3.3 BURNERS
LH Burner
a) Remove combustion chamber facia box as Section
3.2.1.
b) Remove cross-over pipe by disconnectingunions
at LH burner and tee-piece in front of RH burner.
c) Remove igniter and flame sensing connections.
d) Ease burner upward out of front cradle. Slide it
slightly to right and withdraw forward from locating
pins on rear bracket.
e) Replace in reverse order. Ensure two burner
locating holes engage on two rear bracket locating
pegs. On G7204 and G7208 models, burner
should incline at 20
o
from the vertical toward side
panel. On G7211, burner should be upright in line
with combustion chamber side panel.
RH Burner
As Section 3.3 (a) to (c) then
f) Remove the RH panel as per Section 3.2.3.
g) Loosen the pipe union at the solenoid valve.
h) Disconnect the pipe union from the tee-piece in the
burner supply. Disconnect the igniter and the
flame-sensingconnections.
j) Ease the burner with the cross-pipe attached,
upward out of the front cradle. Slide it slightly to
the left and withdraw forward from the locating
pins on the rear bracket.
k) Replace in reverse order. Ensure two burner
locating holes engage on two rear bracket pegs.
On G7204 and G7208 models, burner should be
inclined at 20
o
from vertical, toward side panel. On
the G7211, burner should be upright in line with
combustion chamber side panel.
3.4 BURNER INJECTORS
a) Remove burners as detailed in Section 3.3.
b) Insert an appropriate spanner into burner air inlet
box and undo jet.
c) If injector orifice requires cleaning, use a wooden
splinter or similar non-metallic instrument. Do not
broach with a drill, this may increase effective
diameter of orifice.
d) Replace in reverse order. Ensure injector washers
are undamaged and replace as necessary.
3.5 IGNITION ELECTRODES
a) Remove appropriate burner as Section 3.3.
b) Disconnect conductor from electrode.
c) Remove screw which secures electrode to bracket.
Withdraw electrode.
d) Replace in reverse order. Ensure gap between
electrode cap and adjacent earth pin is between
3 and 4mm.
If gap is incorrect, the electrode should be replaced.
DO NOT attempt to bend electrode wire.
3.6 FLAME SENSING ELECTRODES
a) As Section 3.5 (a), (b) and (c).
b) Replace in reverse order. Ensure electrode tip lies
over burner ports and that the gap between port
and electrode is 4 to 5mm. If gap is incorrect, the
electrode should be replaced. Do not attempt to
bend electrode wire.
3.7 IGNITER GENERATOR
a) Remove RH side panel as Section 3.2.3.
b) Remove fixingsecuringig
niter to bracket.
Withdraw igniter through opening in vertical
support channel.
c) Pull off two HT leads and two electrical supply
terminals.
d) Replace in reverse order.
3.8 THERMOSTAT
3.8.1 Operating Thermostat
a) Drop down control panel as Section 3.2.2.
b) Disconnect electrical leads.
c) Pull off control knob and undo fixings which secure
thermostat to panel. Remove control, notingearth
connection.
d) Remove capillary tube from loom and cable clips.
e) Remove oven thermostat sensor shield. Remove
appropriate sensor by drawingthroug
h oven
aperture.
f) Replace in reverse order. Ensure earth wires are
reconnected but not pinched to thermostat via
fixingscrews.
3.8.2 Hold Thermostat
a) Remove RH side panel as Section 3.2.3.
b) Disconnect electrical leads.
c) Undo fixings securing thermostat to bracket.
d) Remove capillary phial from loom.
e) Remove oven shelves and rack.
f) Remove capillary phial shields and clips from
oven.Remove appropriate phial by drawing
through aperture to oven.
g) Replace in reverse order. Ensure earth wires are
reconnected but not pinched to thermostat via
fixingscrews.
