The Johnson Controls P66BAB-5 is a professional-grade electronic fan speed control designed for maintaining stable head pressure in air-cooled condensers during low-ambient conditions. Built with a dual input sensor model, this controller modulates the fan motor speed based on direct refrigerant pressure, specifically optimized for an operating pressure range of 190-250 psig. This unit features a 60-inch capillary with a 1/4 inch SAE brass flare nut, allowing for versatile mounting and reliable pressure sensing on the high side of the system. The start voltage is factory-calibrated at 40% of the supply voltage, ensuring the fan motor overcomes static friction immediately upon startup to prevent stalling or overheating. This HVAC pressure transducer control is engineered for 208/240V single-phase motors, providing precise modulation that extends the life of the compressor by preventing excessive cycling in cold weather environments. Key Benefits for Technicians: Precise Head Pressure Control: Maintains consistent condenser fan speed to stabilize system pressures during fluctuating ambient temperatures. Dual Sensor Input: Enhances reliability in multi-circuit systems or complex HVACR refrigeration setups. Field-Proven Durability: NEMA 1 enclosure protects internal components for long-term service in mechanical rooms and protected outdoor housings. Reduced Maintenance: Minimizes mechanical wear on the fan motor and contactors compared to traditional on/off pressure switches. Simplified Installation: The 5-foot capillary provides ample reach for high-side access ports without needing additional extensions. Common Questions: What is the start voltage setting on the P66BAB-5? The unit is configured with a start voltage of 40% of the supply voltage, ensuring the motor starts at a speed high enough to initiate airflow immediately. Which refrigerants are compatible with the 190-250 psig range? This specific P66 Series control range is typically utilized for R-134a systems or other medium-pressure refrigerants requiring a 190 to 250 psig setpoint for stable operation. Can this control be used with any fan motor? No, the Johnson Controls P66 requires a motor designed for speed modulation (Permanent Split Capacitor - PSC) that is approved by the manufacturer for use with solid-state controllers. This item is not eligible for free shipping. 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.
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