To Remove The Gas Flow Rate Controller - Valor Visage 640 Installer's Manual

Remove the burner unit - See section 16.6.
1.
Unscrew and remove the two ceramic support brackets from the top of the burner unit.
2.
This will avoid damage to the brackets and the worksurface (see figure 62) Turn the
burner unit upside down. Detach the thermocouple and interrupter block from the tap -
See section 16.8 paragraphs 2 - 4.
Detach the pilot pipe from the tap.
3.
Detach the inlet pipe.
4.
Remove the hexagonal nut securing the tap to the mounting bracket.
5.
Detach the elbow by unfastening the hexagonal nut connecting it to the flow rate
6.
controller. Lift the tap (complete with elbow) clear.
Loosen the hexagonal locknut securing the elbow to the tap. Remove the elbow by
7.
rotating it.
If fitting a new tap, remove the hexagonal nut at the mounting bracket end of the old
8.
tap and fit to the replacement tap.
Refit in the reverse order. When
refitting, make sure that the tap
spindle is in the correct relationship
relative to the control pivot bracket.
Rotate the pivot bracket fully
clockwise. The tap spindle should
"bottom out" (i.e. the tap should be
fully open) after the pivot bracket
has actuated the ignition
microswitch but before it has pushed
the microswitch leaf against the
microswitch body.
When refitting the thermocouple and
interrupter block, make sure that the
microswitch wires are properly
secured to give a good electrical
contact.

16.12 To Remove the Gas Flow Rate Controller

See figure 67.
Remove the burner unit - See section 16.6.
1.
If lying the burner on its back, unscrew and remove the two ceramic support brackets
2.
from the top of the burner unit. This will avoid damage to the brackets and the
worksurface (see figure 62)
Detach the microswitch cover - See section 16.1 paragraph 2.
3.
Detach the shut-off tap as detailed in section 16.11 paragraphs 2-6.
4.
INSTALLER'S GUIDE
Figure 67. Flow rate controller
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