LG LMU540HV Multi F MAX Inverter Heat Pump Outdoor Unit 52,500 Btu/h

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Package Weight:
236.00 LBS

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LG LMU540HV Multi F MAX Inverter Heat Pump Outdoor Unit 52,500 Btu/h

Auto operation

Auto restart operation


Inverter (variable speed compressor)

Low ambient operation to 14°F (cooling mode)

Restart delay (3-minutes)

Self diagnosis

Soft start

Up to 8 Zones, 2 Zones required


  • Heat Pump Outdoor Unit
  • Type Multi-Zone, Inverter
  • Voltage Rating 208 to 230 Volt AC
  • Current Rating 24.76 Amp (Cooling/Heating), 18.5 Amp (Compressor), 1.46 Amp (Fan), 29.4 Amp (Minimum Circuit), 40 Amp (Maximum Overcurrent)
  • Frequency Rating 60 Hertz
  • Number of Phases 1
  • Power Rating 5.1 Kilowatt (Cooling), 5.4 Kilowatt (Heating)
  • Cooling Capacity 52500 BTU/Hour
  • Operating Temperature 14 to 118 Deg F (Cooling), -4 to 64 Deg F (Heating)
  • Size 37-13/32 Inch Width × 13 Inch Depth x 54-11/32 Inch Height
  • Weight 214 Pound
  • Approval UL, ETL (Canada and US), AHRI, ANAB
  • Refrigerant Type R-410A
  • Heating Capacity 58000 BTU/Hour
  • Energy Efficiency Ratio 15.8 SEER/10.0 EER (Cooling), 8.3 HSPF (Heating)
  • Airflow Rating 2119 CFM
  • Sound Level 54/56 Decibel (Cooling/Heating)
  • Fan Type Propeller
  • Refrigerant Line Size 3/8 Inch Outer Diameter (Liquid), 3/4 Inch Outer Diameter (Vapor)
  • Auto Operation
  • Auto Restart
  • Defrost/Deicing
  • Low Ambient Operation to 14 Deg F Cooling Mode
  • Self Diagnosis
  • Soft Start
  • Factory Installed Drain Pan Heater
  • Restart Delay 3 Minutes
  • The Minimum Number of Connected and Operating Indoor Units to Multi F/Multi F Max Systems is Two, Taking into Consideration the Minimum Combination Ratio
  • If Installing the Outdoor Unit on the Roof, Check the Strength of the Roof
  • Concrete Foundations Must be Made of One Part Cement, Two Parts Sand, and Four Parts Gravel
  • Include an Area for Drainage Around the Foundation to Ensure Condensate Thoroughly Drains Away from the Outdoor Unit
  • Energy Star® Rated

Safety Information

California Proposition 65 Warning SymbolWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
This product and other products on our site may contain a chemical known to the state of California to cause cancer or birth defects or other reproductive harm. Visit the state of California's website to learn more about Proposition 65.

Many of our items should be installed by a trained HVAC technician. With purchase of this item, you are agreeing to follow any and all safety guidelines provided by the manufacturer and to have the item installed by a trained HVAC technician as necessary. Your professional installer assumes all responsibility for injury or property damage that may result.

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Warranty & Returns

The items we offer on our website are professional grade products that are designed and built to be installed by licensed, professional tradesmen. Because of the professional install these products carry a longer warranty, different than found in similar products offered by big box stores for do it yourselfers. We encourage you to be a licensed HVAC contractor or to hire a Licensed HVAC contractor to be sure you can truly get the manufacturer's warranty. Many manufacturers will request a copy of the contractor license or a bill of install to start the warranty procedure. HVAC Wholesale Direct is a distributor and is not responsible for labor claims, supplies or refrigerant cost recovery or rejected manufacturer's warranty due to misapplication or for operating outside the terms of a manufacturer's warranty.

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30-Day Hassle-Free Return Policy
After 30 days, we will still accept returns but with a 15% Restocking Fee for up to 90 Days

Return terms and conditions: Item(s) must be new and unused in the original packaging with all original documentation included.

Upon receipt of the returned item(s) an inspection will be performed to ensure the above terms and conditions have been met.
If they have, we will issue a refund back to the original method of payment used at time of sale, less our original cost of shipping. If the terms and conditions have not been met, we will contact you to arrange for the items to be returned to you at your expense.

You are responsible for return shipping costs.
We recommend you insure the shipment against loss or damage. Any return shipping damage claims will be your responsibility.

Return Instructions - Non Damage Items

You must ...

  • Request a return via our Contact Us link
  • Include your order / invoice number
  • Provide a reason for your return request
  • State if you want a replacement or a refund

Once we receive your request, we will respond with either an authorization to return, or deny the request with an explanation. If the request is authorized, we will also provide instructions on how and where to return the purchase. Upon receipt of the item(s) back, an inspection will be performed to determine if the item(s) can be returned to the shelf or not. If they can, we will comply with your request for a replacement item(s) or a refund. Refunds will always be issued back to the method of payment used for the original purchase. If the item(s) can not be returned to the shelf for resale, they will be returned to you at your expense.

Items Damaged During Shipment

Occasionally, items are damaged in shipment. It is the buyer's responsibility to inspect for damage upon receipt from the shipping / delivery company. It's best to refuse the delivery and notate the damage on the driver's bill. It's always best to take a picture and let us know, so we can make arrangements to get you a replacement as quickly as possible. Once you accept the shipment, any damage claims at that time are between the delivery company and the buyer. We inspect every item / shipment for damage prior to tendering the items to the delivery company.

Defective Items

If your reason for returning the item in the instructions above is due to a manufacturer defect, you must state that in your return request, as it will affect the instructions for returning the item. Many manufacturers have specific procedures that must be followed in order to process these claims. A detailed description of the defect must be provided. You may be asked to provide additional information such as, a service ticket showing the diagnosis from a licensed HVAC professional, pictures of the defect, etc. These additional pieces of information will help to expedite the process in many cases. Some manufacturers will not proceed without that additional information.

HVAC Wholesale Direct vendor network is made up of some of the finest manufactures of HVAC products. We will be here to assist you. We however, do not have any control over the manufacturers and their warranty practices and make no claim on honoring warranty on behalf of any manufacturer. HVAC Wholesale Direct is not responsible for shipping or freight charges for any warranty claims made that we are helping to facilitate. We issue credit after we receive credit from the manufacturer.

Electrical Parts

Electrical parts, such as capacitors, contactors, transformers, and thermostats are NON-RETURNABLE. HVAC Wholesale Direct is not liable for improper selection and/or installation of electrical parts and controls.

At the end of the day we are people doing business with people in a modern environment. We want you to be happy with your experience with our company. We promise to work with all of our customers, within good reason, to resolve any conflicts, whether defective or mis-ordered to your satisfaction.

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Multi-Zone, Inverter
Voltage Rating:
208 to 230 Volt AC
Current Rating:
24.76 Amp (Cooling/Heating), 18.5 Amp (Compressor), 1.46 Amp (Fan), 29.4 Amp (Minimum Circuit), 40 Amp (Maximum Overcurrent)
Frequency Rating:
60 Hertz
Number of Phases:
Power Rating:
5.1 Kilowatt (Cooling), 5.4 Kilowatt (Heating)
Cooling Capacity:
52500 BTU/Hour
Operating Temperature:
14 to 118 Deg F (Cooling), -4 to 64 Deg F (Heating)
37-13/32 Inch Width × 13 Inch Depth x 54-11/32 Inch Height
214 Pound
UL, ETL (Canada and US), AHRI, ANAB
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