Weil McLain 511-330-090 Control Module

The Weil-McLain 511-330-090 Control Module is a high-performance intermittent pilot ignition control engineered specifically for technical compatibility with Weil-McLain CGi, CGs, and CGt series gas-fired boilers. As a critical component of the combustion system, this UT-1107-1 control module features a factory-calibrated 10-second pre-purge cycle, ensuring the combustion chamber is cleared of residual gases before ignition for enhanced boiler safety and efficiency. This 120V module supports both natural gas and propane gas boiler applications, providing a reliable spark for consistent burner operation across Gold and Series 2 residential systems.

Designed for field durability, the 511-330-090 is polarity-sensitive 120 VAC power ready. It serves as a direct OEM replacement control board, critical for troubleshooting flame rectification issues or ignition failures in hydronic heating systems. By integrating advanced boiler control logic, this module maintains operational integrity and reduces potential system downtime for service contractors and HVAC technicians.

• Optimized Ignition Safeties: Integrated 10-second pre-purge clears the heat exchanger to prevent delayed ignition and maximize burner reliability.
• Broad Model Support: Fully compatible with Weil-McLain CGi Series 2, CGt Series 1 and 2, and CGs gas boilers.
• Dual-Fuel Capability: Engineered for seamless performance in both liquid propane (LP) and natural gas delivery systems.
• OEM Precision: Maintains exact factory specifications for voltage and timing, ensuring seamless HVAC part replacement without field modifications.

• Is this module polarity sensitive? Yes, reversed polarity on the incoming 120 VAC line will cause the status light to flash and prevent the boiler from cycling.
• Does this include the pilot assembly? No, this is the control module only. If you are experiencing ignition issues, technicians often recommend checking the 511-330-080 pilot assembly in conjunction with this control.
• Which boilers does the 511-330-090 replace? It is the correct replacement for 1107-1 United Technologies controls found in CGi, CGs, and CGt residential boiler series.

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.