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Refrigerant Piping Connections

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

REFRIGERANT PIPING CONNECTIONS

Outdoor Unit Connections

Single Zone Art Cool Mirror Outdoor Unit Connections

1. Remove the tubing cover by loosening the

fastening screws. See Figure 39 and 40.

2. Align the center of the refrigerant pipe and

corresponding connection as shown in

Figure 43.

3. Refer to Figure 41 and 42 for correct liquid

and gas pipe attachment onto outdoor unit.

4. Place a couple of drops of refrigerant oil on

the opening rim of the flare before assem-

bling. Ensure you do not add any contami-

nants. 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 Table 16. See Figure 43 for

correct connection points.

Figure 39: LSU090-120HSV4 Outdoor Unit

Connection Cover Removal.

Tubing Cover

Bracket for

Main Power Cables

When tightening the flare nut with a torque

wrench, ensure the direction for tightening fol-

lows the arrow on the wrench.

Table 16: Torque Wrench Tightening

Outside Diameter (inches)

Torque (lbs-ft)

1/4

13-18

3/8

24.6-30.4

1/2

39.8-47.7

5/8

45.6-59.3

Do not thread liquid or gas piping through bracket used to hold main

power cables.

Figure 41: LSU090-120HSV4 Outdoor Unit

Piping Connection.

Outdoor Unit

Gas Piping

(Larger diameter)

Liquid Piping

(Smaller diameter)

Torque Wrench

Bracket for

Main Power

Cables

Figure 40: LSU180HSV4 Outdoor Unit Connec-

tion Cover Removal.

Tubing

Cover

Terminal

Block Cover

Terminal Block

Figure 42: LSU180HSV4 Outdoor Unit Piping

Connection.

Torque wrench

Liquid side piping

(Smaller diameter)

Gas side piping

(Bigger diameter)

Outdoor unit

Figure 43: Pipe Attachment.

Summary of Contents for ART COOL LA090HSV4

Page 1: ...SINGLE ZONE ART COOL MIRROR WALL MOUNTED INSTALLATION MANUAL Single Zone Art Cool Mirror LA090HSV4 LA120HSV4 LA180HSV4 ...

Page 2: ...utions 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 property of LG Electronics U S A ...

Page 3: ...uipment 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 Install the unit considering the potential for strong winds or earthquakes Improper insta...

Page 4: ...opriate actions at the end of HVAC equipment 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 ...

Page 5: ...n industry qualified experienced certified electrician familiar with the U S National Electric Code NEC who is equipped with the proper tools and test instruments Failure to carefully read and follow all instructions in this manual can result in equipment malfunction property damage personal injury or death All electric work must be performed by a licensed electrician and conform to local building...

Page 6: ...cal injury or death Do not operate the disconnect switch with wet hands There is risk of fire electric shock 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 and the system develops a refrigerant leak it may cause fire electric shock explosion physical injury or death To avoid physical i...

Page 7: ...dling 18 Piping Support 23 Underground Piping 25 Refrigerant Piping Connections 26 Refrigerant Piping System Limitations 26 Installation Overview 26 Directional Pipe Formation 27 Drain Hose 28 Outdoor Unit Connections 29 Indoor Unit Connections 30 Bundling and Cutting Line 31 Refrigerant Piping Insulation 32 34 Air Purging 35 Leak Test Soap Method Check 36 Evacuation of Lines 37 Finishing Up 37 Re...

Page 8: ...or Units Unit Nomenclature LA N 090 HSV 4 Generation or Revision 1 First 2 Second 3 Third 4 Fourth Nominal Capacity Nominal cooling capacity in Btu h 090 091 9 000 120 121 12 000 180 181 18 000 240 24 000 300 307 30 000 360 36 000 Type N Indoor Wall Mount Unit U Outdoor Heat Pump Unit Family LA Art Cool Premier Gallery Mirror LS High Efficiency Wall Mount Standard Mega Indoor Outdoor Product HEV M...

Page 9: ...Controlled Direct Airflow Rate IDU Max H M L CFM 423 353 272 191 423 353 272 191 735 622 509 339 ODU Max CFM 1 165 1 165 2 119 Piping Liquid Line in OD 1 4 1 4 3 8 Vapor Line in OD 3 8 3 8 5 8 Condensation Line OD ID 27 32 5 8 27 32 5 8 27 32 5 8 Additional Refrigerant Charge oz ft 0 22 0 22 0 38 Pipe Length6 Minimum Maximum ft 6 6 65 6 6 6 65 6 9 84 98 4 Piping Length6 no add l refrigerant ft 41 ...

Page 10: ...a combination of R32 and R125 the required additional refrigerant must be charged in its liquid state If the refrig erant is charged in its gaseous state its composition changes and the system will not work properly R410A Refrigerant R410A refrigerant has a higher operating pressure in comparison to R22 refrigerant and therefore all piping system materials installed must have a higher resisting pr...

Page 11: ...airflow the system may malfunction 3 Remove any snow that has accumulated 3 15 16 inches or more on the top of the outdoor unit 4 Place the outdoor unit on a raised platform at least 19 11 16 inches higher than the average annual snowfall for the area In environments where there is a possibility of heavy snow the frame height must be more than two 2 times the amount of average annual snowfall and ...

Page 12: ...e than 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 may need to be applied to the outdoor unit at oceanside locations Ocean winds may cause corrosion particularly on the condenser and evaporator fins which in turn could cause product malfunction or inefficient ...

Page 13: ...eld provided snow stand at a minimum height that is equal to the average annual snowfall plus 20 inches Design the mounting base to prevent snow accumulation on the platform in front or back of the unit case If necessary provide a field fabricated hood to keep snow and ice and or drifting snow from accumulating on the coil surfaces Use inlet and discharge duct or hoods to prevent snow or rain from...

Page 14: ...nded best practices when choosing an indoor loca tion for the Single Zone Art Cool Mirror Wall Mounted indoor unit Keep unit away from any indoor steam or excessive heat No obstacles should be placed around unit Condensation drain leakage piping should be routed away from the unit Do not install near doorway Clearance gap between any wall or enclosure and the left or right side of the unit must be...

Page 15: ...t should be anchored to a strong wall to pre vent unnecessary vibration 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 injur...

Page 16: ... view of the indoor unit 2 Swing drain hose holder L bracket out and anchor as shown in Figure 15 against installation plate 3 Optionally go to Refrigerant Piping Connections section of this manual to continue with piping connections to the indoor unit 4 Optionally go to Electrical Connections section of this manual to continue with conduit electrical wiring to the indoor unit Figure 14 Mounting U...

Page 17: ...m 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 4 Carefully inspect the flared pipe end Compare the geometry with the figure to the right and dimensions as detailed in Figure 18 If the flare is defective cut it off and re do procedure If flare looks good blow clean the pipe with dry...

Page 18: ...oisture etc See Table 5 for care of piping Dry Clean Airtight Principles No moisture should be inside the piping No dust should be inside the piping No leaks should occur Problems Caused Significant hydrolysis of refrigerant oil Refrigerant oil degradation Poor insulation of the compressor System does not operate properly EEVs capillary tubes are clogged Refrigerant oil degradation Poor insulation...

Page 19: ...and other heat sensitive control components from excessive heat with a wet rag or a heat barrier spray product Refrigerant Piping System Insulation All refrigerant piping field provided isolation ball valves service valves and long radius elbows shall be completely insulated using closed cell pipe insulation The liquid and vapor lines must be insulated separately To prevent heat loss heat gain thr...

Page 20: ...dust water or other contaminants from entering the piping during installation Contaminants can cause mechanical failure Selecting Field Supplied Copper Tubing Copper is the only approved refrigerant pipe material for use with Single Zone Art Cool Mirror systems and LG recommends seamless phos phorous deoxidized ACR type copper pipe hard drawn rigid type K or L or annealed tempered copper pipe Draw...

Page 21: ...ided to allow pipe expansion to naturally occur The most common method is the inclusion of expansion Loop or U bends Each segment of pipe has a natural fixed point where no movement occurs This fixed point is located at the center point of the segment assuming the entire pipe is insulated in a similar fashion The natural fixed point of the pipe segment is typically where the expansion Loop or U be...

Page 22: ... 20 0 08 0 08 0 10 0 12 0 13 0 14 0 15 0 16 0 17 0 18 0 19 0 20 0 21 0 22 0 22 0 23 0 26 0 28 0 29 0 30 30 0 12 0 12 0 15 0 18 0 20 0 21 0 23 0 24 0 26 0 27 0 29 0 30 0 32 0 33 0 32 0 35 0 39 0 42 0 44 0 45 40 0 16 0 16 0 20 0 24 0 26 0 28 0 30 0 32 0 34 0 36 0 38 0 40 0 42 0 44 0 43 0 46 0 52 0 56 0 58 0 60 50 0 20 0 20 0 25 0 30 0 33 0 35 0 38 0 40 0 43 0 45 0 48 0 50 0 53 0 55 0 54 0 58 0 65 0 ...

Page 23: ...ted Position valves with a minimum distance of three 3 to six 6 inches of pipe on either side of the valve and placed between six 6 and twelve 12 inches from the run out pipe to the upstream main pipe If ball valves are installed closer to the indoor unit a section of pipe becomes a dead zone when the valves are closed where oil may accumulate Using Elbows Field supplied elbows are allowed as long...

Page 24: ...ght segments of pipe up to 3 4 outside diameter size Maximum of six feet 6 on center for pipe up to one inch 1 outside diameter size Maximum of eight feet 8 on center for pipe up to two inches 2 outside diameter size Wherever the pipe changes direction place pipe clamps within twelve 12 inches on one side and within twelve to nineteen 12 to 19 inches of the bend on the other side as shown in Figur...

Page 25: ... and Cable s in a Utility Conduit Table 12 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 may vary based on surrounding ambient conditions and should be calculated and specified by the design engineer 3 Insulation thickness value ...

Page 26: ...pply after carrying out a drainage test Saddle Gas side piping Liquid side piping Additional drain pipe Vinyl tape Narrow Drain Hose Base Plate Air Outlet Air Inlet Connecting cable Tubing Cover Sleeve Bushing Sleeve Putty Gum Type Sealant Bend the pipe as closely on the wall as possible but be careful that it doesn t break Installation plate Installation Overview Additional accessories parts tool...

Page 27: ...down to up 3 Secure the taped piping along the exterior wall using pipe clamps 4 Create trap above the electrical connections cover in order to prevent water from penetrating electrical components and wiring Indoor Unit Installed Below Outdoor Unit 1 Refer to Figure 35 while following the procedures below 2 Tape the piping drain hose and connection cable from down to up 3 Secure the taped piping a...

Page 28: ...e as shown in Figure 37 These methods are incorrect and can cause leakage at the indoor unit site Downward slope to outdoor for proper drainage Indoor Unit Piping Correct Drainage Slope Figure 36 Correct Slope Angle for Drain Hose Upward slope to outdoor can cause indoor leaks Water leakage Accumulated drain water Air Waving Water leakage Indoor Unit Indoor Unit Incorrect Drainage Setup Tip of dra...

Page 29: ...are nut with a torque wrench until the wrench clicks Follow torque guidelines in Table 16 See Figure 43 for correct connection points Figure 39 LSU090 120HSV4 Outdoor Unit Connection Cover Removal Tubing Cover Bracket for Main Power Cables When tightening the flare nut with a torque wrench ensure the direction for tightening fol lows the arrow on the wrench Table 16 Torque Wrench Tightening Outsid...

Page 30: ... 1 Pull the screw cap at the bottom of the indoor unit Figure 44 2 Unscrew the two 2 or three 3 screws at the bottom of the chas sis cover depends on model 3 Remove the chassis cover being careful not to scratch the main horizontal vane Figure 44 Removing Chassis Cover from Indoor Unit 4 From the rear of the indoor unit pull the tubing holder away from the unit as shown in Figure 45 5 Remove the p...

Page 31: ... placed upward Figure 47 3 Verify that rear piping house section is wrapped with vinyl tape Use a narrow type of vinyl tape for this step 4 Continue to wrap the indoor unit pipe as connected to the outdoor connection pipe as shown in Figure 48 Figure 46 Piping with Insulation Material Figure 47 Correct Cutting Line Placement Figure 48 Wrapping Connection Pipe to Indoor Unit s Pipe Figure 49 Bundli...

Page 32: ...inst the refrigeration pipe with no air space between it and the pipe Insulation passing through pipe hangers inside conduit and or sleeves must not be compressed Protect insulation inside hangers and supports with a second layer All pipe insulation exposed to direct sunlight and deterioration producing elements must be properly protected with a PVC aluminum vapor barrier jacket or alternatively p...

Page 33: ...r school etc Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene EPDM Insulation Wall Thickness Requirements 4 Special location Non Air conditioned location If conditions 1 and 2 below are present 1 When the piping passes through an indoor area where the indoor unit does not operate 2 When the humidity is high and there is no air flow in the location where the piping is installed The thick...

Page 34: ...stant caulk Fire resistant insulation When filling an access hole with mortar cover the area with steel plate so that the insulation will not fall through For this area use fire resistant materials for both the insulation and cover Vinyl cover should not be used Pipe Sleeves at Penetrations LG requires that all pipe penetrations through walls floors and pipes buried underground be properly insulat...

Page 35: ...ervice valves at the outdoor unit should be kept closed at this step 3 Set up the purging hose connections by referring to Figure 57 4 Do a Leak Test by proceeding to Soap Water Method Leak Testing section on next page Successful leak testing must be performed before Evacuation can begin 5 Go to Evacuation section on page 37 to complete the purging process Evacuation Outdoor Unit Gas side Liquid s...

Page 36: ...se the cylinder valve when the gauge reading reaches 550 psig Lo Hi Outdoor Unit Manifold Valve Charge Hose Nitrogen Gas Tank Upright Position Pressure Gauge Indoor Unit Piping Bundle Leak Test Using Nitrogen Tank To avoid nitrogen entering the refrigerant system in a liquid state the top of the cylinder must be higher than its bottom when you pressurize the system Be sure cylinder is used in a ve...

Page 37: ...troller Procedure 1 Confirm that the Lo knob of the manifold valve is open Refer back to Figure 57 2 Confirm that the Hi knob of the manifold valve is left closed 3 Run the Vacuum pump Operate pump until the system has been evacuated down to 300 microns Run pump an additional 15 minutes after reaching micron level The duration of the operation of the vacuum pump will vary accord ing to pipe length...

Page 38: ...s complete at this time and all refrigerant should be collected into the outdoor unit Perform Pump Down procedure only in the cooling mode Enabling Cooling Only Mode Before running the Pump Down procedure you must place the unit into Cooling Only Mode In order to be able to run Cooling Only Mode you must enter the unit into the Installer Mode by pressing the Reset button and the JET MODE button si...

Page 39: ...and indoor units Improperly ground wire can cause communication problems from electrical noise and motor current leakage Ground wiring must always be installed by a qualified technician If the system operates in reversed phase it may damage the com pressors and other components If there is a possibility of reversed phase phase loss momentary blackout or the power goes on and off while the system i...

Page 40: ...rminate different gauge wires to a terminal block Ring Terminal Power Wiring Connecting the Power Wiring Guidelines Best practice dictates using ring or spade terminals to terminate power wiring at the power terminal block Figure 62 If ring terminals or spade clips are not available then Do not terminate different gauge wires to the power terminal block Slack in the wiring may generate heat and fi...

Page 41: ...hould be completed without splices Terminate the cable shield to a grounded surface at the outdoor unit only Always verify the communication cable is connected to a communications terminal on the Single Zone unit Never apply line voltage power to the communication cable connection If contact is made the PCBs may be damaged The shield of the communications cable connecting the outdoor unit to the i...

Page 42: ...er the phillips screw heads as shown in Figure 64 Normally there are three 3 screws on the panel however your indoor unit model may differ 2 Using a phillips head screwdriver remove the screws from the bottom panel of the indoor unit and set aside Figure 65 3 Remove the bottom panel Figure 66 Removal is necessary to gain access to the terminal block which is situated at the bottom of most indoor u...

Page 43: ... the latches over the screws Refer back to Figure 64 as an example 8 If all other piping and electrical wiring to the outside unit has been completed at this stage you can turn the system on to test If you have not completed the piping connections do not turn power on at this time and proceed to complete all other piping along with drain hose and wiring to the system Terminal Block Connection for ...

Page 44: ...cuit Breaker Procedure Refer to Figure 70 at right for an example of how a circuit breaker should be wired through to the Single Zone Art Cool Mirror system Be sure there is no power going through the Single Zone Art Cool Mirror system before proceeding with these connections as it may result in electric shock Familiarize yourself with the location of the circuit breaker and be sure that all power...

Page 45: ...V4 Outdoor Unit Electrical Connections 180HSV4 Electrical Connections Outdoor Unit Terminal Block Over 0 2 Conduit Panel Connection Communication Cable Leading to Indoor Unit Power Cord Conduit Panel Cover 1 L1 2 L2 1 L1 2 L2 3 180HSV4 Figure 71 LSU090HSV4 120HSV4 Outdoor Unit Electrical Connec tions Figure 72 LSU180HSV4 Outdoor Unit Electrical Connections Terminal Block Connections for 180HSV4 Se...

Page 46: ...rge temperature Front outdoor coil pipe temperature Back outdoor coil pipe temperature Liquid line pipe temperature Subcooler inlet temperature Subcooler outlet temperature Average indoor unit IDU pipe temperature Inverter compressor operation indicator light Liquid injection valves operation indicator lights Hot gas bypass valve operation indicator light Four way reversing valve operation indicat...

Page 47: ...a USB to RS 485 connector kit When connected through IDU user will not be able to record data This software can be used to both commission new systems and troubleshoot existing systems LGMV data can be recorded to a CSV file and emailed to an LG representative to assist with diagnostic evaluations Recommended Minimum PC Configuration Error Codes LGMV software helps the service technician or commis...

Page 48: ...also be used with Single Zone one to one configurations such as the Single Zone Art Cool Mirror systems The Duct Free air conditioning system must run for at least 15 20 minutes before data collected by SIMs 2 0 is valid for troubleshooting You must have the free SIMs app correctly installed on your smart phone before using SIMs Some ODUs have an LGMV extension cable accessed by removing the side ...

Page 49: ...estart 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 and Fre quency graph Di...

Page 50: ...roller the Single Zone unit control board and LG Monitoring View LGMV Diagnostic Software If two or more errors occur simultaneously the lower error code number is displayed first After error is resolved the error code does not display Error Codes Decoding the Error Display The first and second number on the LED indicates error number Example 21 LED1 Green light 2x blink LED2 Red light 1x blink Er...

Page 51: ... CT Sensor Error Thermistor is disconnected or shorted out 4X 41 D Pipe Sensor INV is disconnected or shorted out 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 d...

Page 52: ...or shorted out 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...

Page 53: ...ill be mounted meets the concentration limit for the application If the refrigerant leaks and safety limits are exceeded it could result in personal injuries or death from oxygen depletion 1 American Society of Heating Refrigeration and Air Conditioning Engi neers Inc ASHRAE Atlanta GA ASHRAE Inc Information about ASHRAE Standard 15 2010 34 2010 and addenda current as of the date of this publicati...

Page 54: ...amps and hangers Brazing Practices Description Check Medical grade there are 4 available dry nitrogen for purging during brazing was used constant 3 psi while brazing Installation For more information on any procedure refer to the detail provided in the installation section Refrigerant Piping Description Check All pipe materials were properly stored capped and clean All burrs were removed after cu...

Page 55: ...ll local electrical code requirements Power wiring to the indoor unit was installed per all local electrical code requirements LG supplied cable was used between the indoor unit and its zone controller No cables were spliced and no wire caps are present Communication type RS 485 BUS type All communications cables were a minimum of 18 AWG four 4 conductor shielded and stranded with insulation mater...

Page 56: ...ision 11405 Old Roswell Road Alpharetta Georgia 30009 www lghvac com IM SZ ArtCoolMirror_HSV4 04 15 LG Customer Information Center Commercial Products 1 888 865 3026 USA Follow the prompts for commercial A C products 20001747 ISO 9001 2008 LG ELECTRONICS INC ...

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