INSTALLER’S GUIDE
Page 31
Figure 46. Pilot unit removal
(Dust cage not shown for clarity)
Figure 47. Shut-off tap (viewed from
rear with burner turned over)
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.
17.8
To Remove the Pilot Unit
1.
Remove the burner unit - See section 17.5.
2.
Detach the pilot pipe from the gas shut-off
tap.
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.
5.
Remove the first screw securing the dust cage to the pilot unit & burner. Carefully
remove the dust cage and place aside. See figure 46.
6.
Remove the second screw securing the pilot unit to the burner. Remove the pilot unit
and place it aside. See figure 46.
7.
Disconnect the pilot pipe from the pilot unit elbow.
8.
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.
17.9
To Remove the Shut-Off Tap
See figure 47.
1.
Remove the burner unit - See section 17.5.