R4E355-AK05-05 ebm-papst: Robust HVAC Performance
The R4E355-AK05-05 is a powerful 355mm centrifugal fan designed for demanding HVAC and industrial ventilation tasks. It utilizes a backward-curved impeller, directly driven by an ebm-papst external rotor motor. This configuration eliminates the need for belts or pulleys, resulting in a compact, maintenance-free unit. The geometry of the backward-curved blades allows this fan to generate high static pressure, making it perfect for pushing air through HEPA filters, heat recovery wheels, or long duct runs in commercial buildings and industrial plants.
Key Technical Characteristics
- Impeller Size: 355 mm.
- Supply Voltage: 230 VAC (Single-phase).
- Motor: M4E074-DF (Robust 4-pole motor).
- Blade Material: Often Aluminum or PA6 composite.
- Insulation Class: Class F (High heat tolerance).
- Bearings: Ball bearings (sealed for life).
Engineering Field Guide
Lifecycle State: Active. Widely used in Clean Room units and Roof Extractors. Diagnosis & Troubleshooting: Check the thermal overload protector (TOP) leads (usually white) if the motor cuts out. This motor is protected against overheating. If it trips, verify that the ambient temperature is within limits (-25 to +60°C). Installation Tips: The performance of the R4E355 depends heavily on the «Inlet Cone». Ensure the overlap distance matches the datasheet (usually 1-2% of diameter) to prevent flow separation. Compatibility: This fan integrates seamlessly with Siemens TIA Portal logic. By using a 0-10V signal converter to a voltage regulator, airflow can be modulated precisely to maintain constant pressure in ducts, a common requirement in VAV (Variable Air Volume) systems.
| Feature | Technical Specification |
|---|---|
| Nominal Speed | 1400 RPM |
| Airflow | 2500 – 2800 m³/h |
| Power Input | 160 – 200 W |
| Current Draw | 0.7 – 0.9 A |
Maintenance Note
Unlike belt-driven fans, there are no belts to tighten. The only maintenance required is cleaning the impeller to maintain balance and cooling efficiency for the motor hub.
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