Cofi Ignition transformer TRS1020/21

The Cofi Ignition Transformer TRS1020/21 is an electronic, bipolar ignition transformer designed for gas burners. It operates on a 230 V supply at 50 Hz and provides a secondary voltage of 10–10 kV across two poles. This intermittent duty unit features silicone-insulated ignition cables and is manufactured in Italy. It is compatible with Cofi, Riello, Ecoflam, and CIB Unigas burners.

When selecting an ignition transformer of this type, ensure the primary voltage (e.g., 230 V) and frequency match the burner's supply. The secondary voltage must be sufficient for the electrode gap, and the mounting dimensions and terminal configuration must align with the burner housing. Verify the cable connector pattern and that the ignition cables are properly insulated to prevent spark leakage. Always inspect the high-voltage cables and spark electrodes during replacement.

Typical failures include weak or no spark, often caused by a faulty transformer or degraded ignition cables. Hardened or cracked silicone insulation can leak the spark to earth, mimicking a transformer issue. Check the primary voltage, secondary output, and condition of cables and electrodes to diagnose the problem.