Cofi Ignition transformer TRS820P/11

The Cofi TRS820P/11 is an ignition transformer designed for use in oil burners, providing a single high-voltage output of 8 kV (peak 11 kV) to ignite fuel. It operates on a 230 V, 50 Hz supply, with a secondary current of 20 mA and a duty cycle of 25% ED within 4 minutes. This traditional electromagnetic transformer features a grounded pole, robust epoxy insulation, and is rated IP00. It measures 150 x 86 x 66 mm, weighs 1.88 kg net, and is manufactured in Italy, complying with CEI EN 61558-2-3 standards. The transformer is compatible with burners from Riello, Ecoflam, FBR, Baltur, Lamborghini, Bentone, and Giersch.

When selecting a replacement ignition transformer of this type, verify that the primary voltage, secondary voltage, and secondary current match the system requirements. The duty cycle, mounting configuration, terminal type, and high-voltage cable connector pattern must also be compatible. Measure the physical dimensions to ensure proper fit, and confirm the connector size for the ignition cable (e.g., ø 4mm).

Common failure modes include internal short circuits or open windings, leading to weak or no spark. The burner may fail to ignite or lock out after repeated attempts. Check the high-voltage cable for hardening or cracks, as leakage can mimic transformer failure. Inspect connections and the electrode gap before replacing the transformer.