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LG MULTI V WATER MINI Engineering Manual
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LG MULTI V WATER MINI Engineering Manual

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ENGINEERING MANUAL
Variable Refrigerant Flow
Water-Source Units
4.4 Tons

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Summary of Contents for LG MULTI V WATER MINI

  • Page 1 ENGINEERING MANUAL Variable Refrigerant Flow Water-Source Units 4.4 Tons...
  • Page 2 LATS software programs, and more, log in to 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

    TABLE OF CONTENTS Unit Nomenclature ����������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������4 LG Air Conditioner Technical Solution (LATS) ���������������������������������������������������������������������������������������������������������������������������������������������������������5-6 Rrefrigerant Charge Worksheet ������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������7 Water Source Product Data ��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������8-20 Mechanical Specifications ......................................9 Product Features and Benefits ....................................10 General Data ..........................................11 Electrical Data ..........................................11 Dimensions ..........................................12 Wiring Diagram ...........................................13...

  • Page 4: Unit Nomenclature

    Basic Function = A Generation 2 = Second 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. 4 | INTRODUCTION...

  • Page 5: Lg Air Conditioner Technical Solution (Lats)

    LG offers, free of charge, LG Air Conditioner Technical Solution (LATS) software—a total design solution for LG air conditioning systems. To reduce the risk of designing an improper applied system or one that will not operate correctly, LG requires that LATS software be used on all projects. Formats LATS is available to LG customers in three user interfaces: LATS HVAC, LATS CAD2, and LATS REVIT.
  • Page 6 LATS can generate an Excel GERP report that can imported into the LG SOPS pricing and ordering system.

  • Page 7: Rrefrigerant Charge Worksheet

    For refrigerant charge purposes, consider only the liquid line; ignore the vapor line(s). Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp. INTRODUCTION | 7...

  • Page 8: Water Source Product Data

    WATER SOURCE PRODUCT DATA Mechanical Specifications on page 9 Product Features and Benefits on page 10 General Data on page 11 Electrical Data on page 11 Dimensions on page 12 Wiring Diagram on page 13 Refrigerant Flow Diagrams on page 14 Acoustic Data on page 17 Accessories on page 18...

  • Page 9: Mechanical Specifications

    For indoor unit guide specifications, visit www.lghvac.com. Due to our policy of continuous product innovation, some specifications may change without notification. PRODUCT DATA | 9 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 10: Product Features And Benefits

    Occupants remain comfortable while utility costs are reduced. 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. 10 | PRODUCT DATA...

  • Page 11: General Data

    Maximum allowable voltage imbalance is 2%. Due to our policy of continuous product innovation, some specifications may change without notification. PRODUCT DATA | 11 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 12: Dimensions

    Side View Front View 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. 12 | PRODUCT DATA...

  • Page 13: Wiring Diagram

    Figure 5: ARWN053GA2 Wiring Diagram. Due to our policy of continuous product innovation, some specifications may change without notification. PRODUCT DATA | 13 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 14: Refrigerant Flow Diagrams

    Valve Valve Plug Switch 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. 14 | PRODUCT DATA...
  • Page 15 Valve Valve Plug Switch Due to our policy of continuous product innovation, some specifications may change without notification. PRODUCT DATA | 15 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 16 Valve Valve Plug Switch 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. 16 | PRODUCT DATA...

  • Page 17: Acoustic Data

    Octave Band Center Frequency (Hz) Due to our policy of continuous product innovation, some specifications may change without notification. PRODUCT DATA | 17 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 18: Accessories

    2-3/4 (70) 4-5/16 (110) 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. 18 | PRODUCT DATA...
  • Page 19 I.D. 1-1/8 I.D. 7/8 Due to our policy of continuous product innovation, some specifications may change without notification. PRODUCT DATA | 19 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 20: Accessories

    LG representative to assist with diagnostic evaluations. LGMV is available in different formats, including Mobile LGMV, which is an app for use on wireless devices. Contact your LG Sales Representative for information about the different formats, and recommended system requirements for any version of LGMV.

  • Page 21: Performance Data

    PERFORMANCE DATA Cooling Capacity Data on page 22 Heating Capacity Data on page 28 Correction Factors on page 34...

  • Page 22: Cooling Capacity

    TC = Total Cooling Capacity (MBh). 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. 22 | PERFORMANCE DATA...
  • Page 23 TC = Total Cooling Capacity (MBh). Due to our policy of continuous product innovation, some specifications may change without notification. PERFORMANCE DATA | 23 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 24 TC = Total Cooling Capacity (MBh). 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. 24 | PERFORMANCE DATA...
  • Page 25 TC = Total Cooling Capacity (MBh). Due to our policy of continuous product innovation, some specifications may change without notification. PERFORMANCE DATA | 25 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 26 TC = Total Cooling Capacity (MBh). 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. 26 | PERFORMANCE DATA...
  • Page 27 TC = Total Cooling Capacity (MBh). Due to our policy of continuous product innovation, some specifications may change without notification. PERFORMANCE DATA | 27 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 28: Heating Capacity

    TC = Total Heating Capacity (MBh). 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. 28 | PERFORMANCE DATA...
  • Page 29 TC = Total Heating Capacity (MBh). Due to our policy of continuous product innovation, some specifications may change without notification. PERFORMANCE DATA | 29 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 30 TC = Total Heating Capacity (MBh). 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. 30 | PERFORMANCE DATA...
  • Page 31 TC = Total Heating Capacity (MBh). Due to our policy of continuous product innovation, some specifications may change without notification. PERFORMANCE DATA | 31 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 32 TC = Total Heating Capacity (MBh). 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. 32 | PERFORMANCE DATA...
  • Page 33 TC = Total Heating Capacity (MBh). Due to our policy of continuous product innovation, some specifications may change without notification. PERFORMANCE DATA | 33 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 34: Correction Factors

    CORRECTION FACTORS Operating Temperature Ranges on page 35 Water Source Unit / Indoor Unit Matching Limitations on page Additional Charge for Pipe Length on page 35 Elevation Correction Factors on page 36...
  • Page 35 : Actual Total Length of Liquid Piping Ø3/8 (ft.) Due to our policy of continuous product innovation, some specifications may change without notification. PERFORMANCE DATA | 35 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 36 Heating Correction Factor for ARWN053GA2 models is 1.0 for all equivalent lengths and elevation differences. 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. 36 | PERFORMANCE DATA...

  • Page 37: Electrical Connections

    ELECTRICAL CONNECTIONS Power Wiring and Communication Cable on page 38 DIP Switch Settings For Use With Gen 4 Indoor Units on page 40...
  • Page 38 • Power wiring and communication cables must be routed in a manner that keeps them a minimum of two (2) inches apart. 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. 38 | ELECTRICAL CONNECTIONS...
  • Page 39 TN Cassette Frames Due to our policy of continuous product innovation, some specifications may change without notification. ELECTRICAL CONNECTIONS | 39 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 40: Dip Switch Settings For Use With Gen4 Indoor Units

    WITH GEN4 INDOOR UNITS Generation 4 Equipment LG’s indoor units are designated Generation 4 (Gen 4). For Gen 4 indoor units to operate with Gen 4 indoor unit features, the air conditioning system must meet the following requirements: • All indoor units, heat recovery units, and air / water source units Figure 14: Location and Setting of Outdoor Unit DIP Switch 3.
  • Page 41 WATER LOOP CIRCUIT DESIGN Water Design Guide on page 42 Piping System Specifications on page 44 Flow Switches and Solenoid Valve Wiring on page 48 Variable Water Flow Control Kit on page 50...

  • Page 42: Water Circuit Installation

    Design Steps The Multi V Water Mini unit requires a water cooling / heating source. This year-round heating and cooling system uses a two (2) pipe closed loop water circuit that circulates water continuously and maintains water temperature between 23°F and 113°F for cooling mode, 23°F and 113°F for heating mode.

  • Page 43: Water Circuit Design

    Geothermal Water Circuit Design In lieu of a cooling tower / boiler, Multi V Water Mini units may use a geothermal system that is properly sized to match the water cooled unit capacity. This year round heating and cooling system will utilize a two (2) pipe closed loop water circuit that circulates water continuously, maintaining water temperatures between 23°F and 113°F for heating, 23°F and 113°F for cooling (Variable water flow control kit [PRVC1]...

  • Page 44: Piping System Specifications

    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. 44 | WATER CIRCUIT...
  • Page 45 Antifreeze % by wt Due to our policy of continuous product innovation, some specifications may change without notification. WATER CIRCUIT | 45 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 46 • Air must be purged from the system. 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. 46 | WATER CIRCUIT...
  • Page 47 Due to our policy of continuous product innovation, some specifications may change without notification. WATER CIRCUIT | 47 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 48: Flow Switches And Solenoid Valves

    Figure 24: Set the DIP switches as below and turn on the power (For water solenoid valve controlled by water source unit). 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. 48 | WATER CIRCUIT...
  • Page 49 Picture 3 Picture 4 Due to our policy of continuous product innovation, some specifications may change without notification. WATER CIRCUIT | 49 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

  • Page 50: Variable Water Flow Control Kit (Required Accessory)

    Variable Water Flow Control Kit (Required Accessory) Variable Water Flow Control Kit (Model No. PRVC1) allows connection of Multi V Water Mini units to a variable pumping condenser water systems. The control board, transformer, and wiring provide connections to a field-supplied modulating water valve.
  • Page 51 Do not damage the case of the Variable Water Flow Control Kit as it may cause the PCB to malfunction. Due to our policy of continuous product innovation, some specifications may change without notification. WATER CIRCUIT | 51 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 52 Water Mini Unit Main PCB 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. 52 | WATER CIRCUIT...
  • Page 53 • The use of an external power source is recommended. Due to our policy of continuous product innovation, some specifications may change without notification. WATER CIRCUIT | 53 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 54 • AWG 23 wiring is recommended for the power (DC 12V) line. 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. 54 | WATER CIRCUIT...
  • Page 55 • AWG 23 wiring is recommended for the power (AC 12V) line and signal (DC 0~10V) line. Due to our policy of continuous product innovation, some specifications may change without notification. WATER CIRCUIT | 55 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 56 40% of the nominal flow rate instead of 50%. If the flow rate is lower, it will damage the water source unit. 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. 56 | WATER CIRCUIT...
  • Page 57 40% of the nominal flow rate instead of 50%. If the flow rate is lower, it will damage the water source unit. Due to our policy of continuous product innovation, some specifications may change without notification. WATER CIRCUIT | 57 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 58 PIPING LIMITATIONS AND PLACEMENT CONSIDERATIONS Refrigerant Piping Design on page 59 Placement Considerations on page 63...

  • Page 59: Refrigerant Piping Design

    • The maximum number of indoor units on a Multi V Water Mini ARWN053GA2 heat pump system is nine (9). One of the most critical elements of a Multi V Water Mini system is the refrigerant piping. The table below lists pipe length limits that must be followed in the design of a Multi V Water Mini refrigerant pipe system: Table 27: Multi V Water Mini Liquid Refrigerant Pipe Design Limitations.

  • Page 60: Pipe Sizing

    See pages 61-62 for refrigerant pipe diameter and pipe length tables. 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. 60 | LIMITS / PL ACEMENT...
  • Page 61 • Y-branches and other header branches cannot be installed downstream of the initial header branch. Due to our policy of continuous product innovation, some specifications may change without notification. LIMITS / PL ACEMENT | 61 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 62 Ø3/8 Ø5/8 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp. 62 | LIMITS / PL ACEMENT...

  • Page 63: Placement Considerations

    Due to our policy of continuous product innovation, some specifications may change without notification. LIMITS / PL ACEMENT | 63 ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 64 1-1/4 1-1/4 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. 64 | LIMITS / PL ACEMENT...
  • Page 65 To access additional technical documentation such as submittals, indoor unit engineering manuals, installation, service, general best practice, and building ventilation manuals, as well as white papers, catalogs, LATS software programs, and more, see www.lghvac.com.
  • Page 66 20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. Air Conditioning Technologies EM_MultiVWaterMini_ARWN053GA2_8_20 4300 North Point Parkway Supersedes EM_MultiVWaterMini_5_16 Alpharetta, Georgia 30022 VRF-EM-BM-001-US 014D23 www.lghvac.com VRF-EM-BM-001-US 013L26...

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