Viessmann Vitogas 100 Service Instructions Manual page 8

Initial start−up, inspection and maintenance
Further details regarding the individual steps
Supply pressure (flow pressure)
for
natural gas
below
17.4 mbar
17.4 to 25 mbar 42.5 to
above 25 mbar
8
LPG
below
42.5 mbar
57.5 mbar
above
57.5 mbar
6. Check the supply (flow) pressure;
it should be
H 17.4 to 25 mbar for natural gas,
H 42.5 to 57.5 mbar for LPG.
Record the actual value in the
service report.
Take the action shown in the table.
Remedy
Make no adjustments and notify your
mains gas or LPG supplier.
Start up boiler.
Install a separate gas governor
downstream of the system and regulate
the pressure to 20 mbar for natural gas or
50 mbar for LPG.
Notify your mains gas or LPG supplier.
7. Shut down the boiler, close the
gas shut−off valve, remove the
pressure gauge, and close test
nipple A with the screw.
8. ¨ Safety instructions
Open the gas shut−off valve and
check test nipple A for
soundness.
(cont.)