Field Controls 46487301 Vent Damper Freon the York S1-3924-3021 is rated

the York S1-3924-3021 is rated for standard high-pressure refrigerants used in modern HVAC equipment

The dual-powered design supports either a hardwired "C" wire or battery operation via two AA batteries

Optimized Actuator Performance: Minimizes friction between the valve stem and the gland nut

Premature failure is typically caused by improper voltage supply

as an official Source1 component

Field Controls 46487301 Vent Damper Freon the York S1-3924-3021 is ratedThe Field Controls 46487301 (Model GVD 8PL) is a heavy duty, 8 inch automatic gas vent damper designed for seamless integration with 24Vac heating systems. This stainless steel vent damper serves as a direct replacement for Q35RJ 1 and is compatible with both intermittent ignition and standing pilot systems. Engineered to optimize gas boiler efficiency, the motor driven assembly automatically closes the flue during off cycles to prevent conditioned