SINGLE-ZONE CEILING-CONCEALED DUCTED SYSTEM ENGINEERING MANUAL Single-Zone Ceiling-Concealed Ducted Heat Pump Systems 3/4 to 3 Tons Low Static LD097HV4 (9,000 Btu/h) LD127HV4 (12,000 Btu/h) LD187HV4 (18,000 Btu/h) High Static LH248HV4 (24,000 Btu/h) High Static LH368HV4 (36,000 Btu/h)
PROPRIETARY DATA NOTICE This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc., and are disclosed by LG Electronics U.S.A., Inc. only in confidence. This document is for design purposes only. 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.
TABLE OF CONTENTS Unit Nomenclature........................................................................................................................................................................................................... 4 LG Air Conditioner Technical Solution (LATS)..........................................................................................................................................................5-6 Ducted System Data..................................................
UNIT NOMENCLATURE L H N 248 H Single Zone Ceiling-Concealed Ducted System Engineering Manual 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 No N or U: System Nominal Capacity (Nominal cooling capacity in Btu/h): 09 = 9,000 30 = 30,000 12 = 12,000 36 = 36,000 18 = 18,000 42 = 42,000 24 = 24,000 54 = 54,000 System Type: H = Heat Pu
LG AIR CONDITIONER TECHNICAL SOLUTION (LATS) LG Air Conditioner Technical Solution (LATS) Software A properly designed and installed refrigerant piping system is critical to the optimal performance of LG air-conditioning systems. To assist engineers, LG offers, free of charge, LG Air Conditioner Technical Solution (LATS) software—a total design solution for LG air conditioning systems. Contact your LG Rep for the best software program for your application.
LG AIR CONDITIONER TECHNICAL SOLUTION (LATS) LATS Generates a Complete Project Report Single Zone Ceiling-Concealed Ducted System Engineering Manual LATS software also generates a report containing project design parameters, cooling and heating design data, system component performance, and capacity data.
CEILING-CONCEALED DUCTED UNIT PRODUCT DATA Mechanical Specifications on page 8 General Data on page 10 Electrical Data on page 13 Functions, Controls, and Options on page 14 Dimensions on page 16 Acoustic Data on page 22 Refrigerant Flow Diagrams on page 26 Wiring Diagrams on page 33 Electrical Connections on page 40 External Static Pressure on page 46 Accessories on page 48
MECHANICAL SPECIFICATIONS Ceiling-Concealed Ducted System General Casing / Frame LG single zone ceiling-concealed ducted system comprises of a single frame outdoor unit connected to a single indoor unit with a single refrigerant circuit. An LG single zone ceiling-concealed ducted system can operate in either cooling or heating mode. The system is capable of changing mode within a maximum time of three (3) minutes to ensure indoor temperature can be properly maintained.
MECHANICAL SPECIFICATIONS Ceiling-Concealed Ducted System Compressors The 9,000 ~ 24,000 Btu/h outdoor units are equipped with one hermetically sealed, digitally controlled, inverter-driven twin rotary compressor to modulate capacity (modulation in 1 Hz increments). The 36,000 Btu/h outdoor unit is equipped with one hermetically sealed, digitally controlled, inverter-driven scroll compressor to modulate capacity (modulation in 1 Hz increments).
GENERAL DATA Ceiling Concealed Ducted Pairing Table The following table shows the available outdoor and indoor unit. Single Zone Ceiling-Concealed Ducted System Engineering Manual Table 1: Ceiling-Concealed Ducted System Pairing Table Low Static High Static Outdoor Unit Model Indoor Unit Model LUU097HV LUU127HV LDN097HV4 LDN127HV4 LUU189HV LDN187HV4 LUU249HV LHN248HV LUU369HV LHN368HV The above units require any LG wired remote controller for operation.
GENERAL DATA / SPECIFICATIONS Low Static Ducted EEV: Electronic Expansion Valve, IDU: Indoor Unit, ODU: Outdoor Unit. This unit comes with a dry helium charge. This data is rated 0 ft above sea level, with 24.6 ft of refrigerant line per indoor unit and a 0 ft level difference between outdoor and indoor units. Cooling capacity rating obtained with air entering the indoor coil at 80ºF dry bulb (DB) and 67ºF wet bulb (WB); and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB).
GENERAL DATA / SPECIFICATIONS High Static Ducted Single Zone Ceiling-Concealed Ducted System Engineering Manual Table 3: Ceiling-Concealed Ducted (High Static) System General Data.
ELECTRICAL DATA Electrical Data Table 4: Electrical Data. Nominal Tons Low Static Unit Model No. Hertz Voltage Voltage Range (Min. to Max.) MCA 3/4 1 1.5 LUU097HV LUU127HV LUU189HV 60 208 - 230 187 - 253 11.9 12.3 20 2 3 LUU249HV LUU369HV 60 208 - 230 187 - 253 20 32 High Static Voltage tolerance is ±10%. Maximum allowable voltage unbalance is 2%. RLA = Rated Load Amps. MOP 15 30 30 40 Compressor Quantity 1 1 Compressor Motor RLA (Cooling) 9.0 13.5 13.
FUNCTIONS, CONTROLS, AND OPTIONS Indoor Unit Functions, Controls, and Options for LDN097HV4, LDN127HV4, LDN187HV4 LHN248HV, LHN368HV Controllers Operation Airflow Indoor Unit Type Special Functions Single Zone Ceiling-Concealed Ducted System Engineering Manual Table 5: Indoor Unit—Functions, Controls, and Options. Air supply outlets Airflow steps (fan/cool/heat) Washable anti-fungal filter1 Drain pump E.S.P.
FUNCTIONS, CONTROLS, AND OPTIONS Outdoor Unit Functions, Controls, and Options for LUU097HV, LUU127HV, LUU189HV, LUU249HV, LUU369HV Table 6: Outdoor Unit—Functions, Controls, and Options.
OUTDOOR UNIT DIMENSIONS Dimensions for LUU097HV, LUU127HV Figure 5: LUU097HV, LUU127HV Dimensions. 11-11/32 Single Zone Ceiling-Concealed Ducted System Engineering Manual 1-3/16 2-9/16 17-11/16 1-1/16 13/16 30-5/16 22-3/16 4 Holes for Anchor Bolts (M 13/32) 6-5/8 15-11/16 19-11/16 1 2-23/32 13/16 21-15/32 12-31/32 13-29/32 2-3/32 4 - LD.
OUTDOOR UNIT DIMENSIONS Dimensions for LUU189HV, LUU249HV Figure 6: LUU189HV, LUU249HV Dimensions. Product Data 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.
OUTDOOR UNIT DIMENSIONS Dimensions for LUU369HV Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 7: LUU369HV Unit Dimensions. 18 | DUCTED 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.
INDOOR UNIT DIMENSIONS Dimensions for LDN097HV4, LDN127HV4, LDN187HV4 Figure 8: LDN097HV4, LDN127HV4, LDN187HV4 Indoor Unit Dimensions. 5-5/16 1-3/8 13/16 Top D Product Data Supply Air LDN187HV4 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.
INDOOR UNIT DIMENSIONS Dimensions for LHN248HV Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 9: LHN248HV Indoor Unit Dimensions. 20 | DUCTED 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.
INDOOR UNIT DIMENSIONS Dimensions for LHN368HV Figure 10: LHN368HV Indoor Unit Dimensions. 9-3/32 1-25/32 47-1/2 9-5/16 27-1/16 27-9/16 26-5/32 Product Data 27-1/4 10-11/16 10-11/16 16-9/16 24-3/8 7-7/8 50-17/32 54-7/32 49-9/32 49-3/16 47-15/32 3-9/16 7-7/32 6-19/32 5-15/32 27/32 2-1/32 7/8 9-1/4 8-21/32 14-9/32 10-13/32 Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ.
ACOUSTIC DATA Sound Pressure for Outdoor Units Outdoor Unit Sound Pressure Level Measurement Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 11: Ceiling-Concealed Ducted Outdoor Unit Sound Pressure Level Measurement Location. • Measurements taken with no attenuation and units operating at full load normal operating condition.
ACOUSTIC DATA Sound Pressure for Outdoor Units Outdoor Unit Sound Pressure Diagrams LUU189HV, LUU249HV 80 LUU369HV 80 ▲ Cooling Heating NC-60 NC-55 50 NC-50 NC-45 40 NC-40 NC-35 30 NC-30 20 10 Approximate Hearing Threshold 63 125 250 500 1000 2000 4000 65 NC-60 55 NC-55 50 NC-50 45 NC-45 40 NC-40 35 NC-35 30 25 NC-20 20 8000 NC-65 60 NC-25 NC-15 Octave Band Center Frequency (Hz) Octave Band Sound Pressure Level (dB = 20μPa ) NC-65 70 Product Data Octave Band Sou
ACOUSTIC DATA Sound Pressure for Indoor Units Indoor Unit Sound Pressure Measurement Figure 13: Indoor Unit Sound Pressure Level Measurement Location. • Measurements taken with no attenuation and units operating at full load normal 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. • Sound power levels are measured in dB(A)±1.
ACOUSTIC DATA Sound Pressure for Indoor Units Indoor Unit Sound Pressure Diagrams Figure 15: Ducted Indoor Unit Sound Pressure Level Diagrams. LHN248HV LHN368HV Product Data 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.
OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM Refrigerant Flow Diagram for LUU097HV, LUU127HV Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 16: LUU097HV and LUU127HV Ceiling-Concealed Ducted (Low Static) Outdoor Unit Refrigerant Flow Diagram.
OUTDOOR UNIT REFRIGERANT FLOW DIAGRAM Refrigerant Flow Diagram for LUU189HV, LUU249HV, LUU369HV Figure 17: LUU189HV, LUU249HV, LUU369HV Refrigerant Flow Diagrams.
INDOOR UNIT REFRIGERANT FLOW DIAGRAM Refrigerant Flow Diagram for LDN097HV4 Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 18: LDN097HV4 Ceiling-Concealed Ducted (Low Static) Refrigerant Flow Diagram. : Cooling : Heating Evaporator Outlet Temperature Thermistor Evaporator Inlet Temperature Thermistor Sirocco Fan M Indoor Unit Indoor Air Temperature Thermistor Table 11: LDN097HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Thermistor Details.
INDOOR UNIT REFRIGERANT FLOW DIAGRAM Refrigerant Flow Diagram for LDN127HV4 Figure 19: LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Refrigerant Flow Diagram. : Cooling : Heating Evaporator Outlet Temperature Thermistor Evaporator Inlet Temperature Thermistor Sirocco Fan M M Product Data Indoor Unit Indoor Air Temperature Thermistor Table 15: LDN127HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Thermistor Details.
INDOOR UNIT REFRIGERANT FLOW DIAGRAM Refrigerant Flow Diagram for LDN187HV4 Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 20: LDN187HV4 Ceiling-Concealed Ducted Refrigerant Flow Diagram. : Cooling : Heating Evaporator Outlet Temperature Thermistor Sirocco Fan M M Evaporator Inlet Temperature Thermistor Indoor Unit Indoor Air Temperature Thermistor Table 17: LDN187HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Thermistor Details.
INDOOR UNIT REFRIGERANT FLOW DIAGRAM Refrigerant Flow Diagram for LHN248HV Figure 21: LHN248HV Ceiling-Concealed Ducted (High Static) Indoor Unit Refrigerant Flow Diagram.
INDOOR UNIT REFRIGERANT FLOW DIAGRAM Refrigerant Flow Diagram for LHN368HV Figure 22: LHN368HV Ceiling-Concealed Ducted (High Static) Indoor Unit Refrigerant Flow Diagram.
OUTDOOR UNIT WIRING DIAGRAM Wiring Diagram for LUU097HV, LUU127HV Figure 23: LUU097HV and LUU127HV Ceiling-Concealed (Low Static) Ducted Outdoor Unit Wiring Diagram. Product Data 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.
OUTDOOR UNIT WIRING DIAGRAM Wiring Diagram for LUU189HV Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 24: LUU189HV Outdoor Unit Wiring Diagram. 7.19 34 | DUCTED 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.
OUTDOOR UNIT WIRING DIAGRAM Wiring Diagram for LUU249HV Figure 25: LUU249HV Outdoor Unit Wiring Diagram. Product Data 7.19 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.
OUTDOOR UNIT WIRING DIAGRAM Wiring Diagram for LUU369HV Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 26: LUU369HV Outdoor Unit Wiring Diagram. 7.19 36 | DUCTED 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.
INDOOR UNIT WIRING DIAGRAM Wiring Diagram for LDN097HV4 Figure 27: LDN097HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Wiring Diagram. Product Data 8.19. 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.
INDOOR UNIT WIRING DIAGRAM Wiring Diagram for LDN127HV4, LDN187HV4 Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 28: LDN127HV4, LDN187HV4 Ceiling-Concealed Ducted (Low Static) Indoor Unit Wiring Diagram. 38 | DUCTED 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.
INDOOR UNIT WIRING DIAGRAM Wiring Diagram for LHN248HV, LHN368HV Figure 29: LHN248HV, LHN368HV Ceiling-Concealed Ducted (High Static) Indoor Unit Wiring Diagram. Product Data 7.19 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 CONNECTIONS Single Zone Ceiling-Concealed Ducted System Engineering Manual 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. Confirm power source specifications. Properly ground the outdoor unit and the indoor unit per NEC and local codes.
ELECTRICAL CONNECTIONS Outdoor Unit Power Wiring / Communications Cable Connections LUU097HV, LUU127HV, LUU189HV, LUU249HV, LUU369HV Outdoor Unit Connections 1. 2. 3. 4. 5. 6. 7. 8. Remove the cover or control cover from the unit by loosening the fastening screws. Take off the caps on the conduit panel. Connect both the power supply and low voltage lines to the corresponding terminals on the terminal block. Be sure to ground the unit by following local codes.
ELECTRICAL CONNECTIONS Single Zone Ceiling-Concealed Ducted System Engineering Manual Ducted Indoor Unit Power Wiring / Communications Cable Connections 1. To access the terminal block, first detach the cover from the control box. Figure 34: Accessing the Indoor Unit Terminal Block. 2. Insert the power wiring / communications cable from the outdoor unit through the sides of the indoor unit and control box. Pass the wiring through the designated Terminal Block access holes to prevent damage.
ELECTRICAL CONNECTIONS Wiring Connections Figure 36: Detailed Power / Communications System Schematic. L N Outdoor Unit Power Supply Main Switch G Circuit Breaker L Fuse N Terminal Block Outdoor 1(L1) 2(L2) Terminal Block Outdoor 1(L1) 2(L2) 3 Power Wiring (Including Ground) Product Data Power Wiring Communication Cable 1(L1) 2(L2) 3 Terminal Block Indoor Indoor Unit • Power wiring and communications cable sizes must comply with applicable federal UL / ETL, state, and local codes.
ELECTRICAL CONNECTIONS Wired Controller Connections 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 or UL1007, and at least FT-6 rated if local electric and building codes require plenum cable usage).
ELECTRICAL CONNECTIONS Wired Controller Placement Wired controllers include a sensor to detect room temperature. To maintain comfort levels in the conditioned space, the wired controller must be installed in a location away from direct sunlight, high humidity, and where it could be directly exposed to cold air.
EXTERNAL STATIC PRESSURE Indoor Units Ceiling-Concealed Low Static Ducted External Static Pressure Settings Table 27: Ceiling-Concealed Ducted (Low Static) Indoor Unit External Static Pressure Setting Values Table. Single Zone Ceiling-Concealed Ducted System Engineering Manual Static Pressure (in. wg) 0.0 0.04 0.08 Model No. / Nominal Capacity Airflow Rate / CFM of System (Btu/h) LDN097HV4 9,000 LDN127HV4 12,000 LDN187HV4 18,000 0.12 0.16 0.20 Setting Value (in.
EXTERNAL STATIC PRESSURE Indoor Units Setting the External Static Pressure on the Remote Controller Use this function to set the wind strength for each airflow level. • The external static pressure must be set by a trained service provider, and it must be set correctly. If the external static pressure is set incorrectly, the product may malfunction. • Do not alter the external static pressure value that corresponds to each airflow level. • External static pressure values vary according to the model.
ACCESSORIES Ceiling-Concealed Ducted Indoor Unit Accessories Single Zone Ceiling-Concealed Ducted System Engineering Manual Table 30: Ceiling-Concealed Ducted Indoor Unit Accessories. Model No.
ACCESSORIES LG Monitoring View (LGMV) Diagnostic Software and Cable Product Data LGMV software allows the service technician or commissioning agent to connect a computer USB port to the outdoor unit main printed circuit board (PCB) using an accessory cable without the need for a separate interface device.
ACCESSORIES Single Zone Ceiling-Concealed Ducted System Engineering Manual LG Smart Inverter Monitoring System (SIMS) SIMS can be used to display and graph operational data for single zone systems and respective components (indoor unit and outdoor unit). SIMS also displays error codes and a troubleshooting guide. SIMs consists of a hardware Wireless Local Area Network (WLAN) module, an interface cable, and a free downloadable application (app) for iOS® or Android™.
CEILING-CONCEALED DUCTED UNIT PERFORMANCE DATA Cooling Capacity Data on page 52 Heating Capacity Data on page 57 Maximum Heating Capacity Data on page 62
PERFORMANCE DATA Low Static Ducted Cooling Capacity Tables Cooling Capacity Table for LD097HV4 (LDN097HV4 + LUU097HV) Table 32: LD097HV4 Ceiling-Concealed Ducted (Low Static) System Cooling Capacity Table. Single Zone Ceiling-Concealed Ducted System Engineering Manual Outdoor Air Temp. (°F DB) 68 / 57 TC SHC PI 73 / 61 TC SHC PI Indoor Air Temp. °F DB / °F WB 77 / 64 80 / 67 TC SHC PI TC SHC PI PI 90 / 75 TC SHC PI -4 8.85 6.84 0.42 9.40 7.23 0.44 9.95 7.00 0.45 10.34 7.15 0.46 11.
PERFORMANCE DATA Low Static Ducted Cooling Capacity Tables Cooling Capacity Table for LD127HV4 (LDN127HV4 + LUU127HV) Table 33: LD127HV4 Ceiling-Concealed Ducted (Low Static) System Cooling Capacity Table. Indoor Air Temp. °F DB / °F WB Outdoor Air Temp. (°F DB) TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI -4 11.40 9.03 0.53 12.11 9.54 0.55 12.82 9.24 0.57 13.33 9.43 0.58 14.24 9.51 0.59 14.95 9.69 0.60 0 11.40 9.08 0.54 12.11 9.60 0.56 12.
PERFORMANCE DATA Low Static Ducted Cooling Capacity Tables Cooling Capacity Table for LD187HV4 (LDN187HV4 + LUU189HV) Single Zone Ceiling-Concealed Ducted System Engineering Manual Table 34: LD187HV4 Ceiling-Concealed Ducted (Low Static) System Cooling Capacity Table. Indoor Air Temp. °F DB / °F WB 77 / 64 80 / 67 TC SHC PI TC SHC PI Outdoor Air Temp. (°F DB) TC -4 17.70 12.40 0.92 18.80 13.10 0.96 19.89 12.68 0.99 20.69 12.95 1.00 22.09 0 17.69 12.47 0.93 18.79 13.18 0.97 19.
PERFORMANCE DATA High Static Ducted Cooling Capacity Tables Cooling Capacity Table for LH248HV4 (LHN248HV + LUU249HV) Table 35: LH248HV4 Ceiling-Concealed Ducted (High Static) System Cooling Capacity Table. Outdoor Air Temp. (°F DB) Indoor Air Temp. °F DB / °F WB 68 / 57 TC SHC 72 / 61 77 / 64 80 / 67 86 / 72 90 / 75 PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI TC SHC PI -4 23.60 18.47 1.18 25.06 19.51 1.23 26.53 18.89 1.27 27.58 19.29 1.29 29.46 19.45 1.31 30.
PERFORMANCE DATA High Static Ducted Cooling Capacity Tables Cooling Capacity Table for LH368HV4 (LHN368HV + LUU369HV) Single Zone Ceiling-Concealed Ducted System Engineering Manual Table 36: LH368HV4 Ceiling-Concealed Ducted (High Static) System Cooling Capacity Table. Outdoor Air Temp. (°F DB) -4 -0.4 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 68 / 57 TC SHC 35.39 35.37 35.34 35.32 35.29 35.26 35.24 35.21 35.18 35.16 35.13 35.10 35.08 35.05 35.02 34.99 34.15 33.
PERFORMANCE DATA Low Static Ducted Heating Capacity Tables Heating Capacity Table for LD097HV4 (LDN097HV4 + LUU097HV) Table 37: LD097HV4 Ceiling-Concealed Ducted (Low Static) System Heating Capacity Table. Outdoor Air Temp. °F DB °F WB -4 Indoor Air Temp. °F DB 61 64 68 70 72 75 TC PI TC PI TC PI TC PI TC PI TC PI -4.4 8.12 0.86 7.68 0.90 7.53 0.90 7.42 0.91 7.33 0.91 7.03 0.95 0 -0.4 8.58 0.89 8.16 0.93 7.98 0.94 7.85 0.95 7.75 0.95 7.43 0.99 5 4.5 9.
PERFORMANCE DATA Low Static Ducted Heating Capacity Tables Heating Capacity Table for LD127HV4 (LDN127HV4 + LUU127HV) Table 38: LD127HV4 Ceiling-Concealed Ducted (Low Static) System Heating Capacity Table. Single Zone Ceiling-Concealed Ducted System Engineering Manual Outdoor Air Temp. °F DB °F WB Indoor Air Temp. °F DB 61 64 68 70 75 TC PI TC PI TC PI TC PI TC PI TC PI -4 -4.4 5.93 0.93 5.48 0.97 5.46 0.98 5.40 0.99 5.35 0.99 5.11 1.03 0 -0.4 7.22 0.94 6.79 0.98 6.
PERFORMANCE DATA Low Static Ducted Heating Capacity Tables Heating Capacity Table for LD187HV4 (LDN187HV4 + LUU189HV) Table 39: LD187HV4 Ceiling-Concealed Ducted (Low Static) System Heating Capacity Table. Outdoor Air Temp. Indoor Air Temp. °F DB 61.0 64.0 68.0 70.0 72.0 75.0 °F DB °F WB TC PI TC PI TC PI TC PI TC PI TC PI -4 -4.4 7.90 6.83 7.31 7.05 7.27 7.26 7.19 7.38 7.12 7.48 6.80 7.70 0 -0.4 9.44 6.41 8.88 6.61 8.74 6.82 8.62 6.93 8.52 7.02 8.16 7.
PERFORMANCE DATA High Static Ducted Heating Capacity Tables Heating Capacity Table for LH248HV4 (LHN248HV + LUU249HV) Table 40: LH248HV4 Ceiling-Concealed Ducted (High Static) System Heating Capacity Table. Single Zone Ceiling-Concealed Ducted System Engineering Manual Outdoor Air Temp. °F DB °F WB -4 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 -4.4 -0.4 4.5 9 15 19 23 28 32 36 41 43 46 51 56 59 64 61.0 TC PI 13.03 14.47 16.07 17.43 19.07 20.10 21.84 23.60 25.35 26.64 28.26 28.90 28.99 29.13 29.
PERFORMANCE DATA High Static Ducted Heating Capacity Tables Heating Capacity Table for LH368HV4 (LHN368HV + LUU369HV) Table 41: LH368HV4 Ceiling-Concealed Duct (High Static) System Heating Capacity Table. Indoor Air Temp. °F DB Outdoor Air Temp. 61.0 64.0 68.0 70.0 72.0 75.0 °F WB TC PI TC PI TC PI TC PI TC PI TC PI -4 -4.4 15.17 2.12 14.16 2.18 14.01 2.25 13.83 2.28 13.68 2.31 13.08 2.38 0 -0.4 17.79 2.18 16.81 2.25 16.50 2.31 16.26 2.35 16.06 2.38 15.39 2.
PERFORMANCE DATA High Static Ducted Maximum Heating Capacity Tables Maximum Heating Capacity Table for LH248HV4 (LHN248HV + LUU249HV) Table 42: LH248HV4 Ceiling-Concealed Duct (High Static) System Max Heating Capacity Table. Indoor Air Temp. °F DB Single Zone Ceiling-Concealed Ducted System Engineering Manual Outdoor Air Temp. 61 64 68 70 75 °F WB TC PI TC PI TC PI TC PI TC PI TC PI -13 -13.4 19.66 2.66 19.22 2.74 18.67 2.83 18.36 2.88 18.12 2.92 17.46 3.01 -4 -4.
PERFORMANCE DATA High Static Ducted Maximum Heating Capacity Tables Maximum Heating Capacity Table for LH368HV4 (LHN368HV + LUU369HV) Table 43: LH368HV4 Ceiling-Concealed Duct (High Static) System Max Heating Capacity Table. Indoor Air Temperature: °F DB Outdoor Air Temp. 61.0 64.0 68.0 70.0 72.0 75.0 °F WB TC PI TC PI TC PI TC PI TC PI TC PI -13 -13.4 22.28 4.35 21.78 4.49 21.16 4.63 20.82 4.71 20.54 4.78 19.79 4.92 -4 -4.4 29.24 4.65 28.58 4.80 27.77 4.96 27.
CEILING-CONCEALED DUCTED UNIT APPLICATION GUIDELINES Equipment Selection Procedure on page 65 Placement Considerations on page 67 Clearances on page 77 Installing Outdoor Unit Indoors on page 80 Refrigerant Piping Design on page 82
EQUIPMENT SELECTION PROCEDURE Cooling / Heating Correction Factors Single Zone Ceiling-Concealed Ducted System Engineering Manual For Ceiling-Concealed Ducted 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 correction factors as shown below.
EQUIPMENT SELECTION PROCEDURE Defrost Correction Factor for Heating Operation The outdoor unit heating capacity may need to be adjusted for frost accumulation on air-cooled systems. If design day conditions are below the dewpoint of the surrounding air, frost may not be a problem and no correction factor is needed. In certain weather conditions, however, frost may form and accumulate on the air-cooled outdoor unit coil and impact the coils ability to transfer heat.
PLACEMENT CONSIDERATIONS Indoor Unit Selecting the Best Location for the Indoor Unit Single Zone Ceiling-Concealed Ducted System Engineering Manual Follow recommended best practices when choosing an indoor location for the single zone indoor unit. Dos • Place the unit where air circulation will not be blocked. • Locate the indoor unit in a location that is level, and where it can be easily connected to the outdoor unit. • Place the unit where drainage can be obtained easily.
PLACEMENT CONSIDERATIONS Indoor Unit Low Static Ducted IDU Service Space Required Dimensions, Bolt Locations Figure 45: Low Static Ducted Indoor Unit General Service Space Required Dimensions and Bolt Locations Top view E (Unit : Inch) G D C Control box Access Opening ( 23-5/8 x 23-5/8 ) 23-5/8 J A B (Unit : Inch) H = ≤25/32 H • "H" dimension is necessary to ensure a slope is included for condensate drainage. Drainage hole Table 48: Low Static Ducted Indoor Unit Bolt Location Dimensions.
PLACEMENT CONSIDERATIONS Indoor Unit High Static Ducted IDU Service Space Required Dimensions, Bolt Locations Single Zone Ceiling-Concealed Ducted System Engineering Manual Figure 47: High Static Ducted Indoor Unit Bolt Locations. Table 50: High Static Ducted Indoor Unit Bolt Location Dimensions.
PLACEMENT CONSIDERATIONS Indoor Unit Figure 49: Indoor Unit Drain Piping. Indoor Unit Drain System • Drain piping must have downward gradient of at least 1/50 to 1/100; to prevent reverse flow, slope must not be straight up and down. • Do not damage the drain port on the indoor unit when connecting the field-supplied drain piping. • Drain piping specifications: - Indoor Unit Drain Connection: 1-1/4 inch outside diameter.
PLACEMENT CONSIDERATIONS Outdoor Unit Selecting the Best Location for the Outdoor Unit Do not install the unit in an area where combustible gas may generate, flow, stagnate, or leak. These conditions can cause a fire, resulting in bodily injury or death. • Do not install the unit in a location where acidic solution and spray (sulfur) are often used as it can cause bodily injury or death.
PLACEMENT CONSIDERATIONS Outdoor Unit Outdoor Unit Condensate Drain Piping Single Zone Ceiling-Concealed Ducted System Engineering Manual Outdoor unit requires condensate drain piping. Condensate drain pipe is constructed with materials approved by local code. See Placement Considerations for information in reference to outdoor unit placement.
PLACEMENT CONSIDERATIONS Outdoor Unit Underground Refrigerant Piping Refrigerant pipe installed underground must be routed inside a vapor tight protective sleeve to prevent insulation deterioration and water infiltration. Refrigerant pipe installed inside underground casing must be continuous without any joints. Underground refrigerant pipe must be located at a level below the frost line. Table 53: Utility Conduit Sizes (Inches). Liquid Pipe1 3/8 (1-1/82,3) Vapor Pipe1 1/2 (2.
PLACEMENT CONSIDERATIONS Outdoor Unit Oceanside Applications Wind Protection If the outdoor unit is placed on a roof, position it with the compressor end (no coil surface) in the direction of the prevailing wind as shown in the figure at right. In cooler climates, it may be beneficial to position the unit in direct sunlight to assist with defrost operations.
PLACEMENT CONSIDERATIONS Outdoor Unit General Mounting Figure 57: Bracket Mounting. Single Zone Ceiling-Concealed Ducted System Engineering Manual Securely attach the outdoor unit to a condenser pad, base rails, or other mounting platform that is securely anchored to the ground or building structure. The underlying structure or foundation must be designed to support the weight of the unit, and avoid placing the outdoor unit in a low lying area where water may accumulate.
PLACEMENT CONSIDERATIONS Outdoor Unit Bolting the Outdoor Unit to the Platform Procedure When installing the outdoor unit onto a concrete or rigid mount, use a bolt and nut. 1. Ensure that the concrete platform will not degrade easily, and has enough 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.
CLEARANCES Outdoor Unit Single Zone Ceiling-Concealed Ducted System Engineering Manual 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. • Include enough space for airflow and for service access.
CLEARANCES Outdoor Unit Outdoor Unit (36,000 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.
CLEARANCES Outdoor Unit are obstacles on both suction Obstacles andthere on the Obstacles above and on above the Where and discharge sides (discharge side obstacle air discharge side. air discharge side. is higher than" the outdoor unit).
INSTALLING OUTDOOR UNITS INDOORS Installing Outdoor Units Indoors LG 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: • Lack of ground space. • Lack of an appropriate outdoor location that meets system design requirements. • When mounting on the roof is not an option due to a lack of roof space.
INSTALLING OUTDOOR UNITS INDOORS Single Zone Ceiling-Concealed Ducted System Engineering Manual 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.
REFRIGERANT PIPING DESIGN Design Guideline Summary Device Connection Limitations A single-zone ceiling-concealed ducted system consists of one outdoor unit and one indoor unit. One of the most critical elements of a single-zone ceiling-concealed ducted system is the refrigerant piping.
20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. Air Conditioning Technologies 4300 North Point Parkway Alpharetta, Georgia 30022 www.lghvac.
