LG L4UC488FA0 Installation Manual Download Page 2

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2 Room Air Conditioner

Multi Type Air Conditioner Installation Manual

TABLE OF CONTENTS

The following should be
always observed for safety ....................................3~6

Installation of indoor, outdoor unit .......................7~9

Flaring work and connection of piping.............10~13

Connecting the Cable between Indoor Unit and
Outdoor Unit ........................................................14~16

Checking the Drainage, Forming the
Pipings and Long Pipe Setting ..........................17~18

Air Purging...........................................................19~20

Test running...............................................................21

❏

Level gauge

❏

Screw driver

❏

Electric drill

❏

Hole core drill (ø50mm)

❏

Horizontal meter

❏

Flaring tool set

❏

Specified torque wrenches
1.8kg.m, 4.2kg.m, 5.5kg.m, 6.6kg.m
(different depending on model No.)

❏

Spanner .................Half union

❏

A glass of water

❏

Screw driver

❏

Hexagonal wrench(4mm)

❏

Gas-leak detector

❏

Vacuum pump

❏

Gauge manifold

❏

Owner's manual

❏

Thermometer

❏

Holder Remote Control

Installation Requirements

Required Tools

Summary of Contents for L4UC488FA0

Page 1: ...chsup html IMPORTANT Please read this installation manual completely before installing the product When the power cord is damaged replacement work shall be performed by authorized personnel only Installation work must be performed in accordance with the national wiring standards by authorized personnel only ...

Page 2: ...hecking the Drainage Forming the Pipings and Long Pipe Setting 17 18 Air Purging 19 20 Test running 21 Level gauge Screw driver Electric drill Hole core drill ø50mm Horizontal meter Flaring tool set Specified torque wrenches 1 8kg m 4 2kg m 5 5kg m 6 6kg m different depending on model No Spanner Half union A glass of water Screw driver Hexagonal wrench 4mm Gas leak detector Vacuum pump Gauge manif...

Page 3: ...arts Provided Type A screws and plastic anchors Type B screws Holder Remote Control Installation plate Standard Type more than 70cm more than 30cm more than 30cm Air Outlet Air Intake side rear Connection pipe Drain hose Connecting wire Control cover more than 30cm ...

Page 4: ...to do Be sure to follow the instruction Installation Install the panel and the cover of control box securely There is risk of fire or electric shock Always install a dedicated circuit and breaker Improper wiring or installation may cause fire or electric shock Use the correctly rated breaker or fuse There is risk of fire or electric shock Do not use a defective or underrated circuit breaker Use th...

Page 5: ...osion or injury Do not install the product on a defective installation stand It may cause injury accident or damage to the product Be sure the installation area does not deteriorate with age If the base collapses the air conditioner could fall with it causing property damage product failure and personal injury Do not let the air conditioner run for a long time when the humidity is very high and a ...

Page 6: ...t To avoid vibration or water leakage Do not install the product where the noise or hot air from the outdoor unit could damage the neighborhoods It may cause a problem for your neighbors Use two or more people to lift and transport the product Avoid personal injury Do not install the product where it will be exposed to sea wind salt spray directly It may cause corrosion on the product Corrosion pa...

Page 7: ... air conditioner weight into account and select a place where noise and vibration are minimum 5 Select a place so that the warm air and noise from the air conditioner do not disturb neighbors Rooftop Installations If the outdoor unit is installed on a roof structure be sure to level the unit Ensure the roof structure and anchoring method are adequate for the unit location Consult local codes regar...

Page 8: ...rs It does not matter which unit is higher 1 1 The maximun allowable level piping length and Refrigerant Charge 7 5m 7 5m A B C D Outdoor Unit Indoor Unit Sandard Length Max piping A B C D E A B C D Ø 9 52mm over Ø 12 7mm L4UC488FA0 7 5m 25m 25m 25m 25m 60m A B C D 20g m 30g m Model Outdoor Unit Pipe Size Gas Max total piping length over the total 30m pipe length Additional Charge Extra refrigeran...

Page 9: ...plate routing of the wiring to power outlets is through the walls typically Drilling the hole through the wall for piping connections must be done safely How to fix installation plate Installation Plate Type A screw Installation plate Ø70mm Left rear piping Right rear piping C D B A Ø70mm SU S3 Right rear piping B A D C Installation plate SU 9k 12k 92 44 67 44 S3 18K 58 3 292 3 CHASSIS Grade Dista...

Page 10: ...all burrs from the cut cross section of pipe tube 2 Put the end of the copper tube pipe in a downward direction as you remove burrs in order to avoid 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 flar...

Page 11: ...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 shiny without scratches Smooth all round Even length all round Surface damaged Cracked Uneven thickness Improper flaring Connection of piping Indoor Drain hose Drain hose Connecting pipe Connecting cable Tape Drain hose Connecting cable Loop Gas side piping Liqu...

Page 12: ... by hand 2 Tighten the flare nut with a wrench 3 When extending the drain hose at the indoor unit install the drain pipe Wrap the insulation material around the connecting portion 1 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 2 Wrap the area which accommodates the rear piping housing section...

Page 13: ... upper side of clamp and unfold the tubing to downward slowly Bad case Following bending type from left to right could cause problem of pipe damage Align the center of the piping and sufficiently tighten the flare nut by hand 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 arro...

Page 14: ... CAUTION The circuit diagram is not subject to change without notice Be sure to connect wires according to the wiring diagram Connect the wires firmly so that not to be pulled out easily Connect the wires according to color codes by referring the wiring diagram CAUTION Provide a circuit breaker between power source and the unit as shown below CAUTION The power cord connected to the outdoor unit sh...

Page 15: ...th driver Fig 2 3 Connect the connecting pipe Fig 3 4 Connect the cables LG doesn t supply to the terminal block in the front panel Fig 3 5 Secure the panel A to the original position with the screw 6 Insert the plastic tube bushing in small hole in order to prevent the connecting wires from being cut by sharp edge of the hole Fig 4 America Canada only 7 Close the side inlet grille Wiring Details ...

Page 16: ...rcuit diagram posted on the inside of control cover 2 Firmly tighten the terminal screws to prevent them loosening After tightening pull the wires lightly to confirm that they do not move If they are loose the unit the unit will not operate normally or it can cause burn out of the wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 See to that the starting volt...

Page 17: ...ass of water on the evaporator 2 Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit Drain piping 1 The drain hose should point downward for easy drain flow 2 Do not make drain piping Downward slope Do not raise Accumulated drain water Tip of drain hose dipped in water Air Waving Water leakage Water leakage Ditch Less than 50mm gap Water...

Page 18: ...lowing 1 Tape the piping drain hose and connecting cable from down to up 2 Secure the tapped piping along the exterior wall using saddle or equivalent In cases where the Outdoor unit is installed above the Indoor unit perform the following 1 Tape the piping and connecting cable from down to up 2 Secure the taped piping along the exterior wall Form a trap to prevent water entering the room 3 Fix th...

Page 19: ...s and dry nitrogen gas cylinder to this service port with charge hoses CAUTION Be sure to use a manifold valve for leakage test If it is not available use a stop valve for this purpose The Hi knob of the manifold valve must always be kept close Pressurize the system to no more than 150 P S I G with dry nitrogen gas and close the cylinder valve when the gauge reading reached 150 P S I G Next test f...

Page 20: ...b of the manifold valve and stop the vacuum pump Finishing the job 1 With a service valve wrench turn the valve stem of liquid side valve counter clockwise to fully open the valve 2 Turn the valve stem of gas side valve counter clockwise to fully open the valve 3 Loosen the charge hose connected to the gas side service port slightly to release the pressure then remove the hose 4 Replace the flare ...

Page 21: ...arge 1 Measure the pressure of the gas side service valve 2 Measure the temperature of the intake and discharge of air 3 Ensure the difference between the intake temperature and the discharge is more than 8 C 4 For reference the gas side pressure of optimum condition is as below Cooling If the actual pressure are higher than shown the system is most likely over charged and charge should be removed...

Page 22: ...P No 3828A21026A ...

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