Cofi Ignition transformer TRG1035/6

The Cofi TRG1035/6 is an ignition transformer designed for high-power gas, diesel, and heavy fuel oil burners. It operates on a 230 V, 50 Hz supply and provides a secondary voltage of 5 kV with an output current of 1. 9 A. The transformer measures 107 mm in length, 85 mm in width, and 80 mm in height, featuring a compact design for its class. Its induction design ensures stable spark generation for burner start-up under intensive use.

When selecting a replacement ignition transformer of this type, ensure the primary voltage, secondary voltage and current, duty cycle, mounting style, terminal type, and cable connector pattern match the existing installation. Common primary voltages include 230 V, 110 V, and 24 V. The secondary output must be sufficient to strike a spark under combustion chamber conditions. Check the condition of ignition cables, as hardened or cracked silicone insulation can leak the spark to earth, which may be misinterpreted as a faulty transformer.

Typical failures of ignition transformers include internal short circuits, open windings, or insulation breakdown, leading to weak or no spark at the ignition electrode. Equipment may fail to ignite, causing burner lockout or repeated ignition attempts. Check for visible damage, listen for buzzing sounds, and measure primary and secondary voltages with a multimeter to diagnose. Also inspect ignition cables for cracks or hardening, as these can cause spark leakage and mimic transformer failure.