LG LZ-H GXN4 Series Installation Manual
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LG LZ-H GXN4 Series Installation Manual

LG LZ-H GXN4 Series Installation Manual

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INSTALLATION MANUAL
AIR
CONDITIONER
Please read this installation manual completely before installing the product.
Please retain this installation manual for future reference after reading it thoroughly.
VENTILATOR
Original instruction
MFL69268904
Rev.02_031924
Copyright © 2016 - 2024 LG Electronics Inc. All Rights Reserved.
www.lg.com

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Summary of Contents for LG LZ-H GXN4 Series

  • Page 1 CONDITIONER Please read this installation manual completely before installing the product. Please retain this installation manual for future reference after reading it thoroughly. VENTILATOR Original instruction www.lg.com MFL69268904 Rev.02_031924 Copyright © 2016 - 2024 LG Electronics Inc. All Rights Reserved.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS SAFETY PRECAUTIONS INTRODUCTION Feature Dimension Diagram STANDARD DRAWING OF INSTALLATION INSTALLATION Selection of the best location Ceiling dimension and hanging bolt location Indoor Unit Installation DRAIN PIPING AND WATER SUPPLY WORK Check the drainage Install the water supply piping Insulate all piping that passes indoors DUCT CONNECTION...

  • Page 3: Safety Precautions

    Safety Precautions Safety Precautions The following symbols are displayed on indoor and outdoor units. Read the precautions in this manual This appliance is filled with flammable carefully before operating the unit. refrigerant (R32) This symbol indicates that a service This symbol indicates that the personnel should be handling this Operation Manual should be read equipment with reference to the...
  • Page 4 Safety Precautions • Install the panel and the cover of control box securely. - There is risk of fire or electric shock. • Always install a dedicated circuit and breaker. - Improper wiring or installation may cause fire or electric shock •...
  • Page 5 Safety Precautions • Do not install this product in a refrigerated warehouse, heated swim- ming pool or other location where the temperature and humidity are significantly different. - There is risk of electrical shock, malfunctioning. • Install this product in an environment where the temperature ranges from -15°C to +45°C and the relative humidity is less than 80%.
  • Page 6 Safety Precautions • Do not store or use flammable gas or combustibles near the prod- uct. - There is risk of fire or failure of product. • When flammable gas leaks, turn off the gas and open a window for ventilation before turn the product on.
  • Page 7 Safety Precautions • Keep level even when installing the product. - To avoid vibration or water leakage. • Use two or more people to lift and transport the product. - Avoid personal injury. • Do not install the product where it will be exposed to sea wind (salt spray) directly.
  • Page 8 Safety Precautions • Servicing shall only be performed as recommended by the equip- ment manufacturer. Maintenance and repair requiring the assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable refrigerants. (for R32) 8 Ventilator...
  • Page 9 Safety Precautions Minimum floor area (for R32) - The appliance shall be installed, operated and stored in a room with a floor area larger than the mini- mum area. - Use the graph of table to determine the minimum area. Amin (m Floor standing Wall mounted...

  • Page 10: Introduction

    Introduction Introduction Feature Dimension Diagram • 500 / 800 / 1 000 CMH Application tools (CMH) Unit : mm Pitch of Suspension Pipe Connec- Drain Hose Water Supply Pip- Wei- Figure Duct Pitch Width Fixture tion Connection ing Connection Capacity 500 CMH 1667 1140 365 599 1006 1204 185 242 252 74 510 488 449 70 67 278 29...

  • Page 11: Standard Drawing Of Installation

    Standard drawing of installation Standard drawing of installation • 500 / 800 / 1 000 CMH (LZ-H***GXN4) Air supply grille Ceiling suspension bolts position (user-supplied) Air return grille (user-supplied) (Exaust air outlet) (Fresh air outlet) Y duct connecting (user-supplied) Inspection Inspection hatch hatch...
  • Page 12 Standard drawing of installation • 500 / 800 / 1 000 CMH (LZ-H***GXH4) Air supply grille Ceiling suspension bolts position (user-supplied) Air return grille (user-supplied) (Exaust air outlet) (Fresh air outlet) Y duct connecting (user-supplied) Inspection Inspection hatch hatch 150~200 Maintenance space Total heat Excha nger Air Filter...

  • Page 13: Installation

    Installation Installation Read completely, then follow step by step. Selection of the best location Install the ventilator in the location that satisfies the following conditions. • The place shall easily bear a load exceeding four times the indoor unit’s weight. •...

  • Page 14: Ceiling Dimension And Hanging Bolt Location

    Installation Ceiling dimension and hanging bolt location Installation of Unit Install the unit above the ceiling correctly. CASE 1 POSITION OF SUSPENSION BOLT • Apply a Flexible duct between the unit and duct to absorb unnecessary vibration. 1006 Return Air(RA) Exhaust Air(EA) Supply Air(SA) Outdoor Air(OA)

  • Page 15: Indoor Unit Installation

    Installation Indoor Unit Installation • Select and mark the position for fixing bolts. • Insert the set anchor and washer onto the • Drill the hole for set anchor on the face of ceiling. suspension bolts for locking the suspen- sion bolts on the ceiling.
  • Page 16 Installation • Attach the hanger bracket to the suspension bolt. Be sure to fix it securely by using nuts and washers (locally procured) from the upper and lower sides of the hanger bracket. • Install the unit after checking the indoor (SA/RA) and outdoor (EA/OA) in accordance with the figure duct direction label.

  • Page 17: Drain Piping And Water Supply Work

    Drain Piping and Water Supply Work Drain Piping and Water Supply Work Thermal insulator • Always lay the drain with downward (Local supply) inclination (1/100 to 1/50). Drainage pipe Prevent any upward flow or reverse flow (Local supply) in any part. Unit •...

  • Page 18: Check The Drainage

    Drain Piping and Water Supply Work Check the drainage • Test the drainage by pouring 1000cc of water into the drain pan through the inspection hole by remov- ing the maintenance cover (8 screws) or through the outlet duct joint of supply air to room (SA). •...

  • Page 19: Insulate All Piping That Passes Indoors

    Drain Piping and Water Supply Work Insulate all piping that passes indoors • After checking that the drain piping connections do no leakage, insulate them using the insulation. (Tighten with a clamp material) • Wrap the drain piping with insulation to prevent condensation from forming. Tie wrap (Locally procured) Insulation...

  • Page 20: Duct Connection

    Duct Connection Duct Connection • After securely connect the duct with the duct connection flange, wrap it with a commercial aluminium tape so that air cannot be leaked. • Adjust the duct from the ceiling so that no force is applied to the main body of the ventilation system. •...

  • Page 21: Connecting Pipes

    Connecting Pipes Connecting Pipes Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the follow- Copper ing procedure. Slanted Uneven Rough tube 90° Cut the pipes and the cable. • Use the accessory piping kit or the pipes pur- chased locally.

  • Page 22: Connecting The Pipings To The Indoor Unit And Drain Hose To Drain Pipe

    Connecting Pipes Connecting the pipings to the indoor unit and drain hose to drain pipe • Align the center of the pipings and sufficiently tighten the flare nut by hand. • Tighten the flare nut with a wrench. Indoor unit tubing Flare nut Pipings Outside diameter...

  • Page 23: Wiring Connection

    Wiring Connection Wiring Connection Electrical Wiring Perform the electrical wiring work according to the electrical wiring connection. • All wiring must comply with local requirements. • Select a power source that is capable of supply- ELCB ing the current required by the ventilator. Main power source Switch box...
  • Page 24 Wiring Connection Connecting Cable Specification : The connecting cable, being used to connect the indoor unit and outdoor unit, should be complied with IEC 60335-1 standard (This equipment shall be provided with a cord set complying with the national regulation). If the supply cable is damaged, it must be replaced by a special cable or assembly available from the manufacturer or its service agent.

  • Page 25: Method To Connect Wiring

    Wiring Connection Method to Connect Wiring • Pass the power supply wiring and the ground wiring through the wiring through-hole into the electri- cal parts box and secure with the included clamping material after connecting the wires to terminal blocks. Main Power Accessory Terminal Block...
  • Page 26 Wiring Connection Clamping of cables Arrange 2 power cables on the control panel. First, fasten the Plastic clamp with screw to the inner boss of control panel. 485 PCB Screw Main PCB Clamp Power Supply Wiring Terminal Block Motor Driver PCB Sub PCB Remote Controller Wiring...

  • Page 27: Wiring For The Humidity Regulator (Locally Procured)

    Wiring Connection Wiring for the Humidity Regulator (Locally Procured) <LZ-H***GXH series only> Pass into the electric parts box together with the power wire through the power wiring through-hole. Remove the short-circuit wires on the accessory terminal block and connect the wiring for the humidity regulator.

  • Page 28: Wiring Example

    Wiring Connection Wiring Example • This unit can be used as part of the combined operation system used together with indoor units (Multi-V system air conditioners), or as an independent system for processing outside air. <Combined operation system with Multi-V system(connected with ventilation units and stan- dard indoor units in a single refrigerant circuit)>...

  • Page 29: Installer Setting And Test Run

    Installer Setting and Test Run Installer Setting and Test Run Installer Setting - How to enter installer setting mode CAUTION Installer setting mode is to set the detail function of the remote controller. If the installer setting mode is not set correctly, it can cause problems to the product, user injury or property damage.
  • Page 30 Installer Setting and Test Run • In the menu screen, press [<,>(left/right)] button to select the setting category, and press [∧(up)] button for 3 seconds to enter the password input screen for the installer setting. • Input the password and press [OK] button to move to the installer setting list. ※Installer setting password Main screen →...

  • Page 31: Installer Setting - Function Explanation

    Installer Setting and Test Run Installer Setting - Function explanation Test Run When installing the product, test operation for checking the installation status Setting Address of Central Control When connecting central control, it sets the address of central control address of indoor unit. Supply/Exhaust ESP setting Set the E.S.P(RPM) value of air conditioner indoor unit.
  • Page 32 Installer Setting and Test Run Zone Stats Set the wind strength option of indoor unit as Variable or fixed. Selecting Celsius or Fahrenheit Control the temperature control unit by changing it Celsius ↔ Fahrenheit. Humidification for Singlar Ventilation Set the power supply to humidification When operating Singular ventilation of Direct Expansion or General Ventilation unit.

  • Page 33: Run The Humidifier

    Installer Setting and Test Run Run the humidifier <LZ-H***GXH series only> Check that the water supply piping is connected securely. Open the water supply shut-off valve. (No water will be supplied at this time.) Run the ERV™ unit in heating mode. (See the operating manual included with the indoor unit for details on how to run the unit in heating mode.) The water supply will start and the humidifier will begin operation.

  • Page 34: Airborne Noise Emission

    In case of finding a problem at a test run In case of finding a problem at a test run Symptom Check Item Counter-measure The Product doesn't work Is power not supplied? Supply Power The Product doesn't work through Is the Indoor temperature less It's standby mode for protecting you press the 'ON' switch than 45°C or more than 40°C?
  • Page 35 LG Electronics Inc. Single Point of Contact (EU/UK) & EU Importer : LG Electronics European Shared Service Center B.V. Krijgsman 1, 1186 DM Amstelveen, The Netherlands Manufacturer : LG Electronics Inc. 84, Wanam-ro, Seongsan-gu, Changwon-si, Gyeongsangnam-do, KOREA UK Importer : LG Electronics U.K.

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