Trasformatore di accensione Kromschroeder TZI5-15/20W (84335623)

The Kromschroeder TZI5-15/20W (article 624.820.005, manufacturer code 84335623) is an ignition transformer for burners and industrial heating systems. A part of this type steps mains voltage up to the level required to produce a spark across the ignition electrode gap. It is energised only during the ignition period, under command from the burner control. Ignition transformers are selected by secondary voltage and current, primary voltage (230 V is common, but 110 V and 24 V versions exist), duty cycle, and the physical mounting and terminal arrangement. The cable connector pattern must also match; ignition cables use silicone insulation to withstand high voltage and heat, and a hardened or cracked cable can leak the spark to earth and imitate a faulty transformer. In a burner system, the ignition transformer operates after the pre-purge phase. The burner control opens the fuel valve and simultaneously energises the transformer to create a spark on the ignition electrode. Once the flame is established and proved by the ionisation electrode or UV detector, the transformer is de-energised. A part of this type works with the burner control, the ignition electrode, and the high-tension cable. If the transformer fails, the burner may not light or will lock out. When replacing, confirm that the primary voltage matches the supply, the duty cycle suits the application (intermittent operation, typically a short spark per burner cycle), and the mounting dimensions and terminal type fit the existing assembly. Check the condition of the ignition cable and electrode gap, as a weak spark may originate in those components rather than the transformer. Always compare the manufacturer code and catalogue article to ensure the correct unit is selected.