Cofi Ignition transformer TRG623PC

The Cofi TRG623PC is an ignition transformer designed for gas burners, diesel burners, and equipment using light or heavy liquid fuel. It operates from a 110 V, 60 Hz power supply and delivers an output current of 1.5 A to generate a high-voltage spark for fuel ignition. This model is part of the TRG series, intended for systems with demanding ignition requirements. The transformer is suitable for new installations or as a replacement unit in various burner types.

When selecting a replacement ignition transformer of this type, verify that the primary voltage (e.g., 110 V or 230 V), frequency, and output current match the burner's requirements. The physical mounting footprint and terminal arrangement must align with the existing wiring harness, as different manufacturers use different plug layouts. Check the electrode gap and ensure the ignition cables are in good condition, as hardened or cracked cables can cause spark leakage. The transformer is energized only during the ignition phase, controlled by the burner's control system.

Common failure modes for ignition transformers include internal short circuits, open windings, or insulation breakdown, which can result in no spark or a weak spark at the electrode. Symptoms on the equipment include failure to ignite, intermittent ignition, or the burner locking out after repeated ignition attempts. Check the transformer's primary and secondary circuits with a multimeter, and inspect the high-voltage cables for damage or moisture, as these can mimic transformer faults.