Page 2 - WARNING
F L E X M U LT I S P L I T I N S TA L L AT I O N I N S T R U C T I O N S 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. WARNING ! SPECIAL WARNINGS !
Page 3 - ENGLISH; TABLE OF CONTENTS
Installation Manual 3 TABLE OF CONTENTS ENGLISH 4 INSTALLATION PARTS PROVIDED 5 SAFETY INSTRUCTIONS 8 INSTALLATION OF INDOOR, OUTDOOR UNIT 8 Select the best location 10 Seaside Applications and Installation 11 Seasonal Wind And Cautions In Winter 12 Piping length and elevation 14 INSTALLATION 14 Con...
Page 4 - The figure can be changed according to model.; Installation Parts Provided
4 Multi Air Conditioner Installation Parts Provided h The figure can be changed according to model. Installation Parts Provided [Wall mounted / ART COOL Mirror] [Ceiling Concealed Duct Type] [Ceiling Cassette Type] Type "A" screw Type "A" screw Type "B" screw Type "B"...
Page 5 - Safety Instructions; Installation; • Always perform grounding.
Installation Manual 5 Safety Instructions ENGLISH Safety Instructions Installation • Always perform grounding. - Otherwise, it may cause electrical shock. • Don’t use a power cord, a plug or a loose socket which is damaged. - Otherwise, it may cause a fire or electrical shock. • For installation of ...
Page 6 - Operation
6 Multi Air Conditioner 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 orexpl...
Page 7 - CAUTION
Installation Manual 7 Safety Instructions ENGLISH 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,...
Page 8 - Read completely, then follow step by step.; Indoor unit; Make sure that condensation drainage can be; Select the best location; Top view; Installation of Indoor, Outdoor Unit
8 Multi Air Conditioner Installation of Indoor, Outdoor Unit Read completely, then follow step by step. 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 a...
Page 9 - Outdoor unit; If an awning is built over the unit to prevent; Rooftop Installations:
Installation Manual 9 Installation of Indoor, Outdoor Unit ENGLISH Outdoor unit 1. If an awning is built over the unit to prevent direct sunlight or rain exposure, make surethat heat radiation from the condenser is notrestricted. 2. Ensure the unit is unobstructed, allow proper space on all sides ac...
Page 10 - Seaside Applications and Installation
10 Multi Air Conditioner Installation of Indoor, Outdoor Unit Seaside Applications and Installation 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)...
Page 11 - Seasonal Wind And Cautions In Winter; are unusual phenomena.
Installation Manual 11 Installation of Indoor, Outdoor Unit ENGLISH Seasonal Wind And Cautions In Winter To ensure the outdoor unit operates properly, certain measures are required in locations where thereis a possibility of heavy snowfall or severe wind chill or cold: 1. Prepare for severe winter w...
Page 12 - Multi Piping Type; Piping length and elevation; Pipe Diameter
12 Multi Air Conditioner Installation of Indoor, Outdoor Unit Multi Piping Type Piping length and elevation h2 h1 A B Multiple Piping Type Unit : m(ft) 18 50(164) 25(82) 3(10) 15(49) 7.5(25) 24 24 70(230) 25(82) 3(10) 15(49) 7.5(25) 33 24(RED) 75(246) 25(82) 3(10) 15(49) 7.5(25) 33 30 75(246) 25(82)...
Page 13 - Distributor Piping Type
Installation Manual 13 Installation of Indoor, Outdoor Unit Distributor Piping Type h1 C Branch Pipe Main Pipe Distributor Distributor A B h2 Unit : m(ft) Outdoor Unit Capacity (kBtu/h class) Max total length of all pipes (Main + Branch pipes) Max length of Main pipe (A+B+C) Max length of Branch pip...
Page 14 - Standard / Artcool Mirror Type; Connecting the piping
14 Multi Air Conditioner Installation ▶ 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 tubingand drain hose away from chassis. 3. Route the indo...
Page 15 - Standard Libero / Artcool Libero Type
Installation Manual 15 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 3. Pull back the tubing holder. 4. Remove pipe port cover and positioning the tubing Chassis cover Ri...
Page 16 - Align the center of the pipes and; Good case; • Bending the pipe from right to left may cause damage to the tubing.
16 Multi Air Conditioner Installation Connecting the piping to the indoor unitand drain hose to drain pipe. 1. Align the center of the pipes and sufficiently tighten the flare nut by hand. 2. Tighten the flare nut with a wrench. 3. Next, extend the indoor unit's drain hose. Then attach the drain pip...
Page 17 - Finishing the indoor unit installation
Installation Manual 17 Installation ENGLISH Wrap the insulation material around theconnecting portion. 1. Overlap the connection pipe insulation and the indoor unit pipe heat insulation material. Bindthem together with vinyl tape so that there is nogap. 2. Wrap the area which accommodates the rear p...
Page 18 - If mounting the unit on a concrete wall, use anchor bolts.; How To Fix; Installation of filters; ) Detach two attached tapes from the plasma
18 Multi Air Conditioner Installation The wall you select should be strong and solid enough to prevent vibration1. 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...
Page 19 - Conduit connection; Wiring Connection
Installation Manual 19 Installation ENGLISH 1. Connect the wires to the terminals on the control board individually according to theoutdoor unit connection. • Ensure that the color of the wires of outdoor unit and the terminal No. are the same asthose of indoor unit respectively. 2. Attach the Grill...
Page 20 - Ceiling dimension and hanging bolt location; to damage electric wires.
20 Multi Air Conditioner Installation [Ceiling Cassette Type] Ceiling dimension and hanging bolt location Level gauge Ceiling Ceiling board Unit: mm(inch) 585~660(23 1/16~26) (Ceiling Opening) 517(20 3/8) 461(18 5/32) 517(20 3/8) 585~660(23 1/16~26) (Ceiling Opening) 523(20 19/32) 570(22 15/32) Unit...
Page 21 - Terminal Block of Indoor Unit; conduit bracket to the indoor unit.
Installation Manual 21 Installation ENGLISH Set screw ofpaper model (4 pieces) Paper modelfor installation Ceiling board 150 mm (5-7/8 inch) Ceiling board Ceiling Flat washer for M10 (accessory) Keep the length of the bolt from the bracket to 40 mm(1-9/16 inch) Open the ceiling boardalong the outer ...
Page 22 - Installation of Wired Remote Controller(Optional); Can set up Wired remote controller cable into three directions.; controller cable guide groove.; Reclamation to the surface of the wall
22 Multi Air Conditioner Installation Installation of Wired Remote Controller(Optional) 1 2 3 2 3 <Wire guide grooves> 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 ...
Page 23 - Please fix remote controller upper part into the
Installation Manual 23 Installation ENGLISH Wall Side Wall Side Wall Side Wall Side <Connecting order> <Separating order> 3. Please fix remote controller upper part into the mounting plate attached to the surface of thewall, as the picture on the right, and then,connect with mounting pla...
Page 24 - Installation of Decorative Panel
24 Multi Air Conditioner 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. 2. Remove the Corner covers of th...
Page 25 - Open two screws of control panel cover.
Installation Manual 25 Installation ENGLISH 5. Fit the corner covers. 6. Open two screws of control panel cover. 7. Connect one display connector and two vane control connectors of front panel toindoor unit PCB.The position marking on PCB is as:Display connector : CN-DISPLAYVane control connector: C...
Page 26 - HEAT INSULATION; Precautions in high humidity; The drain hose should point downward for; Drain Piping
26 Multi Air Conditioner Installation CAUTION Install certainly the decorative panel. Cool air leakage causes sweating. ⇨ Water drops fall. ! Air conditionerunit Ceiling board Decorative panel Decorative panel Fit the insulator (this part) and be careful for cool air leakage Good example Air Cool a...
Page 27 - Drain test
Installation Manual 27 Installation ENGLISH CAUTION The supplied flexible drain hoseshould not be curved, neitherscrewed. The curved or screwedhose may cause a leakage of water. ! [Ceiling Concealed Duct/Ceiling Cassette Type] • Drain piping must have down-slope (1/50 to 1/100): be sure not to provi...
Page 28 - Attention; Unit
28 Multi Air Conditioner 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). 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 ...
Page 29 - Compare the flared work with figure.; Flaring work; Flaring Work and Connection of Piping; Pipe diameter
Installation Manual 29 Flaring Work and Connection of Piping ENGLISH Main cause of gas leakage is defect in flaringwork. Carry out correct flaring work in thefollowing procedure. 1) Cut the pipes and the cable. n Use the accessory piping kit or the pipespurchased locally. n Measure the distance betw...
Page 30 - Connecting pipe order; Connection of piping - Outdoor
30 Multi Air Conditioner Flaring Work and Connection of Piping 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 Finally, tighten the flare nut with torque wrenchuntil the wrench clicks. • When ...
Page 32 - Branch; • Branch pipe should be insulated with the insulator in each kit.
32 Multi Air Conditioner Flaring Work and Connection of Piping Viewed from point Ain direction of arrow Horizontalplane Gas Pipe Model PMBL5620 Ø 19.05 Ø 19.05 Liquid Pipe Within +/- 10° A Ø 9.52 Ø 9.52 Ø 9.52 Ø 19.05 Y branch A B To Outdoor Unit [unit: mm] To BD Unit A B Facing upwards Facing downw...
Page 34 - Procedure; Installation of The Main Unit
34 Multi Air Conditioner Flaring Work and Connection of Piping : • 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 ...
Page 35 - Installation Manual; Power supply cable; Connect the cable to the Indoor unit
Installation Manual 35 Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit ENGLISH Connect the cable to the indoor unit by connecting the wires to the terminals on the controlboard individually according to the outdoor unit connection. (Ensure that the color of the wires of t...
Page 36 - Multi Air Conditioner; Connect the cable to the Distributor unit; outside pressure being exerted on the terminal block.; Precautions when laying power and ground wiring; When laying ground wiring, you must use round pressure terminals.
36 Multi Air Conditioner Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit • Connect refrigerant pipes and connection wires to the appropriate ports maked with matching alphabets (A, B and C) on this unit. • Follow the instructions on the wiring nameplate to connect the con...
Page 37 - A room; In Case of 3 rooms
Installation Manual 37 Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit ENGLISH (1) Remove the control cover. Loosen the two screws, and slide the cover in the directionof the arrow. (2) Pull out connection cable through conduit. After conduit to the panel, fix nut to theo...
Page 38 - Connect the cable to the Outdoor unit; Remove the control cover from the unit by
38 Multi Air Conditioner 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 controlboard individually as the following. 2. Secure ...
Page 40 - (1) Remove the side panel and knockouts of conduit; How to connect wiring to the terminals; For strand wiring; Connection method of the connecting cable(Example); Strand wire; * The feature may be changed according to the
40 Multi Air Conditioner Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit (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. (...
Page 41 - Insulating the Pipe and Special Piping Applications
Installation Manual 41 Checking the Drainage, Insulating the Pipe and Special Piping Applications ENGLISH Insulate the piping by wrapping the connectingportion of the indoor unit with insulation materialand secure it with two kinds of vinyl tape. • If you want to connect an additional drain hose, th...
Page 42 - : Leakage testing shoud be done for; Leak Checking; 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 corros...
Page 43 - Finishing the job; Evacuation
Installation Manual 43 Air Purging and Evacuation ENGLISH 1. Connect the charge hose end described in the preceding steps to the vacuum pump toevacuate the tubing and indoor unit.Confirm the "Lo" knob of the manifold valve isopen. Then, run the vacuum pump.The operation time for evacuation v...
Page 44 - Charging; Additional Charge; Multiple Piping Models
44 Multi Air Conditioner Charging Important: If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge usingthe charge amount specified on the Unit`s specification label. Multiple Piping Models Additional charge(oz ) = (Total Installation Piping Length-Standard ...
Page 45 - Distributor type Models
Installation Manual 45 Charging ENGLISH h If the total additional charge value after calculation comes out to be negative, then do not consideradditional charge. A Ex) A8UW60GFA2 A B C a b c 18k 9k 9k d e 9k 18k Distributor type Models Additional charge (oz) = ((Total Main piping Length - Main Stand...
Page 46 - Fix the PI485 PCB as shown in Fig.
46 Multi Air Conditioner 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 48/54 kBtu/h This label is should be applied in the location where This label is should be applied in the location where LGAP(Sub ...
Page 47 - Prepare remote control; Test Running
Installation Manual 47 Test Running ENGLISH Prepare remote control Remove the battery cover by pulling it accordingto the arrow direction.Insert new batteries makingsure that the (+) and (–) of battery are installedcorrectly. Reattach the cover by pushing it backvinto position. Evaluation of the per...
Page 48 - DIP Switch; switch appropriately during installation.; Function
48 Multi Air Conditioner Function If you set the DIP Switch when power is on, the change insetting is not applicable.The changing setting is enabled only when Power is reset. DIP Switch Function 1 2 3 4 5 5 Normal Operation (No Function) 5 Forced Cooling Operation 5 Wiring Error Check 5 Saving Power...
Page 49 - Setting Procedure; Set the DIP Switch as follow after shutting the power; Forced Cooling Operation
Installation Manual 49 Function ENGLISH Adding the refrigerant in winter. Setting Procedure 1. Set the DIP Switch as follow after shutting the power source down. 2. Reset the power. 3. Check that the Red LED of PCB is on during work. (The indoor unit is operated by force.) 4 Add the specific amount ...
Page 50 - Set the DIP Switch as follow after shutting the power; You can check whether or not the wiring is correct.; correctly to operate the product.; Saving Power Consumption
50 Multi Air Conditioner Function Saving Power Consumption operation is the function whichenables efficient operation by lowering the maximum powerconsumption value. Setting Procedure 1 Set the DIP Switch as follow after shutting the power source down. 2 Reset the power. 1sec 1sec 1sec LED1 (Red) LE...
Page 51 - Saving Power Consumption Current level.; Night Quiet Mode
Installation Manual 51 Function ENGLISH Saving Power Consumption Current level. Night Quiet Mode operation lowers the noise level of the outdoor unit by changing the compfrequency and fan speed. This function is operated all night long. Setting Procedure 1. Set the DIP Switch as follow after shuttin...
Page 52 - Set the DIP Switch as follow after shutting the power source down.; Mode Lock with Night Quiet Mode; Only Cooling Mode; Mode Lock; be stopped until fan speed “Power” is changed.
52 Multi Air Conditioner Function Setting Procedure 1. Set the DIP Switch as follow after shutting the power source down. 2. Reset the power. Mode Lock with Night Quiet Mode Saving Power Consumption with Mode Lock. Mode Lock (Cooling) + Night Quiet Mode(step 1) Mode Lock (Cooling) + Night Quiet Mode...
Page 53 - Operating Method; PCB Display
Installation Manual 53 Function ENGLISH 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. Tact S/W Item Display Example 1 page 2 page 1 ti...
Page 54 - Max Combination Capacity
54 Multi Air Conditioner Max Combination Capacity Max Combination Capacity Multi Piping Type Capacity (kBtu/h) Max Room No. Combination Indoor Capacity (kBtu/h) Max Combination Capacity (kBtu/h) 18 2 7,9,12,15 24 24 3 7,9,12,15,18,24 33 30 4 7,9,12,15,18,24 40 36 4 7,9,12,15,18,24 48 Distributor Typ...
