Baxi Ecogen 24/1.0 Installation & Servicing Instructions Manual page 58

Wait a minimum of 6 minutes 30 seconds before working on the interior components to allow the capacitor to discharge.
See Section 13.3 "Servicing" for removal of case panel, door etc.
14.1 Supplementary & Engine Igniter (Fig. 56)
1. Disconnect the igniter plug and the electrode leads, noting their positions.
2. Undo the screws securing the igniter and remove it being careful to retain the washers.
3. Reassemble in reverse order.
14.2 Supplementary Igniter and Sensing Electrodes (Fig. 57)
1. Disconnect the electrode leads, noting their positions.
2. Remove the retaining screws securing each of the electrodes to the burner door and withdraw the electrodes.
3. Replace the sealing gaskets.
4. Reassemble in reverse order.
Fig. 56
Fig. 57 & Fig. 58
14.3 Engine Igniter and Sensing Electrodes (Fig. 58)