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LG PRHR Series Installation Manual

System heat recovery unit.
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Heat Recovery Unit
INSTALLATION MANUAL
MODELS: PRHR Series
website http://www.lgservice.com
System
IMPORTANT
• 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.
LG

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Table of Contents

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   Summary of Contents for LG PRHR Series

  • Page 1 System Heat Recovery Unit INSTALLATION MANUAL MODELS: PRHR Series IMPORTANT • 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.
  • Page 2: Table Of Contents

    PRHR Series Heat Recovery Unit Manual TABLE OF CONTENTS Required Parts Required Tools Installation Requirements Safety Precautions ....3 Features & Installation Part..4 Installation Selection the best location & Dimensional Drawings....5 I Pipes: Low Pressure Gas side I Electric drill HR Unit installation......6...
  • Page 3: Safety Precautions

    Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury.
  • Page 4: Features & Installation Part

    Features & Installation Part Features Connection Pipe (to outdoor unit) Control Box Coil assembly, Solenoid Connection Pipe (to outdoor unit) Connection Pipe (to indoor unit) Model PRHR020 PRHR030 PRHR040 Max. Connectable No. of Indoor Units Nominal Input Cooling Heating Net. Weight 41.9 44.1 46.3...
  • Page 5: Installation

    Installation Installation Selection of the best location I 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. •...
  • Page 6: Hr Unit Installation

    Installation HR Unit Installation • Select and mark the position for fixing bolts. • Insert the set anchor and washer onto the suspen- • Drill the hole for set anchor on the face of ceiling. sion bolts for locking the suspension bolts on the ceiling.
  • Page 7 Installation CAUTION: HR Unit should be installed that top side is facing up. If not, it may cause failure of the product. 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 circles on the figure. If not, it may cause injuries.
  • Page 8: Nection

    Installation Thermal Insulation Insulate the connected pipes completely(all thermal insulation must comply with local requirement) 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 9: Setup The Switch Of Hr Unit

    Installation Setup the switch of HR Unit 1. Main function of SW02M ON S/W Selection No.1 Method for addressing valves of an HR unit (Auto/Manual) No.2 Model of HR unit No.3 Model of HR unit No.4 No.5 No.6 SW02M No.7 Use only in factory production (preset to “OFF”) No.8 Use only in factory production (preset to “OFF”)
  • Page 10 Installation WARNING If you want to use a PRHR030 for 2 rooms HR unit after closing the 3rd pipes, set the dip switch for 2 rooms HR unit. If you want to use a PRHR040 for 3 rooms HR unit after closing the 4th pipes, set the dip switch for 3 rooms HR unit. If you want to use a PRHR040 for 2 rooms HR unit after closing the 3rd and 4th pipes, set the dip switch for 2 rooms HR unit.
  • Page 11 Installation 3. SW01M/SW03M/SW04M (Dip S/W and tact S/W for manual valve addressing) - Used in manual addressing of the valve in the HR unit - Set the address of the valve of the HR unit to the central control address of the connected indoor 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...
  • Page 12: Coil Exchanging Method

    Coil Exchanging Method Coil Exchanging Method 1. Remove the 2 securing screws. 2. Take out the connectors on the pcb. Remove the cover by pulling on the bottom of the Remove the 4 securing screws. cover and lifting up. Lay down the control box. 3.
  • Page 13 P/No.: MFL32987301 Printed in Korea After reading this manual, keep it in a place easily accessible to the user for future reference.

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