Viessmann WB1A007 Installation And Service Instructions Manual page 55

Steps
(continued)
S
Maintenance
ervice
S
Maintenance
ervice
Side view
Top view
Initial Start-up, Inspection and Maintenance
13. Check burner gasket and cylinder assembly for damage
Check the burner gasket
replace if necessay. Replace the burner cylinder assembly if damaged.
14. Check and adjust ignition and ionization electrodes
1. Check ignition and ionization
electrode for wear and
contamination.
2. Clean electrodes with a small brush
or emory paper.
3. Check clearances. If clearances are
not satisfactory or the electrodes are
damaged, replace electrode block
and gasket and align. Tighten
fastening screws for the electrodes
to a torque of 1.8 lb.ft. / 2.5 Nm
using a calibrated torque wrench.
Legend
Ignition and ionization electrodes
Grounding rod
and burner cylinder assembly
1. Remove electrode block
2. Loosen the three Torx screws and
remove the thermal insulation ring
.
3. Loosen the four Torx screws and
remove burner cylinder assembly
and assembly gasket
4. Fit and secure new burner cylinder
assembly
gasket .
Tighten to a torque of 2.5 lb.ft. /
3.5 Nm using a calibrated torque
wrench.
5. Reinstall thermal insulation ring
6. Reinstall electrode block
Tighten to a torque of 1.8 lb.ft. /
2.5 Nm using a calibrated torque
wrench.
for damage and
.
.
and new assembly
.
.
55