Checking The Flue Gas Non-Return Device; Checking And Adjusting The Ignition And Ionisation Electrodes - Viessmann VITODENS 200-W Installation And Service Instructions Manual

Commissioning, inspection, maintenance

Checking the flue gas non-return device

Fig.27
1. Undo 3 screws and remove fan
2. Remove flue gas non-return device
3. Check the damper and gasket for dirt and damage.
Replace if required.

Checking and adjusting the ignition and ionisation electrodes

6
+2
0
A
Fig.28
Ignition electrodes
A
Ionisation electrode
B
1. Check the electrodes for wear and contamination.
2. Clean the electrodes with a small brush (not with a
wire brush) or sandpaper.
!
Please note
Wire mesh:
Do not damage.
36
B
A
A .
.
B
5 +3
0
A
4. Refit flue gas non-return device
5. Refit fan and secure with 3 screws.
A
Torque: 3.0 Nm
14
±1
B
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 gaskets.
Tighten the screws of the electrodes. Torque:
2.0 Nm
B .