Weil McLain 570-350-370 Delay Timer

The Weil McLain 570-350-370 Delay Timer is a critical OEM component designed for precise sequencing in hydronic heating systems, specifically engineered for LGB boiler models. Operating on a 24V control circuit, this timer provides a fixed 6-minute delay to prevent rapid short-cycling, protecting the burner and ignition components from premature fatigue. In the field, managing post-purge cycles or staged firing sequences is vital for maintaining high system efficiency and reducing mechanical stress. This genuine Weil McLain replacement part ensures full compatibility with existing factory wiring harnesses, maintaining the integrity of the boiler's safety string. For technicians troubleshooting intermittent lockout issues or sequencing failures, verifying the timing interval of the 570-350-370 timer is a standard diagnostic step. Utilizing this HVAC delay relay ensures that your equipment operates within the manufacturer's specified parameters for safe and reliable heat transfer.

• Short-Cycle Protection: The 6-minute delay protects expensive burner components by preventing frequent on/off cycling.
• OEM Compatibility: Specifically designed for Weil McLain LGB boilers, ensuring a direct fit without technical modifications.
• System Reliability: Corrects sequencing issues within the 24V control circuit to ensure stable operation.
• Durable Construction: Built to withstand the high-temperature environments found in commercial and residential boiler rooms.

Which boiler models use this timer?

This part is primarily utilized in Weil McLain LGB series boilers. Always cross-reference your specific wiring diagram to confirm part number 570-350-370.

Can I use a 3-minute timer instead of this 6-minute version?

It is not recommended. The 6-minute delay is calibrated to the specific thermal characteristics of the heat exchanger to ensure proper purging and cooling.

What are the symptoms of a failing delay timer?

Common signs include the burner failing to fire despite a call for heat, or the system bypassing the necessary delay period and short-cycling during light loads.

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.