan housing. The fan motor is a Brushless Digitally-Controlled design (BLDC), having 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. Fan speed is controlled using a microprocessor-based direct digital control algorithm that provides a minimum of 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 and DIP switch settings will allow the fan to run constantly during defrost or oil return modes. Each setting can be field adjusted from the factory setting (RPM/ESP). The setting provides delivery of the high speed air volume against an external static pressure of up to 1.0 in-wg. temperature safety switch, and interconnecting control wiring harness with a quick connect plug for easy connection to the air handler control board. Auxiliary heat modules are available in nominal capacities of 5, 10, 15, and 20 kw at 230/60/1. Heating elements are powered from a field provided separate power source. 5 and 10 kw modules are powered from a single power wire. The 15 and 20 kw modules are powered from two power wires. Heating module breakers, fuses, and / or disconnects are to be field provided. Electric Heat Module Controls The electric heat module is capable of operating at full capacity during system defrost and oil return operations. When the air handler is operating in the Cooling, Dry, or Fan Only modes, the electric heater operation is locked out and unavailable. When the air handler is operating in the Heating mode, the heater is field selectable to operate when the room temperature is 2 F lower than set-point or manually if provided with a start/stop signal from a third-party outside source. Microprocessor Controls The unit is equipped with an integrated microprocessor-based controller capable of performing functions necessary to operate the system without the use of a wall-mounted controller. A temperature thermistor is mounted in the return air stream. All unit operating 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 (RS-485). The microprocessor control provides the following functions: auto addressing, selfdiagnostics, auto restart following power restoration, and will operate the indoor unit using one of the following five operation modes: Air Filter The unit comes with a filter rack capable of accepting a fieldprovided 16 x 20 x 1 (NJ chassis) or 24 x 20 x 1 (NK chassis) filter cartridge. The filter rack is equipped with guides that keep the filter centered in the rack. Filter service access is from the front of the unit without removing the coil or fan area access panels. Filter access door is provided with thumb screws that can be removed. Optional Auxiliary Electric Heat Module(s) LG optional electric heat modules are designed for field installation in the reheat position. The electric heat module is provided with heating elements, contractors, relays, high 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. 106 VAH

107 VERTICAL / HORIZONTAL AIR HANDLER In Heating mode, the microprocessor control does not begin fan operation until coil pipe temperature reaches 76ºF. Significant airflow is generated when pipe temperature reaches 80 F. A field-selectable option maintains fan operation for 30 minutes following cooling cycle operations. 1. Wall-mounted wire controller 2. Factory-mounted return air thermistor or the optional wallmounted wired remote temperature sensor. 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. A single indoor unit has the capability of being controlled by up to two local wired controllers. The microprocessor control provides a cooling or heating mode test cycle that operates the unit for 18 minutes without regard to the space temperature. If the system is provided with an optional local or central controller, displayed diagnostic codes are specific and provide the service technician with the reason for the code displayed. Handling Condensate The drain pan is designed to work with a gravity building drain system. If condensate lifts/pumps are needed, they are to be field-provided. A secondary drain port plug is provided allowing the pan to be drained for service. Condensate float safety switch connections are available on the main control board for connection of a field supplied float safety switch. Condensate Drain Pan The condensate drain pan is constructed of HIPS (high impact polystyrene resin). Coil The indoor unit coil is constructed with grooved design copper tubes with slit coil fins, 2 to 3 rows, 18 fins per inch. Controls Features Auto changeover (Heat Recovery only) Auto operation Auto restart External on / off control Dual thermistor control External static pressure control Group control Hot start Self diagnostics Timer (on / off) Weekly schedule Fan speed control Dual set-point control* Filter life and power consumption display* Multiple auxiliary heater applications* Vertical / Horizontal Air Handler VAH 107

108 VERTICAL / HORIZONTAL AIR HANDLER General Data MULTI V Ducted Indoor Unit Engineering Manual Table 74: Vertical / Horizontal (NJ Frame) Air Handler Unit General Data. Model No. ARNU123NJA4 ARNU183NJA4 ARNU243NJA4 ARNU303NJA4 ARNU363NJA4 Capacity (Btu/h) 12,000 18,000 24,000 30,000 36,000 Power Input 1 (W) Capacity (Btu/h) 13,500 20,000 27,000 34,000 40,000 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A R410A R410A Refrigerant Control EEV EEV EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 42 / 41 / / 42 / / 42 / / 43 / / 44 / 43 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 530 / 480 / / 530 / / 640 / / 800 / / 880 / 800 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 530 / 480 / / 530 / / 640 / / 800 / / 880 / 800 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) Liquid Line (in., O.D.) 1/4 Brazed 1/4 Brazed 3/8 Brazed 3/8 Brazed 3/8 Brazed Vapor Line (in., O.D.) 1/2 Brazed 1/2 Brazed 5/8 Brazed 5/8 Brazed 5/8 Brazed 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 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. 108 VAH

109 VERTICAL / HORIZONTAL AIR HANDLER General Data Table 75: Vertical / Horizontal (NK Frame) Air Handler Unit General Data. Model No. ARNU423NKA4 ARNU483NKA4 ARNU543NKA4 Capacity (Btu/h) 42,000 48,000 54,000 Power Input 1 (W) Capacity (Btu/h) 46,000 54,000 60,000 Power Input 1 (W) Cooling Max. ( F WB) Heating Min. ( F DB) Refrigerant Type 2 R410A R410A R410A Refrigerant Control EEV EEV EEV Sound Pressure 3 db(a) (H/M/L) 46 / 44 / / 47 / / 49 / 47 Net Unit Weight (lbs.) Shipping Weight (lbs.) Communication Cable 4 (No. x AWG) 2 x 18 2 x 18 2 x 18 Type Sirocco Sirocco Sirocco Motor Housing Motor/Drive Brushless Digitally Controlled / Direct Airflow Rate H/M/L (CFM) Standard Mode 1,250 / 1,100 / 1,000 1,400 / 1,260 / 1,000 1,475 / 1,400 / 1,260 Airflow Rate H/M/L (CFM) High Mode (Factory Set) 1,250 / 1,100 / 1,000 1,400 / 1,260 / 1,000 1,475 / 1,400 / 1,260 External Static Pressure (in. wg) Standard Mode External Static Pressure (in. wg) High Mode (Factory Set) Liquid Line (in., O.D.) 3/8 Brazed 3/8 Brazed 3/8 Brazed Vapor Line (in., O.D.) 5/8 Brazed 5/8 Brazed 5/8 Brazed 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 0 ft above sea level, with 25 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. All capacities are net with a combination ratio between %. Cooling capacity rating obtained with air entering the indoor coil at 80ºF 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 70ºF 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 R410A refrigerant according to applicable regulations (40 CFR Part 82, Subpart F) under section 608 of CAA. 3 Sound Pressure levels are tested in an anechoic chamber under ISO Standard All communication cable to be minimum 18 AWG, 2-conductor, stranded, shielded and must comply with applicable and national code. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. Vertical / Horizontal Air Handler VAH 109

110 VERTICAL / HORIZONTAL AIR HANDLER Electrical Data MULTI V Ducted Indoor Unit Engineering Manual Table 76: Vertical / Horizontal (NJ, NK Frames) Air Handler Unit Electrical Data. Model Voltage Range MCA MOP Rated Amps (A) Power Supply Power Input (W) Hz Volts Phase Cooling Heating ARNU123NJA ARNU183NJA ARNU243NJA ARNU303NJA ARNU363NJA ARNU423NKA ARNU483NKA ARNU543NKA 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. 110 VAH

111 VERTICAL / HORIZONTAL AIR HANDLER NJ Frame Figure 48: ARNU123~363NJA4 Dimensions. Supply Air opening 48-11/ / / / /8 1-15/ /4 TOP VIEW 2-1/8 2-1/16 1-5/8 7/8 Wiring knockouts 1-11/16 Wiring knockouts 1-9/16 7/8 Wiring knockouts 49-5/ /16 2-9/16 SIDE VIEW Liquid pipe Vapor pipe Vertical / Horizontal Air Handler Drain connection for upflow application Return Air opening 14-5/16 1-1/2 4-11/16 BOTTOM VIEW Unit: inches Note: All measurements have a tolerance of ±1/4 in. Drain connection for horizontal application 9-15/16 13 FRONT VIEW 1-9/16 VAH 111

112 VERTICAL / HORIZONTAL AIR HANDLER NK Frame Figure 49: ARNU423~543NKA4 Dimensions. Supply Air opening 55-3/16 MULTI V Ducted Indoor Unit Engineering Manual /4 12-1/8 21-1/4 25 Return Air opening 1-9/ /16 2-1/16 2-3/16 1-5/8 7/8 Wiring knockouts 1-11/16 Wiring knockouts 1-9/ /16 7/8 Wiring knockouts 55-3/16 2-9/ /4 1-1/2 SIDE VIEW Liquid pipe Vapor pipe Drain connection for upflow application Unit: inches Note: All measurements have a tolerance of ±1/4 in. Drain connection for horizontal application 4-11/ /16 20 FRONT VIEW 1-9/ VAH

113 Vertical / Horizontal Air Handler VERTICAL / HORIZONTAL AIR HANDLER Electrical Wiring Diagram NJ Frame Figure 50: ARNU123~363NJA4 Wiring Diagram. VAH 113

114 VERTICAL / HORIZONTAL AIR HANDLER Electrical Wiring Diagram NJ Frame MULTI V Ducted Indoor Unit Engineering Manual Table 77: NJ Frame Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC RV-VM Sub PC power supply Power supply connection CN_OUT Heater Connection for heater CN-FLOAT Float switch input Float switch sensing CN-ZONE Zone controller Zone controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-EXT External ON / OFF controller External ON / OFF controller connection CN-DISPLAY Display Display of indoor status CN-CC Dry contact Dry Contact connection CN-PTC Auxiliary heater Auxiliary heater connection CN-PIPE/OUT (RD) Discharge pipe sensor Pipe out thermistor CN-LEAK (VI) Refrigerant leak detector Refrigerant leak detector connection CN-PIPE/IN (WH) Suction pipe sensor Pipe in thermistor CN-REMO (GN) Wired remote controller Wired remote control connection CN-ROOM (YL) Room sensor Room air thermistor CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Table 78: NJ Frame DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave SW4 DRY CONTACT MODE Variable Auto SW5 CONTINUOUS FAN Off On SW6 HEATER INTERLOCK Off On Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off Selects heater interlock function for vertical air handler units 1. On: Automatic (heater will automatically operate during heating mode) 2. Off: Manual (heater needs to be manually turned on during heating mode) *For Gen 4 Multi V vertical air handler indoor units, DIP switches 1, 2, 7 and 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV Engineering Manual for additional information. 114 VAH

115 Vertical / Horizontal Air Handler VERTICAL / HORIZONTAL AIR HANDLER Electrical Wiring Diagram NK Frame Figure 51: ARNU423~543NKA4 Wiring Diagram. VAH 115

116 VERTICAL / HORIZONTAL AIR HANDLER Electrical Wiring Diagram NK Frame MULTI V Ducted Indoor Unit Engineering Manual Table 79: NK Frame Wiring Diagram Legend. Terminal Purpose Function CN-POWER AC Power supply AC Power line CN-MOTOR1 Fan motor output Motor output of BLDC RV-VM Sub PC power supply Power supply connection CN_OUT Heater Connection for heater CN-FLOAT Float switch input Float switch sensing CN-ZONE Zone controller Zone controller connection CN-EEV EEV Output EEV control output CN-OPTION Optional PCB EPROM Option PCB connection CN-EXT External ON / OFF controller External ON / OFF controller connection CN-DISPLAY Display Display of indoor status CN-CC Dry contact Dry Contact connection CN-PTC Auxiliary heater Auxiliary heater connection CN-PIPE/OUT (RD) Discharge pipe sensor Pipe out thermistor CN-LEAK (VI) Refrigerant leak detector Refrigerant leak detector connection CN-PIPE/IN (WH) Suction pipe sensor Pipe in thermistor CN-REMO (GN) Wired remote controller Wired remote control connection CN-ROOM (YL) Room sensor Room air thermistor CN-D/PUMP Drain pump output AC output for drain pump CN-485 Communication Connection between indoor and outdoor units Table 80: NK Frame DIP Switch Settings. DIP Switch Setting Off On Remarks SW3 GROUP CONTROL Master Slave SW4 DRY CONTACT MODE Variable Auto SW5 CONTINUOUS FAN Off On SW6 HEATER INTERLOCK Off On Group control setting using 7-Day Programmable Controller; selects Master / Slave on each indoor unit Sets operation mode for optional Dry Contact accessory 1. Variable: Auto or Manual Mode can be set through 7-Day Programmable Controller or Wireless Remote Controller (factory default setting is Auto if there is no setting) 2. Auto: For Dry Contact, it is always Auto mode Selects continuous fan for ducted indoor units. 1. On: Indoor unit fan will always operate at a set fan speed, except when the system is off, or the outdoor unit is in defrost mode (when the outdoor unit is in defrost mode, the fan will operate at super low fan speed) 2. Off: Indoor unit fan speed can be changed by on / off Selects heater interlock function for vertical air handler units 1. On: Automatic (heater will automatically operate during heating mode) 2. Off: Manual (heater needs to be manually turned on during heating mode) *For Gen 4 Multi V vertical air handler indoor units, DIP switches 1, 2, 7 and 8 must be set to OFF. These DIP switches are used for other models. **To enable Generation 4 features, outdoor unit DIP Switch No. 3 must be set to ON. Please refer to the Multi V IV, Multi V Water IV Engineering Manual for additional information. 116 VAH

117 VERTICAL / HORIZONTAL AIR HANDLER Refrigerant Flow Diagram Figure 52: NJ, NK Frame Refrigerant Flow Diagram. Sirroco Fan Heat Exchanger EEV Filter Cooling Heating TH3 TH2 TH1 Filter lndoor unit Table 81: NJ, NK Frame Refrigerant Pipe Connection Port Diameters. Model Liquid (inch) Vapor (inch) ARNU123NJA4 ARNU183NJA4 1/4 Brazed 1/2 Brazed ARNU243NJA4 ARNU303NJA4 ARNU363NJA4 ARNU423NKA4 3/8 Brazed 5/8 Brazed ARNU483NKA4 ARNU543NKA4 3/8 Brazed 5/8 Brazed Vertical / Horizontal Air Handler Table 82: NJ, NK Frame Thermistors. Thermistor TH1 TH2 TH3 Description Return air thermistor Pipe in thermistor Pipe out thermistor VAH 117

118 VERTICAL / HORIZONTAL AIR HANDLER Figure 53: NJ Frame External Static Pressure and Air Flow Chart (in wg) 0.6 (in wg) 0.5 (in wg) 0.4 (in wg) 0.3 (in wg) MULTI V Ducted Indoor Unit Engineering Manual Pressure CFM Figure 54: NK Frame External Static Pressure and Air Flow Chart Pressure (in wg) 0.1 (in wg) 0.8 (in wg) 0.7 (in wg) 0.6 (in wg) 0.5 (in wg) 0.4 (in wg) 0.3 (in wg) 0.2 (in wg) 0.1 (in wg) CFM 118 VAH

119 VERTICAL / HORIZONTAL AIR HANDLER Table 83: NJ Frame External Static Pressure and Air Flow Table. Model No. / Capacity (MBh) ARNU123NJA / 12 ARNU183NJA4 / 18 ARNU243NJA4 / 24 ARNU303NJA4 / 30 ARNU363NJA4 / 36 Flow Rate Static Pressure (in. WG) Mode CFM High 530 ** *92 *92 *92 Mid 480 ** *92 *92 *92 Low 380 ** *92 *92 *92 High 580 ** *95 *95 *95 Mid 530 ** *92 *92 *92 Low 480 ** *92 *92 *92 High *98 *98 *98 Mid *96 *96 *96 Low 480 ** *92 *92 *92 High *103 *103 *103 Mid *101 *101 *101 Low *96 *96 *96 High *103 *103 *103 *103 Mid *103 *103 *103 Low *101 *101 *101 Table 84: NK Frame External Static Pressure and Air Flow Table. Model No. / Capacity (MBh) ARNU423NKA4 / 42 ARNU483NKA4 / 48 ARNU543NKA4 / 54 * Flow rate (CFM) decreases by 3% per 0.1 in. WG. ** Fan external static pressure is at minimum value. Flow Rate Static Pressure (in. WG) Mode CFM High 1, *115 *115 Mid 1, Low 1, High 1, *115 *115 Mid 1, *115 Low 1, High 1, *115 *115 Mid 1, *115 *115 Low 1, * tons of capacity, then ESP value should be increased by tons of capacity, then The ESP value should be increased by 5. Factory Default is high static pressure. High static pressure is 0.5 in wg. Low static pressure is 0.3 in wg. Vertical / Horizontal Air Handler VAH 119

120 VERTICAL / HORIZONTAL AIR HANDLER MULTI V Ducted Indoor Unit Engineering Manual Table 85: Capacity (MBh [tons]) Heater Capacity (kw) (1.0) 380 Not available Not available Not available 18 (1.5) 380 Not available Not available Not available 24 (2.0) Not available Not available 30 (2.5) Not available Not available 36 (3.0) Not available Not available 42 (3.5) 1,000 1,000 1,000 1, (4.0) 1,000 1,000 1,000 1, (4.5) 1,300 1,300 1,300 1,300 Airflow rates in the table above are listed in CFM. Flow rate (CFM) is decreased by 3% per 0.1 in wg from 0.8 in wg to 1.0 in wg. Table 86: Electric Heater Static Pressure Drop Factors. Heater Capacity (kw) Static Pressure Drop (in. wg) in wg = inch water gauge If the electric heater has been installed, then the ESP value has to be set. For every increase in static pressure by 0.01 in wg, the ESP value should be increased by 1. If the ESP setting value is inappropriate, the provided safety device will turn the heater off according to the airflow. Table 87: Air Filter Static Pressure Drop Factors. Capacity (MBh(tons)) Flow Rate (CFM) Static Pressure Drop (in wg) High (480) (1.0) Middle (380) Low (380) High(530) (1.5) Middle(480) Low(380) High(710) (2.0) Middle(640) Low(480) High(880) (2.5) Middle(800) Low(630) High(990) (3.0) Middle(880) Low(800) High(1250) (3.5) Middle(1100) Low(1000) High(1400) (4.0) Middle(1260) Low(1000) High(1475) (4.5) Middle(1400) Low(1260) If the air filter has been installed, the ESP value has to be set. For every increase in static pressure by 0.01 in. wg, the ESP value should be increased by VAH

121 VERTICAL / HORIZONTAL AIR HANDLER Figure 55: Sound Pressure Measurement Location. Microphone 3.3ft Measurements are taken 3.3 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: 220V/60 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. 3.3ft Table 88: Vertical / Horizontal Air Handler Unit Sound Pressure Levels. Model Sound Pressure Levels db(a) High Fan Speed Medium Fan Speed Low Fan Speed ARNU123NJA ARNU183NJA ARNU243NJA ARNU303NJA ARNU363NJA ARNU423NKA ARNU483NKA ARNU543NKA Figure 56: ARNU123NJA4, ARNU183NJA4, and ARNU243NJA4 Sound Pressure Level Diagrams. ARNU123NJA4 ARNU183NJA4 ARNU243NJA4 Vertical / Horizontal Air Handler VAH 121

122 VERTICAL / HORIZONTAL AIR HANDLER Figure 57: ARNU303NJA4, ARNU363NJA4, and ARNU423NKA4 Sound Pressure Level Diagrams. ARNU303NJA4 ARNU363NJA4 ARNU423NKA4 MULTI V Ducted Indoor Unit Engineering Manual Figure 58: ARNU483NKA4 and ARNU543NKA4 Sound Pressure Level Diagrams. ARNU483NKA4 ARNU543NKA4 122 VAH

123 VERTICAL / HORIZONTAL AIR HANDLER Sound Power Levels Table 89: Vertical / Horizontal Air Handler Unit Sound Power Levels. Model Sound Power Levels db(a) High Fan Speed ARNU123NJA4 59 ARNU183NJA4 59 ARNU243NJA4 60 ARNU303NJA4 60 ARNU363NJA4 61 ARNU423NKA4 61 ARNU483NKA4 62 ARNU543NKA4 63 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. 2 Figure 59: ARNU123NJA4, ARNU183NJA4, and ARNU243NJA4 Sound Power Level Diagrams. ARNU123NJA4 ARNU183NJA4 ARNU243NJA4 Vertical / Horizontal Air Handler VAH 123

124 VERTICAL / HORIZONTAL AIR HANDLER Figure 60: ARNU303NJA4, ARNU363NJA4, and ARNU423NKA4 Sound Power Level Diagrams. ARNU303NJA4 ARNU363NJA4 ARNU423NKA4 MULTI V Ducted Indoor Unit Engineering Manual Figure 61: ARNU483NKA4 and ARNU543NKA4 Sound Power Level Diagrams. ARNU483NKA4 ARNU543NKA4 124 VAH

125 VERTICAL / HORIZONTAL AIR HANDLER ARNU123NJA4, ARNU183NJA4, ARNU243NJA4 Table 90: ARNU123NJA4, ARNU183NJA4, ARNU243NJA4 Cooling Capacity Table. Model No. / Capacity Index ARNU123NJA4 / 12.0 ARNU183NJA4 / 18.0 ARNU243NJA4 / 24.0 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Vertical / Horizontal Air Handler VAH 125

126 VERTICAL / HORIZONTAL AIR HANDLER ARNU303NJA4, ARNU363NJA4, ARNU423NKA4 MULTI V Ducted Indoor Unit Engineering Manual Table 91: ARNU303NJA4, ARNU363NJA4, ARNU423NKA4 Cooling Capacity Table. Model No. / Capacity Index ARNU303NJA4 / 30.0 ARNU363NJA4 / 36.0 ARNU42NKA4 / 42.0 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). 126 VAH

127 VERTICAL / HORIZONTAL AIR HANDLER ARNU483NKA4, ARNU543NKA4 Table 92: ARNU483NKA4, ARNU543NKA4 Cooling Capacity Table. Model No. / Capacity Index ARNU483NKA4 / 48.0 ARNU543NKA4 / 54.0 Outdoor Air Temp. ( F DB) Indoor Air Temperature ( F DB / WB) 68 / / / / / / / 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). Vertical / Horizontal Air Handler VAH 127

128 VERTICAL / HORIZONTAL AIR HANDLER ARNU123NJA4, ARNU183NJA4, ARNU243NJA4, ARNU303NJA4 MULTI V Ducted Indoor Unit Engineering Manual Table 93: ARNU073B3G4, ARNU093B3G4, ARNU123B3G4, ARNU153B3G4 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 ARNU123NJA4 / 12.0 ARNU183NJA4 / 18.0 ARNU243NJA4 / 24.0 ARNU303NJA4 / 30.0 TC: Total Capacity (MBh) VAH

129 VERTICAL / HORIZONTAL AIR HANDLER ARNU363NJA4, ARNU423NKA4, ARNU483NKA4, ARNU543NKA4 Table 94: ARNU363NJA4, ARNU423NKA4, ARNU483NKA4, ARNU542NKA4 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 ARNU363NJA4 / 36.0 ARNU42NKA4 / 42.0 ARNU483NKA4 / 48.0 ARNU543NKA4 / 54.0 TC: Total Capacity (MBh) Vertical / Horizontal Air Handler VAH 129

130 VERTICAL / HORIZONTAL AIR HANDLER Table 95: Optional Accessories for Vertical / Horizontal Air Handler Units. Accessory 5kW Electric Heater 10kW Electric Heater 15kW Electric Heater 20kW Electric Heater All accessories are sold separately. Model Number ANEH053B1 ANEH103B2 ANEH153B2 ANEH203B2 MULTI V Ducted Indoor Unit Engineering Manual Figure 62: Electric Heater. Example: 5kW Capacity Heater Bi metal Bracket Terminal Block Heater Coil Relay Heater Cable Table 96: Electric Heater Capacities. Indoor Unit Model No. / Capacity (MBh) Model Number / Heater Capacity ANEH053B1 (5kW) ANEH103B2 (10kW) ANEH153B2 (15kW) ANEH203B2 (20kW) ARNU123NJA4 (12) X Not available Not available Not available ARNU183NJA4 (18) X Not available Not available Not available ARNU243NJA4 (24) X X Not available Not available ARNU303NJA4 (30) X X Not available Not available ARNU363NJA4 (36) X X Not available Not available ARNU423NKA4 (42) X X X X ARNU483NKA4 (48) X X X X ARNU543NKA4 (54) X X X X For additional information, refer to the Electric Heater Manual. 130 VAH

131 APPLICATION GUIDELINES Selecting the Best Location on page 132 General Mounting - High, Low, and Built In Ducted Units on page 134 General Mounting - Vertical / Horizontal Air Handling Units on page 136 General Drain Piping Information on page 138 Wiring Guidelines on page 140 Wired Controller Location on page 142 Acronyms on page 143

132 APPLICATION GUIDELINES MULTI V Ducted Indoor Unit Engineering Manual Selecting the Best Location Do s Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily and to minimize the length of the condensate drain piping. Place the unit where noise prevention is taken into consideration. Place the unit in a location that can support a load four times the indoor unit weight, and where the indoor unit can be level. 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 The unit may be damaged, may malfunction, and / or will not operate as designed if installed in any of the conditions listed. Figure 63: Selecting the Best Location / Recommended Clearance Requirements (for High Static, Low Static, Built In Ducted Units). Unit: inch Figure 64: Recommended Clearances for Vertical / Horizontal Air Handler Units. Minimum 14 inches More than 23-5/8 inches Front Service access 23-5/8 x 23-5/8 Control box 39-3/8 Minumim 13/16 for High and Low Static Ducted Units Minimum 14 inches Rear 0 inches 0 inches* 23-5/8 0 inches* *When using top panel access holes for power wiring / communications cable 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: Figure 65: Installing Near a Heat or Steam Source. Indoor Unit 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. Include enough distance Heat or steam source Install a ventilation fan with sufficient capacity 132 GUIDELINES

133 APPLICATION GUIDELINES Figure 66: Service Clearances for High Static Ducted Units. Figure 67: Service Clearances for Low Static and Built In Ducted Units. Service access 23-5/8 x 23-5/8 Control box A (Minimum) B (Minimum) B Unit: inch A Figure 68: Recommended Clearances for Built In Ducted Units with Accessories. Minimum 7-5/8 With Return Air Grille Service Space B A Ceiling Application Guidelines Minimum 7-5/8 With Return Air Grille and Return Air Canvas Duct Kit Refer to Return Air Grille and Return Air Canvas Installation Manual for detail installation of built in ducted units. Unit: inch Table 97: Service Clearance Dimensions For High Static, Low Static, and Built In Ducted Units. Frame Dimensions (inches) A B BH 23-5/8 23-5/8 BG 23-5/8 23-5/8 BR 23-5/8 23-5/8 B8 23-5/8 23-5/8 L1 31-1/2 31-1/2 L2 31-1/2 39-3/8 L3 31-1/2 47-1/4 B3 23-5/8 32-5/8 B4 23-5/8 43-5/16 GUIDELINES 133

134 APPLICATION GUIDELINES MULTI V Ducted Indoor Unit Engineering Manual General Mounting - High, Low, and Built In Ducted Units The ceiling should be strong and solid enough to protect the indoor unit from vibration. Refer to dimensions table below for each indoor unit type. Apply a joint-canvas between the unit and duct to absorb unnecessary vibration. Figure 69: High Static Ducted BH, BG, BR Frame Bolt Locations. A B I H G C D E F Drainage Point Apply a filter accessory at the air return opening. Install the unit with a slope towards the drainage point to ensure condensate drains easily. Figure 70: High Static Ducted B8 Frame Bolt Locations. A B K L F J Table 98: High Static Ducted BH, BG, BR, B8 Frame Suspension Bolt Positions. Frame Dimensions (inches) A B C D E F G H I J K L BH 36-11/ / /8 17-3/4 1-3/16 3-7/ /2 6-1/ BG 48-9/ / /8 17-3/4 1-3/16 3-7/ /16 7-5/ BR 50-7/ / /4 2-3/ /4 1-3/ / /8 11-9/ B8 63-7/8 61-5/8 22-7/8 11-1/2 27-3/8 55-1/8 18-1/8 44-3/ / /8 17-9/16 5/8 Table 99: Low Static L1, L2, L3 Suspension Bolt Positions. EC G D Frame Dimension (inches) A B C D E F G H I J L1 28-7/8 30-7/ /4 27-9/16 1-7/16 7-1/2 13/ /8 27-9/16 L2 36-3/4 38-5/ /4 27-9/16 1-7/16 7-1/2 13/ /8 6-1/8 35-7/16 L3 44-5/8 46-3/ /4 27-9/16 1-7/16 7-1/2 13/ /4 6-1/8 43-5/16 D E C H I Figure 71: Low Static Ducted Bolt Locations. G J A B F I 134 GUIDELINES H Drain Hole

135 APPLICATION GUIDELINES Table 100: Built In Ducted Suspension Bolt Positions. Dimensions (inches) Frame A B C D E F G H I J B3 33-7/ / /8 3-11/16 7-1/2 7/8 31-5/16 6-7/ /8 B4 44-7/ / /8 3-11/16 7-1/2 7/ /16 6-7/ /16 Figure 72: Built In Ducted Bolt Locations. B A J G E C D General Mounting Procedure 1. Select and mark the areas where the hanging bolts should be placed. 2. Drill the holes. 3. Install the unit horizontally using a level gauge. Figure 74: Hanging Bolt Installation. Hanging bolt (W3/8 or M10) Nut (W3/8 or M10) Spring washer (M10) Flat washer for M10 (accessory) Drainage point Figure 73: Drilling Holes for the Hanging Bolts. H I F Application Guidelines The following parts are field supplied: Spring washer - M10 Flat washer for M10 (accessory) Nut (W3/8 or M10) Included with the indoor unit: Flat washer - M Figure 75: Old Versus New Building Hanging Bolt Installation. Old Building 1 Set Anchor 2 Plate Washer 3 Spring Washer 4 Nut 5 Hanging Bolts New Building GUIDELINES 135

136 APPLICATION GUIDELINES MULTI V Ducted Indoor Unit Engineering Manual General Mounting - Vertical / Horizontal Air Handler Units Vertical / horizontal air handler units can be installed either in an upflow or a horizontal-left position. General Guidelines Support platforms should be sturdy enough to support the air handler unit plus any accessories including filter boxes. The size of the support should be bigger than the air handler unit; the unit itself should be placed at the center of the support. Vibration isolators (field-supplied) must be installed between the air handler unit and the support(s). Upflow installation has to be applied if a return plenum and a supply duct are present. Secure the plenum to support adapters and duct work. To prevent air leaks, seal all ducts following local codes. Follow all relevant building codes in installations in which an external condensate pan may be necessary. Supports for air handler units should be located in or above the external condensate pan. Specific Guidelines for Horizontal-Left Installation Units should not be installed where the access panels face up or down, nor where filter access is obstructed. If the air handler unit is suspended, use angled steel brackets with threaded rods as support.. Figure 76: Field-Supplied Supply Duct Field-Supplied Return Plenum Figure 77: Horizontal-Left Installation. Field-Supplied Supply Duct More than 1-1/2 inch X 1-1/2 inch angle Recommended length more than 26 inch with 2 inch clearance on both sides of unit Table 101: Horizontal-Left Installation Dimensions. Model No. Capacity (Btu/h) ARNU123NJA2 12,000 ARNU183NJA2 18,000 ARNU243NJA2 24,000 ARNU303NJA2 30,000 ARNU363NJA2 36,000 ARNU423NKA2 42,000 ARNU483NKA2 48,000 ARNU543NKA2 54,000 More than 3/8 inch threaded rod C Suspension Support Locations B Field-Supplied Return Plenum Dimensions (inches) A B C / A 136 GUIDELINES

137 APPLICATION GUIDELINES Duct Work For Vertical / Horizontal Air Handler Units Use at least ten (10) M4-25L screws when attaching the supply duct to the vertical-horizontal air handler unit. Figure 78: Attaching Ducts to the Vertical / Horizontal Air Handler Unit. To prevent vibration transmission, install flexible connectors between the supply duct and the vertical-horizontal air handler unit. If an electrical heater is included, the flexible connector must be constructed from a heat-resistant material. When routed through unconditioned spaces, ducts must be insulated and covered with vapor barriers. Internal acoustical insulation lining may be necessary for a metal duct system if it does not have a 90 elbow and ten (10) feet of main duct to the first branch takeoff. At least ten (10) screws (M4-25L) Fibrous ducts could be used as a substitute if built and installed in accordance with the most recent edition of the Sheet Metal and Air Conditioning Contractors National Association (SMACNA) Construction Standard. Fibrous ducts and acoustical linings must follow National Fire Protection Association (NFPA) Standards 90A or 90B as tested by UL Standard 181 for Class 1 ducts. Seal around the ducts to prevent air leaks. At least six (6) screws (M-4-25L) More than 1 inch Application Guidelines Table 102: Vertical / Horizontal Air Handler Unit Duct Connection Dimensions Table. Dimensions (inches) Model No. A B C Height Width Depth D E F G H ARNU123NJA2 ARNU183NJA2 48-5/ /4 1-9/ / /8 ARNU243NJA2 ARNU303NJA2 ARNU363NJA2 ARNU423NKA2 48-5/ /4 1-9/ / /8 ARNU483NKA2 ARNU543NKA2 48-5/ /4 1-9/ / /8 Figure 79: Vertical / Horizontal Air Handler Unit Duct Connection Dimensions Diagram. Refrigerant Pipe Connections Drain Connections for Horizontal-Left Installation Air Filter Cover Front Drain Connections for Upflow Installation Right Side Bottom Top GUIDELINES 137

138 APPLICATION GUIDELINES General Drain Piping Information MULTI V Ducted Indoor Unit Engineering Manual General Drain Piping Information All ducted indoor units generate water during cooling operation, therefore, how to properly handle this condensation must be considered. 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. Ducted Unit Drain Information High Static, Low Static, and Built In Ducted indoor units include factory-installed drain pumps. When the bottom surface of the indoor unit is at an elevation below the receiving building drain line connection, install an inverted trap at the top of the condensate pump discharge riser before connection to the building drain pipe. When the receiving drain line is mounted horizontal, connect the inverted trap to the top half of the pipe. The connection point of the inverted trap to the building drain pipe should always be to the top half of the pipe and should never be over 45 either side of the upper most point of the horizontal building drain line. If connecting to a vertical drain line or plumbing system vent line, a vertical drain line include an inverted trap at the top of the IDU con- Vertical / Horizontal Air Handler Unit Drain Information Vertical / Horizontal Air Handler units have a gravity drain. drain lines. An additional external condensate line should run from the unit into the pan. The entire condensate line should be drained from the external condensate pan. Do not use pipe joint connection or PVC/CPVC for the unit drain tape. - Table 103: Indoor Unit BH, BG, BR, B8 Frame High Static Ducted L1, L2, L3 Frame Low Static Ducted B3, B4 Frame Built In Ducted NJ, NK Frame Vertical / Horizontal Air Handler Unit Drain Type 27-1/2 in. Lift Drain Pump, Factory Installed Gravity Drain Pipe Dia. (ID, in.) Ø1 Ø1 Figure 80: High Static, Low Static, Built In Ducted Indoor Unit Drain Pump to Drain Piping System. Metal clamp Drain pump Max /16 inches PVC Elbow Insulation Hanger distance 3.3~4.9 feet PVC Piping Flexible drain hose Hanger Bracket 1/50~1/100 slope Figure 81: Vertical / Horizontal Air Handler Unit Drain Piping System. Drain for Upflow Installations Horizontal-Left Drain Access Hole Air Filter Cover Supplementary drain with proper trap. (Fieldsupplied kit can be used.) Drain for Horizontal-Left Installations Main drain along with suitable trap. (A field-supplied trap with sufficient depth can be used. Standard-sized traps are not sufficient. Refer to the U-Trap Specifications figure for the recommended condensate trap.) Figure 82: Install the U-Trap to prevent leaks caused by blocking the intake air filter. Applied U-Trap Dimensions A 2-9/16 inch B 2C C 2 x SP SP = External Pressure (in. WG) Ex) External Pressure = 0.4 in. WG A 2-9/16 inches B 1-7/12 inches C 13/16 inches C A B U-Trap 3/4 inch connector Figure 83: Flexible Drain Hose Connection. Flexible Drain Hose Ducted indoor units and vertical / horizontal air handler units include a factory-provided flexible drain hose (with one or two clamps) to connect the indoor unit to the drain piping / drain piping system. 138 GUIDELINES

139 APPLICATION GUIDELINES General Drain Piping Information Drain Piping Drain piping must have down slope (1/50 to 1/100). Any holes through the ceilings, walls, etc., must be large enough to accommodate the drain piping and insulation. To prevent reversal flow, do not provide up and down slope. For High Static, Low Static, and Built In Ducted Units, the outside diameter of the drain connection on the indoor unit is 1-1/4 inches. For Vertical / Horizontal Air Handling Units, use PVC with a 3/4 male pipe thread fitting for the condensate pan. For High Static, Low Static, and Built In Ducted Units, the drain piping material is polyvinyl chloride pipe (1 inch). Figure 84: Drain Piping Slope. Pipe clamp Indoor unit Maintenance drain port Upward routing not allowed Drain Leak Test A leak test should be performed 24 hours after the drainage system has been installed. Figure 85: 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. 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 86: Example of a Common Indoor Unit Drainage System. 45 to 60 Angle 45 to 60 Angle 45 to 60 Angle 1/50 to 1/100 Slope 45 to 60 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. Application Guidelines GUIDELINES 139

140 APPLICATION GUIDELINES MULTI V Ducted 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 ±10 percent of the rated current marked on the name plate. Confirm wiring / cable thickness specifications: Power wiring is field supplied. Wire size is selected based on the larger MCA value, and must comply with the applicable local and national codes. Communication cable must be a minimum of 18 AWG, two-conductor, stranded, shielded, and must comply with the applicable local and national codes. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU communication cable at any other point. It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist. Include a disconnect in the power wiring system. Add an air gap contact separation of at least 1/8 inch in each active (phase) conductor. Any openings where the field wiring enters the cabinet must be completely sealed.. -. 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. Figure 87: Location of Power Wiring / Communications Cable Terminals in the High Static and Low Static Ducted Indoor Units. BH, BG, BR, B8 Frame Terminals 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. L(L1) N(L2) Power Supply High Voltage (208/230V) A B Communications Conduit Lock nut Conduit mounting plate 3. Secure the power wiring / communications cable. 140 GUIDELINES

141 APPLICATION GUIDELINES Figure 88: Location of Power Wiring / Communications Cable Terminals in the Built In Ducted Indoor Unit. B3, B4 Frame Terminals Lock nut L(L1) N(L2) YL RD BK 3(A) 4(B) Conduit Power Supply High Voltage (208/230V) Communications Figure 89: Location of Power Wiring / Communications Cable Terminals in the Vertical / Horizontal Air Handler Unit. Indoor Unit Terminal Block Power Wiring Through Optional Access Hole Communication Cable Through Optional Access Hole Figure 90: Terminal Block in the High Static (BH, BG, BR, B8 Frame) Ducted Indoor Unit (Apperances may vary depending on model). INTERNET GND 12V L(L1) N(L2) YL RD BK A B B A - - B A SODU IDU Outdoor Unit Terminal Block DRY1 DRY2 Application Guidelines Power Input V / 60 Hz / 1 Phase Ground Wired Controller Figure 91: Terminal Block in the Low Static (L1, L2, L2 Frame) Ducted Indoor Unit. Outdoor Unit Terminal Block Indoor Unit Terminal Block SODU IDU INTERNET DRY1 DRY2 GND 12V L(L1) N(L2) 3(A) 4(B) B A - - B A Ground Power Input V / 60 Hz / 1 Phase GUIDELINES 141