Checking And Adjusting The Ignition And Ionisation Electrodes; Checking The Back Draught Safety Devices - Viessmann B0KA Installation And Service Instructions Manual

Checking and adjusting the ignition and ionisation electrodes

+1
6.5
0
A
Fig. 30
Ignition electrodes
A
Ionisation electrode
B
1. Check the electrodes for wear and contamination.
2. Clean the electrodes with a small brush (not a wire
brush) or sandpaper.

Checking the back draught safety devices

Only for multiple connection to a flue system or multi
boiler systems with a flue gas cascade
Back draught safety device in the mixing shaft of
the burner
B
A
Fig. 31
1. Undo 2 screws and remove fan
2. Remove back draught safety device
+3
5
0
10
A B
.
A
B .
Commissioning, inspection, maintenance
±0.5
3. Check the electrode gaps. If the gaps are not as
specified or the electrodes are damaged, replace
the electrodes and gaskets and adjust them as
required.
Tighten screws as tightly as necessary and ensure
that the components are undamaged and are func-
tioning correctly throughout service life.
Observe torque settings if a torque wrench is avail-
able.
Tighten the electrode fixing screws to a torque of
4.5 Nm.
3. Check the damper and gasket for dirt and damage.
Replace if necessary.
4. Refit back draught safety device
Note
Observe correct installation position.
5. Refit fan and secure with 2 screws.
A
Tighten screws as tightly as necessary and ensure
that the components are undamaged and are func-
tioning correctly throughout service life.
Observe torque settings if a torque wrench is avail-
able.
Torque: 4.0 Nm
.
B
43