Weil McLain 510-512-337 Damper Motor

The Weil McLain 510-512-337 Damper Motor is a precision OEM replacement designed for 24V automatic vent damper systems. This motor operator, which is technically identical to the Field Controls GVD-RMA-AL, is essential for maintaining the sequence of operation in high-efficiency atmospheric boilers. It functions by opening the flue damper during a call for heat and sealing it during the off-cycle to eliminate standby heat loss and ensure proper draft termination. For contractors troubleshooting a "no fire" condition, verifying the end-switch continuity within this component is a critical diagnostic step to ensure the safety circuit is completed before ignition.

Engineered for seamless integration, this unit features a Molex connector for plug-and-play installation on existing wiring harnesses. Its robust internal drive train is optimized for the rigorous cycling demands of residential and commercial hydronic applications, providing reliable torque to actuate the damper blade against flue gas soot and debris. The 510-512-337 is the standard boiler vent damper actuator for a wide range of cast iron sections, balancing fuel efficiency with strict safety protocols.

• Voltage: 24 VAC, 60 Hz
• Current Draw: 80mA (operating)
• Connector Type: Multiple-pin Molex
• Cross-Reference: GVD-RMA-AL, Field Controls
• Compatibility: Weil McLain CG, CGa, CGx, EG, EGH, and PFG series boilers

• Direct OEM Alignment: Provides exact fitment for Weil McLain boiler parts, removing the need for field modifications or bracket fabrication.
• Enhanced Fuel Efficiency: Minimizes heat migration up the chimney, maintaining water temperature and reducing burner cycle frequency.
• Safety-First Operation: Integrated end-switch ensures the burner cannot ignite until the damper is in a fully open position.
• Simplified Wiring: The pre-pinned Molex interface secures the connection to the boiler control module without manual wire stripping.

Can the 510-512-337 replace the older 510-512-346 or 347 motors?
No. While they may appear similar, those older models require specific damper and actuator assemblies (such as the 381-800-476 or 477). Always verify the specific MPN on the motor housing before replacement.

Why is my vent damper sticking or humming?
This typically indicates mechanical resistance or "phantom voltage" issues. Ensure there are no carbon deposits or flue obstructions. On systems using Nest thermostats without a C-wire, voltage leakage can cause the damper motor to hum; installing a power connector or isolation relay is recommended.

Safety Notice:
?? California Proposition 65 Warning: This product contains materials known to the State of California to cause cancer and/or reproductive harm.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.