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Multi Split 4x1 Premium Air conditioning system LG, integrated by the outdoor Unit of 7,91 kW Mu4r27.u42 and four interior mural units of 2.5 kW Ez09csn.csj1 of the innovative Infinity series. Designed specifically to replace ancient equipment without the need for complex works, this set allows to condition symmetrically up to four independent stays using a single exterior engine. Its advanced compressor and R32 refrigerant guarantee an outstanding seasonal efficiency at +++ cold, excellent sound pressure of only 19 dB (A) in silent mode and Wi-Fi connectivity standard with ThinQ technology.
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Climate renovation without works with technology LG. . Outdoor Unit multitubaria of 7.9 kW combined symmetrically with four INFINITY interior units with ThinQ serial connectivity.
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 rooms to validate that the Infinity Splits of 2.5 kW cover the actual thermal load of your project.
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 with the outdoor Unit MU4R27.U42 offers a centralized and technologically very advanced solution to performed simultaneously up to four independent stays in homes or commercial premises. By unifying the air conditioning demand of the four interior spaces in a single multitubaria outer compressor, the mounting space on balconies, roofs or terraces is optimally optimized, while significantly reduced the aesthetic impact in the Exterior facade and the general electric interconnection lines are simplified.
This set emphasizes especially by incorporating four interior units of the series LG Infinity (model EZ09CSN.CSJ1), with a nominal refrigeration capacity of 2.5 kW for each split. Designed under the concept of a direct replacement of ancient air conditioning equipment without the need to carry out reforms or annoying works at home, these splits offer a modern and balanced design, ideal for bedrooms, studio rooms or small rooms of up to 20 m². The Infinity range incorporates advanced functions of comfort, such as a perfect self-cleaning system that avoids the proliferation of moisture and impurities in the exchanger and exceptionally silent operation of only 19 dB (a) thanks to the balance of its engine.
In the Technical Section, the outdoor Unit incorporates a high efficiency Twin BLDC Inverter compressor, reinforced with exclusive technologies as an enhanced width fin exchanger and a battery with Ocean Black End anti-corrosive coating, which exponentially prolongs the useful life of the team against saline and external chemical agents. Operating under Ecological Refrigerant R32 and with the accuracy of integrated pressure and temperature sensors, the system reaches an exceptional energy classification to +++ in refrigeration (SEER 8.50). The ecosystem is completely integrated remotely through Wi-Fi standard by using Thinq application LG for total intelligent management.
Reference Outdoor Unit: MU4R27.U42 (Official catalog: MU4R27 U24A) LG EU MULTI 2026.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
Reference Indoor Unit: EZ09CSN.CSJ1 (multi internal technology sheet LG.pf / interiors LG Infinity)
Refrigerator capacity LA NOM / MAX (Split): 890/2500/3700 W
Calorific capacity LA NOM / MAX (Split): 890/2800 / 4100 W
Sound pressure in refrigeration (S / L / M / H): 45/41/35/27/19 dB (A)
Sound pressure in heating (L / M / H): 45/41/35/27 dB (A)
Dimensions Net Split (an. X al. X prof.): 837 x 308 x 189 mm
Net weight Indoor Unit: 8.6 kg
Special guarantee: 10 years warranty in the compressor
Remote connectivity: Wi-Fi integrated as standard (LG Thinq)
Liquid pipe diameter / gas (split): 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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