Honeywell Ignition transformer ZT930 13124

The Honeywell Ignition transformer ZT930 13124 is a device that steps up a 220 V supply voltage to a secondary voltage of 15 kV, operating at a frequency of 50 Hz. It is designed for use in gas burners and boilers to generate a spark for ignition. The transformer has a maximum ambient temperature of 80 °C and an ingress protection rating of IP54.

When selecting a replacement ignition transformer of this kind, verify that the primary voltage matches the supply (e.g., 220 V), the secondary voltage and current rating are suitable for the electrode gap, and the mechanical connection type (mounting flange, terminal arrangement, and high-voltage cable connector pattern) is compatible with the existing unit. Also inspect the ignition cable for damage and ensure the electrode gap is correct before installation.

Common failure modes for ignition transformers include internal short circuits or open windings, often caused by overheating or moisture ingress. Symptoms on the equipment include no spark at the electrode, intermittent ignition, or burner lockout. Check the ignition cable for cracked or hardened insulation that may leak the spark to earth, and verify the electrode gap before condemning the transformer.