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High efficiency multi-split multi-efficiency air conditioning system LG, integrated by the outdoor Unit of 7,91 kW Mu4r27.u42, three interior units of 2.5 kW Ez09csn.csj1 and one indoor Unit of 3.5 kW Ez12csn.csj1 of the Infinity series. Designed specifically to replace ancient conditioned air without the need for complex works, this set optimizes the outer space using a single multitubaria engine. Equipped with an BLDC Inverter Twin Rotary compressor and R32 refrigerant, it offers an outstanding seasonal rating at +++ cold, an ultrasilencious operation of 19 dB (A) in silent mode and integrated Wi-Fi connectivity with support Thinq.
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Climate renovation without works and tailored with technology LG. . Outdoor Unit 7.9 kW multitubaria unified with three 2.5 kW splits and a 3.5 kW split of the Infinity range.
Due to the multiple mechanical combinations, simultaneous powers and different lengths and cufflode tubing lengths that require multi-split 4x1 installations, we carry out custom quotes with all the necessary material for his work. To ensure a perfect hydraulic dimensioning, verify the thermal simultaneity of the compressor and determine if its installation requires optional accessories or a specific balance of refrigerant gas, our engineering department exhaustively studies each request.
Indicate the square meters and the orientation of the four stays to validate that the combination of three 2,5 kW splits and one of 3.5 kW covers the actual thermal load of its space.
Specify the approximate lengths of pipe from the outdoor Unit each split to calculate the additional load of R32 gas necessary on site.
📩 Facilitate this data and our technical team will send you a complete breakdown with all the necessary material for your installation.
The system LG Multi inverter 4x1 equipped with the outdoor Unit MU4R27.U42 offers a sophisticated and high energy efficiency alternative to heat up simultaneously up to four independent stays in homes or commercial premises. By centralizing the climate demand of the four interior spaces in a single multitubaria outer compressor, the terraces, balconies or covered assembly space is optimally optimized. This noble mitigates the architectural visual impact on the outer facade and unifies the general power lines, avoiding the accumulation of 1x1-type engines.
This advanced configuration combines staggered three internal units of 2.5 kW (model EZ09CSN.CSJ1) with a higher performance unit of 3.5 kW (model EZ12CSN.CSJ1). This distribution of capabilities is suitable for properties that have three standard-size stays (such as secondary bedrooms or offices of up to 20 m²) and a main area of greater dimensions that requires a superior thermal flow rate (such as a living room, dining room or kitchen Diaphanous of up to 30 m²). All installation uses splits from the series LG Infinity, designed under a concept of direct replacement without the need for annoying reforms at home. In addition, premium functions as a perfect self-cleaning to keep the exchanger dry and prevent bacteria and an ultrasilence operation of only 19 dB (A).
In the Technical Section, the outdoor Unit incorporates a High Strength Twin Rotary BLDC Inverter compressor, reinforced with first level technologies as an enhanced width fin exchanger and a battery with Ocean Black End anti-corrosive coating, suitable for prolonging durability against Saline environments and urban pollution. Operating under ecological gas R32 and assisted by advanced pressure and temperature sensors, the set reaches an excellent seasonal energy rating at +++ in refrigeration (SEE 8,50). The system also has integrated Wi-Fi connectivity in each indoor Unit, making it possible an intelligent control through the application LG Thinq.
Reference Outdoor Unit: MU4R27.U42 (Catalog Reference: MU4R27 U24A) LG EU MULTI 2026_2.PDF
Maximum connectable units: Up to 4 interior units
Nominal refrigeration capacity (min-nom-max): 1,06 / 7,91 / 9.00 kW
Nominal heat capacity (min-nom-max): 1,17 / 8,60 / 10.00 kW
Seasonal Season / Scop Performance: 8,50 W / W / 4,61 W / W
Energy classification (cold / heat): A +++ / A ++
Nominal consumption Cold (Lo-nom-Max): 0.29 / 1,85 / 3,44 kW
Nominal heat consumption (Lo-nom-Max): 0.28 / 1,92 / 2,54 kW
Flow of maximum outside air: 50 m³ / min
Exterior sound pressure (cold / heat): 48 dB (A) / 51 dB (A)
Compressor technology: BLDC Inverter Twin Rotary
External battery protection: Ocean Black End
External dimensions (an. X al. X prof.): 950 x 834 x 330 mm
Net weight Outdoor Unit: 61.50 kg
EZ09CSN.CSJ1 (3 units): Cold 2,50 kW (890-3700 W) / Heat 2,80 kW (890-4100 W) indoor LG Infinity.pdf
EZ12CSN.CSJ1 (1 unit): Cold 3.50 kW (890-4040 W) / Heat 3.71 kW (890-5100 W) indoor LG Infinity.pdf
Sound pressure in refrigeration (S / L / M / H): 45/41/35/27/19 dB (A) (Both models)
Sound pressure in heating (L / M / H): 45/41/35/27 dB (A)
Net Dimensions Splits (an. X al. X prof.): 837 x 308 x 189 mm (both models)
Net weight Indoor Unit (EZ09 / EZ12): 8.6 kg / 8.6 kg
Special features: Perfect self-cleaning and 10 years warranty in compressor
Remote connectivity: Wi-Fi integrated as standard (LG Thinq)
Liquid pipe diameter / gas (per line): 1/4 "(6.35 mm) / 3/8" (9.52 mm)
Maximum length of total pipe allowed: 70 meters
Maximum length by branch refrigerator: 25 meters
Little maximum admissible rate (exterior / interior): 15 meters
Eve maximum difference between indoor units: 7.5 meters
Pre-filled length of factory: 45 meters
Amount of Refrigerant Gas of Preload (R32): 2.50 kg
Additional gas load (> 45m): 20 g / m
How do you manage the compressor invert the power when there is only one split on?
The outdoor Unit LG MU4R27.U42 incorporates an intelligent dual rotary compressor capable of decreasing its minimum refrigeration power up to 1.06 kW. If the user decides to light only one indoor Unit Infinity of 2.5 kW, the electronics adapts with absolute precision the engine revolutions to strictly comply with that low demand, preventing abrupt electrical oscillations and reducing consumption at indispensable minimum levels.
What are the guidelines for the balancing of R32 refrigerant in the installation?
The outer block includes preloaded from the factory a volume of 2.50 kg of refrigerant gas R32, a quantity calculated to supply a total accumulated interconnection path of up to 45 meters (adding the lengths of the four independent lines). In the event that the physical configuration of the work requires higher distances, the qualified installer must add 20 grams of extra refrigerant for each additional meter, respecting the global maximum limit threshold of 70 meters.
On https://tualmacendelclima.com/en/ we are specialist engineers in technical design, control and optimization of multi-split air conditioning networks and advanced zoning. If you need to solve doubts about simultaneity coefficients, maximum slopes or check the official performance specifications of the range LG, our engineering department is at your entire disposal.
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