15
A
Fig. 4
From 120 kW
1.
Close the gas shut-off valve.
2.
Release screw
A
inside test connector "PE" on
the gas train, but do not remove it. Connect the
pressure gauge.
3.
Open the gas shut-off valve.
4.
Check the static pressure. Record the actual value
in the report on page 104.
Set value: Max. 30 mbar (3 kPa)
5.
Start the boiler.
Note
During commissioning, the appliance can enter a
fault state because of airlocks in the gas line. After
approx. 5 s, press reset button R to reset the
burner.
6.
Check the supply (flow) pressure.
Set value: 20/25 mbar (2/2.5 kPa)
Note
Use a suitable measuring device with a resolution
of at least 0.1 mbar (10 Pa) to check the supply
pressure.
7.
Record the actual value in the report on page 104.
Implement measures as indicated in the table
below.
8.
Shut down the boiler. Close the gas shut-off valve.
Remove the pressure gauge. Close test connec-
tor
A
with the screw.
9.
Open the gas shut-off valve. Start up the appli-
ance.
Danger
Gas escaping from the test connector leads
to a risk of explosion.
Check gas tightness at test connector
A
.
Supply pres-
sure (flow pres-
sure)
Measures
Below 17 mbar
(1.7 kPa)
Do not commission the appliance,
and notify the gas supply utility.
17 to 25 mbar
(1.7 to 2.5 kPa)
Start the boiler.
Above 25 mbar
(2.5 kPa)
Install a separate gas pressure
governor upstream of the system.
Set the pre-charge pressure to
20 mbar (2 kPa). Notify the gas
supply utility.
Setting the maximum heating output
A limit can be set on the maximum heating output for
heating mode
. The limit is set via the modulation
range. The upper limit of the max. adjustable heating
output is set by the coding card.
Commissioning, inspection, maintenance
Testing the static and supply pressure
(cont.)
5839829