LG KSUJA181A Engineering Manual
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LG KSUJA181A Engineering Manual

LG KSUJA181A Engineering Manual

Single zone mid static ducted lgred r32 systems
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MID STATIC DUCTED LGRED° R32 SYSTEMS
KSUJA301A (30,000 Btu/h)
KSUJA361A (36,000 Btu/h)
ENGINEERING MANUAL
KSUJA181A (18,000 Btu/h)
KSUJA241A (24,000 Btu/h
SINGLE ZONE
KSSJA421A (42,000 Btu/h)
KSSJA481A (48,000 Btu/h)

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Summary of Contents for LG KSUJA181A

  • Page 1 SINGLE ZONE MID STATIC DUCTED LGRED° R32 SYSTEMS ENGINEERING MANUAL KSUJA181A (18,000 Btu/h) KSUJA241A (24,000 Btu/h KSUJA301A (30,000 Btu/h) KSSJA421A (42,000 Btu/h) KSUJA361A (36,000 Btu/h) KSSJA481A (48,000 Btu/h)

  • Page 2: Proprietary Data Notice

    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: Lg Air Conditioner Technical Solution (Lats)

    Microsoft® Corporation. ® LATS Revit integrates the LG LATS program with Revit® software**. It permits engineers to layout and validate LG VRF, Multi F / Multi F MAX, Single-Zone, and DOAS directly into Revit drawings.
  • Page 4 LATS can generate an Excel GERP report that can be imported into the LG SOPS pricing and ordering system.

  • Page 5: Table Of Contents

    Communication / Connection Cable ....................................99 Controllers ............................................ 100 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: Table Of Symbols

    R32 Refrigerant LG Electronic split system heating and air conditioning (HVAC) products now contain R32 refrigerant. While R32 refrigerant is slightly flammable, it has a higher efficiency, a lower Global Warming Potential (GWP) value, and is more environmentally friendly than R32.

  • Page 7: Product Data

    PRODUCT DATA Nomenclature on page X Pairing Table on Page XX Mechanical Specifications on page X General Data on page XX Electrical Data on page XX Functions, Controls, and Options on page XX Outdoor Unit Dimensions on page XX Outdoor Unit Center of Gravity / Corner Weight on page XX Indoor Unit Dimensions on page XX Air Flow, Temperature Distribution Graphs on page XX Acoustic Data on page XX...

  • Page 8: Unit Nomenclature

    1 to 9 9. Function A = 208~230V 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: Pairing Table

    KSSJA421A (42,000 Btu/h) KSSJA481A (48,000 Btu/h) 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: Mechanical 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.
  • Page 11 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: General Data

    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 (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 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 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 (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 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 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 (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 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: Electrical Data

    MCA = Minimum Circuit Ampacity. LRA = Locked Motor Amps 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: Functions, Controls, Options

    3. *These functions require a wired remote controller. 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 2. (Accessory model name) : Installed in the field; ordered and purchased separately by model number; supplied in separate package. 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: Accessories

    120W PQSH1200 Standard KUSXA361A, KUSXA421A, KUSXA481A 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 ACCESSORIES LG Monitoring View (LGMV) Diagnostic Software and Cable LG Monitoring View (LGMV) is a maintenance and troubleshooting tool for Multi V™ air conditioning systems. LGMV formats are available for computer or mobile phone use. The main screen for LGMV allows the user to view the following real time data: •...
  • Page 23 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: Outdoor Unit Dimensions

    Figure 8: KUSXA181A, KUSXA241A, KUSXA301A Outdoor Unit 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 25: Kusxa361A, Kusxa421A, Kusxa481A

    Figure 9: KUSXA361A, KUSXA421A, KUSXA481A Outdoor Unit 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 26: Outdoor Unit Center Of Gravity /Corner Weight

    14 3/16 17.4 19.9 93.4 81.8 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 27: Indoor Unit Dimensions

    Figure 11: KNUJB181A, KNUJB241A Indoor Unit 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 28: Knujb301A, Knujb361A

    Figure 12: KNUJB301A, KNUJB361A Indoor Unit 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 29: Knsjb421A, Knsjb481A

    Figure 13: KNSJB421A, KNSJB481A Indoor Unit 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 30: Air Flow

    • Table data is based at 230V. Air flow rate varies according to voltage fluctuation. 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: Acoustic Data

    Octave Band Center Frequency (Hz) Octave Band Center Frequency (Hz) 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: Sound Power For Outdoor Units

    Octave Band Center Frequency (Hz) Octave Band Center Frequency (Hz) 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: Sound Pressure For Indoor Units

    Figure 18: Mid Static Ducted LGRED° Indoor Unit Sound Pressure Level Diagrams. KNUJB181A KNUJB241A 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 Octave Band Center Frequency (Hz) KNSJB481A KNSJB421A 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: Sound Power For Indoor Units

    46.0 44.8 38.8 29.5 18.3 49.0 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 36: Performance Data

    PERFORMANCE DATA Cooling Capacity on page XX Maximum Cooling Capacity on page XX Heating Capacity on page XX Maximum Heating Capacity on page XX Correction Factors on page XX Check Selection on page XX...
  • Page 37 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 / or safety interruption. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 52 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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 2. Direct interpolation is permissible. Do not extrapolate. 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: 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 62: Defrost Correction Factor For Heating Operation

    • Verify that the sensible load of the zone is satisfied. 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: Application Guidelines

    APPLICATION GUIDELINES Placement / Clearance Considerations for Indoor Units on page XX Placement / Clearance Considerations for Outdoor Units on page XX Installing Outdoor Units Indoors on page XX...

  • Page 64: Placement / Clearance Considerations

    The unit will be damaged, will malfunction, and / or will not operate as designed if installed in any of the conditions listed. 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 Also, add a ceiling grille for ventilation. 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: Outdoor Units

    XX for information in reference to outdoor unit placement. 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: Planning For Snow And Ice

    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: Oceanside Applications

    Additional anti-corrosion treatment may need to be applied to the outdoor unit at oceanside locations. 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 Case 4 Minimum Standard Case 5 Minimum 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 Case 4 Minimum Standard Case 5 Minimum 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 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. Single Unit—High Rear and Front Walls...
  • Page 72 Minimum 24" Minimum 24" Minimum 40" 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 73: Installing Outdoor Units Indoors

    • Discharge and supply ductwork must be designed to avoid weather related long periods of water entrainment and the potential for microbial growth. 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 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 /min. = 89.9% (Within Allowable Limits) 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 76: Refrigerant Piping Design

    REFRIGERANT PIPING DESIGN Refrigerant Flow Diagrams on page XX Connection Limitations and System Layout on page XX Additional Refrigerant Charge on page XX Refrigerant Piping System Engineering on page XX...

  • Page 77: Refrigerant Flow Diagrams

    Pressure Sensor CN9_RD Pressure Switch CN_PRESS_SW 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 78: Outdoor Units Kusxa421A, Kusxa481A

    Pressure Sensor CN9_RD Pressure Switch CN_PRESS_SW 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: Indoor Units Knujb181A , Knujb241A

    Ø1/4 in. Flare side to outdoor 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 80: Indoor Units Knujb301A, Knujb361A, Knsjb421A, Knsjb481A

    Liquid (inch) KNUJB301A, KNUJB361A, KNSJB421A, KNSJB481A 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: Connection Limitations / System Layout

    CONNECTION LIMITATIONS / SYSTEM LAYOUT Various tools are available to assist in properly designing LG R32 split systems. Refer to the “R32 Application Guide”; the “Simple Calculator for Ca- pacity, Refrigerant Charge and ESP”; the “LG Air Conditioner Technical Solutions” (LATS) software program; and the local LG Sales Representative.

  • Page 82: Additional Refrigerant Charge

    246 feet. This will prevent any interruptions to unit operation and possible 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 83 Always follow local codes when selecting and installing copper pipe and piping system components. Approved piping for use with LG Single Zone products will be marked “R32 RATED” along the length of the pipe. Piping wall thickness must meet local code requirements and be approved for a maximum operating pressure of 626 psi. When bending piping, try to keep the number of bends to a minimum, and use the largest radii possible to reduce the equivalent length of installed piping;...

  • Page 84: Copper Expansion And Contraction

    4. Calculate the difference in the two expansion distance values. The result will be the change in pipe length. 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 L = Centerline 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 86 Failure to do so will cause significant performance degradation. Proper leak checks must be performed. Using isolation valves does not automatically void any LG product warranty, however, a limited warranty will be voided in whole or part if any field supplied accessory fail in any way that causes product failure.

  • Page 87: Pipe Supports

    Use a 4" + long sheet curved sheet metal saddles between hanger bracket and insulation to promote linear expansion/contraction. 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: Pipe Sleeves At Penetrations

    Pipe Sleeves at Penetrations LG recommends that all pipe penetrations through walls, floors, and pipes buried underground be properly insulated and routed through an appropriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and free movement of the pipe within the sleeve.

  • Page 89: Electrical

    ELECTRICAL General Guidelines on page XX Wiring Diagrams on page XX Power Supply / Power Wiring on page XX Communication / Connection Cable on page XX Controllers on page XX...

  • Page 90: General Guidelines

    Do not allow wire to touch refrigerant piping, the compressor or any moving parts since it can lead to mechanical 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 91: Wiring Diagrams

    To be connected to A/Coil / Furnace only. 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 92: Outdoor Units Kusxa301A, Kusxa361A

    To be connected to A/Coil / Furnace only. 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: Outdoor Units Kusxa421A, Kusxa481A

    To be connected to A/Coil / Furnace only. 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 94: Indoor Units Knujb181A , Knujb241A

    Figure 53: KNUJB181A , KNUJB241A Indoor Units Wiring Diagram. MEZ65014865 Rev.01 051024 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 95: Indoor Units Knujb301A,Knujb361A, Knsjb421A, Knsjb481A

    Figure 54: KNUJB301A,KNUJB361A, KNSJB421A, KNSJB481A Indoor Units Wiring 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 96: Indoor Units Wiring Diagram Legend

    Auxiliary Heater Relay Kit Second stage heat 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 • SW5 OFF: Fan discontinuous operation. There would be reduction in heating capacity while defrosting or oil return 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 98: Power Supply / Power Wiring

    1Φ, 208/230 V, 60 Hz Power Wiring (Including Ground) 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: Communication / Connection 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 100: Controllers

    Optional controllers (see “Functions, Controls, Options”, or contact an LG representative for more information) can connect to the indoor unit in one of two different ways. 1. LG Wired Remote Extension Cable with Molex plug (PZCWRC1; sold separately) that connects to the CN-REMO terminal on the indoor unit PCB.
  • Page 101 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: Limited Warranty (Usa)

    The product’s full Limited Warranty terms and conditions and arbitration re- quirements are available at https://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 103 LG Electronics, U.S.A., Inc. Air Conditioning Technologies 4300 North Point Parkway Alpharetta, Georgia 30022 EM_SZ_MidStaticDucted_R32_1_25 www.lghvac.com...

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