De Dietrich Gas nozzle 85565629

The De Dietrich gas nozzle 85565629, type designation 220B (DUESENSATZ KZ 220B), is a genuine spare part for De Dietrich gas boilers. It operates at 220 V and is designed to meter and direct gas flow into the combustion air stream within the burner mixing head. This nozzle ensures stable ignition and efficient combustion, and it is compatible with various De Dietrich boiler models. The article numbers are 85565629 and 336.736.004.

When selecting a replacement gas nozzle of this type, match the burner manufacturer's specification for gas type, burner output, and required gas pressure at the nozzle inlet. The nozzle orifice size determines flow rate at a given pressure, so compare the original part's dimensions and markings. Ensure sealing surfaces are clean and tighten to the correct torque to avoid leaks. Verify compatibility with the burner control and gas pressure switch settings after installation.

Gas nozzles of this kind can fail due to blockage from debris or corrosion, leading to uneven flame, poor combustion, or ignition failure. Symptoms include burner not starting, flame instability, or increased emissions. Check the nozzle for clogs, damage, or wear, and clean or replace as necessary.