Checking And Adjusting The Ignition And Ionisation Electrodes; Cleaning The Heat Exchanger And Fitting The Burner - Viessmann FB2A Installation And Service Instructions For Contractors

Further details regarding the individual steps
1. Remove electrodes B.
2. Undo three retaining clips C at ther-
mal insulation ring D and remove
thermal insulation ring D.
3. Undo four Torx screws and remove
burner gauze assembly E with its
gasket F.

Checking and adjusting the ignition and ionisation electrodes

6
+2
0
A
A Ignition electrodes
1. Check the electrodes for wear and
contamination.
2. Clean the electrodes with a small
brush (not with a wire brush) or sand
paper.

Cleaning the heat exchanger and fitting the burner

!
Please note
Scratches on parts that are in contact with flue gas can lead to corrosion.
Never use brushes to clean the heat exchanger.
Commissioning, inspection, maintenance
4. Insert and secure a new burner
gauze assembly E with a new gas-
ket F.
Torque: 3.5 Nm.
5. Refit thermal insulation ring D.
6. Refit electrodes B.
Torque: 2.5 Nm.
A
B Ionisation electrode
3. Check the electrode gaps. If the gaps
are not as specified or the electrodes
are damaged, replace and align the
electrodes together with new gas-
kets. Tighten the electrode fixing
screws with 2.5 Nm.
(cont.)
10
±1
B
37