Viessmann VITODENS 200-W WB2B Series Start-Up/Service Instructions page 19

Steps
(continued)
S
ervice
B
Fig. 11 Checking burner gasket and cylinder assembly
S
ervice
+2
6
0
A
16. Check burner gasket and cylinder assembly
Check the burner gasket A and cylinder burner assembly E for damage and
replace if necessary.
F E D
17. Check and adjust ignition and ionization electrodes
A
A C
3x
±
10
1
B
Initial Start-up and Service
1. Remove electrode block and
ionization electrode B.
2. Undo the three retaining clips C at
the refractory ring D and remove
refractory ring D.
3. Loosen the four Torx screws and
remove cylinder burner assembly E
and assembly gasket F.
4. Fit and secure new cylinder burner
assembly E and new assembly
gasket F. Tighten to a torque of
2.6 lb.ft. / 3.5 Nm using a calibrated
torque wrench.
5. Reinstall refractory ring D.
6. Reinstall electrode block and
ionization electrode B. Tighten to a
torque of 2.6 lb.ft. / 3.5 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 1.85 lb.ft. /
2.5 Nm using a calibrated torque
wrench.
19