32
221873B
14.1 Fan
Before starting refer to Section 11.
Disconnect the two electrical connectors at the fan by pulling the
boots not the wires, see diagram 14.1.
Remove the two flexible tubes from the fan, see diagram 14.1.
Note: When replacing the tubes from the air pressure switch
ensure the lower (red) tube from the fan connects to the upper
connection of the switch.
Remove the fan, secured with a screw at the front, ease the fan
outlet from the flue duct and retaining lip at the rear, see diagram
14.1.
Note: To fit the fan, locate it into the flue duct and rear retaining
lip, push fully up to ensure a good seal, then secure the fan with
the screw, see diagram 14.1.
The polarity of the two electrical connectors is not important.
14.2 Main Burner
Before starting refer to Section 11.
Remove as described in Servicing Section 12.
Remove the spark electrode assemblies from the burner secured
by three screws see diagram 12.1.
Fit spark electrode assemblies to new burner.
Taking care fit new burner.
14.3 Main Injector
Before starting refer to Section 11.
Remove as described in Servicing Section 12.
Unscrew the main injector.
When fitting the new main injector, fit the new copper sealing
washer, supplied, to ensure gas soundness, see diagram 14.2.
14.4 Ignition, Earth and Sensing Electrode
Before starting refer to Section 11 General Data.
Isolate the boiler from the electrical supply.
Remove the outer case front and the inner case front, refer to
Sections 11.4 and 11.5.
Remove the electrode lead and silicone sleeve, remove the
securing screw and electrode, see diagram 12.1.
14.5 Ignition, Earth and Sensing Lead
Before starting refer to Section 11.
Disconnect the silicone sleeve and lead at the electrode, see
diagram 12.1. (White to sensing electrode).
Important Note : If replacing one of the ignition leads it will
be necessary to disconnect both from their electrodes and
untwist them from one another and the earth lead. Make
sure when replacing the two ignition leads that they are
tightly twisted together again, and the earth lead is twisted
round the pair, see diagrams 10.2 and 12.1.
Disconnect leads from the two retaining clips at the side of case.
Remove the two screws securing the controls facia, see diagram
9.1.
14 Replacement of Parts
Diagram 14.2
6961
MANIFOLD
COPPER
SEALING
WASHER
INJECTOR
AIR PRESSURE
TUBES
SECURING
SCREW
Diagram 14.1
6985
ELECTRICAL
CONNECTION
(2)
RETAINING
LIP
FAN
RED
CLEAR
Hinge the control fascia open.
Remove the control board cover, see diagram 10.2.
Remove the lead on the control board and withdraw from
grommet, see diagram 14.8.
