33
4. "Change?"
Select
"Yes"
.
A value flashes on the display (e.g.
"85"). In the delivered condition, this
value represents 100 % of rated out-
put.
5.
Select required value.
Constant temperature control unit:
1.
Press
OK
and
å
simultaneously
for approx. 4 s.
2.
Select
Ú
"
3
"
and confirm with
OK
.
A value flashes on the display (e.g.
"85") and "
A
" appears. In the deliv-
ered condition, this value represents
100 % of rated output.
3.
Select required value and confirm
with
OK
.
Checking the balanced flue system for tightness (annular gap
check)
A
Combustion air aperture (ventilation
air)
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
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
concentration in the combus-
tion 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
val-
ues are lower, then pressure test the flue
pipe with a static pressure of 200 Pa.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5457 552 GB
Service
