Overview

This document provides comprehensive technical information on Rosenberg Ventilatoren GmbH's axial fans and industrial fan models (AKBD, AKBE, AKSD, AKSE, AKAD, AKS series) designed for cooling, air handling, HVAC, and refrigeration applications. It covers fan design, motor specifications, performance data, noise levels, construction details, wiring, and installation guidelines.

1. Fan Design and Construction

• Blade Design: Sickle-shaped axial fan blades optimized for noise reduction and airflow efficiency. Materials vary by size: steel (sizes 350, 450), aluminum (450N to 630), and profiled cast aluminum (710 to 1000).
• Motors: 100% speed-controllable external rotor motors with IP54 protection and insulation class F. Available in single-phase or three-phase AC, with 1 to 3 speeds, thermal contacts for protection, and lubricated bearings for -30°C to 70°C operation (optional lubricants for -50°C).
• Guard and Mounting: Protective guards for finger safety and customizable inlet ring dimensions for mounting.

2. Performance and Testing

• Performance Curves: Tested per DIN 24163 with air density 1.2 kg/m³, using inlet cone in airflow direction A without guard.
• Noise Levels: A-weighted sound power levels (LWA5) measured per DIN 45635 part 2. Sound pressure at 1 m estimated by subtracting 7 dB(A) from sound power level.

3. Options and Customization

• Available options include various voltages/frequencies, extended cables, low-temperature lubricants (-50°C), and special paint finishes.

4. Fan Selection Guidelines

• Selection based on required air volume, static pressure, noise characteristics, and system resistance curves (which vary with the square of air volume).
• Operating point determination must consider system components like cooling elements.

5. Reference Code and Nomenclature

• Detailed coding system describing fan series, motor type, size, pole number, blade angle, terminal box or cable lead-out, and construction types.
• Legend explains parameters such as motor power (P1), rated current (IN), capacitor presence, max air temperature, static pressure (pfa), current limits, starting current ratio, protection class, wiring diagrams, weight, control options, motor protection switches, and noise levels.

6. Critical Technical Parameters and Limitations

• Motors rated for -30°C to 70°C air temperature; optional lubricants for -50°C.
• IP54 protection with labyrinth sealing ensures durability in typical industrial environments.
• Noise optimization targets main operating range balancing sound reduction and aerodynamic efficiency.

7. Best Practices and Recommendations

• Evaluate system resistance carefully to ensure correct operating point and avoid performance loss.
• Provide detailed inlet ring dimensions when ordering for proper fit.
• Consider optional features like extended cables or special finishes for specific environments.

8. Technical Data and Parameters for AKSE and AKSD Fan Models

• Airflow Capacity: Approximately 500 to 25,000 m³/h (250 to 14,000 CFM).
• Pressure Differential: 0 to ~1100 Pa (0 to 4.5 in.WG).
• Voltage Ratings: Wide range including 105V to 450V, standard frequency 50 Hz.
• Noise Levels: 55 to 88 dB(A) depending on model and conditions.
• Motor Types: Various types (RE, RSE, MSE, RTD, MSD, RTE) with power from 0.2 kW to 4 kW and currents from 0.1 A to 4.7 A.
• Protection Class: IP54 for all models.
• Construction Forms: Numbered 1 to 6 with airflow direction labels (A or V).

9. Performance Curves and Graphical Data

• Graphs plot airflow vs. static pressure, showing operating ranges and efficiency points.
• Noise levels increase with airflow and pressure.
• Voltage affects motor current and power consumption.

10. Electrical Wiring and Motor Control

• Wiring diagrams for single-phase and three-phase motors with thermal contacts.
• Instructions for reversing motor rotation by swapping two phases.
• Control options include 5-step transformer regulation, continuous transformer regulation, and electronic speed control.
• Motor protection switches recommended for electrical fault prevention.

11. Mechanical Dimensions and Installation

• Detailed dimensions for motors and fans including mounting hole sizes, weights (2.5 kg to over 60 kg), and construction-specific components like inlet plates and mounting flanges.
• Airflow direction must be verified for correct installation.

12. Summary Tables of Key Models

13. Critical Recommendations

• Match motor voltage and connection type to power supply.
• Maintain operating pressure within specified limits for longevity.
• Verify airflow direction and construction form during installation.
• Consider noise levels for compliance with workplace regulations.
• IP54 rating suitable for dusty and splash-prone environments but not fully wet or highly dusty conditions.

14. Wiring and Motor Operation Notes

• Thermal contacts must be wired correctly, especially with RE controllers.
• Rotation reversal possible by swapping two phases in three-phase motors.
• Motors marked with an asterisk require terminal boxes.

15. Conclusion

This document is a detailed technical reference for selecting, installing, and operating Rosenberg axial and industrial fans and motors. It provides essential data on performance, electrical characteristics, noise, mechanical dimensions, wiring, and operational limits to support engineering decisions in HVAC, refrigeration, and industrial ventilation systems.