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High capacity multi-split 4x1 air conditioning system LG, integrated by the outdoor Unit of 8.80 kW Mu5r30.u42, two interior units of 2.5 kW Ez09csn.csj1 and two units of 3.5 kW Ez12csn.csj1 of the Infinity series. Specifically conceived to replace ancient air conditioning systems without the need for reforms or works in housing, this set guarantees an excellent power using a single multitubre exterior chassis. Equipped with an BLDC Inverter Twin Rotary compressor and Ecological Refrigerant R32, it reaches an outstanding seasonal classification A +++ cold, a minimum sound comfort of 19 dB (A) and integrated Wi-Fi connectivity Thinq.
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Comprehensive climate renovation of high capacity without works. Outdoor Unit multitubaria 8.8 kW balanced symmetrically with two 2.5 kW splits and two 3.5 kW splits of the series LG Infinity.
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 symmetric combination of two 2,5 kW splits and two 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 MU5R30.U42 provides a unified solution and high mechanical performance to provide comprehensive air conditioning to single-family homes, large floors or professional offices. When connecting four indoor units to an outer multitubly high-capacity compressor - factory bent to manage up to a maximum of 5 independent rooms -, this set ensures exceptional power reserve. In this way, the thermal response is notably optimized when all the rooms demand refrigeration or heating at the same time, reducing the presence of external motors on terraces or architectural facades.
This kit presents an ideal and very balanced distribution, made up of two interior units of 2.5 kW (model EZ09CSN.CSJ1) and two units of greater flow rate of 3.5 kW (model EZ12CSN.CSJ1). This combination is excellent for real estate that have two rooms or shipments of normal dimensions (up to 20 m²) and two largest main stays, such as a dining room and a master bedroom or open concept kitchen (up to 30 m²). All the interior units belong to the range LG Infinity, designed under the innovative concept of a direct replacement of old equipment without the need for works or reforms. They emphasize by incorporating functions aimed at maximum comfort, such as a perfect self-cleaning system that maintains the dry exchanger automated and an ultrasilence function of just 19 dB (A).
In the Technical Section, the outdoor Unit it incorporates a BLDC Inverter Twin Rotary compressor of great seasonal performance, reinforced by an enhanced width fin exchanger and the battery with Ocean Black End coating, excellent protection against marine saline and corrosion. Thanks to the intelligent use of ecological refrigerant R32 and advanced control by pressure and temperature sensors, the set reaches an optimal seasonal energy classification A +++ in refrigeration (SEER 8.60). Finally, each indoor Unit it has integrated Wi-Fi connectivity to offer instant remote control through the official application LG Thinq.
Reference Outdoor Unit: MU5R30.U42 (Catalog Reference: MU5R30 U36A) LG EU MULTI 2026_2.PDF
Maximum connectable units: Up to 5 interior units
Nominal refrigeration capacity (min-nom-max): 1,32 / 8,80 / 10,60 kW
Nominal heat capacity (min-nom-max): 1,47 / 10,10 / 12,10 kW
Seasonal Season / Scop Performance: 8,60 W / W / 4,65 W / W
Energy classification (cold / heat): A +++ / A ++
Nominal consumption Cold (Lo-nom-Max): 0.30 / 2,33 / 3,34 kW
Nominal heat consumption (Lo-nom-Max): 0.28 / 2,21 / 2,89 kW
Flow of maximum outside air: 60 m³ / min
Exterior sound pressure (cold / heat): 49 dB (A) / 52 dB (A)
Compressor technology: BLDC Inverter Twin Rotary
Anti-corrosion protection Battery: 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 (2 units): Cold 2,50 kW (890-3700 W) / Heat 2,80 kW (890-4100 W) indoor LG Infinity.pdf
EZ12CSN.CSJ1 (2 units): 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
Comfort features: Self-cleaning and instructions for direct change without works
Wireless connectivity: Wi-Fi integrated as standard (LG Thinq)
Diameter Liquid connections (exterior): 6.35 mm (1/4 ") x 5 outputs
Diameter Gas connections (exterior): 9.52 mm (3/8 ") x 5 outputs
Maximum length of total pipe allowed: 75 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 MU5R30.U42 Equipped an intelligent dual rotary compressor capable of reducing its minimum refrigeration power up to 1.32 kW cold. If the user decides to activate only one indoor Unit Infinity of 2.5 kW, the electronics thoroughly regulates outer motor revolutions to strictly satisfy this low demand, avoiding inefficient oscillations and reducing consumption at indispensable minimum levels.
What are the guidelines for the balancing of R32 refrigerant in the installation?
The external block includes preloaded from the factory a volume of 2.50 kg of refrigerant gas R32, a quantity calculated to supply an accumulated total interconnection path of up to 45 meters (adding the lengths of the four independent lines used). In the event that the physical configuration of the work specifies higher distances, the authorized installer must add 20 grams of extra refrigerant for each additional meter, respecting the global maximum limit threshold of 75 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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