Viessmann VITODENS 050-W Installation And Service Instructions Manual page 39

Further details regarding the individual steps
Commissioning, inspection, maintenance
(cont.)
3. To check the CO
burner output can be adjusted man-
ually.
1. Press MODE.
2. / repeatedly until "SERV" is
displayed.
3. OK to confirm.
"OFF" appears on the display.
4. Use / to adjust the burner out-
put:
Shown on
display
_ 20
_ _ 40
_ _ _ 60
_ _ _ _ 80
_ _ _ _ _ 00
5. Confirm your setting with OK.
Note
This function terminates automati-
cally after 30 min; alternatively use
/ to set the burner output to
"OFF" after checking.
4. Set the upper heating output and
check the CO
2
The CO content must be within the
2
following range for the respective
gas type. See table.
Gas type
E or H (G20)
P (G31)
content the
2
Burner out-
put
20 %
40 %
60 %
80 %
100 %
content.
CO content
2
in %
7.5 – 10.5
10.0 – 12.0
39