UA-9978659-1
UA-9978659-1
is a 4-inch diameter vent damper constructed from stainless steel for corrosion resistance. It is a critical safety and efficiency component for 24 VAC gas-fired heating appliances.
It includes dual internal safety switches that prevent the burner from firing unless the damper is confirmed to be in the fully open position.
, a series of automatic gas vent dampers used in residential and commercial HVAC systems. These devices are designed to improve energy efficiency by preventing heat from escaping through the chimney when a gas boiler is in standby mode. Technical Overview: The GVD-4 Series The Field Controls GVD-4PL
The unit is installed in the vent pipe after the draft hood or draft control. It often requires a specific Wiring Harness for connection to the appliance. Specifications
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