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 out-
put. For this, activate the emissions
test switch at the control unit.
2. Check the supply pressure (flow
pressure), see table on page 13.
Note
The supply pressure (flow pres-
sure) should be between 20 and 50
mbar. The gas pressure switch is
factory set to 10 mbar. Never alter
this setting.
Supply pressure Measures
(flow pressure)
below 15 mbar Make no adjustments and contact the gas supply company
15 to 20 mbar Please note: The boiler may only be operated temporarily
with these settings (emergency mode).
Notify your gas supply company.
20 to 50 mbar Start the boiler
above 50 mbar Install a separate gas pressure valve with zero off upstream
in the boiler system, and regulate the pressure to 20 mbar.
Notify your gas supply company.
Initial start-up, inspection, maintenance
(cont.)
3. Record the actual value in the
report (on page 60).
4. Close the gas shut off valve.
5. Remove the pressure tester and
close test connector A.
13