Three-phase version: Axial tube fan, in three-phase version. Brief description: Tube sleeve made of galvanized sheet steel, with flange on both sides. 8-blade impellers made of glass fiber reinforced polyamide. Flange holes in accordance with DIN EN 12220:1998. DZR 56/6 B and DZR 56/4 B: Flange holes in accordance with DIN EN 12220: 1998. To avoid vibration transmission to the pipe system: Use elastic connecting pieces, feet and vibration dampers. Thermal overload protection as standard. Fans meet the requirements of the European Ecodesign Regulation (EC) No. 327/2011 Directive 2009/125/EC. Vibration-free operation thanks to dynamically balanced impeller and motor (shaft-rotor), in accordance with quality level 6.3, DIN ISO 1940, Part 1. High ventilation-side efficiency, low operating noise. Increased durability thanks to high-quality materials such as low-noise ball bearings. Fans are maintenance-free. Reversible operation of the fans possible. Customer-specific special voltages available as special versions on request and for an additional charge. Installation possible in any position. Direction of conveyance: The direction of conveyance is marked. Standard exhaust air operation, direction of conveyance sucking via motor. Three-phase motor: Asynchronous motor. Not suitable for conveying air saturated with water vapor. Rated voltage 400 V, 50 Hz. High protection class IP 55. Exception EZR/DZR ... D IP 54. Speed controllable. Exception for type DZR 40/2 B. Devices can be switched in stages using an optional 5-stage transformer. Reversible. Reversing operation: The volume flow is reduced by approx. 35% if the direction of flow is abnormal. Thermal overload protection as standard. Exception for type DZR 25/4 D and pole-changing axial tube fans available on request. The connections are potential-free on terminals and must be connected to a motor protection switch, e.g. MV 25, or the control circuit of a contactor. Pole-changing fans: Ensure overload protection with a motor protection switch to be provided by the customer. Electrical connection: External terminal box with cable grommets. Safety instructions: The fan may only be operated if the impeller is protected against contact in accordance with DIN EN ISO 13857, e.g. with Maico protective grille SG. Article: DZR 20/2 B, delivery volume: 1100 m3/h, speed: 2850 1/min, impeller type: axial, speed controllable: yes, reversibility: yes, voltage type: three-phase current, rated voltage: 400 V, mains frequency: 50 Hz, rated power: 75 W, INom: 0.2 A, IMax: 0.25 A, protection class: IP 55, thermal class: B, pole-changing: no, mains cable: 7 / 1.5 mm2, installation position: horizontal / vertical, material: sheet steel, galvanized, color: silver, weight: 5.955 kg, weight with packaging: 6.545 kg, nominal width: 200 mm, width: 254 mm, height: 317 mm, depth: 240 mm, width with packaging: 355 mm, height with packaging: 335 mm, depth with packaging: 265 mm, conveying medium temperature at rated current: -20 °C to 60 °C, conveying medium temperature at IMax: -20 °C to 60 °C, DC motor: false
| Property | Value |
| Diameter of the housing: | 254 mm |
| Air volume without load: | 1100 m³/h |
| Material of the housing: | stainless steel |
| Protection class (IP): | IP55 |
| Connection voltage: | 400 V |
| DC motor: | no |
| Pole-changing: | no |
| Length: | 240 mm |
