Kromschroder Ignition transformer TZI8-20/19WE 84391160

The Kromschroder TZI8-20/19WE ignition transformer (SKU 84391160) is a component of the burner ignition system. It steps up the mains voltage to produce a spark at the ignition electrode gap. The transformer operates only during the ignition period, under command from the burner control. Its secondary output is insulated, and the ignition cable is silicone-insulated for high voltage and heat resistance. When replacing this part, inspect the cable and electrode condition.

Parts of this type are selected by primary voltage (230 V is common, but 110 V and 24 V variants exist), secondary voltage and current, duty cycle, mounting arrangement, and terminal or connector pattern. The secondary output must match the electrode gap and control box specification. Confirm the electrical and mechanical specifications against the original before installation.

A hardened or cracked ignition cable can leak the spark to earth, mimicking a faulty transformer. When such a failure occurs, the burner may fail to ignite or exhibit intermittent sparking. Check the cable and electrode condition as part of troubleshooting.