(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 42).
1. Remove the burner unit (See section
17.6).
2. If lying the burner on its back, ensure
that the work surface is suitably protected.
This will avoid damage to the work surface.
3. Detach the shut-off tap as detailed in
section 17.10 paragraphs 2-6.
4. Detach the burner pipe from the
controller. Support the controller while
detaching to prevent excessive strain.
5. 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 the microswitch.
6. Remove the hexagonal bolt securing the
control pivot bracket to the controller at the rear.
7. Detach the control pivot bracket.
8. Remove the hexagonal nut securing the controller to the front mounting bracket
and remove the flow rate controller.
9. Refit in the reverse order.
17.12 To replace the burner.
(See figure 43).
1. Remove the burner unit (See section 17.6).
2. Support the elbow injector and unscrew the
injector nut.
3. Remove the two screws from the burner
clamping plate (See figure 43)
4. Lift the right hand side of the burner, slide it to
the right and lift clear.
5. Refit in reverse order.
Page 40
© GDC Group Ltd. 2013
INSTALLER GUIDE
Figure 43. Removal of burner
Figure 42. Flow rate controller
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