
Optimizing your hydronic heating system requires precise command over ignition and monitoring sequences, which is precisely what the Weil-McLain 381-330-029 control module facilitates. Designed specifically for ECO series units, this board acts as the central intelligence for your heating infrastructure, ensuring that safety protocols and heat output remain within calibrated parameters.
The module functions by processing sensory input from your boiler to regulate burner modulation and circulation logic. By maintaining exact internal communication between sensors and the gas valve, the 381-330-029 prevents short-cycling and contributes to the overall thermal efficiency of the appliance, protecting the internal components from excessive strain during high-demand periods.
Key System Performance Baselines:
- Enhanced Efficiency: Engineered to minimize fuel consumption through precise burner modulation control.
- Seamless Integration: Directly compatible with existing ECO series electronic architecture for a plug-and-play installation.
- Rugged Reliability: Constructed to withstand the temperature fluctuations common in demanding residential hydronic environments.
⚠️ Application Profile: This module is exclusively engineered for use with Weil-McLain ECO series boilers, specifically the ECO-70, ECO-110, and ECO-155 models, and functions as a direct replacement for part 383-800-00.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | 381-330-029 |
| Compatible Boiler Models | ECO-70, ECO-110, ECO-155 |
| Replaces Part Number | 383-800-00 |
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
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- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
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👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.