Viessmann MatriX radiant burner Service Instructions Manual page 9

Further details regarding the individual steps
A
Supply pressure
(flow pressure)
below 15 mbar
15 to 20 mbar
20 to 50 mbar
above 50 mbar
Remedy
Do not change settings
Warning: The boiler may only be temporarily operated with
these settings (emergency mode).
Notify your gas supply company.
Boiler start−up
Install a separate gas governor with zero off upstream of the
boiler, and regulate the pressure to 20 mbar.
Notify your gas supply company.
Initial start−up, inspection and maintenance
Supply pressure
7. Start up the burner.
Please note:
Initial start−up, see page 5.
Switch the burner to max. output;
to do this, activate the emissions
test switch on the control unit.
8. Check the supply pressure (flow
pressure), see the table below.
Please note:
The supply pressure (flow
pressure) should be between
20 and 50 mbar.
The gas governor is factory−set to
12 mbar.
Do not change this setting.
9. Record the actual values in the
service report (from page 42).
10. Close the gas shut−off valve.
11. Remove the U−shaped pressure
gauge and close test nipple A.
contact gas supply company
(cont.)
9