Cofi Ignition transformer TRS820P/18

The Cofi Ignition transformer TRS820P/18 is a high-voltage transformer designed for stable ignition of low-power diesel and heavy oil burners. It operates from a 240 V, 50 Hz supply and is used in heating boilers, heat generators, and industrial equipment. The body is made of durable heat-resistant materials, and the ignition cable is silicone-insulated. This transformer operates only during the ignition phase, as commanded by the burner control. It is manufactured in Italy.

Parts of this type are selected primarily by secondary voltage and current, primary voltage, duty cycle, and physical mounting and terminal configuration. The most common primary voltage is 230 V, but 110 V and 24 V variants exist. The cable connector pattern and the type of high-voltage cable are also relevant; ignition cables use silicone insulation to withstand high temperature and voltage. When replacing such a transformer, ensure the replacement matches the original mounting dimensions and terminal arrangement to fit the burner assembly without modification.

When items of this kind fail, the burner may not ignite or may have intermittent ignition. A damaged ignition cable can leak the spark to earth, which may appear as a transformer fault when the transformer itself is functional. Inspect the ignition cable for hardening or cracking, and check for proper spark at the electrode gap.