Viessmann VITODENS 300 WB3A, Service Instructions Manual

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Supply (flow)
pressure for nat-
ural gas Supply (flow)
pressure for
LPG Remedy
Below 17.4 mbar Below 42.5 mbar Do not start up. Notify your mains gas or
LPG supplier.
17.4 to 57.5 mbar 42.5 to
57.5 mbar Start up boiler.
Above 57.5 mbar Above 57.5 mbar Install a separate gas governor down-
stream of the system and regulate the
pressure to 20 mbar for natural gas or
50 mbar for LPG.Notify your mains gas
or LPG supplier.
7. Shut down the boiler, close the gas
shut-off valve, remove the pressure
gauge, and close test nipple
A
with the screw.
8. Open the gas shut-off valve and
start the boiler.
Danger
Gas escaping from the test
nipple leads to a risk of
explosion.
Check test nipple
A
for
soundness.
Checking the CO
2
settings
Vitodens 300 is factory-set for natural gas E or LPG P. The natural gas E version
can be converted to natural gas LL using a conversion kit. The LPG P version
can be converted to natural gas E or LL using a conversion kit.
During commissioning or maintenance, check the CO
2
level at the boiler adap-
tor.
Note
The MatriX burner for Vitodens 300 is preset for the entire gas group. Therefore,
the burner requires no further setting or adjustment.
Subject to the Wobbe index, the CO
2
content fluctuates between
Further details regarding the individual steps
(cont.)
14
Initial start-up, inspection, maintenance
56
92
550
GB