ACV Electrode 537DZ022

The ACV Electrode 537DZ022 is a combined ignition and ionization electrode designed for use in the flame zone of ACV Prestige 47-64-85 burners. It delivers the high-voltage spark to ignite the fuel-air mixture and also proves the flame by conducting a small rectified current. This consumable part is resistant to soot buildup and is discontinued, with a recommendation to select a compatible current equivalent. The manufacturer code is 537DZ022, and it supersedes part number A25.

When selecting a replacement electrode of this kind, critical parameters include overall length, rod bend, ceramic insulator diameter, spark gap, and mounting flange pattern. Burner manufacturers shape electrodes specifically for a given combustion head geometry, so a mismatched electrode can shift the spark position or alter flame signal strength. During installation, verify that the ceramic is clean and free of cracks, and set the gap to the correct value for the burner. Parts of this type are located in the burner's flame zone and should be inspected whenever the burner is serviced.

Common failure modes for electrodes of this kind include erosion of the metal tip, cracking of the insulator from thermal shock, soot buildup that insulates the ionisation current, and gradual widening of the spark gap. These issues can lead to ignition failures, nuisance lockouts, or a degraded flame signal that prevents the burner control from proving flame within the safety time. Check the electrode for wear, cracks, and soot accumulation during routine burner maintenance.