LG A4UQ28GFA0 Installation Manual Download Page 1

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INSTALLATION MANUAL

AIR

CONDITIONER

www.lg.com

• 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

MFL67452303

Rev.01_032019

ENGLISH

Summary of Contents for A4UQ28GFA0

Page 1: ...he 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 MFL67452303 Rev 01_032019 Copyright 2012 2019 LG Electronics Inc All Rights Reserved ENGLISH ...

Page 2: ...uality may deteriorate if the air conditioner is used for many hours Clean the air filter once every 2 weeks Dust and impurities collected in the air filter may block the air flow or weaken the cooling dehumidifying functions For your records Staple your receipt to this page in case you need it to prove the date of purchase or for warranty purposes Write the model number and the serial number here...

Page 3: ...nd cause the safety limit to be exceeded Hazards due to lack of oxygen in the room could result Installation Do not use a defective or underrated circuit breaker Use the correctly rated breaker and fuse There is risk of fire or electric shock For electrical work contact the dealer seller a qualified electrician or an Authorized Service Center Do not disassemble or repair the product by yourself Th...

Page 4: ... Perform ventilation regularly Oxygen deficiency could occur and hence harm your health Do not open the front grille of the product during operation Do not touch the electrostatic filter if the unit is so equipped There is risk of physical injury electric shock or product failure If strange sound smell or smoke comes from product Immediately turn the breaker off or disconnect the power supply cabl...

Page 5: ...as leaks during the installation ventilate the area immediately Otherwise it can be harmfull for your health Dismantling the unit treatment of the refrigerant oil and eventual parts should be done in accordance with local and national standards Replace the all batteries in the remote control with new ones of the same type Do not mix old and new batteries or different types of batteries There is ri...

Page 6: ...g Outdoor 22 Installation 23 Installation of The Main Unit 24 CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT 24 Connect the cable to the Indoor unit 25 Connect the cable to the Outdoor unit 27 Connection of Wiring 28 CHECKING THE DRAINAGE AND FORMING THE PIPINGS 28 Checking the Drainage 29 Forming the Piping 30 AIR PURGING AND EVACUATION 30 Checking method 31 Evacuation 32 INSTALLATION ...

Page 7: ... Multi meter Hexagonal wrench Ammeter Gas leak detector Thermometer Level Flaring tool set Name Name Quantity Shape Installation plate 1 EA Type A screw 5 EA Type B screw 2 EA Type C screw 2 EA Remote control holder 1 EA The feature can be changed according a type of model SC SB Installation Parts Installation Tools INSTALLATION ...

Page 8: ...ccording to the type of model Unit mm Foundation bolt executing method 200 1012 361 Nut 75 75 200 Spring washer Frame Anti vibration materials Four bolt are required 3 thread ridges H Beam Concrete base 100 WARNING Be sure to remove the Pallet Wood Support of the bottom side of the unit Base Pan before fixing the bolt It may cause the unstable state of the unit settlement and may cause freezing of...

Page 9: ...e through the wall for piping connections must be done safely Type 1 Type 2 Type 3 Installation Plate Chassis Hook Type A Screws Installation Plate Chassis Hook Type A Screws Installation Plate Chassis Hook Type A Screws Indoor Type Capacity kBtu h Type Wall mounted ART COOL Mirror 9 12 1 18 24 2 3 Ø 65 Ø 65 133 95 Right rear piping Left rear piping Installation Plate Place a level on raised tab U...

Page 10: ...lace where noise and vibration are minimum Select a place so that the warm air and noise from the air conditioner do not disturb neighbors Place that can sufficiently endure the weight and vibration of the outdoor unit and where even installation is possible Place that has no direct influence of snow or rain Place with no danger of snowfall or icicle drop Place without weak floor or base such as d...

Page 11: ...5 90 15 30 15 Capacity kBtu h Total Length Max Main Pipe Length A B Total Branch Pipe Length Max Branch Pipe Length Max Elevation h1 In In Elevation h2 Capacity kBtu h Total Length Max Length A B Max Elevation h1 ln ln Elevation h2 18 30 or 50 25 15 7 5 26 60 or 70 25 15 7 5 30 70 25 15 7 5 36 75 25 15 7 5 Capacity is based on standard length and maximum allowance length is on the basis of reliabi...

Page 12: ...arge should be taken in account for the length of extra pipe Multiple Piping Models Additional Charge Total main pipe A B C 30 m Each branch pipe a 10 m b 8 m c 5 m d 3 m e 10 m Additional Charge 30 5 x 50 10 5 x 20 8 5 x 20 5 5 x 20 3 5 x 20 10 5 x 20 7 5 x 100 1270 g A Ex Distributor type Model 1 Ø 40 kBtu h A B C a b c 7 k 9 k 9 k d e 9 k 18 k Model Main Piping length Branch piping length Stand...

Page 13: ...mation to the surface of the wall Upper part guide groove Right part guide groove 3 Please fix remote controller upper part into the setup board attached to the surface of the wall as the picture below and then connect with setup board by pressing lower part Please connect not to make a gap at the remote controller and setup board s upper and lower right and left part When separating remote contro...

Page 14: ...in the wall It can cause damage in the temperature sensor Do not install the cable to be 50 m or above It can cause communication error When installing the extension cable check the connecting direction of the connector of the remote controller side and the product side for correct installation If you install the extension cable in the opposite direction the connector will not be connected Specifi...

Page 15: ...oller about 5 ft 1 5 m above the floor in an area with good air circulation at an average temperature Do not install the remote controller where it can be affected by Drafts or dead spots behind doors and in corners Hot or cold air from ducts Radiant heat from sun or appliances Concealed pipes and chimneys Uncontrolled areas such as an outside wall behind the remote controller This remote controll...

Page 16: ...void dropping burrs into the tubing Putting nut on Remove flare nuts attached to indoor and outdoor unit then put them on pipe tube having completed burr removal not possible to put them on after flaring work Flaring work Carry out flaring work using flaring tool as shown below Firmly hold copper pipe in a bar in the dimension shown in the table below Copper tube 90 Slanted Uneven Rough Pipe Reame...

Page 17: ...Be sure that the drain hose is located at the lowest side of the bundle Locating at the upper side can cause drain pan to overflow inside the unit Inclined Inside is shining without scratches Smooth all round Even length all round Surface damaged Cracked Uneven thickness Improper flaring Drain hose Drain hose Connecting pipe Connecting cable Tape Drain hose Connecting pipe Connecting cable Tape Dr...

Page 18: ...are nut with a wrench When extending the drain hose at the indoor unit install the drain pipe Wrap the insulation material around the connecting portion Overlap the connection pipe insulation material and the indoor unit pipe insulation material Bind them together with vinyl tape so that there is no gap Wrap the area which accommodates the rear piping housing section with vinyl tape Outside diamet...

Page 19: ...onnecting pipe order 1 ROOM A E gas side pipe 2 ROOM A E liquid side pipe 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 Wrap with vinyl tape Drain hose Pipe Vinyl tape wide Ø 12 7 1 2 inch Connector Outdoor unit Main gas side valve Main liquid side valve G...

Page 20: ...m 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 Insects or small animals entering the outdoor unit may cause a short circuit in the electrical box Outdoor unit Continuous Forward Sideways Backward Knock out Base pan Downward Gas side piping Bigger Dia Liquid side piping Smaller Dia Putty or insulating ma...

Page 21: ...pipe joints Insulator included with kit Insulator for field piping Tape field supply Ⓐ To Outdoor Unit Ⓑ To BD Unit Ensure that the branch pipes are attached horizontally or vertically see the diagram below Branch pipe should be insulated with the insulator in each kit Model Gas Pipe Liquid Pipe PMBL3620 Ø 15 88 Ø 15 88 Ø 15 88 Ø 9 52 Ø 9 52 Ø 9 52 unit mm Branch ...

Page 22: ...iagram below for both ceiling suspended installation and wall mounted installation This unit does not require drain treatment as it uses internal foam treatment as low pressure piping insulation Service direction is the side B and C The piping for the indoor unit may be led around in direction A The inclination of side B must be within 5 degrees forward or back or to the sides 50 30 111 B C 50 50 ...

Page 23: ...nstalling the hanger Screws M5 Screws M5 locally procude locally procude Screws M5 locally procude PE P E BD unit Six sided Nut Six sided Nut M 10 or M 8 M 10 or M 8 Six sided Nut M 10 or M 8 Hanger metal Hanger metal Hanger metal Flat washer Flat washer Flat washer Hanging bolt Hanging bolt Hanging bolt M 10 or M 8 15 00 NOTE This unit has two different installation types 1 Ceiling suspended type...

Page 24: ...that not to be pulled out easily Connect the wires according to color codes by referring the wiring diagram CAUTION CONNECTING THE CABLE BETWEEN INDOOR UNIT AND OUTDOOR UNIT The power cord connected to the outdoor unit should be complied with the following specifications Cable type approved by HAR or SAA This equipment shall be provided with a cable set complying with the national regulation The p...

Page 25: ...urn out of the wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 6 Confirm that the cable thickness is as specified in the power source specification Particularly note the relation between cable length and thickness 7 Do not install an earth le...

Page 26: ... wire and connect firmly then secure to prevent outside pressure being exerted on the terminal block Use an appropriate screwdriver for tightening the terinal screws A screwdriver with a small head will strip the head and make proper tighterning impossible Over tightening the terminal screws may break them Round pressure terminal Power wire Connect same thickness wiring to both sides It is forbidd...

Page 27: ...o the circuit diagram on the control cover inside outdoor unit 1 Remove the control cover Loosen the two screws and slide the cover in the direction of the arrow 2 Perform wiring with reference the wiring diagram on a control cover of outdoor unit Allow 300 mm for the pulling out section of harness Fix the wires completely with wire clamps 4 locations 3 Put in the cover in the direction of the arr...

Page 28: ... 1 The drain hose should point downward for easy drain flow 2 Do not make drain piping Drain pan Drain hose Leakage checking Connecting area drain hose Leakage checking Downward slope Do not raise Water leakage Accumulated drain water Air Waving Water leakage Tip of drain hose dipped in water Water leakage Ditch Less than 50 mm gap CHECKING THE DRAINAGE AND FORMING THE PIPINGS CHECKING THE DRAINAG...

Page 29: ...connecting cable from down to up 2 Secure the tapped piping along the exterior wall using saddle or equivalent Trap is required to prevent water from entering into electrical parts Plastic band Taping Drain hose Pipings Connecting cable Power supply cord Seal a small opening around the pipings with gum type sealer In cases where the Outdoor unit is installed above the Indoor unit perform the follo...

Page 30: ...bottom when you pressurize the system Usually the cylinder is used in a vertical standing position Do a leakage test of all joints of the tubing both indoor and outdoor and both gas and liquid side service valves Bubbles indicate a leak Be sure to wipe off the soap with a clean cloth After the system is found to be free of leaks relieve the nitrogen pressure by loosening the charge hose connector ...

Page 31: ...rvice port slightly to release the pressure then remove the hose Replace the flare nut and its bonnet on the gas side service port and fasten the flare nut securely with an adjustable wrench This process is very important to prevent leakage from the system Lo Hi Manifold valve Vacuum pump Open Open Pressure gauge Indoor unit Outdoor unit Finishing the Job Use a vacuum pump or Inert nitrogen gas wh...

Page 32: ...ler is installed LGAP Sub PCB for Central Controller is installed Please connect the wire after installing the LGAP Please connect the wire after installing the LGAP This is the space for installatio n of PI485 Gateway This is the space for installatio n of PI485 Gateway Accessor y Accessor y Please connect the wire after installing PI485 Please connect the wire after installing PI485 Gateway Gate...

Page 33: ...alve Measure the temperature of the intake and discharge of air Ensure the difference between the intake temperature and the discharge is more than 8 C For reference the gas side pressure of optimum condition is as below Cooling Refrigerant Outside ambient TEMP The pressure of the gas side service valve R410A 35 C 95 F 8 5 9 5 kg cm2 G 120 135 P S I G NOTE If the actual pressure are higher than sh...

Page 34: ...he product down WARNING CAUTION Unless the applicable DIP switch is set properly the product may not work If you want to set a specific function request that the installer sets the DIP switch appropriately during installation FUNCTION DIP Switch Function Normal Operation No Function Forced Cooling Operation Wiring Error Check Saving Power Consumption Step 1 Saving Power Consumption Step 2 Mode Loc...

Page 35: ...IP 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 of refrigerant When the green LED of PCB is on compressor is going to be off because of low pressure You should return the DIP Switch to operate normally after finishing the operation CAUTION DIP SW ...

Page 36: ...ture is too low in winter the wiring error check function will not be operated Red LED is lighting Power consumption and current Nomal Time Wiring Error Check You can check whether or not the wiring is correct Setting Procedure 1 Set the DIP Switch as follow after shutting the power source down 2 Reset the power 3 Check that the Re and Green LED of PCB are on during work The indoor unit is operate...

Page 37: ...1 14 16 22 22 22 Step2 A 7 7 5 8 5 11 13 18 18 18 Saving Power Consumption step 1 Mode Lock Cooling A4UQ28GFA0 only Saving Power Consumption step 2 Mode Lock Cooling Saving Power Consumption step 1 Mode Lock Heating Saving Power Consumption step 2 Mode Lock Heating Step 1 Step 2 h Noise level Step 1 Step 2 CAUTION If comp frequency and fan speed are down the cooling capacity may decrease according...

Page 38: ...essure 890 kPa LP 89 2 times Hi Pressure 2 900 kPa HP 290 1 time 3 times Discharge Temp 85 C DS 85 2 times 4 times Cond Out Temp 10 C CS 10 3 times 5 times Suction Temp 10 C SS 10 4 times 6 times ODU Air Temp 10 C AS 10 5 times 7 times Current 15 A A 15 6 times 8 times Voltage 230 V V 230 7 times 9 times Comp Hz 100 Hz F 100 8 times 10 times DC Link Voltage 230 V dc 230 TACT SW1 When you push the ...

Page 39: ...r draining to prevent damage from localized heavy rain and avoid frequent flooded area Sea wind Sea wind Sea wind Windbreak Periodic more than once year cleaning of the dust or salt particles stuck on the heat exchanger by using water Air conditioners should not be installed in areas where corrosive gases such as acid or alkaline gas are produced Do not install the product where it could be expose...

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