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 maxi-
mum output.
4.
Confirm the set value with
d
.
5.
Record the settings for maximum
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 heating. For this, change coding
address "6F" in code 2.
Checking the balanced flue system for soundness (annular
gap check)
A
Combustion air aperture
For balanced flue systems tested
together with the wall mounted gas
fired boiler, some authorities waive
the requirement for a soundness test
(overpressure test) during commis-
sioning by the flue gas inspector.
We recommend that your heating
engineer carries out a simple leak test
during the commissioning of your sys-
tem. For this it would be sufficient to
check the CO
2
concentration in the
combustion air at the annular gap of
the balanced flue pipe.
The flue pipe is deemed to be sound if
the CO
2
concentration in the combus-
tion air is no higher than 0.2% or the
O
2
concentration is at least 20.6%.
If actual CO
2
values are higher or O
2
values are lower, then pressure test
the flue pipe at a static pressure of
200 Pa.
Further details regarding the individual steps
(cont.)
17
Initial start-up, inspection, maintenance
5692
569
GB
Summary of Contents for Vitodens 300
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