B
Ignition electrode
Replacing the ignition electrode is necessary when the pins are worn.
If the inspection hole is damaged, the entire ignition electrode has to be replaced.
It is replaced as follows:
- Take away the plug connections on the ignition electrode;
- Push the clip on top of the electrode upwards and take away the electrode;
- Remove and replace the gasket;
Reassembly takes place in reverse order.
Always replace the gaskets of the removed parts during maintenance.
Put the boiler back into operation and carry out a ue gas analysis (see page 55).
Always put back the cover after (maintenance) work and secure it with screws A and B.
Note: During routine servicing, and after any maintenance or change of part of the combustion
circuit, the following must be checked:
Checking the CO
2
- Check the CO
2
readings at full load and low load as described in section 13.1
Checking CO readings and Combustion Performance (CO/CO
2
ratio)
- Check CO readings and Combustion Performance as described in Section 13.2
The combustion reading (CO/CO
2
ratio) must be less than 0.004. If the combustion reading (CO/CO
2
ratio)
is greater than this, and the integrity of the complete ue system and combustion circuit seals has been
veried, and the inlet gas pressure and gas rate are satisfactory either:
- Perform the ‘Full Service’.
- Perform ‘Setting the Gas Valve’.
Please contact your installer or ATAG Heating Technology Ltd. for further details. Contact details can be
found on the back page of this manual.
After servicing, complete the relevant Service Interval Record section of the Benchmark Checklist
located on the inside back page of the document.
Figure 16.g
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