Cofi Ignition transformer TRS820/S

The Cofi TRS820/S is an ignition transformer designed for use in low-power diesel and heavy oil burners. It operates on a 230 V, 50 Hz supply and is manufactured in Italy. The transformer features silicone-insulated ignition cables and has a compact design, making it suitable for installation in various burner types. It provides a stable high-voltage spark for ignition during burner startup.

When selecting an ignition transformer of this type, key parameters to match include primary voltage (typically 230 V, but also 110 V or 24 V), secondary voltage and current, duty cycle, mounting style, terminal type, and cable connector pattern. The physical dimensions and mounting configuration must be compatible with the burner. Always consult the burner documentation to ensure correct fit and electrical ratings.

Common failure modes for ignition transformers include cracked or hardened ignition cables, which can leak the spark to ground, causing weak or no spark. This may appear as a faulty transformer, but the cable should be inspected first. Other issues include internal short circuits or open windings, leading to no spark output. The burner may fail to ignite or may shut down during operation if the transformer fails.