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interrupter block to give a good electrical contact.
17.9 To Remove the Pilot Unit
1. Remove the burner unit - See section 17.6.
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 48.
7. Refit in the reverse order.
Note:
1.
atmosphere sensing device.
It must be replaced as a
whole assembly. Its
individual components are
not separately replaceable.
2.
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.
17.10 To Remove the Shut-Off Tap
See figure 49.
1. Remove the burner unit - See section 17.6.
2. Turn the burner unit upside down. Detach the thermocouple and interrupter block
from the tap - See section 17.8 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.
INSTALLER GUIDE
The pilot unit is an
When the
Figure 48. Pilot unit removal
Figure 49. Shut-off tap (Viewed from
rear with burner turned over)
Page 34
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