41
9.
Danger
Gas escaping from the test
nipple leads to a risk of explo-
sion.
Check for gas tightness.
Open the gas shut-off valve, start the
boiler and check for tightness at test
nipple
A
.
Supply (flow) pres-
sure for natural
gas
Supply (flow)
pressure for LPG
Action
below 15 mbar
below 42.5 mbar
Do not start the boiler. Notify your gas
supply utility or LPG supplier.
15 to 25 mbar
42.5 to 57.5 mbar
Start the boiler.
above 25 mbar
above 57.5 mbar
Install a separate gas pressure governor
upstream of the system and regulate the
pre-charge pressure to 20 mbar for natu-
ral gas or 50 mbar for LPG. Notify your
gas supply utility or LPG supplier.
Maximum output setting
The maximum output for
heating oper-
ation
can be limited. The limit is set via
the modulation range. The max. adjust-
able output is limited upwards by the
boiler coding card.
Weather-compensated control unit:
1.
Press
OK
and
å
simultaneously
for approx. 4 s.
2. "Service functions"
3. "Max. output"
4. "Change?"
Select
"Yes"
.
A value appears on the display (e.g.
"85"). In the delivered condition, this
value represents 100 % of rated heat-
ing output.
5.
Set the required value.
Constant temperature control unit:
1.
Press
OK
and
å
simultaneously
for approx. 4 s.
Commissioning, inspection, maintenance
Further details regarding the individual steps
(cont.)
5623 520 GB
Service
