Hoffman Controls 816-10DH Control

The Hoffman Controls 816-10DH is a high-performance head pressure control designed for air-cooled condensers, ensuring optimal operation in low-ambient conditions. Engineered for versatility, this pressure-actuated controller supports a wide voltage range of 120-600V AC and manages loads up to 10A. By modulating condenser fan motor speed based on liquid line pressure, it prevents low suction pressure and evaporator icing during cold weather startups and operation. The dual-range functionality provides precise setpoint adjustments, essential for maintaining stable head pressure in commercial refrigeration and HVAC systems. Professionals value the 816-10DH for its rugged build quality and ability to stabilize expansion valve performance across varying ambient temperatures. This 24V control circuit module integrates seamlessly into existing high-voltage motor circuits, making it a standard replacement for standard modulating fan speed controllers in demanding mechanical environments.

• Universal Voltage Compatibility: Operates across 120V, 208V, 240V, 480V, and 600V systems without external transformers.
• Precise Pressure Sensing: Utilizes direct refrigerant pressure feedback to provide immediate fan speed response.
• System Stability: Maintains consistent liquid line pressure to ensure reliable compressor oil return and cooling capacity.
• Simplified Wiring: Designed for straightforward integration into HVAC control cabinets with standard mounting patterns.

Common Technical Questions

What is the maximum amperage rating for the 816-10DH?
The unit is rated for a maximum full load amperage of 10A, suitable for most single-phase condenser fan motors.

Can this controller be used on multi-circuit condensers?
Yes, it can be applied to individual fan motors on multi-circuit systems to maintain independent head pressure control per circuit.

Does this control require a separate power supply for the sense circuit?
The control circuit operates on 24V AC, while the motor power side handles the high-voltage load, requiring both inputs for proper operation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.