Johnson Controls P66BBB-1 Motor Speed Control

The Johnson Controls P66BBB-1 is a robust condenser fan motor speed control designed to maintain stable head pressure by modulating motor speed in response to refrigerant pressure changes. Engineered for single-phase motors, this electronic controller eliminates the cycling issues common in low-ambient conditions, ensuring consistent system performance. This specific model operates within a pressure range of 170 to 230 psi and features a high-pressure cutout for system protection. The unit is housed in a NEMA 3R enclosure, making it suitable for outdoor installations where exposure to rain and ice is a factor. As a direct-acting pressure transducer, it provides precise HVAC fan speed modulation without the need for additional sensors or complex wiring. Contractors rely on the P66 series for its reliability in commercial refrigeration and air conditioning applications where maintaining refrigerant head pressure control is critical for compressor longevity and efficiency.

• Stable Head Pressure: Prevents low-pressure trips and evaporator icing during low-ambient operation.
• NEMA 3R Rating: Rugged weather-resistant housing allows for direct mounting on condensing units.
• Simplified Wiring: Integral pressure transducer reduces installation time and potential leak points.
• Ball Bearing Motor Compatibility: Specifically designed for use with high-efficiency permanently lubricated motors.

What is the default pressure setting for the P66BBB-1?

The controller is factory-calibrated for a range of 170 to 230 psi, making it ideal for standard R-22 and R-407C systems requiring head pressure management.

Can this be used with any motor?

This control is designed for single-phase motors that are rated for speed control. It is recommended for use with ball bearing motors to ensure heat dissipation at lower RPMs.

Where should the pressure connection be made?

The 1/4 inch SAE female flare connector should be attached directly to the high-side liquid line or discharge service valve for accurate sensing.

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.