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MULTI MULTI WITH HEAT PUMP OUTDOOR UNIT ENGINEERING MANUAL Up to Six Zones Multi-Zone Heat Pump Systems Multi F MAX 1.5 to 3.5 Tons Dual-, Tri-, and Quad-Zone Multi F...
TABLE OF CONTENTS Unit Nomenclature .......................................... 4 LG Air Conditioner Technical Solution (LATS) ................................. 5-6 Manual Equipment Selection Procedures ................................7-12 Multi F with LGRED Outdoor Unit Product Data ..............................13-26 ......................................14 General Data ..........................................15 Electrical Data ..........................................16 Functions, Controls, Options, and Accessories ................................
MULTI UNIT NOMENCLATURE WITH MULTI Multi-Zone Systems — Indoor Units and Outdoor Units 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...
LG offers, free of charge, LG Air Conditioner Technical Solution (LATS) software—a total design solution for LG air conditioning systems. To reduce the risk of designing an improper applied system or one that will not operate correctly, LG prefers that LATS software be used all projects. Formats LATS is available to LG customers in three user interfaces: LATS HVAC, LATS CAD2, and LATS Revit.
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LATS can generate an Excel GERP report that can imported into the LG SOPS pricing and ordering system.
MULTI MANUAL EQUIPMENT WITH MULTI SELECTION PROCEDURE To use the manual equipment selection procedure in choosing 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).
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In some designs, oversized indoor units may be unavoidable in the case where the smallest size indoor unit available from LG is larger than what is necessary to satisfy the zone load. This scenario may also occur when an indoor unit selection one size down from the selected unit is slightly short of fulfilling the design load requirements, and the designer must choose the next largest size unit.
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MULTI MANUAL EQUIPMENT WITH MULTI SELECTION PROCEDURE Table 2: Rated Outdoor Unit Capacity. Outdoor Units LMU180HHV LMU240HHV LMU300HHV LMU360HHV LMU420HHV Cooling 18,000 24,000 28,400 36,000 42,000 Rated Capacity (Btu/h)* Heating 22,000 26,000 28,600 41,000 45,000 Minimum No. of Connectible IDUs Connectible Indoor Units Maximum No.
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MULTI MANUAL EQUIPMENT WITH MULTI SELECTION PROCEDURE Using the System Combination Tables Multi F with LGRED system combination tables illustrate how each indoor unit receives a percentage of total outdoor unit rated capacity. Allocation is based on: • Combinations of Non-Ducted Indoor Units •...
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MULTI MANUAL EQUIPMENT WITH MULTI SELECTION PROCEDURE Table 4: Multi F MAX with LGRED Outdoor Unit to Branch Distribution Unit Refrigerant Line Length Derates. 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...
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If further system design assistance is needed, or you have a unique ities (applies in 99% of applications – consider total load when application you would like to discuss, contact your LG sales repre- latent load is greater than 30%).
MULTI F WITH LGRED PRODUCT DATA Mechanical Specifications on page 14 General Data on page 15 Electrical Data on page 16 Functions, Controls, Options, and Accessories on page 17 Dimensions on page 18 Wiring Diagrams on page 19-21 Refrigerant Flow Diagrams on page 22-24 Acoustic Data on page 25 Operation Range on page 26...
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ISO 9001 and ISO 14001, set by the International Organization for lation range of 20Hz to 100Hz Standardization (ISO). The LG Multi F with LGRED multi zone heat with control in 1Hz increments. pump system components comply with Underwriters Laboratories The compressor is protected (UL) 1995 Heating and Cooling Equipment Standard for Safety.
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MULTI F WITH LGRED MULTI WITH General Data Table 7: Model Number LMU180HHV LMU240HHV LMU300HHV Capacity Nominal 18,000 24,000 30,000 Cooling (Btu/h) (Min.~Rated~ Max.) 8,400 ~ 18,000 ~ 19,980 8,400 ~ 24,000 ~ 30,000 8,400 ~ 28,400 ~ 34,080 Cooling Power Input (kW) (Min.~Rated~ Max.) 0.88 ~ 1.33 ~ 1.87 0.94 ~ 1.78 ~ 2.49 0.95 ~ 2.27 ~ 3.18...
MULTI F WITH LGRED MULTI WITH General Data / Electrical Data General Data, continued. Table 8: Rated Cooling Rated Heating Low Heating System Combined With SEER HSPF Capacity (Btu/h) (95°F) Capacity (Btu/h) (47°F) Capacity (Btu/h) (17°F) Non-Ducted Indoor Units 18,000 13.5 21.0 22,000...
MULTI F WITH LGRED MULTI WITH Refrigerant Flow Diagram Figure 9: LMU180HHV Refrigerant Flow Diagram. Outdoor Unit Inlet Air Temperature Thermistor Condensing Temperature Flare Connection Thermistor Electronic Strainer Expansion Valve Condenser Outlet ROOM A Temperature Main SVC V/V Thermistor ROOM B Pressure Sensor Main SVC V/V...
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MULTI F WITH LGRED MULTI WITH Refrigerant Flow Diagram Figure 10: LMU240HHV Refrigerant Flow Diagram. Outdoor Unit Inlet Air Temperature Thermistor Condensing Temperature Flare Connection Thermistor Electronic Strainer Expansion Valve Condenser Outlet ROOM A Temperature Main SVC V/V Thermistor ROOM B ROOM C Pressure Sensor...
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MULTI F WITH LGRED MULTI WITH Refrigerant Flow Diagram Figure 11: LMU300HHV Refrigerant Flow Diagram. Outdoor Unit Condenser Out Inlet Air Temperature Temperature Flare Connection Thermistor Thermistor Electronic Condensing Expansion Temperature Valve Thermistor ROOM A Strainer ROOM B Main SVC V/V ROOM C ROOM D Pressure...
MULTI F WITH LGRED MULTI WITH Acoustic Data Figure 12: Acoustic Measurement Location. • • Measurements taken with no attenuation and units operating at full Microphone load normal operating condition. • Sound level will vary depending on a range of factors such as 3.3 feet construction (acoustic absorption coefficient) of particular area in which the equipment is installed.
MULTI F MAX WITH LGRED PRODUCT DATA Mechanical Specifications on page 28 General Data on page 29 Electrical Data on page 30 Functions, Controls, Options, and Accessories on page 31 Dimensions on page 32 Wiring Diagram on page 33 Refrigerant Flow Diagram on page 34 Acoustic Data on page 35 Operation Range on page 36...
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20Hz to 100Hz with The outdoor unit is internally assembled, wired, and piped from the factory; all LG components are manufactured in a facility registered control in 1Hz increments. The compressor is protected with...
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MULTI F MAX WITH LGRED MULTI WITH General Data Table 17: Model Number LMU360HHV LMU420HHV Capacity Nominal 36,000 42,000 Cooling (Btu/h) (Min.~Rated~ Max.) 11,700~36,000~46,733 11,700~42,000~53,897 Cooling Power Input (kW) (Min.~Rated~ Max.) 0.72 ~ 2.40 ~ 3.75 0.72 ~ 3.00 ~ 4.34 Cooling Running Current (A) (Min.~Rated~ Max.) 3.9 ~ 13.0 ~ 20.4 3.9 ~ 16.3 ~ 23.6...
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MULTI F MAX WITH LGRED MULTI WITH General Data / Electrical Data General Data Table 18: Rated Cooling Rated Heating Low Heating System Combined With SEER HSPF Capacity (Btu/h) (95°F) Capacity (Btu/h) (47°F) Capacity (Btu/h) (17°F) Non-Ducted 36,000 15.0 21.0 41,000 11.5 28,000...
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Dry Contact Low Ambient Wind Bafflle Kit ZLABGP04A x 2 (Logical Operation) ZLABGP04A x 2(Logical Operation) Factory-Supplied Drain Heater Compatibility w / prior generation of Multi F Computer LG Monitoring View (LGMV) PRCTIL0 PRCTIL0 Mobile LGMV for PLGMVW100 PLGMVW100 Android Smartphones / Tablets...
MULTI F MAX WITH LGRED MULTI WITH Refrigerant Flow Diagram Figure 18: LMU360HHV and LMU420HHV Refrigerant Flow Diagram. Outdoor Unit Inlet Air Condenser Outlet Temperature Temperature Thermistor Thermistor Condensing Ø3/8 Temperature Flare Connection Middle Thermistor 2 Fans Strainer Strainer Electronic Expansion Valve Pressure Sensor...
MULTI F MAX WITH LGRED MULTI WITH Acoustic Data • Figure 19: Acoustic 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.
MULTI F MAX WITH LGRED BRANCH DISTRIBUTION (BD) UNIT DATA Mechanical Specifications on page 38 General Data on page 39 Dimensions on page 40 Wiring Diagram on page 41 Refrigerant Flow Diagram on page 42 Y-Branch Accessory on page 43 Branch Distribution Unit Orientation on page 44...
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Figure 22: PMBD3620 Two-Port Branch Distribution Unit. General Branch distribution units are designed for use with LG Multi F MAX with LGRED (LMU360HHV and LMU420HHV) outdoor units, and are internally piped, wired, assembled and run-tested at the factory. The branch distribution unit is used as...
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MULTI F MAX WITH LGRED BD UNIT MULTI WITH General Data Table 24: Multi F MAX with LGRED Branch Distribution Unit General Data. Model Number PMBD3620 PMBD3630 PMBD3640 PMBD3641 No. of Connectable Indoor Units Ports A, B, C: 24,000; Max. Nominal Capacity / Port (Btu/h) 24,000 24,000 24,000...
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MULTI F MAX WITH LGRED BD UNIT MULTI WITH Dimensions Figure 25: PMBD3620, PMBD3630, PMBD3640, and PMBD3641 External Dimensions. A-C (and PMBD3640 D) Connections: Unit: Inch Liquid Pipe Ø1/4 Gas Pipe Ø3/8 PMBD3641 D Connections: Ø3/4 Liquid Pipe Ø1/4 Gas Pipe Ø1/2 Indoor Unit Piping Direction Ø3/8...
MULTI F MAX WITH LGRED BD UNIT MULTI WITH Wiring Diagram Figure 26: PMBD3620, PMBD3630, PMBD3640, PMBD3641 Wiring Diagram. Model Dependant Model Dependant Model Dependant Troubleshooting Model Dependant PMBD3620 BD Unit supplied with "A, B". PMBD3630 BD Unit supplied with "A, B, C". PMBD3640 and PMBD3641 BD Units supplied with "A, B, C, D".
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MULTI F MAX WITH LGRED BD UNIT MULTI WITH Refrigerant Flow Diagram Figure 27: PMBD3620, PMBD3630, PMBD3640, PMBD3641 Refrigerant Flow Diagram. Main gas piping (Ø 3/4) Outdoor Unit *PMBD3641 Main liquid D Gas: Ø1/2 piping (Ø 3/8) D Gas (Ø3/8) EEV-A C Gas (Ø3/8) B Gas (Ø3/8)
WITH Y-Branch Accessory Multi F MAX with LGRED Y-Branch Kit PMBL5620 The LG-supplied Y-Branch kit PMBL5620 MUST be used when in- Figure 28: stalling two (2) branch distribution units in parallel on one (1) Multi F MAX with LGRED system.
MULTI F MAX WITH LGRED BD UNIT MULTI WITH Branch Distribution Unit Orientation Multi F MAX with LGRED branch distribution units can be installed in a multitude of options to fit This material is for informational various building configurations and job or application requirements. Multi F MAX with LGRED branch or educational purposes only.
ELECTRICAL CONNECTIONS General Information on page 46 Wiring Specifications on page 47 Systems for Multi F / Multi F MAX with LGRED on page 49 Indoor Units / Controllers on page 53...
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MULTI ELECTRICAL CONNECTIONS WITH MULTI General Information • All power (line voltage) wiring and communication cable installation must be performed by trained service providers working in accordance with all local, state, and National Electrical Code (NEC) / UL federal regulations related to electrical equipment and wiring, and following the manufacturer product diagrams, requirements, and instructions in this manual.
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MULTI ELECTRICAL CONNECTIONS WITH MULTI Communication / Connection (Power) Cable Specifications • Multi F with LGRED Systems: Figure 37: Typical Multi F / Multi F MAX with • Communication / connection (power) cable from the outdoor unit to the indoor unit for LGRED Outdoor and Indoor / Branch Distribution lengths up to 130 feet must use a minimum of 14 AWG, four (4) conductor, stranded, Unit Wiring and Communications Cable Diagram...
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MULTI ELECTRICAL CONNECTIONS WITH MULTI Figure 38: Typical Multi F with LGRED System General Power / Commu- Figure 39: Typical Multi F MAX with LGRED System General Power nications System Schematic When Wiring is Less Than 130 Feet. / Communications System Schematic When Wiring is Less Than 130 Feet.
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MULTI ELECTRICAL CONNECTIONS WITH MULTI Systems for Multi F with LGRED Figure 42: Multi F with LGRED LMU180HHV System Power Wiring and Communications Cable Connections. Power Supply Main Switch Outdoor Unit Outdoor Unit Terminal Block Circuit Breaker 1(L1) 2(L2) 3(A) 1(L1) 2(L2) 3(B) Fuse...
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MULTI ELECTRICAL CONNECTIONS WITH MULTI Systems for Multi F with LGRED Figure 43: Multi F with LGRED LMU240HHV System Power Wiring and Communications Cable Connections. L1 L2 Power Supply Main Switch Outdoor Unit Outdoor Unit Terminal Block Circuit Breaker 1(L1) 2(L2) 3(A) 1(L1) 2(L2) 3(B)
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MULTI ELECTRICAL CONNECTIONS WITH MULTI Systems for Multi F with LGRED Figure 44: Multi F with LGRED LMU300HHV System Power Wiring and Communications Cable Connections. L1 L2 Power Supply Main Switch Outdoor Unit Outdoor Unit Terminal Block Circuit Breaker 1(L1) 2(L2) 3(A) 1(L1) 2(L2) 3(B)
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MULTI ELECTRICAL CONNECTIONS WITH MULTI Systems for Multi F MAX with LGRED Figure 45: Multi F MAX with LGRED LMU360HHV and LMU420HHV System Power Wiring and Communications Cable Connections. Power Supply Main Switch Outdoor Unit Outdoor Unit Terminal Block Circuit Breaker 1(L1) 2(L2) 3(A) 3(B)
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• If using the LG Controller / Extension cable and the length needs to be extended, the LG Extension Kit (sold separately) must be used. A maximum of four (4) kits (up to 165 feet) can be used.
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NEVER splice, cut, or extend cable length; always include enough cable to cover Supplied distance between all components. LG Supplied Group Control Kit (PZCWRCG3) For indoor units with CN-REMO connections: Use one (or multiple) Group Control Kit(s) (sold separately) containing extension and Y-splitter cables.
PIPING LIMITATIONS AND PLACEMENT CONSIDERATIONS Piping Limitations on page 56 Selecting the Best Location for the Outdoor Unit on page 58 Outdoor Unit Clearance Requirements on page 60 Installing Outdoor Units Indoors on page 63 Selecting the Best Location for the Indoor Units / Branch Distribution Units on page 66...
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MULTI PIPING LIMITATIONS WITH MULTI Following pages present Multi F / MAX with LGRED piping limitations and are for illustrative purposes only. Designers are highly encouraged to use LATS when designing Multi F / MAX with LGRED systems. Device Connection Limitations •...
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MULTI PIPING LIMITATIONS WITH MULTI Following pages present Multi F / MAX with LGRED piping limitations and are for illustrative purposes only. Designers are highly encouraged to use LATS when designing Multi F / MAX with LGRED systems. Example of a Multi F MAX with LGRED System with One Branch Distribution Unit Example: LMU360HHV outdoor unit with four (4) indoor units and one (1) branch...
MULTI PLACEMENT CONSIDERATIONS WITH MULTI Selecting the Best Location for the Outdoor Unit Selecting the Best Location for the Outdoor Unit DANGER • 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.
MULTI PLACEMENT CONSIDERATIONS WITH MULTI Selecting the Best Location for the Outdoor Unit Planning for Snow and Ice, continued. When deciding on a location to place the outdoor unit, be sure to choose an area where run-off from defrost will not accumulate and freeze on side- walks or driveways, which may create unsafe conditions.
MULTI PLACEMENT CONSIDERATIONS WITH MULTI Outdoor Unit Clearance Requirements Minimum Allowable Clearance and Service Access Requirements Proper clearance for the outdoor unit coil is critical for proper operation. When installing the outdoor unit, consider service, inlet and outlet, and minimum allowable space requirements as illustrated in the diagrams on the following pages. •...
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MULTI PLACEMENT CONSIDERATIONS WITH MULTI Outdoor Unit Clearance Requirements Multi F MAX with LGRED Outdoor Unit (36,000 and 42,000 Btu/h Capacity) Service Access and Allowable Clearances When installing the outdoor unit, consider service, inlet, and outlet, and minimum allowable space requirements as illustrated in the following diagrams.
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MULTI PLACEMENT CONSIDERATIONS WITH MULTI Outdoor Unit Clearance Requirements Clearance Requirements when Different Obstacles are Present, continued. (Unit: Inch) Where there are obstacles on both suction Obstacles above and on Where there are obstacles on both suction and discharge sides (discharge side obstacle the air discharge side.
Installing Outdoor Units Indoors LG Multi F / Multi F MAX with LGRED 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: •...
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MULTI PLACEMENT CONSIDERATIONS WITH MULTI Installing Outdoor Units Indoors Provide a means to drain the condensate generated during heating mode and defrost cycle in addition to rainwater that infiltrates the inlet louver enclosed area. • Install a field-provided drain pan under the outdoor units and provide a path to a nearby floor drain. •...
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MULTI PLACEMENT CONSIDERATIONS WITH MULTI Installing Outdoor Units Indoors Open Rate by Louver Radian Figure 51: Open Rate by Louver Radian Formula. ho = h * COS Total Area (A) = H * W Number of Open Spaces (N) = (Number of Louvers - 1) Effective Area (Af) = ho * W * N Louver Open Rate (n) = Af / A Af = A * n...
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• Within allowable parameters for proper connection to the Multi F MAX with LGRED outdoor unit and indoor unit(s); refrigerant piping and wire lengths must not exceed amounts specified by LG Electronics, U.S.A., Inc. • Condensate drain piping is not required.
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MULTI PLACEMENT CONSIDERATIONS WITH MULTI Selecting the Best Location for the Indoor Units / Branch Distribution Units Figure 53: Branch Distribution Unit Key Components. Service Direction 1-3/16 1-31/32 Piping to Indoor Units Service Direction Branch Distribution Unit Orientation Multi F MAX with LGRED branch distribution units can be installed in a multitude of options to fit various building configurations and job or application requirements.
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20001747 ISO 9001: 2008 LG ELECTRONICS INC. EM_MultiF_MAX_LGRED_ODU_06_21 Supersedes: EM_MultiF_MAX_LGRED_ODU_11_2020 EM_MultiF_MAX_LGRED_ODU_06_2020 EM_MultiF_MAX_LGRED_ODU_04_2020 LG Electronics, U.S.A., Inc. EM_MultiF_MAX_LGRED_ODU_07_18 Air Conditioning Technologies EM_MultiF_MAX_LGRED_ODU_01_18 4300 North Point Parkway EM_MultiF_MAX_LGRED_ODU_11_17 Alpharetta, Georgia 30022 EM_MultiF_MAX_LGRED_ODU_10_17 www.lghvac.com...
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