Viessmann Vitodens 050-W Installation And Service Instructions Manual page 25

Further details regarding the individual steps
A
Gas train viewed from the back.
1. Close the gas shut-off valve.
2. Undo screw A inside test connector
"IN" on the gas train, but do not
remove it. Connect the pressure
gauge.
3. Open the gas shut-off valve.
4. Check the static pressure.
Set value: max. 57.5 mbar
(5.75 kPa)
Commissioning, inspection, maintenance
(cont.)
5. Start the boiler.
Note
During commissioning, the boiler can
enter a fault state because of airlocks
in the gas line. After approx. 5 s,
press Reset to reset the burner.
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