microswitch but before it has pushed the microswitch leaf against the microswitchbody.When refitting the thermocouple and interrupter block, make sure that the microswitchwires are properly secured to give a good electrical contact.17.12 To remove the gas flow rate controller.(See figure 59).1. Remove the burner unit (See section17.7).2. If lying the burner on its back, ensurethat the work surface is suitablyprotected This will avoid damage to thework surface.3. Detach the microswitch cover (Seesection 17.2 paragraph 2).4. Detach the shut-off tap as detailed insection 17.11 paragraphs 2-6.5. Detach the burner pipe from thecontroller. Support the controller whiledetaching to prevent excessive strain.6. Remove the nut and washer securingthe control pivot bracket to the controllerat the front. Support the pivot bracketwhile removing the nut to preventpossible damage to the microswitch.7. Remove the hexagonal bolt securing the control pivot bracket to the controller atthe rear.8. Detach the control pivot bracket.9. Remove the hexagonal nut securing the controller to the front mounting bracketand remove the flow rate controller.10. Refit in the reverse order.17.13 To replace the burner.(See figure 60).1. Remove the burner unit (See section 17.7).2. Support the elbow injector and unscrew theinjector nut.3. Remove the two screws from the burner clampingplate (See figure 60)4. Lift the right hand side of the burner, slide it to theright and lift clear5. Refit in reverse order.Page 49© Baxi Heating U.K. Limited 2009.INSTALLER GUIDEFigure 60. Removal of burnerFigure 59. Flow rate controller