Cofi Ignition transformer TRS818C/S2

The Cofi TRS818C/S2 is an ignition transformer designed for use in gas and diesel burners, as well as equipment operating on light and heavy liquid fuel. It operates on a 240 V, 50 Hz supply and provides a secondary voltage of 8 kV. The transformer measures 110 mm in length, 90 mm in width, and 70 mm in height, and features a robust housing. It is manufactured in Italy.

When selecting an ignition transformer of this type, verify that the primary voltage, frequency, and secondary voltage match the burner's requirements. Check the mounting dimensions and terminal configuration to ensure compatibility with the existing setup. The transformer is typically energized only during the ignition phase, so confirm the control system's output matches the transformer's specifications.

Common failure modes for ignition transformers include internal short circuits, open windings, or insulation breakdown, which can result in weak or no spark at the ignition electrode. Symptoms may include burner ignition failure or intermittent operation. Before replacing the transformer, inspect the high-voltage cables and connectors for damage, as cracked insulation can cause spark leakage and mimic transformer faults.