28
Weather-compensated control unit
Constant temperature control unit
Service menu
1. Press
OK
and
å
simultaneously for approx. 4 s.
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.
Service menu
1. Press
OK
and
å
simultaneously for approx. 4 s.
2. Select
"
3
"
with
Ú
and confirm with
OK
.
A value flashes on the display (e.g.
"85"
) and
"
A
"
appears. In the delivered condition, this value repre-
sents 100 % of rated heating output.
3. Select required value and confirm with
OK
.
Tightness test, balanced flue system (annular gap check)
A
Fig. 22
A
Combustion air aperture
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
2
or O
2
concentration in the combustion air at
the annular gap of the balanced flue pipe.
The flue pipe is deemed to be gas-tight if the CO
2
con-
centration in the combustion 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 with a static pressure
of 200 Pa.
Commissioning, inspection, maintenance
Setting max. heating output
(cont.)
5772 980 GB
