Cofi Ignition transformer TRS820

The Cofi Ignition transformer TRS820 is a step-up transformer designed for gas and diesel burners. It operates on a 230 V, 50 Hz supply and provides a secondary voltage of 8 kV. The transformer is active only during the ignition phase, generating a spark to ignite the fuel. It features a durable housing and silicone-insulated ignition cable, with dimensions of 110x90x70 mm. This item is manufactured in Italy and has the article number 309.820.045.

When selecting an ignition transformer of this type, ensure the primary voltage, secondary voltage, and frequency match the burner's requirements. The physical dimensions and mounting configuration must fit the existing space and harness. The cable connector pattern should align with the burner's wiring. Verify the duty cycle and terminal configuration to ensure compatibility with the control system.

Failure of this type of transformer often results in no spark or weak spark during ignition, causing the burner to fail to light or to ignite erratically. Common causes include a hardened or cracked ignition cable that leaks voltage to ground, or a faulty electrode. Inspect the cable and electrode condition as part of troubleshooting, as these issues can mimic transformer failure.