Warrick 26NMC1B0 Control

The Warrick 26NMC1B0 Control is a precision-engineered low water cutoff plug-in module designed for reliable liquid level monitoring in hydronic and steam boiler applications. Operating on a 120Vac supply voltage, this direct acting liquid level control features a 26,000 ohm sensitivity, making it ideal for systems requiring high-resistance sensing. The unit utilizes an 11-pin DIN mount style, facilitating quick installation or replacement within existing control panels. Its SPDT relay output (1 Normally Open/1 Normally Closed) provides versatile switching capabilities for burner circuits or alarm indicators. Built for industrial durability, the Warrick 26 Series architecture ensures stable performance without the need for periodic recalibration. This specific model, the Warrick 26NMC1B0, is supplied as an open-board module with a screw connector socket, ensuring a secure mechanical connection for field wiring. Technicians frequently specify this conductance-actuated control for its proven track record in preventing dry-fire conditions in commercial boilers.

• Field-Serviceable Design: The 11-pin plug-in module allows for rapid diagnostics and replacement without disturbing field wiring.
• Direct Acting Reliability: Configured for low water cutoff protection, ensuring the relay de-energizes upon sensing a low-level condition.
• Universal DIN Compatibility: Fits standard DIN rail configurations, simplifying integration into multi-component HVACR control cabinets.
• High Sensitivity Logic: The 26k ohm sensitivity threshold is optimized for standard water quality, reducing nuisance tripping.

What is the primary function of the SPDT relay in this module?
The SPDT (Single Pole Double Throw) relay allows the Warrick 26NMC1B0 to simultaneously break the burner circuit and engage an external alarm or status light when a low-water state is detected.

How does direct acting operation differ in this control?
In direct acting mode, the load relay is energized when the liquid level is in contact with the probe. When the level drops below the probe, the relay de-energizes, providing a fail-safe low water cutoff.

Is an enclosure included with the 26NMC1B0?
No, this specific model is a no enclosure plug-in module designed for mounting inside a protected NEMA-rated electrical panel using the provided screw connector socket.

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.