Rittal SK Blue E+ 4200W Wall-Mounted Cooling Unit

The Rittal SK Blue e+ 4.2 kW wall-mounted cooling unit delivers powerful and energy-efficient climate control for large industrial enclosures. Designed for demanding environments, it operates on 380–480 V, 3-phase, 50/60 Hz power and ensures consistent temperature regulation.

Thanks to innovative heat pipe technology and speed-regulated components, this model can achieve average energy savings of up to 75%. As a result, operating costs are significantly reduced while maintaining excellent cooling performance.

Moreover, the integrated e+ controller continuously adjusts performance based on actual cooling demand. Consequently, the unit improves system reliability and extends the lifespan of sensitive electrical components.

Available in sheet steel (RAL 7035) and stainless steel versions, the Blue e+ series is suitable for both standard industrial and harsh environmental applications.

Key Benefits

• Up to 75% energy savings with hybrid heat pipe technology

• High SEER value of 8.1 for superior seasonal efficiency

• Integrated electric condensate evaporation

• Hydrophobic RiNano-coated condenser for longer service life

• Compatible with Blue e+ IoT Interface (Model 3124.300) for remote monitoring

• Wide operating temperature range: -20°C to +60°C

• UL Type 3R/12 and IP55 internal protection

Technical Specifications

General Information

• Article Number: SK 3188.940

• Cooling Output (L35 L35 / 50–60 Hz): 4.2 kW

• Cooling Output (L35 L50): 3.02 kW

• Rated Voltage: 380–480 V, 3~, 50/60 Hz

• Rated Power Input: 1.3 kW

• Material: Sheet steel

• Colour: RAL 7035

• Design: Wall-mounted

Energy Efficiency

• EER (50/60 Hz): 3.46

• SEER: 8.1

• Power Consumption (L35 L35): 1.21 kW

• Power Consumption (L35 L50): 1.28 kW

Because of the high EER and SEER ratings, this unit ensures optimized energy usage throughout the year.

Airflow Performance

• External Circuit Airflow: 2,300 m³/h

• Internal Circuit Airflow: 2,300 m³/h

This balanced airflow improves heat dissipation and maintains uniform internal temperatures.

Dimensions & Installation

• Width: 450 mm

• Height: 1,600 mm

• Depth: 393 mm

• Required Cut-out (W x H): 433 mm x 1,579 mm

• Weight: 72.4 kg

Please follow the official mounting instructions to ensure proper installation and optimal performance.

Refrigerant Details

• Refrigerant: R134a

• Quantity: 1.75 kg

• GWP: 1,430

• CO₂ Equivalent: 2.5 t

• Maximum Operating Pressure: 24 bar

Operating Conditions

• Operating Temperature Range: -20°C to +60°C

• Heat Pipe Range: -20°C to +45°C

• Refrigerant Circuit (Active): 3°C to 60°C

• Setting Range: 20°C to 50°C

• Protection Category: IP55 (internal), UL Type 3R/12