LG LMU540HV Multi-F Max 54000 BTU Class Compressor - Outdoor Unit Only
Get the ultimate in year-round comfort for all areas of your home!
With LG's new Multi F Max Mini Split Air Conditioner and Heat Pump System, flexibility is the name of the game, so to speak. The LG LMU540HV outdoor compressor is compatible with many LG indoor unit styles and capacities. With the ability to connect and operate up to 8 interior units, either independently or all at once, you get all of the advantages of central air, typically without any duct work. However, units such as the vertical air handler (must be ducted) or the concealed ceiling units (can be ducted) give you the ability to cool more areas with a single unit. This innovative system is perfect for offices, retail establishments, new homes, additions, or retrofitting older homes.
The LMU540HV has a rated cooling capacity of 52,500 BTUs. It can be connected to almost any combination of indoor units up to 8. The maximum connected capacity is 73,000 BTUs. The unit must be connected to a minimum of 2 units with a combined minimum BTU rating of 22,000 BTUs.
The Multi F Max units also feature expanded heating capabilities for outside temperatures down to -4°F and up to 64°F. For most of the United States, a system such as the LMU540HV can be used as the primary heat supply for your space. Additionally, in the cooling mode, the capabilities range from 14°F - 118°F.
As you can see in the illustration, this system does require some additional installation items. This installation, as shown, would require one outdoor unit (LMU540HV), a Y connector/branch, two Branch Distribution Boxes and the indoor units. The Y Branch splits the initial line, each line connects to a Branch Distribution Box and then each indoor unit is connected via its own line to a Branch Box. Line sets and communication wire (sold separately) connect to each indoor unit. The indoor units shown include a Ceiling Cassette, an Art Cool Gallery unit, a Concealed Ceiling Low Static unit, a Standard Wall unit, a Mirrored Art Cool unit and a Vertical Air Handler. Each unit installed can be easily matched to your room requirements both in terms of decor and BTUs. Although the high static concealed ceiling unit is not pictured in the above installation, it is compatible as well. Each indoor unit has its own temperature control, allowing each room to be individually controlled at different temperatures.
Four branch distribution boxes are available to customize your installation. Each branch distribution unit is specific to the number of indoor units you will be using. There is a 2 unit (PMBD3620), offering two 24,000 BTU ports for a maximum of 48,000 BTU capacity. The 3 unit (PMBD3630), offers three 24,000 BTU ports for a maximum of 72,000 BTU capacity. And there are two options of 4 port units. The PMBD3640 offers four 24,000 BTU ports for a maximum of 73,000 BTU capacity and the PMBD3641 offers four ports including three standard ports and one 36,000 BTU port for a maximum of 73,000 BTU capacity. Depending on how many indoor units you will be installing, the correct size distribution unit needs to be installed. However, you do not need to use all the ports available at the time of your initial installation. If you think you will be adding additional indoor units in the future, you can "cap off" the unused ports on the branch distribution units until that later time.
Because of the complexity and flexibility of configuring the LG LMU540HV and all the required components, we ask that you contact us for expert advice and purchasing.
Indoor Unit Options
Standard Wall Unit (LMN078HVT, LSN090HSV4, LSN120HSV4, LMN158HVT, LSN180HSV4 and LMN248HVT) - The standard wall unit comes in a white finish and will blend quietly and seamlessly into any room decor. It is installed high on a wall. It connects to the outdoor compressor through a small opening in your wall, drilled behind the unit. The line set and wire (required, sold separately) are sent through the opening and connect to the compressor outside. A wireless remote is included for convenient operation from anywhere in the room. Available in 7,000, 9,000, 12,000, 15,000, 18,000, and 24,000 BTUs.
Art Cool Wall Unit (LAN090HSV4, LAN120HSV4, LAN180HSV4) - The Art Cool wall unit comes in a reflective, smoky black, mirrored finish that will add a modern flare to any decor, while still blending quietly into any room. Like the standard wall unit, it is installed high on a wall and connects to the outdoor compressor through a small opening drilled in your wall, behind the unit. The line set and wire (required, sold separately) connect to the compressor outside through this opening. A wireless remote is included for convenient operation anywhere in the room. Available in 9,000, 12,000, and 18,000 BTUs.
Art Cool Gallery (LMAN097HVP, LMAN127HVP) - An Art Cool Gallery unit can be a beautiful, non-obtrusive way to get conditioned air into any room of your choice. A 2’ x 2’ frame allows you to display a personal piece of artwork (or the included piece). The air is dispersed quietly and efficiently from the edges and bottom of the frame into your room. It is installed on a wall and connects to the outdoor compressor through a small opening drilled in your wall, behind the unit. The line set and wire (required, sold separately) connect to the compressor outside through this opening. A wireless remote is included for easy control. Available in 9,000 or 12,000 BTUs.
Ceiling Concealed Low Static Unit (LDN097HV4, LDN127HV4, LMDN186HV)- Low Static Concealed Ceiling units are installed in a ceiling and hidden from view. They require ducting as well as registers. The registers allow the conditioned air to come down into the space. Depending on the size and shape of your space, a concealed unit can be ducted for multiple rooms or one single room. As an example, an 18000 BTU unit will provide comfort control up to about 825 sq. ft. A drain pump is included with this unit as well as wired thermostat for control. Available in 9,000, 12,000, and 18,000 BTUs.
Ceiling Concealed High Static Unit (LMHN240HV, LMHN360HV) - High Static Concealed Ceiling units are installed in a ceiling and hidden from view. They require ducting as well as registers to allow the conditioned air to come into the space. Depending on the space you are trying to condition, a high static unit allows for longer duct runs from the unit itself. This unit can be installed and ducted off into several individual areas of a large space or multiple rooms. The 24,000 BTU unit will provide comfort control up to about 1100 sq. ft. A drain pump is included with this unit as well as wired thermostat for control. Available in 24,000 and 36,000 BTUs.
Ceiling Cassette Unit (LMCN077HV, LCN097HV4, LCN127HV4, LMCN185HV) - A ceiling cassette installs into the ceiling and offers 4-way airflow into your space. A grille is required on a ceiling unit (standard white grille included) and air is dispersed from all 4 sides of the grille. A ceiling cassette can be installed in the center of a room, allowing airflow all around. Alternatively, it can be installed along the edge of a room, closing off 1 or more "vents" for customized air flow. A drain pump is included with this unit as well as a wireless remote control. Available in 7,000, 9,000, 12,000, and 18,000 BTUs.
Vertical Air Handler Unit (LMVN240HV, LMVN360HV) - A vertical air handler may be used as a way of replacing a conventional air handler currently being used as part of a central system. Another possibility may be that you are looking to zone your dwelling with a mini split system regardless of whether you are using existing ductwork or adding new. With the 24,000 BTUs offered, it can be ducted into several rooms totaling about 1100 sq ft and cool them both appropriately and efficiently. Regardless of the number of spaces you are cooling/heating, the included wall mounted thermostat controls this zone.
Why Total Home Supply?
We are an LG Authorized Online Distributor. We are also the only online seller to have an LG Technical Service Advisor on staff. Whether you have pre-sales questions or you need support after your order, we are here for you. We are an LG Authorized Parts Distributor meaning any warranty parts requests are processed quickly and easily.
Because of the complexity of the components required for the LMU540HV Multi F Max Mini Split System (up to 8 units allowable), please contact our Customer Service Department. They will make certain you have everything you need for installation of your system. For purchase and help in configuring your custom system, please contact Customer Service at 1-877-847-0050.
The Multi F Max System must be installed by a qualified, licensed HVAC technician. Manufacturer covers parts only under warranty. Installer is responsible for labor warranty.
Looking for a qualified installer? Allow Preferred Contractor to help. Preferred Contractor has a nationwide network of trained mini split installers. Click here to fill out the form and get started. An HVAC expert will contact you to learn about your needs and get a quote for you whether you have already purchased the equipment or are just starting to research.
- Net Weight (lbs.)
- Number of Zones
- Maximum Number of Indoor Units
- SEER (non-ducted indoor units)
- SEER (ducted indoor units)
- SEER (ducted & non ducted)
- Energy Star
- Cooling Amps
- Cooling BTUs
- Includes Heat Pump
- Heat Pump BTUs
- Heat Pump Heating Amps
- Outdoor Unit Noise Level (dBA)
- Circuit Breaker Size (Amps)
- Operating Range - Cooling
- 14° F ~ 118° F
- Operating Range - Heating
- -4° F ~ 64° F
- Min. Outdoor Temp for Heat °F
- Inverter Technology
- Pipe Length (No Addl Refr Req)
- Outdoor Unit Width (in.)
- 37.406 "
- Outdoor Unit Depth (in.)
- 15.75 "
- Outdoor Unit Height (in.)
- 54.344 "
- Outdoor Unit Weight (lbs.)
- AHRI Certified
- Parts Warranty
- 10 Years
- Compressor Warranty
- 10 Years
- Labor Warranty
- Warranty Detail
- The Standard Warranty Period and the Compressor Warranty Period are extended to a total of ten (10) years (the “Extended Warranty Period”) for qualified Systems that have been (a) installed by a party that has completed the Training Requirements, (b) installation is pursuant to LG’s published instructions, and (c) product is registered within 60 days of startup at www.lg.com
Manuals and Guides
- Parts: 5 Years Limited Warranty if unit is not registered / 10 Years Extended Warranty if unit is properly installed and registered
- Compressor: 7 Years Limited Warranty if unit is not registered / 10 Years Extended Warranty if unit is properly installed and registered
- Labor: None
The Standard Warranty Period and the Compressor Warranty Period are extended to a total of ten (10) years (the “Extended Warranty Period”) for qualified Systems that have been (a) installed by a party that has completed the Training Requirements, (b) installation is pursuant to LG’s published instructions, and (c) product is registered within 60 days of startup at www.lg.com
The standard warranty for this unit is for parts only, and does not cover labor or diagnostic services. Total Home Supply will handle all warranty parts requests for any mini split purchased from us, but installation and all troubleshooting for this unit must be performed by a licensed HVAC technician. Any fees the technician may charge are not reimbursable by the manufacturer or by Total Home Supply. Please call 877-847-0050 for more details or with any questions you may have regarding warranty information and installation of this unit.