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LG LC098HV Engineering Manual
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LG LC098HV Engineering Manual

Single-zone four-way ceiling-cassette heat pump systems
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Single-Zone Four-Way
Ceiling-Cassette
Heat Pump Systems
3/4 to 3-1/2 Tons
LC098HV (9,000 Btu/h)
LC128HV (12,000 Btu/h)
CEILING-CASSETTE SYSTEM
LC188HV (18,000 Btu/h)
SINGLE-ZONE FOUR-WAY
ENGINEERING MANUAL
LC249HV (24,000 Btu/h)
LC369HV (36,000 Btu/h)
LC429HV (42,000 Btu/h)

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Summary of Contents for LG LC098HV

  • Page 1 SINGLE-ZONE FOUR-WAY CEILING-CASSETTE SYSTEM ENGINEERING MANUAL Single-Zone Four-Way Ceiling-Cassette Heat Pump Systems 3/4 to 3-1/2 Tons LC188HV (18,000 Btu/h) LC249HV (24,000 Btu/h) LC369HV (36,000 Btu/h) LC098HV (9,000 Btu/h) LC429HV (42,000 Btu/h) LC128HV (12,000 Btu/h)
  • Page 2 (ENERGY STAR and the ENERGY STAR mark are registered trademarks owned by the U.S. Environmental Protection Agency.) 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 Nomenclature..........................................4 LG Air Conditioner Technical Solution (LATS) ................................. 5-6 Four-Way Ceiling-Cassette Product Data................................7-47 ....................................... 8-10 ......................................... 11-15 ..........................................16 ....................................17 ...................................... 18-20 ......................................21-24 ........................................25-28 ....................................29-33 ........................................34-39 ......................................40-42 ................................43-45 ...........................................

  • Page 4: Nomenclature

    UNIT NOMENCLATURE Indoor Units and Outdoor Units L = LG 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 N: Indoor Unit U: Outdoor Unit...

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

    Features All LG product design criteria have been loaded into the program, making LATS simple to use: double click or drag and drop the component choices. Build systems in Tree Mode where the refrigerant system can be viewed. Switch to a Schematic diagram to see the electrical and communications wiring.
  • Page 6 LATS can generate an Excel GERP report that can imported into the LG SOPS pricing and ordering system.

  • Page 7: Four-Way Ceiling-Cassette Product Data

    PRODUCT DATA Mechanical Specifications on page 8 General Data on page 11 Electrical Data on page 16 Functions, Controls, and Options on page 17 Outdoor Unit Dimensions on page 18 Indoor Unit Dimensions on page 21 Acoustic Data on page 25 Refrigerant Flow Diagrams on page 29 Wiring Diagrams on page 34 Electrical Connections on page 40...
  • Page 8 The system was designed to System Models). operate using 208–230/60/1 LG single zone four-way ceiling cassette system comprises of a power with voltage variances single frame outdoor unit connected to a single indoor unit with a of ±10% and includes single refrigerant circuit.
  • Page 9 MECHANICAL SPECIFICATIONS Figure 3: Four-Way Ceiling Frequency ranges for the 9,000 ~ 24,000 Btu/h outdoor units are: or can be used to lock each guide vane independently Cassette System (LC369HV, 9k Btu/h = 20 Hz to 100 Hz Cooling / Heating LC429HV Models).
  • Page 10 2. Factory mounted return air thermistor or the optional wall mounted wired remote temperature sensor. The indoor units are Wi-Fi compatible with the addition of an LG Wi- Indoor Units Fi module accessory, and can be controlled by LG’s ThinQ™ app on The case has a factory designated cutout for the connection of a a smart device.
  • Page 11 GENERAL DATA Pairing Table The following table shows the available outdoor and indoor unit, along with the factory provided controller. Table 1: Four-Way Ceiling Cassette System Pairing Table Outdoor Unit Model Indoor Unit Model Controller LUU090HV LCN098HV4 AKB73757604 (Also referenced by Model No. LUU120HV LCN128HV4 PQWRHQ0FDB)
  • Page 12 GENERAL DATA Table 2: Four-Way 2 x 2 Ceiling Cassette System General Data. LC098HV LC128HV LC188HV System (Model) (Indoor Unit / Outdoor Unit) (LCN098HV4 / (LCN128HV4 / (LCN188HV4 / LUU090HV) LUU120HV) LUU180HV) Ceiling Grille Model Number (Sold Separately) PT-QAGW0 / PT-QCHW0...
  • Page 13 GENERAL DATA Table 3: Four-Way 2 x 2 Ceiling Cassette System General Data (continued). Compressor (Type x Qty.) Twin Rotary x 1 Twin Rotary x 1 Twin Rotary x 1 Dehumidification Rate (pts./hr.) 2.47 Material and Fin Coating Copper Tube / Aluminum Fin and Gold Fin Coated / Hydrophilic ™...
  • Page 14 GENERAL DATA Table 4: Four-Way 3 x 3 Ceiling Cassette System General Data. LC249HV LC369HV LC429HV System (Model) (Indoor Unit / Outdoor Unit) (LCN249HV / LUU240HV) (LCN369HV / LUU360HV) (LCN429HV / LUU420HV) Ceiling Grille Model Number (Sold Separately) PT-AAGW0 PT-AAGW0 PT-AAGW0 Cooling Capacity (Min/Rated/Max) (Btu/h) 9,600~23,000~28,000...
  • Page 15 GENERAL DATA Table 5: Four-Way 3 x 3 Ceiling Cassette System General Data (continued). Compressor (Type x Qty.) Twin Rotary x 1 Scroll x 1 Scroll x 1 Dehumidification Rate (pts./hr.) 10.1 Material and Fin Coating Copper Tube / Aluminum Fin and Gold Fin Coated / Hydrophilic ™...
  • Page 16 ELECTRICAL DATA Table 6: Electrical Data. Condenser Fan Motor(s) Voltage Compressor Nominal Compressor Unit Model No. Hertz Voltage Range Motor RLA Condenser Condenser Fan Tons Quantity (Min. to Max.) (Cooling) Fan Quantity. Motor FLA LUU090HV 11.9 LUU120HV 208 - 230 187 - 253 12.3 1-1/2...
  • Page 17 Primary washable filter. 14”x14”x1” for 2x2 units; 20.5”x20.5”x1” for 3x3 units. Not all controllers can support all features. Requires Wi-Fi module PWFMDD200. feature Requires wired zone controller. Contact your LG representative for details. X = Not Available © PRODUCT DATA | 17...
  • Page 18 OUTDOOR UNIT DIMENSIONS LUU090HV, LUU120HV Figure 4: LUU090HV, LUU120HV Outdoor Unit Dimensions. 2-9/16 17-11/16 7-1/2 13/16 13/16 21-15/32 9-29/32 12-31/32 13-29/32 15/16 17-11/16 8-25/32 2-3/4 4-7/16 1-11/32 No. Part Name Air outlet Control cover & service valve cover Vapor pipe connection Liquid pipe connection Conduit Handle...
  • Page 19 OUTDOOR UNIT DIMENSIONS LUU180HV, LUU240HV Figure 5: LUU180HV, LUU240HV Outdoor Unit Dimensions. © PRODUCT DATA | 19...
  • Page 20 OUTDOOR UNIT DIMENSIONS LUU360HV, LUU420HV Figure 6: LUU360HV, LUU420HV Outdoor Unit Dimensions. 20 | PRODUCT DATA ©...
  • Page 21 INDOOR UNIT DIMENSIONS LCN098HV4, LCN128HV4 Figure 7: LCN098HV4, LCN128HV4 Indoor Unit Dimensions. Maximum Condensate Lift: 27-9/16 © PRODUCT DATA | 21...
  • Page 22 INDOOR UNIT DIMENSIONS LCN188HV4 Figure 8: LCN188HV4 Indoor Unit Dimensions. Maximum Condensate Lift: 27-9/16 22 | PRODUCT DATA ©...
  • Page 23 INDOOR UNIT DIMENSIONS LCN249HV Figure 9: LCN249HV Indoor Unit Dimensions. © PRODUCT DATA | 23...
  • Page 24 INDOOR UNIT DIMENSIONS LCN369HV, LCN429HV Figure 10: LCN369HV, LCN429HV Indoor Unit Dimensions. 24 | PRODUCT DATA ©...
  • Page 25 ACOUSTIC DATA Indoor Units Figure 11: Indoor Unit Sound Pressure Level • Measurements taken with no attenuation and units operating at full load normal Measurement Location. operating condition. • Sound level will vary depending on a range of factors such as construction (acoustic absorption coefficient) of particular area in which the equipment is installed.
  • Page 26 ACOUSTIC DATA Indoor Units Figure 13: Four-Way Ceiling Cassette Indoor Unit Sound Power Level Diagrams. LCN249HV LCN429HV LCN369HV 120.0 120.0 120.0 110.0 110.0 110.0 NR-110 NR-110 NR-110 100.0 NR-105 100.0 100.0 NR-105 NR-105 NR-100 NR-100 NR-100 90.0 NR-95 90.0 90.0 NR-95 NR-95 NR-90...
  • Page 27 ACOUSTIC DATA Outdoor Units Figure 14: Four-Way Ceiling Cassette Outdoor Unit • Measurements taken with no attenuation and units operating at full load normal Sound Pressure Level Measurement Location. operating condition. • Sound level will vary depending on a range of factors such as construction (acous- tic absorption coefficient) of particular area in which the equipment is installed.
  • Page 28 ACOUSTIC DATA Outdoor Units Figure 16: Four-Way Ceiling Cassette Outdoor Unit Sound Power Level Diagrams. LUU360HV LUU420HV LUU180HV, LUU240HV 120.0 120.0 120.0 Cooling Cooling Cooling 110.0 110.0 110.0 NR-115 NR-115 100.0 NR-115 100.0 100.0 NR-110 NR-110 NR-110 NR-105 NR-105 NR-105 90.0 90.0 90.0...
  • Page 29 REFRIGERANT FLOW DIAGRAMS LCN098HV4, LCN128HV4 Indoor Units Figure 17: LCN098HV4, LCN128HV4 Refrigerant Flow Diagram. Gas pipe connection port Heat exchanger (flare connection) Heating Cooling Evaporator Outlet Turbo fan Temperature Thermistor Indoor Air Temperature Thermistor Evaporator Inlet Temperature Thermistor Liquid pipe connection port (flare connection) Table 10: LCN098HV4, LCN128HV4 Four-Way Ceiling Cassette Indoor Unit Thermistor Details.
  • Page 30 REFRIGERANT FLOW DIAGRAMS LCN188HV4 Indoor Units Figure 18: LCN188HV4 Refrigerant Flow Diagram. Gas pipe connection port Heat exchanger (flare connection) Heating Evaporator Outlet Cooling Turbo fan Temperature Thermistor Indoor Air Temperature Thermistor Evaporator Inlet Temperature Thermistor Liquid pipe connection port (flare connection) Table 13: LCN188HV4 Four-Way Ceiling Cassette Indoor Unit Thermistor Details.
  • Page 31 REFRIGERANT FLOW DIAGRAMS LCN249HV, LCN369HV, LCN429HV Indoor Units Figure 20: LCN249HV, LCN369HV, LCN429HV Refrigerant Flow Diagram. Gas Pipe Connection Port Heat Exchanger (Flare Connection) Heating Cooling Evaporator Outlet Turbo Fan Temperature Thermistor Suction Air Temperature Thermistor Humidity Sensor Evaporator Inlet Temperature Thermistor Liquid Pipe Connection Port (Flare Connection)
  • Page 32 REFRIGERANT FLOW DIAGRAMS LUU090HV, LUU120HV Outdoor Units Figure 21: LUU090HV, LUU120HV Refrigerant Flow Diagram. Inlet Air Temperature Refrigerant Flow Thermistor Cooling Heating Condensing Temperature Thermistor Flare Connection Electronic Expansion Strainer Strainer Valve High Pressure Sensor 4 way Valve Flare Connection Discharge Temperature Thermistor...
  • Page 33 REFRIGERANT FLOW DIAGRAMS LUU180HV, LUU240HV, LUU360HV, LUU420HV Outdoor Units Figure 22: LUU180HV, LUU240HV, LUU360HV, LUU420HV Refrigerant Flow Diagram. Condenser Outlet Pipe Temperature Thermistor Condenser Middle Pipe Temperature Thermistor Ø3/8 Inch 36,000 Btu/h and 42,000 Btu/h Outdoor Units have two (2) fans. Ø5/8 Inch Table 21: LUU180HV, LUU240HV, LUU360HV, LUU420HV Four-Way Ceiling Concealed Outdoor Unit Thermistor Details.
  • Page 34 WIRING DIAGRAMS LCN098HV4, LCN128HV4, LCN188HV4 Indoor Units Figure 23: LCN098HV4, LCN128HV4, LCN188HV4 Four-Way Ceiling Cassette Indoor Unit Wiring Diagram. 34 | PRODUCT DATA ©...
  • Page 35 WIRING DIAGRAMS LCN249HV, LCN369HV Indoor Units Figure 24: LCN249HV, LCN369HV Four-Way Ceiling Cassette Indoor Unit Wiring Diagram. © PRODUCT DATA | 35...
  • Page 36 WIRING DIAGRAMS LCN429HV Indoor Units Figure 25: LCN429HV Four-Way Ceiling Cassette Indoor Unit Wiring Diagram. 36 | PRODUCT DATA ©...
  • Page 37 WIRING DIAGRAMS LUU090HV, LUU120HV Outdoor Units Figure 26: LUU090HV, LUU120HV Four-Way Ceiling Cassette Outdoor Unit Wiring Diagram. USE COPPER SUPPLY WIRES. CN_COIL2 250 V / T20 A CN_COIL1 250 V / T3.15 A WCN_L WCN_N COM_RD 250 V / T3.15 A CN_LGMV_BL CN_H_PRESS_RD CN_TH2_YL...
  • Page 38 WIRING DIAGRAMS LUU180HV, LUU240HV Outdoor Units Figure 27: LUU180HV, LUU240HV Four-Way Ceiling Cassette Outdoor Unit Wiring Diagram. USE COPPER SUPPLY WIRES. Thermistor (Suction) Thermistor Thermistor Thermistor MV_JIG Thermistor (Discharge) (Cond. Out) (Air) (Middle) PRESSURE SENSOR CN_LGMV CN_EEV1 CN_C_PIPE CN_H_PRESS CN_AIR CN_SUCTION CN_DISCHARGE CN_MID...
  • Page 39 WIRING DIAGRAMS LUU360HV, LUU420HV Outdoor Units Figure 28: LUU360HV, LUU420HV Four-Way Ceiling Cassette Outdoor Unit Wiring Diagram. DIP Switch F01X 250V T 3.15A FUSE1 250V T 3.15A SW01D F03/FAN_FUSE_02 250V T 3.15A F01/FAN_FUSE_01 FUSE1 250V / T 3.15A FUSE 250 V, 35 A FUSE 250V / T 5A USE COPPER SUPPLY WIRES.
  • Page 40 Power Supply / Power Wiring • LG Single Zone Four-Way Cassette systems operate at 1Ø, 208-230V, 60Hz. • Power wiring / power wiring gauge to the outdoor unit(s) must be solid or stranded, and must comply with all National Electrical Code (NEC), UL, and local electrical codes.
  • Page 41 ELECTRICAL CONNECTIONS Communication / Connection (Power) Cable Specifications from Outdoor Unit to Indoor Unit Figure 30: Single Zone Outdoor Unit to Indoor Unit Wiring and Commu- • Communication / connection (power) cable from the single zone nications Cable Diagram. outdoor unit to the indoor unit must use a minimum of 14 AWG, four (4) conductor, stranded, shielded or unshielded (if shielded, it must be grounded to the chassis of the outdoor unit only), and Communication / Connection...
  • Page 42 Optional controllers (see “Functions, Controls, Options”, or contact an LG representative for more information) can connect to the Four-Way Ceiling Cassette 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.
  • Page 43 AIR VELOCITY AND TEMPERATURE DISTRIBUTION Figure 36: LCN098HV4 Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle: 40° Discharge angle: 50° Air velocity [ft/s] Air velocity [ft/s] Temperature [°F] Temperature [°F] Figure 37: LCN128HV4 Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle: 40°...
  • Page 44 AIR VELOCITY AND TEMPERATURE DISTRIBUTION Figure 38: LCN188HV4 Air Velocity and Temperature Distribution Charts. Figure 39: LCN249HV Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle: Outer - 30°, Inner - 67° Discharge angle: Outer - 36°, Inner - 70° Air velocity [ft/s] Air velocity [ft/s] 8.9 ft...
  • Page 45 AIR VELOCITY AND TEMPERATURE DISTRIBUTION Figure 40: LCN369HV Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle: Outer - 30°, Inner - 67° Discharge angle: Outer - 36°, Inner - 70° Air velocity [ft/s] Air velocity [ft/s] 10.5 ft 10.5 ft 9.8 ft 9.8 ft...
  • Page 46 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 47 ACCESSORIES Four-Way Ceiling-Cassette Accessories Overview Table 22: Four-Way Ceiling-Cassette Accessories Overview. Accessory Model Number PT-QAGW0 / PT-QCHW0 Standard Panel — White (One Required) PT-AAGW0 Premium Panel (Includes Panel PT-AFGW0 + Air Purification Kit PTAHMP0) PT-AFGW0S Air Purification Kit (Only Available with Premium Panel PTAFGW0S) PTAHMP0 Cassette Decorative Cover PTDCQ...

  • Page 48: Four-Way Ceiling-Cassette Performance Data

    PERFORMANCE DATA Cooling Capacity Data on page 49 Heating Capacity Data on page 55 Maximum Cooling Capacity Data on page 58 Maximum Heating Capacity Data on page 61 Equipment Selection Procedure on page 64...
  • Page 49 PERFORMANCE DATA Cooling Capacity LC098HV Cooling Capacity Table for LC098HV (LCN098HV4 + LUU090HV) Table 23: LCN098HV4 / LUU090HV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64...
  • Page 50 PERFORMANCE DATA Cooling Capacity LC128HV Cooling Capacity Table for LC128HV (LCN128HV4 + LUU120HV) Table 24: LCN128HV4 / LUU120HV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 51 PERFORMANCE DATA Cooling Capacity LC188HV Cooling Capacity Table for LC188HV (LCN188HV4 + LUU180HV) Table 25: LCN188HV4 / LUU180HV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 52 PERFORMANCE DATA Cooling Capacity LC249HV Cooling Capacity Table for LC249HV (LCN249HV + LUU240HV) Table 26: LCN249HV / LUU240HV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 53 PERFORMANCE DATA Cooling Capacity LC369HV Cooling Capacity Table for LC369HV (LCN369HV + LUU360HV) Table 27: LCN369HV / LUU360HV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 54 PERFORMANCE DATA Cooling Capacity LC429HV Cooling Capacity Table for LC429HV (LCN429HV + LUU420HV) Table 28: LCN429HV / LUU420HV Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72 90 / 75...
  • Page 55 PERFORMANCE DATA Heating Capacity LC098HV, LC128HV Heating Capacity Table for LC098HV (LCN098HV4 + LUU090HV) Table 29: LCN098HV4 / LUU090HV Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -4.4 4.38 0.61 4.06 0.63 4.03 0.64 3.99...
  • Page 56 PERFORMANCE DATA Heating Capacity LC188HV, LC249HV Heating Capacity Table for LC188HV (LCN188HV4 + LUU180HV) Table 32: LCN188HV4 / LUU180HV Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -4.4 9.61 6.86 8.97 7.08 8.87 7.30 8.76 7.42 8.67...
  • Page 57 PERFORMANCE DATA Heating Capacity LC369HV, LC429HV Heating Capacity Table for LC369HV (LCN369HV + LUU360HV) Table 33: LCN369HV / LUU360HV Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -4.4 15.17 2.04 14.16 2.10 14.01 2.17 13.83 2.20 13.68...
  • Page 58 PERFORMANCE DATA Maximum Cooling Capacity LC249HV Maximum Cooling Capacity Table for LC249HV (LCN249HV + LUU240HV) Table 35: LCN249HV / LUU240HV Maximum Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72...
  • Page 59 PERFORMANCE DATA Maximum Cooling Capacity LC369HV Maximum Cooling Capacity Table for LC369HV (LCN369HV + LUU360HV) Table 36: LCN369HV / LUU360HV Maximum Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72...
  • Page 60 PERFORMANCE DATA Maximum Cooling Capacity LC429HV Maximum Cooling Capacity Table for LC429HV (LCN429HV + LUU420HV) Table 37: LCN429HV / LUU420HV Maximum Cooling Capacities. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. 68 / 57 73 / 61 77 / 64 80 / 67 86 / 72...
  • Page 61 PERFORMANCE DATA Maximum Heating Capacity LC098HV, LC128HV Maximum Heating Capacity Table for LC098HV (LCN098HV4 + LUU090HV) Table 38: LCN098HV4 / LUU090HV Maximum Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 8.71 1.11 8.51 1.15...
  • Page 62 PERFORMANCE DATA Maximum Heating Capacity LC188HV, LC249HV Maximum Heating Capacity Table for LC188HV (LCN188HV4 + LUU180HV) Table 41: LCN188HV4 / LUU180HV Maximum Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 15.47 2.04 15.13 2.11 14.69 2.17...
  • Page 63 PERFORMANCE DATA Maximum Heating Capacity LC369HV, LC429HV Maximum Heating Capacity Table for LC369HV (LCN369HV + LUU360HV) Table 42: LCN369HV / LUU360HV Maximum Heating Capacities. Outdoor Air Temp. Indoor Air Temp. °F DB °F DB °F WB -13.4 30.46 4.36 29.78 4.51 28.93 4.65...
  • Page 64 Table 44: Piping Length (ft.) 24.6 32.8 49.2 65.6 98.4 131.2 164.0 196.9 229.7 246.0 LC098HV (9,000 Btu/h) 99.7 99.2 98.7 Rate of Capacity Change (%) LC128HV (12,000 Btu/h) 99.7 99.2 98.7 LC098HV (9,000 Btu/h) 99.7 99.2 98.7...
  • Page 65 • Verify that the sensible load of the zone is satisfied. • 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. ©...

  • Page 66: Application Guidelines

    APPLICATION GUIDELINES Placement Considerations on page 67 Installing Outdoor Units Indoors on page 75 Refrigerant Piping Design on page 78...
  • Page 67 PLACEMENT CONSIDERATIONS Indoor Unit Selecting the Best Location for the Indoor Unit WARNING Figure 43: Indoor Unit Clearance Requirements. Do’s Ceiling Select a location for installing the indoor units that will meet the following conditions: • 13/32 or more • Ceiling Board Ceiling Board Ceiling Cassette...
  • Page 68 PLACEMENT CONSIDERATIONS Indoor Unit NOTE • • The unit will be damaged, will malfunction, and / or will not operate as designed if installed in any of the conditions listed. Installing in a High or Dropped Ceiling High or dropped ceilings, often found in commercial buildings and offices, will cause a wide temperature differentiation. To countermeasure: •...
  • Page 69 PLACEMENT CONSIDERATIONS Outdoor Unit Selecting the Best Location for the Outdoor Unit DANGER • • • NOTE Select a location for installing the outdoor unit that will meet the following conditions: • Where there is enough strength to bear the weight of the unit. •...
  • Page 70 If the building does not include lightning protection, the outdoor unit will be damaged from a lightning strike. Inform the customer of this possibility in advance. Due to our policy of continuous product innovation, some specifications may change without notification. © 70 | APPLICATION LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
  • Page 71 PLACEMENT CONSIDERATIONS Outdoor Unit Oceanside Applications Figure 48: Oceanside Placement Using Windbreak. Use of a Windbreak to Shield from Sea Wind Windbreak • Avoid installing the outdoor unit where it would be directly Sea wind exposed to ocean winds. • Install the outdoor unit on the side of the building opposite from direct ocean winds.
  • Page 72 PLACEMENT CONSIDERATIONS Outdoor Unit Minimum Allowable Clearance and Service Access Requirements Proper clearance for the outdoor unit coil is critical for proper unit operation. When installing the outdoor unit, consider service, inlet and outlet and minimum allowable space requirements as illustrated in the diagrams on the following pages. •...
  • Page 73 PLACEMENT CONSIDERATIONS Outdoor Unit Outdoor Unit (36,000 and 42,000 Btu/h Capacity) Service Access and Allowable Clearances When installing the outdoor unit, consider service, inlet, and outlet, and minimum allowable space requirements as illustrated in the following diagrams. Minimum 11-13/16 Strong Strong wind wind...
  • Page 74 PLACEMENT CONSIDERATIONS Outdoor Unit Obstacles above and on the Where there are obstacles on both suction Obstacle just on the and discharge sides (discharge side obstacle air discharge side. air discharge side. is higher than the outdoor unit). Where there are obstacles above, and on both Where there are obstacles on both suction suction and discharge sides (discharge side obstacle and discharge sides (discharge side obstacle...
  • Page 75 PLACEMENT CONSIDERATIONS Installing Outdoor Units Indoors Installing Outdoor Units Indoors Single Zone Cassette 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 76 PLACEMENT CONSIDERATIONS Installing Outdoor Units Indoors 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 77 PLACEMENT CONSIDERATIONS Installing Outdoor Units Indoors Open Rate by Louver Radian Figure 53: 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...
  • Page 78 Measured in Actual Feet) Additional Refrigerant Needed (oz/ft) 0.22 0.43 0.43 Figure 55: Typical LC098HV and LC128HV System Layout. Figure 56: Typical LC188HV and LC249HV System Layout. Unit = Feet Unit = Feet Max Length = A Max Length = A...
  • Page 79 20001747 ISO 9001: 2008 LG ELECTRONICS INC. EM_SZ_Cassette_0HV_08_23 Supersedes: EM_SZ_Cassette_0HV_07_23 EM_SZ_Cassette_02_23 EM_SZ_Cassette_12_22 EM_SZ_Cassette_06_21 EM_SZ_Cassette_05_21 EM_SZ_Cassette_04_21 EM_SZ_Cassette_10_20 EM_SZ_Cassette_09_20 EM_SZ_Cassette_09_19 EM_SZ_Cassette_2_19 LG Electronics, U.S.A., Inc. EM_SZ_Cassette_12_18 Air Conditioning Technologies EM_SZ_Cassette_11_18 4300 North Point Parkway EM_SZ_Cassette_8_17 Alpharetta, Georgia 30022 EM_SZ_Cassette_7_16 www.lghvac.com DFS-EM-AC-001-US_014D02...

This manual is also suitable for:

Lc128hvLc188hvLc249hvLc369hvLc429hv