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Electrical System Installation

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

©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.

ELECTRICAL SYSTEM INSTALLATION

Indoor Unit Electrical Connections

Figure 101: Terminal Block Connections for Mega 115V 

090HXV, 120HXV Indoor Units.

Terminal Block

Terminal Block

Expanded View

Grounding

Cable

Connecting Cables

Cable Restrainer

Figure 102: Reattaching the Bottom Cover.

Connecting Indoor Unit Electrical Wiring (HXV Only), continued.

5.  When done, reattach the bottom cover to the indoor unit, being careful to align 

cover using the rear tabs. Tap the cover gently with the palm of a hand to 
ensure it engages at the bottom. 
 

6.  Using a Phillips screwdriver, securely reattach the screws to the bottom cover. 

 

7.  After the screws are in place, re-snap the latches over the screws.

• Each wire must be securely attached to the terminal block.
• Ground cable must be longer than the other wires.
• Secure the cable onto the control board using a cable tie.
• Use a conduit to protect the cable / refrigerant piping from the indoor unit to the 

outdoor unit.

Position the drain hose at the bottom. Positioning the drain hose at the top of the bundle 

FDQFDXVHFRQGHQVDWHWRRYHUÀRZIURPWKHGUDLQSDQLQWKHLQVLGHRIWKHLQGRRUXQLW

 

For more information on conduits or the bundling method, see the Refrigerant Piping 

Connection section.

Summary of Contents for Mega LS120HXV

Page 1: ...Single Zone Mega LS090HEV2 LS120HEV2 LS180HEV2 LS240HEV2 Single Zone Mega 115V LS090HXV LS120HXV SINGLE ZONE MEGA AND MEGA 115V WALL MOUNTED INSTALLATION MANUAL ...

Page 2: ...on A summary list of safety precautions begins on page 3 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 ...

Page 3: ... will HQWHU WKH XQLW FDXVLQJ UH HOHFWULF VKRFN DQG SK VLFDO LQMXU RU GHDWK Always check for system refrigerant leaks after the unit has been installed or serviced Exposure to high concentration levels of refrigerant gas will lead to illness or death Wear protective gloves when handling equipment Sharp edges will cause personal injury Dispose the packing materials safely Packing materials such as n...

Page 4: ...nt life to recover recycle reclaim or destroy R410A refrigerant according to applicable U S Environmental Protection Agency EPA rules Periodically check that the outdoor frame is not damaged There is a risk of equipment damage Install the unit in a safe location where nobody can step on or fall onto it Do not install the unit on a defective stand There is risk of unit and property damage Install t...

Page 5: ...struments Failure to carefully read and follow all instructions in this manual can result in personal injury or death All electric work must be performed by a licensed electrician and conform to local building codes or in the absence of local codes with the National Electrical Code and the instructions given in this manual If the power source capacity is inadequate or the electric work is not per ...

Page 6: ...verify that the hardware securing the unit has not deteriorated If the unit falls from its installed location it can cause property damage product failure physical injury or death If gas leaks out ventilate the area before operating the unit If the unit is mounted in an enclosed low lying or poorly ventilated area DQG WKH V VWHP GHYHORSV D UHIULJHUDQW OHDN LW ZLOO FDXVH UH HOHFWULF shock explosion...

Page 7: ... 29 Refrigerant System Engineering 30 32 Flaring and Brazing Procedures 33 34 Refrigerant Piping Connections 35 47 Installation Overview 35 Special Applications 36 Outdoor Unit Connections 37 Indoor Unit Connections 38 42 Outdoor Unit Drain Piping 43 Indoor Unit Drain Hose 43 45 Bundling 45 Insulation 46 47 Electrical System Installation 48 59 Safety Guidelines 48 RQQHFWLRQV DQG 6SHFL FDWLRQV 48 5...

Page 8: ...omenclature S 180 H System Type Style SV High Efficiency Inverter VP Gallery YV Premier EV Mega V Standard Inverter T Thermostat Compatible LV Extended Piping Capacity Mbh Frame Type A Art Cool S Standard C Four Way Ceiling Cassette D Ceiling Concealed Duct Low Static H Ceiling Concealed Duct High Static V Vertical Horizontal Air Handling L LG 9 9 12 12 18 18 24 24 36 36 42 42 48 48 L EV 2 N N Ind...

Page 9: ... E Screws One 1 Bracket One 1 Wireless Controller with Holder One 1 Connecting cable power and control Pipes vapor line and liquid line with insulation Insulated drain hose Additional drain hose Level Screwdriver Electrical lineman pliers Electric drill Hole saw Drill Flaring tool set Tubing cutter Tube pipe reamer Torque wrenches Allen wrench Gas leak detector Thermometer Measuring tape Multimete...

Page 10: ... Propeller 1 Motor Drive Brushless Digital Controlled Direct Airflow Rate Indoor Unit Max H M L CFM 459 353 264 148 459 353 264 148 689 512 459 371 689 512 459 371 Outdoor Unit Max CFM 953 953 1 730 1 730 Piping Liquid Line in OD 1 4 1 4 1 4 1 4 Vapor Line in OD 3 8 3 8 1 2 1 2 Condensation Line OD ID 27 32 5 8 27 32 5 8 27 32 5 8 27 32 5 8 Additional Refrigerant Charge oz ft 0 22 0 22 0 26 0 26 P...

Page 11: ... Piping Liquid Line in OD 1 4 1 4 Vapor Line in OD 3 8 3 8 Condensation Line OD ID 27 32 5 8 27 32 5 8 Additional Refrigerant Charge oz ft 0 22 0 22 Pipe Length5 Minimum Maximum ft 6 6 49 2 6 6 49 2 Piping Length5 no add l refrigerant ft 24 6 24 6 Max Elevation Difference ft 23 23 EEV Electronic Expansion Valve IDU Indoor Unit ODU Outdoor Unit This unit comes with a dry helium charge This data is ...

Page 12: ...able Table 4 115V 60Hz 1 Phase Single Zone Single Zone Mega 115V System Electrical Data Table Nominal Tons Unit Model No Hertz Voltage Voltage Range Min to Max MCA MOP Com pressor Quantity Compressor Motor RLA Outdoor Fan Motor Indoor Fan Motor Cooling Heating W FLA W FLA 3 4 LS090HXV 60 115 104 127 13 5 20 1 10 0 10 0 43 0 4 30 0 5 1 LS120HXV 13 5 20 1 10 0 10 0 43 0 4 30 0 5 Voltage tolerance is...

Page 13: ... outdoor unit in a low lying area where water could accumulate If the outdoor unit is installed in a highly humid environment near an ocean lake etc ensure that the site is well ventilated and has a lot of natural light Example Install on a rooftop Do Not s Where it will be subjected to direct thermal radiation from other heat sources or an area that would expose the outdoor unit to heat or steam ...

Page 14: ...y install and insulate any drain hoses to prevent the hose from freezing crack ing leaking and causing unsafe conditions from frozen condensate Tie Downs and Lightning Protection Tie Downs The strength of the roof must be checked before installing the outdoor units If the installation site is prone to high winds or earthquakes when installing on the wall or roof securely anchor the mounting base u...

Page 15: ...han 150 of the outdoor unit s height There must be 2 to 3 1 2 inches of clearance between the outdoor unit and the windbreaker for purposes of air flow Additional anti corrosion treatment will need to be applied to the outdoor unit at oceanside locations Ocean winds will cause corrosion particularly on the condenser and HYDSRUDWRU QV ZKLFK LQ WXUQ FRXOG FDXVH SURGXFW PDOIXQFWLRQ RU LQHI FLHQW SHUI...

Page 16: ... 3 Standard 20 12 Minimum 14 4 Case 4 Standard 12 24 Minimum 4 8 79 Case 5 Standard 24 12 Minimum 10 4 Table 6 Single Zone Mega and Mega 115V Outdoor Unit Service Access and Allowable Clearances Diagram Legend Do not place the unit where animals and or plants will be in the path of the warm air or where the warm air and or noise will disturb neighbors If the outdoor unit is installed between stand...

Page 17: ...f a forklift is to transport the outdoor unit the forklift arms must pass through the openings at the bottom If a crane is to suspend the outdoor unit it is required that two 2 ropes at least twenty three 23 feet in length be used Pass the ropes under the unit Pass the rope through the two 2 forklift slots each at the front and rear of the outdoor unit 7R SUHYHQW GDPDJH WR WKH RXWGRRU XQLW DOZD V ...

Page 18: ...utdoor Unit to the Platform 1 Ensure that the concrete platform will not degrade easily and has enough structural strength to bear the weight of the unit 2 Include an H beam support Firmly attach the corners otherwise the support will bend 3 Use a hexagon nut 4 Use anti vibration material 5 Include enough space around the concrete foundation for con densate drainage 6 Seal all wiring and piping ac...

Page 19: ...unit near high frequency generators Figure 10 Mega Indoor Unit Clearance Requirements Ceiling Clearance inches Indoor Unit Model s 8 LSN090HEV2 LSN120HEV2 LSN180HEV2 LSN240HEV2 LSN090HXV LSN120HXV Table 8 Mega Indoor Unit Ceiling Clearance 4 100 Unit Inch mm 4 100 8 200 At least 6 1 2 feet from the floor 7KH XQLW PXVW QRW EH LQVWDOOHG ZKHUH VXOIXULF DFLG DQG ÀDPPDEOH RU FRU URVLYH JDVHV DUH JHQHUD...

Page 20: ...it 2 Align the centerline using a leveling tool Measure the wall and mark the centerline 3 Attach the installation plate to the wall following the measurements and marks Use the type A screws that are factory supplied with the plate If mounting the unit on a concrete wall use field supplied anchor bolts 4 Observe all rear piping clearances when drilling into the wall When choosing a location for t...

Page 21: ...Appear ances Will Vary Depending on Indoor Unit Model Figure 20 Steps to Removing the Bottom Cover To access the indoor unit piping port connections terminal block and to make the indoor unit installation procedure easier it is recommended that the bottom cover be removed first 1 Unsnap the bottom cover at its top left and right sides Location 1 2 Unsnap each of the three 3 or four 4 small C hooks...

Page 22: ...Figure 22 Back of Bottom Cover Completely Removed from Indoor Unit Appearances Will Vary Depending on Indoor Unit Model Figure 23 Bottom Cover with Top and Middle Unsnapped Front View Appearances Will Vary Depending on Indoor Unit Model Inside of Indoor Unit Top Left Side of Bottom Cover Figure 24 Close Up of Bottom Cover Connections Appearances Will Vary Depending on Indoor Unit Model Hinge Top S...

Page 23: ...of the indoor unit with the upper edge of the installation plate number of hooks depends on model type 3 Ensure the hooks are properly seated on the installation plate by shaking the indoor unit left and right Permanently secure the indoor unit to the wall ONLY AFTER all other tasks such as Refrigerant Piping Connections Drain Piping Connections Electrical Connections and Final Installation Proced...

Page 24: ...e L bracket closed and secure the indoor unit to the LQVWDOODWLRQ SODWH DV GHWDLOHG LQ 6WHSV DQG LQ 0RXQWLQJ WKH QGRRU 8QLW WR WKH QVWDOODWLRQ 3ODWH 1 To prepare the indoor unit for piping and electrical installation disengage bottom on indoor unit from installation plate by reversing Steps 6 5 and 4 from the previous procedure if those procedures have been performed 2 Unsnap the piping drain hose...

Page 25: ...of one outdoor unit and one indoor unit One of the most critical elements of a single zone system is the refrigerant piping If the connection piping is not within allowable limits there will be reliability performance noise and vibration issues The table below lists pipe length limits that must be followed in the design of a Single Zone Mega or Mega 115V refrigerant pipe system Refer to the figure...

Page 26: ...hs H58 Temper Coils O60 Temper Table 11 ACR Rated Copper Tubing Material OD in 1 4 3 8 1 2 5 8 3 4 7 8 1 1 8 1 3 8 1 5 8 Material Rigid or Soft ACR Rated for R410A Rigid or Solid ACR Rated for R410A Min Bend Radius in 0 563 0 9375 1 5 2 25 3 0 3 0 3 5 4 0 4 5 Min Wall Thickness in 0 03 0 03 0 03 0 03 0 03 0 03 0 03 0 04 0 050 Table 12 ACR Copper Tubing Dimensions and Physical Characteristics1 3 No...

Page 27: ... same for the maximum pipe temperature 3 Calculate the difference in the two expansion distance values The result will be the anticipated change in pipe length General Example A system is installed and the design shows that there is a 100 foot straight segment of tubing between an indoor unit and the outdoor unit In heating this pipe transports hot gas vapor to the indoor units at 120 F In cooling...

Page 28: ... 95 1 00 1 05 1 10 1 08 1 15 1 30 1 40 1 45 1 50 120 0 48 0 48 0 60 0 72 0 78 0 84 0 90 0 96 1 02 1 08 1 14 1 20 1 26 1 32 1 30 1 38 1 56 1 68 1 74 1 80 140 0 56 0 56 0 70 0 84 0 91 0 98 1 05 1 12 1 19 1 26 1 33 1 40 1 47 1 54 1 51 1 61 1 82 1 96 2 03 2 10 160 0 64 0 64 0 80 0 96 1 04 1 12 1 20 1 28 1 36 1 44 1 52 1 60 1 68 1 76 1 73 1 84 2 08 2 24 2 32 2 40 180 0 72 0 72 0 90 1 08 1 17 1 26 1 35 ...

Page 29: ...ant oil degradation Poor insulation of the compressor System does not operate properly Solutions Remove moisture from the piping Piping ends should 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 t...

Page 30: ...ated into the total and segment equivalent piping lengths and compared to product design limitations In all cases materials must be suitable for the application and any applicable codes including but not limited to diameter and wall thick ness continuity per ACR standards Failure to do so will cause significant performance degradation Proper leak checks must be performed Using isolation valves doe...

Page 31: ... hangers and insulation Field provided pipe supports must be designed to meet local codes If allowed by code use fiber straps or split ring hangers suspended from the ceiling on all thread rods fiber straps or split ring hangers can be used as long as they do not compress the pipe insulation Place a second layer of insulation over the pipe insulation jacket to prevent chafing and compression of th...

Page 32: ...igerant pipe must be located at a level below the frost line Table 16 Utility Conduit Sizes 1 OD pipe diameter in inches Values in parenthesis indicate OD of pipe with insulation jacket 2 Diameter of pipe with insulation Thickness of pipe insulation is typical Actual required thickness will vary based on surrounding ambient conditions and must be calculated and specified by the design engineer 3 I...

Page 33: ... 45 flare when working with R410A 1 Cut the pipe to length Measure the distance between the indoor unit and the outdoor unit Cut the pipes a little longer than measured distance 2A Remove the burrs Completely remove all burrs from pipe ends When removing burrs point the end of the copper pipe down to avoid introducing foreign materials in the pipe 2B Slide the flare nut onto the copper tube 90 Sla...

Page 34: ...small orifices electronic expansion valves oil separators and heat exchangers that can easily become blocked Proper system operation depends on the installer using best practices and utmost care while assembling the piping system 2 Store pipe stock in a dry place keep stored pipe capped and clean 3 Blow clean all pipe sections with dry nitrogen prior to assembly 4 Always use a non oxidizing materi...

Page 35: ...s section for spe cific length limitations in conjunction with outdoor unit and indoor unit positioning When proceeding with piping connections adhere to pipe support spacing lengths as shown in the General Refrigerant Piping System Information section Refer WR WKH 3LSH 6XSSRUWV VHFWLRQ IRU LQIRUPDWLRQ RQ using clamps and pipe support materials Always adhere to local codes regarding piping and acc...

Page 36: ...wall that are around the piping When the Outdoor Unit is Installed Above the Indoor Unit 1 Use a conduit piping set cover or bundle the separately insulated refrigerant piping and the communications connection power cable together up to the outdoor unit service valves 2 Make sure to include some slack in the wiring Wiring must be installed in upwards direction to prevent water from traveling into ...

Page 37: ...r to the figures below for liquid and gas vapor piping attachments onto the outdoor unit 4 Place a couple of drops of PVE refrigerant oil on outside of the flare before assembling Do not add any contaminants Tighten the flare nut initially by hand 5 Finish tightening the flare nut with a torque wrench until the wrench clicks Follow torque guidelines in the table below See figures for correct conne...

Page 38: ...ation procedure easier it is recommended that the bottom cover be removed first 1 On the bottom cover of the indoor unit unsnap the latches that hide the screws Normally there are two 2 to three 3 screws on the panel however models may differ 2 Using a Phillips head screwdriver remove the screws from the bottom cover of the indoor unit and set aside 3 Remove the cover taking care not to scratch th...

Page 39: ...ending it slowly downward first Figure 47 Properly Bending the Piping at Rear of Indoor Unit Unfold slowly downward Bend from downward position Do not bend the piping directly backwards or to the left or right sides without bending it downward first this will damage the indoor unit piping Do not forcibly press the refrigerant piping onto the bottom frame or the front grille this will damage the in...

Page 40: ...y unfolding and bending the piping slowly downward first as shown then to the left or right pre chosen following installation guidelines and application needs as shown Secure piping with the piping holder Figure 52 Propping Open the Piping Drain Hose Holder L bracket Figure 53 Back of Indoor Unit Figure 54 Bending Piping at Rear of Indoor Unit To access the indoor unit piping port connections and ...

Page 41: ...ete before starting the piping connec tions 1 Insert drain hose on left feature will differ depending on model of indoor unit 2 Align the center of the refrigerant piping and corresponding con nection as shown on the next page 3 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 4 Finish tightenin...

Page 42: ...ield Installed Piping Pipe Size in O D Outside Diameter mm 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 Table 19 Torque Wrench Tightening Figure 58 Indoor Unit Connection Piping Installation When Piping is on the Right Side HEV2 Only See the Electrical System Installation section for information on how to connect the communication c...

Page 43: ...per installation and the position of the drain hose along the refrigerant piping installation path to avoid leaks After the drain hose is set in place always follow with leak pressure testing and deep evacuation procedures of the refrigerant piping to be sure all refrigerant piping is properly installed Re check and retest as necessary Drain hose is routed from the indoor unit through the structur...

Page 44: ...pplied drain pipe 2 inches Drain Hose Interior Wall Vinyl Chloride Drain Pipe Exterior Wall Accumulated drain water Tip of Drain Hose In Container Tip of Drain Hose Pointing Up Tip of Drain Hose In Water Air Kinks Water Leak Water Leak Ditch Less than 2 inch Gap Between Bottom of Drain Hose and Ground Water Leak No rainwater trap Drain Hose and Ground are Parallel Horizontal Drain Hose 6 1 2 feet ...

Page 45: ...on piping insulation material and the indoor unit piping insulation material 2 Bind together the two pipes using vinyl tape Make sure there are no gaps during the binding 3 Be sure the cutting line is placed upward 4 Wrap the rear piping section with narrow vinyl tape 5 Continue to wrap the indoor unit pipe as connected to the outdoor connection pipe 6 Using a wider vinyl tape bundle the piping an...

Page 46: ...irements for Ethylene Propylene Diene Methylene EPDM insulation Inside the outdoor unit maximum pipe temperature is 248 F and minimum pipe temperature is 40 F For field insulation of refrigerant piping between outdoor units and indoor units consider the following pipe temperature ranges for an operating heat pump system Heating mode refrigerant temperature ranges Liquid 75 118 F High Pressure Vapo...

Page 47: ...es 1 2 inches 1 2 inches Vapor pipe ø3 8 inch 1 2 inches 3 4 inches 3 4 inches 1 inch ø1 2 inch ø5 8 inch ø3 4 inch ø7 8 inch ø1 inch ø1 1 8 inches 3 4 inches ø1 1 4 inches 1 inch 1 inch ø1 3 8 inches ø1 1 2 inches ø1 3 4 inches Table 20 Minimum Refrigerant Pipe EPDM Insulation Wall Thickness Requirements 1 Do not insulate gas and liquid pipes together as this can result in pipe leakage and malfun...

Page 48: ...eath Do not connect ground wire to refrigerant gas or water piping to lightning rods to telephone ground wiring or to the building plumb ing system Failure to properly provide a NEC approved earth ground can result in electric shock fire physical injury or death Consider ambient conditions temperature direct sunlight inclement weather etc when selecting installing and connecting the power wiring P...

Page 49: ...ions demonstrated in the figures below Never apply line voltage power to the communications cable terminal block If contact is made the PCBs will be damaged Always include some allowance in the wiring length when terminating Firmly attach the wiring or cable but provide some slack to facilitate removing the electrical panels while servicing and to prevent external forces from damaging the terminal...

Page 50: ...at and or cause a fire resulting in physical injury or death 8VH KHDW SURRI HOHFWULFDO ZLUH FDSDEOH RI ZLWKVWDQGLQJ WHPSHUDWXUHV XS WR WR DYRLG ZLULQJ PDOIXQFWLRQ DQG HOHFWULFDO VKRFN ZKLFK ZLOO cause physical injury or death Install appropriately sized breakers fuses overcurrent protection switches and wiring in accordance with local state and NEC regulation related to electrical equipment and wi...

Page 51: ...he Single Zone outdoor unit and the indoor unit for lengths up to 130 feet use a minimum 18 gauge four 4 conductor stranded shielded or unshielded wire If shielded the wire must be grounded to the chassis at the outdoor unit only When the communication connection power wires between the indoor unit and outdoor unit is GREATER THAN 130 feet use A two 2 conductor wire for power A two 2 conductor wir...

Page 52: ...y 1 L1 Power L 2 L2 Neutral N G Ground Power Flow L ĺ N Diagram is an example of communication and power cables when the wiring is GREATER THAN 130 feet Terminals may be labeled differently depending on the model Outdoor and Indoor Unit appearances may vary depending on the model Communication Flow Comm ĺ N 3 Communications GREATER THAN 130 feet Must Separate Communications and Ground G Cable from...

Page 53: ...eering Manual or contact an LG representative for more information can connect to the Single Zone Mega 115V Wall Mount indoor unit in one of two different ways 1 LG Wired Remote Extension Cable with Molex plug PZCWRC1 sold separately that connects to the CN REMO terminal on the indoor unit PCB 2 Field supplied controller cable that connects to the indoor unit terminal block must be at least UL2547...

Page 54: ...nit along with the terminal numbers match those for the indoor unit Images are representative actual appearance will vary Refer to the circuit diagram on the indoor unit 1 On the bottom cover of the indoor unit unsnap the latches that hide the screws Normally there are three 3 screws on the panel however models may differ 2 Using a Phillips head screwdriver remove the screws from the bottom cover ...

Page 55: ...e indoor unit being careful to align cover using the rear tabs Tap the cover gently with the palm of a hand to ensure it engages at the bottom 6 Using a Phillips screwdriver securely reattach the screws to the bottom cover 7 After the screws are in place re snap the latches over the screws Each wire must be securely attached to the terminal block Ground cable must be longer than the other wires Se...

Page 56: ...on 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 5 Terminal block is located at the front bottom right hand side of the indoor unit To access the terminals unscrew the metal control cover screw if applicable and raise the metal control cover 6 Using a JIS screwdriver connect the cable terminals to the termina...

Page 57: ...he indoor unit Connect the terminals to the terminal block Secure the cable onto the terminal block with the cable retainer Secure the refrigerant piping drain hose and communication connection power cable together using cable ties and conduit or by the bundling method Each wire must be securely attached to the terminal block Ground cable must be longer than the other wires Secure the cable onto t...

Page 58: ...chassis to be sure they are secure and have not loosen during transportation and installation of the outdoor unit Inspect wires for damage or cracks Loose damaged or cracked wires will cause electric shock bodily injury and or death Loose wires can cause the wiring to burn out damaging the outdoor unit 3 Confirm that electrical power supply capacity will be sufficient to run the unit Verify that a...

Page 59: ...he inside of its chassis cover Each wire must be individually and securely attached to each terminal Loose damaged or cracked wires will cause electric shock bodily injury and or death Loose wires can cause the wiring to burn out damaging the outdoor unit Secure wiring cables with cable ties Pay attention to the location connection of the ground cable Maintain a minimum of 1 4 inches of wire lengt...

Page 60: ... not be pressured to more than 550 psi Pressures greater than 550 psi will damage the piping system and cause unit malfunction Triple Leak Pressure Check Procedure 1 After the refrigerant piping installation is complete open the isolation ball valves if any that will have been included in the piping system 2 Verify that both the liquid and gas vapor suction line outdoor unit service ports are clos...

Page 61: ...ust be found Remove the bubble solution with a clean cloth repair the leak s and perform the leak pressure check again 9 After the system has been thoroughly tested and no leaks are found depressurize by loosening the charging hose connector at the nitro gen cylinder regulator When system pressure returns to normal completely disconnect the charging hose from the cylinder and release the nitrogen ...

Page 62: ...tion must be performed through the gas vapor suction Schrader port on the outdoor unit service port The deep evacuation procedure is required for Single Zone systems The triple evacuation procedure is a best practices recommendation for Single Zone systems For faster evacuation the Schrader core can be removed and an auxiliary service port can used Make sure to re install the original Schrader cor...

Page 63: ...LQXWHV If the micron level DOES NOT stop rising there is a leak and the leak test must be performed again If the micron level DOES rise above 2 000 micron re open the manifold gauges and the vacuum pump valve and continue evacuation back down to 2 000 micron level If the micron level holds at 2 000 micron continue to step 4 4 Break vacuum with 50 psig nitrogen purge for an appropriate amount of ti...

Page 64: ...ation X g Refrigerant Pipe Length No Charge Pipe Length Additional Refrigerant 7KHUH LV QR QHHG WR DGG UHIULJHUDQW LI HTXLYDOHQW SLSH LV OHVV WKDQ WKH SLSLQJ OHQJWK ZLWK QR DGGLWLRQDO UHIULJHUDQW LQ WKH WDEOH DERYH Finishing the Job After the Triple Leak and Evacuation and refrigerant trim charge if any procedures have been performed follow the steps below to open the refrigerant lines 1 Verify th...

Page 65: ...wer OFF to the system 2 Align the bottom cover to the indoor unit using the rear tabs Tap the cover gently with the palm of a hand to ensure it engages at the bottom 3 Using a Phillips screwdriver securely reattach the screws to the bottom panel 4 After the screws are in place re snap the latches over the screws Figure 118 Aligning the Bottom Cover Cover Figure 119 Reattaching the Bottom Cover Rea...

Page 66: ...sent depends on model of indoor unit 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...

Page 67: ...r to assemble and 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 substances will enter the indoor unit 2 Lifting the Air Filter by the Handles 3 Disassembling the Air Filter Air Filter Disassembly and Assembly HEV2 Only Air Filter Disassembly 1 Turn ...

Page 68: ...f the gas vapor suction service valve See optimum psig in table at right 2 Measure the air temperature from both the inlets and outlets 3 Verify the difference between the inlet and outlet temperatures is 14 4 F 4 The air conditioner is now ready to use Outside Ambient Temperature Gas Vapor Service Valve Pressure 95 F 120 135 psig Test Run After all installation procedures are complete the system ...

Page 69: ...ely OFF All Installer code numbers must be entered when system is OFF WLAN Module s communication time will lag by about one 1 minute after unit is turned back on and in normal operating mode Entire lock or Mode lock cannot be set if heating or automatic operation is set through a central controller Disabling Cooling Only Mode After Pump Down procedure has been performed Cooling Only mode will nee...

Page 70: ...ace the unit into Cooling Only mode 1 Turn off the unit s power switch Connect a low pressure gauge manifold hose to the charge port on the gas vapor suction service valve 2 Open the gas vapor suction service valve halfway and purge the air in the manifold hose using the refrigerant 3 Fully close the liquid piping service valve 4 Turn on the unit s power switch and start the Cooling Only mode oper...

Page 71: ...d the inverter air conditioning operation cycle the meaning of the data displayed by SIMs and how to use the data to troubleshoot the system The Duct Free System air conditioning system must run for at least 15 20 minutes before data collected by SIMs is valid for trouble shooting The free SIMs app must be correctly installed on the smart phone before using SIMs Some outdoor units have an LGMV ext...

Page 72: ...ent Voltage EEV Mode Restart Timer Comp Mode EEV Indoor Info Tab Displays the following information Frequency Operation THM Mode REM Mode FAN EEV Air Temp Pipe in Pipe mid Pipe out Graph Info Tab This tab has three sub sections IDU Indoor Unit Temperature graph Displays IDU informa tion in graph format In formation displayed is for the IDU selected on the Main screen ODU Outdoor Unit Temperature a...

Page 73: ...ptional 4X 5 Communication error between indoor unit and outdoor unit 5X 6 Indoor unit outlet pipe sensor error 6X 9 Indoor unit EEPROM error 9X 10 Indoor unit BLDC motor fan lock 1X 12 Indoor unit middle pipe sensor error 2X 1X 21 DC Peak IPM Fault Compressor DC voltage was too high 2X 1X 22 Current Transformer2 CT2 error Alternating current AC input too high 2X 2X 23 DC Link Low Volt 2X 3X 25 AC...

Page 74: ...t 4X 1X 44 Outdoor Air Sensor is disconnected or shorted out 4X 4X 45 Middle thermistor of outdoor unit condenser coil is disconnected or shorted out 4X 5X 46 Outdoor unit suction line thermistor is disconnected or shorted out 4X 6X 48 Outdoor unit coil outlet liquid line thermistor is disconnected or shorted out 4X 8X 53 Communication failure from outdoor unit to indoor unit 5X 3X 60 Outdoor unit...

Page 75: ...AC and DC converter circuit too high 2X 7X 28 Inverter compressor DC voltage is too high 2X 8X 29 Inverter compressor amperage is too high 2X 9X 31 Current to current transformer CT thermistor is too low 3X 1X 32 Inverter Compressor Discharge Pipe D Pipe Overheat 3X 2X 40 CT Sensor Error Thermistor is disconnected or shorted out 4X 41 D Pipe Sensor INV is disconnected or shorted out 4X 1X 44 Outdo...

Page 76: ...Comp Position Error not providing rotation Locking 2X 6X 27 PSC Fault Current to inverter compressor between AC and DC converter circuit too high 2X 7X 28 Inverter compressor DC voltage is too high 2X 8X 29 Inverter compressor amperage is too high 2X 9X 31 Current to current transformer CT thermistor is too low 3X 1X 32 Inverter Compressor Discharge Pipe D Pipe Overheat 3X 2X 40 CT Sensor Error Th...

Page 77: ...SHRAE Atlanta GA ASHRAE Inc Information about ASHRAE Standard 15 2010 34 2010 and addenda current as of the date of this publication Take appropriate actions at the end of HVAC equipment life to recover recycle reclaim or destroy R410A refrigerant according to applicable US EPA rules Total System Refrigerant Charge To calculate the potential refrigerant concentration level RCL 1 Measure the occupi...

Page 78: ...es were present Optional High quality R 410A rated full port ball valves Schrader between the valve body and the indoor units used at the indoor unit and at will in the refrigerant piping Condensate Pump Drain Installation Description Check Condensate drain installed on indoor units Extended condensate piping material used is acceptable under local code Insulated to prevent condensation Indoor uni...

Page 79: ... Conditioning Technologies 4300 North Point Parkway Alpharetta Georgia 30022 www lghvac com IM_SZ_Mega_Mega115V_HEV2_HXV_06_19 Supersedes IM_WallMounted_All_11_15 IM_WallMounted_All_08_15 20001747 ISO 9001 2008 LG ELECTRONICS INC ...

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