Viessmann Vitopend 100-W Installation And Service Instructions For Contractors page 21

Further details regarding the individual steps
4. Check the static pressure and record
it in the "Reports" table.
Set value: max. 57.5 mbar
(5.75 kPa)
5. Start the boiler.
Note
During commissioning, the boiler can
enter a fault state because of airlocks
in the gas line.
To reset, turn off the ON/OFF switch
on the control unit and turn it on again
after approx. 3 s. The ignition process
will then repeat.
6. Check the supply (flow) pressure.
Set value:
■ Natural gas: 20/25 mbar
(2.0/2.5 kPa)
■ LPG: 28/30/37/50 mbar
(2.8/3.0/3.7/5.0 kPa)
Note
Use a suitable measuring instrument
with a resolution of at least 0.1 mbar
(0.01 kPa) to check the supply pres-
sure.
Commissioning, inspection, maintenance
(cont.)
7. Record the actual value in the
"Reports" table.
Take action as shown in the following
table.
8. Turn off the ON/OFF switch on the
control unit (the boiler shuts down).
Close the gas shut-off valve, remove
the pressure gauge and close test
connector A with the screw.
9. Open the gas shut-off valve and start
the appliance.
Danger
Gas escaping from the test
connector leads to a risk of
explosion.
Check the test connector for
gas tightness.
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