Viessmann Vitodens 222-F Installation And Service Instructions For Contractors page 37

Checking the static pressure and supply pressure
03. Undo screw
A inside test connector "PE" on the
gas train, but do not remove it, and connect the
pressure gauge.
04. Open the gas shut-off valve.
05. Check the static pressure and record the actual
value in the report on page 147.
Set value: max. 57.5 mbar (5.75 kPa).
06. Start the boiler.
Note
During commissioning, the boiler can enter a fault
state (fault EE is displayed) because of air in the
gas line. After approx. 5 s, press reset button R to
reset the burner.
07. Check the supply (flow) pressure.
Set value:
■ Natural gas: 20 mbar (2.0 kPa)
■ LPG: 50 mbar (5.0 kPa)
Note
Use a suitable measuring device with a resolution
of at least 0.1 mbar (0.01 kPa) to check the supply
pressure.
Supply pressure (flow pressure)
For natural gas
Below 17 mbar (1.70 kPa)
17 to 25 mbar
(1.70 to 2.5 kPa)
Above 25 mbar (2.5 kPa)
For LPG
Below 42.5 mbar
(4.25 kPa)
42.5 to 57.5 mbar
(4.25 to 5.75 kPa)
Above 57.5 mbar
(5.75 kPa)
Commissioning, inspection, maintenance
(cont.)
08. Record the actual value in the report on
page 147.
Implement measures as indicated in the table
below.
09. Shut down the boiler, close the gas shut-off valve,
remove the pressure gauge and close test con-
nector A with the screw.
10. Open the gas shut-off valve and start the appli-
ance.
Danger
Gas escaping from the test connector leads
to a risk of explosion.
Check gas tightness at test connector
11. Fit cover panel.
Steps
Do not commission the boiler. Notify the gas supply util-
ity or LPG supplier.
Start the boiler.
Install a separate gas pressure governor upstream of
the system and set the flow pressure to 20 mbar
(2.0 kPa) for natural gas or 50 mbar (5.0 kPa) for LPG.
Notify your gas supply utility or LPG supplier.
.
A
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