Checking And Adjusting The Ignition And Ionisation Electrodes; Cleaning The Combustion Chamber And Heating Surfaces - Viessmann VITOCROSSAL Service Instructions Manual

Commissioning, inspection, maintenance
Checking the burner gauze assembly and thermal...
2. Undo 4 nuts. Remove burner gauze assembly and
insulating parts.
!
Please note
Damage to the burner gauze assembly will
impair the burner function.
Do not damage the mesh.
Never touch the mesh of the burner gauze
assembly. Place the burner horizontally onto
a suitable surface.
Torque in Nm
kW
Electrodes
Ignition transformer
Fan
Gas train
Burner gauze assembly

Checking and adjusting the ignition and ionisation electrodes

16
±1
A
Fig. 14
Ionisation electrode
A
Ignition electrodes
B
1. Check the electrodes for wear and contamination.
2. Clean the electrodes with a small brush (not a wire
brush) or cleaning fleece.
!
Please note
Damage to the burner gauze assembly will
impair the burner function.
Do not damage the mesh.

Cleaning the combustion chamber and heating surfaces

!
Please note
Contact with unalloyed iron and scratches on
parts in contact with flue gases can lead to cor-
rosion.
Only use plastic brushes, no wire brushes or
sharp objects.
24
3. Replace any damaged components. Use new gas-
4. Reassemble in reverse order. Observe torque val-
Up to 80
B
3. Check the electrode gaps. If the gaps are not as
(cont.)
kets.
Note
Observe the positioning aid on the thermal insula-
tion block.
ues.
120/160
4
1.5 1.5
5
3
5
specified or the electrodes are damaged, replace
and align the electrodes together with new gas-
kets. Tighten the electrode fixing screws with a tor-
que of 4 Nm.
Danger
Loose residues and residual cleaning agents
can lead to injury.
Wear goggles, protective gloves and protective
clothing.
From 200
4 4
1.5
3 6
3 3
5 5
10
-2
B