Field Controls 46487601 Vent Damper

The Field Controls GVD-12PL (46487601) is a critical efficiency component for modern and legacy gas-fired heating systems. This 12-inch 24Vac gas vent damper is engineered to serve as the direct replacement for Q35RQ-1, offering a seamless swap-out for technicians maintaining boilers and modular heating units. Constructed from high-grade stainless steel for superior corrosion resistance, the GVD-12PL operates with both intermittent ignition and standing pilot 24V gas systems. This device functions by sealing the vent during the off-cycle, preventing conditioned air and residual appliance heat from escaping up the chimney, which significantly corrects efficiency loss and drafting issues. Note that this specific part number is the vent damper without harness; for new installations or damaged wiring, a separate universal wiring kit is required.

Performance is managed via a motorized assembly that powers the damper open in approximately 15 seconds upon a call for heat and powers it closed after the thermostat is satisfied. The 46487601 features a manual hold open switch to facilitate troubleshooting during service calls. Safety is prioritized through dual safety switches that act as a hard interlock: the burner will physically not fire until the damper has reached a fully open 90-degree position. This ensures no flue gas spillage or carbon monoxide hazards occur due to a stuck blade. Designed for vertical or horizontal installation after the draft hood, this is the industry standard for 12" automatic vent dampers.

• Optimal Heat Retention: Closes the vent pipe during standby modes to trap heat within the heat exchanger and conditioned space.
• Burner Safety Interlock: Integrated secondary switches prevent combustion unless the 12-inch blade is confirmed open.
• Universal 24V Logic: Compatible with any 24 VAC, 60hz gas system, supporting a wide range of commercial and residential atmospheric appliances.
• Durable Stainless Construction: Withstands high-temperature flue gases and acidic combustion byproducts without degrading.
• Manual Service Mode: Includes a technician-friendly switch to lock the damper open for maintenance and system testing.

• Does this include the wiring harness? This model (46487601) is sold "without harness" for contractors who are reusing existing wiring or using a specific Field Controls adapter kit.
• Can I manually turn the damper blade? Do not manually force the blade, as this can damage the motorized gear train. Use the integrated "Hold Open" switch for manual positioning.
• Will this work with oil-fired systems? No, the GVD series is strictly rated for 24V gas systems; oil systems require the OVD series dampers.
• What is the direct replacement for the Q35RQ-1? The Field Controls 46487601 is the official direct replacement for that discontinued model.

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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.