16.4 To remove the gas valve.
(See figure 29).
1.
Remove the burner unit (See
section 16.2).
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.
Detach the thermocouple from the
tap
3.
Detach the pilot pipe from the
tap.
4.
Detach the inlet pipe.
5.
Detach the injector pipe
6.
Detach the electrode lead from
the base of the electrode
7.
Remove the control knob by pulling forward.
8.
Remove the gas valve spindle extension by removing the screw that secures it to the
gas valve spindle.
9.
Remove the thermocouple by unscrewing the thermocouple nut at the gas valve.
10.
Remove the hexagonal nut securing the gas valve to the mounting bracket.
11.
Remove the gas valve
12.
Refit in the reverse order.
16.5 To remove the piezo generator.
1.
Remove the gas valve as section 16.4.
2.
Make sure that the tap is in the off position.
3.
Remove the circlip holding the piezo unit to the tap. Remove the piezo unit.
4.
Replace in the reverse order.
16.6 To grease the control tap.
1.
Detach the tap and remove the piezo generator as section 16.5 making sure that the
tap is in the ‘off’ position.
2.
Remove the two screws from the head of the tap. Remove the niting head and
spindle complete with collar and spring.
3.
Note the position of the slot in the plug - mark its position on the tap body.
4.
Remove the plug rotating slightly while pulling.
5.
Clean and grease the plug lightly with suitable grease. Do not apply excessive
grease. Particularly, make sure that the gas ports in the tap are not restricted by grease.
6.
Push the plug into the tap body and position the slot in line with the mark previously
Page 30
INSTALLER GUIDE
©
Baxi Heating U.K. Limited 2007.
Figure 29. Gas valve (Viewed from rear with
burner turned over)
