Page 1 MULTI MULTI OUTDOOR UNIT INSTALLATION MANUAL Multi-Zone Heat Pump Systems 1.5 to 5 Tons Dual and Tri-Zone Quad-Zone Eight-Zone Multi F Multi F Multi F MAX...
Page 2 For more technical materials such as submittals, catalogs, engineering, owner’s, best practices, building ventilation guide, and service manuals, visit www.lghvac.com. For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice. © LG Electronics U.S.A., Inc.
Page 3: Table Of Contents
Maintenance Recommendations ....................................97 Installation Checklists and Worksheets ................................98-103 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 4: Safety Instructions
There is a risk of explosion, physical injury, or death. 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 5 There is a risk of product failure. 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 6 / or property damage. 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 7 Strong cleaning products will damage the surface of the air conditioner, or will cause its appearance to deteriorate. 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 8: Nomenclature
• Compatible single zone IDU nomenclature is listed in the Single Zone Wall-Mounted IDU Engineering Manual. 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 9: General Data
Sound pressure levels are tested in an anechoic chamber under ISO Standard 3745 and 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 10 - 36,000 ODU (LMU36CHV): 12,000 IDU x 4 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 11 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 12 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 13 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 14 These values can increase due to ambient conditions during operation. 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 15 Indoor Fan Motor (FLA) is based on the maximum combina- tion of 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.
Page 16 Supporter 14-1/20 Unit: inch 37-13/32 Center of Gravity 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 17 Branch distribution Unit can accommodate from one (1) indoor unit up to four (4) indoor units depending on the ports available on the branch distribution Unit. Communication / power (connection) cable must be a minimum of 14 AWG, 4-conductor from the outdoor unit to the branch distribution unit (Multi F MAX systems only), and 14 AWG, 4-conductor from the branch distribution unit to the indoor unit, stranded, shielded or unshielded (if shielded, it must be grounded to the chassis of the outdoor unit only), and must comply with applicable local and national codes.
Page 18 3. For PMBD3640 and PMBD3641 Units, Ports A, B, C, and D are Available. 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 19 • When lifting, always include padding to protect the outdoor unit from rope damage. 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 20: Placement Considerations
• A location that allows for optimum air flow and is easily accessible for inspection, maintenance, and service. • Where piping between the outdoor unit and indoor unit (and branch distribution unit[s], if Multi F MAX) is within allowable limits.
Page 21 If the building does not include lightning protection, the outdoor unit will be damaged from a lightning strike. Inform the customer of this possibility in advance. Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 22 Obstacles on the suction side and on both left and right sides. 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 23 Obstacle just on the air discharge side. air discharge side. 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 24 Minimum 24" Minimum 40" 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 25 • Maintains coil heat transfer efficiency by reducing the number of and shortening the cycle time for defrost operation. • Easier maintenance and servicing during inclement weather. • When mounted in a fully enclosed space, limiting the ambient air temperature will allow the Multi F / Multi F MAX system designer to elimi- nate oversizing.
Page 26 4. If the louver open rate is too small or there is insufficient air flow exchange, the air conditioner might stop operating. 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 27 /min. / 2,119 ft. /min. = 291% (Within Allowable Limits) 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 28 Select a location for installing the indoor units that will meet the following conditions: • Within allowable parameters for proper connection to the outdoor unit (and branch distribution unit, if a Multi F MAX system). • So that condensation drainage can be conveniently routed away.
Page 29 3. For PMBD3640 and PMBD3641 Units, Ports A, B, C, and D are Available. 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 30 Figure 16: LMU480HV, LMU540HV, LMU600HV Outdoor Units. Unit: Inch 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 31: Mounting / Anchoring
Bolt Branch Distribution Unit Orientation Multi F MAX branch distribution (BD) units can be installed in a multitude of options to fit various building This material is for informational configurations and job or application requirements (suspended from the ceiling or mounted on the wall).
Page 32 Bottom of Unit Bott Bottom View, Port End Facing Up 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 33: Lg Air Conditioner Technical Solution (Lats)
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 on all projects.
Page 34 LATS can generate an Excel GERP report that can imported into the LG SOPS pricing and ordering system.
Page 35 LMU600HV = 8 One of the most critical elements of Multi F and Multi F MAX systems is the refrigerant piping. See below and the following pages for pipe length limits that must be followed in the design of Multi F and Multi F MAX refrigerant pipe systems.
Page 36 Branch Distribution Unit (ft., Multi F MAX systems only) 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 37: Selecting Copper Piping
Always follow local codes when selecting and installing copper pipe and piping system components. Approved piping for use with LG HVAC products will be marked “R410 RATED” along the length of the pipe. Piping wall thickness must meet local code requirements and be approved for a maximum operating pressure of 551 psi. When bending piping, try to keep the number of bends to a minimum, and use the largest radii possible to reduce the equivalent length of installed piping;...
Page 38: Copper Expansion And Contraction
ASTM B-88 Inches to feet conversion (12 in./ft.) Standards. 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 39 2.00 2.00 2.50 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.40 5.75 6.50 7.00 7.25 7.50 www.engineeringtoolbox.com. 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 40 R = Centerline Length of Pipe. L = Centerline Minimum Radius (inches). 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 41: Piping Handling
1 hour. 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 42: Refrigerant System Engineering
Failure to do so will cause significant performance degradation. Proper leak checks must be performed. Using isolation valves does not automatically void any LG product warranty, however, a limited warranty will be voided in whole or part must any field supplied accessory fail in any way that causes product failure.
Page 43 ~12" – 19" Max. 12" Maximum 12" Max. 12" 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 44 Support Band Down Stop Hexagonal Nut Refrigerant Pipe 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 45 Pipe Sleeves at Penetrations LG recommends that all pipe penetrations through walls, floors, and pipes buried underground be properly insulated and routed through an appropriate wall sleeve of sufficient size to prevent compression of refrigerant pipe insulation and promote free movement of the pipe within the sleeve.
Page 46: Flaring And Brazing Procedures
MULTI Flaring and Brazing Procedures One of the main causes of refrigerant leaks is a defective connection. For LG HVAC systems, the installer needs to know how perform both flared and brazed connections successfully. • During installation, it is imperative to keep the piping system free of contaminants and debris such as copper burrs, slag, or carbon dust.
Page 47: Refrigerant Piping Insulation
• Protect isolation valves, electronic expansion valves, and other heat-sensitive control components from excessive heat with a wet rag or heat barrier spray. 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 48 18,000 Btu/h: Low Static Duct, Four-Way Cassette 24,000 Btu/h 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 49 Flare Flare Outdoor Indoor Unit Unit Connection Socket 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 50 INSTALLING MULTI F MAX SYSTEMS MULTI For Multi F MAX outdoor units, piping can be installed in one of four directions: front, side, back, and down (A). If the downward installation is chosen, the knockout hole in the base pan must be accessed (B).
Page 51 18,000 Btu/h: Low Static Duct, Four-Way Cassette 24,000 Btu/h 36,000 Btu/h 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 52 4. After all the piping has been connected and the caps have been tightened, check for refrigerant gas leaks. 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 53 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 54 Viewed from A in direction of arrow Within ± 3° Within ± 3° 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 55 5. Seal any openings in the wall that are around the piping. 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 56 A leak test must be performed 24 hours after the drainage system has been installed. to the indoor unit type. 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 57 Y-branch fitting and all run-out pipes are installed. 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 58 The air conditioner factory insulation has been tested according to “ISO Conditions with Mist,” and it satisfies the requirements. If the system 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 59 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 60 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 61 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 62 • ARE ground terminals. • • Always create a wiring diagram that contains the exact sequence in which all the indoor units and branch distribution units (Multi F MAX systems only) are wired in relation to the outdoor unit. •...
Page 63 Electrical interference my cause product malfunction. 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 64 (1[L1]) and Neutral (2[L2]) Cable at Least Two (2) Inches for Each Indoor Unit Outdoor and Indoor Unit appearances may vary depending on the model. Figure 81: Schematic of a Multi F MAX System When the Wiring is GREATER THAN 130 Feet. At Least Two (2) Inches...
Page 65 • Maintain polarity throughout the communication network. The system will malfunction if not properly wired. 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 66 • Maintain polarity throughout the communication network. The system will malfunction if not properly wired. 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 67 • Maintain polarity throughout the communication network. The system will malfunction if not properly wired. 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 68 • Maintain polarity throughout the communication network. The system will malfunction if not properly wired. 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 69 • Maintain polarity throughout the communication network. The system will malfunction if not properly wired. 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 70 • All wiring / cable must be firmly connected to its terminals. Loose wiring will result in unit malfunction. 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 71 3(A) 3(B) To BD Units A and B 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 72 Always refer to the circuit diagram on the inside of the outdoor unit control cover. 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 73 Figure 92: PI-485 Board (Ap- pearance will differ depending on PI-485 V-net Control Integration Board for Outdoor Units adapt Multi F / Multi F MAX systems to a LG model). VRF system central protocol for integration with LG central controllers. The PI-485 is installed in the Multi F / Multi F MAX outdoor unit.
Page 74 ELECTRICAL From Indoor Units to Remote Controllers • Communication cable from indoor unit to remote controller(s) is to be LG supplied or field supplied 22 AWG, 3-conductor, twisted, stranded, unshielded. Wiring must comply with all applicable local and national codes.
Page 75 • Selection of operation options (operation/mode/set temperature) • Control of air flow rate (High/Medium/Low) 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 76: Final Installation Procedures
After the refrigerant piping installation is complete, perform a triple leak / pressure test. Triple leak / pressure test is performed between the outdoor unit and indoor units (and branch distribution units [Multi F MAX only]) to verify that refrigerant can flow through the system without danger of leaks or pressure losses.
Page 77 Schrader ports on the outdoor unit service ports. The triple evacuation procedure seen on page 78 is a best practices recommendation for Multi F systems, but mandatory for Multi F MAX systems. For faster evacuation, the Schrader core can be removed, and an auxiliary service port can used. Make sure to re-install the original Schrader core before operating the system.
Page 78 MAX systems. The deep evacuation procedure is insufficient to fully evacuate the extensive piping systems on Multi F MAX products. Triple evacuation must be performed through the Schrader ports on the outdoor unit service ports. The triple evacuation procedure is a best practices recommendation for Multi F systems, but mandatory for Multi F MAX systems.
Page 79 13. Shut the valves before turning off and disconnecting the vacuum pump. 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 80 FINAL INSTALLATION PROCEDURES MULTI LG Multi F and Multi F MAX outdoor units ship from the factory with a charge of Table 34: Outdoor Unit Factory Charge. R410A refrigerant. A trim charge will need to be added to take into account addition-...
Page 81 – (8 - 5) x 3.53 9,000 18,000 = 20.43 oz. 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 82: Refrigerant Charge
Check Valve Refrigerant Cylinder Vacuum Gauge (One) OPEN 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 83 ASHRAE Standard 15 / 34 and addenda current as of the date of this publication. 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 84 See also the LG HVAC Building Ventilation Guide on www.lghvac.com. 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 85: Test Run
1. Operate the system in cooling mode for 15 to 20 minutes. 2. Evaluate performance as the system runs, verifying the outdoor unit, and all indoor units and branch distribution units (Multi F MAX sys- tems only) are working properly. Make notes as needed to address any issues that might be found.
Page 86 Reducing Power Consumption (Step 2) with Mode Lock (Heating) 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 87 • Only the first four DIP switches are functional on the LMU480, 540, 600HV. 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 88 • Only the first four DIP switches are functional on the LMU480, 540, 600HV. 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 89 • Only the first four DIP switches are functional on the LMU480, 540, 600HV. 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 90 Ten (10) Times DC Link Voltage 230V “dc” “230” 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 91 Indoor unit EEPROM error Indoor unit BLDC motor fan lock 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 92 Outdoor unit brushless direct current (BLDC) fan motor lock error Outdoor unit PFC overcurrent (peak) error 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 93: Lg Monitoring View (Lgmv) Diagnostic Software
• Average indoor unit (IDU) pipe temperature • Inverter compressor operation indicator light 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 94 • Information displayed also depends on which unit is installed. 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 95: Lg Smart Inverter Monitoring System (Sims)
Help Menu (File is Factory Use Only) 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 96 • Information displayed also depends on which unit is installed. 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 97: Maintenance Recommendations
It is also recommended to monitor system operation using LGMV and / or SIMS Software at least once a year. 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 98 All literature and bagged accessories have been removed from the fan discharge (ducted and cassette model indoor units). All indoor units and branch distribution unit(s) (Multi F MAX only) are installed, properly supported, and located indoors in a non-corrosive environment.
Page 99 The power supplied was clean with voltage fluctuations within specifications (±10% of nameplate). Power wiring to the Multi F / Multi F MAX outdoor unit was field supplied, solid or stranded, and installed per all local, state, and NEC requirements.
Page 100 Major Component Rough-In Piping and Insulation Brazing Practices Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 101 Installation—Branch Distribution Unit (Multi F MAX Systems Only) Installation—Power Wire and Communications Cables 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 102 - ________CF x 5.29 - (________) = ________ Additional Charge (oz.) 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 103 - ________CF x 3.53 - (________) = ________ Additional Charge (oz.) 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 104 20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. IM_MultiF_ODU_04_20 Air Conditioning Technologies Supersedes: IM_MultiF_ODU_03_17 4300 North Point Parkway IM_MultiF_ODU_11_16 Alpharetta, Georgia 30022 IM_MultiF_ODU_4_16 www.lghvac.com IM_MultiF_ODU_11_15...
Page 105 MULTI MULTI OUTDOOR UNIT INSTALLATION MANUAL Multi-Zone Heat Pump Systems 1.5 to 5 Tons Dual and Tri-Zone Quad-Zone Eight-Zone Multi F Multi F Multi F MAX...
Page 106 4. For more materials such as submittals, catalogs, engineering, installation, owner’s, and service manuals, visit www.lghvac.com. For continual product development, LG Electronics U.S.A., Inc. reserves the right to change specifications without notice. © LG Electronics U.S.A., Inc.
Page 107 Periodically check that the outdoor frame is not damaged. 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 108 There is a risk of product failure. 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 109 System may malfunction. 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 110 Do not open the inlet during operation. There is risk of unit failure. 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 111 Caution for Refrigerant Leakage .................................... 72-73 Installation Checklists ......................................74-79 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 112 For performance data, see "Multi F / Multi F MAX Performance Data Manual" on www.lg-dfs.com. cooling mode. 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 113 (WB) and outdoor ambient conditions of 95ºF dry bulb (DB) and 75ºF wet bulb (WB). the BD unit (Multi F MAX systems only), and 18 AWG from the BD unit to the indoor unit, Rated heating capacity obtained with air entering the indoor unit at 70ºF dry bulb (DB) and 60ºF stranded, shielded or unshielded (if shielded, it must be grounded to the chassis of the wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB).
Page 114 Branch Distribution Unit can accommodate from one (1) indoor unit up to four (4) indoor units depending on the ports available on the Branch Distribution Unit. All power wiring / communication cable to be minimum 16 AWG from the outdoor unit to the BD unit (Multi F MAX systems only), and 18 AWG from the BD unit to the indoor unit, stranded, shielded or unshielded (if shielded, it must be grounded to the chassis of the outdoor unit only), and must comply with applicable local and national codes.
Page 115: Electrical Data
Indoor Fan Motor (FLA) is based on the maximum combina- tion of 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.
Page 116: R410A Refrigerant
551 psi design pressure of R410A. Inadequate piping may fail when pressurized. 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 117: General Installation Guidelines
• A location that allows for optimum air flow and is easily accessible for inspection, maintenance, and service. • Where piping between the outdoor unit, indoor unit(s), and BD units (Multi F MAX systems only) are within allowable limits. • Include space for drainage to ensure condensate flows properly out of the unit when it is in heating mode. Avoid placing the outdoor unit in a low-lying area where water could accumulate.
Page 118: Rooftop Installations
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 119 Obstacles on the suction side and on both left and right sides. 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 Obstacle just on the air discharge side. air discharge side. 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 121 Minimum 24" Minimum 40" 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 122 Figure 3: Close up of Bolt Attachment. Anchor Bolt 13/16 Unit: Inch 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 123 6. Seal all wiring and piping access holes to prevent bugs from entering the Bolt Bolt unit. 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 124 Selecting the Best Location for the Branch Distribution (BD) Unit Branch Distribution (BD) units are used only with Multi F MAX systems to distribute the refrigerant from the outdoor unit to up to eight indoor units. Select location indoors that will meet the following conditions: •...
Page 125 Figure 9: PMBD3620, PMBD3630, PMBD3640, and PMBD3641 External Dimensions. 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 126 Into the Ceiling Into the Ceiling Into the Ceiling 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 127 Bottom of Unit Bott Bottom View, Port End Facing Up 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 128: Piping Preparation
Ø5/8 0.06 ~ 0.07 Ø3/4 0.07 ~ 0.08 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 129 Align the center of the piping, and initially hand tighten the flare nuts using three (3) or four (4) turns. For Multi F Outdoor Units, install the flare nuts by: 1.
Page 130: Piping Materials And Handling
Contaminants can result in mechanical failure of the system. All joints are brazed in the field. Multi F / Multi F MAX refrigeration system components contain very small capillary tubes, small orifices, electronic expansion valves, oil separators, and heat exchangers that can easily become blocked. Proper system operation depends on the installer using best practices and utmost care while assembling the piping system.
Page 131 Selecting Field-Supplied Copper Tubing Type ACR copper is the only approved refrigerant pipe material for use with LG Multi F air conditioning products. ACR rated tubing is the only type that ships with yellow caps. Approved tubing for use with Multi F products will be marked “R410 RATED” along the length of the tube.
Page 132 Viewed from A in direction of arrow Within ± 3° Within ± 3° 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 133 No Pipe Size Substitutions Use only the pipe size selected by the LATS Multi F pipe system design software or as conveyed in the product installation instructions. Using a different size is prohibited and may result in a system malfunction or failure to work at all.
Page 134 ASTM B-88 Standards. Inches to feet conversion (12 in./ft.) 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 135 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 136 Components such as oil traps, solenoid valves, filter-dryers, sight glasses, tee fittings, and other after-market accessories are not permitted on the refrigerant piping system between the outdoor units and the indoor / branch distribution units. Multi F and Multi F MAX systems are provided with redundant systems that assure oil is properly returned to the compressor.
Page 137 A + B ~ 12" – 19" Max. 12" 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 138 Support Band Down Stop Hexagonal Nut Refrigerant Pipe 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 139: Refrigerant Piping Connections
Piping Length and Elevation Limitations One of the most critical elements of Multi F and Multi F MAX systems is the refrigerant piping. The tables on the next few pages list pipe length limits that must be followed in the design of Multi F and Multi F MAX refrigerant pipe systems.
Page 140 ≤ 49.2 feet h1 ≤ 98.4 feet 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 141 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 142 Duct, Four-Way Cassette Connection Socket 24,000 Btu/h 36,000 Btu/h 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 143 17 for information in reference to outdoor unit placement and condensate drainage. 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 144 Configuration Configuration Within ± 3° Within ± 3° 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 145: Flushing The Refrigerant Piping
(follow steps 3, 4, 5, and 6). 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 146: Leak Test And Vacuum Procedures
Leak Test and Vacuum Procedures Before performing the test run, Multi F and Multi F MAX refrigerant piping and the piping connections to the outdoor unit, the indoor units, and the BD units (Multi F MAX systems only) must be evacuated to remove any non-condensible gases and moisture that may be present in the system, and checked for leaks.
Page 147 0.0 (0.0) (Time) 24 hours 5 minutes 3 minutes 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 148 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 149: Refrigerant Charge
MULTI Refrigerant Charge LG Multi F and Multi F MAX outdoor units ship from the factory with a charge of Table 34: Outdoor Unit Factory Charge. R410A refrigerant. A trim charge may need to be added to take into account...
Page 150 – (8 - 5) x 3.53 9,000 18,000 = 20.43 oz. 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 151 Check Valve Refrigerant Cylinder Vacuum Gauge (One) OPEN 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 152: Refrigerant Piping Insulation
Refrigerant Piping System Insulation All refrigerant piping from the outdoor unit to the indoor units / BD units (Multi F MAX systems only) must be insulated correctly for safety and usage. Y-branch connections, refrigerant piping, field-provided isolation ball valves (if present), service valves, and elbows must be properly and completely insulated using closed cell pipe insulation (up to the indoor unit piping connections).
Page 153 Vinyl cover should not be used. 40 in 40 in 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 154 BD unit (Multi F MAX systems only). 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 155 5. Seal any openings in the wall. Trap 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 156 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 157 LMU480HV, LMU540HV 1Ø,208-230V LMU600HV 1Ø,208-230V 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 158 General Information General Communication Cable Specifications • Multi F Systems: All power wiring / communication cable to be minimum 18 AWG from the Figure 72: Multi F / Multi F MAX Outdoor and Indoor / Branch Distribution Unit Wiring and outdoor unit to the indoor unit, stranded, shielded or unshielded (if shielded, it must be Communications Cable Diagram.
Page 159: Power Wiring And Communications Cable Connections
3. Draw the power wiring to the outdoor unit, and the power wiring / communications cable (connecting cable) to the indoor units or BD unit (Multi F MAX systems only), through field-supplied conduits. Ensure there is enough length to connect the wiring / cables to the terminals on the outdoor unit.
Page 160 These wiring / cables should have separate conduits that are placed a reasonable distance apart. Communi- cation problems can arise from electrical noise. 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 161 3(A) 3(B) To BD Units A and B 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 162 3. Provide strain relief by securing the wiring / cable to the indoor unit with the factory-supplied clamps. 4. For more installation information for specific indoor units, refer to the separate indoor unit installation manuals on www.lg-dfs.com. Distributor (BD) Unit (Multi F MAX Systems Only)
Page 163 PI485 ance may differ depending on PI485 V-net Control Integration Board for Outdoor Units adapt Multi F, Multi F MAX systems to a LG VRF model). system central protocol for integration with LG central controllers. The PI485 is installed in the Multi F / Multi F MAX outdoor unit.
Page 164: Test Run
1. Start up the system and perform a test run. Operate the system in cooling mode for 15 to 20 minutes. 2. Evaluate performance as the system runs, verifying the outdoor unit and all indoor units and BD units (Multi F MAX systems only) are working properly.
Page 165: Dip Switch Settings
Reducing Power Consumption (Step 2) with Mode Lock (Heating) 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 166 • Turn DIP Switch 1 to OFF after finishing (Normal Operation setting). • 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 167 • Reduced Power Consumption reduces outdoor unit capacity. • 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 168 • Change the DIP switches if Night Quiet Mode is no longer desired. • • 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 169 Ten (10) Times DC Link Voltage 230V “dc” “230” 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 170: Self Diagnosis Functions
LGMV software (PRCTSL1 and PRCTFE1) allows the service technician or commissioning agent to connect a computer USB port to the Multi F / Multi F MAX system’s main printed circuit board (PCB) using an accessory cable without the need for a separate interface device.
Page 171 XP/Vista/7 32 bit (recommended), ® 64 bit installed. 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 172 LG SIMS The SIMs WLAN module and the smart phone app together provide monitoring and trouble- shooting capability for LG Multi F / Multi F MAX systems. SIMs functions only with LG Duct Free products. SIMs can display and graph operational data for the air conditioner system including the indoor unit and the outdoor unit.
Page 173 • ODU Electric - Out- door Unit Electric data graph is displayed. 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 174 Indoor unit EPROM error Indoor unit BLDC motor fan lock 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 175 Outdoor unit brushless direct current (BLDC) fan motor lock error Outdoor unit PFC overcurrent (peak) error 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 176 ASHRAE Standard 15 / 34 and addenda current as of the date of this publication. 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 177 Gas Leak Detector Indoor Unit Ventilation Inlet / Outlet 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 178: Installation Checklists
Indoor units and branch distribution unit(s) (Multi F MAX only) are installed, properly supported, and located indoors in a non-cor- rosive environment. Multi F / Multi F MAX gravity condensate drain line was connected and routed where it properly drains away or, if installed in a mechanical room, was connected and properly routed to a drain terminal.
Page 179 Power wiring to the Multi F / Multi F MAX outdoor unit was installed per all local electrical code requirements. Power wiring to the indoor units and branch distribution unit(s) (Multi F MAX only) was installed per all local electrical code requirements.
Page 180 Major Component Rough-In Piping and Insulation Brazing Practices Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 181 Installation—Branch Distribution Unit (Multi F MAX Systems Only) Installation—Power Wire and Communications Cables 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 182 - ________CF x 5.29 - (________) = ________ Additional Charge (lbs.) 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 183 - ________CF x 3.53 - (________) = ________ Additional Charge (lbs.) 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 184 20001747 ISO 9001: 2008 LG ELECTRONICS INC. Refer to Service Manuals posted on www.lghvac.com for a full description of all error codes and work-arounds. LG Electronics Products Support 1-888-865-3026 USA LG Electronics, U.S.A., Inc. Follow the prompts for HVAC products.
Page 185 MULTI MULTI CEILING CASSETTE INDOOR UNIT INSTALLATION MANUAL • LMCN077HV 7 kBtu • LCN097HV4 9 kBtu • LCN127HV4 12 kBtu • LMCN185HV 18 kBtu...
Page 186 For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice. ©LG Electronics U.S.A., Inc. This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.
Page 187 Multi F MAX Refrigerant Charge Worksheet ....................65 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 188: Safety Instructions
Sharp edges may cause personal injury. 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 189 Improper piping may cause refrigerant leaks and system malfunction. 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 190 Poor cable connections can cause equipment malfunction. 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 191 To avoid physical injury, use caution when cleaning or servicing the air conditioner. 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 192 Keep the power switch on during the operational season. 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 193: Introduction
• Insulation for additional drain hose insulation lock/split washers 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 194 Image Grille Kit (PT-QCHW0 or One (1) PT-UQC) 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 195: Unit Nomenclature
• All indoor units are compatible with wired controllers 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 196: General Data
551 psi design pressure of R410A. Inadequate piping may fail when pressurized. Allowable Indoor Unit to Outdoor Unit Connections In Multi F / Multi F MAX multi-zone systems, the Ceiling Cassette IDUs can be connected to the Multi F outdoor units (ODUs) listed in the table below.
Page 197: Specifications
(DB) and 60ºF wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 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 198 (flare connection) Thermistor for Evaporator Turbo fan Outlet Temperature Liquid pipe connection port (flare connection) Table 6: Multi F Multi Zone Art Cool Mirror Wall-Mounted Indoor Unit Refrigerant Pipe Connection Port Diameters. Model No. Vapor (inch) Liquid (inch) LMCN077HV LCN097HV4 Ø3/8...
Page 199: Typical Multi F/Multi F Max Systems
IDUs that can be connected to a Multi F system. A typical Multi F Max system consists of an ODU, refrigerant piping, one or two branch distribution units (BDU), and two (2) to eight (8) IDUs.
Page 200 Depends on the size of the indoor unit piping Ø3/4 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 201: Refrigerant Piping Requirements
Field Supplied Refrigerant Piping Type ACR copper is the only approved refrigerant pipe material for use with LG Multi F air conditioning products. ACR rated tubing is the only type that ships with yellow caps. Approved tubing for use with Multi F products will be marked “R410 RATED” along the length of the tube.
Page 202: General Installation Guidelines
• Install radiant heat or another type of heating system to the floor. 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 203 Before opening the shipping container, check the container labeling to verify the unit received is the correct unit. Verify the unit capacity, type, and voltage. 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 204 Uni t Si z e Ceiling 18-5/32 inches 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 205: Install Ceiling Cassette
Measure the unit at each corner to verify that it is level. 5. Remove the installation guide (template). 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 206: Installing Drain System
• After the test is complete, connect the flexible drain hose to the indoor unit drain port. Drain Pan 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 207 No Pipe Size Substitutions Use only the pipe size selected by the LATS Multi F pipe system design software or as conveyed in the product installation instructions. Using a different size is prohibited and may result in a system malfunction or failure to work at all.
Page 208: Refrigerant Piping
Multi F MAX Y-Branch Kit PMBL5620 The LG supplied Y-Branch Kit PMBL5620 MUST be used when two branch distribution units are connected to one Multi F MAX system. Field-supplied fittings are not permitted. Each Y-branch kit comes with two (2) Y-branches (one for the liquid line and one for the vapor line) and insulation covers.
Page 209 Tube wall thickness should meet local code requirements and be approved for an operating pressure of 551 psi. If local code does not specify wall thickness, LG suggests using tube thickness per table below. When bending tubing, try to keep the number of bends to a minimum, and use the largest radii possible to reduce the equivalent length of installed pipe;...
Page 210 ASTM B-88 Standards. Inches to feet conversion (12 in./ft.) 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 211 Anticipated Linear Expansion (LE) (inches) 1-1/2 2-1/2 3-1/2 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 212 A + B ~ 12" – 19" Max. 12" Max. 12" Max. 12" 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 213 Support Band Down Stop Hexagonal Nut Refrigerant Pipe 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 214 Insulation thickness (value in parenthesis) = 3/4 inch. 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 215: Piping Materials And Handling
24 hours. 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 216: Piping Connections
Uneven surface thickness 0.07 – 0.8 Even length 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 217: Idu To Odu
Ø3/8 valve Ø1/4 12,000 Btu/h 18,000 Btu/h Ø1/2 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 218 Ø3/8 x 4 Ø3/8 x 3, Ø5/8 x 1 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 219 18,000 Btu/h Ø3/8 → Ø1/2 Connection Socket Figure 46: Possible Outdoor Unit or Branch Distribution Unit (Multi F MAX only) to Indoor Unit Connections. 1. 3/8 in. to 3/8 in. Connection 2. 3/8 in. to 1/2 in. Flare side to indoor unit...
Page 220 • Cooling mode refrigerant temperature ranges: Liquid 75-118°F; Low Pressure Vapor 40-90°F 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 221: Piping Insulation
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 222 Multi F / Multi F MAX System Power Wiring and Communications Cable For both Multi F and Multi F MAX systems, line voltage is wired to the outdoor unit only. The outdoor unit will supply power to the branch distribution units (Multi F MAX systems only) and the indoor units through the power wiring / communications cable.
Page 223: Electrical Wiring
If power wires are not properly terminated and firmly attached, there is risk of fire, electric shock, and physical injury or death. 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 224: Controller Options
As always, follow all safety warnings and notes when operating the units using the remote controller. Additionally, all of the Multi F / Multi F Max outdoor models can use the following con- trollers when accompanied with the PI 485 VNet Accessory: •...
Page 225 • Connect the electrical cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection. Be sure that the color of the wires at the outdoor unit / BD unit (Multi F MAX systems only) along with the terminal numbers are the same as those for the indoor unit.
Page 226: Indoor Unit Electrical Connections Procedure
Easily connects at the four-way ceiling-cassette three (3) inch fresh air knockout hole. 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 227: Decorative Grille Kit Installation
Insulation should fit tightly so that cool air does not leak 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 228: Self Diagnosis Functions
• Unit Conversion: Converts metric values to imperial values. 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 229 • MS Office 2003, 2007 (recommended) for select reporting functions 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 230: Lg Sims - Self Diagnosis Functions
Main Info Tab Help Menu (File is Factory Use Only) 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 231 - Outdoor Unit Electric data graph is displayed. 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 232: Controller Options
3(C) CN-REMO 1(L1 ) 2(L2) To Wired Controller 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 233 2. Store a minimal amount of cable in the handy box. Any additional cable should be coiled and stored near the indoor unit control panel. 3. If additional cable length is needed, order a thirty-three (33) foot LG Wired Remote Group Control Extension cable (Model No. PZCWRC1).
Page 234 Hanging the Wired Controller, continued. • Connect indoor unit and wired controller using included connection cable. • Use an LG-manufactured extension cable (sold separately) if the distance between wired remote controller and the indoor unit is >32.8 feet. Figure 72: Indoor Unit to Wired Controller Connection (Controller Appearance May Vary Depending on Model Chosen).
Page 235: Troubleshooting
Indoor unit BLDC motor fan lock Indoor unit middle pipe sensor error 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 236 Refer to Service Manuals posted on www.lghvac.com for a full description of all error codes and workarounds. 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 237: Cautions For Refrigerant Leaks
ASHRAE Standard 15-2010 / 34-2010 and addenda current as of the date of this publication. 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 238: Installation Checklist
Indoor units and branch distribution unit(s) (Multi F MAX only) are installed, properly supported, and located indoors in a non- corrosive environment. Multi F / Multi F MAX gravity condensate drain line was connected and routed where it properly drains away or, if installed in a mechanical room, was connected and properly routed to a drain terminal.
Page 239 Power wiring to the Multi F / Multi F MAX outdoor unit was installed per all local electrical code requirements. Power wiring to the indoor units and branch distribution unit(s) (Multi F MAX only) was installed per all local electrical code requirements.
Page 240 Major Component Rough-In Piping and Insulation Brazing Practices Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 241 Installation—Condensate Pump / Drain Installation Installation—Power Wire and Communications Cables 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 242: Multi F Refrigerant Charge Worksheet
- ________CF x 5.29 - (________) = ________ Additional Charge (lbs.) 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 243: Multi F Max Refrigerant Charge Worksheet
- ________CF x 3.53 - (________) = ________ Additional Charge (lbs.) 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 244 Who to call for assistance Freight Damage and Unit Replacements Your LG Manufacturer Representative Missing Parts Your LG Manufacturer Representative Freight Damage and Unit Replacements Your LG Manufacturer Representative Received Wrong Indoor Unit Model Your LG Manufacturer Representative Installation, Startup, and Commissioning Technical Assistance 1-888-865-3026 For warranty information, visit www.lghvac.com.
Page 245 20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. LG Customer Information Center, Commercial Products Commercial Air Conditioning Division 1-888-865-3026 USA 4300 North Point Parkway Follow the prompts for commercial A/C products and parts. Alpharetta, Georgia 30022 IM_Multi_F_CeilingCassette_7_16 www.lg-vrf.com...
Page 246 MULTI MULTI CEILING CASSETTE INDOOR UNIT INSTALLATION MANUAL • LMCN077HV 7 kBtu • LCN097HV4 9 kBtu • LCN127HV4 12 kBtu • LMCN185HV 18 kBtu...
Page 247 For continual product development, LG Electronics U.S.A., Inc., reserves the right to change specifications without notice. ©LG Electronics U.S.A., Inc. This document, as well as all reports, illustrations, data, information, and other materials are the property of LG Electronics U.S.A., Inc.
Page 248 Multi F MAX Refrigerant Charge Worksheet ....................65 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 249: Safety Instructions
Sharp edges may cause personal injury. 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 250 Improper piping may cause refrigerant leaks and system malfunction. 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 251 Poor cable connections can cause equipment malfunction. 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 252 To avoid physical injury, use caution when cleaning or servicing the air conditioner. 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 253 Keep the power switch on during the operational season. 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 254: Introduction
• Insulation for additional drain hose insulation lock/split washers 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 255 Image Grille Kit (PT-QCHW0 or One (1) PT-UQC) 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 256: Unit Nomenclature
• All indoor units are compatible with wired controllers 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 257: General Data
551 psi design pressure of R410A. Inadequate piping may fail when pressurized. Allowable Indoor Unit to Outdoor Unit Connections In Multi F / Multi F MAX multi-zone systems, the Ceiling Cassette IDUs can be connected to the Multi F outdoor units (ODUs) listed in the table below.
Page 258: Specifications
(DB) and 60ºF wet bulb (WB) and outdoor ambient conditions of 47ºF dry bulb (DB) and 43ºF wet bulb (WB). 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 259 (flare connection) Thermistor for Evaporator Turbo fan Outlet Temperature Liquid pipe connection port (flare connection) Table 6: Multi F Multi Zone Art Cool Mirror Wall-Mounted Indoor Unit Refrigerant Pipe Connection Port Diameters. Model No. Vapor (inch) Liquid (inch) LMCN077HV LCN097HV4 Ø3/8...
Page 260: Typical Multi F/Multi F Max Systems
IDUs that can be connected to a Multi F system. A typical Multi F Max system consists of an ODU, refrigerant piping, one or two branch distribution units (BDU), and two (2) to eight (8) IDUs.
Page 261 Depends on the size of the indoor unit piping Ø3/4 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 262: Refrigerant Piping Requirements
Field Supplied Refrigerant Piping Type ACR copper is the only approved refrigerant pipe material for use with LG Multi F air conditioning products. ACR rated tubing is the only type that ships with yellow caps. Approved tubing for use with Multi F products will be marked “R410 RATED” along the length of the tube.
Page 263: General Installation Guidelines
• Install radiant heat or another type of heating system to the floor. 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 264 Before opening the shipping container, check the container labeling to verify the unit received is the correct unit. Verify the unit capacity, type, and voltage. 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 265 Uni t Si z e Ceiling 18-5/32 inches 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 266: Install Ceiling Cassette
Measure the unit at each corner to verify that it is level. 5. Remove the installation guide (template). 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 267: Installing Drain System
• After the test is complete, connect the flexible drain hose to the indoor unit drain port. Drain Pan 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 268 No Pipe Size Substitutions Use only the pipe size selected by the LATS Multi F pipe system design software or as conveyed in the product installation instructions. Using a different size is prohibited and may result in a system malfunction or failure to work at all.
Page 269: Refrigerant Piping
Multi F MAX Y-Branch Kit PMBL5620 The LG supplied Y-Branch Kit PMBL5620 MUST be used when two branch distribution units are connected to one Multi F MAX system. Field-supplied fittings are not permitted. Each Y-branch kit comes with two (2) Y-branches (one for the liquid line and one for the vapor line) and insulation covers.
Page 270 Tube wall thickness should meet local code requirements and be approved for an operating pressure of 551 psi. If local code does not specify wall thickness, LG suggests using tube thickness per table below. When bending tubing, try to keep the number of bends to a minimum, and use the largest radii possible to reduce the equivalent length of installed pipe;...
Page 271 ASTM B-88 Standards. Inches to feet conversion (12 in./ft.) 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 272 Anticipated Linear Expansion (LE) (inches) 1-1/2 2-1/2 3-1/2 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 273 A + B ~ 12" – 19" Max. 12" Max. 12" Max. 12" 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 274 Support Band Down Stop Hexagonal Nut Refrigerant Pipe 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 275 Insulation thickness (value in parenthesis) = 3/4 inch. 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 276: Piping Materials And Handling
24 hours. 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 277: Piping Connections
Uneven surface thickness 0.07 – 0.8 Even length 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 278: Idu To Odu
Ø3/8 valve Ø1/4 12,000 Btu/h 18,000 Btu/h Ø1/2 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 279 Ø3/8 x 4 Ø3/8 x 3, Ø5/8 x 1 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 280 18,000 Btu/h Ø3/8 → Ø1/2 Connection Socket Figure 46: Possible Outdoor Unit or Branch Distribution Unit (Multi F MAX only) to Indoor Unit Connections. 1. 3/8 in. to 3/8 in. Connection 2. 3/8 in. to 1/2 in. Flare side to indoor unit...
Page 281 • Cooling mode refrigerant temperature ranges: Liquid 75-118°F; Low Pressure Vapor 40-90°F 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 282: Piping Insulation
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 283: Electrical Wiring
Multi F / Multi F MAX System Power Wiring and Communications Cable For both Multi F and Multi F MAX systems, line voltage is wired to the outdoor unit only. The outdoor unit will supply power to the branch distribution units (Multi F MAX systems only) and the indoor units through the power wiring / communications cable.
Page 284: Power Wiring Specifications And Best Practices
If power wires are not properly terminated and firmly attached, there is risk of fire, electric shock, and physical injury or death. 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 285: Controller Options
As always, follow all safety warnings and notes when operating the units using the remote controller. Additionally, all of the Multi F / Multi F Max outdoor models can use the following con- trollers when accompanied with the PI 485 VNet Accessory: •...
Page 286 • Connect the electrical cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection. Be sure that the color of the wires at the outdoor unit / BD unit (Multi F MAX systems only) along with the terminal numbers are the same as those for the indoor unit.
Page 287: Indoor Unit Electrical Connections Procedure
Easily connects at the four-way ceiling-cassette three (3) inch fresh air knockout hole. 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 288: Decorative Grille Kit Installation
Insulation should fit tightly so that cool air does not leak 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 289: Self Diagnosis Functions
• Unit Conversion: Converts metric values to imperial values. 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 290 • MS Office 2003, 2007 (recommended) for select reporting functions 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 291: Lg Sims - Self Diagnosis Functions
Main Info Tab Help Menu (File is Factory Use Only) 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 292 - Outdoor Unit Electric data graph is displayed. 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 293: Controller Options
3(C) CN-REMO 1(L1 ) 2(L2) To Wired Controller 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 294 2. Store a minimal amount of cable in the handy box. Any additional cable should be coiled and stored near the indoor unit control panel. 3. If additional cable length is needed, order a thirty-three (33) foot LG Wired Remote Group Control Extension cable (Model No. PZCWRC1).
Page 295 Hanging the Wired Controller, continued. • Connect indoor unit and wired controller using included connection cable. • Use an LG-manufactured extension cable (sold separately) if the distance between wired remote controller and the indoor unit is >32.8 feet. Figure 72: Indoor Unit to Wired Controller Connection (Controller Appearance May Vary Depending on Model Chosen).
Page 296: Troubleshooting
Indoor unit BLDC motor fan lock Indoor unit middle pipe sensor error 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 297 Refer to Service Manuals posted on www.lghvac.com for a full description of all error codes and workarounds. 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 298: Cautions For Refrigerant Leaks
ASHRAE Standard 15-2010 / 34-2010 and addenda current as of the date of this publication. 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 299: Installation Checklist
Indoor units and branch distribution unit(s) (Multi F MAX only) are installed, properly supported, and located indoors in a non- corrosive environment. Multi F / Multi F MAX gravity condensate drain line was connected and routed where it properly drains away or, if installed in a mechanical room, was connected and properly routed to a drain terminal.
Page 300 Power wiring to the Multi F / Multi F MAX outdoor unit was installed per all local electrical code requirements. Power wiring to the indoor units and branch distribution unit(s) (Multi F MAX only) was installed per all local electrical code requirements.
Page 301 Major Component Rough-In Piping and Insulation Brazing Practices Due to our policy of continuous product innovation, some specifications may change without notification. ©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
Page 302 Installation—Condensate Pump / Drain Installation Installation—Power Wire and Communications Cables 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 303: Multi F Refrigerant Charge Worksheet
- ________CF x 5.29 - (________) = ________ Additional Charge (lbs.) 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 304: Multi F Max Refrigerant Charge Worksheet
- ________CF x 3.53 - (________) = ________ Additional Charge (lbs.) 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 305 Who to call for assistance Freight Damage and Unit Replacements Your LG Manufacturer Representative Missing Parts Your LG Manufacturer Representative Freight Damage and Unit Replacements Your LG Manufacturer Representative Received Wrong Indoor Unit Model Your LG Manufacturer Representative Installation, Startup, and Commissioning Technical Assistance 1-888-865-3026 For warranty information, visit www.lghvac.com.
Page 306 20001747 ISO 9001: 2008 LG ELECTRONICS INC. LG Electronics, U.S.A., Inc. LG Customer Information Center, Commercial Products Commercial Air Conditioning Division 1-888-865-3026 USA 4300 North Point Parkway Follow the prompts for commercial A/C products and parts. Alpharetta, Georgia 30022 IM_Multi_F_CeilingCassette_7_16 www.lg-vrf.com...
Page 307 • Please read this installation manual completely before installing the product. • Installation work must be performed in accordance with the national wiring standards by authorized personnel only. • Please retain this installation manual for future reference after reading it thoroughly. TYPE : Multi Type http://www.lghvac.com www.lg.com P/NO : MFL68280101...
Page 308 FLEX MULTI SPLIT INSTALLATION INSTRUCTIONS...
Page 309 Multi Air Conditioner Installation Manual TABLE OF CONTENTS Required Tools Installation Requirements Installation Parts Provided ...........4 Safety Precautions ..............5 Installation of Indoor, Outdoor Unit ........8 Select the best location ............8 o Level gauge Seaside Applications and Installation ......10 o Screw driver Seasonal Wind And Cautions In Winter......11 o Electric drill Piping length and elevation ..........12...
Page 310: Installation Parts Provided
Installation Parts Provided Installation Parts Provided [Wall mounted / ART COOL Mirror] Type 1 Type 2 Type 3 Type 4 Installation plate Installation plate Installation plate Installation plate Type "B" screw Type "B" screw Type "B" screw Type "C" screw Type "B"...
Page 311: Safety Precautions
Product Introduction Safety Precautions To prevent the injury of the user or other people and property damage, the following instructions must be followed. n Be sure to read before installing the air conditioner. n Be sure to observe the cautions specified here as they include important items related to safety. n Incorrect operation due to ignoring instruction will cause harm or damage.
Page 312 Safety Precautions Do not install the product at a place that there Use caution when unpacking and installing. is concern of falling down. • Otherwise, it may result in personal injury. • Sharp edges may cause injury. Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge. Do not compress air or Oxygen and Do not use Flammable gases.
Page 313 Safety Precautions CAUTION n Installation Install the drain hose to ensure that drain Install the product so that the noise or hot can be securely done. wind from the outdoor unit may not cause any damage to the neighbors. • Otherwise, it may cause water leakage. •...
Page 314: Installation Of Indoor, Outdoor Unit
Safety Precautions Installation of Indoor, Outdoor Unit Read completely, then follow step by step. Select the best location Indoor unit 1. Do not have any heat or steam near the unit. [Wall mounted / ART COOL Mirror] 2. Select a place where there are no obstacles in More than front of the unit.
Page 315 Installation of Indoor, Outdoor Unit Outdoor unit 1. If an awning is built over the unit to prevent di- rect sunlight or rain exposure, make sure that more than heat radiation from the condenser is not re- 600 (23 21/32) stricted.
Page 316: Seaside Applications And Installation
Installation of Indoor, Outdoor Unit Seaside Applications and Installation 1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced. 2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion on the product.
Page 317: Seasonal Wind And Cautions In Winter
Installation of Indoor, Outdoor Unit Seasonal Wind And Cautions In Winter - Sufficient measures are required in a snow area or severe cold area in winter so that product can be operated well. - Get ready for seasonal wind or snow in winter even in other areas. - Install a suction and discharge duct not to let in snow or rain.
Page 318 Installation of Indoor, Outdoor Unit 12 Multi Air Conditioner...
Page 319 Installation of Indoor, Outdoor Unit Distributor Piping Type Unit : m(ft) Min length of Max Elevation Max Eleva- Max total length Max length Max length Max Combi- Outdoor Unit Max length each pipe Between each tion of all pipes nation Capacity of each (Main /...
Page 320: Installation
Installation Installation [Wall mounted / ART COOL Mirror] Connecting the piping # Standard / Artcool Mirror Type 1. Prepare the indoor unit's piping and drain hose for installation through the wall. 2. Remove the plastic tubing retainer(see the il- lustration on the right) and pull the tubing and drain hose away from chassis.
Page 321 Installation # Standard Libero / Artcool Libero Type 1. Pull the screw cap at the bottom of the indoor unit 2. Remove the chassis cover from the unit by loosing screws Chassis cover Indoor unit back side view 3. Pull back the tubing holder. Pipe Port 4.
Page 322 Installation Connecting the piping to the indoor unit and drain hose to drain pipe. 1. Align the center of the pipes and suffi- Indoor unit tubing Flare nut Pipes ciently tighten the flare nut by hand. 2. Tighten the flare nut with a wrench. Open-end wrench (fixed) Outside diameter Torque...
Page 323 Installation Wrap the insulation material around the con- Plastic bands Insulation material necting portion. 1. Overlap the connection pipe insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there is no gap. Indoor unit pipe Connection pipe 2.
Page 324: How To Fix
Installation Installation of filters 1) Detach two attached tapes from the plasma filter. Plasma Filter How To Fix The wall you select should be strong and solid enough to prevent vibration 1. Mount the installation plate on the wall with type "A"...
Page 325: Wiring Connection
Installation Wiring Connection 1. Connect the wires to the terminals on the con- trol board individually according to the outdoor unit connection. • Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively.
Page 326: Ceiling Dimension And Hanging Bolt Location
Installation [Ceiling Cassette Type] Ceiling dimension and hanging bolt location • The dimensions of the paper model for installation are the same as those of the ceiling opening dimensions. Ceiling Ceiling board Level gauge • Select and mark the position for fixing bolts and piping 585~660(23 1/16~26) (Ceiling Opening) hole.
Page 327: How To Fix
Installation How to Fix Ceiling Keep the length of the bolt Hanging bolt from the bracket to 40mm(1-9/16 inch) (W3/8 or M10) Flat washer for M10 Air Conditioner body (W3/8 or M10) (accessory) Ceiling board Ceiling board Spring washer (M10) Keep the length of 31~34mm(1.22~1.34inch) between the air conditioner bottom surfac e and the ceiling surface...
Page 328: Installation Of Wired Remote Controller(Optional)
Installation Installation of Wired Remote Controller(Optional) 1. Please fix tightly using provided screw after placing remote controller setup board on the place where you like to setup. - Please set it up not to bend because poor setup could take place if setup board bends. Please set up remote controller board fit to the reclamation box if there is a reclamation box.
Page 329 Installation 3. Please fix remote controller upper part into <Connecting order> the setup board attached to the surface of the wall, as the picture below, and then, connect with setup board by pressing lower part. Wall Wall - Please connect not to make a gap at the remote controller Side Side and setup boardʼs upper and lower, right and left part.
Page 330: Installation Of Decorative Panel
Installation Installation of Decorative Panel The decorative panel has its installation direction. Before installing the decorative panel, always remove the paper template. 1. Remove the packing and take out air inlet grille from front panel. Front grille 2. Remove the Corner covers of the panel. Coner cover 3.
Page 331 Installation 5. Fit the corner covers. 6. Open two screws of control panel cover. Screw 7. Connect one display connector and two vane control connectors of front panel to indoor unit PCB. The position marking on PCB is as: Display connector : CN-DISPLAY Vane control connector: CN-VANE 1,2 CN-VANE 1,2 CN-DISPLAY 8.
Page 332: Drain Piping
Installation CAUTION: Install certainly the decorative panel. Cool air leakage causes sweating. ⇨ Water drops fall. Good example Bad example Air conditioner unit Air conditioner Cool air leakage unit (no good) Ceiling Ceiling board board Decorative Decorative panel panel Fit the insulator (this part) and be careful for cool air leakage HEAT INSULATION 1.
Page 333 Installation [Ceiling Concealed Duct/Ceiling Cassette Type] • Drain piping must have down-slope (1/50 to 1/100): be Upward sure not to provide up-and-down slope to prevent rever- Pipe clamp routing sal flow. not allowed • During drain piping connection, be careful not to exert Indoor unit extra force on the drain port on the indoor unit.
Page 334 Installation Attention 1. Possible drain-head height is up to 700mm(27 9/16 inch). So, it must be in- stalled below 700mm(27 9/16 inch). 1/50~1/100 MAX 700mm 2. Keep the drain hose downward up to (27 9/16 inch) 1/50~1/100 inclination. Prevent any upward flow or reverse flow in any part.
Page 335: Flaring Work And Connection Of Piping
Flaring Work and Connection of Piping Flaring Work and Connection of Piping Flaring work Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the fol- Copper Slanted Uneven Rough lowing procedure. tube 1) Cut the pipes and the cable. n Use the accessory piping kit or the pipes purchased locally.
Page 336: Connection Of Piping - Outdoor
Flaring Work and Connection of Piping Connection of piping - Outdoor Align the center of the piping and sufficiently tighten the flare nut by hand. Connecting pipe order 1) ROOM A~C gas side pipe 2) ROOM A~C liquid side pipe Ø12.7(1/2 inch) Connector Finally, tighten the flare nut with torque wrench...
Page 337 Flaring Work and Connection of Piping • For the units with capacity more than 48 kBtu/h, the installation piping is connectable in four Continuous directions.(refer to figure 1) • When connecting in a downward direction, knock out the knockout hole of the base pan. Torque wrench (refer to figure 2)
Page 338 Flaring Work and Connection of Piping Branch [unit:mm] Model Gas Pipe Liquid Pipe Ø19.05 Ø9.52 Ø19.05 Ø9.52 PMBL5620 Ø9.52 Ø19.05 Y branch To Outdoor Unit To BD Unit • Ensure that the branch pipes are attached horizontally or vertically (see the diagram below.) Horizontal Facing upwards...
Page 339: Installation
Flaring Work and Connection of Piping Installation • This unit may be installed suspended from the ceiling or mounted on the wall. • This unit may only be installed horizontally , as shown in the diagram below.(Side B is facing up) However, it may be freely installed in any direction forward or back, and to the sides.
Page 340: Installation Of The Main Unit
Flaring Work and Connection of Piping Installation of The Main Unit NOTICE • This unit has two different installation types: (1) Ceiling-suspended type and (2) wall-mounted type. • Choose the proper installation pattern according to the location of installation. • The installation location for printed wiring board can be changed.
Page 341: Connecting The Cable Between Indoor Unit, Distributor Unit And Outdoor Unit
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit Connect the cable to the Indoor unit. Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the outdoor unit connection.
Page 342: Connect The Cable To The Distributor Unit
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit Connect the cable to the Distributor unit. • Connect refrigerant pipes and connection wires to the appropriate ports maked with matching alphabets (A, B and C) on this unit. •...
Page 343: Connect The Cable To The Outdoor Unit
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit Connect the cable to the Outdoor unit. 1. Remove the control cover from the unit by loos- ening the screw. Connect the wires to the terminals on the control Power Power Power...
Page 344 Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit NOTICE 1. Use connection cable NRTL(UL, ETL, CAS…) listed and stranded copper(4) THHN conductors, sunlight (UV) resistant ROHS compliant PVC jacket 600V direct burial listed, approved for wet conditions. Temperature rated for –20℃(-4℉) to 90℃(194℉). And this cable should be enclosed in conduit.
Page 345: Connection Method Of The Connecting Cable(Example)
Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit Connection method of the connecting cable(Example) (1) Remove the side panel and knockouts of conduit panel. (for low voltage line) (2) Pull out connection cable through conduit. Conduit (filed supply) (3) After conduit to the panel, fix nut to the opposite Lock nut (field supply)
Page 346: Checking The Drainage, Insulating The Pipe And Special Piping Applications
Checking the Drainage, Insulating the Pipe and Special Piping Applications Checking the Drainage, Insulating the Pipe and Special Piping Applications Checking the drainage 1. Remove the Air Filter. 2. Check the drainage. • Spray one or two glasses of water upon the evaporator.
Page 347: Air Purging And Evacuation
Air Purging and Evacuation Air Purging and Evacuation Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. 1. Pressure in the system rises. 2. Operating current rises. 3. Cooling(or heating) efficiency drops. 4. Moisture in the refrigerant circuit may freeze and block capillary tubing. 5.
Page 348: Evacuation
Air Purging and Evacuation Evacuation 1. Connect the charge hose end described in the preceding steps to the vacuum pump to evacuate the tubing and indoor unit. Indoor unit Confirm the "Lo" knob of the manifold valve is open. Then, run the vacuum pump. Manifold valve The operation time for evacuation varies with Pressure...
Page 349: Charging
Charging Charging n If installed total piping length is more than standard total length, additional refrigerant charging is necessary. Below standard total piping length, additional refrigerant charging is not required. Multiple Piping Models Unit:m(ft) Standard Total Piping Max total length of all Additional Refrigerant Outdoor Unit Ca- Max length of each...
Page 350 Charging Distributor type Models Additional charge (oz) = (( Total Main piping Length - Main Standard Length ) x 0.55 + (A Room Branch Length – Standard Length ) x 0.22 + (B Room Branch Length – Standard Length ) x 0.22 + (C Room Branch Length –...
Page 351: Installation Pi485
Installation PI485 Installation PI485 Fix the PI485 PCB as shown in Fig. Detailed installation method refer to PI485 Installation Manual. 18k Btu/h, 24k Btu/h 36kBtu/h This label is should be applied in the location This label is should be applied in the location where where LGAP(Sub PCB for Central Controller is...
Page 352: Test Running
Test Running Test Running - Check that all tubing and wiring have been properly connected. - Check that the gas and liquid side service valves are fully open. Prepare remote control Remove the battery cover by pulling it according to the arrow direction.Insert new batteries making sure that the (+) and (–) of battery are installed correctly.
Page 353: Function
Function Function Dip S/W Setting If you set the Dip Switch when power is on, the change in setting is not applicable. The changing set- ting is enabled only when Power is reset. Dip Switch Function 1 2 3 4 Normal Operation (No Function) Forced Cooling Operation Wiring Error Check...
Page 354: Forced Cooling Operation
Function 18/24(1Ø) kBtu/h 36(1Ø) kBtu/h SW01N DIP-SW 54(1Ø) kBtu/h Forced Cooling Operation Adding the refrigerant in winter. Setting Procedure 1. Set the Dip Switch as follow after shutting the power source down. 2. Reset the power. 3. Check that the Red LED of PCB is on during work. (The indoor unit is operated by force.) 4 Add the specific amount of refrigerant.
Page 355: Wiring Error Check
Function Wiring Error Check You can check whether or not the wiring is correct. Setting Procedure 1. Set the Dip Switch as follow after shutting the power source down. 2. Reset the power. 3. Check that the Re and Green LED of PCB are on during work. (The indoor unit is oper- ated by force.) 4.
Page 356: Night Quiet Mode
Function Saving Power Consumption Current level. Phase 1Ø Model 18/24k Step1(A) Step2(A) Saving Power Consumption with Mode Lock. Saving Power Saving Power Consumption (step 1) Consumption (step 1) + Mode Lock (Cooling) + Mode Lock (Heating) Saving Power Saving Power Consumption (step 2) Consumption (step 2) + Mode Lock (Cooling)
Page 357: Mode Lock
Function Mode Lock Setting Procedure 1. Set the Dip Switch as follow after shutting the power source down. Only Cooling Mode Only Heating Mode 2. Reset the power. Mode Lock with Night Quiet Mode Mode Lock (Cooling) Mode Lock (Cooling) + Night Quiet Mode + Night Quiet Mode (step 1)
Page 358: Pcb Display(18/24K Model Only)
Function PCB Display(18/24k Model Only) It is useful to check the cycle data without LGMV. Operating Method Whenever you push the Tact Switch, the cycle information will be shown as below. h After 1page is displayed, subsequently 2page is displayed. Tact S/W Display Item...
Page 359: Combination Indoor Units
Combination indoor units Combination indoor units The indoor units connectable to the outdoor unit are shown below Model names Outdoor Unit Capacity (Btu/h class) Category Chassis Capacity, kW(kBtu/h Class) 2.1(7) 2.6 (9) 3.5 (12) 4.2(15) 5.3 (18) 7.03 (24) 10.6 (36) Connectable Combination Wall mounted AMNW07GDBL1...
Page 360 54 Multi Air Conditioner...
Page 361 1. Please call the installing contractor of your product, as warranty service will be provided by them. 2. If you have service issues that have not been addressed by the contractor, please call 1-888-865-3026. CANADA Service call Number # : (888) LG Canada, (888) 542-2623...

This manual is also suitable for:

Multi f maxLmu18chv Lmu24chv Lmu30chv Lmu36chv Pmbd3620 ... Show all

LG MULTI F Installation Manual

Section 1

Safety Instructions

Nomenclature

General Data

Refrigerant Piping Insulation

Final Installation Procedures

LG Monitoring View (LGMV) Diagnostic Software

LG Smart Inverter Monitoring System (SIMS)

Maintenance Recommendations

Section 2

Section 3

Safety Instructions

Introduction

Unit Nomenclature

General Data

General Installation Guidelines

Piping Connections

Electrical Wiring

Troubleshooting

Cautions for Refrigerant Leaks

Installation Checklist

Multi F Refrigerant Charge Worksheet

Multi F MAX Refrigerant Charge Worksheet

Section 4

Safety Instructions

Introduction

Unit Nomenclature

General Data

General Installation Guidelines

Piping Connections

Electrical Wiring

Troubleshooting

Cautions for Refrigerant Leaks

Installation Checklist

Multi F Refrigerant Charge Worksheet

Multi F MAX Refrigerant Charge Worksheet

Flex Multi Split Installation Instructions

Installation Parts Provided

Safety Precautions

Installation of Indoor, Outdoor Unit

Installation

Flaring Work and Connection of Piping

Connecting the Cable between Indoor Unit, Distributor Unit and Outdoor Unit

Checking the Drainage, Insulating the Pipe and Special Piping Applications

Air Purging and Evacuation

Charging

Installation PI485

Test Running

Function

Combination Indoor Units

Quick Links

Chapters

Troubleshooting

Related Manuals for LG MULTI F

Summary of Contents for LG MULTI F