10.2.10 Checking the burner
Warning
It is not necessary to clean the condensate collector. Never
remove the condensate collector, as it cannot be refitted
afterwards.
The heat exchanger has a treated surface and therefore does
not need to be cleaned. Cleaning with cleaning tools, chemicals,
compressed air or water is not permitted.
1. Switch off the boiler's electrical connection.
2. Close the gas tap under the boiler.
3. Close the main gas tap.
4. Unscrew the two screws located under the front housing by a quarter
turn and remove the front housing.
5. Press the clips on the sides of the instrument box inwards to unlock it,
then tilt the instrument box forwards.
6. Remove the air inlet flue on the venturi.
7. Unscrew the bottom nut on the gas valve unit.
8. Disconnect the connectors located under the gas valve unit and the
fan.
9. Release the 2 clips holding the fan/mixing elbow unit in place on the
heat exchanger.
10. Remove the fan together with the mixing elbow unit.
11. Lift the burner, along with the heat exchanger gasket.
12. Check the burner for contamination and that the burner deck is free
from signs of cracking and/or damage. If not, replace the burner.
13. Check the ionisation/ignition electrode.
14. Reassemble the unit in reverse order.
Caution
Remember to replace the plugs on the fan correctly.
Check that the gasket is correctly positioned between the mixing
elbow and the heat exchanger. (Completely flat in the
appropriate groove means it is leak proof).
15. Open the gas inlet valves and switch on the mains supply to the
boiler.
10.3
Specific maintenance work
Perform the specific maintenance work if this proves to be necessary
following the standard inspection and maintenance work. To conduct the
specific maintenance work:
Fig.95 Checking the burner
AD-0001242-03
12
13
10
9
9
14
11
6
7
X91
8
230V
8
10 Maintenance
7686707 - v.01 - 06092018 AMC 103
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