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.
10.8
To remove the shut-off tap (see figure 32)
10.8.1
Remove the burner unit- See section 10.4
10.8.2
Turn the burner unit upside down. Detach
the thermocouple and interrupter block
from the tap - See sections 10.6.2 to
10.6.4.
10.8.3
Detach the pilot pipe from the tap.
10.8.4
Detach the inlet pipe.
10.8.5
Remove the hexagonal nut securing the
tap to the mounting bracket.
10.8.6
Detach the elbow by unfastening the
hexagonal nut connecting it to the flow
rate controller. Lift the tap (complete with
elbow) clear
10.8.7
Loosen the hexagonal locknut securing
the elbow to the tap. Remove the elbow
by rotating it.
10.8.8
If fitting a new tap, remove the hexagonal
nut at the mounting bracket end of
the old 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. When
refitting the burner unit, make sure that
the tab at the right side of the battery
box is in front of the “L” shaped bracket
which projects up from the fire case base.
See figure 29.
10.9
To remove the gas flow rate controller
(see figure 33)
10.9.1
Remove the burner unit- See section 10.4
10.9.2
Detach the microswitch cover - See
section 10.1.2.
10.9.3
Detach the shut-off tap as detailed in
sections 10.8.2 to 10.8.6
10.9.4
Detach the burner pipe from the
controller. Support the controller while
detaching to prevent excessive strain.
10.9.5
Remove the nut and washer securing the
control pivot bracket to the controller at
the front. Support the pivot bracket while
removing the nut to prevent possible
damage to the microswitch.
10.9.6
Remove the hexagonal bolt securing the
control pivot bracket to the controller at
the rear.
10.9.7
Detach the control pivot bracket.
10.9.8
Remove the hexagonal nut securing the
controller to the front mounting bracket
and remove the flow rate controller.
10.9.9
Refit in the reverse order. When refitting
the burner unit, make sure that the tab at
the right side of the battery box is in front
of the “L” shaped bracket which projects
up from the fire case base. See figure 29.
Page 18
figure 33
Flow rate controller
INSTALLER GUIDE
Valor 600B610_01 7/12/00 3:23 PM Page 18
