ACV Electrode l215mm straight dual ceram. 537DZ028

The ACV Electrode l215mm straight dual ceram. 537DZ028 is a straight ionization and ignition electrode with a length of 215 mm and two ceramic insulators. It is designed for use in ACV boilers, including models A27 (A48), Prestige 120 V14, CA 400 Compact, CA 600 Classic, and CA 800 Comfort. This electrode either delivers the ignition spark or proves the flame by conducting a rectified current, depending on the burner design. It is resistant to soot, which helps maintain operation in combustion environments.

When selecting a replacement electrode of this type, key parameters to match include overall length, insulator shape (straight, stepped, or tapered), gap dimension if combined ignition-ionisation, mounting flange pattern, and the specific burner series. Before fitting, compare the new electrode with the removed part for tip shape, bend angle, and reach into the combustion chamber. Ensure the electrode is aligned so the spark gap or flame-sensing tip sits correctly relative to the burner head or pilot outlet. For ionisation probes, verify compatibility with the burner control box and check wiring integrity.

Common failure modes include erosion of the metal tip, cracking or glazing of the ceramic, carbon build-up creating a conductive path to earth, and gradual widening of the spark gap causing unreliable ignition. Sooting or cracked ceramic can lead to nuisance lockouts. Symptoms on the equipment include ignition failure, flame loss, or repeated lockouts. Check the electrode for visible damage, carbon deposits, and proper gap alignment.