LG KSUAB091A Engineering Manual
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LG KSUAB091A Engineering Manual

LG KSUAB091A Engineering Manual

R32 single zone high efficiency
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R32 SINGLE ZONE HIGH EFFICIENCY
ENGINEERING MANUAL
KSUAB091A (9,000 Btu/h)
KSUAB181A (18,000 Btu/h)
KSUAB121A (12,000 Btu/h)

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  • Page 1 R32 SINGLE ZONE HIGH EFFICIENCY ENGINEERING MANUAL KSUAB091A (9,000 Btu/h) KSUAB181A (18,000 Btu/h) KSUAB121A (12,000 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 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: Lg Air Conditioner Technical Solution (Lats)

    LATS can generate an Excel GERP report that can be imported into the LG SOPS pricing and ordering system.

  • Page 5: Table Of Contents

    Controllers ..........................................75-76 Limited Warranty ���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������� 77 Due to our policy of continuous product innovation, some specifications 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 R410A.

  • Page 7: Product Data

    PRODUCT DATA Nomenclature on page 8 Pairing Table on Page 9 Mechanical Specifications on page 10 General Data on page 11 Electrical Data on page 13 Functions, Controls, and Options on page 14 Accessories on page 15 Outdoor Unit Dimensions on page 17 Outdoor Unit Center of Gravity / Corner Weight on page 19 Indoor Unit Dimensions on page 20 Air Flow, Temperature Distribution Graphs on page 22...

  • Page 8: 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

    KNUAB091A, KNUAB121A AKB76044208 KUSAB181A KNUAB181A AKB76044208 Due to our policy of continuous product innovation, some specifications 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: General Data

    (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 12 (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 13: Electrical Data

    LRA = Locked Motor Amps RLA = Rated Load 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 14: Functions, Controls, Options

    BACnet® is a registered trademark of ASHRAE. LonWorks® is a trademark of Echelon Corporation. Due to our policy of continuous product innovation, some specifications 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: Accessories

    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 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: Outdoor Unit Dimensions

    19/32(15) 13(330) 21-15/32(545) 13-29/32(353) 9-7/32(234) 11-31/32(304) Due to our policy of continuous product innovation, some specifications 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 32-3/4 (832) 3-9/32 (83) 5-9/16 (141) Due to our policy of continuous product innovation, some specifications 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: Outdoor Unit Center Of Gravity / Corner Weight

    23-7/32 12-19/32 5-29/32 24-13/32 14-3/16 17.6 23.1 46.3 40.8 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 20: Indoor Unit Dimensions

    2-9/16(65) 1-15/32(37) 2-7/16(62) 12-1/8(308) 12-1/8 (308) Due to our policy of continuous product innovation, some specifications 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 2-3/470 1-27/32(47) 13-19/32 (345) 2-3/4(70) 13-19/32(345) Due to our policy of continuous product innovation, some specifications 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: Air Flow, Temp. Distribution Graphs

    Air Speed 0.3 m/s (1 ft./s) Range : 13.0 m (42.7 ft.) Due to our policy of continuous product innovation, some specifications 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 Air Speed 0.3 m/s (1 ft./s) Range : 13.5 m (44.3 ft.) Due to our policy of continuous product innovation, some specifications 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 Air Speed 0.3 m/s (1 ft./s) Range : 15.7 m (51.5 ft.) Due to our policy of continuous product innovation, some specifications 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 Air Speed 0.3 m/s (1 ft./s) Range : 18.3 m (60.0 ft.) Due to our policy of continuous product innovation, some specifications 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 Acoustic Data

    Pressure Level Diagram. Pressure Level 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 27 Figure 18: KUSAB181A Outdoor Unit Heating Sound Pressure Level Diagram. Level 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 28: Indoor Unit Acoustic Data

    Model Cooling Heating KNUAB091A KNUAB121A KNUAB181A Due to our policy of continuous product innovation, some specifications 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 Sound Pressure Level Diagram. Pressure Level 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 30 Figure 23: KNUAB181A Indoor Unit Heating Sound Pressure Level Diagram. Level 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 31: Performance Data

    PERFORMANCE DATA Cooling Capacity on page 32 Maximum Cooling Capacity on page 35 Heating Capacity on page 38 Maximum Heating Capacity on page 41 Correction Factors on page 44 Check Selection on page 45...

  • Page 32: Cooling Capacity

    2. Low Ambient Wind Baffle Kit (sold separately) allows operation down to 0°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 33 2. Low Ambient Wind Baffle Kit (sold separately) allows operation down to 0°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 34 2. Low Ambient Wind Baffle Kit (sold separately) allows operation down to 0°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 35: Maximum Cooling Capacity

    2. Low Ambient Wind Baffle Kit (sold separately) allows operation down to 0°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 36 2. Low Ambient Wind Baffle Kit (sold separately) allows operation down to 0°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 37 2. Low Ambient Wind Baffle Kit (sold separately) allows operation down to 0°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 38: Heating Capacity

    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 39 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 40 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 41: Maximum Heating Capacity

    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 42 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 43 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 44: 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 45: Check Selection

    • Use caution when sizing to meet listed capacity specifications for the scheduled manufacturer’s equipment. If further system design assistance is needed, or you have a unique application you would like to discuss, contact an LG sales rep. Due to our policy of continuous product innovation, some specifications may change without notification.

  • Page 46: Application Guidelines

    APPLICATION GUIDELINES Placement / Clearance Considerations for Indoor Units on page 47 Placement / Clearance Considerations for Outdoor Units on page 49 Installing Outdoor Units Indoors on page 53...

  • Page 47: Indoor Unit 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 48 Also, add a ceiling grille for Heat or steam source 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 49: Outdoor Unit Placement / Clearance Considerations

    Outdoor unit requires condensate drain piping. Condensate drain pipe is constructed with materials approved by local code. See section on 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 50: 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 51: 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 52 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 53: 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 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 /min. = 247% (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 56: Refrigerant Piping Design

    REFRIGERANT PIPING DESIGN Refrigerant Flow Diagrams on page 57 Connection Limitations and System Layout on page 59 Additional Refrigerant Charge on page 60 Refrigerant Piping System Engineering on page 61...

  • Page 57: Indoor Unit

    KSUAB091A, KSUAB121A Units 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 58 KUSAB181A Indoor Units 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 59: Connection Limitations And 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 60: Additional Refrigerant Charge

    ADDITIONAL REFRIGERANT CHARGE 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 61: Refrigerant Piping System Engineering

    REFRIGERANT PIPING SYSTEM ENGINEERING 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 62: Copper Expansion And Contraction

    REFRIGERANT PIPING SYSTEM ENGINEERING 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 63 REFRIGERANT PIPING SYSTEM ENGINEERING 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 64 REFRIGERANT PIPING SYSTEM ENGINEERING 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 65: Pipe Supports

    REFRIGERANT PIPING SYSTEM ENGINEERING 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 66: Pipe Sleeves At Penetrations

    REFRIGERANT PIPING SYSTEM ENGINEERING 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 67: Electrical

    ELECTRICAL General Guidelines on page 68 Wiring Diagrams on page 69 Power Supply / Power Wiring on page 72 Communication / Connection Cable on page 73 Controllers on page 75...

  • Page 68: 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 69: Wiring Diagrams

    * This function can be optional or factory installed depending on the application model. Due to our policy of continuous product innovation, some specifications may change without notification. © LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG ” is a registered trademark of LG Corp.
  • Page 70 * This function can be optional or factory installed depending on the application model. Due to our policy of continuous product innovation, some specifications may change without notification. © LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG ” is a registered trademark of LG Corp.
  • Page 71 MEZ64135656 Rev.01_090524 depending on the application model. Due to our policy of continuous product innovation, some specifications may change without notification. © LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG ” is a registered trademark of LG Corp.

  • Page 72: 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 73: Communication / Connection Cable

    Failure to do so will lead to electric shock which can cause physical injury or death. Wiring Due to our policy of continuous product innovation, some specifications 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 Figure 52: KSUAB091A, KSUAB121A, KSUAB181A System Electrical 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 75: Controller Options

    4 5 6 13 14 15 Due to our policy of continuous product innovation, some specifications 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 Due to our policy of continuous product innovation, some specifications 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: Limited Warranty

    “The product’s full Limited Warranty terms and conditions and arbitration requirements 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 78 LG Electronics, U.S.A., Inc. Air Conditioning Technologies 4300 North Point Parkway Alpharetta, Georgia 30022 NEW ISSUE: EM_SZ_HighEfficiency_R32_12_24 www.lghvac.com...

This manual is also suitable for:

Ksuab121aKsuab181a

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