LG A7UW40GFA0 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
MFL67655701
Rev.01_011719
Copyright © 2012 - 2019 LG Electronics Inc. All Rights Reserved.
www.lg.com
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Table of Contents
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Summary of Contents for LG A7UW40GFA0
- 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 MFL67655701 Rev.01_011719 Copyright © 2012 - 2019 LG Electronics Inc. All Rights Reserved.
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Page 2: Tips For Saving Energy
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 - Please read the label on the product. Incorrect refrigerant used can prevent the normal operation of the unit. Operation • When the product is soaked (flooded or submerged) in water , contact an Authorized Service Center for repair before using it again.
- Page 5 IMPORTANT SAFETY INSTRUCTIONS • Installation work must be performed in accordance with the National Electric Code by qualified and authorized personnel only. • The user must carry out checks and cleaning of routine to avoid defective performance. - In a special situation, only service personnel can carry out repair work. Operation •...
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Page 6: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS TIPS FOR SAVING ENERGY INSTALLATION INSTALLATION OF INDOOR, OUTDOOR UNIT Select the best location Foundation for Installation Piping length and elevation Refrigerant charge FLARING WORK AND CONNECTION OF PIPING Flaring work Connection of piping - Indoor Connection of piping - Outdoor Installation Installation of The Main Unit... -
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 Outdoor unit Read completely, then follow step by step. Select the best location If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that heat radiation from the condenser is Indoor unit not restricted. -
Page 9: Foundation For Installation
INSTALLATION OF INDOOR, OUTDOOR UNIT Foundation for Installation • Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise after installation. • Fix the unit securely by means of the foundation bolts. (Prepare 4sets of M12 foundation bolts, nuts and washers each which are available on the market.) •... -
Page 10: Piping Length And Elevation
INSTALLATION OF INDOOR, OUTDOOR UNIT Piping length and elevation Distributor type Models (Unit: m) Capacity Total Max Main Pipe Total Branch Max Branch Max Elevation In - In Phase (kBtu/h) Length Length (A/B) Pipe Length Pipe Length (h1) Elevation (h2) 1 Ø... -
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. Distributor type Models (Unit: m) Main Piping length Branch piping length Phase Capacity(kBtu/h) Standard Additional Standard Additional length(m) refrigerant(g/m) -
Page 12: 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 13: 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 14 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.
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Page 15: 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 range within which they fit into the rear Pipe piping housing section. Vinyl tape(wide) Drain hose CAUTION Installation Information (For right piping) For right piping, follow the instruction below. - Page 16 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 17 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...
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Page 18: 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 19: 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 20: 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 21 CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT 7~9 Unit (1 Ø) 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).
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Page 22: 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 23 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 24: 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 25: 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 26: 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 27: 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 28: 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 29: Installation Pi485
INSTALLATION PI485 INSTALLATION PI485 Fix the PI485 PCB as shown in Fig. Detailed installation method refer to PI485 Installation Manual. 1 Ø : 40 kBtu/h, 48 kBtu/h, 56 kBtu/h PI48 5 Gate PI48 5 Gate way. way. llatio n of llatio n of e for insta e for insta... -
Page 30: 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 31: 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 32: Forced Cooling Operation
FUNCTION 40/48/56(1 Ø) kBtu/h Forced Cooling Operation Adding the refrigerant in winter. Setting Procedure Set the DIP Switch as follow after shutting the power source down. Reset the power. Check that the Red LED of PCB is on during work. (The indoor unit is operated by force.) Add the specific amount of refrigerant. -
Page 33: 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 operated correctly. Setting Procedure • Only the wrong wiring connection is Set the DIP Switch as follow after shutting displayed. -
Page 34: Night Quiet Mode
FUNCTION Saving Power Consumption Current level. Phase 1 ¢ Model 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 Saving Power Consumption (step 2) -
Page 35: 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 36: Max Combination Capacity
MAX COMBINATION CAPACITY MAX COMBINATION CAPACITY Distributor Type Capacity Combination Indoor Combination Capacity Phase Max Room No. (kBtu/h) Capacity (kBtu/h) Range (kBtu/h) 5, 7, 9, 12, 18, 24 16~52 1 Ø 5, 7, 9, 12, 18, 24 19~63 5, 7, 9, 12, 18, 24 23~73 The combination of indoor unit is to be decided that the sum of indoor unit capacity index must be smaller than the maximum combination capacity of outdoor unit. -
Page 37: 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 38: Seasonal Wind And Cautions In Winter
(If width of the frame is wider than that of the product, snow may accumulate) Don't install the suction hole and discharge hole of the Outdoor Unit facing the seasonal wind. Model Voltage, Hz Current(A) A7UW40GFA0 26.0 A8UW48GFA0 220 V~ 60 Hz 27.0 A9UW56GFA0...