6.
Check the supply (flow) pressure.
Set values:
&
Natural gas 20 mbar
&
LPG 50 mbar
Note
Use suitable test equipment with a
resolution of at least 0.1 mbar to
measure the supply pressure.
7.
Record the actual value in the ser-
vice report.
Take the action shown in the follow-
ing table.
8.
Shut down the boiler, close the gas
shut-off valve, remove the pressure
gauge and close test nipple
A
with the screw.
9.
Danger
Gas escaping from the test
nipple leads to a risk of
explosions.
Check for tightness.
Open the gas shut-off valve, start
the boiler and check for tightness
at test nipple
A
.
Supply (flow)
pressure for nat-
ural gas
Supply (flow)
pressure for
LPG
Measures
below 17.4 mbar
below 42.5 mbar
Do not start the boiler. Notify your
mains gas or LPG supplier.
17.4 to 25 mbar
42.5 to 57.5 mbar
Start the boiler.
in excess of
25 mbar
in excess of
57.5 mbar
Install a separate gas pressure gover-
nor upstream of the system and regu-
late the inlet pressure to 20 mbar for
natural gas or 50 mbar for LPG. Notify
your mains gas or LPG supplier.
Setting the maximum output
Note
You can limit the maximum output for
heating operation
. The limit is set via the
modulation range. The max. adjustable heating output is limited upwards by the
boiler coding card.
1.
Start the boiler.
Further details regarding the individual steps
(cont.)
15
Commissioning, inspection, maintenance
5692
673
GB
Summary of Contents for VITODENS 300-W
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