10.3.8 Checking the burner and cleaning the heat exchanger
1. Disconnect the plug of the ionisation/ignition electrode from the
ignition transformer.
Caution
The ignition cable is fixed to the ionisation/ignition electrode and
therefore may not be removed.
2. Loosen the 2 screws of the ionisation/ignition electrode.
3. Remove the ionisation/ignition electrode from the heat exchanger.
4. Undo the 3 bolts from the adapter on the non-return valve holder (15
Nm torque).
5. Undo the 3 nuts from the adapter on the heat exchanger (15 Nm
torque).
6. Carefully remove the adapter with burner from the heat exchanger.
7. Remove the 3 bolts from the burner on the adapter and dismantle the
burner.
8. Undo the nuts on the inspection ports (7.5 Nm torque).
Remove the inspection ports to reach the heat exchanger.
9. Use a vacuum cleaner to clean the top part of the heat exchanger
(furnace).
10. Check (e.g. using a mirror) whether any visible contamination has
been left behind. If it has, remove it with the vacuum cleaner.
11. Clean the lower section of the heat exchanger with the special
cleaning blade (accessory).
12. Burner maintenance is almost never required; it is self-cleaning:
12.1. If necessary, carefully clean the cylinder-shaped burner with
compressed air.
12.2. Check that the burner cover of the dismantled burner is free
from cracks and/or damage. If not, replace the burner.
13. Reassemble the unit in the reverse order.
14. Open the gas supply and insert the plug in the socket again.
Caution
Use the specified torques when fitting nuts and bolts.
Make sure the gaskets are in place when fitting nuts and bolts.
Fig.84
Checking the burner
AD-0000128-02
9
11
7 3x
6
8
12
10
1
2
3
5 3x
4 3x
10 Maintenance
7625116 - v.06 - 17102018
63
