Warrick 26MB1A0A Control

The Warrick 26MB1A0A is a heavy-duty, solid-state liquid level control designed specifically for boiler low water cutoff protection. Engineered with a 10,000 ohm sensitivity, this direct acting module ensures high-reliability switching in conductive liquid systems, meeting strict CSD1 requirements for industrial boiler safety. This 120Vac unit utilizes an 11-pin octal socket design for seamless plug-in module replacement and field installation, eliminating the need for complex wiring overhauls in existing panels.

For veteran contractors, the 26MB1A0A conductivity relay provides critical operational safety through its manual reset functionality. In the event of a low-water condition, the SPDT relay with powered contacts de-energizes the circuit and locks out until the liquid level is restored and the remote mount normally closed pushbutton is manually depressed. The integrated power outage feature prevents nuisance trips by allowing the control to automatically reset if liquid is present when power returns, while the onboard test feature allows for rapid LWCO circuit verification without the need to physically drain the vessel.

Key Benefits for HVACR Technicians

• Industrial Compliance: Fully meets CSD1 requirements for boiler low water cutoff applications and carries UL 353 limit control recognition.
• Operational Resilience: Features a power outage feature that distinguishes between actual low-water faults and simple power loss to minimize system downtime.
• Simplified Diagnostics: Built-in LED monitoring and a test feature allow for immediate verification of the module's 10A SPDT electrical contacts and probe circuit.
• Flexible Integration: The 11-pin octal socket and screw connector socket design support rapid field swaps and secure terminations in no enclosure open-board configurations.

Common Questions for 26MB1A0A Applications

How do I test the low water cutoff without draining the system?
This module features an integrated test feature. By holding the manual reset button for three seconds, you can simulate a dry-probe condition to trip the LWCO circuit and verify the relay's response without impacting the water level.

What happens if there is a brief power flicker in the building?
The power outage feature is designed to ignore these nuisance events. If water is detected on the probe when power is restored, the control will automatically resume normal operation without requiring a manual reset.

Can I use this for non-boiler liquid level applications?
While optimized for boiler safety, the 10K ohm sensitivity and direct acting mode make it a versatile conductivity relay for point-level monitoring in various industrial tanks and reservoirs.

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.