Viessmann VITODENS 300 WB3A, Service Instructions Manual

Page: 32 / 148

6. Set the upper rated output.
Constant temperature control units:
& With
a
/
b
in the display, select
2.
Weather-compensated control
units:
& With
a
/
b
in the display, select
"Full load".
7. Check the CO
2
content. Should the
actual value deviate by more than
1 % from the above range, imple-
ment steps from page 15 (possibly
replace the burner).
8. After testing, press
d
.
9. Enter actual values into the service
report.
Setting the max. output
Note
The max. output can be limited for heating operation . You can limit the output
via the modulation range.
1. Start up boiler.
2. Press both
K
and
F
simulta-
neously until 100 flashes on the
display, (equals 100 % of the rated
output) and
A
appears. On
weather-compensated control
units, the display additionally
shows "Max. output".
3. With
a
/
b
select the required
value in % of rated output as max.
output.
4. Confirm the set value with
d
.
5. Record the settings for max. output
on the additional type plate
included with the technical docu-
mentation. Affix the type plate next
to the original type plate on top of
the boiler.
Note
The output can also be limited for
DHW loading. For this, change coding
address 6F in code 2.
Further details regarding the individual steps
(cont.)
16
Initial start-up, inspection, maintenance
56
92
550
GB