Emerson Alco 099009 Pressure Control

The Emerson Alco 099009 (Model PS2-Y7K) is a heavy-duty dual pressure control designed for precise cycling and high-pressure protection in commercial refrigeration and HVAC systems. This PS2 Series dual control features a low-pressure side ranging from 9"Hg to 102 psig with an adjustable 15 to 73 psig differential, paired with a high-pressure side rated for 87 to 464 psig. Engineered for versatility, the low side operates on an auto reset mechanism, while the high side utilizes a convertible reset (manual or auto) configuration to meet specific safety protocols. As a direct 097943 replacement, it maintains system integrity via high-rated SPDT contacts and a 1-meter (3 ft.) capillary tube with a 1/4" flare nut. The 099009 ensures reliable compressor protection and head pressure control in demanding environments, offering technicians a robust solution for multi-refrigerant applications requiring accurate pressure switch calibration and durable vibration-resistant bellows.

Key Benefits for Contractors

• System Versatility: Direct replacement for the legacy 097943 model, ensuring seamless retrofitting in existing racks and condensing units.
• Advanced Reset Logic: Features a convertible high-pressure reset, allowing technicians to toggle between manual lockout for safety or automatic cycling.
• Robust Construction: Equipped with high-performance SPDT micro-switches to prevent contact bounce and ensure long-term electrical reliability.
• Precision Calibration: Wide setpoint ranges allow for fine-tuning low-pressure cut-out and high-pressure limit parameters across various refrigerants.
• Simplified Installation: The integrated 3-foot capillary tube and 1/4" flare nut reduce the need for additional fittings during field replacement.

Common Questions

Is the Emerson 099009 compatible with high-pressure refrigerants?
Yes, the PS2-Y7K is designed to handle high-side pressures up to 464 psig, making it suitable for R-404A, R-134a, and R-507 systems.

How do I change the high-side reset from manual to automatic?
The convertible reset feature is internal to the housing; removing the cover allows the technician to adjust the reset plate to either lock out or automatically reset upon pressure drop.

Can this dual control replace a single-function pressure switch?
While it can monitor both high and low sides, it is specifically intended for applications requiring simultaneous dual pressure monitoring to protect the compressor from both loss of charge and overpressure.

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.