Johnson Controls P266CHA-100 Control

The Johnson Controls P266CHA-100 is an industrial-grade single phase condenser fan speed control designed to manage head pressure in high-voltage HVACR systems. Operating at 380/460 Vac with a 4-amp output rating, this digital electronic controller replaces the legacy P66 and P215 series. It is specifically engineered for Permanent Split-Capacitor (PSC) motors, utilizing high VAC triacs to regulate supply voltage based on refrigerant pressure. This model includes 3 auxiliary fan control circuits, allowing for the staging of additional fixed-speed fans to maintain stable operation in low-ambient conditions. Its NEMA 3R rainproof enclosure and integral metal heat sink ensure durability in outdoor commercial refrigeration and air conditioning applications. By modulating motor speed rather than cycling fans on and off, the P266CHA-100 reduces condenser pressure variations and extends motor service life through decreased heat and mechanical stress. Using a P266 electronic pressure transducer, it provides precise local or remote sensing for high-efficiency thermal management.

• Optimized Low-Ambient Operation: Maintains consistent head pressure by precisely modulating fan motor speed instead of using inefficient cycling methods.
• Advanced Compatibility: Seamlessly integrates with 380V/460V PSC motors and provides auxiliary staging for up to three additional fans.
• Enhanced Motor Protection: The low-speed capacitor mode increases efficiency and reduces motor temperature during minimum speed operation.
• Rugged Reliability: Features a weather-resistant NEMA 3R enclosure and stainless steel transducers to prevent refrigerant leaks and withstand harsh environments.

Can the P266CHA-100 control multiple motors?
Yes, it can modulate multiple identical motors in parallel, provided the total combined amperage does not exceed the 4-amp limit. Note that amp draw can increase as speed decreases, so verify total load carefully.

Does this unit require a pressure transducer for operation?
Yes, this is a pressure-actuated controller and requires a compatible P266 series transducer (typically 0.5 to 4.5 VDC signal) to sense refrigerant pressure and adjust the triac output.

What are the default start and end settings?
Factory defaults typically set the start voltage at 40% and end voltage at 95% of line voltage, though these parameters are field-adjustable via the internal setup interface to match specific system requirements.

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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.