Worcester 24ijunior Installation And Servicing Instructions page 26

Fig. 47. Spark electrode assembly.
3.5-4.5mm
2 Spark Electrode
Remove the inner casing cover and the combustion chamber cover.
Carefully pull off the lead from the electrode. Unscrew the screw
and remove the assembly. Refer to Fig. 48.
Ensure that the electrode is at the correct height above the
burner blade.
Fig. 49. Burner
3.5-4.5mm
2
Spark electrode
detail
3 Flame Sense Electrode
Remove the inner casing cover and the combustion chamber cover.
Carefully pull off the lead from the electrode assembly.
Remove the burner as described in the text following
Unscrew the screw and remove the assembly. Refer to Fig. 48.
Fig. 48. Flame sense electrode (rear view)
1
3
4 Burner
Remove the inner casing cover and the combustion chamber cover.
Carefully pull-off the connections to the spark electrodes and
disconnect the flame sense electrode. Unscrew the single screw
fixing the support bracket and withdraw the burner assembly. Refer
to Fig 49.
Flame sensor
detail
4
26
1. Flame sense electrode
2. Fixing screw
3. Burner blade assembly
3
1
1. Burner
2. Spark electrode assembly
5
3. Flame sensor
4. Burner injector
5. Support bracket fixing screw
2