Cofi Ignition transformer TRG820PC/S

The Cofi TRG820PC/S is an ignition transformer designed for gas and diesel burners, boiler equipment, and industrial heating systems. It operates on a 230 V, 50 Hz supply and is energized only during the ignition phase. The transformer features silicone-insulated ignition cables and is manufactured in Italy. It is intended for use in automatic ignition systems, providing a high-voltage pulse for fuel ignition.

When selecting a replacement ignition transformer of this type, ensure the primary voltage (e.g., 230 V, 110 V, or 24 V), secondary voltage and current, duty cycle, mounting style, and terminal or connector pattern match the original. The transformer is energized only during the ignition phase under command from the burner control. Before ordering, verify the mounting form and electrical specifications against the existing unit.

Common failure modes for ignition transformers include internal short circuits, open windings, or insulation breakdown, leading to weak or absent spark. Symptoms on the equipment include burner ignition failure or intermittent starting. Check the high-voltage cable and electrode assembly for damage, as a hardened or cracked cable can leak spark to earth, mimicking a faulty transformer. Verify that the transformer receives the correct primary voltage and control signal during the ignition phase.