Cofi Ignition transformer TRS820P/43

The Cofi TRS820P/43 is an ignition transformer designed for gas and diesel burners. It generates a high-voltage spark to ignite fuel, ensuring stable burner startup. The transformer features a compact housing and insulated secondary wiring. It is intended for use in heating systems where consistent ignition is required.

When selecting a replacement ignition transformer, ensure the primary voltage, secondary voltage and current, duty cycle, mounting type, and terminal configuration match the existing system. The cable connector pattern must also match the existing wiring. Inspect the ignition cable for damage before installation, as a faulty cable can cause spark leakage.

Common failure modes include cracked or hardened ignition cables, which can leak the spark to earth, causing ignition failure. The burner may fail to start or exhibit intermittent operation. Check the cable condition and transformer output before condemning the transformer.