Additional specifications and description
How does it work?
The fan speed can be set manually via the rotary switch. The relay output is designed to control an external gas supply valve. The gas supply will be enabled only when the exhaust fan is active. If no air flow is detected within 60 seconds, the gas supply valve will be closed. An optional pressure relay must be connected to the input FL.
Via an external switch - connected to the input NC - a remote start-stop command can be generated. If no external switch is available, the fan can be started via the built-in rotary switch. In that case, both NC terminals should be bridged.
The extra, unregulated output (230 VAC) is active when the motor is enabled. It can be used to control an external run-indicator, lights, etc.
E.g. the kitchen hood lights can be activated simultaneously with the fan.
Thermal motor protection
This fan speed controller can monitor thermal motor contacts (TK or thermal contacts measure temperature in the motor windings). In case of motor overheating, the TK monitoring function will disable the motor to prevent motor damage. If the motor is not equipped with TK contacts, both TK terminals of the controller must be bridged to simulate normal motor temperature.
Auto reset after power failure
In case of a power failure, this controller will automatically reset itself. When the power is restored, the motor will restart automatically.
The enclosure is made of high-quality steel. The enclosure can be surface mounted and offers an IP54 protection against ingress of dirt, dust and moisture.