Viessmann B1HF - Checking and Adjusting the Ignition and Ionisation Electrodes; Checking the Back Draught Safety Devices

48
10
6.5
AA B
±0.5
4
+0.5
0
5
+3
0
+1
0
Fig. 32
A
Ignition electrodes
B
Ionisation electrode
1. Check the electrodes for wear and contamination.
2. Clean the electrodes with a small brush (not a wire
brush) or sandpaper.
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.
Checking the back draught safety devices
Only for multiple connections to a flue system or multi
boiler systems with a flue gas cascade.
Back draught safety device in the mixing shaft of
the burner
A
B
Fig. 33
Commissioning, inspection, maintenance
Checking and adjusting the ignition and ionisation electrodes
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