Warrick DFL1A0K0404 Control

For technicians overseeing steam or hydronic systems, the Warrick DFL1A0K0404 is a professional-grade, solid-state dual function level control designed for high-stakes liquid management. Operating on a 120V AC supply, this open-circuit board unit manages two independent level functions: single-level monitoring (often for high-level alarms) and differential-level control for pump automation. With its 10K Ohm inverse operation sensitivity, it is specifically fine-tuned for conductivity-based sensing in boilers, foodservice equipment, and chemical delivery systems. This model includes a vital manual reset for low-water cutoff (LWCO) scenarios and a power outage feature that prevents nuisance trips by automatically re-energizing once line power is stable. The hardware and dirty electrode detection technology ensure the SPDT dry contacts (rated at 10A resistive) trigger reliably even in harsh process conditions. Field-installable with 1/16-inch panel standoffs and spade terminals, this UL 353 and UL 508 compliant controller integrates seamlessly into existing industrial control panels where precision and uptime are non-negotiable.

• Dual-Function Versatility: Consolidates independent single-level and differential level management into one compact open-board footprint.
• Enhanced System Safety: Includes a manual reset function for critical low-water conditions, ensuring equipment does not dry-fire.
• High Resistive Rating: Features 10 Amp resistive contact ratings at 120/240 VAC, capable of direct pilot duty or relaying to larger contactors.
• Inverse Acting Logic: Designed for "pump up" or "fill" operations where the relay remains closed until the high-level probe is satisfied.
• Industrial Durability: Solid-state conductivity-based sensing eliminates moving parts, reducing mechanical failure in turbulent liquid environments.

Common Questions

How do I wire the DFL1A0K0404 for pump-up operation?
Because this is an inverse operation (10K Ohm) model, the normally open contacts will close when the liquid level is below the low-level probe. Use terminals H and L for differential control and ensure the ground (G) connection is solid to the vessel or common probe.

Will this control board detect scale buildup on probes?
Yes, the integrated dirty electrode detection is designed to sense increased resistance caused by fouling. If the sensitivity exceeds the 10K Ohm threshold due to buildup, it prevents improper relay cycling and signals that maintenance is required.

Can I use this as a direct replacement for a Series 26 module?
While the Series 26 is focused purely on low-water cutoff, the DFL Series provides dual-function capabilities. Verify your standoff locations and spade terminal layout, as the DFL Series often requires a specific 1/16-inch panel standoff mounting style for its open-board configuration.

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.