Tightness Test, Balanced Flue System (Annular Gap Check) - Viessmann Vitodens 200-W Installation And Service Instructions For Contractors

Commissioning, inspection, maintenance
Setting max. heating output
Weather-compensated control unit
Service menu
1. Press OK and simultaneously for approx. 4 s.
å
2. "Service functions"
3. "Max. output"
4. "Change?" Select "Yes".
A value is shown on the display (e.g. "85"). In the
delivered condition, this value represents 100 % of
rated heating output.
5. Set the required value.

Tightness test, balanced flue system (annular gap check)

A
Fig. 22
Combustion air aperture
A
For balanced flue systems tested together with the wall
mounted gas fired boiler, the requirement for a tight-
ness test during commissioning by the flue gas inspec-
tor is not applicable.
We recommend that your heating engineer 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 concentration in the combustion air at
2 2
the annular gap of the balanced flue pipe.
28
(cont.)
Constant temperature control unit
Service menu
1. Press OK and
å
2. Select " 3 " with
Ú
A value flashes on the display (e.g. "85") and "
appears. In the delivered condition, this value repre-
sents 100 % of rated heating output.
3. Select required value and confirm with OK.
The flue pipe is deemed to be gas-tight if the CO
centration in the combustion 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
then pressure test the flue pipe with a static pressure
of 200 Pa.
simultaneously for approx. 4 s.
and confirm with OK.
.
%
values are lower,
2
"
A
con-
2
%