Emerson Alco 097993 Control

The Emerson Alco 097993 Control (Model FSX-42S) is a high-performance electric fan speed control designed to optimize head pressure in air-cooled condensers. Engineered for 230Vac systems, this pressure-actuated controller modulates fan speed between 190-360 PSI, maintaining stable refrigeration cycles even as ambient temperatures fluctuate. Built with a 1/4" flare connection (7/16"-20 UNF), the unit mounts directly to the system, facilitating a streamlined retrofit for contractors. The FSX-42S utilizes phase-cutting (TRIAC) technology to manage permanent split capacitor (PSC) and shaded pole motors up to 4 Amps. By regulating motor RPM, it prevents liquid floodback, stabilizes expansion valve operation, and reduces fan noise during low-load conditions. The compact design features state-of-the-art electronics and a turnable connector adjustable in 90-degree steps for tight mechanical spaces. This condenser fan speed control is a critical component for ensuring year-round system reliability in commercial HVACR applications.

Key Benefits:

• System Stability: Maintains consistent head pressure to ensure the expansion valve receives a solid column of liquid for optimal mass flow.
• Motor Compatibility: Specifically designed for variable voltage speed control on PSC and shaded pole fan motors.
• Field Adjustability: Features an adjustable pressure range from 190 to 360 PSI with a pre-set factory calibration of 235 PSI.
• Durable Construction: Integrated protection circuit guards against voltage spikes and current peaks, ensuring long-term performance in demanding environments.
• Noise Reduction: Automatically scales back fan speed during cooler ambient periods, significantly lowering decibel levels.

Common Questions:

• What motor types are compatible with the FSX-42S? It is intended for use with single-phase motors approved for phase-cut speed control, such as PSC and shaded pole designs. Do not use with two-speed motors.
• Can multiple controls be used in parallel? Yes, the Emerson 097993 can be utilized in parallel configurations for multi-circuit condensers.
• How do I adjust the pressure setpoint? The unit includes a setting screw where clockwise turns increase the pressure setting and counterclockwise turns decrease it.

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.