LG UHXM120BA1 Installation Manual
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LG UHXM120BA1 Installation Manual

LG UHXM120BA1 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.
MULTI
MFL67452306
Rev.00_032119
Copyright © 2013 - 2019 LG Electronics Inc. All Rights Reserved.
www.lg.com

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Summary of Contents for LG UHXM120BA1

  • 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. MULTI www.lg.com MFL67452306 Copyright © 2013 - 2019 LG Electronics Inc. All Rights Reserved. Rev.00_032119...
  • Page 2 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 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.
  • Page 4 IMPORTANT SAFETY INSTRUCTIONS • Safely dispose off the packing materials. Like screws, nails, batteries, broken things etc after installation or svc and then tear away and throw away the plastic packaging bags. Children may play with them and cause injury. •...

  • Page 5: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS • Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant levels may cause failure of product. • Please install safely at a place that can sufficiently endure the weight of the product. (If the strength is not sufficient, the product may fall and cause injury.) Operation •...

  • Page 6: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS TIPS FOR SAVING ENERGY IMPORTANT SAFETY INSTRUCTIONS INSTALLATION INSTALLATION OF INDOOR, OUTDOOR UNIT Select the best location Fixing Installation Plate Piping length and elevation Refrigerant charge Preparing work for Installation (ART COOL Type Only) Sticking the installation guide map and fixing Indoor unit (ART COOL Type Only) Drill a hole in the wall INSTALLATION OF WIRED REMOTE CONTROLLER...

  • Page 7: Installation

    INSTALLATION INSTALLATION Installation Parts Installation plate Type "B" screws Type "A" screw (6 EA) Type "A" screw (8 EA) Type "A" screw (7 EA) Type "A" screw and plastic anchors Holder Remote Control Installation Tools Figure Name Figure Name Screw driver Multi-meter Electric drill Hexagonal wrench...

  • Page 8: Installation Of Indoor, Outdoor Unit

    INSTALLATION OF INDOOR, OUTDOOR UNIT INSTALLATION OF INDOOR, OUTDOOR UNIT Read completely, then follow step by step. Outdoor unit You need to select adequate installation location considering the following conditions, and make • If an awning is built over the unit to prevent sure to acquire the consent of the user.

  • Page 9: Fixing Installation Plate

    INSTALLATION OF INDOOR, OUTDOOR UNIT Fixing Installation Plate <Type 4> Installation Plate The wall you select should be strong and solid enough to prevent vibration Mount the installation plate on the wall Type “A” with type "A" screws. If mounting the unit on a concrete wall, use anchor bolts.

  • Page 10: Piping Length And Elevation

    INSTALLATION OF INDOOR, OUTDOOR UNIT Piping length and elevation Multiple Piping Models (Unit: m) Max Elevation In - In Elevation Phase Capacity(kBtu/h) Total Length Max Length(A/B) (h1) (h2) 1 Ø Distributor type Models (Unit: m) Capacity Total Max Main Pipe Total Branch Max Branch Max Elevation...

  • Page 11: Refrigerant Charge

    INSTALLATION OF INDOOR, OUTDOOR UNIT Refrigerant charge The calculation of the additional charge should be taken in account for the length of extra pipe. Multiple Piping Models (Unit: m) Standard Max Piping for Max total Piping Additional Phase Capacity(kBtu/h) Length(m) one room(m) Length Charge(g/m)

  • Page 12: Preparing Work For Installation (Art Cool Type Only)

    INSTALLATION OF INDOOR, OUTDOOR UNIT Preparing work for Installation (ART COOL Type Only) Open panel front First, push the front panel backward and lift it up to remove the two screws. The moment of lifting the both lower parts of panel front, you can hear sound this panel came out, In this time panel front is separated After pull down this panel a bit, and separate connecting wire with product.

  • Page 13: Sticking The Installation Guide Map And Fixing Indoor Unit (Art Cool Type Only)

    INSTALLATION OF INDOOR, OUTDOOR UNIT Sticking the installation guide map and fixing Indoor unit (ART COOL Type Only) Put an Installation Guide Map on the desired surface. INSTALLATION GUIDE MAP Make a hole with diameter of 6 mm and depth of 30-35 mm when piercing a screw point. I A T Drive the four plastic anchors into drilled points.

  • Page 14: Drill A Hole In The Wall

    INSTALLATION OF INDOOR, OUTDOOR UNIT Drill the piercing part for connecting pipe as diameter Ø 65 mm. (In case of piercing rear surface) Refer to No. 5 on this page when making a hole in the wall. First, Drive the two points of the upper parts by screws.(Leave 10 mm for hanging product) T I O Drive the lower parts after facing the hole of product with plastic anchors, and fix completely the upper screws.

  • Page 15: Installation Of Wired Remote Controller

    INSTALLATION OF WIRED REMOTE CONTROLLER INSTALLATION OF WIRED REMOTE CONTROLLER Please fix tightly using provided screw after placing remote controller setup board on the place where you like to setup. - Please set it up not to bend because poor setup could take place if setup board bends. Please set up remote controller board fit to the reclamation box if there is a reclamation box.
  • Page 16 INSTALLATION OF WIRED REMOTE CONTROLLER Please connect indoor unit and remote controller using connection cable. Please check if connector is normally connected. Indoor Unit side Connecting cable Please use extension cable if the distance between wired remote controller and indoor unit is more than 10 m.

  • Page 17: Wired Remote Controller Installation

    INSTALLATION OF WIRED REMOTE CONTROLLER Wired remote controller installation - Since the room temperature sensor is in the remote controller, the remote controller box should be installed in a place away from direct sunlight, high humidity and direct supply of cold air to maintain proper space temperature.

  • Page 18: Flaring Work And Connection Of Piping

    FLARING WORK AND CONNECTION OF PIPING FLARING WORK AND CONNECTION OF PIPING Flaring work Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure. Cut the pipes and the cable - Use the piping kit accessory or the pipes purchased locally.

  • Page 19: Connection Of Piping - Indoor

    FLARING WORK AND CONNECTION OF PIPING Check Smooth all round - Compare the flared work with figure below. Inside is shining without scratches. - If flare is noted to be defective, cut off the flared section and do flaring work again. = Improper flaring = Inclined Surface...
  • Page 20 FLARING WORK AND CONNECTION OF PIPING Indoor unit installation Hook the indoor unit onto the upper portion of the installation plate.(Engage the two hooks of the rear top of the indoor unit with the upper Connecting edge of the installation plate.) Ensure that the hooks are properly seated on the installation Drain hose plate by moving it left and right.

  • Page 21: Connection Of Piping - Outdoor

    FLARING WORK AND CONNECTION OF PIPING - Bundle the piping and drain hose together by Wrap with vinyl tape wrapping them with vinyl tape over the Pipe range within which they fit into the rear piping housing section. Vinyl tape(wide) Drain hose CAUTION Installation Information (For right piping) For right piping, follow the instruction below.
  • Page 22 FLARING WORK AND CONNECTION OF PIPING - For the Distributor Type Models the installation piping is connectable in four directions.(refer to figure 1) Continuous - When connecting in a downward direction, knock out the knockout hole of the base pan. (refer to figure 2) Preventing foreign objects from entering (Figure 3)
  • Page 23 FLARING WORK AND CONNECTION OF PIPING Branch [unit:mm] Model Gas Pipe Liquid Pipe Ø 19.05 Ø 19.05 Ø 9.52 Ø 9.52 PMBL5620 Ø 9.52 Ø 19.05 PMBL1203F0 Ø 9.52 Ø 9.52 Ø 19.05 Y branch Ⓐ To Outdoor Unit Ⓑ To BD Unit Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing upwards...

  • Page 24: Installation

    FLARING WORK AND CONNECTION OF PIPING Installation - This unit may be installed suspended from the ceiling or mounted on the wall. - This unit may only be installed horizontally , as shown in the diagram below.(Side B is facing up) However, it may be freely installed in any direction forward or back, and to the sides.

  • Page 25: Installation Of The Main Unit

    FLARING WORK AND CONNECTION OF PIPING Installation of The Main Unit Install a hexagon nut and a flat washer (locally-procured)to the hanging bolt as shown in the figure in the left, and lift the (1) Ceiling-suspended type main unit to hang on the hanger metal. After checking with a level that the unit is level, tighten the hexagon nut.

  • Page 26: Connecting The Cable Between Indoor Unit And Outdoor Unit

    CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT Connect the cable to the Indoor unit Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection.
  • Page 27 CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT A5UW40GFA0 A7UW40GFA0 A8UW48GFA0/A9UW56GFA0 CAUTION Main power source Provide a circuit breaker between power source and the unit as shown below. Circuit Breaker Conditioner Use a circuit breaker or time delay fuse. CAUTION The power cord connected to the outdoor unit should be complied with the following specifications (Cable type approved by HAR or SAA).

  • Page 28: Connect The Cable To The Outdoor Unit

    CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT Connect the cable to the Outdoor unit 1 Remove the cover control from the unit by Outdoor unit loosening the screw. Terminal block Connect the wires to the terminals on the control board individually as the following.
  • Page 29 CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT 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: Connection Of Wiring

    CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT Connection of Wiring Remove the control cover. Loosen the two screws, and slide the cover in the direction - Connect refrigerant pipes and connection of the arrow. wires to the appropriate ports maked with matching alphabets (A, B and C) on this unit.

  • Page 31: Checking The Drainage And Forming The Pipings

    CHECKING THE DRAINAGE AND FORMING THE PIPINGS CHECKING THE DRAINAGE AND FORMING THE PIPINGS Checking the Drainage Do not make drain piping. To check the drainage. Pour a glass of water on the evaporator. Do not raise Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit.

  • Page 32: Forming The Piping

    CHECKING THE DRAINAGE AND FORMING THE PIPINGS 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 33: Air Purging And Evacuation

    AIR PURGING AND EVACUATION AIR PURGING AND EVACUATION CAUTION The air and moisture remaining in the refrigerant system have undesirable effects as indicated below. To avoid nitrogen entering the refrigerant - Pressure in the system rises. system in a liquid state, the top of the cylinder must be higher than its bottom - Operating current rises.

  • Page 34: Evacuation

    AIR PURGING AND EVACUATION WARNING - Replace the valve caps at both gas and liquid side service valves and fasten them tight. Use a vacuum pump or Inert (nitrogen) This completes air purging with a vacuum pump. gas when doing leakage test or air purge. The air conditioner is now ready to test run.

  • Page 35: Panel Front Assembly (Art Cool Type Only)

    PANEL FRONT ASSEMBLY (ART COOL TYPE ONLY) PANEL FRONT ASSEMBLY (ART COOL TYPE ONLY) First, Check the side cover assembly Suspend hook of front panel in the groove exactly, Fix power cord in the bottom after contract lower of 2 screws. groove of cover side left.

  • Page 36: Installation Pi485

    INSTALLATION PI485 INSTALLATION PI485 Fix the PI485 PCB as shown in Fig. Detailed installation method refer to PI485 Installation Manual. A3UW18GFA0 A4UW24GFA0 / A5UW30GFA0 This label is should be applied in the location This label is should be applied in the location where where LGAP(Sub PCB for Central Controller is...

  • Page 37: Test Running

    TEST RUNNING TEST RUNNING - Check that all tubing and wiring have been - For reference, the gas side pressure of properly connected. optimum condition is as below.(Cooling) - Check that the gas and liquid side service valves are fully open. Outside The pressure of Refrigerant...

  • Page 38: 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) Forced Cooling Operation Wiring Error Check Saving Power Consumption (Step 1) Saving Power Consumption (Step 2)

  • Page 39: Forced Cooling Operation

    FUNCTION 18 (1 Ø) kBtu/h 40 / 48 / 56 (1 Ø) kBtu/h Forced Cooling Operation Adding the refrigerant in winter. DIP-SW Setting Procedure Set the DIP Switch as follow after shutting the power source down. 24 / 30 (1 Ø) kBtu/h Reset the power.

  • Page 40: Wiring Error Check

    FUNCTION CAUTION Wiring Error Check You can check whether or not the wiring is correct. • If Indoor unit doesn’t communicate to outdoor Unit, function could not be Setting Procedure operated correctly. Set the DIP Switch as follow after shutting •...

  • Page 41: Night Quiet Mode

    FUNCTION Saving Power Consumption Current level. Phase 1 Ø Model 18 k 24 k 30 k 40 k 48 k 56 k Step1(A) Step2(A) Saving Power Consumption with Mode Lock. Saving Power Saving Power Consumption (step 1) Consumption (step 1) + Mode Lock (Cooling) + Mode Lock (Heating) Saving Power...

  • Page 42: Mode Lock

    FUNCTION Mode Lock Setting Procedure Set the DIP Switch as follow after shutting the power source down. Only Cooling Mode Only Heating Mode Reset the power. Mode Lock with Night Quiet Mode Mode Lock (Cooling) Mode Lock (Cooling) + Night Quiet Mode + Night Quiet Mode (step 1) (step 2)

  • Page 43: Pcb Display(18 K Model Only)

    FUNCTION PCB Display(18 k Model Only) It is useful to check the cycle data without LGMV. Operating Method Whenever you push the Tact Switch, the cycle information will be shown as below. h After 1 page is displayed, subsequently 2 page is displayed. Display Tact S/W Item...

  • Page 44: Max Combination Capacity

    MAX COMBINATION CAPACITY MAX COMBINATION CAPACITY Multi Piping Type Capacity Combination Indoor Capacity Max Combination Capacity Max Room No. (kBtu/h) (kBtu/h) (kBtu/h) 7, 9, 12, 18 7, 9, 12, 18, 24 7, 9, 12, 18, 24 7, 9, 12, 18, 24 Distributor Type Capacity Combination Indoor Capacity...

  • Page 45: Installation Guide At The Seaside

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

  • Page 46: 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 be operated well. - Get ready for seasonal wind or snow in winter even in other areas. - Install a suction and discharge duct not to let in snow or rain.

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