Cofi Ignition transformer TRK2-40HK

The Cofi Ignition transformer TRK2-40HK is a compact high-voltage device used to generate a spark in automatic ignition systems for gas and liquid fuel burners. It operates with a supply voltage of 220–240 V and a frequency of 50–60 Hz. The transformer measures 170 mm in length, 90 mm in width, and 55 mm in height, with a net weight of 0.33 kg and a gross weight of 0.37 kg. It is designed to work with burner control and an ignition electrode, and the ignition cable is silicone-insulated. The article number is 309.820.039, and the manufacturer code is TRK2-40HK.

Parts of this type are selected by matching the primary voltage, secondary voltage and current, duty cycle, and physical mounting and terminal configuration to the existing installation. The cable connector pattern must match the existing ignition cable, and the mounting arrangement must align with the burner's design. Before ordering, verify the supply voltage and frequency against the burner control specifications, and ensure the transformer's dimensions fit the available space. The ignition cable should be inspected for hardening or cracks, as a damaged cable can cause spark leakage and mimic a faulty transformer.

When items of this kind fail, the burner may not ignite or may experience intermittent ignition. Common failure modes include internal short circuits, open windings, or insulation breakdown, which can result in no spark or a weak spark. The equipment may show a lockout condition on the burner control, or the ignition electrode may not produce a visible spark. Check the ignition cable for damage, as a hardened or cracked cable can leak the spark to earth and imitate a faulty transformer. Also, verify that the supply voltage is present and within the specified range.