Viessmann Vitodens 200-W Installation Instructions Manual page 59

Gas supply
Working
pressure for natural gas
below 17 .4 mbar
17 .4 to 25 mbar
in excess of 25 mbar
Working
pressure for LPG
below 37 mbar
37 to 57 .5
in excess of
57 .5 mbar
6. Check the working pressure.
Set values:
• natural gas 20 mbar
• LPG 37 mbar
Note
Use suitable test equipment with a
resolution of at least 0.1 mbar to measure
the supply pressure.
7 . Record the actual value in the service
report. Take the actions shown in the
following table.
8. Shut down the boiler, close the gas
shut-off valve, remove the pressure
gauge and close test port
screw.
9. Danger
Gas escaping from the test
port leads to a risk of
explosion, Check for
soundness.
Open the gas shut-off valve, start the
boiler and check for soundness at
test port .
A
Measures
Switch off boiler. Notify your mains
gas or LPG supplier.
Continue boiler operation.
Switch off boiler. Notify your mains
gas or LPG supplier.
with the
A
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