The Ravenheat cable part is based near the electrodes. Usually, there are two types of electrode, ignition electrodes and flame sensing electrodes. The ignition electrode creates the spark that starts the burner. The flame sensing electrodes are responsible for checking if there is a flame present in the burner. This is an important safety device that makes sure the boiler isn't still supplying gas without a flame.
Fits a number of Ravenheat appliances
Technical specification
TypeElectrodeManufacturer Model No0012CAV03005/0Brand NameRavenheat