INSTALLER’S GUIDE
Page 45
Figure 61. Shut-off tap (viewed from
rear with burner turned over)
2.
Once removed, ensure that the dust cage is cleaned before refitting. Make
sure that it locates squarely onto the pilot unit without any gaps between the
cage edges and the pilot unit.
3.
When the thermocouple is removed from the interrupter block, the
microswitch lead terminals in the interrupter block will be loose. Make sure
that they are properly secured to give a good electrical contact when
retightening the thermocouple nut.
16.11
To Remove the Shut-Off Tap
See figure 61.
1.
Remove the burner unit - See section
16.6.
2.
Unscrew and remove the two ceramic
support brackets from the top of the
burner unit. This will avoid damage to
the brackets and the worksurface (see
figure 57) Turn the burner unit upside
down. Detach the thermocouple and
interrupter block from the tap - See
section 16.8 paragraphs 2 - 4.
3.
Detach the pilot pipe from the tap.
4.
Detach the inlet pipe.
5.
Remove the hexagonal nut securing
the tap to the mounting bracket.
6.
Detach the elbow by unfastening the hexagonal nut connecting it to the flow rate
controller. Lift the tap (complete with elbow) clear.
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. Refit in the reverse order. 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.
