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Refrigerant Flow Diagram

Figure 195: Multi F Four-Way Ceiling-Cassette Indoor Unit Refrigerant Flow Diagram.

Table 77: Multi F Four-Way Ceiling-Cassette Indoor Unit Refrigerant Pipe Connection Port Diameters.

Model No.

Vapor (inch)

Liquid (inch)

LMCN077HV

 Ø3/8

Ø1/4

LMCN097HV
LMCN125HV
LMCN185HV

Ø1/2

 Ø1/4

Table 78: Multi F Four-Way Ceiling-Cassette Indoor Unit Thermistor Details.

Description (Based on Cooling Mode)

PCB Connector

Indoor Air Temperature Thermistor

CN-ROOM

Evaporator Inlet Temperature Thermistor

CN-PIPE/IN

Evaporator Outlet Temperature Thermistor

CN-PIPE/OUT

Heat exchanger

Gas pipe connection port
(flare connection)

Liquid pipe connection port
(flare connection)

Turbo fan

Coolin

g

Heating

M 

Thermistor for Evaporator

 

Inlet Temperature

Thermistor for Indoor

 

Air Temperature 

Thermistor for Evaporator 

Outlet Temperature 

FOUR-WAY CEILING-CASSETTE INDOOR UNITS

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.

142   |  CEILING-CASSETTE

Multi F and Multi F MAX Indoor Unit Engineering Manual

MULTI 

F

MAX

MULTI 

F

Summary of Contents for MULTI F MAX

Page 1: ...ING MANUAL Indoor Units for Multi Zone Heat Pump Systems 7 000 to 36 000 Btu h MULTI FMAX MULTI F Art CoolTM Mirror Wall Mounted Art CoolTM Gallery Wall Mounted Ceiling Concealed Duct High Static Four Way Ceiling Cassette ...

Page 2: ...trations data information and other materials are the property of LG Electronics U S A Inc TABLE OF SYMBOLS DANGER This symbol indicates an imminently hazardous situation which if not avoided will result in death or serious injury WARNING This symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION This symbol indicates a potentially ...

Page 3: ...n and Best Layout Practices 102 Duct High Static Indoor Units 112 Mechanical Specifications and Features 112 General Data Specifications 113 Dimensions 114 Cooling Capacity Table 115 Heating Capacity Table 116 External Static Pressure Acoustic Data 117 Refrigerant Flow Diagrams 118 Wiring Diagrams 119 Factory Supplied Parts and Materials Installation 120 Installation and Best Layout Practices 121 ...

Page 4: ...r way ceiling cassettes ceiling concealed duct high and low static and vertical horizontal air handling models Multi F MAX systems released in 2012 can oper ate up to eight indoor units through two three or four port branch distribution units Adaptable and Flexible Multi F outdoor units can be adapted to a wide range of building ap plications and sizes such as schools hotels hospitals offices and ...

Page 5: ...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 ...

Page 6: ... 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 L LG 07 7 000 09 9 000 12 12 000 15 15 000 18 18 000 24 24 000 36 36 000 54 54 000 L Type M Multi Zone Branch Distribution Units M BD 36 BD Branch Distribution Unit P Part Accessory P Type M Multi Zone Family...

Page 7: ...lb DB and 75ºF wet bulb WB 3 Minimum number of connectable indoor units is two 2 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 Liquid Vapor Multi F Dual Zone LMU18CHV 34 1 4 x 25 25 32 x 12 19 32 18 000 99 2 2 1 4 x 2 Each 3 8 x 2 Each Multi F Tri Zone LMU24CHV 34 1 4 x 25 25 32...

Page 8: ...314 258 198 Standard Wall Mounted LMN077HVT 35 1 4 x 11 3 8 x 8 9 32 7 000 198 177 162 23 1 4 3 8 LSN090HSV4 34 7 8 x 11 1 4 x 8 1 4 9 000 247 230 212 20 1 4 3 8 LSN120HSV4 34 7 8 x 11 1 4 x 8 1 4 12 000 335 318 300 20 1 4 3 8 LMN157HVT 35 1 4 x 11 3 8 x 8 9 32 14 300 371 318 247 23 1 4 3 8 LSN180HSV4 40 9 16 x 12 13 16 x 9 13 16 18 000 572 501 434 31 3 8 5 8 LMN247HVT 40 9 16 x 12 25 32 x 9 27 32...

Page 9: ...fan speed and temperature setpoint Also provides subfunction control Included with Art Cool Mirror3 and Gallery4 Wall Mounted Standard HVT3 Wall Mounted Standard HSV5 Wall Mounted and Four Way Cassette6 indoor units optional accessory for Duct and Vertical Horizontal AHU with use of wired controller Wall Mounted Remote Temperature Sensor PQRSTA0 Ivory 50 Allows remote temperature measurement for f...

Page 10: ...atus Error Status Enables the indoor unit to be controlled and monitored by a third party thermostat or controller PI 485 V net Control Integration Board PMNFP14A1 Outdoor Unit Control integration to LG V net controls AC Smart Premium ACP BACnet LonWorks etc Power Distribution Indicator PDI Premium PQNUD1S41 Comm BUS Energy Consumption Monitoring 8 0 Monitors total outdoor unit power consumption f...

Page 11: ...emand control PDI integration andAC Manager Plus integration advanced functionality in addition to basic unit control and monitoring Advanced Control Platform ACP Premium PQCPC22A1 256 16 64 128 with PDI Premium 10 4 24 VAC Before specifying or placing an order refer to the V Net Network Solutions Engineering Product Data Book and review the detailed technical data provided to fully understand the...

Page 12: ...speed Jet cool Swirl wind Filter Washable anti fungal1 Plasma2 o3 3M HAF2 Ventilation 4 Operation Drain pump E S P control Electric heater o High ceiling Hot Start Self diagnostics Soft Dry dehumidification Auto operation Auto clean coil dry Auto restart Child lock o o o o o o o Forced operation Group control Requires the use of one Group control Cable Kit PZCWRCG3 for every additional indoor unit...

Page 13: ...or unit from one 1 to four 4 indoor units maximum 24 000 Btu h for ports A B C maximum 36 000 Btu h for D port Y branch Kit PMBL5620 Y branch Kit for Multi F MAX outdoor unit to connect up to two 2 branch distribution units Model No Description For Four Way Ceiling Cassette Indoor Units PT UQC Ceiling Grille PTPKQ0 Plasma Kit PTVK430 Ventilation Kit For Vertical Horizontal Air Handing Units ANEH05...

Page 14: ...on 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 14 INTRODUCTION Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 15: ...ble 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 UNIT DATA ...

Page 16: ... Filter Return air inlet has a factory supplied primary removable washable filter The unit is also equipped with a secondary plasma filter Filters are accessed from the front of the unit without the use of tools Airflow Guide Vanes A motorized guide vane is factory installed and allows the ability to control the direction of airflow from side to side A motorized louver provides an automatic change...

Page 17: ...corresponding refrigerant piping length in accordance with standard length of each outdoor unit and a 0 ft level difference between outdoor and indoor units All capacities are net with a combination ratio between 95 105 Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb DB and 67ºF wet bulb WB and outdoor ambient conditions of 95ºF dry bulb DB and 75ºF wet ...

Page 18: ...e Return Air Inlet Supply Air Vane 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 18 ART COOL MIRROR Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 19: ...urn Air Inlet Return Air Inlet Supply Air Vane ART COOL MIRROR 19 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 MULTI FMAX MULTI F ...

Page 20: ... 18 8 97 13 71 9 16 14 64 9 24 15 37 9 41 40 11 72 8 84 12 45 9 34 13 17 9 04 13 70 9 23 14 63 9 31 15 36 9 48 45 11 71 8 90 12 44 9 41 13 16 9 11 13 69 9 30 14 62 9 38 15 35 9 55 50 11 70 8 97 12 43 9 47 13 15 9 17 13 68 9 37 14 61 9 45 15 33 9 62 55 11 69 9 03 12 42 9 54 13 14 9 24 13 67 9 44 14 60 9 52 15 32 9 70 60 11 68 9 10 12 41 9 61 13 13 9 31 13 66 9 50 14 59 9 58 15 31 9 77 65 11 67 9 17...

Page 21: ...19 20 12 13 37 21 20 13 67 95 15 37 12 33 16 44 13 12 17 51 12 78 18 00 12 90 19 65 13 30 20 72 13 61 100 14 99 12 00 16 06 12 78 17 13 12 47 17 77 12 70 19 28 13 01 20 35 13 33 105 14 62 11 67 15 69 12 45 16 76 12 17 17 53 12 50 18 90 12 73 19 97 13 05 110 14 24 11 27 15 32 12 05 16 39 11 79 17 16 12 13 18 53 12 36 19 60 12 70 115 13 87 10 93 14 94 11 71 16 01 11 48 16 79 11 82 18 15 12 07 19 22 ...

Page 22: ...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 25 9 90 25 23 11 30 11 20 11 13 11 10 11 00 10 60 30 28 11 95 11 85 11 78 11 75 11 65 11 30 35 32 12 60 12 50 12 43 12 40 12 30 12 00 40 36 13 18 13 08 13 02 12 98 12 88 12 58 45 41 13 77 13 67 13 60 13 57 13 47 13 17 47 43 14 00 13 90 13 83 13 80 13 70 13 40 50 46 14 23 14 13 1...

Page 23: ...0 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold LMAN097HVT LMAN127HVT LMAN187HVT Model No Soun...

Page 24: ...HVT Air Velocity and Temperature Distribution Charts Cooling Heating 72 68 75 64 Air velocity ft s Temperature F 3 3 6 6 4 9 1 6 9ft 7ft 3ft 0ft 16ft 13ft 10ft 7ft 3ft 0ft 9ft 7ft 3ft 0ft 16ft 13ft 10ft 7ft 3ft 0ft 3 3 6 6 4 9 1 6 Air velocity ft s Temperature F 70 75 81 86 91 9ft 7ft 3ft 0ft 16ft 13ft 10ft 7ft 3ft 0ft 9ft 7ft 3ft 0ft 16ft 13ft 10ft 7ft 3ft 0ft Discharge angle 40 Discharge angle 5...

Page 25: ...0ft 16ft 13ft 10ft 7ft 3ft 0ft 64 68 72 75 3 3 1 6 8 2 4 9 Air velocity ft s Temperature F 9ft 7ft 3ft 0ft 16ft 13ft 10ft 7ft 3ft 0ft 9ft 7ft 3ft 0ft 16ft 13ft 10ft 7ft 3ft 0ft Discharge angle 40 Discharge angle 50 ART COOL MIRROR 25 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 Al...

Page 26: ...ort flare connection Liquid pipe connection port flare connection Cooling Heating Thermistor for Evaporator Inlet Temperature Thermistor for Indoor Air Temperature Thermistor for Evaporator Outlet Temperature Heat Exchanger Cross Flow Fan M ART COOL MIRROR INDOOR UNITS Refrigerant Flow Diagram Figure 9 Art Cool Mirror Indoor Unit Refrigerant Flow Diagram Due to our policy of continuous product inn...

Page 27: ...N127HVT Indoor Units Wiring Diagram ART COOL MIRROR 27 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 MULTI FMAX MULTI F ...

Page 28: ... Diagram 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 28 ART COOL MIRROR Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 29: ...lation work must be performed by authorized personnel and in accordance with the national wiring standards and all local codes Factory Supplied Parts and Materials ART COOL MIRROR INDOOR UNITS 7 000 15 000 Btu h Indoor Units 18 000 and 24 000 Btu h Indoor Units Table 19 Parts Table Required Tools LMAN097HVT and LMAN127HVT LMAN187HVT ART COOL MIRROR 29 Art Cool Mirror Due to our policy of continuou...

Page 30: ...stallation Plate Side View Installation Plate Frame Hook Type A Screws Ø2 3 4 inches Ø2 3 4 inches 5 1 4 inches 3 3 4 inches Right rear piping Left rear piping Installation Plate Place a level on raised tab Unit Outline 8 17 32 inches 6 7 8 inches Figure 14 Installation Plate for LMAN097HVT and LMAN127HVT Units Figure 15 Installation Plate for LMAN187HVT Units Ø2 3 4 inches Ø2 3 4 inches 2 23 32 i...

Page 31: ...allation through the wall press on the top of the tubing clamp and slowly guide the piping hose down depending on instal lation requirements then to the left or right Relock the tubing clamp after the piping hose are released Do not bend the piping drain hose from side to side it may damage the components Figure 16 Preparing for Installation Installation plate Figure 17 Locking the Indoor Unit ont...

Page 32: ... and away from the indoor unit without leaking ART COOL MIRROR INDOOR UNITS Installation and Best Layout Practices Refrigerant Piping Insulation Field installed vapor and liquid refrigerant piping lines must be properly and completely cov ered in insulation up to the indoor unit piping connections Any exposed piping may generate condensate or will cause burns if touched Insulation for this field i...

Page 33: ...unit 2 Connect each wire to its appropriate terminal on the indoor unit control board Verify that the color and terminal numbers from the outdoor unit or branch distribution unit Multi F MAX systems only wiring match the color and terminal numbers on the indoor unit 3 Secure the power wiring communications cable with the cable restraint Terminal block Power wiring communications cable Wired Remote...

Page 34: ...Auto operation or auto changeover Dehumidifying operation Heating operation Air circulation Jet Cool Jet Heat Button1 Warms up or cools down the indoor temperature within a short period Air Flow Direction Button Adjusts the airflow direction vertically or horizontally Temperature Display Button Displays the room temperature Press and hold button down for five 5 seconds Display changes from C to F ...

Page 35: ...re 32 Wired Controller Connection on the Indoor Unit Terminal Block LMAN097HVT and LMAN127HVT models Indoor Unit Terminal Block 1 L1 2 L2 GND GRN YLW BR BL RD CN REMO To Outdoor Unit or Branch Distribution Unit Multi F MAX Systems Only To Wired Controller 3 Figure 33 Wired Controller Connection on the Indoor Unit Terminal Block LMAN187HVT models Figure 34 Proper Location for the Wired Controller I...

Page 36: ...ble can be installed in one of three direc tions 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 2 Choose and mark the area of installation and then screw the wall plate into place using the provided parts Install the controller wall plate to fit the electrical box if one is pr...

Page 37: ...ble 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 UNIT DATA ...

Page 38: ... natural outdoor breeze Air Filter Return air is filtered with a factory supplied removable washable pre filter Filter access is from the front of the unit without the use of tools Airflow Guide Vanes Motorized oscillating guide vanes are factory installed and allows the ability to control the direction of airflow from side to side A motorized air sweep louver provides an automatic change in airfl...

Page 39: ...erence between outdoor and indoor units All capacities are net with a combination ratio between 95 105 Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb DB and 67ºF wet bulb WB and outdoor ambient conditions of 95ºF dry bulb DB and 75ºF wet bulb WB Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry bulb DB and 60ºF wet b...

Page 40: ...y Air Supply Air Discharge Air Grille Supply Air Vane 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 40 ART COOL GALLERY Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 41: ...0 95 7 23 11 63 7 64 12 31 7 39 12 81 7 55 13 68 7 61 14 36 7 76 35 10 95 7 28 11 63 7 69 12 31 7 45 12 80 7 61 13 66 7 67 14 34 7 82 40 10 94 7 34 11 62 7 75 12 30 7 51 12 79 7 66 13 65 7 73 14 33 7 87 45 10 93 7 39 11 61 7 81 12 29 7 56 12 78 7 72 13 64 7 79 14 32 7 93 50 10 92 7 45 11 60 7 87 12 28 7 62 12 77 7 78 13 63 7 84 14 31 7 99 55 10 91 7 50 11 59 7 92 12 27 7 67 12 76 7 83 13 62 7 90 1...

Page 42: ...9 54 9 44 9 14 20 19 10 17 10 07 10 01 9 98 9 88 9 54 25 23 10 89 10 79 10 73 10 70 10 60 10 22 30 28 11 52 11 42 11 36 11 32 11 23 10 89 35 32 12 14 12 05 11 98 11 95 11 85 11 57 40 36 12 71 12 61 12 55 12 51 12 42 12 13 45 41 13 27 13 17 13 11 13 08 12 98 12 69 47 43 13 49 13 40 13 33 13 30 13 20 12 91 50 46 13 71 13 61 13 55 13 52 13 42 13 10 55 51 14 07 13 97 13 91 13 88 13 78 13 40 60 56 14 0...

Page 43: ...ound Pressure Levels dB A Figure 43 Sound Pressure Level Diagrams ART COOL GALLERY INDOOR UNITS 2 6ft 3 3ft Microphone s Octave Band Center Frequency Hz Octave Band Sound Pressure Level 0dB 20μPa 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold Octave Band Center Frequency Hz Octave Band Sound...

Page 44: ...7ft 3ft 0ft Discharge angle 40 Discharge angle 50 Cooling Heating 1 6 3 3 4 9 6 6 66 63 59 55 52 Air velocity ft s Temperature F 9ft 7ft 3ft 0ft 16ft 13ft 10f t 7ft 3ft 0ft 9ft 7ft 3ft 0ft 16ft 13ft 10f t 7ft 3ft 0ft 95 91 99 102 106 109 11 3 1 6 3 3 4 9 6 6 8 2 Air velocity ft s Temperature F 9ft 7ft 3ft 0ft 16ft 13ft 10f t 7ft 3ft 0ft 9ft 7ft 3ft 0ft 16ft 13ft 10f t 7ft 3ft 0ft Discharge angle 4...

Page 45: ... Temperature Thermistor Evaporator Outlet Temperature Thermistor CN TH2 Water Level Sensor Optional CN TH3 Gas pipe connection port flare connection Liquid pipe connection port flare connection Cooling Heating Thermistor for Evaporator Inlet Temperature Thermistor for Indoor Air Temperature Thermistor for Evaporator Outlet Temperature Heat Exchanger Turbo Fan M ART COOL GALLERY 45 Art Cool Gallery...

Page 46: ...ITS 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 46 ART COOL GALLERY Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 47: ...meter Read all instructions before installing the product Installation work must be performed by authorized personnel and in accordance with the national wiring standards and all local codes Factory Supplied Parts and Materials Table 27 Parts Table Required Tools ART COOL GALLERY INDOOR UNITS ART COOL GALLERY 47 Art Cool Gallery Due to our policy of continuous product innovation some specification...

Page 48: ...ews Drill one 1 two 2 inch diameter hole for the field installed refrigerant and drain piping 3 Insert a plastic anchor into each of the mounting holes 4 Screw the top two 2 screws into the wall Do not flush them to the wall leave a 7 16 inch space for hanging the indoor unit Figure 49 Using the Installation Guide If the unit is installed near a body of water certain components are at risk of bein...

Page 49: ...refrigerant piping will be connected through the back of the unit the access hole does not need to be knocked out 3 Remove any burrs that may have been made Side cover Access Hole for Piping Figure 51 Removing the Piping and Side Covers Preparing the Drain Hose 1 Remove the rubber stopper from the chosen side of the indoor unit 2 Insert the drain hose into the handle of the drain pan 3 Connect the...

Page 50: ... tape where they meet near the indoor unit frame Po sition the drain hose at the bottom of the bundle positioning the drain hose at the top of the bundle may cause the drain pan to overflow inside the indoor unit Drain hose Loop Connecting pipe Power wiring Communication cable Tape Drain hose 1 2 Figure 53 Preparing the Refrigerant Drain Connections 1 Press on the top of the clamp and then slowly ...

Page 51: ... flows through and out of the hose and away from the indoor unit without leaking Indoor Unit s Drain extension Refrigerant Piping Insulation Field installed vapor and liquid refrigerant piping lines must be properly and completely covered in insulation up to the indoor unit piping connections Any exposed piping may generate condensate or will cause burns if touched Insulation for this field instal...

Page 52: ... unit Multi F MAX systems only wiring match the color and terminal numbers on the indoor unit 3 Secure the power wiring communications cable to the control board 4 Reattach the control board cover Figure 62 Simplified View of Indoor Unit to Outdoor Unit Branch Distribution Unit Terminal Connections LMAN097HVP and LMAN127HVP models Follow manufacturer s circuit diagrams in the technical manuals Con...

Page 53: ... selection button1 Selects the operation mode Cooling operation Auto operation or auto changeover Dehumidifying operation Heating operation Jet Cool Jet Heat Button1 Warms up or cools down the indoor temperature within a short period Air Flow Direction Button Adjusts the airflow direction Temperature Display Button Displays the room temperature Press and hold button down for five 5 seconds to chan...

Page 54: ...ller and then position wiring cable on applicable side 2 Choose and mark the area of installation and then screw the wall plate into place using the provided parts Install the controller wall plate to fit the electrical box if one is present Ensure that no gaps exist between the wall plate and the wall itself 3 Arrange wiring cables so as not to interfere with the controller circuitry Position the...

Page 55: ...hat the side covers are closed or opened depending on installation requirements Place the power wiring communica tions cable in the bottom groove along the left side of the frame 2 Reconnect the panel connector found at the top of the indoor unit 3 Attach the top part of the front panel then position its tabs in the grooves on the bottom part of the indoor unit frame 4 To ensure the front panel ta...

Page 56: ... 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 56 ART COOL GALLERY Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 57: ... on page 64 Heating Capacity Table on page 67 Acoustic Data on page 69 Air Velocity and Temperature Distribution on page 71 Refrigerant Flow Diagram on page 74 Wiring Diagram on page 75 Factory Supplied Parts and Materials on page 79 Installation and Best Layout Practices on page 80 STANDARD WALL MOUNTED INDOOR UNIT DATA ...

Page 58: ...or fan has Low Med High Power Cool and Auto settings for Cooling mode and has Low Med High and Auto settings for Heating mode The Auto setting adjusts the fan speed based on the difference between the controller setpoint and space temperature Also the separate Chaos setting provides a simultaneous and random change in fan speed and flow direction at the discharge simulating a natural outdoor breez...

Page 59: ...r Wiring Communications Cable No x AWG 5 4 x 18 Heat Exchanger Row x Column x Fin inch x Number 2 x 16 x 23 x 1 3 x 18 x 22 x 1 Pipe Size Liquid in 1 4 Vapor in 3 8 1 2 Connection Size Liquid in 1 4 3 8 1 4 Vapor in 3 8 5 8 1 2 Drain O D I D in 27 32 5 8 Table 29 Multi F Standard Wall Mounted Indoor Unit General Data STANDARD WALL MOUNTED INDOOR UNITS 1 Nominal capacity is rated 0 ft above sea lev...

Page 60: ...Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp 60 STD WALL MOUNTED Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F Dimensions STANDARD WALL MOUNTED INDOOR UNITS Figure 71 LMN077HVT and LMN157HVT Dimensions Supply Air Vane Return Air Inlet Return Air Inlet Supply Air Vane ...

Page 61: ...may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp MULTI FMAX MULTI F Dimensions STANDARD WALL MOUNTED INDOOR UNITS Figure 72 LMN247HVT Dimensions Return Air Inlet Return Air Inlet Supply Air Vane Supply Air Vane Supply Air Vane ...

Page 62: ... WALL MOUNTED Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F Dimensions STANDARD WALL MOUNTED INDOOR UNITS Figure 73 LSN090HSV4 and LSN120HSV4 Dimensions Ø2 9 16 5 3 16 3 6 8 Right rear piping Left rear piping Place a level on raised tab Unit Outline 8 1 2 6 7 8 17 3 8 17 3 8 3 34 7 8 8 1 4 1 3 4 2 2 3 16 1 3 4 2 3 8 2 11 1 4 2 1 4 2 5 16 6 5 16 5 7 8 Ø2 9 16 Unit inch R...

Page 63: ...rved LG is a registered trademark of LG Corp MULTI FMAX MULTI F Dimensions STANDARD WALL MOUNTED INDOOR UNITS Figure 74 LSN180HSV4 Dimensions 40 9 16 12 13 16 9 13 16 Ø2 9 16 Right rear piping Left rear piping Measuring Tape Measuring Tape Hanger Place a level on raised tab Unit Outline 18 1 8 22 3 8 8 1 8 4 1 8 2 11 16 2 3 16 Ø2 9 16 4 9 13 16 2 1 2 1 3 4 2 1 32 2 1 32 1 3 4 Unit inch Return Air ...

Page 64: ... 39 4 70 122 5 28 4 11 5 69 4 41 6 11 4 33 6 41 4 46 6 94 4 56 7 36 4 70 LSN090HSV4 9 000 14 8 82 6 04 9 37 6 38 9 92 6 18 10 31 6 31 11 01 6 36 11 56 6 48 20 8 82 6 09 9 36 6 43 9 91 6 23 10 31 6 36 11 01 6 41 11 55 6 53 25 8 81 6 13 9 36 6 48 9 90 6 27 10 30 6 41 11 00 6 46 11 54 6 58 30 8 80 6 18 9 35 6 53 9 90 6 32 10 29 6 46 10 99 6 51 11 54 6 63 35 8 80 6 23 9 34 6 58 9 89 6 37 10 28 6 50 10...

Page 65: ...99 9 48 14 71 9 68 85 10 83 8 76 11 54 9 29 12 26 9 03 12 78 9 24 13 70 9 36 14 42 9 56 90 10 55 8 60 11 26 9 13 11 98 8 88 12 50 9 10 13 42 9 22 14 13 9 43 95 10 25 8 51 10 96 9 05 11 67 8 82 12 00 8 90 13 10 9 18 13 81 9 39 100 10 00 8 28 10 71 8 82 11 42 8 61 11 84 8 76 12 85 8 98 13 56 9 20 105 9 75 8 05 10 46 8 59 11 17 8 40 11 69 8 62 12 60 8 78 13 31 9 01 110 9 50 7 77 10 21 8 31 10 92 8 14...

Page 66: ...12 01 18 92 12 36 LMN247HVT 24 000 14 23 53 16 82 24 99 17 77 26 45 17 21 27 50 17 57 29 37 17 72 30 83 18 05 20 23 51 16 95 24 97 17 91 26 43 17 34 27 48 17 70 29 35 17 85 30 81 18 19 25 23 49 17 08 24 95 18 05 26 41 17 47 27 46 17 84 29 33 17 99 30 79 18 33 30 23 47 17 21 24 93 18 19 26 39 17 61 27 44 17 98 29 30 18 13 30 76 18 47 35 23 46 17 35 24 91 18 32 26 37 17 74 27 42 18 12 29 28 18 27 30...

Page 67: ...8 86 8 78 8 52 35 32 9 50 9 42 9 37 9 34 9 27 9 04 40 36 9 94 9 86 9 81 9 78 9 71 9 48 45 41 10 37 10 30 10 25 10 22 10 15 9 92 47 43 10 55 10 48 10 43 10 40 10 32 10 10 50 46 10 72 10 64 10 59 10 57 10 49 10 24 55 51 11 00 10 93 10 88 10 85 10 78 10 48 60 56 11 00 10 93 10 88 10 85 10 78 10 52 63 59 11 00 10 93 10 88 10 85 10 78 10 55 68 64 11 00 10 93 10 88 10 85 10 78 10 60 LSN120HSV4 12 000 0 ...

Page 68: ...16 73 16 58 15 98 30 28 18 01 17 86 17 76 17 71 17 56 17 03 35 32 18 99 18 84 18 74 18 69 18 54 18 09 40 36 19 87 19 72 19 62 19 57 19 42 18 97 45 41 20 75 20 60 20 50 20 45 20 30 19 85 47 43 21 10 20 95 20 85 20 80 20 65 20 20 50 46 21 44 21 29 21 19 21 14 20 99 20 48 55 51 22 01 21 86 21 75 21 70 21 55 20 95 60 56 22 01 21 86 21 75 21 70 21 55 21 04 63 59 22 01 21 86 21 75 21 70 21 55 21 10 68 6...

Page 69: ...evels dB A 2 6 ft 3 3 ft Microphone LSN090HSV4 LSN120HSV4 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 Octave Band Center Frequency Hz NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 Octave Band Center Frequency Hz NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 6...

Page 70: ...nd Center Frequency Hz Octave Band Sound Pressure Level dB re 20Pa 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximat e Hearing Threshold Octave Band Center Frequency Hz Octave Band Sound Pressure Level dB re 20Pa 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 ...

Page 71: ...erature F 75 72 68 64 9ft 7ft 3ft 0ft 16ft 13ft 10f t 7ft 3ft 0ft 9ft 7ft 3ft 0ft 16ft 13ft 10f t 7ft 3ft 0ft Air velocity ft s Temperature F 9ft 7ft 3ft 16ft 13ft 10f t 7ft 3ft 0ft 9ft 7ft 3ft 0ft 0ft 16ft 13ft 10f t 7ft 3ft 0ft Air velocity ft s 4 9 3 3 1 6 75 81 75 70 86 91 Discharge angle 40 Discharge angle 50 Cooling Heating Discharge angle 45 Discharge angle 50 Air velocity ft s 8 9ft 6 6ft ...

Page 72: ...8 9ft 6 6ft 4 0ft 0ft Air velocity ft s Temperature F 2 5 4 1 3 3 4 9 1 6 82 4 84 2 86 8 9ft 6 6ft 4 0ft 0ft 0ft 3 3ft 6 6ft 9 8ft 13 1ft 16 4ft 8 9ft 6 6ft 4 0ft 0ft 0ft 3 3ft 6 6ft 9 8ft 13 1ft 16 4ft Discharge angle 45 Discharge angle 50 Air Velocity and Temperature Distribution STANDARD WALL MOUNTED INDOOR UNITS Figure 81 LMN157HVT Air Velocity and Temperature Distribution Charts Cooling Heati...

Page 73: ...ocity ft s Temperature F 2 5 4 1 3 3 4 9 1 6 82 4 84 2 86 87 8 8 9ft 6 6ft 4 0ft 0ft 8 9ft 6 6ft 4 0ft 0ft 0ft 3 3ft 6 6ft 9 8ft 13 1ft 16 4ft 19 7ft 23ft 26 2ft 0ft 3 3ft 6 6ft 9 8ft 13 1ft 16 4ft 19 7ft 23ft 26 2ft Discharge angle 45 Discharge angle 50 Air Velocity and Temperature Distribution STANDARD WALL MOUNTED INDOOR UNITS Figure 83 LMN247HVT Air Velocity and Temperature Distribution Charts...

Page 74: ...perature Thermistor for Indoor Air Temperature Thermistor for Evaporator Outlet Temperature Heat Exchanger Cross Flow Fan M Table 36 Multi F Standard Wall Mounted Indoor Unit Refrigerant Pipe Connection Port Diameters Model No Vapor inch Liquid inch LMN077HVT Ø3 8 Ø1 4 LSN090HSV4 LSN120HSV4 LMN157HVT LSN180HSV4 Ø5 8 Ø3 8 LMN247HVT Ø1 2 Ø1 4 Table 37 Multi F Standard Wall Mounted Indoor Unit Thermi...

Page 75: ...ications may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp MULTI FMAX MULTI F Wiring Diagram STANDARD WALL MOUNTED INDOOR UNITS Figure 85 Multi F Standard Wall Mounted LMN077HVT and LMN157HVT Indoor Units Wiring Diagram ...

Page 76: ...nics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp 76 STD WALL MOUNTED Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F Wiring Diagram STANDARD WALL MOUNTED INDOOR UNITS Figure 86 Multi F Standard Wall Mounted LMN247HVT Indoor Unit Wiring Diagram ...

Page 77: ...cations may change without notification LG Electronics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp MULTI FMAX MULTI F Wiring Diagram STANDARD WALL MOUNTED INDOOR UNITS Figure 87 Multi F Standard Wall Mounted LSN090HSV4 and LSN120HSV4 Indoor Units Wiring Diagram ...

Page 78: ...ics U S A Inc Englewood Cliffs NJ All rights reserved LG is a registered trademark of LG Corp 78 STD WALL MOUNTED Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F Wiring Diagram STANDARD WALL MOUNTED INDOOR UNITS Figure 88 Multi F Standard Wall Mounted LSN180HSV4 Indoor Unit Wiring Diagram ...

Page 79: ...ole core drill Flaring tool set Spanner Half union Thermometer Factory Supplied Parts and Materials Table 38 Parts Table Required Tools STANDARD WALL MOUNTED INDOOR UNITS Part Quantity Image Installation Plate One 1 Type A Screws Five 5 Type B Screws M4 x 12L Two 2 Wireless Controller with Holder HVT AKB73635606 HSV AKB73835312 One 1 7 000 15 000 Btu h Indoor Units 18 000 and 24 000 Btu h Indoor U...

Page 80: ...e The mounting wall should be strong and solid enough to protect the unit from vibration Mount the installation plate on the wall using the Type A screws If mounting the unit on concrete consider using anchor bolts Always mount the installation plate horizontally Measure the wall and mark the centerline using thread and a level Figure 90 Installation Plate Side View Installation Plate Frame Hook T...

Page 81: ... 2 screws remove the frame cover remove the piping connection cover and position the piping for installation down back left or right 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 instal lation requirements then to the left or right ...

Page 82: ...UNTED INDOOR UNITS Figure 103 Drain Piping Slope Checking the Drainage System Drain pan Drain hose Drain hose connection Check for leaks Check for leaks Figure 104 Checking the Drainage System Drain Slope Drain hose should point down so water can flow away easily Slope Down 1 Pour water on the indoor unit evaporator 2 Ensure the water flows through and out of the hose and away from the indoor unit...

Page 83: ... Power Wiring and Communications Cable 1 Insert the power wiring communications cable from the outdoor unit or branch distribution unit Multi F MAX systems only through the bottom of the indoor unit 2 Connect each wire to its appropriate terminal on the indoor unit control board Verify that the color and terminal numbers from the outdoor unit or branch distribution unit Multi F MAX systems only wi...

Page 84: ...utton1 Sets the sleep mode auto operation Temperature Adjustment Buttons Raises or lowers temperature setpoint in cooling and heating operation On Off Button Turns the power on off Indoor Fan Speed Button Changes the fan speed Operation mode selection button1 Selects the operation mode Cooling operation Auto operation or auto changeover Dehumidifying operation Heating operation Air circulation Jet...

Page 85: ...temperature when cooling and heating On Off button Turns the power on off Indoor fan speed button Adjusts fan speed Operation mode selection button Selects the operation mode Cooling operation Auto operation or auto changeover Dehumidifying operation Heating operation Jet cooling button Cools the indoor temperature within a short period of time Air flow direction button Adjusts the air flow direct...

Page 86: ...ve 5 feet above the floor where its LED display can be read easily in an area with good air circulation and where it can detect an aver age room temperature Do not install the wired controller near or in Drafts or dead spots behind doors and in corners Hot or cold air from ducts Radiant heat from the sun or appliances Concealed pipes and chimneys An area where temperatures are uncontrolled such as...

Page 87: ...g the Controller Removing the Controller Figure 118 Removing the Cable Guide Grooves Figure 119 Attaching the Wall Plate Figure 120 Installing Removing the Controller Finalizing Indoor Unit Installation 1 Move the tubing clamp to its original position 2 Ensure the three 3 hooks are properly attached to the installa tion plate by gently shaking the indoor unit from side to side 3 Press the bottom l...

Page 88: ... 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 88 STD WALL MOUNTED Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 89: ...e on page 93 Heating Capacity Table on page 95 External Static Pressure on page 96 Acoustic Data on page 97 Refrigerant Flow Diagram on page 98 Wiring Diagram on page 100 Factory Supplied Parts and Materials on page 101 Installation and Best Layout Practices on page 102 CEILING CONCEALED DUCT LOW STATIC INDOOR UNIT DATA ...

Page 90: ...d High and Auto settings for Heating mode Each of the settings can be field adjusted from the factory setting RPM ESP The Auto setting adjusts the fan speed based on the difference between the controller set point and space temperature Air Filter Return air is filtered with a factory supplied removable washable filter accessible from the rear of the indoor unit Microprocessor Control The unit is p...

Page 91: ...t and a 0 ft level difference between outdoor and indoor units All capacities are net with a combination ratio between 95 105 Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb DB and 67ºF wet bulb WB and outdoor ambient conditions of 95ºF dry bulb DB and 75ºF wet bulb WB Nominal heating capacity rating obtained with air entering the indoor unit at 70ºF dry...

Page 92: ...nection 2 Gas pipe connection 3 Drain pipe connection 4 Power supply connection 5 Air outlet 6 Air intake Number Descripition unit inch 25 32 D 5 6 2 1 3 4 11 1 2 4 11 16 2 5 8 7 15 32 L1 14 13 32 L2 22 3 32 3 15 16 3 11 16 27 9 16 7 15 32 25 32 6 3 32 24 23 32 8 21 32 B A C 5 5 16 1 11 32 Gravity point L1 2 15 16 L2 3 1 16 Due to our policy of continuous product innovation some specifications may...

Page 93: ...17 8 16 105 7 31 7 15 7 84 7 63 8 38 7 45 8 77 7 66 9 45 7 79 9 99 7 99 110 7 12 6 90 7 66 7 38 8 19 7 22 8 58 7 43 9 26 7 57 9 80 7 77 115 6 94 6 69 7 47 7 17 8 01 7 03 8 39 7 24 9 08 7 39 9 61 7 60 118 6 82 6 65 7 36 7 13 7 89 7 00 8 28 7 21 8 96 7 37 9 50 7 58 122 6 79 6 63 7 32 7 11 7 86 6 98 8 24 7 19 8 93 7 36 9 46 7 57 LMDN126HV 12 000 14 11 76 9 94 12 49 10 50 13 22 10 17 13 75 10 38 14 69...

Page 94: ... 15 37 13 09 16 44 13 93 17 51 13 57 18 00 13 70 19 65 14 12 20 72 14 46 100 14 99 12 74 16 06 13 58 17 13 13 25 17 77 13 49 19 28 13 82 20 35 14 16 105 14 62 12 39 15 69 13 23 16 76 12 93 17 53 13 28 18 90 13 52 19 97 13 86 110 14 24 11 97 15 32 12 80 16 39 12 53 17 16 12 88 18 53 13 13 19 60 13 48 115 13 87 11 61 14 94 12 44 16 01 12 19 16 79 12 55 18 15 12 82 19 22 13 18 118 13 65 11 53 14 72 1...

Page 95: ... 14 06 14 03 13 93 13 59 55 51 14 60 14 50 14 43 14 40 14 30 13 90 60 56 14 60 14 50 14 43 14 40 14 30 13 96 63 59 14 60 14 50 14 43 14 40 14 30 14 00 68 64 14 60 14 50 14 43 14 40 14 30 14 06 LMDN186HV 18 000 0 0 4 10 70 10 55 10 45 10 40 10 25 9 80 5 4 5 12 06 11 91 11 81 11 76 11 61 11 15 10 9 13 41 13 26 13 16 13 11 12 96 12 51 17 15 15 22 15 07 14 97 14 92 14 77 14 29 20 19 15 90 15 75 15 65 ...

Page 96: ...186HV 18 000 High 530 123 125 129 134 141 145 Mid 441 109 112 117 123 129 136 Low 353 95 99 104 109 116 124 To get the desired air flow and external static pressure combination use the setting value from the table Using a setting value other than that listed in the table will not provide the desired combination Table data is based at 230V Air flow rate varies according to voltage fluctuation Due t...

Page 97: ...nd Sound Pressure Level 0dB 20μPa 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold Octave Band Center Frequency Hz Octave Band Sound Pressure Level 0dB 20μPa 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate...

Page 98: ...tor Indoor Air Temperature Thermistor CN ROOM Evaporator Inlet Temperature Thermistor CN PIPE IN Evaporator Outlet Temperature Thermistor CN PIPE OUT Indoor Unit Cooling Heating M Sirocco Fan Indoor Air Temperature Thermistor Evaporator Outlet Temperature Thermistor Evaporator Inlet Temperature Thermistor Due to our policy of continuous product innovation some specifications may change without not...

Page 99: ...ption Based on Cooling Mode PCB Connector Indoor Air Temperature Thermistor CN ROOM Evaporator Inlet Temperature Thermistor CN PIPE IN Evaporator Outlet Temperature Thermistor CN PIPE OUT Indoor Unit Cooling Heating M M Sirocco Fan Indoor Air Temperature Thermistor Evaporator Outlet Temperature Thermistor Evaporator Inlet Temperature Thermistor DUCT LOW STATIC 99 Ceiling Concealed Duct Low Static ...

Page 100: ... DUCT LOW STATIC INDOOR UNITS 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 100 DUCT LOW STATIC Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 101: ...rench Gas leak detector Thermometer Table 51 Parts Table For Vapor Piping For Liquid Piping 1 Simple Mode Controllers for the ceiling concealed duct low static indoor units are also referenced by Model No PQRCVCL0QW Read all instructions before installing the product Installation work must be performed by authorized personnel and in accordance with the national wiring standards and all local codes...

Page 102: ...rone to humidity levels of 80 or more near the ocean lakes etc or where steam could collect in the plenum Install additional insulation to the indoor unit glass wool insulation 13 32 inches thick Install additional insulation to the refrigerant piping insulation 13 16 inches thick Seal all gaps between the indoor unit and the ceiling tiles make the area air tight so that humidity does not transfer...

Page 103: ...and spring washers Adjust for level as necessary Unit must be installed correctly Tighten the nuts and bolts to prevent the unit from falling Figure 134 Preparing the Installation Area Figure 132 Air inlet from the bottom of the indoor unit Figure 133 Indoor Unit Bolt Locations Indoor Unit s Air Filter Air Outlet Air Outlet Air Filter Back Panel Back Panel DUCT LOW STATIC INDOOR UNITS Duct Low Sta...

Page 104: ...in Ducted low static indoor units have two options for condensate drainage Using the factory installed drain pump or using a gravity drain Pour Water Drain Pump Drain Pan Flexible drain hose accessory Field Installed Drain Piping Glue the Joint Drain Port Drain Hose Connection Use the clip accessory Indoor Unit Checking the Drain Pump The unit uses a drain pump to remove condensate The pump must b...

Page 105: ... install glass wool insulation on all indoor unit that are located in the ceiling plenum Drain Piping Insulation Drain piping must have insulation a minimum of 7 32 inches thick DUCT LOW STATIC INDOOR UNITS Installation and Best Layout Practices Figure 142 Insulating the Piping Liquid Piping Connection Insulation for Refrigerant Piping Field Supplied Vapor Piping Connection Insulation Field Suppli...

Page 106: ...box cover and ensure the cover firmly closes 5 Fill in any gaps around the wiring access hole with sealant to prevent foreign particles from entering the indoor unit Indoor Unit Terminal Block 1 L 2 N GND 3 Outdoor Unit Terminal Block or Branch Distribution Unit Terminal Block Multi F MAX Systems Only GND GRN YLW BR BL RD 3 or S Figure 143 Indoor Unit to Outdoor Unit Branch Distribution Unit Multi...

Page 107: ...humidification or Fan Figure 146 PZCWRC1 LG Wired Remote Extension Cable Verify the connectors are properly inserted C BOX Cable Plug type Extension cable To Indoor Unit CN REMO Terminal TEMP FAN SPEED OPER MODE Figure 147 Wired Controller Connections on the Indoor Unit Terminal Block When using field supplied controller cable make sure to connect the yellow to yellow communications wire red to re...

Page 108: ...oice of sensing temperature with either the indoor unit return air thermistor or the thermistor in the wired controller It is also an option to set both thermistors to sense temperature so that indoor unit bases its operation on the first thermistor to reach the designated temperature differen tial For applicable indoor units an optional Remote Temperature Sensor can be used in lieu of the return ...

Page 109: ...cally deactivate Select the position after verifying duct work and the external static pressure of the indoor unit Factory set to pressure selection F H Table 54 Static Pressure Setting Table Pressure Selection Function Zone State External Static Pressure Standard Value 01 V H Variable High 02 F H Fixed High 03 V L Variable Low 04 F L Fixed Low TEMP FAN SPEED OPER MODE TEMP FAN SPEED OPER MODE Cod...

Page 110: ...ee 3 seconds Choose setting code value 03 by press ing the mode selection button 2 Use the fan speed button to select the desired fan speed Lo Med Hi will display on the LED 3 Use the temperature increase and decrease buttons to select the desired external static pressure setting value thereby assigning the respective airflow External static pressure value range 0 255 the value will display near t...

Page 111: ...on page 115 Heating Capacity Table on page 116 External Static Pressure on page 117 Acoustic Data on page 117 Refrigerant Flow Diagrams on page 118 Wiring Diagram on page 119 Factory Supplied Parts and Materials on page 120 Installation and Best Layout Practices on page 121 CEILING CONCEALED DUCT HIGH STATIC INDOOR UNIT DATA ...

Page 112: ...ttings for Cooling mode and has Low Med High and Auto settings for Heating mode Each of the settings can be field adjusted from the factory setting RPM ESP The Auto setting adjusts the fan speed based on the difference between the controller setpoint and space temperature Air Filter Return air is filtered with a factory supplied removable washable filter accessible from the rear of the indoor unit...

Page 113: ...R UNITS General Data Specifications 1 Nominal capacity is rated 0 ft above sea level with corresponding refrigerant piping length in accordance with standard length of each outdoor unit and a 0 ft level difference between outdoor and indoor units All capacities are net with a combination ratio between 95 105 Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bul...

Page 114: ...NDOOR UNITS 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 114 DUCT HIGH STATIC Multi F and Multi F MAX Indoor Unit Engineering Manual ...

Page 115: ... 19 21 42 18 31 22 85 17 87 23 69 18 19 25 70 18 64 27 13 19 10 105 19 49 16 71 20 92 17 84 22 35 17 43 23 38 17 91 25 20 18 23 26 63 18 70 110 18 99 16 14 20 42 17 26 21 85 16 90 22 88 17 37 24 70 17 71 26 13 18 19 115 18 49 15 66 19 92 16 78 21 35 16 45 22 38 16 93 24 20 17 29 25 63 17 77 118 18 19 15 55 19 62 16 68 21 05 16 36 22 08 16 86 23 90 17 23 25 33 17 72 122 18 10 15 51 19 52 16 64 20 9...

Page 116: ...99 28 79 28 70 28 41 27 48 20 19 30 58 30 29 30 10 30 00 29 71 28 70 25 23 32 75 32 46 32 27 32 17 31 88 30 72 30 28 34 64 34 35 34 15 34 06 33 77 32 75 35 32 36 52 36 23 36 04 35 94 35 65 34 78 40 36 38 21 37 92 37 73 37 63 37 34 36 47 45 41 39 90 39 61 39 42 39 32 39 03 38 16 47 43 40 58 40 29 40 10 40 00 39 71 38 84 50 46 41 23 40 94 40 75 40 65 40 36 39 38 55 51 42 32 42 03 41 84 41 74 41 45 4...

Page 117: ...ncealed Duct High Static External Static Pressure Setting Values Table Figure 158 Sound Pressure Level Diagrams 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 meas...

Page 118: ...r Inlet Temperature Thermistor CN PIPE IN Evaporator Outlet Temperature Thermistor CN PIPE OUT Sirocco Fan Heat exchanger Gas pipe connection port flare connection Liquid pipe connection port flare connection Cooling Heating M Thermistor for suction air temperature Thermistor for evaporator outlet temperature Thermistor for evaporator inlet temperature DUCT HIGH STATIC INDOOR UNITS Due to our poli...

Page 119: ...m Figure 161 Multi F Ceiling Concealed Duct High Static LMHN360HV Indoor Units Wiring Diagram DUCT HIGH STATIC 119 Ceiling Concealed 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 ...

Page 120: ...am source or where considerable amounts of oil iron powder or flour are used The unit should not be installed where sulfuric acid and flammable or corrosive gases are generated vented into or stored Avoid installing the unit near high frequency generators or near any equipment that generates an electromagnetic field minimum 3 1 3 feet away Do not install the unit near a doorway The unit may be dam...

Page 121: ...um Install additional insulation to the indoor unit glass wool insulation 13 32 inches thick Install additional insulation to the refrigerant piping insulation 13 16 inches thick Seal all gaps between the indoor unit and the ceiling tiles make the area air tight so that humidity does not transfer from the plenum to the conditioned space Also add a ceiling grille for ventilation Figure 162 Access P...

Page 122: ...0 Nut M10 SP washer M10 washer X 4 X 4 Field supplied X 4 M10 Nut M10 SP washer M10 washer X 4 X 4 X 4 Field supplied Do not apply force or twist the drain hose it may leak 1 50 1 100 slope Hanger distance 3 3 49 2feet Hanger Bracket Maximum 27 9 16 inches Flexible drain hose Insulation Metal clamp Maximum 11 13 16inches Installing the Drain System Drain piping must have downward gradient of at le...

Page 123: ...drain port Figure 171 Insulating the Piping Refrigerant Piping Insulation Field installed vapor and liquid refrigerant piping lines must be prop erly and completely covered in insulation up to the indoor unit piping connections Any exposed piping may generate condensate or will cause burns if touched Insulation for this field installed refrigerant piping must have a minimum heat resistance of 248 ...

Page 124: ... Indoor Unit Terminal Block A Control Box Terminal Block Control Box Cover 1 L1 2 L2 3 Power Wiring Connections Lock nut Conduit mounting plate Conduit Indoor Unit Terminal Block 1 L1 2 L2 GND 3 Outdoor Unit Terminal Block or Branch Distribution Unit Terminal Block Multi F MAX Systems Only GND GRN YLW BR BL RD 3 or S Figure 173 Indoor Unit to Outdoor Unit Branch Distribution Unit Multi F MAX syste...

Page 125: ...election Check Button Selects the operation mode Cooling Heating Auto Dry Dehumidification or Fan Each function will display on the LED for about three 3 seconds when the power is first cycled on TEMP FA N SPEED OPER MODE Operation Display Panel Temperature Control Button Fan Speed Button On Off Button Mode Selection Check Button Figure 174 Exterior View of Conduit Installation Indoor Unit Termina...

Page 126: ...the sun or appliances Concealed pipes and chimneys An area where temperatures are uncontrolled such as an outside wall Figure 178 Proper Location for the Wired Controller Hanging the Wired Controller 1 The controller wiring cable can be installed in one of three direc tions top back or on the right side If top or right side installation is desired remove cable guide grooves on the controller and t...

Page 127: ...mode will automatically deactivate Select the position after verifying duct work and the external static pressure of the indoor unit Factory set to pressure selection F H Table 70 Static Pressure Setting Table Pressure Selection Function Zone State External Static Pressure Standard Value 01 V H Variable High 02 F H Fixed High 03 V L Variable Low 04 F L Fixed Low TEMP FAN SPEED OPER MODE TEMP FAN S...

Page 128: ...ing the mode selection button 2 Use the fan speed button to select the desired fan speed Lo Med Hi will display on the LED 3 Use the temperature increase and decrease buttons to select the desired external static pressure set ting value thereby assigning the respective airflow External static pressure value range 0 255 the value will display near the lower right corner of the LED 4 Press the on of...

Page 129: ...page 134 Heating Capacity Table on page 136 Acoustic Data on page 138 Air Velocity and Temperature Distribution on page 140 Refrigerant Flow Diagram on page 142 Wiring Diagram on page 143 Factory Supplied Parts and Materials on page 144 Installation and Best Layout Practices on page 145 FOUR WAY CEILING CASSETTE INDOOR UNIT DATA ...

Page 130: ...Guide Vanes The supply air outlet has four directional slot diffusers each equipped with an independent oscillating motorized guide vane to change airflow direction A guide vane algorithm sequentially changes the predominant discharge airflow direction in counterclockwise pattern or can be used to lock each guide vane independently in a field adjusted fixed position The four vanes can be individua...

Page 131: ... rated 0 ft above sea level with a 0 ft level difference between outdoor and indoor units All capacities are net with a combination ratio between 95 105 Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb DB and 67ºF wet bulb WB and outdoor ambient conditions of 95ºF dry bulb DB and 75ºF wet bulb WB Nominal heating capacity rating obtained with air entering ...

Page 132: ...R WAY CEILING CASSETTE INDOOR UNITS 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 132 CEILING CASSETTE Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 133: ...OUR WAY CEILING CASSETTE INDOOR UNITS CEILING CASSETTE 133 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 MULTI FMAX MULTI F ...

Page 134: ...6 9 35 6 82 9 90 6 60 10 29 6 74 10 99 6 80 11 54 6 93 35 8 80 6 50 9 34 6 87 9 89 6 65 10 28 6 79 10 98 6 85 11 53 6 98 40 8 79 6 55 9 33 6 92 9 88 6 70 10 27 6 84 10 97 6 90 11 52 7 03 45 8 78 6 60 9 33 6 97 9 87 6 75 10 27 6 90 10 96 6 95 11 51 7 09 50 8 78 6 65 9 32 7 03 9 87 6 80 10 26 6 95 10 96 7 00 11 50 7 14 55 8 77 6 70 9 31 7 08 9 86 6 85 10 25 7 00 10 95 7 06 11 49 7 19 60 8 76 6 75 9 ...

Page 135: ...2 60 8 78 13 31 9 01 110 9 50 7 77 10 21 8 31 10 92 8 14 11 44 8 37 12 35 8 53 13 07 8 76 115 9 25 7 54 9 96 8 08 10 67 7 92 11 19 8 15 12 10 8 33 12 82 8 56 118 9 10 7 49 9 81 8 03 10 52 7 88 11 04 8 12 11 95 8 30 12 67 8 54 122 9 05 7 47 9 76 8 01 10 48 7 87 10 99 8 11 11 90 8 29 12 62 8 53 LMCN185HV 18 000 14 17 65 12 33 18 74 13 02 19 84 12 61 20 63 12 88 22 03 12 98 23 12 13 23 20 17 63 12 43...

Page 136: ...8 7 64 7 62 7 56 7 39 45 41 8 08 8 02 7 98 7 96 7 90 7 73 47 43 8 22 8 16 8 12 8 10 8 04 7 87 50 46 8 35 8 29 8 25 8 23 8 17 7 98 55 51 8 57 8 51 8 47 8 45 8 39 8 16 60 56 8 57 8 51 8 47 8 45 8 39 8 20 63 59 8 57 8 51 8 47 8 45 8 39 8 22 68 64 8 57 8 51 8 47 8 45 8 39 8 25 LMCN097HV 9 000 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 ...

Page 137: ... 15 98 30 28 18 01 17 86 17 76 17 71 17 56 17 03 35 32 18 99 18 84 18 74 18 69 18 54 18 09 40 36 19 87 19 72 19 62 19 57 19 42 18 97 45 41 20 75 20 60 20 50 20 45 20 30 19 85 47 43 21 10 20 95 20 85 20 80 20 65 20 20 50 46 21 44 21 29 21 19 21 14 20 99 20 48 55 51 22 01 21 86 21 75 21 70 21 55 20 95 60 56 22 01 21 86 21 75 21 70 21 55 21 04 63 59 22 01 21 86 21 75 21 70 21 55 21 10 68 64 22 01 21 ...

Page 138: ...ure 189 LMCN077HV and LMCN097HV Sound Pressure Level Diagrams 4 9 ft Ceiling Microphone FOUR WAY CEILING CASSETTE INDOOR UNITS Octave Band Sound Pressure Level dB re 20Pa Octave Band Center Frequency Hz 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold 10 20 30 40 50 60 70 80 90 63 125 250 500 ...

Page 139: ...000 2000 4000 8000 NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Approximate Hearing Threshold LMCN125HV LMCN185HV Acoustic Data FOUR WAY CEILING CASSETTE INDOOR UNITS Figure 190 LMCN125HV and LMCN185HV Sound Pressure Level Diagrams CEILING CASSETTE 139 Four Way Ceiling Cassette Due to our policy of continuous product innovation some specifications may change without notificati...

Page 140: ...0ft 9ft 7ft 3ft 0ft 5ft 5ft 8ft 8ft 0ft 5ft 5ft 8ft 8ft 0ft Cooling Heating Discharge angle 40 Air velocity ft s Temperature F 9ft 7ft 3ft 0ft 0ft 5ft 5ft 8ft 8ft 0ft 9ft 7ft 3ft 0ft 5ft 5ft 8ft 8ft 0ft 9ft 7ft 3ft 5ft 5ft 8ft 8ft 0ft 0ft 9ft 7ft 3ft 5ft 5ft 8ft 8ft 0ft 6 6 6 6 4 9 4 9 3 3 3 3 1 6 1 6 64 64 68 68 72 72 75 75 Discharge angle 50 Air velocity ft s Temperature F 6 6 6 6 4 9 4 9 3 3 3 ...

Page 141: ...ft 3ft 0ft 3ft 13ft 9ft 7ft 3ft 0ft 13ft 10ft 10ft 7ft 7ft 3ft 0ft 3ft 13ft Air velocity ft s Temperature F 91 91 86 86 81 81 75 75 70 70 6 6 6 6 4 9 4 9 3 3 3 3 1 6 1 6 Air velocity ft s 9ft 7ft 3ft 0ft 13ft 10ft 10ft 7ft 7ft 3ft 0ft 3ft 13ft 9ft 7ft 3ft 0ft 13ft 10ft 10ft 7ft 7ft 3ft 0ft 3ft 13ft Temperature F 6 6 64 64 68 68 72 72 75 75 6 6 4 9 4 9 3 3 3 3 1 6 1 6 Discharge angle 40 Discharge a...

Page 142: ...perature Thermistor CN PIPE IN Evaporator Outlet Temperature Thermistor CN PIPE OUT Heat exchanger Gas pipe connection port flare connection Liquid pipe connection port flare connection Turbo fan Cooling Heating M Thermistor for Evaporator Inlet Temperature Thermistor for Indoor Air Temperature Thermistor for Evaporator Outlet Temperature FOUR WAY CEILING CASSETTE INDOOR UNITS Due to our policy of...

Page 143: ...LING CASSETTE INDOOR UNITS CEILING CASSETTE 143 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 MULTI FMAX MULTI F ...

Page 144: ...ll Flaring tool set Torque wrenches Hexagonal wrench Gas leak detector Thermometer Read all instructions before installing the product Installation work must be performed by authorized personnel and in accordance with the national wiring standards and all local codes 1 Wireless Handheld Controller for the four way ceiling cassette indoor units is also referenced by Model No PQWRHQ0FDB Table 80 Req...

Page 145: ...n To counter measure Change the indoor unit mode selection to allow for higher ceilings see table Install an air circulator Set the air discharge outlet so that heated air flows in a downward direction Use a dual door system to protect the building gate or exit Installing in an Area Exposed to Unconditioned Air In some installation applications areas floors walls in some rooms may be exposed to un...

Page 146: ...location for the indoor unit and then mark where the bolts refrigerant piping and drain hose should be Suspension bolt angle should account for drain direction 3 Drill holes for the bolts Use either a W 3 8 inch or a M10 size bolt 23 1 16inches 26inches CeilingOpening 20 3 8 inches 18 5 32 inches 20 3 8 inches 23 1 16 inches 26 inches Ceiling Opening 20 19 32 inches 22 15 32 i n ches Uni t Si z e ...

Page 147: ...in drain pump and float switch therefore the unit must be installed horizontally or condensate will drip out and cause product malfunction Measure the unit at each corner to verify that it is level 7 Remove the installation guide template Installation and Best Layout Practices FOUR WAY CEILING CASSETTE INDOOR UNITS Flat washer for M10 field supplied Flat washer for M10 field supplied Hanging bolt ...

Page 148: ...sed piping may generate condensate or will cause burns if touched Insulation for this field installed refrig erant piping must have a minimum heat resistance of 248 F Drain Piping Insulation Drain piping must have insulation a minimum of 7 32 inches thick Installing the Insulation 1 Overlap the insulation at the connection of the field installed piping and the indoor unit piping Tape together so t...

Page 149: ...o prevent foreign particles from entering the indoor unit Figure 207 Power Wiring and Communications Cable Connection Access Figure 208 Simplified View of Indoor Unit to Outdoor Unit Branch Distribution Unit Terminal Connections Installation and Best Layout Practices FOUR WAY CEILING CASSETTE INDOOR UNITS Ceiling cassette 4 way _ 19 Rubber Stopper Cable Conduit Screws Conduit Bracket Using a Condu...

Page 150: ...e operation begins 8 Sleep Timer Button Sets the sleep mode operation 9 Set Clear Button Sets or cancels the timer also sets the current time 10 Plasma Button Starts or stops plasma purification functions 11 Room Temperature Setting Button Raises or lowers temperature setpoint in cooling and heating operation 12 Operation mode selection button Selects the operation mode 13 Indoor Fan Speed Button ...

Page 151: ... wall itself 3 Arrange wiring cables so as not to interfere with the controller circuitry Position the wired controller on the wall plate Snap into place by pressing the bottom part of the wired controller onto the wall plate Make sure that no gaps exist between the wired controller and the wall plate on all sides 4 To remove wired controller from the wall plate insert a screw driver into the two ...

Page 152: ...install the filter and the air inlet grille on the front panel 9 Grille Corner Cover 1A 1B Indoor Unit Decoration panel Insulation should fit tightly so that cool air does not leak Ceiling Tile Decoration panel must be installed properly cool air will leak from any gaps found between the indoor unit frame and the decoration panel which will cause condensation to generate Finalizing Indoor Unit Ins...

Page 153: ...e on page 157 Heating Capacity Table on page 158 External Static Pressure on page 159 Acoustic Data on page 160 Refrigerant Flow Diagram on page 161 Wiring Diagram on page 162 Factory Supplied Parts and Materials on page 164 Installation and Best Layout Practices on page 165 VERTICAL HORIZONTAL AIR HANDLING INDOOR UNIT DATA ...

Page 154: ...er Fan Assembly and Control The units have an integral fan assembly consisting of galvanized steel housing and a forward curve fan wheel The fan motor is a brushless digitally controlled BLDC motor with permanently lubricated and sealed ball bearings The fan motor assembly is mounted on vibration attenuating rub ber grommets Fan speed is controlled using a micropro cessor based direct digital cont...

Page 155: ...ata 1 Nominal capacity is rated 0 ft above sea level with corresponding refrigerant piping length in accordance with standard length of each outdoor unit and a 0 ft level difference between outdoor and indoor units All capacities are net with a combination ratio between 95 105 Nominal cooling capacity rating obtained with air entering the indoor unit at 80ºF dry bulb DB and 67ºF wet bulb WB and ou...

Page 156: ...1 8 1 1 2 9 15 16 2 1 16 18 17 2 1 8 13 4 11 16 1 9 16 1 9 16 1 9 16 1 15 16 1 5 8 14 5 16 D 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 156 VERTICAL HORIZONTAL Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 157: ...85 18 10 23 69 18 43 25 70 18 88 27 13 19 35 105 19 49 16 93 20 92 18 07 22 35 17 66 23 38 18 14 25 20 18 47 26 63 18 94 110 18 99 16 35 20 42 17 49 21 85 17 12 22 88 17 60 24 70 17 94 26 13 18 42 115 18 49 15 86 19 92 17 00 21 35 16 66 22 38 17 15 24 20 17 51 25 63 18 00 118 18 19 15 75 19 62 16 89 21 05 16 58 22 08 17 07 23 90 17 46 25 33 17 96 122 18 10 15 71 19 52 16 86 20 95 16 55 21 98 17 05...

Page 158: ... 48 20 19 30 58 30 29 30 10 30 00 29 71 28 70 25 23 32 75 32 46 32 27 32 17 31 88 30 72 30 28 34 64 34 35 34 15 34 06 33 77 32 75 35 32 36 52 36 23 36 04 35 94 35 65 34 78 40 36 38 21 37 92 37 73 37 63 37 34 36 47 45 41 39 90 39 61 39 42 39 32 39 03 38 16 47 43 40 58 40 29 40 10 40 00 39 71 38 84 50 46 41 23 40 94 40 75 40 65 40 36 39 38 55 51 42 32 42 03 41 84 41 74 41 45 40 29 60 56 42 32 42 03 ...

Page 159: ...oor Unit Btu h Heater Capacity kW 5 10 15 20 LMVN240HV 24 000 480 CFM 480 CFM Not Available Not Available LMVN360HV 36 000 780 CFM 780 CFM Not Available Not Available Table 87 Multi F Vertical Horizontal Air Handling Unit Minimum Airflow by Heater Capacity Do not operate the air conditioning system using less than the minimum airflow There is risk of fire or product damage Heater Capacity kW Stati...

Page 160: ...nd Heating High Fan Speed Medium Fan Speed Low Fan Speed LMVN240HV 43 42 41 LMVN360HV 45 44 43 3 3 ft 3 3 ft With Case Microphone Octave Band Center Frequency Hz Octave Band Sound Pressure Level dB 20μPa 10 20 30 40 50 60 70 80 63 125 250 500 1000 2000 4000 8000 Approximate Hearing Threshold NC 15 NC 20 NC 25 NC 30 NC 35 NC 40 NC 45 NC 50 NC 55 NC 60 NC 65 Octave Band Sound Pressure Level dB 20μPa...

Page 161: ...re Thermistor CN ROOM Evaporator Inlet Temperature Thermistor CN PIPE IN Evaporator Outlet Temperature Thermistor CN PIPE OUT Gas pipe connection port flare connection Liquid pipe connection port flare connection Cooling Heating Thermistor for Evaporator Inlet Temperature Thermistor for Indoor Air Temperature Thermistor for Evaporator Outlet Temperature Heat Exchanger Cross Flow Fan M VERTICAL HOR...

Page 162: ...stor CN PIPE OUT Discharge pipe sensor Pipe out thermistor CN ROOM Room sensor Room thermistor CN REMO Remote controller Remote control line CN OPTION Option PCB Communication between main and option CN ZONE Zone controller Zone control line CN DISPLAY RF Remote controller RF Remote control line CN CC Dry contact Dry contact line Table 93 Wiring Diagram Connections Due to our policy of continuous ...

Page 163: ... with electric heater DIP switches 5 and 6 must be set to ON SW 5 ON Fan operates continuously Can have uninterrupted heating during defrost or oil return modes using continuous heater and fan operation SW5 OFF Fan discontinuous operation There would be reduction in heating capacity while defrosting or oil return operation SW6 ON Automatic heater operation Heater operates automatically using the h...

Page 164: ...ic field minimum 3 1 3 feet away Do not install the unit near a doorway The unit may be damaged may malfunction and or will not operate as designed if installed in any of the conditions listed Read all instructions before installing the product Installation work must be performed by authorized personnel and in accordance with the national wiring standards and all local codes Installing in an Area ...

Page 165: ...or Service 9 27 32 inches 13 25 32 inches 13 25 32 inches 9 27 32 inches Figure 225 Clearance Requirements Figure 226 General and Duct Connection Dimensions Table 95 General and Duct Connection Dimensions Refrigerant Piping Connections Drain Connections for Horizontal Install Filter Access Drain Connections for Vertical Install Access Holes for Conduit Access Holes for Conduit Figure 227 Location ...

Page 166: ...low minimum height clearance is 14 inches Plenum must be strong and secure enough to support the installation of adapter collars to accommo date duct work Air handler platform should be sturdy enough to support the frame plus any accessories i e filter box To prevent air leaks seal all duct work according to local codes but make sure that filter access is still unobstructed Vibration isolators fie...

Page 167: ...condary drain line is not used it must be capped Do not block the filter access panel when installing the condensate drain piping Prime the primary and secondary condensate traps after running both to the drain pan If the unit is installed above an inhabited space add a field supplied external condensate pan that runs underneath the entire frame to prevent damage from overflow The additional exter...

Page 168: ...exposed piping may gener ate condensate or will cause burns if touched Insulation for this field installed refrigerant piping must have a minimum heat resistance of 248 F Vertical horizontal air handling indoor units have been tested under and meet the requirements of the KS Conditions If the indoor unit is installed and is operated at an extended period in a highly humid environment dew point tem...

Page 169: ...cover from the control box 2 Knockout the access holes for the wiring Insert the power wiring communications cable from the outdoor unit or branch distribu tion unit Multi F MAX systems only through the conduits pass the conduits through the designated access holes and then in sert the conduits into the control box To prevent electromagnetic interference and product malfunction leave a space betwe...

Page 170: ... the vertical horizontal air handling indoor units are also referenced by Model No PQRCVCL0QW Each function will display on the LED for about three 3 seconds when the power is first cycled on Verify the connectors are properly inserted C BOX Cable Plug type Extension cable To Indoor Unit CN REMO Terminal TEMP FAN SPEED OPER MODE Figure 242 Wired Controller Connection on the Indoor Unit Terminal Bl...

Page 171: ... either alone or in conjunction with a wired controller thermistor as previously described 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 ap plicable side 2 Choose and mark the area of insta...

Page 172: ...ome 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 172 VERTICAL HORIZONTAL Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 173: ... Equipment Selection Procedure on page 174 Building Ventilation Design Guide on page 180 Placement Considerations on page 185 APPLICATION GUIDELINES ...

Page 174: ...ach other into thermal zones After combining like spaces into zones that will be served by a single or grouped indoor unit s calculate the peak cooling and heating loads for each zone Choosing the Appropriate Indoor Units Determine the appropriate indoor unit capacity that satisfies the given zone load calculations choose how many and which styles of indoor units will be required See Table 96 for ...

Page 175: ...ombined nominal ca pacity of the connected indoor units 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 t...

Page 176: ...d temperature datapoints 1 Median between two published Total Capacity TC Btu h datapoints in the capacity table 2 Median between two nearest published temperature datapoints EQUIPMENT SELECTION PROCEDURE Using the Indoor Unit Cooling and Heating Capacity Tables The datapoints shown in the indoor unit cooling and heating capacity charts are based on and convey an indoor unit operating with maxi mu...

Page 177: ...2 0 90 6 95 0 9 000 Btu h Indoor Unit Models 25 0 100 0 100 0 32 8 98 0 99 0 49 2 94 8 97 4 65 6 91 6 95 8 82 0 88 4 94 2 12 000 Btu h Indoor Unit Models 25 0 100 0 100 0 32 8 97 6 98 6 49 2 93 8 96 4 65 6 89 9 94 1 82 0 86 1 91 9 15 000 Btu h Indoor Unit Models 25 0 100 0 100 0 32 8 97 2 98 2 49 2 93 0 95 4 65 6 88 8 92 6 82 0 84 6 89 8 18 000 Btu h Indoor Unit Models 25 0 100 0 100 0 32 8 98 6 9...

Page 178: ...h feet Cooling Capacity Heating Capacity 7 000 Btu h Indoor Unit Models 16 4 100 0 100 0 32 8 98 0 99 5 49 2 96 0 98 9 9 000 Btu h Indoor Unit Models 16 4 100 0 100 0 32 8 97 5 98 8 49 2 95 0 97 5 12 000 Btu h Indoor Unit Models 16 4 100 0 100 0 32 8 97 0 98 3 49 2 94 0 96 5 15 000 Btu h Indoor Unit Models 16 4 100 0 100 0 32 8 97 2 98 2 49 2 93 0 95 4 18 000 Btu h Indoor Unit Models 16 4 100 0 10...

Page 179: ...the zone it serves For each indoor unit the corrected capacity must be at least equal to the total of the cooling design load plus ventilation load if applicable for the space s served by the indoor unit For each indoor unit the corrected capacity also must be at least equal to the total of the heating design load plus ventilation load if applicable for the space s and or thermal zones served by t...

Page 180: ...neers ASHRAE website at www ashrae org Method 1 Natural Ventilation Non Ducted Unconditioned Outdoor Air Natural ventilation devices such as operable windows or louvers may be used to ventilate the building when local code permits Advantages Occupants control the volume of the ventilation air manually Useful for historic buildings that have no ceiling space available for outdoor air ductwork May b...

Page 181: ...e warehouses garages and workshops Outdoor air volume is a known quantity Air loads may be easier to calculate since fans will regulate the amount of outdoor air May be used with the full lineup of Multi F indoor units This may result in loss of building pressurization control increasing infiltration loads with adverse effects Disadvantages In some locations of the country it may be difficult to c...

Page 182: ...the unit case In most cases in lieu of using the factory mounted return air thermistor on indoor units a remote wall temperature sensor or zone controller will be needed to provide an accurate reading of the conditioned area temperature Unconditioned outdoor air may affect indoor unit performance which may necessitate oversizing the indoor unit Outside air may flow backward through the return air ...

Page 183: ...n outside air duct Ceiling space is required for ductwork Failure of outdoor air may impact indoor unit operation In lieu of using the factory mounted return air thermistor a remote wall temperature sensor or zone controller may be required to provide an accurate conditioned space temperature reading Outside air may flow backward through the return air filter grille when the indoor unit fan speed ...

Page 184: ...erlocked with the Multi V F system In lieu of installing localized smaller outside air treatment equipment throughout the building this method centralizes the ventilation air source making service and filter changes easier and less disruptive for the building occupants Third party demand control ventilation controls are more readily accommodated Indoor unit operation and performance will not be af...

Page 185: ...s and electric wires audio and visual appliances breaker circuit panels etc If the frequency signal of the appliance is unstable then install the indoor unit a minimum of ten 10 feet away and run the power and transmission cables through a conduit An area that is level and with enough strength to bear the weight of the indoor unit s An area where operation sound won t disturb occupants An area tha...

Page 186: ...n case of high winds or where required by local codes Oceanside Installation Precautions Avoid installing the outdoor unit where it would be directly exposed to ocean winds Install the outdoor unit on the side of the building opposite from direct ocean winds Select a location with good drainage Periodically clean dust or salt particles off of the heat exchanger with water Additional anti corrosion...

Page 187: ...gravel The surface of the foundation should be finished with mortar with rounded edges and weatherproofed Figure 254 Bolting the Outdoor Unit to the Platform Minimum 7 7 8 7 7 8 15 3 4 Minimum 24 13 32 Unit Inch Outdoor Unit Type Bolt Type Concrete Height Bolt Depth LMU18CHV LMU24CHV LMU36CHV M10 J Minimum 3 15 16 inches Minimum 2 3 4 inches LMU540HV M10 J Minimum 7 7 8 inches Minimum 2 3 4 inches...

Page 188: ...Fence or obstacles Unit Inch Minimum 11 13 16 Ensure that the space at the back of the outdoor unit is a minimum of 11 13 16 inches and include a minimum of 23 5 8 inches at the right side of the unit for service If the outdoor unit discharge side faces a wall include a minimum of 19 11 16 inches between the outdoor unit and the wall Install the outdoor unit so that the discharge port is set at a ...

Page 189: ...11 13 16 Minimum 11 13 16 Minimum 23 19 32 Obstacle on the suction side only Obstacles on the suction side and on both left and right sides Minimum 19 11 16 Minimum 19 11 16 Minimum 19 11 16 Minimum 39 3 8 Obstacle just on the air discharge side Obstacles above and on the air discharge side Due to our policy of continuous product innovation some specifications may change without notification LG El...

Page 190: ... side obstacle is higher than the outdoor unit Maximum 19 11 16 Minimum 11 13 16 Minimum 39 3 8 L H A Minimum 19 11 16 Minimum 11 13 16 L Minimum 39 3 8 Minimum 39 3 8 Maximum 19 11 16 Minimum 11 13 16 Where there are obstacles on both suction and discharge sides discharge side obstacle is lower than the outdoor unit Where there are obstacles above and on both suction and discharge sides discharge...

Page 191: ...age 194 LG Engineered Multi F MAX Y Branch Kits on page 195 Refrigerant Charge on page 196 Selecting Field Supplied Copper Tubing on page 198 Refrigerant Piping System Layout on page 200 Piping Insulation on page 208 Condensate Drain Piping on page 209 Cut Sheet on page 211 REFRIGERANT PIPING DESIGN LAYOUT BEST PRACTICES ...

Page 192: ...C D LMU18CHV 10 82 82 164 LMU24CHV 10 82 82 82 246 1 LMU36CHV 10 82 82 82 82 246 1 1 Kit contains two Y branches one for liquid and one for vapor Table 107 Multi F Outdoor Unit Refrigerant Piping System Limitations Component Size Inches 1 4 3 8 1 2 5 8 3 4 Elbow ft 0 5 0 6 0 7 0 8 1 2 Y Branch Kit ft Multi F MAX systems only 1 1 6 Branch Distribution Unit ft Multi F MAX systems only 8 2 Field supp...

Page 193: ...ts h2 42 9 feet Between branch distribution unit and farthest connected indoor unit s h3 32 8 feet Between branch distribution units h4 42 9 feet Table 109 Multi F MAX Piping Sizes Piping Main Pipe A inch Branch Pipe B Liquid Ø3 8 Depends on the size of the indoor unit piping Gas Ø3 4 Example LMU540HV outdoor unit with four 4 indoor units and one 1 branch distribution unit connected ODU Outdoor Un...

Page 194: ...he route for interconnecting piping Draw a one line depiction of the pipe route chosen on the building drawing 4 Calculate the actual length of each pipe segment and note it on the building drawing 5 Using the data obtained while selecting the system components list the corrected cooling capacity next to each indoor unit on the drawing 6 Starting at the indoor unit located farthest from the outdoo...

Page 195: ...ered into LATS piping design software Figure 257 Y Branch Connections Figure 258 Y Branch Dimensions Diagram Figure 259 Horizontal Configuration End View Multi F MAX Y Branch Kit PMBL5620 Table 110 Y Branch Connection Diameters Model Y Branch Type Port Identifier inch Dimensions 1 2 3 X Y PMBL5620 Liquid 3 8 3 8 3 8 13 80 3 24 Vapor 3 4 3 4 3 4 12 48 3 02 To Branch Distribution Unit Ø3 4 Ø3 4 To O...

Page 196: ...Length per Branch L ft Additional Charge Needed a oz ft LMU18CHV 10 to 82 164 24 6 0 22 LMU24CHV 10 to 82 246 1 24 6 0 22 LMU36CHV 10 to 82 246 1 24 6 0 22 Outdoor Unit Factory Charge lbs of R410A LMU18CHV 3 96 LMU24CHV 3 96 LMU36CHV 6 18 LMU540HV 9 7 Table 111 Outdoor Unit Factory Charge Multi F Systems Number of installed length of branches depends on the specifications of the outdoor unit model...

Page 197: ...CF Correction Factor x 3 53 Number of installed length of branches depends on system specifications CF Maximum number of connectable indoor units Total number of connected indoor units Figure 263 Multi F MAX Additional Refrigerant Charge Example B3 18 000 9 000 9 000 LMU540HV Total main pipe A 60 ft Each branch pipe B1 B2 B3 B4 B5 Additional Charge 60 16 4 x 0 54 49 16 4 x 0 22 17 16 4 x 0 22 17 1...

Page 198: ...expansion and contraction Each segment of pipe has a natural fixed point where no movement occurs This fixed point is located at the center point of the segment assuming the entire pipe is insulated in a similar fashion The natural fixed point of the pipe segment is typically where the expansion Loop or U bend should be Linear pipe expansion can be calculated using the following formula 1 From Tab...

Page 199: ... 1 52 1 60 1 68 1 76 1 73 1 84 2 08 2 24 2 32 2 40 180 0 72 0 72 0 90 1 08 1 17 1 26 1 35 1 44 1 53 1 62 1 71 1 80 1 89 1 98 1 94 2 07 2 34 2 52 2 61 2 70 1 Pipe length baseline temperature 0 F Expansion of Carbon Copper and Stainless Steel Pipe The Engineers Toolbox www engineeringtoolbox com Table 116 Linear Thermal Expansion of Copper Tubing in Inches Selecting Field Supplied Copper Tubing INST...

Page 200: ... Piping Above and Below an Obstacle Above an obstacle 3X Minimum Below an obstacle Obstacles When an obstacle such as an I beam or concrete T is in the path of the planned refrigerant pipe run it is best practice to route the pipe over the obstacle If adequate space is not available to route the insulated pipe over the obstacle then route the pipe under the obstacle In either case it is imperative...

Page 201: ...ipe insulation Place a second layer of insulation over the pipe insulation jacket to prevent chafing and compression of the primary insulation within the confines of the support pipe clamp A properly installed pipe system will have sufficient supports to avoid pipes from sag ging during the life of the system As necessary place supports closer for segments where potential sagging could occur Maxim...

Page 202: ...g Refrigerant Pipe Insulated Support Band Insulated Support Band Down Stop Welding Plate Nut Hexagonal Nut O ring Band Support at Intervals Between 5 and 6 3 4 Feet Figure 273 Saddle Type Support Figure 274 U Bolt Support with an Insulated Pipe Figure 275 O Ring Band Support with an Insulated Pipe Figure 276 One Point Down Stop Support 441 lbs Figure 277 Two Point Down Stop Support Due to our poli...

Page 203: ...frigerant Piping Refrigerant pipe installed underground should be routed inside a vapor tight protective sleeve to prevent insulation deterioration and water infiltration Refrigerant pipe installed inside underground casing must be continuous without any joints Underground refriger ant pipe must be located at a level below the frost line Figure 279 Typical Arrangement of Refrigerant Pipe and Cable...

Page 204: ...8 000 Btu h Ø1 2 24 000 Btu h 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 INSTALLATION LAYOUT BEST PRACTICES Refrigerant Piping System Layout Multi F Outdoor Unit to Indoor Unit Piping Connections Outdoor Unit Piping Connections LMU18CHV LMU24CHV LMU36CHV Li...

Page 205: ...OD x Qty Ø3 4 x 1 Piping Connections to Indoor Units Liquid in OD x Qty Ø1 4 x 2 Ø1 4 x 3 Ø1 4 x 4 Ø1 4 x 3 Ø3 8 x 1 Vapor in OD x Qty Ø3 8 x 2 Ø3 8 x 3 Ø3 8 x 4 Ø3 8 x 3 Ø5 8 x 1 Table 126 Connection Socket Dimensions Connection sockets included as a factory supplied accessory with the indoor units may need to be used when piping the indoor units to the branch distribution unit Connection Socket ...

Page 206: ...nch distribution unit or ODU Flare side to branch distribution unit or ODU Multi F System Piping Connections Figure 286 Possible Outdoor Unit or Branch Distribution Unit to Indoor Unit Connections 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...

Page 207: ...ON LAYOUT BEST PRACTICES Refrigerant Piping System Layout Flare Connection Practices 1 Place a couple of drops of refrigerant oil on the opening rim of the flare before assembling Take care not to add any contaminants 2 Align the center of the refrigerant pipe and corresponding connection and tighten the flare nut by hand 3 Following the guidelines as outlined in Table 125 for the amount of torque...

Page 208: ...ends of all unused header ports Peel the adhesive glue protector slip from the insulation jacket and install the clam shell jacket over the fitting Minimum Refrigerant Pipe Ethylene Propylene Diene Methylene EPDM Insulation Wall Thickness Requirements Follow locals codes when selecting EPDM insulation wall thickness Table 129 Insulation Guidelines for Typical and Special Circumstances Classificati...

Page 209: ...erant piping power wiring communication cables and drain piping is properly supported with anchor bolts and clamp hangers positioned at 3 3 to 4 9 foot intervals Flexible hose Drain pump PVC elbow PVC PVC 1 50 1 100 slope Max 27 1 2 in 11 13 16 in Metal clamp Drain pan Insulation Flexible drain hose Insulation Figure 291 Diagram of an Indoor Unit with a Gravity Drain Figure 292 Diagram of an Indoo...

Page 210: ...m entering the system 45 to 60 Angle 45 to 60 Angle 45 to 60 angle for protection against overflow Common vertical drain pipe It is recommended that a dedicated drain pipe be installed for the air conditioning sys tem If the indoor unit drainage system is shared with a rainwater drain waste water or any other type of building drain system back flow leaks ice may form or noxious odors may be presen...

Page 211: ...ctions in the appli cable 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 132 Multi F MAX Y Branch Connection Diameters Material Copper Design Pressure 551 psig Table 133 Insulation Jacket Properties A B X Y 1 2 3 A To Outdoor Unit B To ...

Page 212: ... 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 212 DESIGN PRACTICES Multi F and Multi F MAX Indoor Unit Engineering Manual MULTI FMAX MULTI F ...

Page 213: ... General Information on page 214 Power Wiring 208 230V and Communications Cable Details on page 217 Indoor Unit Group Control on page 222 WIRING CONNECTIONS ...

Page 214: ... is wired to the outdoor unit only The outdoor unit will supply power to the branch distribu tion units Multi F MAX systems only and the indoor units through the power wiring communications cable Figure 300 Power Wiring to Multi F and Multi F MAX ODU Electrical Specifications 1 Multi F and Multi F MAX Outdoor Units 1Ø 208 230V 60Hz 2 Indoor units Branch Distribution Units Multi F MAX systems only ...

Page 215: ...t external forces from being imparted on the terminal block Use an appropriately sized screwdriver for tightening the terminals Do not overtighten the connections overtightening may damage the terminals Figure 304 Proper and Improper Power Wiring Connections General Information There is a risk of fire electric shock physical harm or injury or death if the power wires are not properly terminated an...

Page 216: ... BD Unit BD Unit Ground Wiring Outdoor Unit Outdoor Unit Indoor Units Power Supply Circuit Breaker Ground Wiring Figure 305 Multi F System General Power Communications System Schematic Figure 306 Multi F MAX System General Power Communications System Schematic General Information WIRING CONNECTIONS Due to our policy of continuous product innovation some specifications may change without notificati...

Page 217: ...tween the panel and the conduits Clamp is included near the terminal block to help protect the connections from strain on the cables Always have a trained technician properly ground the outdoor unit If the outdoor unit is not properly grounded there is a risk of electric shock Use a conduit for the power wiring The communications cable should be separated and isolated from the outdoor unit power w...

Page 218: ...ng is required to prevent accidental electrical shock during current leakage communication problems from electrical noise and motor current leakage Do not connect the ground line to the pipes Install a main shutoff switch or circuit breaker that interrupts all power sources simultaneously Wiring cable size must comply with applicable national state and local codes Power Wiring 208 230V and Communi...

Page 219: ... 230V and Communications Cable Details Figure 309 Multi F LMU24CHV System Power Wiring and Communications Cable Outdoor Unit L1 L2 1 L1 2 L2 2 L2 3 A 3 C 3 B 1 L1 Outdoor Unit Terminal Block L1 L1 L2 L2 G Power Supply Main Switch Circuit Breaker Fuse Three wire Power Wiring Including Ground COMMUNICATIONS CABLE POWER WIRING 1 L1 2 L2 Indoor Unit Terminal Block Unit A Unit B Unit C 3 1 L1 2 L2 3 1 ...

Page 220: ...ments Use only stranded shielded copper conductor Ground wiring is required to prevent accidental electrical shock during current leakage communication problems from electrical noise and motor current leakage Do not connect the ground line to the pipes Install a main shutoff switch or circuit breaker that interrupts all power sources simultaneously Wiring cable size must comply with applicable nat...

Page 221: ...Communications Cable All field supplied wiring components and materials should follow national state and local codes and requirements Use only stranded shielded copper conductor Ground wiring is required to prevent accidental electrical shock during current leakage communication problems from electrical noise and motor current leakage Do not connect the ground line to the pipes Install a main shut...

Page 222: ...r 3 NEVER splice cut or extend cable length with field provided cable 4 A maximum of 16 indoor units can be connected to a wired remote controller maximum wire length 164 feet Before running cable decide which indoor unit will be the Master set the remaining as Slave The zone controller will be connected to the Master 5 Identify each indoor unit operating as a group as Master or Slave Adjust the p...

Page 223: ...ecibels with A frequency weighting OUCF Outdoor Unit Correction Factor DDOAS Decoupled Dedicated Outdoor Air PDI Power Distribution Indicator DFS Duct Free Split PI Power Input DI Digital Input PTAC Packaged Terminal Air Conditioner DO Digital Output PVE Polyvinyl Ether EEV Electronic Expansion Valve RAT Return Air Temperature ELF Equivalent Length in Feet RCL Refrigerant Concentration Limit EPDM ...

Page 224: ... 30009 www lghvac com EM MultiFIDU 01 15 Supersedes EM MultiFIDU 06 14 Supersedes DFS EM AJ 002 US 014A03 Supersedes DFS EM AJ 002 US 013M09 Supersedes DFS EM AJ 002 US 013K30 20001747 ISO 9001 2008 LG ELECTRONICS INC LG Electronics Products Support 1 888 865 3026 USA Follow the prompts for HVAC products ...

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