AC version: Axial duct fan, AC version. Brief description: Pipe 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 through high-quality materials such as low-noise ball bearings. Fans are maintenance-free. Reversible operation of the fans is possible. Customer-specific special voltages are available as special versions on request and for an additional charge. Installation in any position is possible. Direction of flow: The direction of flow is marked. Standard exhaust air operation, direction of flow sucking via motor. AC motor: Asynchronous motor. Not suitable for conveying air saturated with water vapor. Rated voltage 230 V, 50 Hz. High protection class IP 55. Exception EZR/DZR... D IP 54. Speed controllable. Devices can be continuously controlled with an optional speed controller or they can be switched in stages with an optional 5-stage transformer. Reversible. Reversing operation: The volume flow is reduced by approx. 35% if the direction of flow is abnormal. Capacitor motor with operating capacitor ready for connection in the terminal box. Thermal overload protection as standard. The connections are potential-free on terminals and must be connected to a motor protection switch, e.g. MVE 10 (not suitable for EZR 25/4 D, EZR 30/6 B and EZR 35/6 B) or the control circuit of a contactor. Electrical connection: External terminal box with cable grommets. Safety instructions: The fan may only be put into operation if the impeller is protected against contact in accordance with DIN EN ISO 13857, e.g. with a Maico protective grille SG. Article: EZR 45/4 B, delivery volume: 6670 m3/h, delivery volumeNominal: 4850 m3/h / in opt. efficiency, pressure pfs, nominal: 112 Pa - in opt. efficiency, speed nNominal: 1340 1/min - in opt. Efficiency, speed: 1419 1/min, impeller type: axial, speed controllable: yes, reversibility: yes, voltage type: alternating current, rated voltage: 230 V, mains frequency: 50 Hz, rated power: 445 W / in opt. efficiency, INom: 1.9 A / in opt. efficiency, IMax: 2.2 A, protection class: IP 55, thermal class: B, pole-changing: no, installation position: horizontal / vertical, material: sheet steel, galvanized, color: silver, weight: 14.81 kg, weight with packaging: 16.51 kg, nominal width: 450 mm, width: 510 mm, height: 571 mm, depth:310 mm, width with packaging: 570 mm, height with packaging: 580 mm, depth with packaging: 311 mm, A: 458 mm, B: 310 mm, conveying medium temperature at rated current: 60 °C, conveying medium temperature at IMax: 60 °C, country of origin: Germany, overall efficiency e: 49.7%, measurement category: D, efficiency category: total, efficiency level N: 58.3, VSD required: no, year of manufacture: see type plate, manufacturer name / official registration number / place of establishment of the manufacturer: Maico Elektroapparate-Fabrik GmbH / Register court Freiburg, HRB 601233 / Villingen-Schwenningen, PBEP / conveying volumeBEP / Pfs, BEP: 0.43 kW / 5490 m3/h, nBEP: 1370 1/min, specific ratio: approx. 1, information on dismantling and disposal: see Assembly instructions, Information on installation, operation and maintenance: see assembly instructions, Items used in the efficiency measurement that are not described by the measurement category: -, pf, BEP: 140 Pa, Sound power level LWA5: 85 dB(A), DC motor: false