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Refit in the reverse order. If the microswitch leads cannot be easily attached to the
5.
interrupter block when it is fully tightened to the gas shut-off tap, slacken it and rotate to
allow the leads to be fitted. Retighten making sure that the leads remain in place in the
interrupter block. Fit and tighten the thermocouple nut making sure that the leads are
secured in the interrupter block to give a good electrical contact.
16.10 To Remove the Pilot Unit
1.
Remove the burner unit - See section
16.6.
2.
If lying the burner on its back, 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 59)
3.
Detach the pilot pipe from the gas shut-
off tap.
4.
Detach the thermocouple from the
interrupter block by unscrewing the
thermocouple nut.
5.
Detach the electrode lead from the underside of the electrode tab.
6.
Remove the first screw securing the dust cage to the pilot unit & burner. Carefully
remove the dust cage and place aside. See figure 62.
7.
Remove the second screw securing the pilot unit to the burner. Remove the pilot unit
and place it aside. See figure 62.
8.
Disconnect the pilot pipe from the pilot unit elbow.
9.
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.
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.
INSTALLER'S GUIDE
Page 43
Figure 62. Pilot unit removal
(Dust cage not shown for clarity)
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