Schematic overview
Heater controller | AC motor 2,5 A
Solution description
5-speed controller for fan heaters with single phase motor. The maximum motor current is 2,5 A. AC fan speed is regulated manually or automatically. When the temperature drops below the set point, the hot water valve is opened via the unregulated output. This unregulated output can control a water valve or an electric heating element. Ambient temperature is measured. The higher the difference between the measured temperature value and the temperature setpoint, the higher AC fan speed. The fan speed is controlled in 5-steps.
Additional specifications and description
Heating for warehouses and production facilities
Industrial fan heaters are a good way to heat large halls such as warehouses or manufacturing plants. Air is drawn in, heated up and blown back into the room. Thanks to the mechanical supply of warm air into the space, it can be heated up more quickly. Higher efficiency is achieved thanks to the mechanical supply of the warm air. The use of industrial fan heaters is particularly recommended in industrial environments or logistics centers. It is the ideal solution for blowing warm air through a space with many obstacles such as machines and warehouse racks.
Fan speed can be set manually or automatically
To avoid overheating, heater and fan are always enabled simultaneously. The included PT500 temperature sensor measures the ambient temperature. The desired temperature can be selected via the rotary button on the front panel or via Modbus RTU communication. When the ambient temperature is lower than the desired temperature, the heating is activated via the unregulated output (ON/OFF). At the same time, the fan is also activated. Fan speed can be controlled automatically (AUTO) or it can be fixed at a constant speed (positions 1 - 2 - 3 - 4 or 5). In position 0, the device is disabled. AC fan speed is regulated by reducing the motor voltage via autotransformer technology. The fan must be voltage controllable. When the ambient temperature is higher than the setpoint temperature, heater and fan are disabled.
Autotransformer technology
Autotransformer technology is used to reduce the motor voltage and the fan speed in 5 steps. This controller is therefore only suitable for voltage controllable motors. If you are not sure whether your motor is voltage controllable, it is best to contact the motor manufacturer. Autotransformer technology is very reliable and robust. It generates a motor voltage with perfect sinusoidal shape. This results in exceptionally quiet motor operation and extended service life. A special impregnated coating reduces the electrical noise from the autotransformers.
Solid enclosure
Make sure that the fan speed controller can cool sufficiently. Preferably install it in a dry, cool place, best not in direct sunlight. The enclosure is designed and manufactured in-house. We use high-quality r-ABS VO (UL94) plastic. This material is flame extinguishing, very tough and offers good protection against impacts. It offers an IP54 protection against ingress dust and water. This fan speed controller can be installed on a wall or panel indoors.
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