ALCO PS3-A1S Pressure Switch - Adjustable Low/High Differential & High Pressure Cut-Out (PCN 0714339)

The ALCO PS3-A1S pressure switch, designated by PCN 0714339, is a critical and highly versatile control component meticulously engineered for comprehensive pressure management in advanced refrigeration, air conditioning, and HVAC systems. This robust switch provides dual-functionality: it features an adjustable pressure differential range of 0.8/1.8 bar (11.8/26 psig) for precise control of cut-in and cut-out points around a specific setpoint, ideally suited for managing parameters like defrost cycles or pump operations. Concurrently, it incorporates formidable high-pressure safety settings with a primary pressure switch (PS) setpoint of 27 bar (390 psig) and a final pressure trip (PT) point of 30 bar (435 psig). This ensures crucial protection against system overpressure, preventing damage to compressors and other sensitive components.

Equipped with a Single Pole Double Throw (SPDT) contact configuration, the PS3-A1S offers flexible and reliable electrical switching. This allows for the accurate activation or deactivation of various system elements, such as compressor motors, condenser fans, or critical alarm systems, when operating pressures deviate from safe parameters. Designed for resilience, it carries robust electrical ratings of 6 FLA, 36 LRA at 230 VAC, and 3A @ 230V AC15, guaranteeing steadfast performance in demanding electrical circuits. Its wide operating temperature range of -40 to 70°C ensures consistent functionality across diverse and challenging environmental conditions. Proudly manufactured in the Czech Republic, the ALCO PS3-A1S adheres to stringent international quality and safety standards (CE and cURus listed). It represents an indispensable asset for optimizing system efficiency, ensuring paramount operational safety, and significantly extending the service life of equipment in a broad spectrum of commercial and industrial applications.

Key Features:

• Part Number (PCN): 0714339
• Model Series: PS3
• Configuration: A1S (Specific internal configuration)
• Type: Adjustable Pressure Switch with Differential and High Pressure Cut-Out
• Adjustable Differential Pressure: 0.8/1.8 bar / 11.8/26 psig
• High Pressure Cut-Out Setpoint (PS): 27 bar / 390 psig (Pre-alarm/Control)
• High Pressure Trip Point (PT): 30 bar / 435 psig (Emergency Shut-down)
• Contact Type: SPDT (Single Pole, Double Throw)
• Electrical Ratings: 6 FLA, 36 LRA, 230 VAC; 3A @ 230V AC15
• Operating Temperature (TS): -40 to 70°C
• Application: Ideal for managing pressure differentials (e.g., oil pressure, defrost control) and providing critical high-pressure safety protection in refrigeration, air conditioning, and heat pump systems.
• Function: Provides precise pressure regulation, comprehensive equipment protection, and reliable system control, enabling both operational control and emergency shutdown.
• Certifications: CE, cURus
• Manufacturing Origin: Made in Czech Republic

Manufacturer Information:

ALCO (An Emerson Brand) ALCO is an internationally recognized and highly respected brand under Emerson's extensive Commercial & Residential Solutions division. It is globally acclaimed for its specialized expertise in the development and manufacture of critical components designed for sophisticated refrigeration, air conditioning, and comprehensive HVAC-R systems. With a venerable heritage that spans many decades, ALCO has cemented its position as a leading innovator and a profoundly trusted supplier. The brand offers an extensive portfolio comprising high-quality flow controls, meticulously engineered mechanical and electronic expansion valves, and a diverse range of essential control components, which include advanced pressure switches and highly precise thermostats. ALCO products are distinguished by their rigorous design for unparalleled precision, unwavering reliability, and optimal energy efficiency. They play a pivotal role in achieving peak system performance and ensuring crucial safety across a broad spectrum of commercial and industrial refrigeration applications, as well as in residential and commercial air conditioning sectors worldwide. ALCO components are fundamental to the effective operation, extended lifespan, and sustainable performance of complex fluid handling systems globally.