Kromschroder Ignition transformer TZI8-12/100WZ 74923417

The Kromschroder TZI8-12/100WZ is an ignition transformer designed for high-voltage spark ignition of gas burners and gas-ignited or directly ignited oil burners. It steps up the mains voltage to produce a spark across the ignition electrode gap. The transformer is energized only during the ignition phase, controlled by the burner control unit. It can be used with single electrode operation, where ignition and ionization currents flow over a common electrode. The unit must be mounted in a housing, such as a control cabinet, and meets IP20 enclosure requirements.

When selecting an ignition transformer of this type, the primary voltage (typically 230 V, but 110 V and 24 V variants exist), secondary voltage and current, duty cycle, and mounting arrangement must match the burner design. The terminal pattern and cable connector type must correspond with the existing wiring. The ignition cable connecting the transformer to the electrode must be silicone-insulated to withstand high voltage and ambient heat. Always inspect the cable and electrode condition before replacing the transformer.

A cracked or hardened ignition cable can leak the spark to earth, which may be mistaken for a faulty transformer. If the transformer fails, the burner may not ignite or may have intermittent ignition. Check the cable and electrode for damage or wear before replacing the transformer itself.