D2E146-AP47-02: The Industrial Extraction Standard
The D2E146-AP47-02 is one of the most widely used double-inlet centrifugal blowers in the industrial and commercial sector. With a 146mm diameter forward-curved impeller, this «AP» variant is engineered for high-power applications, often found in commercial kitchen extraction hoods, fan coil units, and clean room filter modules. The dual-inlet scroll housing is made of galvanized sheet steel, providing a durable and rigid structure that directs the high-velocity air efficiently through the outlet flange. The external rotor motor is precisely balanced with the impeller to minimize vibration, a critical factor for ceiling-mounted equipment.
Key Technical Characteristics
- Impeller Size: 146 mm.
- Voltage: 230 VAC (Single-phase).
- Motor Type: M2E068-EC (High Torque).
- Wattage: Approx. 300 W (High output).
- Speed: 4-Speed or Single Speed depending on wiring (check diagram).
- Protection: IP44 (Motor).
Maintenance & Troubleshooting Guide
Lifecycle State: Active. Diagnosis: Vibration is the enemy of the D2E146. Because it uses a «Sirocco» (multivane) impeller, grease and dust buildup on the many small blades can cause severe imbalance. Maintenance teams should clean the impeller annually. If the motor is dead, check the thermal protector leads (often brought out to the terminal block as «TK» or «TOP»). Installation Advice: Ensure the anti-vibration mounts (rubber grommets) on the housing feet are not perished. Hard-mounting this blower to a sheet metal duct will amplify noise significantly. Compatibility: This fan is often controlled by 4-step rotary switches or Siemens Synco controllers using transformer speed regulation. It is a robust solution for Variable Air Volume (VAV) systems where simple voltage steps are used instead of complex VFDs.
| Feature | Specification |
|---|---|
| Max Speed | 2100 RPM |
| Airflow | 1000 – 1400 m³/h |
| Current | 1.3 – 1.5 A |
| Capacitor | 8 µF / 400 VDB |
Pro-Tip
Never operate this fan without the scroll housing. The housing is essential for converting dynamic pressure into static pressure; without it, the fan performs poorly and overheats.
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