Viessmann Vitodens 100-W Installation And Service Instructions Manual page 27

Further details regarding the individual steps
r r
Commissioning, inspection, maintenance
(cont.)
3. Turn rotary selector "tr" clock-
wise for less than 2 s and then anti-
clockwise back to the control range
on the right.
The display shows "SERV" and the
boiler water temperature is shown.
4. Adjust the upper output:
Turn rotary selector "tr" to the
control range on the right.
The display shows 5 bars for upper
output.
5. Measure the CO
output.
The CO content must be between
2
7.4 and 10.5 %.
6. Adjust the lower output:
Turn rotary selector "tr" to the
control range on the left.
The display shows 1 bar for lower
output.
7. Test the CO content for lower out-
2
put.
The CO content must be between
2
7.4 and 10.5 %.
8. If the CO content is not within the
2
given range, check the flue gas/
ventilation air system for tightness.
Remedy any leaks.
content for upper
2
27