78
Reassemble the brazier using the
following procedure:
•
Fit the moveable brazier base
assembly to the burner and
reconnect the pushrod to the
motor shaft using the cap screw.
•
Whilst operating the servo motor
release switch, push the brazier
base assembly fully back into the
brazier chassis.
•
Insert the brazier clearance gauge
plate (supplied with the boiler)
between the brazier chassis and
brazier base assembly. Refer to
Figure 11-13.
•
The clearance gauge should slide
in using manual force only.
DO
NOT FORCE THE GAUGE INTO
THE BRAZIER!
•
Reassemble the remainder of the
brazier, using the reverse of the
dismantling procedure.
•
Leave all screws loose until all
components (excluding the burner
hood) are assembled correctly.
•
BEFORE fitting the burner hood,
tighten the two screws securing the
photocell back plate to the front of
the burner.
•
Fit the burner hood and then finally
tighten all remaining burner fixings.
•
Remove brazier clearance gauge
from burner brazier.
•
Operate servo motor release
switch and manually open and
close brazier to check it is free to
move.
11.8 Burner Components
11.8.1 Burner Fan
Check the burner fan inlet is clear of
debris.
If there is a build-up of debris remove
fan from burner and clean the fan
blades and fan housing. Refer to Figure
11-14 and 11-15.
11.8.2 Ignition Element
Remove and check the condition of the
ceramic heating element. Replace if
damaged.
To remove the element from the tube,
grasp the black grommet and pull out
of the tube. Do NOT pull on the element
power cable.
Unscrew and remove the single screw
securing the ignition element tube and
pull it out of the burner.
Check the condition and thoroughly
clean the inside of the tube. Replace
the tube in the burner and secure with
the screw.
Check that the ceramic element is
correctly fitted into the ceramic socket.
Replace the ignition element in the
tube, ensuring that the element is
correctly positioned inside the tube,
i.e. with a distance of 127mm between
the grommet flange and the ceramic
socket. Refer to Figure 11-16.
11.8.3 Photocell
Remove photocell from mount. Check
and clean the photocell. Replace if
damaged.
Remove the two screws securing
the photocell mount and pull out the
photocell tube. Check the condition and
thoroughly clean the inside of the tube.
Refit tube to burner.
Ensure the photocell clamp is fitted
25mm from end as shown in Figure
11-17. Refit into photocell mount.
11.8.4 Pellet Feed Tube
Unscrew the three fixing screws and
remove the feed pipe and gasket from
the top of the burner.
Check the condition of the gasket and
replace if necessary.
Check the condition of the feed tube
and thoroughly clean the inside.
Check that the pellet feed tube
thermostat is correctly mounted on the
side of the tube.
Replace on burner, ensuring gasket
is correctly fitted, and secure with the
three screws.
Figure 11-13:
Fitting brazier clearance
gauge
Figure 11-14:
Burner fan, photocell
and ignition element (5-18kW model
shown with air restrictor plate)
Figure 11-17:
Photocell clamp position
Figure 11-16:
Ignition element
Figure 11-15:
Burner fan, photocell
and ignition element (6-26 and 9-36kW
models)
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