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LG Multi V PRHR042A Installation Manual

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INSTALLATION MANUAL
AIR
CONDITIONER
Please read this installation manual completely before installing the product.
Installation work must be performed in accordance with the national wiring
standards by authorized personnel only.
Please retain this installation manual for future reference after reading it
thoroughly.
(Heat Recovery Unit)
PRHR042A/PRHR032A/PRHR022A
P/NO : MFL32987309
Copyright © 2014 - 2018 LG Electronics Inc. All Rights Reserved.
http://www.lghvac.com
www.lg.com

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  Summary of Contents for LG Multi V PRHR042A

  • Page 1 Installation work must be performed in accordance with the national wiring standards by authorized personnel only. Please retain this installation manual for future reference after reading it thoroughly. (Heat Recovery Unit) PRHR042A/PRHR032A/PRHR022A http://www.lghvac.com www.lg.com P/NO : MFL32987309 Copyright © 2014 - 2018 LG Electronics Inc. All Rights Reserved.
  • Page 2: Tips For Saving En

    TIPS FOR SAVING ENERGY TIPS FOR SAVING ENERGY Here are some tips that will help you minimize the power consumption when you use the air conditioner. You can use your air conditioner more efficiently by referring to the instructions below: •...
  • Page 3 IMPORTANT! Please read this instruction sheet completely before installing the product. This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently. •...
  • Page 4: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS IMPORTANT SAFETY INSTRUCTIONS READ ALL INSTRUCTIONS BEFORE USING THE APPLIANCE. Always comply with the following precautions to avoid dangerous situations and ensure peak performance of your product WARNING It can result in serious injury or death when the directions are ignored CAUTION It can result in minor injury or product damage when the directions are ignored WARNING...
  • Page 5 IMPORTANT SAFETY INSTRUCTIONS • Do not touch the power switch with wet hands. - There is risk of fire, electric shock, explosion, or injury. • Securely install the cover of control box and the panel. - If the cover and panel are not installed securely, dust or water may enter the HR unit and fire or electric shock may result.
  • Page 6: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS TIPS FOR SAVING EN- ERGY IMPORTANT SAFETY IN- STRUCTIONS FEATURES INSTALLATION PART INSTALLATION Selection of the best location Dimensional drawings HR Unit Installation Thermal Insulation Wiring Connection Setup the switch of HR Unit COIL EXCHANGING METHOD JOINT METHOD OF HR UNIT...
  • Page 7: Features

    FEATURES FEATURES Connection Pipe (to outdoor unit) Control Box Coil assembly, Solenoid Connection Pipe (to outdoor unit) Connection Pipe (to indoor unit) Model PRHR022A PRHR032A PRHR042A Max. Connectable No. of Indoor Units Max. Connectable No. of Indoor Units of a branch Cooling Nominal Input Heating...
  • Page 8: Installation Part

    INSTALLATION PART INSTALLATION PART - Installation Manual - Hanging bolts (4 x M10 or M8, Nut(8 x M10 or M8), Flat washers(8 x M10) - Reducers [Unit : mm(inch)] Gas pipe Models Liquid pipe High pressure Low pressure OD22.2(7/8) Ø19.05(3/4) Ø15.88(5/8) OD19.05(3/4) Ø15.88(5/8) Ø12.7(1/2) PRHR022A...
  • Page 9: Installation

    INSTALLATION INSTALLATION Selection of the best location Select installation location of the HR unit suitable for following conditions - Avoid a place where rain may enter since the HR unit is for indoor. - Sufficient service space must be obtained. - Refrigerant pipe must not exceed limited length.
  • Page 10 INSTALLATION [Unit : mm(inch)] Description Part Name PRHR032A/PRHR042A PRHR022A Low pressure Gas pipe con- Ø28.58(1-1/8) Brazing con- Ø22.2(7/8) Brazing connec- nection port nection tion High pressure Gas pipe con- Ø22.2(7/8) Brazing connec- Ø19.05(3/4) Brazing connec- nection port tion tion Ø15.88(5/8) Brazing connec- tion(PRHR042A) Ø9.52(3/8) Brazing connec- Liquid pipe connection port...
  • Page 11: Hr Unit Installation

    INSTALLATION HR Unit Installation Using an insert-hole-in- anchor, hang the suspension bolt. - Select and mark the position for fixing bolts. Install a hexagon nut and a flat washer (lo- - Drill the hole for set anchor on the face of cally-procured)to the suspension bolt as ceiling.
  • Page 12 INSTALLATION CAUTION HR Unit should be installed that top side is facing up. If not, it may cause failure of the prod- uct. Ceiling Top side Top side Top side WARNING Before brazing work, remove gas in the HR Unit by cutting the three pipes in the small cir- cles on the figure.
  • Page 13: Thermal Insulation

    INSTALLATION Insulation Insulate the connected pipes completely(all thermal insulation must comply with local require- ment) Make sure that there is no clearance here Thermal insulator for refrigerant pipe(Local supply) Refrigerant pipe (Local supply) Overlap with thermal Thermal insulator for refrigerant pipe insulator for piping (Local supply) CAUTION...
  • Page 14: Wiring Connection

    INSTALLATION Wiring Connection Connect the wires to the terminals on the control board individually according to the outdoor unit connection. - Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of HR Unit respectively.
  • Page 15: Setup The Switch Of Hr Unit

    INSTALLATION Setup the switch of HR Unit Main function of SW02M SW02M ON S/W Selection No.1 Method for pipe detection of an HR unit (Auto/Manual) No.2 Model of HR unit No.3 Model of HR unit No.4 Model of HR unit No.5 Valve group setting No.6...
  • Page 16 INSTALLATION 3) Selection of the model of the HR unit (For 2 branches) (For 3 branches) (For 4 branches) PRHR022A PRHR032A PRHR042A Initial Setting 1 branch Connected 2 branches Connected 3 branches Connected 4 branches Connected h Each model is shipped with the switches No.2 and No.3 pre-adjusted as above in the factory. WARNING •...
  • Page 17 INSTALLATION 4) Setting the Valve Group DIP S/W setting Example Indoor Unit Indoor Unit Not control Indoor Unit Indoor Unit Indoor Unit No.1, 2 Valve Indoor Unit Large capacity indoor unit Control Indoor Unit No.2, 3 Valve Large capacity indoor unit Control Indoor Unit Large capacity indoor unit...
  • Page 18 INSTALLATION SW05M (Rotary S/W for addressing HR unit) Must be set to '0' when installing only one HR unit. When installing multiple HR units, address the HR units with sequentially increasing numbers starting from '0'. Maximum 16 HR Units can be installed. Ex) Installation of 3 HR units SW01M/SW03M/SW04M (Dip S/W and tact S/W for manual valve addressing)
  • Page 19 INSTALLATION 2) Zoning setting - Set the address of the valve of the HR unit to the central control address of the connected in- door unit. - SW01M : selection of the valve to address SW03M : increase in the digit of 10 of valve address SW04M : increase in the last digit of valve address SW05M :Rotary S/W - Prerequisite for manual valve addressing : central control address of each indoor unit must be...
  • Page 20: Coil Exchanging Method

    COIL EXCHANGING METHOD COIL EXCHANGING METHOD Remove the 2 securing screws. Take out the connectors on the pcb. Remove the cover by pulling on the bottom Remove the 4 securing screws. of the cover and lifting up. Lay down the control box. Remove the 4 securing screws.
  • Page 21: Joint Method Of Hr Unit

    JOINT METHOD OF HR UNIT JOINT METHOD OF HR UNIT Joint Method is required when use indoor unit that exceed 54k is installed. In Joint Method, two neighboring outlets of one HR unit are linked by Y branch pipe and connected to one indoor unit. HR Unit HR Unit (96k)
  • Page 23 Please call the installing contractor of your product, as warranty service will be provided by them. Service call Number # : (888) LG Canada, (888) 542-2623 CANADA Numéro pour les appels de service : LG Canada, 1-888-542-2623...

This manual is also suitable for:

Multi v prhr032aMulti v prhr022a