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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.
TYPE : MULTI
P/NO : MFL67452304
www.lg.com
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Table of Contents
Related Manuals for LG MULTI A3UQ26GFA0
Summary of Contents for LG MULTI A3UQ26GFA0
- Page 1 • 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. TYPE : MULTI www.lg.com P/NO : MFL67452304...
- 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 WARNING...
- Page 4 IMPORTANT SAFETY INSTRUCTIONS • When installing the unit, use the installation kit provided with the product. Otherwise the unit may fall and cause severe injury. • Indoor/outdoor wiring connections must be secured tightly and the cable should be routed properly so that there is no force pulling the cable from the connection terminals. Improper or loose connections can cause heat generation or fire.
- Page 5 IMPORTANT SAFETY INSTRUCTIONS • Do not install the product where the noise or hot air from the outdoor unit could damage or disturb the neighborhoods. It may cause a problem for your neighbors and hence dispute. • Always check for gas (refrigerant) leakage after installation or repair of product. Low refrigerant lev- els may cause failure of product.
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Page 6: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS TIPS FOR SAVING AIR PURGING AND EVAC- ENERGY UATION Checking method INSTALLATION Evacuation INSTALLATION OF INDOOR, OUTDOOR INSTALLATION PI485 UNIT TEST RUNNING Select the best location Fixing Installation Plate FUNCTION Piping length and elevation Dip S/W Setting Refrigerant charge Forced Cooling Operation... -
Page 7: Installation
INSTALLATION INSTALLATION Installation Parts Name Quantity Shape Installation plate 1 EA The feature can be changed according a type of model. Type "A" screw 5 EA Type "B" screw 2 EA Type "C" screw 2 EA Remote control 1 EA holder Installation Tools Figure... -
Page 8: Installation Of Indoor, Outdoor Unit
INSTALLATION OF INDOOR, OUTDOOR UNIT INSTALLATION OF INDOOR, OUTDOOR UNIT Outdoor unit Read completely, then follow step by step. Select the best location If an awning is built over the unit to pre- vent direct sunlight or rain exposure, make sure that heat radiation from the condens- Indoor unit er is not restricted. -
Page 9: Fixing Installation Plate
INSTALLATION OF INDOOR, OUTDOOR UNIT Fixing Installation Plate Capacity Indoor Type Type (kBtu/h) The wall you select should be strong and solid enough to prevent vibration Wall mounted 9 / 12 Mount the installation plate on the wall /ART COOL with type "A"... -
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 Capacity(kBtu/h) Total Length Max Length(A/B) (h1) (h2) Distributor type Models (Unit: m) Capacity Max Main Pipe Total Branch Max Branch Max Elevation In - In Elevation Total Length... -
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(Additional Charge) (Unit: g) Model Total Piping Length(m) – 30 – 40 – 50 –... -
Page 12: 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 13 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 10m.
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Page 14: 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 15: 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 pur- chased locally. -
Page 16: 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 17 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 Connecting the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installation Drain hose plate by moving it left and right.
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Page 18: 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 pip- ing housing section. Vinyl tape(wide) Drain hose CAUTION Installation Information (For right piping) For right piping, follow the instruction below. - Page 19 FLARING WORK AND CONNECTION OF PIPING - For the units with capacity more than 48 kBtu/h, 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 (Figure3)
- Page 20 FLARING WORK AND CONNECTION OF PIPING Branch [unit:mm] Model Gas Pipe Liquid Pipe Ø15,88 Ø15,88 Ø9,52 Ø9,52 PMBL3620 Ø15,88 Ø9,52 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 plane...
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Page 21: 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 22: 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 23: 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 24: 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 25 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.
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Page 26: 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 27: 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 leak- age and goes out the drain exit. -
Page 28: 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 mate- down to up. -
Page 29: Air Purging And Evacuation
AIR PURGING AND EVACUATION AIR PURGING AND EVACUATION The air and moisture remaining in the refriger- CAUTION ant system have undesirable effects as indi- cated 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 30: Evacuation
AIR PURGING AND EVACUATION - Replace the valve caps at both gas and liquid WARNING 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 31: Installation Pi485
INSTALLATION PI485 INSTALLATION PI485 Fix the PI485 PCB as shown in Fig. Detailed installation method refer to PI485 Installation Manual. 30 / 36k 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 32: Test Running
TEST RUNNING TEST RUNNING - Check that all tubing and wiring have been - For reference, the gas side pressure of opti- properly connected. mum condition is as below.(Cooling) - Check that the gas and liquid side service valves are fully open. The pressure of Outside ambi- Refrigerant... -
Page 33: 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 34: Forced Cooling Operation
FUNCTION 18/26k 40/48/54k Forced Cooling Operation Adding the refrigerant in winter. DIP-SW Setting Procedure Set the Dip Switch as follow after shutting the power source down. 30 / 36k Reset the power. Check that the Red LED of PCB is on dur- ing work. -
Page 35: Wiring Error Check
FUNCTION Wiring Error Check CAUTION You can check whether or not the wiring is correct. • If Indoor unit doesn’t communicate to out- door Unit, function could not be operated Setting Procedure correctly. Set the Dip Switch as follow after shutting •... -
Page 36: Night Quiet Mode
FUNCTION Saving Power Consumption Current level. Model 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 Saving Power Consumption (step 2) Consumption (step 2) + Mode Lock (Cooling) + Mode Lock (Heating) -
Page 37: Pcb Display(18/26K Model Only)
FUNCTION PCB Display(18/26k 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. ❈ After 1page is displayed, subsequently 2page is displayed. TACT-SW1 Display Item... -
Page 38: Installation Guide At The Seaside
INSTALLATION GUIDE AT THE SEASIDE INSTALLATION GUIDE AT THE SEASIDE In case, to install the outdoor unit on the CAUTION 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.