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Diagram 13.4
Diagram 13.5
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13 Servicing
13.1 Servicing
NOTE: If the Combustion CO2, CO/CO2 ratio & Gas rate
checks did not require adjustment then it will not be necessary
to complete a full service.
All routine servicing requirements can be achieved by the
removal of the front panel, see diagram 13.2. Position the
control box into the service position, see diagram 13.3.
Before commencing with a service or replacement of parts.
The boiler should be isolated from the electrical and gas
supplies.
13.4 Spark Electrode
NOTE: If the functional checks did not indicate poor
combustion then it is not necessary to service this
component.
Ease the securing clips away from the sump to release the
retaining catch then push the ue hood up to disengage from
the sump, see diagram 13.4.
To remove, swivel ue hood 90
o
and pull down and out, see
diagram 13.4.
Check seal for wear or damage and replace if necessary.
IMPORTANT: Do not allow xings, nuts, screws, etc. to fall
into the open ue hood sump, use a temporary cover whilst
removing any parts.
Disconnect the spark electrode plug and earth lead. Remove
the two securing screws and withdraw the spark electrode
carefully from the combustion chamber, see diagram 13.5.
Inspect the tips for damage.
Clean away any debris and check the spark gap is 4mm.
Check the electrode gasket for signs of damage and replace
if necessary.
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