77
DO NOT ATTEMPT TO FORCE
THE BRAZIER OPEN WITHOUT
OPERATING THE SERVO MOTOR
RELEASE SWITCH.
!
WARNING
11.7 Burner Brazier
11.7.1 Removal of Burner
To clean the burner thoroughly it will be
necessary to remove it from the boiler,
as follows:
•
Disconnect the three plugs from
the left side of the burner. Refer to
Figure 11-10.
•
Remove the red burner cover by
loosening the four M5 screws (two
each side of the cover) and lift it off
the burner.
•
Whilst supporting the burner,
unscrew and remove the two M8
burner securing nuts, one on each
side of the burner.
•
Carefully withdraw the burner from
the combustion chamber door
taking care not to damage the
burner door gasket.
•
Place the burner on a suitable
bench (e.g. portable ‘workmate’
type bench or similar) to work on.
11.7.2 Cleaning Burner Brazier
Dismantle and clean the burner as
follows:
•
Remove the burner hood by
loosening the two M5 bolts
(highlighted below) each side
of the brazier. Slide the hood
forwards and then up to disengage
the hood from the burner. Refer to
Figure 11-11.
•
With the brazier open, dismantle
the brazier to thoroughly clean all
parts as follows, referring to Figure
13-2:
•
Unscrew and remove the upper
two M6 nuts and washers on
either side of the brazier chassis,
securing the two brazier flame
plates.
•
Remove the four M6 screws from
the inside of the brazier.
•
Unscrew and remove the two M6
screws securing the photocell back
plate to the burner.
•
Remove both the two brazier flame
plates and photocell back plate
from brazier.
•
Unscrew and remove the two M6
nuts and washers on either side
of the brazier chassis securing the
3-sided grate enclosure
•
Remove the four M6 screws from
inside the brazier and remove the
grate enclosure.
•
Unscrew and remove the two
M6 screws and washers (one
each side of the brazier chassis)
securing the ignition element
mounting plate, and remove it from
the brazier chassis.
•
From below the burner, unscrew
and remove the single cap screw
attaching the push rod of the
moveable brazier base to the shaft
of the servo motor.
•
Disengage the push rod from the
motor shaft and remove brazier
base assembly from the brazier
chassis.
Inspect all components for distortion or
damage and replace if necessary.
Clean all ash and clinker deposits from
all surfaces (in particular the upper
surface of the brazier chassis and the
underside of the brazier base assembly)
using wire bush and, where necessary,
a flat scraper.
Ensure that all air holes are clear.
Ensure that electrical supply to the
hopper and boiler is isolated before
proceeding.
!
WARNING
Figure 11-10:
Burner plugs
Figure 11-11:
Removal of burner hood
Figure 11-12:
Manual opening of
brazier
•
Clean and inspect the hood for
any damage or distortion. Replace
if necessary. Remove all ash
deposits and check that all air
holes (on the inside surface of the
hood) are clear. Open the brazier
manually by operating the release
switch on the servo motor and
carefully pulling on the end wall of
the brazier.
•
To operate the switch and release
the motor, press and hold the
switch down. Refer to Figure
11-12.
Failure to operate the servo motor
release switch WILL result in
damage to the servo motor gears.
After a period of time in use, the
semi circular end wall of the brazier
hood may distort or show minor
cracks. This does not affect the
operation of the burner. The hood
should only be changed if there is
considerably deterioration.
!
WARNING
