Setting The Maximum Output; Checking The Balanced Flue System For Soundness (Annular Gap Check) - Viessmann VITODENS 343-F WS4A Installation And Service Instructions Manual

Further details regarding the individual steps

Setting the maximum output

Note
You can limit the maximum output for heating operation. The limit is set via the
modulation range.
1. Start the compact boiler.
2. Press K and F simultaneously
until "100" flashes in the display (=
100 % of rated output) and "Max.
output" and "A" appear.
3. With a/b select the required
value in % of rated output as maxi-
mum output.
Checking the balanced flue system for soundness (annular
gap check)
A Combustion air port
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.
Commissioning, inspection, maintenance
(cont.)
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 additional type
plate next to the original type plate
on top of the compact boiler.
We recommend that your heating
engineer carries out a simple sound-
ness test during the commissioning of
your system. For this, it would be suf-
ficient to check the CO
tration in the combustion air at the
annular gap of the balanced flue pipe.
or O concen-
2 2
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