LG Multi V Water IV Installation Manual
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LG Multi V Water IV Installation Manual

Variable refrigerant flow water source units 6.0 to 48.0 tons
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INSTALLATION MANUAL
Variable Refrigerant Flow
Water Source Units
6.0 to 48.0 Tons

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Summary of Contents for LG Multi V Water IV

  • Page 1 INSTALLATION MANUAL Variable Refrigerant Flow Water Source Units 6.0 to 48.0 Tons...
  • Page 2 For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice. ©LG Electronics U.S.A., Inc. This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.

  • Page 3: Table Of Contents

    Insulating the Refrigerant Piping ............70 Pressure (Leak) Testing ..............73 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

    Sharp edges may cause personal injury. authorized LG service provider. 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 Periodically check that the water source unit is not damaged. There is a risk of equipment 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 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 7 Note Generation 4 Equipment The latest versions of LG’s indoor units and water source units are designated Generation 4 (Gen 4). For Gen 4 units to operate with Gen 4 features, the air conditioning system must meet the following requirements: •...

  • Page 8: Unit Nomenclature

    4 = Fourth* *The latest versions of LG’s indoor units and water source units are designated Generation 4 (Gen 4). For Gen 4 units to operate with Gen 4 features, the air conditioning system must meet the requirements listed on page 7.

  • Page 9: General Data

    When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 10 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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: Arwb Series Heat Recovery Water Source Unit Specifications

    When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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 When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. 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: Heat Recovery Unit Specifications And Electrical Data

    PRHR042A 208-230 / 60 / 1 0.040 0.040 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: Electrical Data

    FLA) rounded down to the nearest standard fuse size. Maximum allowable voltage unbalance is 2%. 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: Arwb Series Heat Recovery Water Source Units

    FLA) rounded down to the nearest standard fuse size. Maximum allowable voltage unbalance is 2%. 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: Water Source Unit Dimensions

    WATER SOURCE UNIT DIMENSIONS Single Frame Heat Pump and Heat Recovery 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: Dual Frame Heat Pump And Heat Recovery

    WATER SOURCE UNIT DIMENSIONS Dual Frame Heat Pump and Heat Recovery 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 26: Triple Frame Heat Pump And Heat Recovery

    WATER SOURCE UNIT DIMENSIONS Triple Frame Heat Pump and Heat Recovery 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: Heat Recovery Units

    DIMENSIONS Heat Recovery Unit PRHR022A 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 HEAT RECOVERY UNIT DIMENSIONS PRHR032A 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 HEAT RECOVERY UNIT DIMENSIONS PRHR042A 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 Flow Diagrams

    Remarks Solenoid Valve Strainer Check Valve Pressure 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.

  • Page 31: Heating Operation

    Remarks Solenoid Valve Strainer Check Valve Pressure 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.

  • Page 32: Arwb Heat Recovery Systems

    Switch Sensor Valve Remarks Temperature Strainer Sensor Valve 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: Heating Operation

    Switch Sensor Valve Remarks Temperature Strainer Sensor Valve 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 34: Simultaneous Operation Mode 1 (Cooling Based Operation)

    Switch Sensor Valve Remarks Temperature Strainer Sensor Valve 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 35: Simultaneous Operation Mode 2 (Heating Based Operation)

    Switch Sensor Valve Remarks Temperature Strainer Sensor Valve 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: Prhr022A, Prhr032A, Prhr042A Heat Recovery Units

    D: Controls pressure between the high and low pressure vapor pipes during simultaneous operation. 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: Cut Sheets

    Water Source Unit Y-branch Kits for Heat Pump Systems • LG water source unit Y-branch fittings must be used with LG systems and be properly installed following the instructions in the applicable LG manual. Field-supplied branch fittings are not permitted.

  • Page 38: Indoor Unit Y-Branch Kits For Heat Pump Systems

    4-3/8 4-3/8 I.D. 3/4 O.D. 5/8 4-3/4 2-3/4 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.

  • Page 39: Water Source Unit Y-Branch Kits For Heat Recovery Systems

    0.0208 Btu/h/ft. ºF Design Pressure 550 psig Thickness 1/2 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: Indoor Unit Y-Branch Kits For Heat Recovery Systems

    O.D. 5/8 2-3/4 4-3/4 4-3/8 4-3/4 AJR54072908 AJR54072904 AJR72963604 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: Header Kits

    Table 36: Fitting Properties. Material Copper Design Pressure 550 psig 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 I.D. 1-1/4 I.D. 1-1/8 I.D. 5/8 I.D. 1-3/8 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.

  • Page 43: Installation

    • The water source unit should be strategically located in the building to minimize refrigerant piping materials, labor, and refrigerant. The refrigerant pipe system must be designed within the piping limitations described in the Multi V Water IV Engineering Manual.

  • Page 44: Transporting/Lifting 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.

  • Page 45: Water Source Unit Minimum Space Requirements

    9-3/4 <Top view> Figure 12: Dual Frame Installation. 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 H-Beam Support Front View Figure 14: Stacked Frame Installation. 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: General Mounting / Anchoring 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.

  • Page 48: Heat Recovery Box Minimum Space Requirements

    If reducers are used, space for service access must be increased to match the dimensions of the reducer. 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 49: Refrigerant Piping Installation

    The piping system design can be entered manually into LATS from a one-line pipe diagram. To ensure that the refrig- erant piping design meets LG’s quality standards, a LATS refrigerant piping design must be provided with every Multi V Water Source Unit order.
  • Page 50 Y-branches: one for liquid, one for low-pressure vapor, one for high-pressure vapor. 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 Field-Supplied Copper Tubing Type ACR copper is the only approved refrigerant pipe material for use with LG Multi V commercial air conditioning products. ACR rated tub- ing is the only type that ships with yellow caps. Approved tubing for use with Multi V products will be marked “R410 RATED” along the length of the tube.
  • Page 52 Only LG supplied Y-branch fittings can be used to join one pipe segment to two or more segments. Third-party or field-fabricated Tee’s, Y-fittings, Headers, or other branch fittings are not qualified for use with LG Multi V IV systems. The only field-provided fittings allowed in a Multi V IV piping system are 45°...
  • Page 53 (Figure 26). Field supplied copper pipe 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 54 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 Pipe length baseline temperature = 0°F. "Expansion of Carbon, Copper and Stainless Steel Pipe," The Engineers' Toolbox, www.engineeringtoolbox.com. 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 56 R = Center line Length of Pipe. L = Center line Minimum Radius (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 57 Field-Provided Isolation Ball Valves LG maintains a neutral position on using isolation valves in VRF refrigerant piping systems. LG does not endorse any manufacturer of isola- tion valves. It is recognized that installing isolation valves may simplify future maintenance requirements, and, if used, considerations should be taken including, but not limited to, the following: •...
  • Page 58 Wall Sleeve 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: Pipe Sizing For Arwn Series Heat Pump Systems

    • Be sure to insulate all refrigerant system piping and piping connections. 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 High Static Ducted indoor units have 3/8Ø (liquid) and 5/8Ø (vapor). 1-5/8 1-5/8 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.
  • Page 61 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: Pipe Sizing For Arwb Series Heat Recovery Systems

    • Be sure to insulate all refrigerant system piping and piping connections. 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 1-5/8 1-3/8 1-5/8 1-3/8 1-5/8 1-3/8 1-5/8 1-3/8 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.
  • Page 64 • [Length of pipe from water source unit to farthest indoor unit (A+B+C)] - [Length of pipe from water source unit to closest indoor unit (A+B+C)] ≤131 feet. 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: Pipe Layout

    A second branch cannot be installed after a header. 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 66 Figure 42: Close Up of An Inverted Oil Trap. Oil Trap ≥8 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 67 -10° Toward indoor 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.

  • Page 68: Refrigerant Pipe Connections

    • Use steel wool or comparable material to fill gaps between the unit case and the refrigerant and electrical connections to prevent rodent and animal entry. 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 69 5/8 ~ 11/16 ≤76,400 3/4 ~ 13/16 5/8 ~ 11/16 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 70 Indoor Unit Casing Pipe Insulation Insulation Communication Cables 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 71: Insulating The Refrigerant Piping

    3/8 inch thick ethylene propylene diene methylene (EPDM) insulation that is plenum-rated with a heat-resistance factor of more than 158°F. 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 72 Applying Insulation to Y-Branch and Header Fittings Check the fit of the insulation jacket provided with the LG Y-branch and Header kits after all pipes are brazed to fittings. Mark all pipes at the point where the insulation jacket ends. Remove the jacket. Install field-supplied insulation on the pipe segments first, and then install the LG provided insulation plugs on the ends of all unused Header ports.

  • Page 73: Pressure (Leak) Testing

    Perform a Pressure (Leak) Test Do not apply power during this test. If power has been applied to any device before the pressure test, contact your LG Applied Rep champion or service technician for the procedure to reopen the EEV valves.
  • Page 74 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 75: Water Circuit Installation

    (2) pipe closed loop, continuously-circulating water circuit. This water circuit helps maintain water temperature at 23°F to 113°F for cooling mode and 23°F to 113°F for heating mode. Refer to the capacity tables in the Multi V Water IV Water Source Unit Engineering Manual for performance at different entering water temperatures.
  • Page 76 Antifreeze can be used for all geothermal applications. Refer to “Freeze Protection” on page 78 for recommended levels of antifreeze and correction factors. 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 77: Field-Supplied Components For Wsu Installation

    Piping System The following field supplied components must be installed at each Multi V Water IV Water Source Unit. Refer to Figure 61. • Flow switch at outlet in the horizontal pipe. Wire the flow switch to communication terminals and set to shut off the WSU if flow falls be- low 50% of WSU design flow.

  • Page 78: Piping System Specifications

    Antifreeze % by wt Antifreeze % by wt 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 79 If water temperature is maintained at 68°F in winter and 86°F in summer, insulation is not required (unless required by local code). 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 80 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 81 5(A) 5(B) Picture 3 Picture 3 Picture 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.
  • Page 82 Figure 67: WSU DIP Switch Settings for Solenoid Valve Control by WSU 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 83 Piping System Specifications Variable Water Flow Valve Control Kit PWFCKN000 (Optional) When entering water temperature is lower than 59ºF, variable water flow control kit PWFCKN000 is required. LG recommends installing a variable water flow control kit on each water source unit.

  • Page 84: Electrical System Installation

    • Do not run the power wiring and the communication cable in the same conduit. 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 85: Power Wiring

    • Do not overtighten the connections; overtightening may damage the terminals. 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 86: Communication Cable

    “Separating Power Wires and Communication Cables” on page 84, 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 87: Arwn Series Heat Pump Systems (208-230V And 460V)

    IDU A CEN B CEN A Slave 2 WSU 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 88: Arwb Series Heat Recovery Systems (208-230V And 460V)

    IDU A CEN B CEN A Slave 2 WSU 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 89: Idu Communication Cable

    IDU B and IDU A Terminals in WSU HR 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.

  • Page 90: Zone Control Of Indoor Units

    WSU to IDU Communication Cable Wall Controller to IDU 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 91: Communication Cable

    Controller Connection. • NEVER splice, cut, or extend cable length with field provided cable. If the length must be extended, use the LG Extension Kit (sold separately). A maximum of four (4) kits (up to 165 feet) can be connected together.

  • Page 92: Option Settings For All Water Source Units

    ON / op1–op3 Compressor Crankcase Heater ON / OFF 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 93 DIP Switch Settings for Generation 4 Equipment Generation 4 Equipment The latest versions of LG’s indoor units and water source units are designated Generation 4 (Gen 4). For Gen 4 units to operate with Gen 4 features, the air conditioning system must meet the following requirements: •...

  • Page 94: Pre-Commissioning

    IDU(A) and IDU(B). Do NOT open the service valves or attempt to start water source unit compressors until directed by the LG-authorized Commissioning Agent. Major damage to the unit piping and compressors will occur, and there is a risk of explosion, suffocation, physical injury, and / or death.
  • Page 95 See Description Number of heat recovery units found displays (HR systems only) Blank Auto addressing procedure is complete 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 96 (8) indoor units have been successfully auto addressed. 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 97 IDU(A) and IDU(B) of the water source unit. 10. Replace the control panel cover. 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 98: Group Control / Central Control

    Control (See Central Controller Communications Limitations on the next page). 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 99 Can be assigned as desired or for example, can follow the room layout on each floor. For each LG Central Controller product provided on the project, devise a central control address schedule and assign a central control ad- dress to each indoor unit(s) Hydro Kit(s), and ERV(s) units. Record this central control address for each component in the column provided on the Pre-commissioning Device Configuration Worksheet.
  • Page 100 18. After all Slave indoor units have addresses assigned, go back to the Master indoor unit and restore 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 101: Indoor Unit Temperature Sensing Strategy/Air Balance

    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 102 "0". 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 103 • Any unused port must be sealed with a brazed copper cap, not with a plastic cap. 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 104 Large capacity indoor unit No. 3, 4 Valve 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 105 Increases the valve address by one (1) SW04M 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 106 Increases the valve address by one (1) SW05M SW05M Manual addressing zoned indoor units 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 107: Prepare The Refrigerant Piping System

    • Do not open the water source unit service valves and release the factory refrigerant charge until the commissioning agent authorizes to do so. 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 108 Vapor Pipe Figure 85: Heat Pump System Vacuum Configuration 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 109 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 110 Initiate a Request for System Commissioning Contact your LG Applied Representative’s Project Manager or your account representative and request a Water Source System Commission- ing. Provide all the documents listed in the “Pre-commissioning Package Documents” section above. After Commissioning Has Been Requested The commissioning agent may contact you to discuss specific job points, scheduled day(s) and expected duration.

  • Page 111: Maintenance

    Before using a chemical solution to clean the heat exchanger, note its potential to corrode stainless steel or copper. Consult the chemical solution manufacturer for more 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 112: General Maintenance Schedule

    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 113 • Always check if the water supply is flowing normally and in the correct direction before operating the 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.

  • Page 114: Lg Monitoring View (Lgmv) Diagnostic Software

    This software can be used to both commission new systems and troubleshoot existing sys- tems. LGMV data can be recorded to a .csv file and emailed to an LG representative to assist with diagnostic evaluations. For detailed LGMV software information, contact your LG representative.
  • Page 115 Multi V Water IV Service Manual. 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 116: Error Code Tables

    Hydro kit water pipe temperature sensor disconnection or short circuit 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 117 Slave 2 WSU inverter compressor over-current error operation 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 118 Slave 1 WSU over-voltage sensor disconnection or short circuit 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 119 Slave 2 WSU inverter PCB EEPROM ACCESS error 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 120 Slave 2 WSU Sub cool inlet temperature sensor disconnection or short 1 1 4 error circuit 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 121 1 8 2 external board MICOMs and sub MICOM 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 122 For detailed information on how to troubleshoot each error, see the Water Source Unit Service Manual on www.lghvac.com. 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 123 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 124: Installation Checklist

    Best practice—a minimum of 20″ of straight pipe was installed between each elbow, and Y-branch or header fitting, and between two Y-branch fittings. 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 125 No “Star” or multiple parallel circuits. No cable splices or wire caps were used to connect communications cables. LG-supplied cable was used between each indoor unit and its zone controller. No cables were spliced and no wire caps are present.

  • Page 126: Pre-Commissioning Checklist

    If required, an antifreeze chemical has been added to the water circuit. 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 127 Date: _______________________________________________ *This form must be completed and submitted to LG a minimum of three (3) weeks prior to final scheduling of any startup. Note: If any of the above items are not complete at time of start-up, back charges will be assessed for additional costs.
  • Page 128 PRE-COMMISSIONING CHECKLIST Page 3 Notes for the Commissioning Agent 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 129 PRE-COMMISSIONING CHECKLIST Page 4 Notes for the Commissioning Agent 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 130: Refrigerant 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.

  • Page 131: Wsu Factory Refrigerant Charge

    ARWN192DAS4 ARWN144DAS4 ARWN144DAS4 19.8 48.0 ARWN576DAS4 ARWN192DAS4 ARWN192DAS4 ARWN192DAS4 19.8 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.
  • Page 132 ARWB144DAS4 19.8 48.0 ARWB576DAS4 ARWB192DAS4 ARWB192DAS4 ARWB192DAS4 19.8 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.
  • Page 133 Freight Damage and Unit Replacements ..............Your LG Manufacturer Representative Missing Parts ....................... Your LG Manufacturer Representative Received Wrong Water Source Unit Model ..............Your LG Manufacturer Representative Installation, Startup, and Commissioning Technical Assistance ......1-888-865-3026...
  • Page 134 20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Customer Information Center, Commercial Products LG Electronics IM_MultiV_WaterIV_5_16 Commercial Air Conditioning Division 1-888-865-3026 USA Supercedes: IM_MultiV_WaterIV_11_15 4300 Northpoint Parkway, Suite 100 Follow the prompts for commercial A/C products. Supercedes: IM_MultiV_WaterIV_6_15 Alpharetta, Georgia 30022 Supercedes IM-MultiV-WaterIV-02-15 www.lghvac.com...

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