Weil-McLain 511842370 Transformer, CGa Series, CGi, Series, CGs Series, CGt Series 1, Series 2, Gv90+ Series 1, Gv90+ Series 2

Weil-McLain Step Down Transformer – 120V to 24V Power Supply for Boiler Applications

The Weil-McLain Step Down Transformer is designed to provide stable low-voltage power for gas boiler control systems. Converting a 120V primary supply to a 24V secondary output, this transformer delivers the reliability required for ignition circuits, zone controls, and other safety-critical components in hydronic heating systems.

Rated at 40 VA, this unit is built to support the electrical demands of modern heating equipment. Its compact construction and proven design make it a dependable choice for service replacements and new boiler installations alike.

Key Advantages

• Primary Input: 120V AC standard line voltage.
• Secondary Output: 24V AC for low-voltage control circuits.
• Power Rating: 40 VA capacity suitable for multiple control applications.
• Durable Build: Engineered to handle continuous load in demanding boiler environments.
• Compact Profile: Space-efficient design simplifies installation in control panels or tight service compartments.

Technical Specifications

• Model: Weil-McLain Step Down Transformer
• Input Voltage: 120V AC
• Output Voltage: 24V AC
• VA Rating: 40 VA
• Application: Boiler control circuits, thermostats, ignition modules
• Mounting: Standard field-installable design

Installation Considerations

This transformer is designed for straightforward field wiring but should be installed by a licensed electrician or HVAC professional. Proper termination and grounding are critical to ensure compliance with local electrical codes and to protect control equipment. Connections should always be made with approved fittings, and output circuits should be fused or breaker-protected as required.

Professional Use

For Contractors: The transformer provides consistent performance for boiler service work and new installations. Its durable windings and dependable rating reduce call-backs and provide confidence in long-term system reliability.

For Service Technicians: Ideal for troubleshooting and replacements in the field. With a standard 120V to 24V configuration, it integrates seamlessly with most common hydronic boiler control systems.

Summary

The Weil-McLain Step Down Transformer is a practical solution for maintaining safe and efficient low-voltage operation in boiler systems. With a 120V primary, 24V secondary, and 40 VA capacity, it delivers the power and dependability required for professional-grade heating installations.