Warrick 26B1D1B Series 26 LWCO

The Warrick 26B1D1B is a heavy-duty Series 26 low water cut-off (LWCO) designed for reliable liquid level control in commercial and industrial boiler applications. Engineered with a 120 VAC supply voltage and a SPDT N.O. configuration, this induction-type controller utilizes the conductivity of the fluid to complete a circuit, ensuring precise monitoring and protection against low water conditions. The 26B1D1B model features an internal manual reset and a dedicated test button, essential for meeting stringent safety codes and simplifying field diagnostics during routine maintenance. With a sensitivity of 10K ohms, it provides stable performance in various water qualities without the risk of electrolysis or fouling common in lesser mechanical float switches.

Key Technical Benefits

• Solid-State Reliability: Eliminates moving parts within the vessel, reducing mechanical failure points common in traditional float-style LWCO systems.
• Manual Reset Capability: Ensures the system remains locked out after a low-water event until a technician can verify boiler safety.
• Field-Proven Durability: The NEMA 1 enclosure and rugged internal transformer are built for high-ambient mechanical rooms.
• Direct Compatibility: Designed for seamless integration with existing Warrick electrode probes and sensor fittings.

Common Technical Questions

What is the maximum temperature rating for the 26B1D1B controller?
The internal electronics are rated for operation up to 150°F, though the specific temperature limits of the system are often defined by the probes and pressure vessels used in the installation.

Can this unit be used for high-level alarm as well?
While the Series 26 is optimized for low water cut-off and boiler feedwater control, its SPDT contacts allow for versatile wiring, though manual reset logic is specifically intended for safety shutdown applications.

How is the sensitivity calibrated for different water conditions?
The 26B1D1B features a fixed 10,000 ohm sensitivity, which is the industry standard for most potable water and boiler condensate applications, providing a balance between responsiveness and false-trip prevention.

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.