D4E146-AA01-01: The Quiet Ventilation Solution
The D4E146-AA01-01 is a specialized double-inlet centrifugal blower from ebm-papst designed for noise-sensitive applications. Unlike the high-speed D2E series, this «D4E» model utilizes a **4-pole single-phase AC motor**, which operates at a lower rotational speed (approximately 1300-1400 RPM). This lower speed significantly reduces acoustic noise and mechanical vibration while still delivering a consistent volume of air. It is the ideal component for office air conditioning units, residential heat recovery ventilation (HRV), and laboratory fume hoods where silence is a key operational requirement.
Technical Specifications
- Impeller Diameter: 146 mm.
- Motor Poles: 4-Pole (Low Speed).
- Voltage: 230 VAC (50/60 Hz).
- Housing: Galvanized Sheet Steel Scroll.
- Impeller Type: Forward Curved (Sirocco).
- Capacitor: Required (Check label, typically 3-4 µF).
Lifecycle & Maintenance Diagnosis
Lifecycle State: Active. Diagnosis: The 4-pole motor runs cooler and stresses the bearings less than 2-pole versions, leading to a long service life. However, if the fan runs slower than rated or hums, the permanent split capacitor (PSC) is the likely culprit. A degraded capacitor reduces torque, causing the motor to slip and overheat. Installation Advice: Because it moves air at lower velocity, duct resistance must be minimized. Ensure the dual inlets have at least 50mm clearance from the plenum walls to prevent «starving» the fan, which causes cavitation noise. Compatibility: Fully compatible with Siemens Desigo room controllers. The low-speed winding allows for excellent speed modulation via transformer-based controllers or phase-angle regulators for fine-tuning airflow in VAV zones.
| Metric | Performance Data |
|---|---|
| Nominal Speed | 1380 RPM |
| Airflow | 600 – 800 m³/h |
| Power Input | 110 W |
| Noise Level | < 55 dB(A) (Low) |
Why choose D4E over D2E?
Choose the D4E146 when acoustic comfort is prioritized over maximum static pressure. It provides a gentler, quieter airflow suitable for occupied spaces.
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