Auxiliary Burner Removal - Viessmann Vitotwin 300-W Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance
Further details regarding the individual steps
For balanced flue systems tested
together with the wall mounted gas fired
boiler, the requirement for a tightness
test during commissioning by the flue
gas inspector is not applicable.
We recommend that your heating engi-
neer carries out a simple leak/tightness
test during the commissioning of your
system. For this, it would be sufficient to
check the CO or O
2
combustion air at the annular gap of the
balanced flue pipe.

Auxiliary burner removal

E
B
C
70
concentration in the
2
The flue pipe is deemed to be gas-tight
if the CO concentration in the combus-
2
tion air is no higher than 0.2 % or the
O concentration is at least 20.6 %.
2
If actual CO values are higher or O
2
ues are lower, then pressure test the flue
pipe with a static pressure of 200 Pa.
D A
(cont.)
2
val-