ENGLISH FRANÇAIS ESPAÑOL 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 Type MFL68280103 Rev.06_072821 www.lghvac.com www.lg.com Copyright © 2015 - 2021 LG Electronics Inc. All Rights Reserved.
FLEX MULTI SPLIT INSTALLATION INSTRUCTIONS ! WARNING Do not turn on the breaker or power under condition that front panel, cabinet, top cover, control box cover are removed or opened. Otherwise, it may cause fire, electric shock, explosionor death.
TABLE OF CONTENTS 4 5 8 INSTALLATION PARTS PROVIDED SAFETY INSTRUCTIONS INSTALLATION OF INDOOR, OUTDOOR UNIT 8 10 11 12 Select the best location Seaside Applications and Installation Seasonal Wind And Cautions In Winter Piping length and elevation 14 INSTALLATION 14 18 19 19 20 21 21 21 22 24 26 Connecting the piping How To Fix Wiring Connection Conduit connection Ceiling dimension and hanging bolt location How to Fix Wiring Connection Conduit connection Installation of Wired Remote Controller(Optio
Installation Parts Provided Installation Parts Provided [Wall mounted / ART COOL Mirror] Type 1 Type 2 Type 3 Type 4 Installation plate Installation plate Installation plate Installation plate Type "B" screw Type "B" screw Type "B" screw Type "C" screw Type "B" screw Type "C" screw Type "A" screw Type "A" screw Type “A” screw Type “A” screw Remote control holder Remote control holder Remote control holder Remote control holder [Ceiling Concealed Duct Type] Name Clamp metal Insulation
Safety Instructions The following safety guidelines are intended to prevent unforeseen risks or damage from unsafe or incorrect operation of the appliance. The guidelines are separated into ‘WARNING’ and ‘CAUTION’ as described below. ! This symbol is displayed to indicate matters and operations that can cause risk. Read the part with this symbol carefully and follow the instructions in order to avoid risk.
Safety Instructions • Use caution when unpacking and installing. - Sharp edges may cause injury. • Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and Do not use Flammable gases. Otherwise, it may cause fire or explosion. - There is the risk of death, injury, fire or explosion. Operation • Do not share the outlet with other appliances. - It will cause an electric shock or a fire due to heat generation. • Do not use the damaged power cord.
Safety Instructions CAUTION Installation • Install the drain hose to ensure that drain can be securely done. - Otherwise, it may cause water leakage. • Install the product so that the noise or hot wind from the outdoor unit may not cause any damage to the neighbors. - Otherwise, it may cause dispute with the neighbors. • Always inspect gas leakage after the installation and repair of product. - Otherwise, it may cause the failure of product. • Keep level parallel in installing the product.
Installation of Indoor, Outdoor Unit Installation of Indoor, Outdoor Unit Read completely, then follow step by step. Select the best location Indoor unit 1. Do not have any heat or steam near the unit. 2. Select a place where there are no obstacles in front of the unit. 3. Make sure that condensation drainage can be conveniently routed away. 4. Do not install near a doorway. 5.
Installation of Indoor, Outdoor Unit [Vertical Air Handling Unit] ENGLISH [Console] More than 350 (13-25/32) More than 300 (11-13/16) More than 300 (11-13/16) More than 300 (11-13/16) More than 600 (23-5/8) clearance from access panels for Service More than 250 (9-27/32) More than 250 (9-27/32) 250 (9-27/32) or below from the Floor More than 350 (13-25/32) Unit: mm(inch) Outdoor unit 1.
Installation of Indoor, Outdoor Unit Seaside Applications and Installation ! CAUTION 1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced. 2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunction or inefficient performance. 3.
Installation of Indoor, Outdoor Unit To ensure the outdoor unit operates properly, certain measures are required in locations where there is a possibility of heavy snowfall or severe wind chill or cold: 1. Prepare for severe winter wind chills and heavy snowfall, even in areas of the country where these are unusual phenomena. 2. Position the outdoor unit so that its airflow fans are not buried by direct, heavy snowfall. If snow piles up and blocks the airflow, the system will malfunction. 3.
Installation of Indoor, Outdoor Unit Piping length and elevation Multi Piping Type Outdoor Unit Capacity (kBtu/h class) 18 24 24(RED) 30 36 Max total length of all pipes (A+B)/(A+B+C)/ (A+B+C+D) 50(164) 70(230) 75(246) 75(246) 75(246) Max length of each pipe (A/B/C/D) Min length of each pipe (A/B/C/D) 25(82) 25(82) 25(82) 25(82) 25(82) 3(10) 3(10) 3(10) 3(10) 3(10) Unit : m(ft) Max Elevation Max elevation Max.
Installation of Indoor, Outdoor Unit Unit : m(ft) Max Max Min length of Max Elevation Outdoor Unit Max total length Max length Max length Max length each pipe Between each Elevation Combination Capacity of all pipes of of indoor unit and Between of indoor of each (Main / Branch (kBtu/h (Main + Branch Main pipe outdoor unit indoor unit (kBtu/h Branch pipe Branch class) pipes) (A+B+C) pipes (h1) (h2) class) pipes) 48 145(476) 55(180) 90(295) 15(49) 3(10) 30(98) 15(49) 65 54 145(476) 55(180) 90(295) 15(49) 3
Installation Installation [Wall mounted / ART COOL Mirror] Connecting the piping ▶ Standard / Artcool Mirror Type 1. Prepare the indoor unit's piping and drain hose for installation through the wall. 2. Remove the plastic tubing retainer(see the illustration on the right) and pull the tubing and drain hose away from chassis. 3. Route the indoor tubing and the drain hose to the required piping hole position. 4. Insert the piping, drain hose, and the connecting cable into the piping hole. 5.
Installation ENGLISH ▶ Standard Libero / Artcool Libero Type 1. Pull the screw cap at the bottom of the indoor unit 2. Remove the chassis cover from the unit by loosing screws Chassis cover Indoor unit back side view 3. Pull back the tubing holder. Pipe Port 4. Remove pipe port cover and positioning the tubing Left Right Tubing holder Backwards 5. Indoor unit installation 1) Hook the indoor unit onto the upper portion of the installation plate.
Installation Connecting the piping to the indoor unit and drain hose to drain pipe. 1. Align the center of the pipes and sufficiently tighten the flare nut by hand. Indoor unit tubing Flare nut Pipes 2. Tighten the flare nut with a wrench. Open-end wrench (fixed) Outside diameter mm inch Ø 6.35 1/4 Ø 9.52 3/8 Ø 12.7 1/2 Ø 15.88 5/8 Ø 19.05 3/4 N.m 14~18 34~42 49~61 69~82 100~120 Torque kgf.m 1.4~1.8 3.5~4.3 5.0~6.2 7.0~8.4 10.0~12.2 lbf.ft 10~13 25~31 36~45 51~60 73~88 3.
Installation Plastic bands Insulation material Indoor unit pipe Connection pipe Wrap with vinyl tape Vinyl tape (wide) Pipe Vinyl tape(narrow) 3. Bundle the piping and drain hose together by wrapping them with vinyl tape over the range within which they fit into the rear piping housing section. Vinyl tape(wide) Drain hose Reroute the pipings and the drain hose across the back of the chassis. Finishing the indoor unit installation # Standard / Artcool Mirror Type 1. Remove the spacer. 2.
Installation Installation of filters 1) Detach two attached tapes from the plasma filter. Plasma Filter How To Fix The wall you select should be strong and solid enough to prevent vibration 1. Mount the installation plate on the wall with type "A" screws. If mounting the unit on a concrete wall, use anchor bolts. • Mount the installation plate horizontally by aligning the centerline using a level. 2. Measure the wall and mark the centerline.
Installation ENGLISH Wiring Connection 1. 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 indoor unit respectively. Terminal Block in Indoor 1(L1) 2(L2) 3 4 Connecting cable Connected to Outdoor Unit 2. Attach the Grille onto the cabinet.
Installation [Ceiling Cassette Type] Ceiling dimension and hanging bolt location • The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions. Ceiling Ceiling board Level gauge • Select and mark the position for fixing bolts and piping hole. • Decide the position for fixing bolts slightly tilted to the drain direction after considering the direction of drain hose. • Drill the hole for anchor bolt on the wall.
Installation 150 mm (5-7/8 inch) Ceiling Keep the length of the bolt from the bracket to 40 mm(1-9/16 inch) Hanging bolt (W3/8 or M10) Nut (W3/8 or M10) Flat washer for M10 (accessory) Ceiling board Spring washer (M10) ① Hanging Bolt - W 3/8 or M10 ② Nut - W 3/8 or M10 ! Ceiling board Keep the length of 31~34 mm(1.22~1.34 inch) between the air conditioner bottom surface and the ceiling surface Flat washer for M10 (accessory) Nut (W3/8 or M10) • The following parts are local purchasing.
Installation Installation of Wired Remote Controller(Optional) 1. Properly secure the mounting plate in a preferred location using provided screws. - Avoid bending the mounting plate by not over-tightening the provided screws. Please set up remote controller board fit to the reclamation box if there is a reclamation box. - Ensure that the mounting plate and controller are securely attached to the wall to prevent shaking after the installation. 2.
Installation - Please securely connect the remote controller to the mounting plate. - Before assembly with the mounting plate, arrange the Cable not to interfere with circuit parts. The remote controller can be separated from the mounting plate by inserting a screw driver into the slots located at the base of the controller. Wall Side Wall Side Wall Side Wall Side - There are two slots for separating the controller from the mounting plate.
Installation Installation of Decorative Panel The decorative panel has its installation direction. Before installing the decorative panel, always remove the paper template. 1. Remove the packing and take out air inlet grille from front panel. Front grille 2. Remove the Corner covers of the panel. Coner cover 3. Fit the panel on the unit by inserting hooks as shown in picture. Hook clip Hook 4. Insert two screws on diagonal corners of panel. Do not tighten the bolts completely.
Installation ENGLISH 5. Fit the corner covers. 6. Open two screws of control panel cover. Screw 7. Connect one display connector and two vane control connectors of front panel to indoor unit PCB. The position marking on PCB is as: Display connector : CN-DISPLAY Vane control connector: CN-VANE 1,2 CN-VANE 1,2 CN-DISPLAY 8. Close the cover for control box. 9. Install the air inlet grille and Filter on the panel.
Installation ! CAUTION Install certainly the decorative panel. Cool air leakage causes sweating. ⇨ Water drops fall. Good example Bad example Air conditioner unit Air conditioner unit Air Cool air leakage (no good) Ceiling board Ceiling board Decorative panel Decorative panel Fit the insulator (this part) and be careful for cool air leakage HEAT INSULATION 1. Use the heat insulation material for the refrigerant piping which has an excellent heatresistance [over 120 °C(248 °F)]. 2.
Installation • Drain piping must have down-slope (1/50 to 1/100): be sure not to provide up-and-down slope to prevent reversal flow. • During drain piping connection, be careful not to exert extra force on the drain port on the indoor unit. • The outside diameter of the drain connection on the indoor unit is 32 mm(1 1/4 inch).
Installation Attention 1. Possible drain-head height is up to 700 mm (27 9/16 inch). So, it must be installed below 700 mm(27 9/16 inch). 1/50~1/100 MAX 700 mm (27 9/16 inch) 2. Keep the drain hose downward up to 1/50~1/100 inclination. Prevent any upward flow or reverse flow in any part. 3. 5 mm(3/16 inch) or thicker formed thermal insulator is provided for the drain pipe. Thermal insulator (Local supply) Drain pipe (Local supply) Unit Elbow Drain pump 4. Upward routing is not allowed. Wall 5.
Flaring Work and Connection of Piping Flaring work Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure. Copper tube Slanted Uneven Rough 90° 1) Cut the pipes and the cable. n Use the accessory piping kit or the pipes purchased locally. n Measure the distance between the indoor and the outdoor unit. n Cut the pipes a little longer than measured distance. n Cut the cable 1.5 m(4.9 ft) longer than the pipe length.
Flaring Work and Connection of Piping Connection of piping - Outdoor Align the center of the piping and sufficiently tighten the flare nut by hand. Connecting pipe order 1) ROOM A~C gas side pipe 2) ROOM A~C liquid side pipe Ø 12.7(1/2 inch) Connector Finally, tighten the flare nut with torque wrench until the wrench clicks. • When tightening the flare nut with torque wrench ensure the direction for tightening follows the arrow on the wrench. Outside diameter mm inch N.m Torque kgf.m lbf.ft Ø 6.
Flaring Work and Connection of Piping ENGLISH • For the units with capacity more than 48 kBtu/h, the installation piping is connectable in four directions.(refer to figure 1) • When connecting in a downward direction, knock out the knockout hole of the base pan. (refer to figure 2) Continuous → Torque wrench (250 mm ) Preventing foreign objects from entering (Figure3) • Plug the pipe through-holes with putty or insulation material(procured locally)to stop up all gaps,as shown in the figure 3.
Flaring Work and Connection of Piping Branch * For detailed dimensions, refer to the printed materials enclosed at the time of purchase the branch pipe. [unit: mm] Model Gas Pipe Liquid Pipe Ø 19.05 Ø 19.05 PMBL5620 Ø 9.52 Ø 9.52 Ø 9.52 Ø 19.05 Y branch A To Outdoor Unit B A B To BD Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.
Flaring Work and Connection of Piping • This unit may be installed suspended from the ceiling or mounted on the wall. • This unit may 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. • Be sure to leave a 23.6 inch square opening for service and inspection as shown in the diagram below, for both ceiling - suspended installation and wall-mounted installation.
Flaring Work and Connection of Piping Installation of The Main Unit NOTICE : • This unit has two different installation types: (1) Ceiling-suspended type and (2) wall-mounted type. • Choose the proper installation pattern according to the location of installation. • The installation location for printed wiring board can be changed. Follow the procedure specified in the "CONNECTING THE WIRING" section to change the location.
Connecting the Cable between Indoor Unit, Distributor 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. (Ensure that the color of the wires of the outdoor unit and the terminal No. are the same as those of the indoor unit.) The ground wire should be longer than the common wires. The circuit diagram is not subject to change without notice.
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit u Precautions when laying power and ground wiring Use round pressure terminals for connections to the power terminal block. When laying ground wiring, you must use round pressure terminals. Round pressure terminal Power wire(Ground wire) 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.
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit ! A room A B room B C room C WARNING Do not use tapped wires, stand wires, extension cords, or starbust connections, as they may cause overheating, electrical shock, or fire. CN-PWR Connection wire for indoor units (AWG 18-4) Connection wire for outdoor units (AWG 16-4) (1) Remove the control cover. Loosen the two screws, and slide the cover in the direction of the arrow.
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit Connect the cable to the Outdoor unit 1. Remove the control cover from the unit by loosening the screw. Connect the wires to the terminals on the control board individually as the following. 2. Secure the cable onto the control board with the Conduit hole holder (clamper). 3. Re-attach the cover control to the original position using the screws.
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit Indoor Unit Terminal Block Indoor Unit Terminal Block Indoor Unit Terminal Block Indoor Unit Terminal Block E Unit F Unit G Unit H Unit 1(L1) 2(L2) 1(L1) 2(L2) 3 L(L1) N(L2) S A Room 1(L1) 2(L2) 3 1(L1) 2(L2) L(L1) N(L2) S 3 1(L1) 2(L2) 3 L(L1) N(L2) S L(L1) N(L2) S C Room D Room B Room L(L1) N(L2) 3 1(L1) 2(L2) L(L1) N(L2) S 3 1(L1) 2(L2) L(L1) N(L2) S A Room B Room S 3 L(L1) N(L2) S 3 L(L1) N(L2) S
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit Connection method of the connecting cable(Example) (1) Remove the side panel and knockouts of conduit panel. (for low voltage line) (2) Pull out connection cable through conduit. (3) After conduit to the panel, fix nut to the opposite side of panel. (4) Pass the connection cable through the hole. (5) Properly connect the cable on the terminal block.
Checking the Drainage, Insulating the Pipe and Special Piping Applications Checking the drainage 1. Remove the Air Filter. 2. Check the drainage. • Spray one or two glasses of water upon the evaporator. • Ensure that water flows drain hose of indoor unit without any leakage. h The figure can be changed according to model.
Air Purging and Evacuation Air Purging and Evacuation Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5. Water may lead to corrosion of parts in the refrigeration system.
Air Purging and Evacuation 1. Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with tubing length and capacity of the pump. The following table shows the time required for evacuation.
Charging Charging n If installed total piping length is more than standard total length, additional refrigerant charging is necessary. Below standard total piping length, additional refrigerant charging is not required.
Charging Additional charge (oz) = ((Total Main piping Length - Main Standard Length) x 0.54 + (A Room Branch Length – Standard Length) x 0.22 + (B Room Branch Length – Standard Length) x 0.22 + (C Room Branch Length – Standard Length) x 0.22 +.. ) - CF(Correction Factor) x 3.53 h CF = Max. number of connectable indoor unit – Total number of connected indoor unit • Total main pipe(A+B+C)=98ft • Each branch pipe a = 33 ft b = 26 ft c = 16.
Installation PI485 Installation PI485 Fix the PI485 PCB as shown in Fig. Detailed installation method refer to PI485 Installation Manual. 18/24 kBtu/h 30/36 kBtu/h where This label is should be applied in the location installed. LGAP(Sub PCB for Central Controller is the LGAP.
Test Running ENGLISH Test Running - Check that all tubing and wiring have been properly connected. - Check that the gas and liquid side service valves are fully open. Prepare remote control Remove the battery cover by pulling it according to the arrow direction.Insert new batteries making sure that the (+) and (–) of battery are installed correctly. Reattach the cover by pushing it back vinto position. NOTICE Bolt : • Use 2 AAA(1.5 volt) batteries. Do not use rechargeable batteries.
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.
Function 18(1Ø) kBtu/h 30/36(1Ø) kBtu/h ENGLISH 18/24(1Ø) kBtu/h 24(1Ø) kBtu/h 5 SW1 5 5 DIP SW1 DIP SW1 48/54(1Ø) kBtu/h 60(1Ø) kBtu/h 36/42/48(1Ø, RED) kBtu/h 6 6 DIP_SW01D DIP_SW01D Forced Cooling Operation Adding the refrigerant in winter. Setting Procedure 1. Set the DIP Switch as follow after shutting the power source down. 5 1 2 3 4 5 6 2. Reset the power. 3. Check that the Red LED of PCB is on during work. (The indoor unit is operated by force.
Function Wiring Error Check You can check whether or not the wiring is correct. 5 Setting Procedure 1. Set the DIP Switch as follow after shutting the power source down. 1 2 3 4 5 2. Reset the power. 3. Check that the Re and Green LED of PCB are on during work. (The indoor unit is operated by force.) 4. If the wiring is correct, the Green LED will light up. If the wiring is wrong, display as below (Display only wrong connection.
Function Phase Model Step 1(A) Step 2(A) 1Ø 30/36 k 13 11 18/24 k 15 14 48/54/60 k 22 21 Saving Power Consumption with Mode Lock.
Function ! CAUTION • If comp frequency and fan speed are down, the cooling capacity may decrease accordingly. • This function is only available for Cooling Mode. • If you want to stop the Night Quiet Mode, Change the DIP Switch. • If operating indoor unit is set by the fan speed “Power”, Night Quiet Mode will be stopped until fan speed “Power” is changed. Mode Lock Setting Procedure 1. Set the DIP Switch as follow after shutting the power source down.
Function ENGLISH PCB Display 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 Example 1 page 2 page 1 time Low Pressure 890 kpa ‘LP’ ’ 89’ 2 time Hi Pressure 2 900 kpa ‘HP’ ‘290’ 3 time Discharge Temp. 85 °C ‘DS’ ’ 85’ 4 time Cond Out Temp. -10 °C ‘CS’ ‘-10’ 5 time Suction Temp.
Max Combination Capacity Max Combination Capacity Multi Piping Type Capacity (kBtu/h) 18 24 30 36 Combination Indoor Capacity (kBtu/h) 7,9,12,15 7,9,12,15,18,24 7,9,12,15,18,24 7,9,12,15,18,24 Max Room No. 2 3 4 4 Max Combination Capacity (kBtu/h) 24 33 40 48 Distributor Type Phase 1Ø 1Ø 1Ø 1Ø 1Ø 1Ø Capacity (kBtu/h) 48 54 60 36 (RED) 42 (RED) 48 (RED) Max Room No.
US 1. Please call the installing contractor of your product, as warranty service will be provided by them. 2. If you have service issues that have not been addressed by the contractor, please call 1-888-865-3026.
