7. Loosen the hexagonal locknut securingthe elbow to the tap. Remove the elbow byrotating it.8. If fitting a new tap, remove the hexagonalnut at the mounting bracket end of the oldtap and fit to the replacement tap. Refit inthe reverse order. When refitting, make surethat the tap spindle is in the correctrelationship relative to the control pivotbracket. Rotate the pivot bracket fullyclockwise. The tap spindle should “bottomout” (i.e. the tap should be fully open) afterthe pivot bracket has actuated the ignitionmicroswitch but before it has pushed themicroswitch leaf against the microswitch body.When refitting the thermocouple and interrupter block, make sure that the microswitchwires are properly secured to give a good electrical contact.17.15 To remove the gas flow rate controller.(See figure 46).1. Remove the burner unit (See section 17.11).2. If lying the burner on its back, ensurethat the work surface is suitablyprotected. This will avoid damage to thework surface.3. Detach the shut-off tap as detailed insection 17.14 paragraphs 2-6.4. Detach the burner pipe from thecontroller. Support the controller whiledetaching to prevent excessive strain.5. 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.6. Remove the hexagonal bolt securingthe control pivot bracket to the controllerat the rear.7. Detach the control pivot bracket.8. Remove the hexagonal nut securing the controller to the front mounting bracketand remove the flow rate controller.9. Refit in the reverse order.© Baxi Heating U.K. Limited 2008. Page 41Figure 45. Shut-off tap (Viewed fromrear with burner turned over)Figure 46. Flow rate controllerINSTALLER GUIDE