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LG LMNC126LRL0, Installation Manual

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LG LMNC126LRL0 Installation Manual Download Page 1

ENGLISH

ESPAÑOL

LG
Air Conditioner

INSTALLATION MANUAL

LG

website http://www.lgservice.com
e-mail   http://www.lgeservice.com/techsup.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.

Summary of Contents for LMNC126LRL0

Page 1: ...e com techsup 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: ...equired Parts Required Tools Installation guide map Four Type A screws plastic anchors Connecting cable Level gauge Screw driver Electric drill Hole core drill ø50mm Horizontal meter Pipes Gas side 1 2 3 8 Liquid side 1 4 Refer to page 7 Insulation materials Additional drain pipe Inner Diameter 20mm Flaring Tools set Specified to torque wrenches 1 8kg m 4 2kg m 5 5kg m 6 6kg m different depending ...

Page 3: ...rews and plastic anchors Type B screws Holder Remote Control Installation plate Standard Type Side Rear Air intake vents Air outlet vents Piping Drain hose Control cover Connecting wire Side Rear Air intake vents Air outlet vents Piping Drain hose Control cover Connecting wire 48K Btu h 60K Btu h ...

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: ...explosion 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 an...

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: ...cted 2 Ensure that the spaces indicated by arrows around front back and side of the unit 3 Do not place animals and plants in the path of the warm air 4 Take the 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 in...

Page 8: ...ty Btu h Total Length m Max Length A B m Max Elevation h1 m In In Elevation h2 m 12k 1 2 1 4 7 5 30 24k 5 8 3 8 7 5 30 Indoor Capacity Btu h Pipe Size Gas Liquid Standard Length Additional Refrigerant m g m h2 h1 A B CAUTION Capacity is based on standard length and maximum allowance length is on the basis of reliability Oil trap should be installed every 5 7 meters ...

Page 9: ...enterline using a level 2 Measure the wall and mark the centerline It is also important to use caution concerning the location of the installation 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 pi...

Page 10: ...he 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 flaring tool as show...

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

Page 12: ...ighten 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 with vinyl ...

Page 13: ...h they fit into the rear piping housing section Wrap with vinyl tape Drain hose Pipe Vinyl tape wide CAUTION Installation Information For right piping For right piping follow the instruction below Good case Press on the 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 ...

Page 14: ...en the flare nut with torque wrench until the wrench clicks When tightening the flare nut with torque wrench ensure the direction for tightening following the arrow on the wrench A UNIT B UNIT C UNIT Gas side piping Liquid side piping Torque wrench Outdoor unit Connection of piping Outdoor Outside diameter Torque mm inch kg m Ø6 35 1 4 1 8 Ø9 52 3 8 4 2 Ø12 7 1 2 5 5 Ø15 88 5 8 6 6 Indoor Capacity...

Page 15: ... on the Control Cover Inside Outdoor Unit Connect the cable to the Indoor unit 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 t...

Page 16: ...burn 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 l...

Page 17: ...n 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 leakage ...

Page 18: ...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 bottom to top 2 Secure the taped piping along the exterior wall Form a trap to prevent water entering the room 3 Fix the piping onto the wall by saddle ...

Page 19: ...valve with pressure gauge 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...

Page 20: ...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 nut and its bonnet on the gas side service port and fasten the flare nut sec...

Page 21: ...the performance Operate unit for 15 20 minutes then check the system refrigerant charge 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 hi...

Page 22: ...port on the gas side service valve 2 Open the gas side service valve halfway and purge the air from the manifold hose using the refrigerant gas 3 Close the liquid side service valve all the way in 4 Turn on the unit s operating switch and start the cooling operation 5 When the low pressure gauge reading becomes 1 to 0 5kg cm2 G 14 2 to 7 1 P S I G fully close the gas side valve stem and then quick...

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