Product overview:
Condenser fan speed regulation helps maintain proper refrigerant head pressure during low outdoor temperature conditions. The Hoffman Controls 814-10EH Head Pressure Control 10A/24V 120-480V is an OEM electronic controller that adjusts condenser fan motor speed according to liquid-line temperature. It uses microprocessor-based control and an integrated 24 VAC power source to regulate condenser airflow. Its adjustable settings support head pressure management in designated air conditioning and refrigeration systems.
Condenser Fan Speed Regulation:
The controller monitors liquid-line temperature through an external sensor and adjusts condenser fan motor speed as operating conditions change. By reducing or increasing airflow across the condenser, it helps maintain the required condensing temperature during low ambient conditions. The control can also cycle the fan off after minimum airflow is achieved.
Electronic Control:
The electronic controller uses temperature sensor input to determine the required fan speed. Its dual-sensor capability supports monitoring of one or two independent refrigerant circuits sharing condenser fan motors. Adjustable range and minimum-speed settings help tailor operation to the refrigeration system and fan motor characteristics.
Replacement guidelines:
Replace the Hoffman Controls 814-10EH controller when condenser fan speed fails to adjust according to liquid-line temperature or the control no longer maintains proper head pressure. Inspect the temperature sensors, electrical connections, motor wiring, and power supply before replacement. Verify the voltage rating, motor type, current capacity, and sensor arrangement to ensure the replacement matches the existing installation.
Common Failure Symptoms:
- Condenser fan runs continuously at full speed.
- Fan speed fails to adjust during low ambient conditions.
- Condensing pressure becomes unstable.
- Condenser fan stops responding to temperature changes.
- Refrigeration operation becomes inconsistent.
Equipment compatibility:
The Hoffman Controls 814-10EH is an OEM replacement option for designated single-phase condenser fan applications using permanent split capacitor or shaded-pole motors. It supports open-frame, drip-proof motor configurations and can regulate one or two independent refrigerant circuits sharing the same fan motor arrangement. Verify the motor type, electrical supply, current rating, sensor configuration, and wiring requirements before replacement.
Technical Specifications:
Brand: Hoffman Controls
Part Number: 814-10EH
Product Type: Electronic Head Pressure Control
Control Type: Microprocessor-Based
Voltage Range: 115/208–230/460 VAC
Control Voltage: 24 VAC
Current Rating: 10 A
Frequency: 50/60 Hz
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