Viessmann VITOGAS 100-F Service Instructions Manual page 9

Further details regarding the individual steps
10. Remove the pressure gauge and
seal test nipple A with screw.
Supply pressure (flow pressure):
Natural gas
Below 8 mbar
8 to 25 mbar
Above 25 mbar
LPG
Below 27.7 mbar
27.7 to 57.5 mbar
Above 57.5 mbar
Commissioning, inspection, maintenance
11. Open the gas shut-off valve and
check test nipple A for gas tight-
ness.
Danger
Gas escaping from the test
nipple leads to a risk of
explosion.
Check the test nipple for gas
tightness.
Action
■ Do not commission the boiler
■ Notify your gas supply utility or your
LPG supplier
Commission the boiler
■ Install a separate gas pressure gover-
nor upstream of the system
■ Setting the pre-charge pressure:
20 mbar for natural gas
30 mbar for LPG
■ Notify your gas supply utility or your
LPG supplier
(cont.)
9