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this input board is designed as the primary service part for legacy Barber Colman systems requiring the 021-0474 or KEL021-0247 specifications
Automatic reset facilitates hands-off operation following temporary water level fluctuations
ensuring a secure and straightforward electrical connection for field technicians
Key Benefits Engineered for Compatibility: Drop-in replacement designed specifically for Reznor heating systems to eliminate field-modifications and ensure a perfect fit
High Flow Capacity: Supports appliances up to 230
Schneider Electric (Barber Colman) 2390-501 Gradual Switch 30067439-890 this input board is designedThe Schneider Electric 2390 501 Gradual Switch is a precision engineered pneumatic manual positioner designed for proportional control in commercial HVACR systems. Utilizing a reliable manual dial, this device allows technicians to modulate output pressure from 0 to 20 psig, providing direct control over pneumatic actuators, dampers, and valves. Built for durability and accuracy, the 2390 501 operates with a 20 psig main air pressure and delivers an 8