Viessmann Vitodens 050-W Installation And Service Instructions Manual page 27

Further details regarding the individual steps
A
Commissioning, inspection, maintenance
(cont.)
1. Connect a flue gas analyser at flue
gas port A on the boiler flue con-
nection.
2. Start the boiler and check for tight-
ness.
Danger
Escaping gas leads to a risk of
explosion.
Check all gas equipment for
tightness.
3. The burner output can be set man-
ually in order to check the CO
tent.
1. PressÀ.
2. / until "SERV" is displayed.
3. ¿ as confirmation.
"OFF" appears on the display.
4. Set the burner output with / :
Display indication:
_ : 20 %
_ _ : 40 %
_ _ _ : 60 %
_ _ _ _ : 80 %
_ _ _ _ _ : 100 %
5. Confirm your settings with ¿.
This function terminates automati-
cally after 30 min or set the burner
output to "OFF" with / .
4. Set the higher heating output and
check the CO content.
2
The CO content must be between
2
7.0 and 10.5 %.
con-
2
27