A Indoor Unit Engineering Manual Art CoolTM Mirror Wall-Mounted Art CoolTM Gallery Wall-Mounted Four-Way Ceiling Cassette Ceiling-Concealed Duct (High Static) Indoor Units for Multi-Zone Heat Pump Systems 3/4 to 3 Tons
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. DFS-EM-AJ-002-US 013M09 For continual product development, LG reserves the right to change specifications without notice. ©LG Electronics Inc.
TABLE OF CONTENTS A About LG Electronics, Inc...................................................................... 4 Duct-Free Split Systems........................................................................ 4 Unit Nomenclature.................................................................................. 6 Outdoor Unit Overview.......................................................................... 7 Indoor Unit Overview............................................................................
Convergence of Technology, Innovation, Flexibility, & Style Multi F and Multi F MAX Indoor Unit Engineering Manual About LG Electronics, Inc. LG Electronics, Inc. is a global leader and technology innovator in consumer electronics, mobile communications, and home appliances, employing more than 213,000 people in more than 60 countries worldwide. LG Electronics, Inc. comprises five business units—Home Entertainment, Mobile Communications, Air Conditioning, Business Solutions, and Home Appliance.
Product Introduction “Unit Nomenclature” on page 6 “Outdoor Unit Overview” on page 7 “Indoor Unit Overview” on page 8 “Controls and Options Overview” on page 9
Unit Nomenclature A Multi-Zone Systems — Indoor Units and Outdoor Units L M AN 12 7 HVT M BD 36 2 0 Multi F and Multi F MAX Indoor Unit Engineering Manual L = LG Type: M = Multi-Zone Component: AN: Art Cool™ Wall-Mounted Indoor Unit N: Standard Wall-Mounted Indoor Unit CN: Four-Way Ceiling-Cassette Indoor Unit DN: Ceiling-Concealed Duct (Low Static) Indoor Unit HN: Ceiling-Concealed Duct (High Static) Indoor Unit VN: Vertical-Horizontal Air Handling Indoor Unit U: Outdoor Unit Nominal Capacity (
Outdoor Unit Overview A Table 1: Summary Data—Multi F / Multi F MAX Outdoor Units Outdoor Unit Type Model Number1 Dimensions (W x H x D) (inches) Nominal Cooling Capacity Btu/h2 Net Weight (lbs.) No. of Connectable Indoor Units3 Pipe Connections (inches, O.D.
Indoor Unit Overview A Table 2: Summary Data—Multi F Indoor Units. Indoor Unit Type Art CoolTM Mirror Wall-Mounted Nominal Cooling Capacity Btu/h2 Air Flow Rate (CFM) (H/M/L3) 9,000 247 / 230 / 212 12,000 335 / 318 / 300 LMAN187HVT 40-9/16 x 12-25/32 x 9-21/32 18,000 572 / 501 / 434 LMAN097HVP 9,000 272 / 208 / 155 Model Number1 LMAN097HVT Multi F and Multi F MAX Indoor Unit Engineering Manual LMAN127HVT Dimensions (W x H x D) (inches) 35-1/4 × 11-3/8 × 8-1/16 Net Weight (lbs.
Controls and Options Overview A Table 3: Summary Data—Zone Controllers. Zone Controller Name Simple Controller with Mode Selection Simple Controller with Mode Selection PQRCVCL0 AKB72955816 Black 1 White PQRCHCA0 Black PQRCHCA0QW 164 Allows control of indoor unit ON / OFF, operation mode, fan speed, and temperature setpoint for up to 16 indoor units. Included with Ceiling-Concealed Duct (High Static1) indoor units; optional accessory for all other indoor unit types.
Controls and Options Overview A Table 4: Summary Data— Zone Controller Communication Cables. Name Model No. Max. Wire Length (ft.) Wired Remote Group Control Cable Assembly PZCWRCG3 32 Required when grouping multiple indoor units with a single zone controller. Wired Remote / Group Control Extension Cable PZCWRC1 32 Increases the distance between a remote controller and an indoor unit, or between indoor units in a control group.
Controls and Options Overview A Table 6: Summary Data—Central Controllers (Connect to the Outdoor Unit Through the PI-485 Board (accessory, sold separately). No. of Binary Devices Systems Devices Comm. per per Signals Power / Central Controller Name Model No. per Comm. Description Comm.
Controls and Options Overview A Table 8: Indoor Units—Functions, Controls and Options. Airflow Operation Controllers Multi F and Multi F MAX Indoor Unit Engineering Manual Indoor Unit Type Air supply outlets Airflow direction (left/right) Airflow direction (up/down) Auto swing (left/right) Auto swing (up/down) Airflow steps (fan/cool/heat) Chaos wind (random fan speed) Jet-cool/heat Swirl wind Washable anti-fungal1 Plasma2 Ventilation Drain pump E.S.P.
Controls and Options Overview A Table 9: Multi F MAX Outdoor Unit Accessories Overview. Multi F MAX Accessory Name Model No. Two-Port Branch Distribution Unit PMBD3620 Distributes refrigerant from Multi F MAX outdoor unit from one (1) to two (2) indoor units (maximum 24,000 Btu/h for each port). Three-Port Branch Distribution Unit PMBD3630 Distributes refrigerant from Multi F MAX outdoor unit from one (1) to three (3) indoor units (maximum 24,000 Btu/h for each port).
Multi F and Multi F MAX Indoor Unit Engineering Manual A 14 | Introduction 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.
Art Cool Mirror Indoor Unit data ™ “Mechanical Specifications” on page 16 “General Data / Specifications” on page 17 “Dimensions” on page 18 “Cooling Capacity Table” on page 20 “Heating Capacity Table” on page 22 “Acoustic Data” on page 23 “Air Velocity and Temperature Distribution” on page 24 “Refrigerant Flow Diagram” on page 26 “Wiring Diagram” on page 27 “Factory Supplied Parts and Materials” on page 29 “Installation and Best Layout Practices” on page 30
Art Cool Mirror Indoor Units Mechanical Specifications and Features A Figure 1: Multi F Art Cool Mirror Wall-Mounted Indoor Unit. ART COOL Mirror Wall-Mounted Indoor Units General Multi F and Multi F MAX Indoor Unit Engineering Manual All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. ART COOL Mirror Wall-Mounted indoor units have a sound rating no higher than 39 dB(A) as tested per KSA0701 ISO Standard 3745.
Art Cool Mirror Indoor Units General Data / Specifications A Table 11: Multi F Art Cool Mirror Indoor Unit General Data. Model Name Nominal Capacity (Btu/h) 1 LMAN097HVT LMAN127HVT LMAN187HVT 9,000 12,000 18,000 57-77 57-77 57-77 59-81 59-81 59-81 Cross Flow Cross Flow Cross Flow Operating Range Cooling (°F WB) Heating (°F DB) Fan Type Motor Output (W) x Qty. Motor/Drive Airflow Rate CFM (H/M/L) 14.4 x 1 14.4 x 1 76.
Art Cool Mirror Indoor Units Dimensions A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 2: LMAN097HVT and LMAN127HVT Dimensions. 18 | Art Cool Mirror 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.
Art Cool Mirror Indoor Units Dimensions A Figure 3: LMAN187HVT Dimensions. Art Cool Mirror™ 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.
Art Cool Mirror Indoor Units Cooling Capacity Table A Table 12: Multi F Art Cool Mirror Indoor Units Cooling Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 14 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 | Art Cool Mirror 6.04 6.09 6.13 6.18 6.23 6.28 6.32 6.37 6.42 6.46 6.51 6.56 6.
Art Cool Mirror Indoor Units Cooling Capacity Table A Table 13: Multi F Art Cool Mirror Indoor Units Cooling Capacity Table (continued). Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 17.65 17.63 17.62 17.60 17.59 17.58 17.56 17.55 17.54 17.52 17.51 17.50 17.08 16.66 16.24 15.82 15.37 14.99 14.62 14.24 13.87 13.65 13.57 12.33 12.43 12.52 12.62 12.71 12.81 12.90 13.00 13.10 13.19 13.29 13.38 13.16 12.93 12.70 12.46 12.33 12.00 11.67 11.27 10.93 10.85 10.
Art Cool Mirror Indoor Units Heating Capacity Table A Table 14: Multi F Art Cool Mirror Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) Outdoor Air Temp. °F DB °F WB 61 TC 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 -0.4 4.5 9 15 19 23 28 32 36 41 43 46 51 56 59 64 -0.4 4.
Art Cool Mirror Indoor Units Acoustic Data A Figure 4: Sound Pressure Level Measurement Location. • Measurement taken 2.6′ below the bottom of the unit and at a distance of 3.3′ from face of unit. • 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.
Art Cool Mirror Indoor Units Air Velocity and Temperature Distribution A Figure 6: LMAN097HVT Air Velocity and Temperature Distribution Charts. Cooling Discharge angle : 40° Heating Discharge angle : 50° Air velocity [ft/s] Air velocity [ft/s] 9ft 9ft Multi F and Multi F MAX Indoor Unit Engineering Manual 7ft 7ft 6.6 4.9 4.9 3ft 3.3 1.6 16ft 13ft 10ft 7ft 3ft 3.3 1.
Art Cool Mirror Indoor Units Air Velocity and Temperature Distribution A Figure 8: LMAN187HVT Air Velocity and Temperature Distribution Charts. Cooling Discharge angle : 40° Discharge angle : 50° Air velocity [ft/s] Air velocity [ft/s] 8.2 1.6 26ft 23ft 20ft Heating 16ft 13ft 10ft 7ft 9ft 7ft 7ft 3ft 4.9 3.3 9ft 3ft 0ft 0ft 3.3 1.6 26ft 23ft 20ft 16ft 13ft 10ft 7ft 3ft 6.6 4.
Art Cool Mirror Indoor Units Refrigerant Flow Diagram A Figure 9: Art Cool Mirror Indoor Unit Refrigerant Flow Diagram.
Art Cool Mirror Indoor Units Wiring Diagram A Figure 10: Multi F Art Cool Mirror LMAN097HVT and LMAN127HVT Indoor Units Wiring Diagram. Art Cool Mirror™ 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.
Art Cool Mirror Indoor Units Wiring Diagram A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 11: Multi F Art Cool Mirror LMAN187HVT Indoor Unit Wiring Diagram. 28 | Art Cool Mirror 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.
Art Cool Mirror Indoor Units Factory Supplied Parts and Materials A Factory Supplied Parts Table 18: Parts Table.
Art Cool Mirror Indoor Units Installation and Best Layout Practices A Selecting the Best Location Figure 12: Minimum Clearance Requirements. • • • • • • >4 inches Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient space from the ceiling and floor. Ensure there is sufficient maintenance space.
Art Cool Mirror Indoor Units Installation and Best Layout Practices A Preparing for Installation Figure 16: Preparing for Installation. Prepare the refrigerant piping and drain hose (indoor unit piping) for installation through the wall: press on the top of the tubing clamp and slowly guide the piping / hose down (depending on installation requirements, then to the left or right). Relock the tubing clamp after the piping / hose are released.
Art Cool Mirror Indoor Units Installation and Best Layout Practices A Connecting the Indoor Unit Piping to the Field-Installed Piping 1. Center align the indoor unit piping (refrigerant and drain) and the field-installed piping, then hand tighten the flare nut. Figure 23: Indoor Unit to Field-Installed Piping Connection. 2. Tighten the flare nut with a torque wrench. Multi F and Multi F MAX Indoor Unit Engineering Manual 3. Attach the drain tube piping to the indoor unit drain hose as shown.
Art Cool Mirror Indoor Units Installation and Best Layout Practices A Power Wiring / Communications Cable Guidelines • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
Art Cool Mirror Indoor Units Installation and Best Layout Practices A Controller Options Art Cool Mirror wall-mounted indoor units include a wireless handheld controller (AKB73635606), but optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s Introduction section). Multi F and Multi F MAX Indoor Unit Engineering Manual Wireless Handheld Controller Figure 31: AKB73635606 Wireless Handheld Controller.
Art Cool Mirror Indoor Units Installation and Best Layout Practices A Wired Controller Connections GRN / YLW To Outdoor Unit or Branch Distribution Unit (Multi F MAX Systems Only) To Wired Controller To Outdoor Unit or Branch Distribution Unit (Multi F MAX Systems Only) Wired controllers include a sensor to detect room temperature.
Art Cool Mirror Indoor Units Installation and Best Layout Practices Hanging the Wired Controller Multi F and Multi F MAX Indoor Unit Engineering Manual 1. The controller wiring / cable can be installed in one of three directions: top, back, or on the right side. If top or right side installation is desired, remove cable guide grooves on the controller, and then position wiring / cable on applicable side. A Figure 35: Removing the Cable Guide Grooves. Top Top Back Right Side Right Side 2.
Art Cool Gallery Indoor Unit data ™ “Mechanical Specifications” on page 38 “General Data / Specifications” on page 39 “Dimensions” on page 40 “Cooling Capacity Table” on page 41 “Heating Capacity Table” on page 42 “Acoustic Data” on page 43 “Air Velocity and Temperature Distribution” on page 44 “Refrigerant Flow Diagram” on page 45 “Wiring Diagram” on page 46 “Factory Supplied Parts and Materials” on page 47 “Installation and Best Layout Practices” on page 48
Art Cool Gallery Indoor Units Mechanical Specifications and Features ART COOL Gallery Indoor Units General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Art Cool Gallery indoor units have a sound rating no higher than 42 dB(A) as tested per KSA0701 ISO Standard 3745.
Art Cool Gallery Indoor Units General Data / Specifications A Table 20: Multi F Art Cool Gallery Indoor Unit General Data. Model Name Nominal Capacity (Btu/h) 1 LMAN097HVP LMAN127HVP 9,000 12,000 57-77 57-77 59-81 59-81 Turbo Turbo Operating Range Cooling (°F WB) Heating (°F DB) Fan Type Motor Output (W) x Qty.
Art Cool Gallery Indoor Units Dimensions A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 40: LMAN097HVP and LMAN127HVP Dimensions. 40 | Art Cool Gallery™ 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.
Art Cool Gallery Indoor Units Cooling Capacity Table A Table 21: Multi F Art Cool Gallery Indoor Units Cooling Capacity Table. Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMAN097HVP 9,000 8.82 8.82 8.81 8.80 8.80 8.79 8.78 8.78 8.77 8.76 8.76 8.75 8.54 8.33 8.12 7.91 7.68 7.50 7.31 7.12 6.94 6.82 6.79 10.98 10.97 10.96 10.95 10.95 10.94 10.93 10.92 10.91 10.90 10.90 10.89 10.63 10.36 10.10 9.84 9.56 9.33 9.10 8.86 8.63 8.49 8.44 5.68 5.72 5.77 5.81 5.85 5.90 5.94 5.
Art Cool Gallery Indoor Units Heating Capacity Table A Table 22: Multi F Art Cool Gallery Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMAN097HVP 9,000 LMAN127HVP 12,000 Outdoor Air Temp. 61 TC Indoor Air Temp. °F DB 68 70 TC TC 72 TC 75 TC °F DB °F WB 0 -0.4 5.35 5.28 5.23 5.20 5.12 4.90 5 4.5 6.03 5.95 5.90 5.88 5.80 5.58 10 9 6.71 6.63 6.58 6.56 6.48 6.26 17 15 7.
Art Cool Gallery Indoor Units Acoustic Data A Figure 41: Sound Pressure Level Measurement Location. • Measurement taken 2.6′ below the bottom of the unit and at a distance of 3.3′ from face of unit. • 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.
Art Cool Gallery Indoor Units Air Velocity and Temperature Distribution A Figure 43: LMAN097HVP Air Velocity and Temperature Distribution Charts. Cooling Discharge angle: 40° Discharge angle: 50° Air velocity [ft/s] Air velocity [ft/s] Multi F and Multi F MAX Indoor Unit Engineering Manual Heating 9f t 9f t 7f t 7f t 6.6 6.6 16ft 13ft 10ft 4.9 3.3 1.6 7 ft 3f t 3f t 4.6 3f t 0f t 0f t 3.3 1.
Art Cool Gallery Indoor Units Refrigerant Flow Diagram A Figure 45: Art Cool Gallery Indoor Unit Refrigerant Flow Diagram. Gas pipe connection port (flare connection) Cooling Thermistor for Evaporator Outlet Temperature Turbo Fan M Art Cool Gallery™ Thermistor for Evaporator Inlet Temperature Thermistor for Indoor Air Temperature Heating Heat Exchanger Liquid pipe connection port (flare connection) Table 24: Art Cool Gallery Indoor Unit Refrigerant Pipe Connection Port Diameters. Model No.
Art Cool Gallery Indoor Units Wiring Diagram A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 46: Multi F Art Cool Gallery Indoor Units Wiring Diagram. 46 | Art Cool Gallery™ 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.
Art Cool Gallery Indoor Units Factory Supplied Parts and Materials A Factory Supplied Parts Table 26: Parts Table.
Art Cool Gallery Indoor Units Installation and Best Layout Practices Selecting the Best Location A Figure 47: Minimum Clearance Requirements. Multi F and Multi F MAX Indoor Unit Engineering Manual Do’s • • • • • • Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient space from the ceiling and floor. Ensure there is sufficient maintenance space.
Art Cool Gallery Indoor Units Installation and Best Layout Practices A Preparing the Indoor Unit for Installation Removing the Front Panel Figure 49: Preparing for Installation. 1A 1B 2A 2B 1. First pull the top of the front panel up (1A) and then out (1B). 2. Remove the two (2) screws at the bottom (2A), then lift off the front panel (2B). 3. To completely detach the front panel, disconnect the panel connector found at the top of the indoor unit (3).
Art Cool Gallery Indoor Units Installation and Best Layout Practices A Preparing the Refrigerant and Drain Piping Connections Figure 52: Preparing the Refrigerant / Drain Connections. 1. Depending on the installation requirements, route the indoor unit refrigerant piping and the drain hose to the left, right (see guidelines below), or rear of the frame. 1 Multi F and Multi F MAX Indoor Unit Engineering Manual 2. Bundle the piping and drain hose with tape where they meet near the indoor unit frame.
Art Cool Gallery Indoor Units Installation and Best Layout Practices A Connecting the Indoor Unit Piping to the Field-Installed Piping 1. Center align the indoor unit piping (refrigerant and drain) and the field-installed piping, then hand tighten the flare nut. Figure 55: Indoor Unit to Field-Installed Piping Connection. 2. Tighten the flare nut with a torque wrench. 3. Attach the drain tube piping to the indoor unit drain hose as shown below. Figure 56: Extending the Drain Hose.
Art Cool Gallery Indoor Units Installation and Best Layout Practices A • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications. It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist.
Art Cool Gallery Indoor Units Installation and Best Layout Practices A Controller Options Art Cool Gallery wall-mounted indoor units include a wireless handheld controller (AKB73635607), but optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s Introduction section). Wireless Handheld Controller Figure 62: AKB73635607 Wireless Handheld Controller. Table 27: AKB73635607 Wireless Handheld Controller Functions.
Art Cool Gallery Indoor Units Installation and Best Layout Practices A Wired Controller Connections Figure 63: Wired Controller Connection on the Indoor Unit Terminal Block. Indoor Unit Terminal Block CN-REMO 3(C) RD BL 1(L1 ) 2(L2) BR GRN / YLW Multi F and Multi F MAX Indoor Unit Engineering Manual GND To Outdoor Unit or Branch Distribution Unit (Multi F MAX Systems Only) To Wired Controller Figure 64: Proper Location for the Wired Controller.
Art Cool Gallery Indoor Units Installation and Best Layout Practices A Assigning the Thermistor for Temperature Detection Each indoor unit includes a return air thermistor assigned to sense the temperature. If a wired controller is installed, there is a choice of sensing temperature with either the indoor unit return air thermistor or the thermistor in the wired controller.
Multi F and Multi F MAX Indoor Unit Engineering Manual A 56 | Art Cool Gallery™ 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.
Standard Wall-Mounted Indoor Unit data “Mechanical Specifications” on page 58 “General Data / Specifications” on page 59 “Dimensions” on page 60 “Cooling Capacity Table” on page 62 “Heating Capacity Table” on page 64 “Acoustic Data” on page 65 “Air Velocity and Temperature Distribution” on page 66 “Refrigerant Flow Diagram” on page 68 “Wiring Diagram” on page 69 “Factory Supplied Parts and Materials” on page 71 “Installation and Best Layout Practices” on page 72
Standard Wall-Mounted Indoor Units Mechanical Specifications and Features A Standard Wall-Mounted Indoor Units Figure 69: Multi F Standard Wall-Mounted Indoor Unit. General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Standard WallMounted units have a sound rating no higher than 39 dB(A) as tested per KSA0701 ISO Standard 3745.
Standard Wall-Mounted Indoor Units General Data / Specifications A Table 28: Multi F Standard Wall-Mounted Indoor Unit General Data. Model Name Nominal Capacity (Btu/h) 1 LMN097HVT LMN127HVT LMN187HVT 9,000 12,000 18,000 57-77 57-77 57-77 59-81 59-81 59-81 Cross Flow Cross Flow Cross Flow Operating Range Cooling (°F WB) Heating (°F DB) Fan Type Motor Output (W) x Qty. 14.4 x 1 14.4 x 1 76.
Standard Wall-Mounted Indoor Units Dimensions A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 70: LMN097HVT and LMN127HVT Dimensions. 60 | Std. Wall-Mounted 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.
Standard Wall-Mounted Indoor Units Dimensions A Figure 71: LMN187HVT Dimensions. Standard Wall-Mounted 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. Std.
Standard Wall-Mounted Indoor Units Cooling Capacity Table A Table 29: Multi F Standard Wall-Mounted Indoor Units Cooling Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 14 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 | Std. Wall-Mounted 6.04 6.09 6.13 6.18 6.23 6.28 6.32 6.37 6.42 6.
Standard Wall-Mounted Indoor Units Cooling Capacity Table A Table 30: Multi F Standard Wall-Mounted Indoor Units Cooling Capacity Table (continued). Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 17.65 17.63 17.62 17.60 17.59 17.58 17.56 17.55 17.54 17.52 17.51 17.50 17.08 16.66 16.24 15.82 15.37 14.99 14.62 14.24 13.87 13.65 13.57 12.33 12.43 12.52 12.62 12.71 12.81 12.90 13.00 13.10 13.19 13.29 13.38 13.16 12.93 12.70 12.46 12.33 12.00 11.67 11.27 10.93 10.85 10.
Standard Wall-Mounted Indoor Units Heating Capacity Table A Table 31: Multi F Standard Wall-Mounted Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMN097HVT 9,000 LMN127HVT 12,000 LMN187HVT 18,000 Outdoor Air Temp. °F DB °F WB 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 -0.4 4.
Standard Wall-Mounted Indoor Units Acoustic Data A Figure 72: Sound Pressure Level Measurement Location. • Measurement taken 2.6′ below the bottom of the unit and at a distance of 3.3′ from face of unit. • 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.
Standard Wall-Mounted Indoor Units Air Velocity and Temperature Distribution A Figure 74: LMN097HVT Air Velocity and Temperature Distribution Charts. Cooling Discharge angle : 40° Heating Discharge angle : 50° Air velocity [ft/s] Air velocity [ft/s] 9f t 9f t Multi F and Multi F MAX Indoor Unit Engineering Manual 7f t 7f t 6.6 4.9 4.9 3f t 3.3 1.6 16ft 13ft Temperature 10f t 7 ft 3f t 3.3 1.
Standard Wall-Mounted Indoor Units Air Velocity and Temperature Distribution A Figure 76: LMN187HVT Air Velocity and Temperature Distribution Charts. Cooling Heating Discharge angle : 40° Discharge angle : 50° Air velocity [ft/s] Air velocity [ft/s] 8.2 1.6 26ft 23ft 16ft 13ft 10f t 7f t 7f t 3f t 4.9 3.3 7 ft 9f t 3f t 0f t 0f t [°F] 3.3 1.6 26ft 23ft Temperature 20ft 16ft 13ft 10f t 7 ft 3f t 6.6 4.
Standard Wall-Mounted Indoor Units Refrigerant Flow Diagram A Figure 77: Multi F Standard Wall-Mounted Indoor Unit Refrigerant Flow Diagram.
Standard Wall-Mounted Indoor Units Wiring Diagram A Figure 78: Multi F Standard Wall-Mounted LMN097HVT and LMN127HVT Indoor Units Wiring Diagram. Standard Wall-Mounted 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. Std.
Standard Wall-Mounted Indoor Units Wiring Diagram A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 79: Multi F Standard Wall-Mounted LMN187HVT Indoor Units Wiring Diagram. 70 | Std. Wall-Mounted 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.
Standard Wall-Mounted Indoor Units Factory Supplied Parts and Materials A Factory Supplied Parts Table 35: Parts Table.
Standard Wall-Mounted Indoor Units Installation and Best Layout Practices A Selecting the Best Location Figure 80: Minimum Clearance Requirements. • • • • • • >4 inches Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient space from the ceiling and floor. Ensure there is sufficient maintenance space.
Standard Wall-Mounted Indoor Units Installation and Best Layout Practices A Preparing for Installation Figure 84: Preparing for Installation. Prepare the refrigerant piping and drain hose (indoor unit piping) for installation through the wall: press on the top of the tubing clamp and slowly guide the piping / hose down (depending on installation requirements, then to the left or right). Relock the tubing clamp after the piping / hose are released.
Standard Wall-Mounted Indoor Units Installation and Best Layout Practices A Connecting the Indoor Unit Piping to the Field-Installed Piping 1. Center align the indoor unit piping (refrigerant and drain) and the field-installed piping, then hand tighten the flare nut. Figure 91: Indoor Unit to Field-Installed Piping Connection. 2. Tighten the flare nut with a torque wrench. Multi F and Multi F MAX Indoor Unit Engineering Manual 3. Attach the drain tube piping to the indoor unit drain hose as shown.
Standard Wall-Mounted Indoor Units Installation and Best Layout Practices A Power Wiring / Communications Cable Guidelines • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
Standard Wall-Mounted Indoor Units Installation and Best Layout Practices A Controller Options Standard wall-mounted indoor units include a wireless handheld controller (AKB73635606), but optional LG-supplied wired controllers are available (see Controls and Options overview on pages XX to XX in this manual’s Introduction section). Multi F and Multi F MAX Indoor Unit Engineering Manual Wireless Handheld Controller Figure 99: AKB73635606 Wireless Handheld Controller.
Standard Wall-Mounted Indoor Units Installation and Best Layout Practices A To Outdoor Unit or Branch Distribution Unit (Multi F MAX Systems Only) To Wired Controller Indoor Unit Terminal Block GND 1(L1 ) 2(L2) CN-REMO 4 RD 3 BL CN-REMO Figure 101: Wired Controller Connection on the Indoor Unit Terminal Block—LMN187HVT models. GRN / YLW 3(C) RD BL 1(L1 ) 2(L2) BR GRN / YLW Figure 100: Wired Controller Connection on the Indoor Unit Terminal Block—LMN097HVT and LMAN127HVT models.
Standard Wall-Mounted Indoor Units Installation and Best Layout Practices A Assigning the Thermistor for Temperature Detection Multi F and Multi F MAX Indoor Unit Engineering Manual Each indoor unit includes a return air thermistor assigned to sense the temperature. If a wired controller is installed, there is a choice of sensing temperature with either the indoor unit return air thermistor or the thermistor in the wired controller.
Ceiling-Concealed Duct (Low Static) indoor Unit data “Mechanical Specifications” on page 80 “General Data / Specifications” on page 81 “Dimensions” on page 82 “Cooling Capacity Table” on page 84 “Heating Capacity Table” on page 86 “External Static Pressure” on page 87 “Acoustic Data” on page 88 “Refrigerant Flow Diagram” on page 89 “Wiring Diagram” on page 91 “Factory Supplied Parts and Materials” on page 92 “Installation and Best Layout Practices” on page 93
Duct (Low Static) Indoor Units Mechanical Specifications and Features Ceiling-Concealed Duct (Low Static) Indoor Unit A Figure 107: Ceiling-Concealed Duct (Low Static) Indoor Unit. Multi F and Multi F MAX Indoor Unit Engineering Manual General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor.
Duct (Low Static) Indoor Units General Data / Specifications A Table 37: Multi F Ceiling-Concealed Low-Static Ducted Indoor Unit General Data.
Duct (Low Static) Indoor Units Dimensions A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 108: LMDN095HV and LMDN125HV Dimensions. 82 | Duct (Low Static) 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.
Duct (Low Static) Indoor Units Dimensions A Figure 109: LMDN185HV Dimensions. Ceiling-Concealed Duct (Low Static) 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.
Duct (Low Static) Indoor Units Cooling Capacity Table A Table 38: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Cooling Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMDN095HV 9,000 LMDN125HV 12,000 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 14 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 8.82 8.82 8.81 8.80 8.
Duct (Low Static) Indoor Units Cooling Capacity Table A Table 39: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Cooling Capacity Table (continued). Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) 17.65 17.63 17.62 17.60 17.59 17.58 17.56 17.55 17.54 17.52 17.51 17.50 17.08 16.66 16.24 15.82 15.37 14.99 14.62 14.24 13.87 13.65 13.57 13.04 13.14 13.24 13.34 13.44 13.54 13.65 13.75 13.85 13.95 14.05 14.15 13.91 13.68 13.43 13.17 13.04 12.69 12.34 11.92 11.56 11.
Duct (Low Static) Indoor Units Heating Capacity Table A Table 40: Multi F Ceiling-Concealed Duct (Low Static) Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) Outdoor Air Temp. °F DB °F WB 61 TC 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 0 5 10 17 20 25 30 35 40 45 47 50 55 60 63 68 -0.4 4.5 9 15 19 23 28 32 36 41 43 46 51 56 59 64 -0.4 4.
Duct (Low Static) Indoor Units External Static Pressure A Table 41: Multi F Ceiling-Concealed Duct (Low Static) External Static Pressure Setting Values Table. Static Pressure (in. wg) Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMDN095HV 9,000 LMDN185HV 18,000 0.04 Airflow Rate / CFM 0.08 0.12 0.
Duct (Low Static) Indoor Units Acoustic Data A • 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)±3. • Tested in anechoic chamber per ISO Standard 3745. 4.9 ft. Ceiling 6.6 ft. Table 42: Sound Pressure Levels (dB[A]).
Duct (Low Static) Indoor Units Refrigerant Flow Diagrams A Figure 112: LMDN095HV and LMDN125HV Refrigerant Flow Diagram.
Duct (Low Static) Indoor Units Refrigerant Flow Diagrams A Figure 113: LMDN185HV Refrigerant Flow Diagram.
Duct (Low Static) Indoor Units Wiring Diagram A Figure 114: Multi F Ceiling-Concealed Duct (Low Static) LMDN095HV, LMDN125HV, and LMDN185HV Indoor Units Wiring Diagram. Ceiling-Concealed Duct (Low Static) 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.
Duct (Low Static) Indoor Units Factory Supplied Parts and Materials A Factory Supplied Parts Multi F and Multi F MAX Indoor Unit Engineering Manual Table 47: Parts Table.
Duct (Low Static) Indoor Units Installation and Best Layout Practices A Selecting the Best Location Do’s • • • • • • Place the unit where air circulation will not be blocked. Place the unit where drainage can be obtained easily. Place the unit where noise prevention is taken into consideration. Ensure there is sufficient strength to bear the load of the indoor unit. Ensure there is sufficient maintenance space.
Duct (Low Static) Indoor Units Installation and Best Layout Practices Table 50: Service Access Standards. No. of Service Access Points Distance Between False & Actual Ceilings (in.) More than 39-3/8 7-7/8 to 39-3/8 Less than 7-7/8 Duct (Low Static) Indoor Units can be installed in two ways: Figure 117: Air inlet from the back of the indoor unit.
Duct (Low Static) Indoor Units Installation and Best Layout Practices A Figure 122: Drain Connection. Installing the Drain System • Drain piping must have downward gradient of at least 1/50 to 1/100; to prevent reverse flow, slope should not be straight up and down. • Do not damage the drain port on the indoor unit when connecting the fieldsupplied drain piping.
Duct (Low Static) Indoor Units Installation and Best Layout Practices Checking the Drainage System A Figure 126: Checking the Drainage System. Multi F and Multi F MAX Indoor Unit Engineering Manual 1. Remove the air filter. 2. Check the drainage. • Spray water on the evaporator. • Verify that water flows through the indoor unit drain hose without leaking.
Duct (Low Static) Indoor Units Installation and Best Layout Practices A Power Wiring / Communications Cable Guidelines • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
Duct (Low Static) Indoor Units Installation and Best Layout Practices Controller Options A Wired Controller Ceiling-concealed duct (low static) indoor units include an LG-supplied wired controller (6711A20116R)1, but other optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s Introduction section). The wireless handheld controller (Model No. PQWRHQ0FDB) is also an optional accessory with use of the wired controller.
Duct (Low Static) Indoor Units Installation and Best Layout Practices A Figure 133: Removing the Cable Guide Grooves. Hanging the Wired Controller 1. The controller wiring / cable can be installed in one of three directions: top, back, or on the right side. If top or right side installation is desired, remove cable guide grooves on the controller, and then position wiring / cable on applicable side. Top Top Back Right Side Right Side 2.
Duct (Low Static) Indoor Units Installation and Best Layout Practices A Assigning Air Flow Figure 137: Controller External Static Pressure Setting Display. To assign an air flow for each fan speed, follow the steps below. Step 1: To access system installer setting mode, press and hold the temperature increase and mode selection buttons simultaneously for approximately three (3) seconds.
Ceiling-Concealed Duct (High Static) indoor Unit data “Mechanical Specifications” on page 102 “General Data / Specifications” on page 103 “Dimensions” on page 104 “Cooling Capacity Table” on page 105 “Heating Capacity Table” on page 106 “External Static Pressure” on page 107 “Acoustic Data” on page 107 “Refrigerant Flow Diagrams” on page 108 “Wiring Diagram” on page 109 “Factory Supplied Parts and Materials” on page 110 “Installation and Best Layout Practices” on page 110
Duct (High Static) Indoor Units Mechanical Specifications and Features Ceiling-Concealed Duct (High Static) Indoor Unit A Figure 139: Ceiling-Concealed Duct (High Static) Indoor Unit. Multi F and Multi F MAX Indoor Unit Engineering Manual General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Ceiling-Concealed Duct (High Static) units are designed for high-speed air volume against an external static pressure up to 0.
Duct (High Static) Indoor Units General Data / Specifications A Table 51: Multi F Ceiling-Concealed High-Static Ducted Indoor Unit General Data. Model Name Nominal Capacity (Btu/h) 1 LMHN240HV LMHN360HV 24,000 36,000 57-77 57-77 59-81 59-81 Sirocco Sirocco Operating Range Cooling (°F WB) Heating (°F DB) Fan Type 154 x 1 350 x 1 Brushless Digitally Controlled / Direct Brushless Digitally Controlled / Direct 688 / 618 / 530 1,130 / 953 / 706 0.16 0.
Duct (High Static) Indoor Units Dimensions A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 140: LMHN240HV and LMHN360HV Dimensions. 104 | Duct (High Static) 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.
Duct (High Static) Indoor Units Cooling Capacity Table A Table 52: Multi F Ceiling-Concealed Duct (High Static) Indoor Units Cooling Capacity Table. Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMHN360HV 36,000 23.53 23.51 23.49 23.47 23.46 23.44 23.42 23.40 23.38 23.37 23.35 23.33 22.77 22.21 21.65 21.09 20.49 19.99 19.49 18.99 18.49 18.19 18.10 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 33.31 32.48 31.64 30.74 29.99 29.24 28.49 27.
Duct (High Static) Indoor Units Heating Capacity Table A Table 53: Multi F Ceiling-Concealed Duct (High Static) Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMHN240HV 24,000 LMHN360HV 36,000 Outdoor Air Temp. 61 TC Indoor Air Temp. °F DB 68 70 TC TC 72 TC 75 TC °F DB °F WB 0 -0.4 13.89 13.70 13.57 13.50 13.30 12.72 5 4.5 15.65 15.46 15.33 15.26 15.07 14.48 10 9 17.41 17.22 17.
Duct (High Static) Indoor Units External Static Pressure / Acoustic Data A Table 54: Multi F Ceiling-Concealed Duct (High Static) External Static Pressure Setting Values Table. Static Pressure (in. wg) 0.1 0.16 0.23 0.31 Model No. / Nominal Capacity Airflow Rate / CFM of Indoor Unit (Btu/h) High Mid Low High Mid Low LMHN240HV 24,000 LMHN360HV 36,000 688 618 530 1,130 953 706 0.39 0.47 0.55 0.62 0.70 0.78 140 137 134 160 152 141 147 144 141 - 154 151 148 - 160 157 154 - Setting Value (in.
Duct (High Static) Indoor Units Refrigerant Flow Diagrams A Figure 143: LMHN240HV and LMHN360HV Refrigerant Flow Diagram.
Duct (High Static) Indoor Units Wiring Diagrams A Figure 144: Multi F Ceiling-Concealed Duct (High Static) LMHN240HV Indoor Units Wiring Diagram. : Factory Wiring : Field Wiring : OPTION Ceiling-Concealed Duct (High Static) Figure 145: Multi F Ceiling-Concealed Duct (High Static) LMHN360HV Indoor Units Wiring Diagram. : Factory Wiring : Field Wiring : OPTION Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc.
Duct (High Static) Indoor Units Factory Supplied Parts and Materials / Installation A Factory Supplied Parts Multi F and Multi F MAX Indoor Unit Engineering Manual Table 58: Parts Table.
Duct (High Static) Indoor Units Installation and Best Layout Practices A If the unit is installed near a body of water, certain components are at risk of being corroded. Appropriate anti-corrosion methods should be taken for the unit and all components. Installing in an Area Exposed to Unconditioned Air In some installation applications, areas (floors, walls) in some rooms may be exposed to unconditioned air (room may be above or next to an unheated garage or storeroom).
Duct (High Static) Indoor Units Installation and Best Layout Practices A Preparing the Installation Area and Hanging the Indoor Unit Frame 1. Select and mark the area for the suspension or console bolts (use embedded inserts or anchor bolts in new buildings, and hole-inanchors in older buildings). 3. Add the set-anchor and the plate washer to the bolts (bolts should be at least 13/32 inches in diameter), and then insert the bolts into the installation area. Figure 148: Preparing the Installation Area.
Duct (High Static) Indoor Units Installation and Best Layout Practices A Checking the Drain Pump Figure 153: Checking the drain pump. The unit uses a drain pump to remove condensate. The pump must be tested before the system operates. • Connect (field supplied) flexible drain hose to the field-installed drain piping; leave it as is until the test is complete. • Pour water into the flexible drain hose and check for leaks.
Duct (High Static) Indoor Units Installation and Best Layout Practices A Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications. It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist.
Terminal Block Control Box Duct (High Static) Indoor UnitsA Installation and Best Layout Practices A Using a Conduit 1. Remove the rubber stopper on the indoor unit. Pass the power wiring / communications cable through the conduit, the conduit mounting plate, and to / through the control panel of the indoor unit. Control Box Cover Figure 158: Exterior View of Conduit Installation. Lock nut Conduit Conduit mounting plate 2.
Duct (High Static) Indoor Units Installation and Best Layout Practices A Wired Controller Placement Multi F and Multi F MAX Indoor Unit Engineering Manual 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.
Duct (High Static) Indoor Units Installation and Best Layout Practices A External Static Pressure Control To provide a required air flow rate that accounts for the external static pressure change, follow the steps below. Figure 166: Controller External Static Pressure Setting Display. 1. To access system installer setting mode, press and hold the temperature increase and mode selection buttons simultaneously for approximately three (3) seconds.
Duct (High Static) Indoor Units Installation and Best Layout Practices Assigning Air Flow To assign an air flow for each fan speed, follow the steps below. 1. To access system installer setting mode, press and hold the temperature increase and mode selection buttons simultaneously for approximately three (3) seconds. Choose setting code value “03” by pressing the mode selection button. A Figure 167: Controller External Static Pressure Setting Display.
Four-Way Ceiling-Cassette Indoor Unit data “Mechanical Specifications” on page 120 “General Data / Specifications” on page 121 “Dimensions” on page 122 “Cooling Capacity Table” on page 124 “Heating Capacity Table” on page 125 “Acoustic Data” on page 126 “Air Velocity and Temperature Distribution” on page 127 “Refrigerant Flow Diagram” on page 128 “Wiring Diagram” on page 129 “Factory Supplied Parts and Materials” on page 130 “Installation and Best Layout Practices” on page 131
Four-Way Ceiling Cassette Indoor Units Mechanical Specifications and Features Four-Way Ceiling-Cassette Indoor Units General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Four-way ceilingcassette units have a sound rating no higher than 38 dB(A) as tested per KSA0701 ISO Standard 3745.
Four-Way Ceiling-Cassette Indoor Units General Data / Specifications A Table 61: Multi F Four-Way Ceiling-Cassette Indoor Unit General Data. Model Name Nominal Capacity (Btu/h) 1 LMCN125HV LMCN185HV 12,000 18,000 57-77 57-77 59-81 59-81 Turbo Turbo Operating Range Cooling (°F WB) Heating (°F DB) Fan Type Motor Output (W) x Qty.
Four-Way Ceiling Cassette Indoor Units Dimensions A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 169: LMCN125HV Dimensions. 122 | Ceiling-Cassette 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.
Four-Way Ceiling-Cassette Indoor Units Dimensions A Figure 170: LMCN185HV Dimensions. Four-Way Ceiling-Cassette 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.
Four-Way Ceiling Cassette Indoor Units Cooling Capacity Table A Table 62: Multi F Four-Way Ceiling-Cassette Indoor Units Cooling Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMCN125HV 12,000 LMCN185HV 18,000 14 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 118 122 14 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 11.76 11.75 11.75 11.74 11.
Four-Way Ceiling-Cassette Indoor Units Heating Capacity Table A Table 63: Multi F Four-Way Ceiling-Cassette Indoor Units Heating Capacity Table. Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMCN125HV 12,000 61 TC 64 TC Indoor Air Temp. °F DB 68 70 TC TC 72 TC 75 TC °F DB °F WB 0 -0.4 7.10 7.00 6.93 6.90 6.80 6.50 5 4.5 8.00 7.90 7.83 7.80 7.70 7.40 10 9 8.90 8.80 8.73 8.70 8.60 8.30 17 15 10.10 10.00 9.93 9.90 9.80 9.48 20 19 10.55 10.45 10.38 10.35 10.
Four-Way Ceiling-Cassette Indoor Units Acoustic Data A • Measurement taken 4.9′ away from the unit. • 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)±3. • Tested in anechoic chamber per ISO Standard 3745. Ceiling 4.9 ft.
Four-Way Ceiling Cassette Indoor Units Air Velocity and Temperature Distribution A Figure 173: LMCN125HV Air Velocity and Temperature Distribution Charts. Cooling Discharge angle: 40° Heating Discharge angle: 50° Air velocity [ft/s] Air velocity [ft/s] 9f t 6.6 6.6 4.9 6.6 4.9 7ft 4.9 3.3 3.3 3.3 1.6 8f t 7f t 3.3 1.6 3ft 9f t 6.6 4.9 3f t 1.6 1.
Four-Way Ceiling-Cassette Indoor Units Refrigerant Flow Diagram A Figure 175: Multi F Four-Way Ceiling-Cassette Indoor Unit Refrigerant Flow Diagram.
Four-Way Ceiling Cassette Indoor Units Wiring Diagram A Figure 176: Multi F Four-Way Ceiling-Cassette Indoor Unit Wiring Diagram. Four-Way Ceiling-Cassette 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.
Four-Way Ceiling-Cassette Indoor Units Factory Supplied Parts and Materials A Factory Supplied Parts Multi F and Multi F MAX Indoor Unit Engineering Manual Table 67: Parts Table.
Four-Way Ceiling Cassette Indoor Units Installation and Best Layout Practices A Selecting the Best Location Figure 177: Indoor Unit Clearance Requirements. ≥19-11/16 inches Installing in a High or Dropped Ceiling High or dropped ceilings, often found in commercial buildings and offices, may cause a wide temperature differentiation. To countermeasure: • Change the indoor unit mode selection to allow for higher ceilings (see table). • Install an air circulator.
Four-Way Ceiling-Cassette Indoor Units Installation and Best Layout Practices Installing Multiple Indoor Units in One Area Ensure there is enough space between indoor units, lighting fixtures, and ventilation fans / systems. A Figure 179: Installing Multiple Indoor Units. Indoor unit Indoor unit Ventilator Lighting >59-1/16 inches >118-5/32 inches Figure 180: Ceiling Opening Dimensions and Bolt Locations.
Four-Way Ceiling Cassette Indoor Units Installation and Best Layout Practices A For New Ceilings For Existing Ceilings 1. Use anchors when installing the indoor unit in an existing ceiling. 2. Ceiling height is shown on the side of the installation guide (template). Adjust the height of the unit accordingly. Adjust the clearance before hanging the indoor unit. 3. Remove the temporary washer plate and position the indoor unit hanger brackets on the bolts.
Liquid Piping Connection Insulation for Refrigerant Piping Four-Way Ceiling-Cassette Indoor Units(Field-Supplied) Installation and Best Layout Practices Clamp for Insulation (Field-Supplied) Insulation (Field-Supplied) Insulating the Refrigerant and Drain Piping Refrigerant Piping Insulation Multi F and Multi F MAX Indoor Unit Engineering Manual Field-installed vapor and liquid refrigerant piping lines must be properly and completely covered in insulation (up to the indoor unit piping connections).
Four-Way Ceiling Cassette Indoor Units Installation and Best Layout Practices A Connecting the Power Wiring and Communications Cable Figure 187: Power Wiring and Communications Cable Connection Access. 1. To access the terminal block, open the control box cover. 2. Insert the power wiring / communications cable from the outdoor unit or branch distribution unit (Multi F MAX systems only) through the sides of the indoor unit and control box.
Four-Way Ceiling-Cassette Indoor Units Installation and Best Layout Practices A Controller Options Four-way ceiling-concealed indoor units include a wireless handheld controller (AKB73757604)1, but optional LG-supplied wired controllers are available (see Controls and Options overview on pages 9 to 12 in this manual’s introduction section). Wireless Handheld Controller Figure 190: AKB73757604 Wireless Handheld Controller.
Four-Way Ceiling Cassette Indoor Units Installation and Best Layout Practices A Wired Controller Placement Figure 192: Proper Location for the Wired Controller. 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.
Four-Way Ceiling-Cassette Indoor Units Installation and Best Layout Practices A PTVK430 Ventilation Kit Figure 196: PTVK430 Ventilation Kit. Multi F and Multi F MAX Indoor Unit Engineering Manual PTVK430 Ventilation Kit includes a flange for field-supplied ventilation pipe connection. Easily connects at the four-way ceiling-cassette three (3) inch fresh air knockout hole.
Vertical-Horizontal Air Handling Indoor Unit data “Mechanical Specifications” on page 140 “General Data / Specifications” on page 141 “Dimensions” on page 142 “Cooling Capacity Table” on page 143 “Heating Capacity Table” on page 144 “External Static Pressure” on page 145 “Acoustic Data” on page 146 “Refrigerant Flow Diagram” on page 147 “Wiring Diagram” on page 148 “Factory Supplied Parts and Materials” on page 150 “Installation and Best Layout Practices” on page 151
Vertical-Horizontal Indoor Units Mechanical Specifications and Features Vertical-Horizontal Air Handing Indoor Unit Multi F and Multi F MAX Indoor Unit Engineering Manual General All LG indoor units are factory assembled, wired, piped, and provided with a control circuit board, fan, and motor. Vertical-Horizontal Air Handling units are designed for high-speed air volume against an external static pressure up to 1.00″WG.
Vertical-Horizontal Indoor Units General Data / Specifications A Table 71: Multi F Vertical-Horizontal Air Handling Indoor Unit General Data.
Vertical-Horizontal Indoor Units Dimensions A Figure 200: LMVN240HV and LMVN360HV Dimensions. 18 17 D 12-1/8 W 1-9/16 H 1-15/16 1-15/16 Multi F and Multi F MAX Indoor Unit Engineering Manual 21-1/4 2-1/16 2-1/8 1-5/8 1-9/16 48-21/32 49-5/16 2-9/16 1-1/2 14-5/16 4-11/16 1-9/16 9-15/16 13 LMVN240HV LMVN360HV Model 18 W Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ.
Vertical-Horizontal Indoor Units Cooling Capacity Table A Table 72: Multi F Vertical-Horizontal Air Handling Indoor Units Cooling Capacity Table. Model No. / Air Nominal Capacity Outdoor Temp. of Indoor Unit (°F DB) (Btu/h) LMVN240HV 24,000 23.53 23.51 23.49 23.47 23.46 23.44 23.42 23.40 23.38 23.37 23.35 23.33 22.77 22.21 21.65 21.09 20.49 19.99 19.49 18.99 18.49 18.19 18.10 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 33.31 32.48 31.64 30.74 29.99 29.24 28.49 27.74 27.
Vertical-Horizontal Indoor Units Heating Capacity Table A Table 73: Multi F Vertical-Horizontal Air Handling Indoor Units Heating Capacity Table. Multi F and Multi F MAX Indoor Unit Engineering Manual Model No. / Nominal Capacity of Indoor Unit (Btu/h) LMVN240HV 24,000 LMVN360HV 36,000 Outdoor Air Temp. 61 TC Indoor Air Temp. °F DB 68 70 TC TC 72 TC 75 TC °F DB °F WB 0 -0.4 13.89 13.70 13.57 13.50 13.30 12.72 5 4.5 15.65 15.46 15.33 15.26 15.07 14.48 10 9 17.41 17.22 17.
Vertical-Horizontal Indoor Units External Static Pressure A Table 74: Multi F Vertical-Horizontal Air Handling Unit External Static Pressure Setting Values Table. Static Pressure (in. wg) 0.1 0.2 0.3 0.4 Model No. / Nominal Capacity Airflow Rate / CFM of Indoor Unit (Btu/h) LMVN240HV 24,000 LMVN360HV 36,000 High Mid Low High Mid Low 0.5 0.6 0.7 0.8 0.9 1.0 98 96 92 1032 103 101 982 962 922 1032 1032 1012 982 962 922 1032 1032 1012 982 962 922 1032 1032 1012 Setting Value at (in.
Vertical-Horizontal Indoor Units Acoustic Data A Measurement taken 3.3′ away from the unit. 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)±3. • Tested in anechoic chamber per ISO Standard 3745. Table 78: Sound Pressure Levels (dB[A]). 3.3 ft.
Vertical-Horizontal Indoor Units Refrigerant Flow Diagram A Figure 203: Multi F Vertical-Horizontal Air Handling Indoor Unit Refrigerant Flow Diagram.
Vertical-Horizontal Indoor Units Wiring Diagram A Multi F and Multi F MAX Indoor Unit Engineering Manual Figure 204: Multi F Vertical-Horizontal Air-Handling Indoor Unit Wiring Diagram. : Factory Wiring : Field Wiring : OPTION Table 81: Wiring Diagram Connections.
Vertical-Horizontal Indoor Units Wiring Diagram A Table 82: DIP Switch Settings. Dip Switch Settings SW3 GROUP OFF ON Master Slave Group control setting using wired remote controller. Description Dry contact mode setting. 1. Variable: Auto/manual mode can be chosen using the wide wired remote controller or wireless remote controller (factory setting is the manual mode). 2. Auto: For dry contact, it is always auto mode.
Vertical-Horizontal Indoor Units Factory Supplied Parts and Materials Factory Supplied Materials Multi F and Multi F MAX Indoor Unit Engineering Manual • Owner’s Manual • Installation Manual A Required Tools • • • • • Level Screwdriver Electric drill Hole core drill Flaring tool set • • • • Torque wrenches Hexagonal wrench Gas-leak detector Thermometer • Read all instructions before installing the product.
Vertical-Horizontal Indoor Units Installation and Best Layout Practices A Figure 206: General and Duct Connection Dimensions. Figure 205: Clearance Requirements.
Vertical-Horizontal Indoor Units Installation and Best Layout Practices A Vertical-Horizontal Air Handling Units can be installed in a choice of vertical (upflow) or horizontal (left side) configurations. Vertical (Upflow) Installation Figure 208: Vertical Installation / Attaching the Bottom Duct. • Unit must be positioned properly for plenum / duct installation.
Vertical-Horizontal Indoor Units Installation and Best Layout Practices A Installing the Ducts Figure 210: Securing the Ducts to the Unit. • Use more than ten (10) screws to securely attach the supply ducts to the unit. To prevent air leaks, seal around the duct opening before the duct is secure. • To prevent vibration transmission, install flexible connectors between ducts and the unit.
Vertical-Horizontal Indoor Units Installation and Best Layout Practices Drain Piping Specifications • Drain piping must have downward gradient of at least 1/50 to 1/100; to prevent reverse flow, slope should not be straight up and down. Multi F and Multi F MAX Indoor Unit Engineering Manual • Do not damage the drain port on the indoor unit when connecting the field-supplied drain piping. Figure 213: Close up of Drain Piping Connection.
Vertical-Horizontal Indoor Units Installation and Best Layout Practices A Power Wiring / Communications Cable Guidelines • • • • • • • Follow manufacturer’s circuit diagrams in the technical manuals. Confirm power source specifications. Confirm that the electrical capacity is sufficient. Starting current must be maintained ±10 percent of the rated current marked on the outdoor unit name plate. Confirm cable thickness specifications.
Vertical-Horizontal Indoor Units Installation and Best Layout Practices Controller Options Figure 221: Wired Controller Connection on the Indoor Unit Terminal Block. CN-REMO Outdoor Unit Terminal Block or Branch Distribution Unit Terminal Block (Multi F MAX Systems Only) 3 or S GND To Wired Controller GRN / YLW Wired controllers include a sensor to detect room temperature.
Application Guidelines “Equipment Selection Procedure” on page 158 “Building Ventilation Design Guide” on page 164 “Placement Considerations” on page 169
Equipment Selection Procedure A Multi F and Multi F MAX Indoor Unit Engineering Manual To choose the multi-zone system that is the most appropriate for the space, as with traditional air-conditioning systems, follow similar protocols outlined in Manual J from the Air Conditioning Contractors of America (ACCA; see www.acca.org). 1. Obtain the design conditions, and calculate the maximum cool and heat loads for the structure. 2.
Equipment Selection Procedure A Table 85: Allowable Indoor Unit to Outdoor Unit Connections. Indoor units Model Type Outdoor units LMU187HV Btu/h 9,000 12,000 18,000 9,000 12,000 9,000 12,000 18,000 9,000 12,000 18,000 24,000 36,000 12,000 18,000 24,000 36,000 2 O O O O O O O O O - ART COOL Mirror ART COOL Gallery Wall Mounted Ceiling Concealed Duct-Low Static Ceiling Concealed Duct-High Static Four-Way Ceiling Cassette Vertical-Horizontal Air Handler LMU247HV LMU369HV Maximum No.
Equipment Selection Procedure A Determine the Corrected Capacity The corrected cooling / heating capacity is different from the nominal (rated) cooling / heating capacity. The corrected capacity includes changes in unit performance after considering design temperatures, available capacity that can be allocated from the outdoor unit, pressure drop due to refrigerant line length, defrost operation in heating mode, and (if applicable) altitude.
Equipment Selection Procedure A Using the System Combination Tables Multi F system combination tables illustrate how each indoor unit receives a percentage of total outdoor unit rated capacity.
Equipment Selection Procedure A Main Piping Length (feet) 16.4 32.8 49.2 65.6 82.0 98.4 114.8 131.2 147.6 164.0 180.4 Cooling Capacity (%) 100.0 98.8 97.3 95.8 94.3 92.8 91.3 89.8 88.3 86.8 85.3 Heating Capacity (%) 100.0 99.6 99.2 98.7 98.3 97.8 97.4 96.9 96.5 96.0 95.6 Figure 226: Multi F MAX Outdoor Unit to Branch Distribution Unit Refrigerant Line Length Derate Chart. 100.0 95.
Equipment Selection Procedure A Altitude Correction Factor The impact of air density must be considered on systems installed at a significant altitude above sea level, therefore, locally accepted altitude correction factors must be applied. Defrost Correction Factor for Heating Operation The outdoor unit heating capacity may need to be adjusted for frost accumulation on air-cooled systems.
Building Ventilation Design Guide A ASHRAE Standards 62.1 and 62.2 (depending on if the building is residential or commercial), and local codes specify the minimum volume of airflow that must be provided to an occupied space. Outdoor air is required to minimize adverse health effects, and it provides acceptable indoor air quality for building occupants. Indoor units located within the zone typically require less airflow to condition the space.
Building Ventilation Design Guide A Method 2: Unconditioned Outdoor Air (Non-Ducted, Fan Assisted Ventilation) When approved by local codes, the fan assisted ventilation method uses exhaust fans to remove air from the building, and outdoor air is drawn into occupied spaces through a wall louver or gravity roof intake hood. Supply fans can also be used to push the outdoor air into the space and building positive pressure will vent the exhaust air through louvers or roof-mounted exhaust hoods.
Building Ventilation Design Guide A Method 3: Unconditioned Outdoor Air Ducted to Indoor Units Multi F and Multi F MAX Indoor Unit Engineering Manual Untreated outdoor air is channeled through a duct system that is piped to the return air duct on Multi F ducted indoor units or to the frame of Multi F four-way cassettes. Outside air may flow backward through the return air-filter grille when the indoor unit fan speed slows or stops in response to changes in the space load.
Building Ventilation Design Guide A Method 4: Coupled Dedicated Outdoor Air (CDOA) A separate, dedicated outdoor air system delivers air directly to a Multi F indoor unit or to the return air duct system. After mixing with the return air stream, ventilation air passes through the indoor unit and into the conditioned space. The pretreatment system is capable of filtering, conditioning, and dehumidifying outdoor air to room neutral conditions.
Building Ventilation Design Guide A Method 5: Decoupled Dedicated Outdoor Air System (DDOAS) LG recommends using the DDOAS method in all installations. Advantages • Does not add additional heating or cooling loads to indoor units. • May be used with the full lineup of Multi F indoor units. • Failure of outdoor unit does not impact operation of indoor unit, the resulting untreated air will be readily noticed by the occupants.
Placement Considerations A Selecting the Best Location for the Indoor Units Select a location for installing the indoor units that will meet the following conditions: • Within allowable parameters for proper connection to the outdoor unit (or Branch Distribution unit, if a Multi F MAX system). • No obstacles to air circulation around the unit; keep proper distances from ceilings, doorways, floor, walls, etc. • So that condensation drainage can be conveniently routed away.
Placement Considerations A Rooftop Installations If the outdoor unit is installed on a roof structure, be sure to level the unit. Ensure the roof structure and anchoring method are adequate for the unit location. Consult local codes regarding rooftop mounting. Multi F and Multi F MAX Indoor Unit Engineering Manual Oceanside Installation Precautions • Avoid installing the outdoor unit where it would be directly exposed to ocean winds.
Placement Considerations A Outdoor Unit Platform Requirements Figure 232: Outdoor Unit Foundation Requirements. Unit: Inch Minimum 3-15/16 Minimum 3-15/16 21-1/2 Minimum 14-9/16 21-1/2 LMU187HV and LMU247HV Outdoor Units Minimum 14-9/16 LMU369HV Outdoor Units Table 91: Outdoor Unit Foundation Specifications.
Placement Considerations A Multi F and Multi F MAX Indoor Unit Engineering Manual Tie-Downs and Lightening Protection Figure 235: Lightening Protection Diagram. Tie-Downs • The strength of the roof must be checked before installing the outdoor units. • If the installation site is prone to high winds or earthquakes, when installing on the wall or roof, securely anchor the mounting base using a field-provided tie-down configuration approved by a local professional engineer.
Placement Considerations A Clearance Requirements when Different Obstacles are Present (Unit: Inch). Obstacle on the suction side only. m u inim M 11 /16 -13 " Obstacles on the suction side and on both left and right sides. Min imu m1 1-1 3/16 " imu m2 imu 3-1 Min 9/32 6" 13/1 1m1 Application Guidelines Min " Obstacles above and on the air intake side.
Placement Considerations A Clearance Requirements when Different Obstacles are Present, continued. (Unit: Inch) Where there obstacles both suction Where there are are obstacles on on both suction discharge sides (discharge side obstacle and and discharge sides (discharge side obstacle is higher outdoor unit). is higher thanthan the the outdoor unit).
Refrigerant Piping Design & Layout Best Practices “Design Guideline Summary” on page 176 “Creating a Balanced / Quality Piping System” on page 178 “Manual Layout Procedure” on page 178 “LG Engineered Multi F MAX Y-Branch Kits” on page 179 “Refrigerant Charge” on page 180 “Selecting Field-Supplied Copper Tubing” on page 182 “Refrigerant Piping System Layout” on page 184 “Piping Insulation” on page 192 “Condensate Drain Piping” on page 193 “Cut Sheet” on page 195
Refrigerant Piping Design Design Guideline Summary A The following are examples of manual pipe size calculations. Designers are highly encouraged to use LATS for Multi F systems. Device Connection Limitations • The minimum number of connected and operating indoor units to Multi F / Multi F MAX systems is two, taking into consideration of the minimum combination ratio.
Refrigerant Piping Design A Design Guideline Summary The following are examples of manual pipe size calculations. Designers are highly encouraged to use LATS for Multi F systems. Multi F MAX System with One Branch Distribution Unit Example: LMU540HV outdoor unit with four (4) indoor units, and one (1) branch distribution unit connected. IDU BDU A B h1 ≤ 98.4 feet h2 ≤ 49.2 feet IDU B IDU B h3 ≤ 32.8 feet Refrigerant Piping Design and Best Practices ODU: Outdoor Unit. IDU: Indoor Unit.
Refrigerant Piping Design Creating a Balanced System / Manual Layout Procedure A Creating a Balanced / Quality Piping System Multi F and Multi F MAX Indoor Unit Engineering Manual Unlike designing duct-work or chilled and hot water pipe systems where balancing dampers, ball valves, orifices, circuit setters, or other flow control devices can be installed to modify or balance the flow of cooling medium, these cannot be used in a Multi F system.
Refrigerant Piping Design LG Engineered Multi F MAX Y-Branch Kit A Multi F MAX Y-Branch Kit PMBL5620 The LG supplied Y-Branch Kit PMBL5620 MUST be used when two branch distribution units are connected on one Multi F MAX system. Field-supplied fittings are not permitted. Each Y-Branch kit comes with two (2) Y-branches (one for the liquid line and one for the vapor line) and insulation covers. Y-branches must be properly installed following instructions in the applicable LG manual.
Refrigerant Piping Design Refrigerant Charge A Multi F and Multi F MAX Indoor Unit Engineering Manual LG Multi F and Multi F MAX outdoor units ship from the factory with a charge of R410A refrigerant. A trim charge may need to be added to take into account additional piping length. To determine the additional refrigerant that is needed, apply the formulas below, and record the results.
Refrigerant Piping Design Refrigerant Charge A Multi F MAX Systems Additional charge (lbs.) = (Total Main Piping Length [A] - Chargeless Pipe Length of Main Pipe [A]) x a + (Installed Length of Branch [B1] – Chargeless Pipe Length [B]) x b + (Installed Length of Branch [B2] – Chargeless Pipe Length [B]) x b + (Installed Length of Branch [B3] – Chargeless Pipe Length [B]) x b ... - CF (Correction Factor) x 3.53 Table 101: Multi F MAX Outdoor Unit Piping Specifications.
Refrigerant Piping Design Selecting Field-Supplied Copper Tubing Multi F and Multi F MAX Indoor Unit Engineering Manual Copper is the only approved refrigerant pipe material for use with LG Multi F air conditioning products, and LG recommends hard-drawn rigid type “K” or “L”, or annealed-tempered, copper pipe. • Drawn temper (rigid) ACR copper tubing is available in sizes 3/8 through 2-1/8 inches (ASTM B 280, clean, dry, and capped).
Installation & Layout Best Practices Selecting Field-Supplied Copper Tubing A Table 104: Linear Thermal Expansion of Copper Tubing in Inches. 1 40° 45° 50° 55° 60° 65° 70° Fluid Temperature °F 75° 80° 85° 90° 95° 100° 105° 110° 115° 120° 125° 130° 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40 0.48 0.56 0.64 0.72 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.60 0.70 0.80 0.90 0.06 0.12 0.18 0.24 0.30 0.36 0.42 0.48 0.54 0.60 0.72 0.84 0.96 1.08 0.06 0.13 0.20 0.26 0.33 0.39 0.46 0.
Installation & Layout Best Practices Refrigerant Piping System Layout A Multi F and Multi F MAX Indoor Unit Engineering Manual Field-Provided Isolation Ball Valves LG recommends installing field-supplied ball valves with Schrader ports at each indoor unit. Full-port isolation ball valves with Schrader ports (positioned between valve and indoor unit) rated for use with R410A refrigerant should be used on both the liquid and vapor lines.
Installation & Layout Best Practices Refrigerant Piping System Layout A Inserts and Pipe Supports Figure 245: Installing an Insert Into a Concrete Beam. Inserts An insert can be installed into a floor or beam before the concrete sets so that fittings such as ducts, pipes, or suspension bolts can be added at a later time. Decide where the inserts should be placed before support installation.
Installation & Layout Best Practices Refrigerant Piping System Layout A Examples of Supports Figure 250: U-Bolt Support with Insulation. Figure 251: O-Ring Support with Insulation. Figure 252: Saddle-Type Support. Bolt Insulation Support at Intervals Between 5 and 6-3/4 Feet Multi F and Multi F MAX Indoor Unit Engineering Manual Bolt 1.5t Plate PVC PVC Do not compress the insulation with the saddle-type support.
Installation & Layout Best Practices Refrigerant Piping System Layout A Pipe Sleeves at Penetrations LG requires that all pipe penetrations through walls, floors, and pipes buried underground be routed through a properly insulated sleeve that is sufficiently sized to provide free movement of the pipe and does not compress the insulation. Underground refrigerant pipe shall be routed inside a protective sleeve to prevent insulation deterioration.
Installation & Layout Best Practices Refrigerant Piping System Layout A Multi F Outdoor Unit to Indoor Unit Piping Connections Avoid Pipe Damage Multi F and Multi F MAX Indoor Unit Engineering Manual • When routing field-provided piping, avoid damaging the outdoor unit from excessive vibration. • Correctly route the piping so it does not make contact with mounting bolts. Allow room for field installation.
Installation & Layout Best Practices Refrigerant Piping System Layout A Multi F MAX Outdoor Unit System Piping Connections Avoid Pipe Damage • When routing field-provided piping, avoid damaging the outdoor unit from excessive vibration. • Correctly route the piping so it does not make contact with mounting bolts. Allow room for field installation. • Properly insulate the liquid and gas lines separately up to the point of connection at the unit frame.
Installation & Layout Best Practices Refrigerant Piping System Layout A Multi F MAX Outdoor Unit System Piping Connections, continued. 1. Align the center of the piping sections and tighten the flare nut by hand. 2. Tighten the flare nut with a torque wrench, using the arrows on the wrench as a guide, until a click is heard. 3. Wrap insulation around the connection. Figure 265: Possible Branch Distribution Unit to Indoor Unit Connections. Multi F and Multi F MAX Indoor Unit Engineering Manual 1. 3/8 in.
Installation & Layout Best Practices Refrigerant Piping System Layout A Brazing Practices Keep the piping system free of contaminants and debris such copper burrs, slag, or carbon dust during installation. 1. All joints are brazed in the field. Multi F refrigeration system components contain very small capillary tubes, small orifices, electronic expansion valves, oil separators, and heat exchangers that can easily become blocked. • Store pipe stock in a dry place; keep stored pipe capped and clean.
Installation & Layout Best Practices Piping Insulation A Multi F and Multi F MAX Indoor Unit Engineering Manual Refrigerant Piping System Insulation All refrigerant piping including Y-branch connections, field-provided isolation ball valves, service valves, and elbows shall be completely insulated using closed cell pipe insulation. To prevent heat loss/heat gain through the refrigerant piping, all refrigerant piping including liquid lines and vapor lines shall be insulated separately.
Installation & Layout Best Practices Condensate Drain Piping A Condensate Drain Piping Outdoor Units Outdoor unit requires condensate drain piping. Condensate drain pipe is constructed with materials approved by local code. See pages 169 to 174 for information in reference to outdoor unit placement and condensate drainage.
Installation & Layout Best Practices Condensate Drain Piping A Multi F and Multi F MAX Indoor Unit Engineering Manual Common Indoor Unit Drainage System It is usual work practice to connect individual indoor unit drain pipes to one common indoor unit drainage system. The diameter of the common vertical drain pipe should be as large as necessary. (For systems with <80,000 Btu/h total capacity of all connected indoor units, the standard size for the common vertical drain pipe is 0.98 ID, in. and 1.
Cut Sheet Y-Branch Kit A • LG Y-Branch Kit PMBL5620 is required when installing two branch distribution units in parallel on one LG Multi F MAX system. • The kit must be properly installed following instructions in the applicable LG manual. Field-supplied branch fittings are not permitted. • Kit components must be kept free of debris and be dry before installation. • All Y-Branch Kits include a clam shell, peel-and-stick insulation jacket. Table 117: Fitting Properties.
Multi F and Multi F MAX Indoor Unit Engineering Manual A 196 | Design & Practices 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.
Wiring Connections “General Information” on page 198 “Power Wiring (208-230V) and Communications Cable Details” on page 201 “Indoor Unit Group Control” on page 206
Wiring Connections Multi F and Multi F MAX Indoor Unit Engineering Manual General Information A • Only qualified technicians—in accordance with federal, state, and local codes, and manufacturer product diagrams and requirements— should install the power wiring and communication cables. • Use only copper wiring that is stranded, shielded with the wires separately insulated. • Do not use a multi-conductor cable with more than five (5) wires in one (1) core.
Wiring Connections General Information A Connecting the Power Wiring / Communications Cable Best practice dictates using ring or spade terminals to terminate power wiring at the power terminal block. 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.) • When terminating wires of the same thickness, follow the instructions demonstrated in the figures below.
Wiring Connections General Information A Figure 284: Multi F System General Power / Communications System Schematic. Indoor Units Multi F and Multi F MAX Indoor Unit Engineering Manual Power Supply Circuit Breaker Ground Wiring Outdoor Unit Figure 285: Multi F MAX System General Power / Communications System Schematic. Indoor Unit BD Unit Power Supply Circuit Breaker BD Unit Ground Wiring Outdoor Unit • Secure the separate wires in the control box panel using zip ties.
Wiring Connections A Power Wiring (208-230V) and Communications Cable Details • Find the outdoor unit terminal block by unscrewing the control access panel. Figure 286: Example of Power Wiring and Communications Cable Terminations. Control Access Panel • Side panel of the outdoor unit has knockout holes for the conduits. After install is complete, seal up any gaps between the panel and the conduits. • Clamp is included near the terminal block to help protect the connections from strain on the cables.
Wiring Connections Power Wiring (208-230V) and Communications Cable Details A Figure 287: Multi F LMU187HV System Power Wiring and Communications Cable.
Wiring Connections Power Wiring (208-230V) and Communications Cable Details A Figure 288: Multi F LMU247HV System Power Wiring and Communications Cable.
Wiring Connections Power Wiring (208-230V) and Communications Cable Details A Figure 289: Multi F LMU369HV System Power Wiring and Communications Cable.
Wiring Connections Power Wiring (208-230V) and Communications Cable Details A Figure 290: Multi F MAX LMU540HV System Power Wiring and Communications Cable.
Wiring Connections Indoor Unit Group Control A Communication Cables Between Multiple Indoor Units Operating as a Group (Group Control) Multi F and Multi F MAX Indoor Unit Engineering Manual 1. If any indoor units were specified to operate in unison, use one (or multiple) three-core Group Control Kit (sold separately) containing extension and Y-splitter cables. One (1) group control cable kit for each indoor unit in the group except for the last indoor unit. 2.
Acronyms A Table 121: Table of Acronyms.
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