Valor BR622 Installer's Manual page 27

figure 54
Shut off tap (view from rear with
burner turned over)
15.10.3 Detach the pilot pipe from the tap.
15.10.4 Detach the inlet pipe.
15.10.5 Remove the hexagonal nut securing the
tap to the mounting bracket.
15.10.6 Detach the elbow by unfastening the
hexagonal nut connecting it to the flow
rate controller. Lift the tap (complete
with elbow) clear
15.10.7 Loosen the hexagonal locknut securing
the elbow to the tap. Remove the
elbow by rotating it.
15.10.8 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.
15.11 TO REMOVE THE GAS FLOW RATE
CONTROLLER (See figure 55)
15.11.1 Remove the burner unit - See 15.6.
15.11.2 Detach the microswitch cover - See
section 15.1.2.
15.11.3 Detach the shut-off tap as detailed in
sections 15.10.2 to 15.10.6
INSTALLER GUIDE
15.11.4 Detach the burner pipe from the
15.11.5 Remove the nut and washer securing
15.11.6 Remove the hexagonal bolt securing
15.11.7 Detach the control pivot bracket.
15.11.8 Remove the hexagonal nut securing the
15.11.9 Refit in the reverse order.
15.12
15.12.1 Remove the burner unit - See section
15.12.2 Disconnect the main burner pipe from
15.12.3 Unscrew the injector from the injector
15.12.4 Refit in the reverse order.
Page 27
controller. Support the controller while
detaching to prevent excessive strain.
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.
the control pivot bracket to the
controller at the rear.
controller to the front mounting bracket
and remove the flow rate controller.
figure 55
Gas flow rate controller
TO REMOVE THE MAIN BURNER
INJECTOR (See figure 56)
15.6.
the injector at the venturi end. If
necessary, loosen the pipe at the flow
rate controller end to swing the pipe
clear of the injector.
carrier which is on the other side of
the injector bracket.
figure 56
Burner injector removal