Viessmann Vitoflame 100 Service Instructions Manual page 16

Initial start−up, inspection and maintenance
Further details regarding the individual steps
16
(cont.)
Fine adjusting stage 1
1. Bring service switch B into
position II (automatic mode) and
close the cover flap.
2. Change the burner to stage 1 by
pulling plug lÖ off.
3. Remove the cover from the
servomotor.
4. Change the air volume by turning
the adjusting screw at switch
cam ST 1 (see Fig. on page 9):
H Clockwise ³ more air,
H Anti−clockwise ³ less air.
Note
Adjust switch cam ST 1 (fine
adjustment) in small steps.
The adjustment of switch cam MV
must neither be below the
adjustment of switch cam ST 1 nor
above the adjustment of switch
cam ST 2.
After each adjustment of switch
cam ST 1, briefly operate the
burner at stage 2 and then back at
stage 1 (push plug lÖ into position
and then pull it again or
use the service plug), to balance
the switching hysteresis.
5. Fit the cover over the servomotor.
6. Check the adjustment via the
service plug.