Viessmann Vitodens 200-W WB2B 80 Start-Up/Service Instructions page 19

Steps
(continued)
S
ervice
A
Fig. 10 Checking burner gasket and cylinder assembly
S
ervice
+2
6
0
A
Fig. 11
16. Check burner refractory and cylinder assembly
Check the burner refractory ring C and cylinder burner assembly E for
damage and replace if necessary.
F E D4x C
17. Check and adjust ignition and ionization electrodes
A
B3x
14 ±
1
B
Initial Start-up and Service
1. Remove electrode block and
ionization electrode A.
2. Undo the three retaining clips B at
the refractory ring C and remove
refractory ring C.
3. Loosen the four Torx screws D 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
40 lb.in / 4.5 Nm using a calibrated
torque wrench.
5. Reinstall refractory ring C.
6. Reinstall electrode block and
ionization electrode A. Tighten to
a torque of 40 lb.in / 4.5 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 17.7 lb.in /
2 Nm using a calibrated torque
wrench.
19