Weil McLain 510-312-166 120-24V 40VA DPDT Transformer Less Relay

Description

Weil McLain 510-312-166 120-24V 40VA DPDT Transformer

The Weil McLain 510-312-166 is a dependable step-down control transformer engineered for hydronic heating and boiler control applications. Designed to convert 120V primary power down to a 24V secondary output at 40VA, this transformer delivers the stable low-voltage power required by boiler control circuits and associated accessories. The Double Pole Double Throw (DPDT) switching configuration provides versatile wiring options for a range of control scenarios. Note: This unit is supplied less relay — the relay is not included.

Key Features

• Primary voltage: 120V
• Secondary voltage: 24V
• VA rating: 40VA
• DPDT (Double Pole Double Throw) switching configuration
• Relay not included (Less Relay)
• Genuine Weil McLain OEM replacement part
• Designed for hydronic boiler and heating control systems

Application

This transformer is a direct OEM replacement for compatible Weil McLain boiler systems requiring a 120V-to-24V step-down transformer. It supports the low-voltage control circuits that manage burner sequencing, zone control, and other critical boiler operations. Always verify compatibility with your specific Weil McLain boiler model before installation.

Why Choose Genuine Weil McLain Parts?

Using genuine Weil McLain replacement components ensures proper fit, reliable performance, and helps maintain system warranty compliance. The 510-312-166 is built to the same exacting standards as the original factory-installed part, giving technicians and homeowners confidence in long-term system reliability.