LG MULTI V Series 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.
Original instruction
MFL67798033
Rev.06_120123
Copyright © 2016 - 2023 LG Electronics Inc. All Rights Reserved.
www.lg.com
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Table of Contents
Related Manuals for LG MULTI V Series
Summary of Contents for LG MULTI V Series
- 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. Original instruction www.lg.com MFL67798033 Rev.06_120123 Copyright © 2016 - 2023 LG Electronics Inc. All Rights Reserved.
- Page 2 TIPS FOR SAVING ENERGY • The information contained in the manual is intended for use by a qualified service Here are some tips that will help you minimize the power consumption technician familiar with safety procedures and when you use the air conditioner. You can use your air conditioner equipped with the proper tools and test more efficiently by referring to the instructions below: instruments.
- Page 3 • Use a vacuum pump or Inert(nitrogen) gas • Do not touch the power switch with wet hands. when doing leakage test or air purge. Do not - There is risk of fire, electric shock, explosion, or compress air or Oxygen and do not use injury.
- Page 4 • When installting the unit in a hospital, communication - When transporting the outdoor unit, suspending it at station, or similar place, provide sufficient protection the specified positions on the unit base. Also against noise. support the outdoor unit at four points so that it - The inverter equipment, private power generator, cannot slip sideways.
- Page 5 SAFETY INSTRUCTIONS (for R32) • Do not use means to accelerate the defrosting process or to clean, other than those Read the precautions in This appliance is filled recommended by the manufacturer. this manual carefully with flammable before operating the unit. refrigerant.
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Page 6: Table Of Contents
TABLE OF CONTENTS TIPS FOR SAVING ENERGY SAFETY INSTRUCTIONS SAFETY INSTRUCTIONS (for R32) INSTALLATION PROCESS OUTDOOR UNITS INFORMATION OUTDOOR UNITS INFORMATION (for R32) ALTERNATIVE REFRIGERANT R410A, R32 SELECT THE BEST LOCATION INSTALLATION SPACE Air guide work LIFTING METHOD INSTALLATION The location of the Anchor bolts Foundation for Installation Preparation of Piping Plumbing materials and storage methods... -
Page 7: Installation Process
INSTALLATION PROCESS Power Supply : 3 Ø, 380-415 V 3N~, 50 Hz / 3 Ø, 380 V 3N~, 60 Hz System(HP) Refrigerant Precharged Amount Indicate clearly who will be responsible for switch setting. Determination of division work Net weight Make connection clearly between outdoor, indoor, Preparation of contract drawings 950 x 834 x 330 remote controller and option. -
Page 8: Alternative Refrigerant R410A, R32
ALTERNATIVE REFRIGERANT When installing the outdoor unit in a place that is constantly exposed to a strong wind like a coast or on a high story of a building, secure a normal R410A, R32 fan operation by using a duct or a wind shield. •... -
Page 9: Installation Space
INSTALLATION SPACE - U36A • The following values are the least space for installation. If any service area is needed for service according to field circumstance, obtain enough service space. • The unit of values is mm. In case of obstacles on the suction side 1. - Page 10 - U36A 2. Collective installation - U60A L > H L > H [Unit:mm] R410A [Unit:mm] 3HP, 4HP, 5HP, 6HP - U36A L > H L > H 500 or more In case of obstacles on the suction and the discharge side Obstacle height of discharge side is higher than the unit.
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Page 11: Air Guide Work
- m : Total refrigerant amount in the system 2. Collective installation - Total refrigerant amount : factory refrigerant charge + additional refrigerant amount - Amin : minimum area for installation - U60A L ≤ H L ≤ H Floor location Floor location Wall mounted Wall mounted... -
Page 12: Lifting Method
CAUTION LIFTING METHOD Be very careful while carrying the product. • When carrying the suspended, unit pass the ropes between legs of base panel under the unit. • Do not have only one person carry product if it is more than 20 kg. •... -
Page 13: The Location Of The Anchor Bolts
WARNING The location of the Anchor bolts • Install where it can sufficiently support the weight of the outdoor unit. If the support strength is not enough, the outdoor unit may drop and hurt people. • Install where the outdoor unit may not fall in strong wind or earthquake. -
Page 14: Plumbing Materials And Storage Methods
Opening shutoff valve Burrs removal - Completely remove all burrs from the cut cross section of pipe/tube. - Put the end of the copper tube/pipe to downward direction as you Remove the cap and turn the valve counter clockwise with the remove burrs in order to avoid to let burrs drop in the tubing. -
Page 15: Refrigerant Piping Installation
CAUTION Refrigerant piping on three principles Drying Cleanliness Airtight 1 Always use the nitrogen.(not use oxygen, carbon dioxide, and a Chevron gas): Please use the following nitrogen pressure Should be no moisture There is no refrigerant No dust inside. 0.02 MPa Oxygen – Promotes oxidative degradation of inside. -
Page 16: Pipe Connections Between Indoor And Outdoor Unit
PIPE CONNECTIONS BETWEEN Selection of Refrigerant Piping INDOOR AND OUTDOOR UNIT Outdoor unit U36A Chassis (1 FAN model) Gas pipe Liquid pipe Connect the refrigerant pipe, and after the refrigerant leakage Branching inspection, cover with insulation material and wrap with vinyl tape. pipe Main pipe Tighten the flare nut according to the specified torque. -
Page 17: Refrigerant Piping System
Refrigerant piping system Header Method Example : 6 Indoor Units Y branch method connected Ⓐ : Outdoor Unit Example : 5 Indoor Units Ⓑ : 1st branch L 80 m connected 40 m Ⓒ : Indoor Units Ⓐ : Outdoor Unit Ⓓ... - Page 18 WARNING Indoor Unit Connection • It is recommended that difference of piping length for pipes Indoor Unit connecting pipe from branch (a,b,c,d,e,f) connected to the Indoor Unit is minimized. Performance difference between Indoor Units may occur. Indoor Unit capacity Liquid pipe Gas pipe [mm(inch)] •...
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Page 19: Refrigerant Charging
WARNING Attach the additional refrigerant table of IDU. • Pipe to be vacuumed : gas pipe, liquid pipe • If the refrigerant amount is not exact, it may not operate properly. • If additionally bottled refrigerant amount is over 10 %, condenser burst or insufficient indoor unit performance may be caused. -
Page 20: Branch Pipe Fitting
Branch pipe Fitting • Header should be insulated with the insulator in each kit. Y branch Insulate the header using the insulation Ⓐ To Outdoor Unit material attached to the branch pipe kit Ⓑ To Branch Piping or Indoor Unit as shown in the figure. -
Page 21: Leak Test And Vacuum Drying
WARNING Header [unit:mm] Use a vacuum pump or Inert(nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and do not use Models Gas pipe Liquid pipe Flammable gases. Otherwise, it may cause fire or explosion. - There is the risk of death, injury, fire or explosion. -
Page 22: Vacuum Mode
WARNING Thermal insulation of refrigerant piping Use a vacuum pump or Inert(nitrogen) gas when doing leakage test Be sure to give insulation work to refrigerant piping by covering liquid or air purge. Do not compress air or Oxygen and do not use pipe and gas pipe separately with enough thickness heat-resistant Flammable gases. -
Page 23: Penetrations
Penetrations Outdoor Unit Inner wall (concealed) Outer wall Outer wall (exposed) Indoor Indoor Unit Unit Remote Remote control control Outdoor Unit Floor (fireproofing) Penetrating portion on fire Roof pipe shaft Indoor Indoor Unit Unit limit and boundary wall Remote Remote control control 2-Core Shield Cable... -
Page 24: Control Box And Connecting Position Of Wiring
CAUTION Communication and Power Cables Communication cable When the 400 volt power supply is applied to “N” phase by mistake, - Types : shielding cable check damaged parts in control box and replace them. - Cross section : 1.0~1.5 mm - Maximum allowable temperature: 60 °C Control box and connecting position of wiring - Maximum allowable cable length: under 300 m... -
Page 25: Wiring Of Main Power Supply And Equipment Capacity
Wiring of main power supply and equipment [Heat Pump] Between Indoor and Master Outdoor unit capacity - Use a separate power supply for the Outdoor Unit and Indoor Unit. Master SODU. B SODU. A IDU. B IDU. A CEN. B CEN. -
Page 26: Installation Of Io Module(Optional)
Installation of IO Module(optional) Automatic Addressing ① Assemble IO Module and bracket. The address of indoor units would be set by Automatic Addressing ② Fix the bracket on designated location with two clamp cords(105 - Wait for 3 minutes after supplying power. mm). -
Page 27: Group Number Setting
Cool & Heat selector Mode Function Option Value Action Remarks Content Display 1 Content Display 2 Content Display 3 Content Display 4 Implement Display 5 Mode setting method Change áâ Cool & Heat oP1~ Selected Save in the set Blank Selector the option EEPROM... -
Page 28: Night Low Noise Function
Night Low Noise Function Snow removal & rapid defrost In cooling mode, this function makes the ODU fan operate at low RPM Mode setting method to reduce the fan noise of ODU at night which has low cooling load. Master unit PCB DIP switch on : No.5 Night low noise function setting method Select the mode using ‘▶’, ‘◀’... -
Page 29: Priority Heating Operation
Priority Heating Operation This is the function that gives priority to the hot water supply operation (heating) for the model that cannot simultaneously operate heating and cooling. This function enables the appliance to supply hot water and operate indoor cooling by alternatevely heating using hydrokit and cooling operation. Mode setting method Setting the function Select the mode/function/option/value using ‘▶’, ‘◀’... - Page 30 Display Title Cause of Error Outdoor Unit Inverter Compressor1 High Discharge Outdoor Unit Inverter Compressor1 High Discharge Temperature Temperature High Pressure of Outdoor Unit High Pressure of Outdoor Unit Low Pressure of Outdoor Unit Low Pressure of Outdoor Unit Outdoor Unit Low Compression Ratio Limited Outdoor Unit Low Compression Ratio Limited Outdoor Unit Inverter Compressor CT Sensor Fault Outdoor Unit Inverter Compressor CT Sensor open or short...
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Page 31: Caution For Refrigerant Leak
CAUTION FOR REFRIGERANT LEAK - With partition and without opening which serve as passage of air to adjoining room Outdoor unit The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available. -
Page 32: Installation Guide At The Seaside
INSTALLATION GUIDE AT THE Model Designation SEASIDE Product information CAUTION • Product Name : Air conditioner • Model Name : • Air conditioners should not be installed in areas where Product Sales Name Model Factory Name corrosive gases, such as acid or alkaline gas, are produced. •...