Weil McLain 383-500-021 Time Delay Kit

The Weil McLain 383-500-021 Time Delay Kit is a critical field-service solution designed to optimize the ignition and cycling sequences of Ultra Gas Boilers. As an essential boiler replacement part, this kit addresses common issues where immediate firing or rapid cycling accelerates component wear. By integrating a 3-minute time delay relay, the system ensures that internal processes stabilize and residual heat is managed before the next call for heat is initiated, preventing short cycling and improving overall fuel efficiency.

Built for professional-grade reliability, the Weil McLain 383-500-021 is a comprehensive assembly that includes the electrical box, precise timing relays, and detailed wiring instructions for seamless integration into existing control circuits. This HVAC timing control kit is engineered specifically for Weil McLain hydronic systems, ensuring full compatibility with the manufacturer’s high-efficiency condensing units. Installing this genuine OEM time delay relay helps maintain the operational integrity of the burner and gas valve assembly by providing the necessary latency for safe, sequenced operations in both residential and light commercial applications.

• Reduces Short Cycling: Implements a hard 3-minute delay to prevent frequent, inefficient burner starts.
• Comprehensive Components: Includes the relay box and all necessary internal components for a complete field upgrade.
• Technical Integration: Specifically designed to interface with Ultra gas-fired boilers and their associated control logic.
• Reliability: Heavy-duty construction ensures stable timing under the high-temperature conditions of a boiler cabinet.

• Will this kit work with any Weil McLain boiler? This specific kit is designed for the Ultra Gas Boiler series; always verify your model number against the manufacturer’s service manual for exact compatibility.
• Does this include the external wiring? The kit provides the electrical enclosure and internal relays; external field wiring must be supplied by the technician per the included diagrams.
• Why is a 3-minute delay necessary? It allows for post-purge or system stabilization, ensuring the heat exchanger is ready for the next cycle, which preserves the life of the igniter and gas valve.

This item is not eligible for free shipping.

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.