LG Mega LS090HEV2 Engineering Manual
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LG Mega LS090HEV2 Engineering Manual

Single zone mega and mega 115v wall mounted
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SINGLE ZONE MEGA AND MEGA 115V
3/4, 1, 1-1/2, and 2 Tons
Mega Models:
LS090HEV2
LS180HEV2
LS120HEV2
LS240HEV2
WALL MOUNTED
ENGINEERING MANUAL
3/4 and 1 Tons
Mega 115V Models:
LS090HXV
LS120HXV

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Summary of Contents for LG Mega LS090HEV2

  • Page 1 SINGLE ZONE MEGA AND MEGA 115V WALL MOUNTED ENGINEERING MANUAL 3/4, 1, 1-1/2, and 2 Tons 3/4 and 1 Tons Mega Models: LS090HEV2 LS180HEV2 Mega 115V Models: LS120HEV2 LS240HEV2 LS090HXV LS120HXV...
  • Page 2 A summary list of safety precautions is on page 4. For more technical materials such as submittals, catalogs, installation, owner’s, and service manuals, 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.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Unit Nomenclature...........................................4 LG Air Conditioner Technical Solution (LATS)................................5-6 Mega and Mega 115V Product Data...................................7-48 Mechanical Specifications......................................8 General Data.........................................9 Electrical Data..........................................12 Functions, Controls, Options......................................13 Outdoor Unit Dimensions......................................14-17 Indoor Unit Dimensions......................................18-20 Acoustic Data ........................................21-26 Refrigerant Flow Diagrams....................................27-28 Wiring Diagrams--Indoor Units....................................29-30 Wiring Diagrams--Outdoor Units....................................31-33...

  • Page 4: Unit Nomenclature

    UNIT NOMENCLATURE Single Zone Wall Mount Indoor and Outdoor Units Family LA= Art Cool Premier / Gallery / Mirror LS= High Efficiency Wall Mount / Standard / Mega Type N = Indoor Wall Mount Unit U = Outdoor Heat Pump Unit Nominal Capacity (Nominal cooling capacity in Btu/h) 090 = 9,000...

  • Page 5: Lg Air Conditioner Technical Solution (Lats)

    Contact your LG Rep for the best software program for your application. To reduce the risk of designing an improper applied system or one that will not operate correctly, LG requires that LATS software be used on all projects.
  • Page 6 LATS can generate an Excel GERP report that can imported into the LG SOPS pricing and ordering system.
  • Page 7 PRODUCT DATA Mechanical Specifications on page 8 General Data on page 9 Electrical Data on page 12 Functions, Controls, Options on page 13 Outdoor Unit Dimensions on page 14 Indoor Unit Dimensions on page 18 Acoustic Data on page 21 Refrigerant Flow Diagrams on page 27 Wiring Diagrams—Indoor Units on page 29 Wiring Diagrams—Outdoor Units on page 31...

  • Page 8: Mechanical Specifications

    General mulator, four-way reversing valve, EEV, high and low side charging ports, service valves, LG Single Zone Mega Wall Mounted systems and interconnecting piping. comprise of a single outdoor unit connected to a single indoor unit with a single refriger- ant circuit.

  • Page 9: General Data

    GENERAL DATA Mega Pairing Table The following table shows the available outdoor and indoor unit, along with the factory provided controller. Table 1: Single Zone Mega and Mega 115V Pairing Table Outdoor Unit Model Indoor Unit Model Controller Mega Inverter LSU090HEV2 LSN090HEV2 AKB74955602...
  • Page 10 GENERAL DATA Table 2: LS090HEV2 LS120HEV2 LS180HEV2 LS240HEV2 System Model Number (IDU/ODU) (LSN090HEV2/ (LSN120HEV2/ (LSN180HEV2/ (LSN240HEV2/ LSU090HEV2) LSU120HEV2) LSU180HEV2) LSU240HEV2) Cooling Capacity (Min/Rated/Max) (Btu/h) 3,070 ~ 9,000 ~10,330 3,070 ~ 12,000 ~ 13,780 3,685 ~ 18,000 ~ 18,493 3,685 ~ 22,000 ~ 24,000 Cooling Power Input (kW) 0.72...
  • Page 11 GENERAL DATA Table 3: System Model Number (IDU/ODU) LS090HXV (LSN090HXV/LSU090HXV) LS120HXV (LSN120HXV/LSU120HXV) Cooling Capacity (Min/Rated/Max) (Btu/h) 1,023 ~ 8,500 ~ 13,785 1,023 ~ 12,000 ~ 13,785 Cooling Power Input (kW) 0.71 1.14 Heating Capacity (Min/Rated/Max) (Btu/h) 1,023 ~ 10,900 ~ 22,178 1,023 ~ 13,000 ~ 22,178 Heating Power Input (kW)

  • Page 12: Electrical Data

    ELECTRICAL DATA Electrical Data Table 4: 208-230V, 60Hz, 1-Phase Single-Zone Mega System Electrical Data Table. Compressor Motor Outdoor Fan Motor Indoor Fan Motor Nominal Unit Model Voltage Range Compressor Hertz Voltage Tons (Min. to Max.) Quantity Cooling Heating LS090HEV2 10.0 LS120HEV2 10.0 208 - 230...

  • Page 13: Functions, Controls, Options

    Dry contact Central control (LGAP) PI 485 Zone control CTIE Electro thermostat Wi-Fi Module (Option) Water level sensor connection (for optional AG-9300-LG) Wind baffle kit Mode Lock Cooling Only or Heating Only Temperature Control Thermistor Smart Inverter Monitoring System (SIMS) Primary washable filters.

  • Page 14: Outdoor Unit Dimensions

    OUTDOOR UNIT DIMENSIONS LSU090HEV2, LSU120HEV2 14 | PRODUCT DATA ©...
  • Page 15 OUTDOOR UNIT DIMENSIONS LSU180HEV2, LSU240HEV2 PRODUCT DATA | 15 ©...
  • Page 16 OUTDOOR UNIT CORNER WEIGHT AND CENTER OF GRAVITY DIMENSIONS Figure 3: LSU090-120-180-240HEV2 Outdoor Unit Corner Weight and Center of Gravity Dimensions. Table 7: LSU090-120-180-240HEV2 Outdoor Unit Corner Weight and Center of Gravity Dimensions. Weight (lb.) Center of Gravity (Inch) Leg (Inch) Corner Weight (lb.) Model No.
  • Page 17 OUTDOOR UNIT DIMENSIONS LSU090HXV, LSU120HXV 28-1/4 18-1/4 Discharge Air Grille Gas Pipe Connection Port Liquid Pipe Connection Port 2-1/4 Control Box Ground Terminal 28-1/4 10-9/16 Unit: Inch PRODUCT DATA | 17 ©...

  • Page 18: Indoor Unit Dimensions

    INDOOR UNIT DIMENSIONS LSN090HEV2, LSN120HEV2 18 | PRODUCT DATA ©...
  • Page 19 INDOOR UNIT DIMENSIONS LSN180HEV2, LSN240HEV2 PRODUCT DATA | 19 ©...
  • Page 20 INDOOR UNIT DIMENSIONS LSN090HXV, LSN120HXV 8-5/16 34-7/8 15/16 Return Air Grille 2-5/16 for piping and cable 6-5/16 Place a level on raised tab Unit Outline 17-7/16 17-7/16 Ø 2-13/16 Ø2-13/16 Installation Plate Left rear Right rear piping piping 3-3/4 5-1/4 6-15/16 8-9/16 Unit: Inch...

  • Page 21: Acoustic Data

    ACOUSTIC DATA Indoor Unit Sound Pressure Measurement / Sound Pressure Levels • Measurements are taken 3.3 ft away from the front of the unit. Figure 4: Mega Indoor Unit Sound Level Measurement. • Sound pressure levels are measured in dB(A) with a tolerance of ±1.
  • Page 22 ACOUSTIC DATA LSN120HEV2 and LSN180HEV2 Sound Pressure Levels Figure 6: Sound Pressure Levels for Mega LSN120HEV2 Indoor Units. LSN120HEV2 Cooling Heating High High Middle Middle NC-65 NC-65 NC-60 NC-60 NC-55 NC-55 NC-50 NC-50 NC-45 NC-45 NC-40 NC-40 NC-35 NC-35 NC-30 NC-30 NC-25 NC-25...
  • Page 23 ACOUSTIC DATA LSN240HEV2 Sound Pressure Levels Figure 8: Sound Pressure Levels for Mega LSN180HEV2 Indoor Units. LSN240HEV2 Cooling Heating High High Middle Middle NC-65 NC-65 NC-60 NC-60 NC-55 NC-55 NC-50 NC-50 NC-45 NC-45 NC-40 NC-40 NC-35 NC-35 NC-30 NC-30 NC-25 NC-25 Approximate Approximate...
  • Page 24 ACOUSTIC DATA Outdoor Unit Sound Pressure Measurement / Sound Pressure Levels Figure 10: Outdoor Unit Sound Levels • Measurements are taken 3.3 ft away from the front of the unit. • Sound pressure levels are measured in dB(A) with a tolerance of ±1.
  • Page 25 ACOUSTIC DATA LSU120HEV2 and LSU180HEV2 Sound Pressure Levels Figure 12: Sound Pressure Levels for Mega LSU120HEV2 Outdoor Units. LSU120HEV2 Cooling Heating Front Front Back Back NC-65 NC-65 NC-60 NC-60 NC-55 NC-55 NC-50 NC-50 NC-45 NC-45 NC-40 NC-40 NC-35 NC-35 NC-30 NC-30 NC-25 NC-25...

  • Page 26: Acoustic Data

    ACOUSTIC DATA LSU240HEV2 Sound Pressure Levels Figure 14: Sound Pressure Levels for Mega LSU240HEV2 Outdoor Units. LSU240HEV2 Cooling Heating Front Front Back Back NC-65 NC-65 NC-60 NC-60 NC-55 NC-55 NC-50 NC-50 NC-45 NC-45 NC-40 NC-40 NC-35 NC-35 NC-30 NC-30 NC-25 NC-25 Approximate Approximate...

  • Page 27: Refrigerant Flow Diagrams

    REFRIGERANT FLOW DIAGRAMS Mega LSN / LSU090, 120, 180, 240HEV2 Refrigerant Flow Diagram for Mega LSN / LSU090, 120, 180, 240HEV2 Indoor Unit Outdoor Unit Field Pipin g 2-Way Valve (Copper Tubing) Liquid Side Flare Strainer Strainer Joint (Electronic Expansion Valve) Propeller Heat...

  • Page 28: Refrigerant Flow Diagrams

    REFRIGERANT FLOW DIAGRAMS Mega 115V LSN / LSU090, 120HXV Refrigerant Flow Diagram for Mega 115 LSN / LSU090, 120HXV Liquid Side FIELD PIPING (Ø1/4" Copper Tubing) 2-Way Valve Heat Heat Exchanger Exchanger (Evaporator ) (Condenser) Vapor Side Reversing Valve 3-Way Valve FIELD PIPING Accumulator (Ø3/8"...

  • Page 29: Wiring Diagrams-Indoor Units

    INDOOR UNIT WIRING DIAGRAM Mega LSN090, 120, 180, 240HEV2 Wiring Diagram for LSN090, 120, 180, 240HEV2 Factory Wiring Field Wiring Option MEZ64135636 PRODUCT DATA | 29 ©...
  • Page 30 INDOOR UNIT WIRING DIAGRAM Mega 115V LSN090HXV and LSN120HXV Wiring Diagram for LSN090, 120HXV 30 | PRODUCT DATA ©...

  • Page 31: Wiring Diagrams-Outdoor Units

    OUTDOOR UNIT WIRING DIAGRAM Mega LSU090, 120HEV2 Wiring Diagram for LSU090, 120HEV2 Factory Wiring Field Wiring Option MEZ64835136 PRODUCT DATA | 31 ©...
  • Page 32 OUTDOOR UNIT WIRING DIAGRAM Mega LSU180, 240HEV2 Wiring Diagram for LSU180, 240HEV2 Factory Wiring Field Wiring Option MEZ66177431 32 | PRODUCT DATA ©...
  • Page 33 OUTDOOR UNIT WIRING DIAGRAM Mega 115V LSU090, 120HXV Wiring Diagram for LSU090, 120HXV 250V 250V PRODUCT DATA | 33 ©...

  • Page 34: Electrical Connections

    ELECTRICAL CONNECTIONS General Power Wiring / Communications Cable Guidelines • Follow manufacturer’s circuit diagrams displayed on the inside of the control box cover. • Have a separate power supply for the indoor units. • Provide a circuit breaker switch between the power source and the indoor unit. •...
  • Page 35 ELECTRICAL CONNECTIONS Figure 16: LS090HEV2 and LS120HEV2 General Power / Communica- Figure 17: LS180HEV2 and LS240HEV2 General Power / Communica- tions System Schematic. tions System Schematic. Power Supply Power Supply Circuit Breaker Circuit Breaker Indoor Unit Indoor Unit Ground Wiring Ground Wiring Outdoor Unit Outdoor Unit...
  • Page 36 Buttons on the AKB73456121 will (Model Nos. AKB74955602 [Mega] and AKB73456121 [Mega 115V]). Optional LG-suppled wired control- differ. lers are available for the Mega 115V units. See “Functions, Controls, Options”, or contact an LG repre- sentative for more information. Wireless Handheld Remote Controller features: Display •...
  • Page 37 ELECTRICAL CONNECTIONS Figure 24: PZCWRC1 LG Wired Remote Extension Cable for Use with the Mega 115V. Verify the connectors are properly inserted. C/BOX Cable (Plug type) To Indoor Unit SPEED CN-REMO TEMP OPER MODE Terminal Extension cable Figure 25: Wired Controller Connection on the Mega 115V Indoor Unit Terminal Block.
  • Page 38 AIR FLOW, STATIC PRESSURE, AND TEMPERATURE DISTRIBUTION Table 14: Mega and Mega 115V Outdoor Unit Air Flow Rate and Static Pressure. Model No. Air Flow Rate (CFM) Static Pressure (in. WG) LSU090HEV2, LSU120HEV2 0.0284 LSU180HEV2, LSU240HEV2 1,730 0.0387 LSU090HXV, LSU120HXV 0.0384 LSN090HEV2 Cooling...
  • Page 39 AIR FLOW AND TEMPERATURE DISTRIBUTION LSN090HEV2, continued. Heating Air Velocity [m/s (ft./s)] ( )] 28(82) 22(72) 26(79) 2(6.6) 0.3(1) 24(75) 0.5(1.6) 1(3.3) 32.8 26.2 19.7 13.1 32.8 26.2 19.7 13.1 Side View Discharge Vertical Louver : Center Air Velocity [m/s (ft./s)] Air Velocity [m/s (ft./s)] 16.4 16.4...
  • Page 40 AIR FLOW AND TEMPERATURE DISTRIBUTION LSN120HEV2 Cooling Air Velocity [m/s (ft./s)] 22(72) 24(75) 2(6.6) 26(79) 0.3(1) 28(82) 0.5(1.6) 1(3.3) 32.8 26.2 19.7 13.1 32.8 26.2 19.7 13.1 Side View Discharge Vertical Louver : Center Air Velocity [m/s (ft./s)] Air Velocity [m/s (ft./s)] 16.4 16.4 0.3(1)
  • Page 41 AIR FLOW AND TEMPERATURE DISTRIBUTION LSN120HEV2, continued. Heating Air V Temperature [ 26 2 Side View Discharge Air V Air V 26 2 Top View Top View Discharge Discharge PRODUCT DATA | 41 ©...
  • Page 42 AIR FLOW AND TEMPERATURE DISTRIBUTION LSN180HEV2 Cooling Air Velocity [m/s (ft./s)] Temperature [ ( )] 20(68) 22(72) 2(6.6) 24(75) 28(82) 0.3(1) 26(79) 0.5(1.6) 1(3.3) 32.8 26.2 19.7 13.1 32.8 26.2 19.7 13.1 Side View Discharge Vertical Louver : Center Air Velocity [m/s (ft./s)] Air Velocity [m/s (ft./s)] 16.4 16.4...
  • Page 43 AIR FLOW AND TEMPERATURE DISTRIBUTION LSN180HEV2, continued. Heating Air Velocity [m/s (ft./s)] ( )] 32(90) 24(75) 28(82) 2(6.6) 0.3(1) 0.5(1.6) 1(3.3) 26(79) 1.5(4.9) 32.8 26.2 19.7 13.1 32.8 26.2 19.7 13.1 Side View Discharge Vertical Louver : Center Air Velocity [m/s (ft./s)] Air Velocity [m/s (ft./s)] 16.4 16.4...
  • Page 44 AIR FLOW AND TEMPERATURE DISTRIBUTION LSN240HEV2 Cooling Air Velocity [m/s (ft./s)] 18(64) 28(82) 2(6.6) 22(72) 24(75) 1.5(4.9) 0.3(1) 0.5(1.6) 26(79) 1(3.3) 32.8 26.2 19.7 13.1 32.8 26.2 19.7 13.1 Side View Discharge Vertical Louver : Center Air Velocity [m/s (ft./s)] Air Velocity [m/s (ft./s)] 16.4 16.4...
  • Page 45 AIR FLOW AND TEMPERATURE DISTRIBUTION LSN240HEV2, continued. Heating Air Velocity [m/s (ft./s)] ( )] 24(75) 32(90) 30(86) 0.3(1) 2(6.6) 28(82) 0.5(1.6) 1(3.3) 26(79) 1.5(4.9) 32.8 26.2 19.7 13.1 32.8 26.2 19.7 13.1 Side View Discharge Vertical Louver : Center Air Velocity [m/s (ft./s)] Air Velocity [m/s (ft./s)] 16.4 16.4...
  • Page 46 AIR FLOW AND TEMPERATURE DISTRIBUTION LSN090HXV Cooling Heating Discharge angle: 45° Discharge angle: 50° Air velocity [ft/s] Air velocity [ft/s] 6.6ft 6.6ft 3.3ft 3.3ft 26.2ft 23.0ft 19.7ft 16.4ft 13.1ft 9.8ft 6.6ft 3.3ft 26.2ft 23.0ft 19.7ft 16.4ft 13.1ft 9.8ft 6.6ft 3.3ft Temperature [°F] Temperature [°F] 6.6ft...

  • Page 47: Accessories

    When connected through the indoor unit, 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: •...
  • Page 48 SIMs consists of a hardware Wireless Local Area Network (WLAN) module, an interface cable, and a free downloadable application (app) for iOS® or Android™. The user must supply either an Apple® or an Android smart phone; SIMs is not optimized for tablets, and only be used with LG single zone and Multi F systems.

  • Page 49: Cooling Capacity Data

    PERFORMANCE DATA Cooling Capacity Data on page 50 Heating Capacity Data on page 53 Maximum Heating Capacity Data on page 55 Equipment Selection Procedure on page 57...
  • Page 50 PERFORMANCE DATA LS090HEV2, LS120HEV2 Cooling Capacity Table for LS090HEV2 (LSU090HEV2 + LSN090HEV2) Table 15: LSN090HEV2 / LSU120HEV2 Cooling Capacities. Outdoor Indoor Air Temperature (°F DB/ °F WB) 64 / 53 68 / 57 72 / 61 77 / 64 80 / 67 86 / 72 90 / 75 Temp.
  • Page 51 PERFORMANCE DATA LS180HEV2, LS240HEV2 Cooling Capacity Table for LS180HEV2 (LSU180HEV2 + LSN180HEV2) Table 17: LSN0180HEV2 / LSU180HEV2 Cooling Capacities. Outdoor Indoor Air Temperature (°F DB/ °F WB) 64 / 53 68 / 57 72 / 61 77 / 64 80 / 67 86 / 72 90 / 75 Temp.
  • Page 52 PERFORMANCE DATA LS090HXV, LS120HXV Cooling Capacity Table for LS090HXV (LSU090HXV + LSN090HXV) Table 19: LSN090HXV / LSU090HXV Cooling Capacities. Outdoor Indoor Air Temperature (°F DB/ °F WB) 64 / 53 68 / 57 72 / 61 77 / 64 80 / 67 86 / 72 90 / 75 Temp.
  • Page 53 PERFORMANCE DATA LS090HEV2, LS120HEV2, LS180HEV2 Heating Capacity Table for LS090HEV2 (LSU090HEV2 + LSN090HEV2) Table 21: LSN090HEV2 / LSU090HEV2 Heating Capacities. Outdoor Air Indoor Air Temperature (°F DB) Temp. °F DB °F WB 6.90 0.70 6.69 0.69 6.62 0.69 6.55 0.68 6.50 0.68 6.37...
  • Page 54 PERFORMANCE DATA LS240HEV2, LS090HXV, LS120HXV Heating Capacity Table for LS240HEV2 (LSU240HEV2 + LSN240HEV2) Table 24: LSN240HEV2 / LSU240HEV2 Heating Capacities. Outdoor Air Indoor Air Temperature (°F DB) Temp. °F DB °F WB 13.92 1.54 13.50 1.53 13.36 1.53 13.23 1.51 13.13 1.51 12.87...
  • Page 55 PERFORMANCE DATA LS090HEV2, LS120HEV2 Maximum Heating Capacity Table for LS090HEV2 (LSU090HEV2 + LSN090HEV2) Table 27: LSN090HEV2 / LSU090HEV2 Heating Capacities. Outdoor Air Indoor Air Temperature (°F DB) Temp. °F DB °F WB 8.37 1.15 8.25 1.17 8.13 1.18 8.08 1.19 7.84 1.17 7.51...
  • Page 56 PERFORMANCE DATA LS180HEV2, LS240HEV2 Maximum Heating Capacity Table for LS180HEV2 (LSU180HEV2 + LSN180HEV2) Table 29: LSN180HEV2 / LSU180HEV2 Heating Capacities. Outdoor Air Indoor Air Temperature (°F DB) Temp. °F DB °F WB 14.59 2.08 14.38 2.11 14.17 2.14 14.08 2.15 13.66 2.12 13.09...

  • Page 57: Equipment Selection Procedure

    EQUIPMENT SELECTION PROCEDURE Cooling / Heating Correction Factors For Single Zone Mega Wall Mounted systems, calculate the equivalent length of the liquid line from the outdoor unit to the indoor unit. Also, determine the elevation difference of the indoor unit above or below the outdoor unit. Find corresponding cooling or heating capacity correc- tion factors as shown below.
  • Page 58 • Use caution when sizing to meet listed capacity specifications for the scheduled manufacturer’s equipment. If further system design assistance is needed, or you have a unique application you would like to discuss, contact your LG sales rep. 58 | PERFORMANCE DATA...
  • Page 59 APPLICATION GUIDELINES Placement Considerations on page 60 Installing Outdoor Units Indoors on page 65 Design Guideline Summary on page 68...

  • Page 60: Placement Considerations

    PLACEMENT CONSIDERATIONS Selecting the Best Location for the Indoor Unit Figure 28: Mega Indoor Unit Clearance Requirements. Follow recommended best practices when choosing an indoor location for the Unit: Inch (mm) single zone indoor unit. >8 (200) • Follow the table at right for minimum clearance of indoor unit from the top of the unit to the ceiling.
  • Page 61 PLACEMENT CONSIDERATIONS Selecting the Best Location for the Outdoor Unit DANGER • Do not install the unit in an area where combustible gas will generate, flow, stagnate, or leak. These conditions can cause a fire, result- ing in bodily injury or death. •...
  • Page 62 PLACEMENT CONSIDERATIONS Planning for Snow and Ice, continued. When deciding on a location to place the outdoor unit, be sure to choose an area where run-off from defrost will not accumulate and freeze on sidewalks or driveways, which will create unsafe conditions. Properly install and insulate any drain hoses to prevent the hose from freezing, cracking, leaking, and causing unsafe conditions from frozen condensate.
  • Page 63 PLACEMENT CONSIDERATIONS Oceanside Applications Figure 32: Oceanside Placement Using Windbreak. Use of a Windbreak to Shield from Sea Wind Windbreak Ocean winds will cause corrosion, particularly on the condenser and • Avoid installing the outdoor unit where it would be directly Sea wind exposed to ocean winds.
  • Page 64 PLACEMENT CONSIDERATIONS Minimum Allowable Clearance and Service Access Requirements Proper clearance for the outdoor unit coil is critical for proper operation. When installing the outdoor unit, consider service, inlet and outlet, and minimum allowable space requirements as illustrated in the diagrams below. •...

  • Page 65: Installing Outdoor Unit Indoors

    PLACEMENT CONSIDERATIONS Installing Outdoor Units Indoors Single Zone Mega and Mega 115V Wall Mount outdoor units are engineered to be mounted outdoors and include technology designed to minimize the negative effects of winter weather’s freezing rain, sleet, and snow. Some building projects, however, necessitate placing the HVAC outdoor units indoors: •...
  • Page 66 PLACEMENT CONSIDERATIONS Provide a means to drain the condensate generated during heating mode and defrost cycle in addition to rainwater that infiltrates the inlet louver enclosed area. • Install a field-provided drain pan under the outdoor units and provide a path to a nearby floor drain. •...
  • Page 67 PLACEMENT CONSIDERATIONS Open Rate by Louver Radian Figure 37: Open Rate by Louver Radian Formula. ho = h * COS Total Area (A) = H * W Number of Open Spaces (N) = (Number of Louvers - 1) Effective Area (Af) = ho * W * N Louver Open Rate (n) = Af / A Af = A * n Side View...

  • Page 68: Refrigerant Piping Design

    REFRIGERANT PIPING DESIGN Device Connection Limitations Figure 39: Mega and Mega 115V System Layout. Max Length = A Single-zone systems consist of one outdoor unit and one indoor unit. One of Unit = Feet Max Elevation = B the most critical elements of a single zone system is the refrigerant piping. 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.
  • Page 69 20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. Commercial Air Conditioning Division EM-SZ_Mega_Mega115V_HEV2_HXV__05_19 4300 North Point Parkway Supersedes: EM-SZ_Mega_Mega115V-3-16 EM- Alpharetta, Georgia 30022 SZ_Mega_Mega115V-4-15 www.lghvac.com EM-SZ_Mega_Mega115V-10-14...

This manual is also suitable for:

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