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LG MULTI V ARNU363DDB4 Installation Manual
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LG MULTI V ARNU363DDB4 Installation Manual

Split rooftop unit
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SPLIT ROOFTOP UNIT
INSTALLATION MANUAL
Models
ARNU363DDA4
ARNU363DDB4
ARNU483DDA4
ARNU483DDB4
ARNU603DDA4
ARNU603DDB4
ARNU723DDA4
ARNU723DDB4
36,000 to 72,000 Btu/h

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Summary of Contents for LG MULTI V ARNU363DDB4

  • Page 1 SPLIT ROOFTOP UNIT INSTALLATION MANUAL Models ARNU363DDA4 ARNU363DDB4 ARNU483DDA4 ARNU483DDB4 ARNU603DDA4 ARNU603DDB4 ARNU723DDA4 ARNU723DDB4 36,000 to 72,000 Btu/h...
  • Page 2 4. For more technical materials such as submittals, catalogs, engineering, owner’s, best practices, and service manuals, visit www.lghvac.com. For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice. © LG Electronics U.S.A., Inc.

  • Page 3: Table Of Contents

    Electrical Information ......................................44-62 Installation Checklist ......................................63-64 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 4: Safety Precautions

    There is a risk of explosion, physical injury, or death. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 5 There is risk of property damage. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 6 Failure to carefully read and follow all instructions in this manual can result in equipment malfunction and property damage. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 7 If the base collapses, the unit could fall and cause property damage or product failure. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 8: Unit Nomenclature

    B = Heat Pump Type Generation 4 = Fourth Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 9: Introduction

    INTRODUCTION This manual describes how to install LG Split Rooftop Unit (RTU) for Multi V Variable Refrigerant Flow (VRF) heat pump and heat recovery systems. Refer to LG’s Split Rooftop Unit Engineering Manual for complete detailed engineering data and selection procedures.
  • Page 10 • Additional drain hose • Connecting cable (power and control) Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 11: Split Rooftop Unit Product Overview

    Low ambient performance with LGRED° heat technology is included in Multi V 5 Air communication cable at any other point. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 12 Low ambient performance with LGRED° heat technology is included in Multi V 5 Air Source Units produced after February 2019. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 13: Electrical Data

    Max. power input is rated at maximum setting value. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 14: Interior Components

    (Side) (Optional) Return Inlet Return Inlet (Side) (Bottom) Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 15 Heat Pump Model Figure 3: RTU Components Heat Pump Model. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 16: Control Box Components

    T/B-DO (Digital Output) T/B-Motor Economizer(Honey Well) T/B-Communication/ Remote T/B-Main Power Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 17: Dimensions

    PRODUCT OVERVIEW External Dimensions Figure 5: Split RTU Dimensions. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 18: Refrigerant Flow Diagram

    Refrigerant Flow Diagram Figure 6: ARNU363~723DDA4 Refrigerant Flow Diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 19 HR liquid Pipe in thermistor Pipe out thermistor Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 20 Return air thermistor Pipe in thermistor Pipe out thermistor Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 21: Split Rooftop Unit Installation Guidelines

    Engineering or Installation Manual, and follow the LATS diagram. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 22 Do not install the unit near high-frequency generator sources. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 23 Figure 11: Split Rooftop Unit Forklift Guide Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 24 Do not destroy the continuity of the surfaces. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 25 2. Rotate the fan wheel(s) by hand and assure no parts are rubbing. Assemblies Blower - one plenum-type fans (LG 3D Plug). All units are equipped with a plenum fan for Supply Air Coils - Evaporator coil Filters - 2 inch thick pleated paper MERV 8(standard) or MERV 13 filters in the supply air stream Split DX system - Unit ordered with either Multi V 5 outdoor unit or Multi V S outdoor unit.
  • Page 26 (lbs.) Model ARNU363DDB4 ARNU483DDB4 ARNU603DDB4 ARNU723DDB4 Weight (lbs.) Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 27 Figure 14: Split Rooftop Unit Roof Curb Drawing Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 28 • Install the Split Rooftop Unit to protect against extremely high winds and earthquakes. Any deficiency in installation will cause unit to fall, resulting in physical injury or death. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 29 • Install the Split Rooftop Unit to protect against extremely high winds and earthquakes. Any deficiency in installation will cause unit to fall, resulting in physical injury or death. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 30: Refrigerant Safety

    Information about ASHRAE Standard 15-2010 / 34-2010 and addenda current as of the date of this publication. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 31: General Refrigerant Piping System

    24 hours Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 32 • Protect isolation valves, electronic expansion valves, and other heat-sensitive control components from excessive heat with a wet rag or heat barrier spray. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 33: Refrigerant Piping

    Wrap all refrigerant piping including field-provided isolation ball valves and flexible pipe connection kits provided by LG. Glue all insulation joints with no air gaps between insulation segments, and between insulation segments and the unit case. Ensure insulation material fits snugly against the refrigeration pipe with no air space between the pipe surface and the surrounding insulation.
  • Page 34 (10) piping diameters can minimize pressure drop. Be sure no traps or sags are present. LG prefers the use of hard drawn copper in pipe segments when connecting a Split Rooftop Unit product and an outdoor unit. • Always reference the LATS HVAC software report.
  • Page 35 22-28 (264-336) 3/8 in 30-42 (360-504) 1-3/8 in Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 36 3/4 in ≤ 592,000 1-5/8 in 1-3/8 in Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 37: Duct Connections

    Supply Duct Horizontal Duct Economizer option Opening Opening Openings Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 38 HR unit pipe hole Control box access panel Vertical duct access Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 39: Roof Ductwork Configuration

    Figure 23: Split Rooftop Unit Access Holes [Unit: Inch] Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 40: Piping Connections

    23-7/32 ARUN363DDB4 Brazed 5-1/32 17-1/8 Brazed 5-1/32 23-7/32 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 41 Figure 26: Split Rooftop Unit Refrigerant Piping Connections (Heat Pump Model). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 42: Condensate Piping Information

    B ≥ 1-7/12 inches C ≥ 13/16 inches Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 43 ARUN603DDA4 Plain 24-1/4 4-19/32 ARUN723DDA4 Plain 24-1/4 4-19/32 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 44: Electrical Information

    Failure to properly provide a NEC-approved earth ground can result in property damage and equipment malfunction. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 45 Do not run the power wiring and the communication cable in the same conduit. It will result in equipment malfunction. • Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 46 Do not include splices or wire nuts in the communication cable. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 47 Failure to properly provide a National Electrical Code-approved earth ground can result in property damage and equipment malfunction. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 48 Units / Heat Recovery Units • Communication cable from Main Outdoor Unit to RTU / Indoor Units / Heat Recovery Units is to be LG supplied or field supplied 18 AWG, 2-conductor, twisted, stranded, shielded. Ensure the communication cable shield is properly grounded to the Main Outdoor Unit chassis only.
  • Page 49 Power Input 208-230V / 60 Hz / 1 Phase Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 50 T/B-DO (Digital Output) T/B-Motor T/B-Communication/ Remote Economizer(Honey Well) T/B-Main Power Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 51 • Failure to follow any of these power and communications wiring guidelines or instructions will cause communications errors and unit mal- function. Never use wire caps and never splice communications cables. Never connect zone controllers or other central controllers or LG building management system gateways to the RTU / outdoor unit com- munications cable. Connection Procedure RTU installation best practices are to connect control wiring (low voltage) and then connect power wiring (high voltage).
  • Page 52 Figure 37: Main Outdoor Unit to RTU Communication Wiring—Typical Daisy Chain Configuration Example. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 53 Wiring must comply with all applicable local and national codes. • If using LG supplied cable and the length needs to be extended, the LG Extension Kit (sold separately) must be used. A maximum of four (4) kits (up to 165 feet) can be used.
  • Page 54 Signal 12VDC Comm. 12VDC Comm. Signal 12VDC Comm. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 55 (see table). LG VRF systems can operate with both old 2A heat recovery units and new 3A heat recovery units if the outdoor unit software has been upgraded. If a system includes a mix of both old and new heat recovery units, system design must follow 2A heat recovery unit series piping rules.
  • Page 56 (4) to five (5) feet above the finished floor. • It may be necessary to use a handy box that is sized in metric units, depending on the sensor model. Check with your LG representative to verify which size of handy box is needed for the sensor in question.
  • Page 57 Figure 43: ARNU363~723DDA4 Wiring Diagram (Dry Contact PDRYCB400). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 58 Figure 44: ARNU363~723DDB4 Wiring Diagram (Dry Contact PDRYCB400). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 59 Figure 45: ARNU363~723DDA4 Wiring Diagram (Dry Contact PDRYCB320). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 60 Figure 46: ARNU363~723DDB4 Wiring Diagram (Dry Contact PDRYCB320). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 61 **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. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 62 There is risk of fire, electric shock, explosion, physical injury or death. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 63: Installation Checklist

    Double layer insulation is provided at pipe supports and wall penetrations. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 64 Power and communications cables are properly restrained and separated. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 65 To access additional technical documentation such as submittals, indoor unit engineering manuals, installation, service, product data performance, general best practice, and building ventilation manuals, as well as white papers, catalogs, LATS software programs, and more, log in to www.lghvac.com.
  • Page 66 IM_MultiV_Split_Rooftop_Unit_02_23 LG Electronics, U.S.A., Inc. Supersedes: IM_MultiV_Split_Rooftop_Unit_11_21 Air Conditioning Technologies IM_MultiV_Split_Rooftop_Unit_07_21 4300 North Point Parkway IM_MultiV_Split_Rooftop_Unit_06_21 Alpharetta, Georgia 30022 www.lghvac.com...

This manual is also suitable for:

Multi v arnu363dda4Multi v arnu483dda4Multi v arnu483ddb4Multi v arnu603dda4Multi v arnu603ddb4Multi v arnu723dda4 ... Show all

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