Viessmann VITOCROSSAL 200 Service Instructions Manual page 13

Further details regarding the individual steps
Supply pressure
1. Start the burner.
Note
For commissioning, see page 7.
Switch the burner to maximum heat-
ing output. For this, activate the emis-
sions test switch at the control unit.
2. Check the supply pressure (flow
pressure), see table on page 13.
Note
The supply pressure (flow pressure)
should be between 20 and 50 mbar.
The gas pressure switch is factory set
to 10 mbar. Never alter this setting.
Supply pressure
(flow pressure)
Below 15 mbar
15 to 20 mbar
20 to 50 mbar
Above 50 mbar
Measure
Make no adjustments and notify the gas supply utility.
Please note The boiler may only be operated temporarily with
these settings (emergency mode).
Notify your gas supply utility.
Start the boiler
Install a separate gas pressure governor with zero off upstream
in the boiler system, and regulate the pressure to 20 mbar.
Notify your gas supply utility.
Commissioning, inspection, maintenance
3. Record the actual value in the report
(on page 61).
4. Close the gas shut-off valve.
5. Remove the pressure tester and
close test nipple A.
(cont.)
13