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  LG LMU540HV Multi F Max 54,000 BTU Inverter System Compressor for 2 - 8 Indoor Units

LG Multi F Max 54,000 BTU Inverter System for 2 - 8 Indoor Units
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Due to the complexity of configurations available with the LMU540HV, please contact Customer Service at 1-877-847-0050 to order this system.
Outdoor Unit Only $2,788.00

Product Code: LG-LMU540HV

Description Technical Specs Manuals & Guides
The LG LMU540HV Multi F Max Inverter Multi Zone 54,000 BTU Mini Split System with Heat Pump for 2 to 8 Indoor Units.

With LG's new Multi F Max Mini Split Heat Pump System, you can connect and operate up to 8 interior units giving you all of the advantages of central air for 8 rooms without any duct work. This innovative system is perfect for offices, retail establishments, new homes, renovations and retrofitting older homes.

Below is an installation example. With the Multi F Max 54,000 BTU unit, you can supply anywhere from 2 to 8 rooms with their own climate control. The photo below illustrates an example of a 6 zone installation. This installation requires one outdoor unit (LMU540HV), a Y connector/branch, and two branch distribution boxes. The indoor units shown include 1 ceiling cassette, 2 standard high wall units, a mirrored art cool unit and 2 ducted concealed ceiling unit. Although neither the Art Cool Gallery Unit nor the Vertical Air Handler Unit are pictured below, each is available in 2 different sizes and available for use with the LMU540HV compressor. Of course, with the help of our sales staff, you can customize your indoor units to your requirements.

Each indoor unit has its own remote control, so each room can be set to different temperatures. The individual units are connected to a single exterior unit by way of 2 branch distribution boxes.

There are three branch distribution boxes available to help customize your installation. All are rated for a maximum of 36,000 BTUs. Each branch distribution unit is specific to the number of indoor units you will be using. There is a 2 unit (PMBD3620), a 3 unit (PMBD3630), a 4 unit (PMBD3640) and a 4 unit with one integral 36k unit adaptor (PMBD3641) branch distribution box. 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.


When installing two branch distribution units, you will also need to install a "Y branch" (PMBL5620) to the line set to one of the branch distribution units.

The LMU540HV is rated at 54,000 BTUs and can be connected to almost any combination of indoor units up to 8, totaling 73,000 BTUs (max.). The unit must be connected to a minimum of 2 units with a combined BTU rating of 24,000 BTUs.

Standard Wall Unit

LMN097HVT (9,000 BTUs)

LMN127HVT (12,000 BTUs)

LMN187HVT (18,000 BTUs)

Art Cool Wall Unit

LMAN097HVT (9,000 BTUs)

LMAN127HVT (12,000 BTUs)

LMAN187HVT (18,000 BTUs)

Art Cool Gallery Unit

LMN097HVP (9,000 BTUs)

LMN127HVT (11,200 BTUs)

Ceiling Cassette Unit

LMCN125HV (12,000 BTUs)

LMCN185HV (18,000 BTUs)

Ceiling Concealed Low Static Unit

LMDN095HV (9,000 BTUs)

LMDN125HV (12,000 BTUs)

LMDN185HV (18,000 BTUs)

High Static Ducted Ceiling Unit

LMHN240HV (24,000 BTUs)
LMHN360HV (36,000 BTUs)
Vertical Air Handler Unit

LMVN240HV (24,000 BTUs)

LMVN360HV (36,000 BTUs)

Standard features of the indoor unit include inverter technology, auto operation and auto restart. You can customize each room by choosing the indoor unit with the look you want. To view the individual features of the each of the indoor units, please follow the links by clicking the type of unit you are interested in.

Inverter Technology: inverter heat pump air conditioners use a variable speed compressor, rather than the constant speed found in conventional ACs. Instead of shutting off once the temperature is achieved, the inverter compressor continues to operate at a low speed to maintain the temperature. It is quieter to operate and uses less energy than conventional air conditioners.

Auto Operation (Artificial Intelligence): Provides three levels of comfort from which to choose. Temperature and fan speed will set automatically.

Auto Restart Operation: Automatically restarts a unit to programmed setting when the electricity comes on after a power failure.

Each interior unit will include all installation hardware needed, a controller, batteries (if needed), holder and holder hardware (if needed).

Because of the complexity of the components required for this system. this system is only available by contacting our Custer Service Department. 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.
  • Inverter variable speed compressor on outdoor unit for energy saving operation
  • Defrost/De-icing capabilities
  • Restart delay of three minutes
  • Self diagnosis capabilities
  • Soft start reduces power surges to electrical systems
  • Auto operation and auto restart operation
  • Operates down to 14F in cooling mode
  • R410A refrigerant

Other optional accessories are available to help control conditions when used in a commercial application. These include:
  • Remote Temperature Sensor (PQRSTA0)
  • Dry Contact Unit with 1 contact point - 24 VAC external power (PQDSB1)
  • Dry Contact Unit with 2 inputs - power from indoor unit (PQDSBC)
  • Dry Contact Unit for third party thermostat (PQDSBNGCM1)

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