Viessmann Vitopend 100-W Installation And Service Instructions Manual page 20

Commissioning, inspection, maintenance
Further details regarding the individual steps
Note
The cover plate must be fitted to prevent air infiltrating.
Operation with LPG
Flush the LPG tank twice during commissioning or replacement. Vent the tank and
gas supply line thoroughly after flushing.
1. Close the gas shut-off valve.
2.
Release screw inside test nipple A
on the gas train, but do not remove it;
then connect the pressure gauge.
3. Open the gas shut-off valve.
4. Test the static pressure and record it
in the "Reports" table.
Set value: max. 57.5 mbar
5. Start the boiler.
Note
During commissioning, the boiler can
enter a fault state because of airlocks
in the gas line.
To reset, switch OFF the ON/OFF
switch on the control unit and switch
ON again after approx. 3 s. The igni-
tion process will then be repeated.
20
(cont.)
6. Check the supply (flow) pressure.
Set value:
■ Natural gas: 20/25 mbar
■ LPG: 28/30/37/50 mbar
Note
Use a suitable measuring device with
a resolution of at least 0.1 mbar to
check the supply pressure.
7. Record the actual value in the
"Reports" table.
Take the action shown in the follow-
ing table.
8. Switch OFF the system at the control
unit (the boiler shuts down), close the
gas shut-off valve, remove the pres-
sure gauge and close test nipple A
with the screw.
9. Open the gas shut-off valve and start
the appliance.
Danger
Gas escaping from the test
nipple leads to a risk of explo-
sion.
Check the test nipple for gas
tightness.