Danfoss MLZ scroll compressor (medium temperature)
Danfoss MLZ hermetic scroll compressor for medium temperature refrigeration: cold rooms, display cases and condensing units. Three models from 3 to 5 HP, 4.7 to 8.4 kW with R404A, in 230 V single-phase or 400 V three-phase. Choose your model below to see its specifications.
Danfoss MLZ hermetic scroll compressors are designed for medium temperature refrigeration: cold rooms, display cases, condensing units and small racks. They run on today’s refrigerants, including low-GWP HFO blends, with POE oil. Three models, from 3 to 5 HP, cover 4.7 to 8.4 kW with R404A, in 230 V single-phase or 400 V three-phase.
The three MLZ models
| Model | Danfoss ref. | HP | Supply | R404A | R448A | R134a | Power input | Swept volume | Suction / discharge | Weight |
|---|---|---|---|---|---|---|---|---|---|---|
| MLZ021 | 121L8635 | 3 | 230 V 1-ph | 4.7 kW | 4.4 kW | 2.7 kW | 2.27 kW | 46.2 cm³ | 3/4 / 1/2 in | 31 kg |
| MLZ030 | 121L8641 | 4 | 400 V 3-ph | 7.1 kW | 6.6 kW | 4.0 kW | 3.35 kW | 68.8 cm³ | 7/8 / 1/2 in | 37 kg |
| MLZ038 | 121L8646 | 5 | 230 V 1-ph | 8.4 kW | 7.8 kW | 4.7 kW | 3.86 kW | 81.0 cm³ | 7/8 / 1/2 in | 37 kg |
Danfoss capacities at EN 12900 conditions: evaporating −10 °C, condensing 45 °C, return gas 20 °C, no subcooling (R134a: 10 K superheat). Danfoss publishes these values for the 400 V three-phase motor. HP = Danfoss nominal horsepower.
Key benefits
- Scroll technology: continuous compression with few moving parts, for smooth and quiet operation.
- Refrigerants: R404A, R507, R134a, R407A, R407F, R448A, R449A, R452A and R513A.
- Solder connections on suction and discharge; factory-charged 215PZ POE oil.
- Proven: it is the compressor of the Danfoss Optyma Slim Pack medium temperature units.
See also our LLZ (low temperature) scroll compressors and our Performer SZ (air conditioning and chillers) scroll compressors.
Afric Froid, your Danfoss supplier
Afric Froid supplies Danfoss MLZ scroll compressors, installs them and provides after-sales service in Tunisia, Algeria, Senegal and Ivory Coast. Tell us the refrigerant, capacity, temperatures and available voltage: we will choose the right model and send you a quote.
| Model | MLZ021 – 4.7 kW (R404A) – 3 HP – 230 V 1-ph, MLZ030 – 7.1 kW (R404A) – 4 HP – 400 V 3-ph, MLZ038 – 8.4 kW (R404A) – 5 HP – 230 V 1-ph |
|---|
Official Danfoss document for MLZ compressors, always in its latest version:
- MLZ application guidelines (PDF, 4.9 MB): specifications, capacities, operating envelopes, wiring, dimensions and codes.
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Danfoss LLZ scroll compressor (low temperature)
Bock compressor
Bock compressors are semi-hermetic reciprocating models, available in 2- to 8-cylinder versions and covering a wide range of cooling capacities for commercial and industrial applications. Their design includes high-performance valve plates mexxFlow (from HG66 upwards), reliable lubrication regardless of the direction of rotation and advanced electronic motor protection. Compact, robust and modular, they deliver high energy efficiency and easy maintenance.
Seven series and 49 models (standard and S versions with a more powerful motor), from 2.8 to 165 kW with R404A and 3 to 128 hp. Choose your series:










