Operating conditions

Operation only permitted, if following conditions are met:

• Permanently installed electrical installation.
• Connection cable permitted for explosion risk areas and load.
• Mains disconnect device with a contact opening of at least 3 mm per pole.
• Permitted voltage and frequency rating plate.
• Explosion protection terminal box according to standard EN 60079-1 (Ex “d”) must be used.
• Cable screw connections according to standard EN 60079-1 (Ex “d”) must be used.
• Protective-conductor terminal, at mains end in terminal box. There is a terminal on the outside of the unit for earthing a duct system.
• Operating in intended air power range.
• Permitted operating point. The current and power stated on the rating plate are measured with free-suction and free blow-out. They may be higher or lower depending on the operating point.

A PTC thermistor triggering system is essential for thermal fusing.