Johnson Controls P266ABA-1K Control

The Johnson Controls P266ABA-1K is a comprehensive single phase condenser fan speed control kit designed to maintain optimal head pressure in air conditioning and refrigeration systems. Engineered for durability, this electronic fan speed controller utilizes a P266 pressure transducer (0-508 psi) and high-VAC triacs to modulate motor speed based on real-time refrigerant pressure. Operating at 208/240 VAC with a maximum output of 8 amperes, it provides precise control for variable speed motors and supports up to three auxiliary fan circuits. For technicians managing low-ambient cooling applications, the P266ABA-1K ensures consistent system performance by preventing evaporator freeze-ups and compressor short-cycling. The inclusion of a 6.6-foot cable allows for flexible transducer mounting, making it an essential solution for head pressure control in demanding commercial environments. This HVAC pressure transducer kit is built to handle high-demand cycles without compromising the efficiency of the condenser fan motor.

Key Benefits for Technicians

• Precise Motor Modulation: Delivers smooth variable speed fan control to stabilize head pressure during fluctuating ambient temperatures.
• Multi-Fan Capability: Equipped with three high VAC triacs and auxiliary circuits to manage complex multi-fan condenser configurations.
• NEMA 3R Rated Enclosure: Designed for reliability in outdoor installations, protecting internal components from environmental exposure.
• Simplified Installation: The kit includes a pre-calibrated 508 psi pressure transducer and a generous 6.6-foot communication cable for rapid field deployment.
• Voltage Versatility: Optimized for 208/240V HVAC systems, ensuring compatibility with standard commercial power supplies.

Common Questions

How does the P266ABA-1K handle low-ambient conditions?
It monitors discharge pressure via the P266 transducer and reduces fan speed or cycles auxiliary fans to maintain head pressure above the minimum threshold, ensuring proper expansion valve operation.

Can I use this controller with any single-phase motor?
It is designed for use with permanent split capacitor (PSC) motors that are thermally protected and approved for speed control by the manufacturer.

What happens if the pressure transducer fails?
The controller features integrated safety logic; however, always verify field wiring and transducer orientation to prevent electrical interference or mechanical stress on the sensing element.

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.