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INSTALLER GUIDE
16.10 To remove the pilot unit.
1. Remove the burner unit - See section 16.7.
2. Detach the pilot pipe from the pilot unit.
3. Detach the thermocouple from the interrupter
block by unscrewing the thermocouple nut.
4. Detach the electrode lead from the underside of
the electrode tab.
6. Remove the two screws securing the pilot unit
(See figure 37).
7. Refit in the reverse order.
Note:
1. The pilot unit is an atmosphere
sensing device. It must be replaced as
a whole assembly. Its individual
components are not separately
replaceable.
2. 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 38).
1. Remove the burner unit - See
section 16.7.
2. If lying the burner on its back, ensure
that the work surface is suitably
protected This will avoid damage to the
work surface. Turn the burner unit
upside down. Detach the thermocouple
and interrupter block from the tap - See
section 16.9 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
INSTALLER GUIDE
Figure 38. Shut-off tap (Viewed from rear
with burner turned over)
Figure 37. Pilot unit removal
35
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