LG Multi V Standard Gen 4 ARNU053SJA4 Installation Manual Download Page 8

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Multi V W

all-Mounted Indoor Unit

Due to our policy of continuous product innovation, some specifications may change without notification.

INTRODUCTION

Gallery and Wall-Mounted Indoor

Units

This manual describes how to install LG Art Cool™ Gallery, Stan-

dard, and Art Cool™ Mirror Wall-Mounted indoor units (IDU) for Multi

V Variable Refrigerant Flow (VRF) heat pump and heat recovery

systems. Table 1 lists the available models. Refer to LG’s Multi V

Indoor Unit Engineering Manual for complete detailed engineering

data and selection procedures.

Safety

Safety of personnel is the primary concern during all procedures.

Read and understand the safety summary at the front of this manual.

Read and understand this installation procedure before beginning

installation. Use the appropriate tools and accessories during instal-

lation. Plan your work and do not work alone, if possible. Know how

to obtain emergency medical and fire fighting assistance.
Installation Personnel
This equipment is intended for installation by personnel trained

in the required construction, mechanical, electrical, and/or other

disciplines.
Applicable Codes
Personnel must be familiar with and follow the applicable national,

state, and/or local codes. In the event of a conflict between any

applicable code and the instructions in this manual, comply with the

applicable code.

WARNING

Installation work must be performed by trained personnel and in ac-

cordance with national wiring standards and all local or other applicable

codes. Improper installation can result in fire, electric shock, physical

injury, or death and can prevent proper operation of the unit.

Note:

Please read all instructions before installing this product. Become familiar

with the unit’s components and connections, and the order of installation.

Incorrect installation can degrade or prevent proper operation.

Figure 1: Art Cool Gallery (Gen 4) Indoor Unit.

Figure 2: Standard Wall-Mounted Indoor Unit.

Figure 3: Art Cool Mirror Wall-Mounted Indoor Unit.

Summary of Contents for Multi V Standard Gen 4 ARNU053SJA4

Page 1: ...WALL MOUNTED INDOOR UNIT INSTALLATION MANUAL Art Cool Mirror Wall Mounted 5 500 to 24 200 Btu h Standard Wall Mounted 5 500 to 35 500 Btu h Art Cool Gallery 9 600 and 12 300 Btu h ...

Page 2: ...or proper installation For more technical materials such as submittals engineering databooks and catalogs visit www lghvac com For continual product development LG Electronics U S A Inc reserves the right to change specifications without notice LG Electronics U S A Inc This document as well as all reports illustrations data information and other materials are the property of LG Electronics U S A I...

Page 3: ...d trademark of LG Corp TABLE OF CONTENTS Safety Instructions 4 Introduction 8 10 Unit Nomenclature 11 R410A Refrigerant 12 General Data 13 19 Dimensions 20 23 Refrigerant Flow Diagrams 24 26 General Installation Guidelines 27 33 Mounting 34 35 Refrigerant Piping 36 41 Piping Install 42 49 Refrigerant Piping Connections 50 54 Final Install 55 58 Wiring 59 74 Controls Setup 75 81 Installation Checkl...

Page 4: ...r death Wear protective gloves when handling equipment Sharp edges may cause personal injury Dispose the packing materials safely Packing materials such as nails and other metal or wooden parts may cause puncture wounds or other injuries Tear apart and throw away plastic packaging bags so that children may not play with them and risk suffocation and death Do not install the unit in any location ex...

Page 5: ...lications This equipment is designed to provide comfort cooling and heating There is risk of property damage Do not make refrigerant substitutions Use R410A only If a different refrigerant is used or air mixes with original refrigerant the unit will malfunction and be damaged Do not install the unit in a noise sensitive area When connecting refrigerant tubing remember to allow for pipe expansion I...

Page 6: ...re to carefully read and follow all instructions in this manual can result in equipment malfunction property damage personal injury or death Ensure the unit is connected to a dedicated power source that provides adequate power If the power source capacity is inadequate or the electric work is not per formed properly it may result in fire electric shock physical injury or death Refer to local state...

Page 7: ...urely attach the electrical cover to the indoor unit Non secured covers can result in fire due to dust or water in the service panel Periodically verify the equipment mounts have not deterio rated If the base collapses the unit could fall and cause property damage or product failure Do not allow water dirt or animals to enter the unit There is risk of unit failure WARNING Do not allow water dirt o...

Page 8: ...ork and do not work alone if possible Know how to obtain emergency medical and fire fighting assistance Installation Personnel This equipment is intended for installation by personnel trained in the required construction mechanical electrical and or other disciplines Applicable Codes Personnel must be familiar with and follow the applicable national state and or local codes In the event of a confl...

Page 9: ... Five 5 Each Type B screws Two 2 Each Required Parts factory provided Required Parts field provided Connecting cable power and control Pipes vapor line and liquid line with insulation Additional drain hose Art Cool Gallery Gen 4 Indoor Units Installation guide One 1 Each Type A screws Four 4 Each Plastic anchors Four 4 Each INTRODUCTION Level JIS and other screwdrivers Electrical lineman pliers El...

Page 10: ... LG is a registered trademark of LG Corp Unit Model Number ART COOL Gallery Gen 4 ARNU093SFA4 ARNU123SFA4 Standard Gen 4 ARNU053SJA4 ARNU073SJA4 ARNU093SJA4 ARNU123SJA4 ARNU153SJA4 ARNU183SKA4 ARNU243SKA4 Standard Gen 4 ARNU303SVA4 ARNU363SVA4 ART COOL Mirror Gen 4 ARNU053SJR4 ARNU073SJR4 ARNU093SJR4 ARNU123SJR4 ARNU153SJR4 ARNU183SKR4 ARNU243SKR4 Table 1 Multi V Wall Mounted Indoor Units INTRODUC...

Page 11: ...t Refrigerant R410A Feature A C D L R Standard G Low Static U Uncased Indoor Unit Capacity Mbh Model 4 B8 Ducted high static BH Ducted high static CE Floor Standing small frame CF Floor Standing large frame L1 Ducted low static L2 Ducted low static L3 Ducted low static M2 Ducted high static M3 Ducted high static NJ Vertical Horizontal Air Handling Unit NK Vertical Horizontal Air Handling Unit SF W...

Page 12: ... systems Piping wall thickness must comply with the applicable local state and federal codes for the 551 psi design pressure of R410A Inadequate piping may fail when pressurized Refrigerant Safety ASHRAE Standards 15 2010 and 34 2010 offer guidelines that address refrigerant safety and the maximum allowable concentration of refrigerant in an occupied space Refrigerant will dissipate into the atmos...

Page 13: ...ping Liquid Line in O D 1 4 Flare 1 4 Flare Vapor Line in O D 1 2 Flare 1 2 Flare Condensate Line in I D 5 8 5 8 EEV Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national codes This unit comes with a dry nitrogen charge All capacities are net with a combination ratio between 95 105 Rated capacity is certified under AHRI Standard 1230 Ratin...

Page 14: ...x Heating H M L at Factory Default SF Frames ARNU093SFA4 187 253 0 4 15 0 3 60 208 230V 1 35 35 28 16 10 ARNU123SFA4 32 20 12 Table 3 Art Cool Mirror Wall Mounted Indoor Unit Electrical Data MCA Minimum Circuit Ampacity MOP Maximum Overcurrent Protection Units are suitable for use on an electrical system where voltage supplied to unit terminals is within the listed range limits Select wire size ba...

Page 15: ...ss Flow Cross Flow Cross Flow Cross Flow Cross Flow Quantity 1 1 1 1 1 1 1 Motor Drive Brushless Digitally Controlled Direct Airflow Rate H M L CFM 240 230 208 254 240 208 275 254 208 300 254 240 371 336 240 494 424 371 537 449 371 Piping Liquid Line in O D 1 4 Flare 1 4 Flare 1 4 Flare 1 4 Flare 1 4 Flare 1 4 Flare 3 8 Flare Vapor Line in O D 1 2 Flare 1 2 Flare 1 2 Flare 1 2 Flare 1 2 Flare 1 2 ...

Page 16: ... 0 31 0 25 30 30 12 11 9 ARNU093SJR4 0 31 0 25 30 30 13 12 9 ARNU123SJR4 0 31 0 25 30 30 15 13 11 ARNU153SJR4 0 31 0 25 30 30 23 18 11 SK Frames ARNU183SKR4 187 253 0 65 15 0 52 60 208 230V 1 53 53 32 26 16 ARNU243SKR4 0 65 0 52 53 53 39 26 16 Table 5 Art Cool Mirror Wall Mounted Indoor Unit Electrical Data MCA Minimum Circuit Ampacity MOP Maximum Overcurrent Protection Units are suitable for use ...

Page 17: ... Controlled Direct Airflow Rate H M L CFM 240 230 208 254 240 208 275 254 208 300 254 240 371 336 240 Piping Liquid Line in O D 1 4 Flare 1 4 Flare 1 4 Flare 1 4 Flare 1 4 Flare Vapor Line in O D 1 2 Flare 1 2 Flare 1 2 Flare 1 2 Flare 1 2 Flare Condensate Line in I D 5 8 5 8 5 8 5 8 5 8 EEV Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and nat...

Page 18: ... Airflow Rate H M L CFM 494 424 371 537 449 371 812 706 600 918 812 671 Piping Liquid Line in O D 1 4 Flare 3 8 Flare 3 8 Flare 3 8 Flare Vapor Line in O D 1 2 Flare 5 8 Flare 5 8 Flare 5 8 Flare Condensate Line in I D 5 8 5 8 5 8 5 8 STANDARD WALL MOUNTED General Data EEV Electronic Expansion Valve Power wiring is field supplied and must comply with the applicable local and national codes This un...

Page 19: ...NU093SJA4 0 31 0 25 30 30 13 12 9 ARNU123SJA4 0 31 0 25 30 30 15 13 11 ARNU153SJA4 0 31 0 25 30 30 23 18 11 SK Frames ARNU183SKA4 187 253 0 65 15 0 52 60 208 230 1 53 53 32 26 16 ARNU243SKA4 0 65 0 52 53 53 39 26 16 SV Frames ARNU303SVA4 187 253 0 64 15 0 51 60 208 230 1 67 0 67 0 54 43 31 ARNU363SVA4 1 02 0 81 104 0 104 0 85 51 36 Table 8 Standard Wall Mounted Indoor Unit Electrical Data MCA Mini...

Page 20: ...ffs NJ All rights reserved LG is a registered trademark of LG Corp Piping Access Hole Attachment Hole Attachment Hole 23 5 8 5 3 4 19 11 16 20 11 16 Air Outlet Grille Air Outlet Grille Air Outlet Grille Air Inlet Grille 23 5 8 Unit inches Note All measurements have a tolerance of 1 4 in ART COOLTM GALLERY External Dimensions SF Frame Figure 4 ARNU093SFA4 ARNU123SFA4 Dimensions ...

Page 21: ... 8 6 Approx 18 11 16 to vapor piping Approx 14 3 8 to liquid piping Approx 12 3 16 to drain hose 12 1 8 1 1 2 5 3 16 32 15 16 Knock Out Hole for Refrigerant Drain Piping and Power Wiring Communication Cable Drain Hose Connection Drain Hose Connection Installation Plate Terminal Block Location for Power Communication Panel Display and Remote Controller Signal Receiver Communication Line Piping Dire...

Page 22: ...or liquid piping drain hose Attaching the installation plate drilling hole Knock Out Hole for Refrigerant Drain Piping and Power Wiring Communication Cable Terminal Block Location for Power Communication Panel Knock Out Hole for Refrigerant Drain Piping and Power Wiring Communication Cable Display and Remote Controller Signal Receiver Drain Hose Connection Drain Hose Connection Communication Line ...

Page 23: ...me Figure 7 ARNU303SVA4 ARNU363SVA4 Dimensions 1 Unit must be installed in compliance with the installation manual 2 Unit must be grounded in accordance with the local regulations or applicable national codes 3 The Unit is powered from the outdoor unit Therefore power cable should be connected with the outdoor unit Note 3 2 1 Left rear piping Right rear piping 1 11 16 5 1 2 5 29 32 6 9 16 Installa...

Page 24: ...tered trademark of LG Corp ART COOLTM GALLERY Refrigerant Flow Diagram Figure 8 SF Frame Piping Diagram Thermistor Description TH1 Return air thermistor TH2 Pipe in thermistor TH3 Pipe out thermistor Table 9 SF Frame Refrigerant Pipe Connection Port Diameters Table 10 SF Frame Thermistors SF Frame Model Liquid inch Vapor inch SF Frames ARNU093SFA4 1 4 Flare 1 2 Flare ARNU123SFA4 1 4 Flare 1 2 Flar...

Page 25: ... SV Frames Table 11 SJ SK and SV Frame Refrigerant Pipe Connection Port Diameters Table 12 SJ SK and SV Frame Thermistors Model Liquid inch Vapor inch SJ Frames ARNU053SJA4 1 4 Flare 1 2 Flare ARNU073SJA4 ARNU093SJA4 ARNU123SJA4 ARNU153SJA4 SK Frames ARNU183SKA4 1 4 Flare 1 2 Flare ARNU243SKA4 3 8 Flare 5 8 Flare SV Frames ARNU303SVA4 3 8 Flare 5 8 Flare ARNU363SVA4 Heat Exchanger C F F lndoor uni...

Page 26: ...10 SJ SK Frame Piping Diagram Thermistor Description TH1 Return air and pipe in thermistor TH2 Pipe out thermistor Table 13 SJ SK Frame Refrigerant Pipe Connection Port Diameters Table 14 SJ SK Frame Thermistors SJ and SK Frames Model Liquid inch Vapor inch SJ Frames ARNU053SJR4 1 4 Flare 1 2 Flare ARNU073SJR4 ARNU093SJR4 ARNU123SJR4 ARNU153SJR4 SK Frames ARNU183SKR4 1 4 Flare 1 2 Flare ARNU243SKR...

Page 27: ...iation from other heat sources Do not install the unit in a location where acidic solution and spray sulfur are often used Do not use the unit in environments where oil steam or sulfuric gas are present Do not install additional ventilation products on the chassis of the unit Avoid installing the unit near high frequency generator sources Do not install the unit near a doorway Ensure there are no ...

Page 28: ...re explosion and physical injury or death The unit may be damaged may malfunction and or will not operate as designed if installed in any of the conditions listed Figure 11 Installing Near a Heat or Steam Source Install a ventilation fan with sufficient capacity Heat or steam source Include enough distance Indoor Unit Required Clearances for Gallery Indoor Unit See the figure on the right for requ...

Page 29: ...acement unit Before opening the shipping container check the container labeling to verify the unit received is the correct unit Verify the unit capacity type and voltage Refer to the Wall Mounted Indoor Units Nomenclature in the General Data section 1 Before opening the shipping container verify you have the correct unit 2 Place the box on a solid surface right side up 3 Cut the white reinforced n...

Page 30: ...rty damage from falling equipment Ensure the unit is properly installed Incorrectly installed units can result in degraded performance or an inoperative unit system Use a level indicator to ensure the Gallery chassis is installed on a level plane If the unit is installed near a body of water certain components are at risk of being corroded Appropriate anti corrosion methods must be taken for the u...

Page 31: ... or cut any burrs around the hole Burrs can lead to physical cuts and scrapes Note If the application calls for creating a piping hole directly through the rear wall the knockout the piping hole from the side cover might not be necessary It is recommended that the picture and front metal panels not be re attached to the indoor unit until the final test has been run which will ensure that all elect...

Page 32: ... the Gallery Indoor Unit Figure 18 Gallery Install continued Plastic Anchors 7 16 inches Plastic Anchors Hanging Hole On Back of the IDU Step 5 Installation Guide Installation Guide Step 6 Step 7 Step 8 Step 9 3 Choose rear left or right routing for the refrigerant drain con nection piping and using the installation guide drill a two 2 inch diameter hole at the appropriate location Step 4 4 Drive ...

Page 33: ...hin the wall Touching wiring can cause serious bodily injury or death Installation work must be performed by trained personnel and in accordance with all local or other applicable codes There is risk of injury to personnel from incorrect installation Note Ensure the unit is properly installed Incorrectly installed units can result in degraded performance or an inoperative unit system Mounting hard...

Page 34: ... the plate is level 3 Choose what side left or right to install the piping and then observe the left and right rear piping clearances when drilling into the wall Figure 21 Removing the Chassis Cover Left rear piping Right rear piping 1 11 16 5 1 2 5 29 32 6 9 16 Unit inches Unit Outline 6 9 16 1 11 16 SV Frame Wall Mounted Indoor Unit Figure 22 Standard Wall Mounted SV Frame Installation Plates In...

Page 35: ... When choosing a location for the wall mount plate be sure to take into consideration routing of wiring for power outlets within the wall Contacting wiring can cause serious bodily injury or death Use caution when drilling holes through the walls for the purposes of piping connections Power wiring can cause serious bodily injury or death Select the location carefully Unit must be anchored to a str...

Page 36: ...on Poor insulation of the compressor System does not operate properly Solutions Remove moisture from the piping Piping ends must remain capped until connections are complete Do not install piping on a rainy day Connect piping properly at the unit s side Remove caps only after the piping is cut the burrs are removed and after passing the piping through the walls Evacuate system to a minimum of 500 ...

Page 37: ... pipe insulation Place a second layer of insulation over the pipe insulation jacket to prevent chafing and compression of the primary insulation in the confines of the support clamp A properly installed pipe system will have sufficient supports to avoid pipes from sagging during the life of the system As necessary place supports closer for segments where potential sagging could occur Maximum spaci...

Page 38: ...pect the flared pipe end Compare the geometry with the figures and dimensions as detailed If the flare is defective cut it off and re do procedure If flare looks good blow the pipe clean with dry nitrogen Flaring Procedure Flaring and Brazing Procedures One of the main causes of refrigerant leaks is a defective connection For VRF systems the installer needs to know how to perform both flared and b...

Page 39: ...er PVE refrigeration oil only Pipe size in O D Outside Diameter mm Tightening torque ft lbs 1 4 6 35 13 0 18 0 3 8 9 52 24 6 30 4 1 2 12 7 39 8 47 7 5 8 15 88 45 4 59 3 3 4 19 05 71 5 87 5 Tightening the Flare Connections Loosening the Flare Nuts Always use two 2 wrenches to loosen the flare nuts 2 Initially hand tighten the flare nuts using three 3 or four 4 turns 3 To finish tightening the flare...

Page 40: ...iping or refrigerant oil 6 Use a tubing cutter do not use a saw to cut pipe De bur and clean all cuts before assembly 7 Brazing joints Use a dry nitrogen purge operating at a minimum pressure of three 3 psig and maintain a steady flow Use a 15 silver phosphorous copper brazing alloy to avoid overheating and produce good flow Protect isolation valves electronic expansion valves and other heat sensi...

Page 41: ...tors and heat exchangers that can easily become blocked Figure 34 Typical Refrigerant Line Flare Fitting Insulation Detail No Clearance Overlap Insulation Where the Port and the Piping Meet Insulation for Indoor Unit Port Field Supplied Insulation for Refrigerant Piping Field Supplied Insulation Clip Field Supplied Connecting the Indoor Unit Piping to the Field Installed Piping Note If the drain h...

Page 42: ...e drain hose piping and the connecting cable together and install insulation See the Pip ing Bundling and Insulating the Piping sections for instructions Note Bending in a violent right to left motion could damage the piping Bending the piping directly left or right without bending it downward first may cause damage Do not twist the piping Do not bend the piping towards the front of the unit becau...

Page 43: ...allation to the Left Side Drain pipe Connecting cable B A C Installing Piping to the Left Side SV Frame 1 Unlock the tubing clamp and route the indoor unit refrigerant piping and the drain hose to the re quired chassis access hole on the left side A 2 Pull the field drain piping and refrigerant piping and the connecting cable from the access hole in the wall 3 Guide the connection cable into the i...

Page 44: ...indoor unit Figure 43 Piping Installation to the Left Side Drain hose Connecting pipe Connecting cable Tape Drain hose Drain hose Clamp Strap Boss Screw C B A Wall Mounted Indoor Units SV Frame PIPING INSTALL Figure 44 Piping Installation to the Right Side Drain pipe Connecting cable B A C Installing Piping to the Left Side SV Frame 1 Unlock the tubing clamp and route the indoor unit refrigerant p...

Page 45: ...n model of indoor unit 3 Lift the three 3 to four 4 hinges on the bottom cover up and out of the channels molded to the left right and middle of the indoor unit Location 3 Number of hinges present depends on model of indoor unit 4 Set aside the bottom cover to re install after all procedures are complete 3 3 3 Removing the Indoor Unit Bottom Cover SJ SK Frame Wall Mounted Indoor Units SJ SK Frame ...

Page 46: ... Ensure the piping is straight Do not kink the piping this may damage the indoor unit and piping Figure 50 Back of Indoor Unit Figure 51 Bending Piping at Rear of Indoor Unit Wall Mounted Indoor Units SJ SK Frame PIPING INSTALL Right Side Piping Piping Drain Hose Holder Left Side Piping Rear Piping Figure 52 Improper Piping Bending Unfold slowly downward Bend from downward position Preparing for P...

Page 47: ...ouple of drops of refrigerant oil on outside of the flare before assembling Do not add any contaminants Tighten the flare nut initially by hand 4 Finish tightening the flare nut with a torque wrench until the wrench clicks Follow torque guidelines in the table on the next page When tightening the flare nut with a torque wrench ensure the direction for tightening follows the arrow on the wrench 5 B...

Page 48: ...refrigerant piping and corresponding con nection as shown 2 Place a couple of drops of refrigerant oil on outside of the flare before assembling Do not add any contaminants Tighten the flare nut initially by hand 3 Finish tightening the flare nut with a torque wrench until the wrench clicks Follow torque guidelines in the table below When tightening the flare nut with a torque wrench ensure the di...

Page 49: ...n connection power cable insulation into the conduit Check local state and federal codes when choosing a conduit size 3 Attach conduit using the liquid tight 3 4 inch elbow connector 4 Reassemble the indoor unit properly onto the wall bracket 5 If conduit is not used see pages in this section for refrigerant piping condensate drain power wiring communication cable bundling information 6 To protect...

Page 50: ...sh any condensation down and out When the bottom surface of the indoor unit is at an elevation below the receiving building drain line connection install an inverted trap at the top of the condensate pump discharge riser before connection to the building drain pipe When the receiving drain line is mounted horizontal connect the inverted trap to the top half of the pipe The connection point of the ...

Page 51: ...ough the structure wall to the outdoor It must slope at an angle where it is higher at the indoor unit and lower toward the outdoor area thereby letting gravity push any condensation down and out The drain hose may need to be extended so that condensate can be properly routed away The drain hose extension must be properly insulated to ensure condensation will not damage walls floors etc Foamed pol...

Page 52: ...rain Hose and Ground are Parallel Horizontal Drain Hose 6 1 2 feet Drain Hose Inserted 2 inches Less than 2 inch Gap Buried Pipe Upward slope to outdoor can cause indoor leaks Indoor Unit Indoor Unit Indoor Unit Indoor Unit Water Leak Indoor Unit Indoor Unit Water Leak Indoor Unit Water Leak Indoor Unit Water Leak Drain Hose Installed in Upward Direction Figure 62 Incorrect Slope Angles for the Dr...

Page 53: ... Standard Indoor Units and or remove Art Cool Gallery Indoor Units the picture or front panel from the indoor unit chassis A 2 Remove any filters 3 Manually set the up and down air direction louvers to the horizontal position Standard Indoor Units 4 Remove the screws that secure the front metal panel Art Cool Gal lery or front panel to the indoor unit Standard Indoor Units Pull the lower left and ...

Page 54: ...ping condensation will not damage walls floors or furniture Make sure the drain hose is positioned at the lowest side of the bundle Positioning the drain hose at the top can cause the drain pan to overflow inside the indoor unit Figure 66 Close Up of Bundling and Taping Figure 67 Example of Bundling Gallery Indoor Unit Piping Drain Hose and Connecting Cable REFRIGERANT PIPING CONNECTIONS Insulatin...

Page 55: ...pecially if a knockout hole for the piping is used 2 Verify if the drain hose and refrigerant piping is routed correctly from the side and the rear of unit 3 Route the power wiring through the indoor unit s bottom left hand groove Step 1 4 Make the connections to the communication PCB connector and to the front panel connector Step 2 5 Attach the top part of the front metal panel aligning it with ...

Page 56: ...ll Mounting the Indoor Unit to the Installation Plate 1 Attach the three 3 hooks on the top of the indoor unit to the top edge of the installation plate Verify the hooks are properly attached to the installation plate by gently shaking the indoor unit from side to side 2 To fully anchor the indoor unit to the wall push the bottom of the indoor unit against the installation plate until the bottom h...

Page 57: ... On the outside of the bottom cover securely snap the C hooks in place at each location using the heel of the palm 4 Match the snaps at the top left and right sides of the bottom cover to their sockets and push to lock the bottom cover to the indoor unit Location 3 5 Verify the bottom cover is securely installed by pushing the bot tom cover to the indoor unit at all attachment locations Figure 72 ...

Page 58: ...nd disassemble the air filter if standing on a ladder looking down at the top of the indoor unit Do not bend the air filter this damages it If the air filter is not assembled correctly dust and other sub stances will enter the indoor unit 2 Lifting the Air Filter by the Handles 3 Disassembling the Air Filter Air Filter Disassembly and Assembly Air Filter Disassembly 1 Turn power off to the system ...

Page 59: ... all instruc tions in this manual can result in equipment malfunction or property damage Consider ambient conditions temperature direct sunlight inclement weather etc when selecting installing and connecting the power wiring Properly ground all outdoor units and indoor units Ground wiring must always be installed by a qualified technician Improperly ground wire can cause communication problems fro...

Page 60: ...while servicing and to prevent external forces from damaging the terminal block Copper Wire Terminate multiple power wires of the same gauge to both sides Do not terminate two wires on one side Do not terminate different gauge wires to a terminal block Power Wiring Communication Cable Connections Best practice dictates using solderless ring or fork terminals at all power wiring and communica tion ...

Page 61: ...overcurrent protection switches and wiring in accordance with local state and NEC regulations related to electrical equipment and wiring and following the instructions in this manual Generated overcurrent will include some amount of direct current Using an oversized breaker or fuse will result in electric shock physical injury or death Use the appropriate type of overcurrent protection Generated o...

Page 62: ...units Insulation as required by NEC and local codes Rated for continuous exposure of temperatures up to 140 F Maximum allowable communication cable length is 3 281 feet HeatRecoveryUnit ForHeatRecovery SystemsOnly MasterOutdoorUnit IndoorUnit IndoorUnit IndoorUnit IndoorUnit IndoorUnit IndoorUnit WiredControllers WiredControllers WiredControllers Figure 82 Correct Master Outdoor Unit to Indoor Uni...

Page 63: ... block connections other indoor units use Molex connections See diagrams below for the two options Refer to the wiring diagram schematic found in the indoor unit itself or to the indoor unit wiring diagrams in the Engineering Manuals for more information NEVER splice cut or extend cable length with field provided cable Always include enough cable to cover distance between the indoor unit and the r...

Page 64: ... twisted stranded unshielded All wiring must com ply with all applicable local and national codes From the master indoor unit to the slave indoor unit s daisy chain using 22 AWG 3 conductor twisted stranded unshielded Do not attach wire to 12VDC terminal to the slave indoor units All wiring must comply with all applicable local and national codes For indoor units with CN REMO connections Use Group...

Page 65: ...he communica tions bus but must maintain the daisy chain and polarity configuration Failure to follow any of these power and communications wiring guidelines or instructions will cause communications errors and unit mal function Don ts Never use wire caps and never splice communications cables Never connect zone controllers or other central controllers or LG building management system gateways to ...

Page 66: ...ing the outdoor unit and heat recovery unit wiring connections or review the wiring diagrams on the applicable units Cross connecting the 3 A and 4 B terminals will cause communications errors and system malfunction Field provided communication cable between Master ODU to IDUs HRUs to be 18 AWG 2 conductor twisted stranded shielded Ensure the communication cable shield is properly grounded to the ...

Page 67: ... Mounted Indoor Units View Slide the Metal Plate Cover Indoor Unit Terminal Block L L1 N L2 3 A 4 B Indoor Power Input To Outdoor Unit Figure 89 Typical SJ and SK Frame Wiring Cable Routing WIRING Wall Mounted SJ SK Frames 1 L1 2 L2 3 A 4 B Lock nut Conduit mounting plate Conduit Power Supply 208 230V Communications High Voltage Figure 90 Simplified View of Indoor Unit Terminal Connections SJ and ...

Page 68: ...ontact Dry contact connection CN EXT1 External ON OFF controller External ON OFF controller connection CN 485 Communication Connection between indoor and outdoor units CN REMO Remote controller Remote control connection CN LEAK Refrigerant leak detector Refrigerant leak detector connection CN TH3 Float switch Float switch connection CN TH1 Return air and inlet pipe thermistor Return air and inlet ...

Page 69: ...ut for indoor controller CN MOTOR Fan motor output Motor output of BLDC CN EEV EEV output EEV control output CN U D Step motor Step motor output CN DISP2 Display Display of indoor status CN DISP1 Display Display of indoor status CN CC Dry contact Dry contact connection CN EXT1 External ON OFF controller External ON OFF controller connection CN 485 Communication Connection between indoor and outdoo...

Page 70: ...it field supplied L L1 N L2 L L1 N L2 Figure 93 Location of Power Wiring Communications Cable Terminals in SF Frame Gallery Indoor Units Location of Power Wiring Communication Cable in Art Cool Gallery SF Frame Figure 94 Simplified View of Indoor Unit Terminal Connections SF Gallery Frames Indoor Unit Terminal Block L L1 Power Input 208 230V 60 Hz 1 Phase A A B B GND 12V DRY2 DRY1 INTERNET IDU SOD...

Page 71: ...otor Step motor output CN LR1 Step motor Step motor output CN LR2 Step motor Step motor output CN REMO Wired remote controller Wired remote controller connection CN EEV EEV output EEV control output CN EXT1 External on off controller External on off controller connection CN CC Dry contact Dry contact connection CN 485 Communication Connection between indoor and outdoor units Table 21 Art Cool Gall...

Page 72: ...uit mounting plate Conduit Lock nut Conduit mounting plate Conduit 1 L 2 N Power Supply High Voltage 208 230V 3 A 4 B Communication Figure 96 Location of Power Wiring Communications Cable Terminals in SV Frame Wall Mounted Indoor Units Indoor Unit Terminal Block L L1 Power Input 208 230V 60 Hz 1 Phase A A B A B B GND 12V DRY2 DRY1 INTERNET IDU SODU Ground 3 A 4 B N L2 Outdoor Unit Terminal Block T...

Page 73: ...n Purpose Function CN POWER AC Power supply AC Power line input for indoor controller CN MOTOR Fan motor output Motor output of BLDC CN LEV EEV output EEV control output CN U D Step motor Step motor output CN DISP2 Display Display of indoor status CN DISP1 Display Display of indoor status CN CC Dry contact Dry contact line CN 485 Communication Connection between indoor and outdoor units CN REMO Re...

Page 74: ...F producing equipment Performing these actions will cause communication errors and unit malfunction WIRING Wired Controller Installation Ceiling Cassette indoor units can be used with various wired controllers optional sold separately Wired controllers include a sensor to detect room temperature To maintain comfort levels in the conditioned space the wired controller must be installed in a locatio...

Page 75: ... VRF air water source units The 3A heat recovery units will be compatible with many LG manufactured air source water source units if the its Starting Production Date the Production Starting Serial No and or the Upgrade Software Service dates fall after the dates shown below see table LG VRF systems can operate with both old 2A heat recovery units and new 3A heat recovery units if the outdoor unit ...

Page 76: ...types of indoor units can be configured in a Group Control Method 1 configuration A wireless remote controller can be used at the same time as a wired controller A dry contact and central controller can be connected at the same time to a master indoor unit only A central controller can control all indoor units in a group by controlling the master unit of the group Slave indoor units cannot be indi...

Page 77: ... Figure 101 Group Control Method 1 One Wired Remote Controller Configured as a Master for Indoor Unit Group Control CONTROLS SETUP GND Signal 12V Master Slave Slave Slave Display Error Message Only Connect Signal and GND Wires Between Indoor Units Master Dry Contact Optional ACP 5 AC Smart 5 LGAP Network System Wireless Handheld Controller MultiSITE CRC1 Group Control Method 1 Indoor Unit appearan...

Page 78: ...und Control Method 1 but controls up to 16 indoor units with the MASTER wired remote controller group control Figure 102 Group Control Method 2 Two Wired Remote Controllers One Configured as a Master and the Other as a Slave GND Signal 12V Slave Slave Donʼt connect serial 12V line Master Master Master Display Error Message Master Dry Contact Option Wireless Handheld Controller MultiSITE CRC1 Multi...

Page 79: ... Two Groups Each with a Master Wired Controller Group Control Method 3 Similar to Group Control Method 1 except fresh air units and standard indoor units must be grouped separately N M 16 because set temperatures are different CONTROLS SETUP GND Signal 12V OAU Master OAU Slave Master Slave Master Master Display Error Message Display Error Message N M Dry Contact Optional ACP 5 AC Smart 5 LGAP Netw...

Page 80: ...e connected to one indoor unit Set only one indoor unit in a group to master set the others to slave If master slave s are not set properly in a group application a malfunction will occur Set only one Simple Remote Controller to master set the others to slave All types of indoor units can be configured in a Group Control Method 4 configuration A wireless remote controller can be used at the same t...

Page 81: ...G is a registered trademark of LG Corp Figure 105 Remote Control Remote Sensor Display Error Message Master Master AC Smart ACP Bacnet ACP LON Optional Other Building Mgmt System Optional LGMV LGAP Network System GND Signal 12V Dry Contact Optional Remote Control Figure below shows an example of a remote control configuration CONTROLS SETUP Indoor Unit appearances may vary according to model ...

Page 82: ...5 of vertical If required by local code is a secondary high level condensate shutoff switch present wired properly factory provided internal high level float switch will shut down cooling operation if high water level in the pan is detected Duct Work Description Check All seams sealed no air leaks Duct work is properly sized considering the available external static pressure rating of the indoor u...

Page 83: ...ion at the terminal block Power wiring and communication cables are protected from chaffing and sharp edges at control box case and conduit pipe openings Communication cable between Master ODU to Slave ODU s and Master ODU to IDUs HRUs to be 18 AWG 2 conductor twisted stranded shielded Ensure the communication cable shield is properly grounded to the Master ODU chassis only Cable segment shields a...

Page 84: ...IM_MultiV_IV_Wall_Mounted_08_17 IM_MultiV_IV_Wall_Mounted_04_16 LG Electronics U S A Inc Air Conditioning Technologies 4300 North Point Parkway Alpharetta Georgia 30022 www lghvac com IM_MultiV_Wall_Mounted_10_19 ...

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LG Multi V Standard Gen 4 ARNU053SJA4, Installation Manual

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Summary of Contents for Multi V Standard Gen 4 ARNU053SJA4

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