Weil-McLain 381330020 Kit-S Control Module

381-330-020 Weil-McLain Control Module (EVG Series)

The Weil-McLain 381-330-020 Control Module is a factory replacement electronic control component designed for use in Weil-McLain Evergreen (EVG) and related boiler systems. This module provides integrated ignition control, safety monitoring, and system operation logic. Engineered for professional installation, it ensures precise boiler sequencing, diagnostic feedback, and communication with associated system sensors and components to maintain optimal combustion performance and efficiency.

Technical Specifications

• Manufacturer: Weil-McLain
• Model Number: 381-330-020
• Product Type: Boiler Control Module (Electronic Ignition and System Management)
• Application: Weil-McLain Evergreen (EVG) Series Boilers
• Function: Controls ignition, flame sensing, fan modulation, safety lockout, and system diagnostics
• Input Power: 120 VAC, single phase, 60 Hz
• Control Voltage: 24 VAC (low-voltage control circuit)
• Operating Temperature Range: 32°F to 140°F (0°C to 60°C)
• Communication Interface: Integrated digital bus for sensor and system interconnect
• Protection Features: Thermal overload, lockout logic, and error diagnostics
• Mounting Type: Panel-mounted, factory configuration for Evergreen chassis
• Construction: High-durability composite housing with electronic PCB assembly
• Compliance: UL Recognized Component; meets applicable boiler safety and electrical standards
• Replacement Compatibility: Direct replacement for original Weil-McLain EVG control board assembly

Professional Notes

The 381-330-020 Control Module is intended for use by licensed HVAC and boiler technicians during service or replacement of Weil-McLain Evergreen boiler controls. The module manages ignition sequencing, combustion fan speed, flame rectification, and safety interlocks. Replacement requires adherence to manufacturer wiring schematics and safety lockout procedures. System must be fully de-energized before installation, and commissioning should include verification of sensor connections, input voltage, and boiler performance per Weil-McLain service documentation.

Summary

The Weil-McLain 381-330-020 Control Module is a direct replacement control unit for EVG series boilers, providing ignition control, safety monitoring, and operational logic in one integrated assembly. Designed for professional installation, it ensures reliable system control and maintains original manufacturer performance specifications.