11
Static pressure
A
Fig. 4
1.
Close the gas shut-off valve.
2.
Undo the screw in test connector
A
, but do not
remove.
3.
Connect the pressure tester at test connector
A
.
4.
Open the gas shut-off valve.
5.
Check the static pressure (max. 60 mbar (6 kPa)).
6.
Record the actual value in the report (on
page 54).
Supply pressure
1.
Start the burner.
Note
For commissioning, see page 9. Switch the burner
to maximum heating output by activating the emis-
sions test switch at the control unit.
2.
Check the supply pressure (flow pressure); see
table on page 11.
Note
The supply pressure (flow pressure) must be
between 18 and 50 mbar (1.8 and 5 kPa) (nominal
20 mbar (2 kPa)). The gas pressure switch mini-
mum (GDW 1) is factory-set to 10 mbar (1 kPa).
Never alter this setting.
3.
Record the actual value in the report (on
page 54).
4.
Close the gas shut-off valve.
5.
Remove the pressure tester and close test connec-
tor
A
.
Supply pressure
(flow pressure)
Measure
< 15 mbar (1.5 kPa)
Do not make any adjustments. Notify the gas supply utility.
15 to 18 mbar
(1.5 to 1.8 kPa)
Please note: The boiler may only be operated temporarily with this setting (emergen-
cy mode).
Notify the gas supply utility.
18 to 50 mbar
(1.8 to 5 kPa)
Start the boiler.
> 50 mbar (5 kPa)
Install a separate gas pressure governor with zero off upstream of the boiler system,
and set the pressure to 20 mbar (2 kPa).
Notify the gas supply utility.
Commissioning, inspection, maintenance
Checking static pressure and supply pressure
5783 337 GB
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