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INSTALLATION MANUAL
FOR LG AIR HANDLER UNIT (AHU)
COMMUNICATIONS KIT
AHU Model Number: PAHCMR000

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   Summary of Contents for LG PAHCMR000

  • Page 1 INSTALLATION MANUAL FOR LG AIR HANDLER UNIT (AHU) COMMUNICATIONS KIT AHU Model Number: PAHCMR000...
  • Page 2 3. For more materials such as submittals, catalogs, engineering, installation, owner’s, and service manuals, visit www.lghvac.com. For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice. © LG Electronics U.S.A., Inc.
  • Page 3: Table Of Contents

    PRLK048A0 and PRLK096A0 Wiring ������������������������������������������������������������������������������������������������������������������������������������������40 PRLK396A0 Wiring ����������������������������������������������������������������������������������������������������������������������������������������������������������������������41 Testing ......................................42 Troubleshooting ....................................43 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 4: Safety Precautions

    There is risk of product malfunction� Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 5 Failure to carefully read and follow all instructions in this manual can result in equipment malfunction and property damage� Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 6 There is risk of product failure or malfunction� Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 7: Ahu Kit Introduction

    PAHCMR000 AHU Communications Kit features are: • It can be used with LG Multi V air or water source outdoor units and LG Single Zone outdoor units. • It supports AHU coil capacities from 12 - 396 kBtu/h.
  • Page 8: Specifications, Components List

    (One [1] Pipe In, One [1] Pipe Out) Due to our policy of continuous product innovation, some specifications may 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: Ahu Communications Kit Installation

    30% of the air-source/water-source unit capacity Due to our policy of continuous product innovation, some specifications may 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: Dip Switch Settings

    2) If using group control, the maximum length of the group control cable is 164ft including remote controller 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 11 2. If connecting the PRLK396A0 EEV kit to a Multi V outdoor unit, set DIP switches 1, 2, 3, and 4 to ON to set capacity to 192 kBtu/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 12: Ahu Communications Kit Parts

    One (1) Bracket One (1) Panel Assembly,Control Three (3) Due to our policy of continuous product innovation, some specifications may 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: Ahu Communications Kit Mounting

    Size (inch) Model PAHCMR000 11-13/16 6-3/32 11-13/16 10-1/4 10-1/4 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 14: Wiring Diagram

    *** This output can be used to start/stop an AHU single-speed fan Due to our policy of continuous product innovation, some specifications may 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 NTC 5kΩ, 16.4ft Outlet pipe (Gas) Temp. sensor Due to our policy of continuous product innovation, some specifications may 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: Power Wiring

    4. Tighten the cable nut. Power Terminal Block Cable Insert Due to our policy of continuous product innovation, some specifications may 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: Communications Wiring

    • Multi V IDU (RS485 Ch2) Cable Insert Due to our policy of continuous product innovation, some specifications may 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: Connection For Fan Signal

    220-240 V ~ 50/60 Hz 1Ø, 208/230 V ~ 60 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 19: Thermistor Installation

    Thermistors must be securely attached for proper 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 20 Due to our policy of continuous product innovation, some specifications may 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: Solutions Overview

    2. Refer to Universal Input – UI Setting #1 for more detail Due to our policy of continuous product innovation, some specifications may 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 AHU Communication Kit for Return air control. A fixed target evaporator or condensing temperature (T ) can be changed in MULTI V and Single outdoor function code setting. LG wired remote controller and LG Central Controller can be optionally applied, but only monitoring function is possible.
  • Page 23 ) by transferring Modbus signal to the AHU Room Communication Kit for Return air control. To control room air, the LG wired controller can be purchased optionally. A fixed target evaporator or condensing temperature (T ) can be changed in MULTI V and Single Zone outdoor function code setting.
  • Page 24 Note : Maintain previous value when getting intermediate value to UI4 Due to our policy of continuous product innovation, some specifications may 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 Fan mode operation control Short Short Non voltage Due to our policy of continuous product innovation, some specifications may 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 250VAC / 3A Fan_Stop O ‘ 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 27 ) s r Due to our policy of continuous product innovation, some specifications may 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 (Sequential Start up is not operated in case of cooling operation) Example ODU Startup 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 29: External Connection Diagrams

    3. LG controller can be optionally applied with DDC. Due to our policy of continuous product innovation, some specifications may 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 3. LG controller can be optionally applied with DDC. Due to our policy of continuous product innovation, some specifications may 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 3. LG controller can be optionally applied with DDC. Due to our policy of continuous product innovation, some specifications may 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 3. LG controller can be optionally applied with DDC. Due to our policy of continuous product innovation, some specifications may 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 1. Central control address ’02:XX’ can be set to any number in the range 00 ~ FF. Due to our policy of continuous product innovation, some specifications may 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: Control Functions

    2. To change slave address, refer to main module address setting. Due to our policy of continuous product innovation, some specifications may 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: Eev Kit Installation

    Introduction Figure 16: EEV Kit. When used with the LG AHU Communications Kit (sold separately), the LG EEV Kit controls refrigerant flow between LG Multi V air-source or water-source units and a third-party air handler unit (AHU). The EEV Kits for PAHCMR000 are offered in three sizes: •...
  • Page 36: Parts

    One (1) Bracket Two (2) Panel, Base One (1) Due to our policy of continuous product innovation, some specifications may 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: Mounting The Eev Kit

    1/4” Pipe diameter 5/8” Pipe diameter 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 38: Preparing The Pipes

    Failure to properly insulate the pipe after welding may result in leakage. Due to our policy of continuous product innovation, some specifications may 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: Brazing And Insulating The Piping

    (4) M4 screws. Liner Due to our policy of continuous product innovation, some specifications may 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: Prlk048a0 And Prlk096a0 Wiring

    PCB diagram for the AHU Communications Kit� If the wiring is incorrect, the products will malfunction� Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 41: Prlk396a0 Wiring

    BL : Blue WH : White Due to our policy of continuous product innovation, some specifications may 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: Testing

    • Buttons 3, 4, 11, 12 on the wired remote controller do not operate� Due to our policy of continuous product innovation, some specifications may 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: Troubleshooting

    Check the piping connections between the EEV Kit and the 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 44 Pipe out thermistor has disconnected from AHU, or has short CH06 Pipe Out Thermistor Error circuited. Due to our policy of continuous product innovation, some specifications may 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 Contact your LG representative if you have any questions about the AHU Communications Kit or its installation.
  • Page 46 LG Customer Information Center, Commercial Products 1-888-865-3026 USA LG Electronics, U.S.A., Inc. Follow the prompts for commercial A/C products. Commercial Air Conditioning Division 4300 North Point Parkway Alpharetta, Georgia 30022 www.lg-vrf.com IM_AHU_Comm_Kit_PAHCMR000_8_18...

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