Viessmann VITODENS 100-W Installation And Service Instructions Manual page 52

Commissioning, inspection, maintenance
Further details regarding the individual steps
52
(cont.)
06. Set the lower heating output:
Turn rotary selector "tr" into the
l.h. section of the control range until
the display shows 1 bar for the lower
heating output.
07. Check the CO
heating output.
The CO content must be between
2
0.3 and 0.9 % below the value of the
upper heating output.
08. ■ If the CO content is within the
2
given range, continue with point
10.
■ If the CO content lies outside the
2
given range, check the flue gas/
ventilation air system for tight-
ness; remedy any leaks.
Replace gas train if required.
09. Re-check the CO
upper and lower heating output.
10. Shut down the boiler, remove the
flue gas analyser and close flue gas
test port A.
11. Turn both rotary selectors "tw" and
"tr" to their respective original
positions.
content for the lower
2
content for the
2