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Open-Loop Controls image

Open-Loop Controls

This simple method of control uses a manually operated power controller to apply a fixed voltage to the heating element. Using this system, the operator manually adjusts the controller to change heater temperature. If the airflow is suddenly interrupted, the element could fail. This is a common and inexpensive controller and often used with standard catalog products. 


  • Single Phase Voltage Regulator
  • 0 - 10 Scale Potentiometer
  • Open-loop (manual) Power Controller
  • Input: 120-277 VAC, 50/60Hz, 25A 
  • Output: 17-99% of Input Voltage
  • UL Recognized

F057081 Compatibility

Compatible with: Series I, II, III
Series I F010226
Series I F014372
Series I F014682
Series I F014683
Series II F016501
Series II F016502
Series II F016503
Series II F016504
Series III F017558
​Series III F017575

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