Brief description: Housing, base plate, inlet nozzle and rain protection hood made of galvanized sheet steel. Galvanized protective grille on the outlet side, contact protection in accordance with DIN EN ISO 13857. Stable transport eyes enable transport by crane. 8-blade impeller made of glass fiber reinforced polyamide. 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 are available as special versions on request and for an additional charge. Can be switched to ventilation or exhaust with a separate switch (except EZD ... E). Direction of flow: The direction of flow is marked. Standard exhaust air operation, direction of flow blowing over the motor. Three-phase motor: Asynchronous motor. Rated voltage 400 V, 50 Hz. Protection class DZD ... D IP 54. Protection class DZD ... B and ... E IP 55. Speed controllable. 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 DZD 25/4 D (motor protection switch is provided on site). The connections are potential-free on terminals and must be connected to a full motor protection switch e.g. MV 25 or the control circuit of a contactor. Electrical connection: Connection cable, approx. 1.7 m long. 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. Correct permanent installation with a horizontal mounting position, permanently laid electrical supply line and correct air routing via a shaft or pipe is mandatory. Article: DZD 25/2 B, delivery volume: 1840 m3/h, delivery volumeNominal: 1100 m3/h / in opt. efficiency, pressure pfs, nominal: 125 Pa - in opt. efficiency, speed nNominal: 2830 1/min - in opt. efficiency, speed: 2844 1/min, impeller type: axial, speed controllable: yes, reversible: yes, voltage type: three-phase current, rated voltage: 400 V, mains frequency: 50 Hz, rated power: 170 W / in opt. Efficiency, INom: 0.35 A / im opt. Efficiency, IMax: 0.4 A, Protection class: IP 55, Thermal class: B, Mains cable: 7 / 1.5 mm2, Installation location: roof, Installation position: vertical, Material: Sheet steel, galvanized, Color: silver, Weight: 14.19 kg, Weight with packaging: 16.65 kg, Nominal width: 250 mm, Width: 570 mm, Height: 570 mm, Depth: 325 mm, Width with packaging: 615 mm, Height with packaging: 615 mm, Depth with packaging: 370 mm,Conveyor temperature at rated current: -20 °C to 60 °C, Conveyor temperature at IMax: -20 °C to 60 °C, Overall efficiency e: 29.2%, Measurement category: C, Efficiency category: static, Efficiency level N: 40.2, Year of manufacture: see type plate, Manufacturer name / Official registration number / Manufacturer's place of business: Maico Elektroapparate-Fabrik GmbH / Register court Freiburg, HRB 601233 / Villingen-Schwenningen, PBEP / Conveyor volumeBEP / Pfs, BEP: 0.179 kW / 1540 m3/h / 122 Pa, nBEP: 2853 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: Determination of energy efficiency without protective grille and roof hood. Sound power levelLWA7: 91 dB(A)