Protective grille on the suction side, yellow chromated, contact protection in accordance with DIN EN ISO 13857. 8-blade impellers made of glass fiber reinforced polyamide. Dynamically balanced in 2 levels, in accordance with quality level 6.3, DIN ISO 1940, Part 1. Installation in any position possible. Direction of flow: The following illustration shows the direction of flow: Direction of flow A: Suction via the motor, standard. Direction of flow B: Blowing via the motor, on request. Direction of rotation, reversing operation: The volume flow is reduced by approx. 35% in abnormal direction of flow. Motor: Asynchronous motor. Speed controllable. Exception: Type EZQ 45/6 B, EZS 45/6 B, DZQ 40/2 B and DZS 40/2 B. Reversible. Exception: Fans with shaded pole motor (...-E). Not suitable for conveying air saturated with water vapor. Three-phase motor: DZQ and DZS series. Rated voltage 400 V, 50 Hz. Protection class IP 55. Exception DZQ/DZS... D IP 54. Thermal overload protection as standard. Exception: Available on request for DZQ/DZS 25/4 D and pole-changing axial wall fans. 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 on site. Pole-changing motors with speed ratios 8/4 or 4/2 are connected using the Dahlander principle. Electrical connection: On terminal block in the end cover of the motor. Safety instructions: The fan may only be put into operation if the impeller is protected against contact in accordance with DIN EN ISO 13857. Article: DZS 40/42 B, design: steel wall ring, delivery volume: 3270 m3/h / 6700 m3/h, delivery volumeNominal: 3270 m3/h / 6700 m3/h / in opt. efficiency, pressure pfs, nominal: 95 Pa - 350 Pa - in opt. efficiency, speed nNominal: 1480 1/min - 2920 1/min - in opt. Efficiency, speed: 1518 rpm / 2944 rpm, impeller type: axial, speed controllable: yes, reversibility: yes, voltage type: three-phase current, rated voltage: 400 V, mains frequency: 50 Hz, rated power: 245 W / 1585 W / in opt. Efficiency, INom: 0.75 A / 2.6 A / in opt. Efficiency, IMax: 4.3 A, Protection class: IP 55, Thermal class: F, Pole-changing: yes, Number of poles at high speed: 2, Number of poles at low speed: 4, Mains cable: 5 / 1.5 mm2, Installation location: wall / ceiling, Installation type: surface-mounted, Installation position: horizontal / vertical, Material: Sheet steel, galvanized, Weight: 22.25 kg, Nominal width: 400 mm, Width: 580 mm, Height: 580 mm, Depth: 345 mm, Conveyor temperature at nominal current: 60 °C, Conveyor temperature at IMax: -20 °C to 60 °C, Overall efficiency e: 41.1%, Measurement category: A, Efficiency category: static, Efficiency grade N: 46.2, VSD required: no, 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 / Discharge volumeBEP / Pfs, BEP: 1.585 kW / 6700 m3/h / 350 Pa, nBEP: 2920 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: -, Sound power levelLWA7: 78 dB(A) / 94 dB(A), Cover flap: without