De Dietrich 95100254 Motor-Abgasklappe STA13B0.36

This motor flue damper, listed under the De Dietrich brand with article number 95100254 and also referenced as 192.712.012, is a component of the flue gas path in a boiler or burner system. Parts of this type are motor-driven and are installed in the flue outlet to open or close the passage for combustion products. They are controlled by the burner control, which positions the damper according to the operating sequence: normally closed when the burner is off to reduce standby heat loss, and opened during the pre-purge, firing, and post-purge phases to allow flue gas to exit safely. In room-sealed appliances, such dampers may also be part of the air intake side. When selecting a replacement motor flue damper, the key parameters are the flue duct diameter, the actuator voltage and control signal (on/off or modulating), and the mechanical interface such as mounting flange pattern and shaft coupling. The material must be suitable for the flue gas temperature class of the appliance. Since the damper is a safety-related component, it must be matched to the burner control logic to ensure correct opening before ignition and closing after shutdown. Note that some systems use a position feedback switch to confirm the damper state. During replacement, check that the actuator wiring matches the old unit and that the damper blade moves freely. A seized or slow damper can cause flue gas spillage or burner lockout. Also verify that the flue gas temperature does not exceed the damper’s rating. If the damper is installed in a condensing application, ensure condensate drainage is not obstructed by the damper position. Always confirm the correct orientation for flow direction if marked.