Baxi BOSTON 40 OF, Installation And Servicing Instructions

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and slide down ( Fig 16 ).
7) Replace insulation as necessary and bend down securing tabs where applicable.
8) Re­assemble in reverse order of dismantling taking care not to damage the new insulation.
PIEZO UNIT ( Fig 15 )
1) Remove the burner and controls assembly as described in steps 1 to 6 ­ Servicing the Unit .
2) Disconnect the electrode lead at the piezo unit.
3) Remove the nut securing the piezo unit to the heat shield and remove the piezo unit.
4) Re­assemble in reverse order of dismantling.
SPARK ELECTRODE ( Fig 15 )
1) Remove the burner and controls assembly as described in steps 1 to 6 ­ Servicing the Unit .
2) Disconnect the electrode lead at the electrode.
3) Remove the nut securing the electrode and remove the electrode.
4) Re­assemble in reverse order of dismantling.
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fig 15 ­ Control Assembly