Vaillant ecoTEC plus VUI Series Installation And Maintenance Instructions Manual page 59

5. Install the new PCB in reverse order.
6. Start up the product.
13.7.17 Replacing the ignition electrode
Danger!
Risk of death from hot flue gases!
Seals, screws and insulation on the control
electrode and combustion chamber must not
be damaged.
▶
Avoid damaging the burner insulating
mat on the back panel of the combustion
chamber cover.
▶
Replace the burner insulating mat as soon
as it shows signs of damage.
▶
Replace the seal and screws each time
you replace the control electrode.
1
5
4
1. Remove the earth cable (4).
2. Remove the plug (1) for the ignition electrode's cable.
3. Unscrew both screws.
4. Thread the ignition electrode (5) carefully out of the
burner flange (3). Ensure that you do not damage the
burner insulating mat on the rear of the combustion
chamber cover.
5. Remove the sealing residue from the burner flange.
Caution.
Risk of material damage caused by touch-
ing and cleaning.
The electrode may emit incorrect signals due
to changes in the surface.
▶
Only touch an electrode at the ceramic
section.
▶
Never clean an electrode.
6. Insert the new ignition electrode with a new seal (2).
7. Use two new screws to screw the ignition electrode in
tightly. Tightening torque, see appendix.
8. Reconnect the plug for the ignition electrode's ignition
line.
0020308121_04 Installation and maintenance instructions
2
3
9. Reconnect the plug on the earth cable.
13.7.18 Replacing the control electrode
Danger!
Risk of death from hot flue gases!
Seals, screws and insulation on the control
electrode and combustion chamber must not
be damaged.
▶
Avoid damaging the burner insulating
mat on the back panel of the combustion
chamber cover.
▶
Replace the burner insulating mat as soon
as it shows signs of damage.
▶
Replace the seal and screws each time
you replace the control electrode.
1
2
4
1. Remove the plug (1) for the control electrode's cable.
2. Unscrew both screws.
3. Thread the control electrode (4) carefully out of the
burner flange (3). Ensure that you do not damage the
burner insulating mat on the rear of the combustion
chamber cover.
4. Remove the sealing residue from the burner flange.
Caution.
Risk of material damage caused by touch-
ing and cleaning.
The electrode may emit incorrect signals due
to changes in the surface.
▶
Only touch an electrode at the ceramic
section.
▶
Never clean an electrode.
5. Insert the new control electrode with a new seal (2).
6. Use two new screws to screw the control electrode in
tightly. Tightening torque, see appendix.
7. Reconnect the plug for the control electrode's ignition
line.
8. Install the front casing. (→ Section 7.11)
3
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