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7. Loosen the hexagonal locknut
securing the elbow to the tap.
Remove the elbow by rotating it.
8. If fitting a new tap, remove the
hexagonal nut at the mounting
bracket end of the old tap and fit to
the replacement tap. Prior to
refitting the elbow to the shut-off
tap, apply an approved sealant to
the elbow thread. Refit in the
reverse order.
Refer to figure 50 to ensure
accurate refitting dimensions of the
valves and subsequently into the
mounting bracket. When refitting, make sure that the tap spindle is in the correct
relationship relative to the control pivot bracket. Rotate the pivot bracket fully
clockwise. The tap spindle should "bottom out" (i.e. the tap should be fully open) after
the pivot bracket has actuated the ignition microswitch but before it has pushed the
microswitch leaf against the microswitch
body.
When refitting the thermocouple and
interrupter block, make sure that the
microswitch wires are properly secured to
give a good electrical contact.
17.11 To Remove the Gas Flow Rate
Controller
See figure 51.
1. Remove the burner unit - See section
17.6.
2. If lying the burner on its back, ensure
that the worksurface is suitably protected
This will avoid damage to the worksurface.
3. Detach the microswitch cover - See
section 17.2 paragraph 2.
4. Detach the shut-off tap as detailed in section 17.10 paragraphs 2-6.
5. Detach the burner pipe from the controller. Support the controller while detaching to
prevent excessive strain.
6. Remove the nut and washer securing the control pivot bracket to the controller at the
front. Support the pivot bracket while removing the nut to prevent possible damage to
INSTALLER GUIDE
Figure 50. Refitiing dimensions of valves
into mounting bracket.
Figure 51. Flow rate controller
Page 35
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