Viessmann VITODENS 300 WB3A, Инструкция по эксплуатации

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Checking the balanced flue system for soundness (annular
gap check)
A
Combustion air aperture
For balanced flue systems tested
together with the gas fired wall
mounted boiler, some Federal States
(e.g. Northrhein-Westphalia) waive
the requirement for a soundness test
(overpressure test) during commis-
sioning by the flue gas inspector.
For such cases we recommend that
your heating contractor carries out a
simple soundness test during the
initial start-up of your system. For
this, it would be sufficient to check the
CO
2
concentration in the combustion
air at the annular gap in the balanced
flue pipe.
The flue pipe is deemed to be sound,
if the CO
2
concentration of the com-
bustion 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, carry out a pressure
test on the flue pipe at a static pres-
sure of 200 Pa.
Further details regarding the individual steps
(cont.)
17
Initial start-up, inspection, maintenance
56
92
550
GB