ensuring the control string remains stable during peak cycling

making it ideal for primary heating element control in multi-stage systems

The internal port is tapped for 1/8" -27 NPT (FPT)

this OEM part is engineered to disrupt the ignition circuit if excessive heat is detected near the burner tray

Always verify your unit

Weil McLain 383-500-628 Transformer ensuring the control string remainsThe Weil McLain 383 500 628 Transformer is a heavy duty, factory specified 120V to 24V step down transformer designed for critical power distribution within high efficiency hydronic systems. This 50VA boiler transformer provides a stable 24VAC secondary output, ensuring consistent low voltage signaling for the Weil McLain Ultra boiler control board and ignition sequences. As a direct replacement for the legacy 511 802 011, it is engineered to handle