Ignition Electrode Block; Ionization Electrode Block - Viessmann Vitocrossal 200 CM2 186 Service Instruction

Burner Service

Ignition Electrode Block

IMPORTANT
If adjustment to the electrode is necessary, be careful not
to damage the ceramic sleeve of the electrode.

Ionization Electrode Block

IMPORTANT
If adjustment to the electrode is necessary, be careful not
to damage the ceramic sleeve of the electrode.
WARNING
Leak test the reconnected gas line.
36
Vitocrossal 200 CM2 186 to 311 Service
1. Disconnect the ignition cables from the ignition electrodes
2. Remove the two M6 (5 mm hex) screws and washers
from the ignition electrode block and set aside.
3. Remove the ignition electrode block from the burner door.
4. Remove the ignition electrode block gasket from the
burner door.
5. Remove the four M12 (19 mm or c in. hex)
burner door bolts and washers and set aside.
Note: To access the burner door, disconnect gas line
and plugs 40/156, 53 and 40 from the burner
control bracket and plugs 90 and 41 from the
burner control.
6. Reinstall the new ignition electrode block and gasket.
7. Open the burner door and check dimensions between
electrodes as well as electrode and burner as shown.
Carefully adjust if necessary.
8. Reinstall in reverse order.
9. Torque the M12 (19 mm hex socket cap screws)
ignition electrode 13 lb.ft (18 Nm).
10.Torque the M6 (5 mm hex) burner door bolts to
35 lb.in (4 Nm).
WARNING
Leak test the reconnected gas line.
1. Disconnect the ionization cable from the electrode
terminal.
2. Remove the four M12 burner door bolts (19 mm or
c hex wrench) and washers and set aside.
Note: To access the burner door, disconnect gas line
and plugs 40/156, 53 and 40 from the burner
control bracket and plugs 90 and 41 from the
burner control.
3. Open the burner door.
4. Remove ionization electrode terminal nut (hex
7 mm). Remove serrated washer and O-ring.
5. Remove the inside portion of the ionization electrode.
6. Remove the two M6 screws (5 mm hex socket cap)
and washers from ionization electrode block and
discard it.
7. Remove the ionization electrode block and gasket
from burner door.
8. Reinstall in reverse order use only new parts supplied
in the kit.
9. Check the dimension between the electrode and
burner as shown. Carefully adjust if necessary.
10. Torque the M12 (19 mm hex) burner door bolts to
13 lb.ft (18 Nm).
11. Torque the M6 (5 mm hex socket cap screws)
ionization electrode 35 lb.in (4 Nm).
.