Assembly; Check And Adjust Ignition And Ionization Electrodes - Viessmann VITODENS 222-F Service Instructions Manual

Vitodens 222-F B2TA 19 and 35 Service
Checking the Burner Flue Gas Flapper
Checking the Burner Gasket and Burner Gauze Assembly

Check and Adjust Ignition and Ionization Electrodes

Legend
A Ignition electrodes
B Ionization electrode
1. Undo two screws and remove fan A.
2. Remove the burner flue gas flapper B.
3. Check the flapper and gasket for dirt and damage.
Replace as necessary.
4. Refit the burner flue gas flapper B.
5. Refit fan A and secure with three screws.
Torque: 2.2 lb.ft. (3.0 Nm).
Check burner door gasket A and cylinder burner
assembly E for damage; replace if required.
1. Remove electrode block and ionization electrode B.
2. Undo three retaining clips C on thermal refractory
ring D and then remove thermal refractory ring D.
3. Undo four Torx screws and remove burner gauze
assembly E with gasket F.
4. Insert and secure a new burner gauze assembly E
with a new gasket F. Tighten to a torque of
31 lb.in. (3.5 Nm) using a calibrated torque wrench.
5. Reinstall refractory ring A and secure with retaining
clip C.
6. Reinstall electrode block and ionization electrode B.
Tighten to a torque of 40 lb.in. (4.5 Nm) using a
calibrated torque wrench.
1. Check the ignition electrodes A and ionization
electrode B for wear and contamination.
2. Clean electrodes with small brush (not a wire brush)
or emery paper.
3. Check electrode gaps. If the gaps are not as specified,
or the electrodes are damaged, replace and align the
electrodes with new gaskets. Tighten the electrode
fixing screws to a torque of 40 lb.in. (4.5 Nm)
using a calibrated torque wrench.
Service
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