LG UU50WR2 Installation Manual
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LG UU50WR2 Installation Manual

LG UU50WR2 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.
Single Inverter Outdoor Unit
Original instruction (R32)
MFL71666407
Rev.00_221012
Copyright © 2019 - 2022 LG Electronics Inc. All Rights Reserved.
www.lg.com

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  • 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. Single Inverter Outdoor Unit Original instruction (R32) www.lg.com MFL71666407 Rev.00_221012 Copyright © 2019 - 2022 LG Electronics Inc. All Rights Reserved.
  • Page 2 MODEL DESIGNATION MODEL DESIGNATION Airborne Noise Emission The A-weighted sound pressure emitted by Product information this product is below 70 dB. ** The noise level can vary depending on the - Product Name : Air conditioner site. - Additional Information : serial number is The figures quoted are emission level and are refer to the barcode on the product.
  • Page 3 SAFETY INSTRUCTIONS SAFETY INSTRUCTIONS The following symbols are displayed on indoor and outdoor units. Read the precautions in this This appliance is filled with manual carefully before flammable refrigerant (for R32) operating the unit. This symbol indicates that a This symbol indicates that the service personnel should be Operation Manual should be handling this equipment with...
  • Page 4 SAFETY INSTRUCTIONS • Servicing shall only be performed as recommended by the equipment 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) •...
  • Page 5 SAFETY INSTRUCTIONS • For installation, removal or reinstall, always contact the dealer or an Authorized Service Center. - There is risk of fire, electric shock, explosion, or injury. • Do not install the product on a defective installation stand. Be sure that the installation area does not deteriorate with age.
  • Page 6 SAFETY INSTRUCTIONS • Do not use the product in a tightly closed space for a long time. Perform ventilation regularly. - Oxygen deficiency could occur and hence harm your health. • Do not open the front grille of the product during operation. (Do not touch the electrostatic filter, if the unit is so equipped.) - There is risk of physical injury, electric shock, or product failure.
  • Page 7 • Pipe-work shall be protected from physical damage. • Use the deoxidized copper as piping materials to install. • If anyone other than a licensed Professional installs, repairs, or alters LG Electronics Air Conditioning Products, the warranty is voided. - All costs associated with repair are then the full responsibility of the owner.
  • Page 8 SAFETY INSTRUCTIONS • Means for disconnection must be incorporated in the fixed wiring in accordance with the wiring rules. • Appliance shall be disconnected from its power source during service and when replacing parts. • Do not block the inlet or outlet of air flow. - It may cause product failure.
  • Page 9 SAFETY INSTRUCTIONS • Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open. - Moisture may condense and wet or damage furniture. • Do not expose your skin or kids or plants to the cool or hot air draft. - This could harm to your health.
  • Page 10 SAFETY INSTRUCTIONS Recovery (For R32) When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely. When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge are available.
  • Page 11 SAFETY INSTRUCTIONS Removal and evacuation (For R32) When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall be used. However, for flammable refrigerants it is important that best practice is followed since flammability is a consideration. The following procedure shall be adhered to: •...
  • Page 12 SAFETY INSTRUCTIONS If a leak is suspected, all naked flames shall be removed/extinguished. If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by means of shut off valves) in a part of the system remote from the leak.
  • Page 13 SAFETY INSTRUCTIONS General work area (For R32) All maintenance staff and others working in the local area shall be instructed on the nature of work being carried out. Work in confined spaces shall be avoided. Checking for presence of refrigerant (For R32) The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially flammable atmospheres.
  • Page 14 SAFETY INSTRUCTIONS Checks to electrical devices (For R32) Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures. If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with. If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used.
  • Page 15 SAFETY INSTRUCTIONS Decommissioning (For R32) Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail. It is recommended good practice that all refrigerants are recovered safely. Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of reclaimed refrigerant.

  • Page 16: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS MODEL DESIGNATION TIPS FOR SAVING ENERGY IMPORTANT SAFETY INSTRUCTIONS INSTALLATION INSTALLATION OF OUTDOOR UNIT CONNECTING PIPES Preparation of Piping Connection of piping - Outdoor Forming the piping WIRING CONNECTION Electrical Wiring Connecting Cables between Indoor Unit and Outdoor Unit Connecting the cable to Outdoor Unit LEAKAGE TEST AND EVACUATION Preparation...

  • Page 17: Installation

    INSTALLATION INSTALLATION Installation Tools Figure Name Figure Name Screw driver Multi-meter Electric drill Hexagonal wrench Measuring tape, Knife Ammeter Hole core drill Gas-leak detector Thermometer, Spanner Level Torque wrench Flaring tool set more than 30cm more than 30cm...

  • Page 18: Installation Of Outdoor Unit

    INSTALLATION OF OUTDOOR UNIT INSTALLATION OF OUTDOOR UNIT CAUTION You need to select adequate installation location considering the following conditions, and make sure to acquire the consent of the Be very careful while carrying the user. product. • Do not have only one person carry Installation Places product if it is more than 20 kg.
  • Page 19 Capacity (kW) 2.5 / 3.5 7 / 8.5 10 / 12.5 / 14 / 15...
  • Page 20 INSTALLATION MANUAL Minimum floor area (for R32) - The appliance shall be installed, operated and stored in a room with a floor area larger than the minimum area. - Use the graph of table to determine the minimum area. Amin (m 2500 Floor standing 2000...
  • Page 21 INSTALLATION OF OUTDOOR UNIT ・ Synchro Operation Install the branch pipe so that pipe length and difference between high and low will not exceed below Spec. [Unit : m] Branch Pipe Length & Height Spec(MAX.) Total(L1+L2+L3+L4+L5) Main Pipe(L1) Branch Pipe (L2+L3+L4+L5) Each Indoor-Outdoor (H1) Remote...
  • Page 22 INSTALLATION OF OUTDOOR UNIT Synchro Combination table Possible combination of indoor units Synchro Trio Quartet IDU : INDOOR UNIT ODU : OUTDOOR UNIT BD : BRANACH DISTRIBUTOR UNIT REMO : WIRED REMOTE REMO REMO REMO CONTROLLER Capacity (kW) Cassette Duct Cassette Duct Cassette...
  • Page 23 INSTALLATION OF OUTDOOR UNIT Outdoor Unit PCB Setting Procedure For Simultaneous Operation System DIP_SW Setting Set the DIP_SW as below Table (Ⓐ) Auto Addressing Method Addressing work assigns address to each indoor unit. When firstly installing product or replacing the indoor unit PCB. Auto Addressing work should be done for simultaneous operation.

  • Page 24: Connecting Pipes

    CONNECTING PIPES CONNECTING PIPES Preparation of Piping - Main cause of gas leakage is defect in flaring Copper Slanted Uneven Rough work. Carry out correct flaring work in the tube 90° following procedure. - Use the de-oxidised copper as piping materials to install.

  • Page 25: Connection Of Piping - Outdoor

    CONNECTING PIPES Connection of piping - Outdoor Preventing foreign objects from entering (Figure 2) - Align the center of the piping and sufficiently - Plug the pipe through-holes with putty or tighten the flare nut by hand. insulation material(procured locally)to stop up - Finally, tighten the flare nut with torque all gaps, as shown in the figure 2.

  • Page 26: Forming The Piping

    CONNECTING PIPES Forming the piping In cases where the Outdoor unit is installed above the Indoor unit perform the following. Form the piping by wrapping the connecting Tape the piping and connecting cable from portion of the indoor unit with insulation down to up.

  • Page 27: Wiring Connection

    WIRING CONNECTION WIRING CONNECTION Electrical Wiring ELCB Perform the electrical wiring work according Main power source to the electrical wiring connection. Switch box - All wiring must comply with local Outdoor requirements. Indoor - Select a power source that is capable of supplying the current required by the air conditioner.
  • Page 28 WIRING CONNECTION Terminals on the indoor unit 4 1(L) 2(N) 3 1(L) 2(N) 3 CN-REMO Simultaneous Terminals on the indoor unit 3 1(L) 2(N) 3 1(L) 2(N) 3 CN-REMO Operation Unit 2,3,4 CN-REMO Terminals on the indoor unit 2 1(L) 2(N) 3 1(L) 2(N) 3...
  • Page 29 WIRING CONNECTION Precautions when laying power wiring Use round pressure terminals for connections to the power terminal block. Power wire Round pressure terminal When none are available, follow the instructions below. - Do not connect wiring of different thicknesses to the power terminal block. (Slack in the power wiring may cause abnormal heat.) - When connecting wiring which is the same thickness, do as shown in the figure below.

  • Page 30: Connecting The Cable To Outdoor Unit

    WIRING CONNECTION Connecting the cable to Outdoor Unit Remove the side panel for wiring connection. Use the cord clamp to fix the cord. Earthing work - Case 1 : Terminal block of Outdoor Unit have mark. Connect the cable of diameter 1.6 mm or more to the earthing terminal provided in the control box and do earthing.

  • Page 31: Leakage Test And Evacuation

    LEAKAGE TEST AND EVACUATION LEAKAGE TEST AND EVACUATION Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. - Pressure in the system rises. - Operating current rises. - Cooling (or heating) efficiency drops. - Moisture in the refrigerant circuit may freeze and block capillary tubing. - Water may lead to corrosion of parts in the refrigeration system.

  • Page 32: Evacuation

    LEAKAGE TEST AND EVACUATION Indoor unit Do a leakage test of all joints of the tubing (both Indoor unit and outdoor unit) and Outdoor unit both gas and liquid side service valves. Bubbles indicate a leak. Be sure to wipe off the soap with a clean cloth.

  • Page 33: Test Running

    TEST RUNNING TEST RUNNING Precautions In Test Running - The initial power supply must provide at least 90 % of the rated voltage. Otherwise, the air conditioner should not be operated. CAUTION • For test run, carry out the cooling operation firstly even during heating season. If heating operation is carried out firstly, it leads to the trouble of compressor.
  • Page 34 TEST RUNNING CAUTION After the confirmation of the above conditions, prepare the wiring as follows: 1 Never fail to have an individual power specialized for the air conditioner. As for the method of wiring, be guided by the circuit diagram pasted on the inside of control box cover.

  • Page 35: Installation Pi485

    INSTALLATION PI485 INSTALLATION PI485 Fix the PI485 PCB as shown in below images. For detailed installation method refer to PI485 Installation Manual. 2.5 / 3.5 kW 5 kW 7 / 8.5 kW 10 / 12.5 / 14 / 15 kW...

  • Page 36: Function

    FUNCTION FUNCTION DIP S/W Setting If you set the DIP Switch when power is on, the change in setting is not applicable. The changing setting is enabled only when Power is reset. DIP Switch Function Normal Operation (No Function) Pump Down Saving Power Consumption (Step 1) Saving Power Consumption (Step 2) Mode Lock (Cooling)
  • Page 37 FUNCTION DIP Switch Function 1 2 3 4 5 6 Synchro_Duo Synchro_Trio Synchro_Quartet WARNING When you set the DIP switch, you should turn off the circuit breaker or shut the power source of the product down. CAUTION • Unless the applicable DIP switch is set properly, the product may not work. •...

  • Page 38: Pump Down

    FUNCTION Pump Down Setting Procedure Set the DIP Switch as follow after shutting the power source down. 5 / 7 / 8.5 kW 10 / 12.5 / 14 / 15 kW Reset the power. Red LED and Green LED of PCB lights during work. (The indoor unit is operated by force.) If operation is done, Red LED will be turned off.

  • Page 39: Saving Power Consumption

    FUNCTION Saving Power Consumption Saving Power Consumption operation is the function which enables efficient operation by lowering the maximum power consumption value. Power consumption Normal and current Time Setting Procedure Set the DIP Switch as follow after shutting the power source down. 5 / 7 / 8.5 kW 5 / 7 / 8.5 kW 10 / 12.5 / 14 / 15 kW...

  • Page 40: Night Quiet Mode

    FUNCTION 5 / 7 / 8.5 kW 5 / 7 / 8.5 kW 10 / 12.5 / 14 / 15 kW 10 / 12.5 / 14 / 15 kW Saving Power Consumption (step 2) Saving Power Consumption (step 2) + Mode Lock (Cooling) + Mode Lock (Heating) Night Quiet Mode Night Quiet Mode operation lowers the noise level of the outdoor unit by changing the...

  • Page 41: Mode Lock

    FUNCTION Night Quiet Mode with Mode Lock. 5 / 7 / 8.5 kW 5 / 7 / 8.5 kW 10 / 12.5 / 14 / 15 kW 10 / 12.5 / 14 / 15 kW Mode Lock (Cooling) Mode Lock (Cooling) + Night Quiet Mode (step 1) + Night Quiet Mode (step 2) CAUTION...
  • Page 42 FUNCTION Mode Lock with Night Quiet Mode 5 / 7 / 8.5 kW 5 / 7 / 8.5 kW 10 / 12.5 / 14 / 15 kW 10 / 12.5 / 14 / 15 kW Mode Lock (Cooling) Mode Lock (Cooling) + Night Quiet Mode (step 1) + Night Quiet Mode (step 2) Saving Power Consumption with Mode Lock.

  • Page 43: Installation Guide At The Seaside

    INSTALLATION GUIDE AT THE SEASIDE INSTALLATION GUIDE In case, to install the outdoor unit on the seaside, set up a windbreak not to be exposed to the sea wind AT THE SEASIDE CAUTION Windbreak • Air conditioners should not be installed Sea wind in areas where corrosive gases, such as acid or alkaline gas, are produced.

  • Page 44: Seasonal Wind And Cautions In Winter

    SEASONAL WIND AND CAUTIONS IN WINTER SEASONAL WIND AND CAUTIONS IN WINTER - Sufficient measures are required in a snow area or severe cold area in winter so that product can operate well. - Get ready for seasonal wind or snow in winter even in other areas.

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