Kromschroder Thermo pilot burner ZT40B-200A 84221023

Kromschroder Thermo pilot burner ZT40B-200A 84221023 is a thermoelectric pilot burner designed for safe ignition of main burners in gas thermal systems. It operates with natural gas or LPG, has a power rating up to 200 kW, and works in ambient temperatures from -20 °C. The burner uses an ionisation electrode or thermocouple for flame detection and weighs 0.7 g (net 0.0007 kg). It is a single-stage, industrial device from Germany, suitable for boilers and furnaces.

When selecting a pilot burner of this type, ensure the connection type, tube length, and mounting arrangement (flange or bracket) match the original to position the flame correctly. The flame shape and heat release must be equivalent to the previous unit to avoid unreliable ignition or sensor damage. Verify that the mounting flange or bracket aligns with the burner door or blast tube. Always replace the pilot burner as a complete assembly, not reusing old sensors or gaskets.

Common failures include blocked gas orifices from debris, sooting of the flame sensor due to impure combustion, and erosion of the flame tube tip from high temperature. If the burner control fails to detect flame after installation, check gas supply, purge air from the line, and measure ionisation current with a microamp meter.