17.3 To remove the pilot unit.
1.
Remove the burner unit (See section 17.2)
2.
If lying the burner on its back, ensure that the work
surface is suitably protected. This will avoid damage to
the work surface.
3.
Detach the pilot pipe from the pilot unit.
4.
Detach the thermocouple from the gas valve
5.
Detach the electrode lead from the rear of the piezo
spark generator on the gas valve.
6.
Remove the two screws securing the pilot unit (See
figure 65).
7.
Refit in the reverse order.
Note: The pilot unit is an
atmosphere sensing device. It must be replaced as a whole assembly. Its individual
components are not separately replaceable.
17.4 To remove the gas valve.
(See figure 66).
1.
Remove the burner unit (See
section 17.2).
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.
3.
Detach the pilot pipe from the gas
valve.
4.
Detach the inlet pipe.
5.
Detach the injector pipe.
6.
Detach the electrode lead from the
rear of the piezo spark generator on
the gas valve.
7.
Remove the control knob by
pulling forward.
8.
Remove the thermocouple by unscrewing the thermocouple nut at the gas valve.
9.
Remove the hexagonal nut securing the gas valve to the mounting bracket.
10.
Remove the gas valve.
11.
Refit in the reverse order.
Page 41
INSTALLER GUIDE
Figure 66. Gas valve (Viewed from rear with
burner turned over)
Figure 65. Pilot unit removal
