Cofi Ignition transformer TRE820P/S

The Cofi TRE820P/S is a high-voltage ignition transformer designed for ignition in low-power diesel and heavy oil burners. It operates on a 230 V, 50 Hz supply and steps up the voltage to generate a spark across the ignition electrode gap. The transformer is housed in durable, heat-resistant materials and features silicone-insulated ignition cables. It is manufactured in Italy and is suitable for use in heating boilers, heat generators, and industrial equipment.

When selecting a replacement ignition transformer of this type, verify that the primary voltage (e.g., 230 V) and secondary output match the original. Check the mounting arrangement, terminal type, and connector pattern for the ignition cable. Ensure the duty cycle and physical dimensions are compatible with the burner's space constraints. Inspect the ignition cable and electrode gap for condition before installation.

Common failure modes for ignition transformers include internal short circuits, open windings, or insulation breakdown. Symptoms may include no spark at the electrode, weak or intermittent spark, or the burner failing to ignite. Check the transformer's primary voltage, secondary output, and the condition of the ignition cable and electrode gap. A hardened or cracked cable can leak spark to earth, which may be misinterpreted as a transformer fault.