HAMWORTHY HEATING LTD
51
MILBORNE
500001130/J
10.6
Cleaning the ignition electrode
The ignition electrode is used to create a high-
voltage spark and also to sense the flame. This
component requires annual maintenance to remove
any layer of oxide which may have built-up on the
wire. Check whether the electrode wire has any
earth current leakage and make sure that the cap is
not oxidized.
In case of oxidation, replace the spark plug and its
cap with new ones - see figure 10.6.1
Figure 10.6.1
Figure 10.6.2
Loosen the fixing screws of the ignition electrode
bracket - see figure 10.6.1.
Remove the electrode from the heat exchanger -
see figure 10.6.2.
Check the condition of the electrode and remove
any oxide present with abrasive paper, or replace
the electrode.
If the electrode is replaced, a new gasket
MUST
be
fitted.
Accurately check the distance between the
electrode wires - see figure 10.6.3. & 10.6.4.
NOTE: Two types of electrode have been used
and both are interchangeable.
The distance should be 3 - 5 mm;
10.7
Reassembly
- having carried out the detailed
servicing procedure, re-assemble all components,
having fitted replacement gaskets where required.
Check all gas connections are tightened securely
before opening the gas service cock. Re-connect
Distance between
wires 3 - 5mm
Figure 10.6.3
Gasket
electrical connections. Switch on the electrical supply to
the module - see figure 7.4.3, and re-light the boiler
following the procedure detailed in section 7.4.
Take combustion readings and compare with those
previously taken—see section 7.4 Ensure that no gas
leaks are evident from gas connections. Check
temperature settings and adjust if necessary
10.8
Flue sample point sealing plug
The plug is provided to allow set-up and adjustment,
if necessary, of combustion during maintenance and
commissioning of the boiler
THE PLUG MUST BE REPLACED FINGER TIGHT
ONLY!
Figure 10.6.4
Distance between
wires 3 - 5mm
Figure 10.8
